CN102519310A - Composite bulletproof plate made of ultra-high molecular weight polyethylene/silicon carbide - Google Patents
Composite bulletproof plate made of ultra-high molecular weight polyethylene/silicon carbide Download PDFInfo
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Abstract
The invention provides a composite bulletproof plate made of ultra-high molecular weight polyethylene/silicon carbide, which comprises an ultra-high molecular weight polyethylene plate and a silicon carbide plate connected onto the surface of the ultra-high molecular polyethylene plate by the aid of adhesive. The bulletproof plate is light in weight, high in strength and modulus and low in cost.
Description
Technical field
The present invention relates to the Antiballistic shaped part preparation field, relate in particular to a kind of ultra-high molecular weight polyethylene/silicon carbide compound armour.
Background technology
The victory or defeat of modern war remains the problem that solves lance and shield.Rifle, big gun, guided missile are lances, and bulletproof armour is a shield, and in struggle violence-averse, anti-terrorism neutralized modern major war, bulletproof armour can reduce injures and deaths, improve its combat capabilities, and increase the triumph factor, thereby research, to develop it be very necessary.The total development trend of armour material is Strengthening and Toughening, lightweight, multi-functional and high efficiency.Carborundum is one important in the bullet resistant material, and it has high hardness and wearability, high compressive strength and the good ballistic performance when heavily stressed.But the carborundum preparation is difficulty relatively, costs an arm and a leg.
Superhigh molecular weight polyethylene fibers is also claimed high-strength high-modulus polyethylene (HSHMPE) fiber or elongation chain (ECPE) polyethylene fibre, is meant that relative molecular mass is in (1～7) * 10
6Polyethylene, the ultra high molecular weight polyethylene fiber of after spinning-super drawing, processing.It is the third generation high-performance fiber after carbon fiber, aramid fiber (Kevlar) fiber.
Is a kind of superhigh molecular weight polyethylene fibers composite with said superhigh molecular weight polyethylene fibers through the no latitude cloth that step such as compound obtains; Compare with other fibre reinforced composites; Have light weight, shock-resistant, dielectric properties advantages of higher, change fields such as war and Aero-Space, marine site defence, weaponry in modern times and bringing into play very important effect.Simultaneously, this fiber also has broad application prospects in fields such as automobile, boats and ships, medicine equipment, athletic sports appliances.Therefore, superhigh molecular weight polyethylene fibers is just extremely paid attention to from coming out, and develops very fast.
The inventor considers ultra-high molecular weight polyethylene is combined with carborundum, prepares a kind of novel armour, but difficulty is to satisfy high-modulus, high strength and requirement cheaply after ultra-high molecular weight polyethylene of the prior art and the silicon carbide compound.
Summary of the invention
The technical problem that the present invention will solve is to provide the preparation method of the ultra-high molecular weight polyethylene/carborundum armour of a kind of light weight, high strength, high-modulus.
In order to solve above technical problem, the invention provides a kind of ultra-high molecular weight polyethylene material/silicon carbide compound armour, comprising:
High molecular weight polyethylene board material is provided; The surface density of said polyethylene board is 135g/cm
2More than;
Said high molecular weight polyethylene board material and carborundum is compound with binding agent; Obtain prefabricated component;
Said prefabricated component is applied 0.5～1MPa pressure, accomplish compoundly, obtain superhigh molecular weight polyethylene material/silicon carbide compound armour.
Preferably, contain 40～60 layers of no latitude cloth in the said high molecular weight polyethylene board material.
Preferably, the long limit of said high molecular weight polyethylene board material cross section is an arc.
Preferably, the thickness of said carborundum is 6～12mm.
Preferably, the preparation method of said high molecular weight polyethylene board material is:
A) provide ultra-high molecular weight polyethylene not have latitude cloth; The surface density of said no latitude cloth is 135g/cm
2More than;
B) the said ultra-high molecular weight polyethylene of several layers is not had latitude cloth and successively superpose and carry out pre-embossed, obtain prefabricated component;
C) said prefabricated component is carried out the compacting second time, obtain profiled member;
D) said profiled member is cooled to room temperature, obtains high molecular weight polyethylene board material.
Preferably, the ultra-high molecular weight polyethylene in the said step a) does not have latitude cloth and prepares through following method:
The superhigh molecular weight polyethylene fibers of 300～600D is arranged according to same direction, and with the thin polymer film bonding that contains binding agent;
2～4 said films that are bonded with fiber are stacked; Said two fibers that are bonded with in the film of fiber are vertical each other;
The said film that stacks is through compacting, and obtaining surface density is 135g/cm
2Above no latitude cloth.
Preferably, step b) is specially:
B1) said ultra-high molecular weight polyethylene not being had latitude cloth successively is laid in the mould;
B2) under 80～100 ℃, said mould is applied the pressure of 5～10MPa, pre-embossed 20～30min obtains prefabricated component.
Preferably, step c) is specially:
Said pre-press is applied the pressure of 25～30MPa under 100～140 ℃, carry out the compacting second time, obtain profiled member.
Preferably, the time of the said compacting second time is 20～30 minutes.
Preferably, comprise that also step e) cuts into 0.3～1m with said armour
3Size.
Ultra-high molecular weight polyethylene provided by the invention/silicon carbide compound armour comprises: high molecular weight polyethylene board material is provided; Said high molecular weight polyethylene board material and carborundum is compound with binding agent; Obtain bullet proof composite plating.The present invention is to provide a kind of bullet proof composite plating,,, reduce cost, alleviate quality so can substitute the part ultra-high molecular weight polyethylene board with carborundum because the carborundum price is cheap than ultra-high molecular weight polyethylene.In addition.Can improve the intensity of whole bullet proof composite plating, weight reduction with ultra-high molecular weight polyethylene board.Because high molecular weight polyethylene board material surface density provided by the invention is 135g/cm
2More than compound with the compound binding agent that needs of inorganic matter, must select suitable binding agent that two kinds of firm combinations of material can not reduced performance of products again.And has cheaper price than pure carborundum with the compound composite plate of ultra-high molecular weight polyethylene.
Description of drawings
Fig. 1 is that the present invention prepares the superhigh molecular weight polyethylene fibers schematic flow sheet;
Fig. 2 is an extraction process sketch map of the present invention;
Fig. 3 is a drawing process sketch map of the present invention;
Fig. 4 is the high molecular weight polyethylene board material cross sectional representation of embodiment of the invention preparation;
Fig. 5 is the ultra-high molecular weight polyethylene/silicon carbide compound armour cross sectional representation of embodiment of the invention preparation.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiments of the invention are described, but should be appreciated that these just restriction for further specifying feature and advantage of the present invention rather than patent of the present invention being required is described.
The invention provides a kind of ultra-high molecular weight polyethylene/silicon carbide compound armour, comprising:
High molecular weight polyethylene board material is provided; The surface density of said polyethylene board is 135g/cm
2More than;
Said high molecular weight polyethylene board material and carborundum is compound with binding agent; Obtain prefabricated component;
Said prefabricated component is applied 0.5～1MPa pressure, accomplish compoundly, obtain superhigh molecular weight polyethylene material/silicon carbide compound armour.
Carborundum (SiC) is to be that raw material forms through the resistance furnace pyrolytic semlting with quartz sand, petroleum coke (or coal tar), wood chip.Carborundum also exists unusual mineral, Mo Sangshi at the Nature.Carborundum is claimed moissanite again.Carborundum has black silicon carbide and two basic kinds commonly used of green silicon carbide, all belongs to α-SiC.It is about 95% that black silicon carbide contains SiC, and its toughness is higher than green silicon carbide, is used to process the low material of tensile strength mostly, like glass, pottery, stone material, refractory material, cast iron and non-ferrous metal etc.It is about more than 97% that green silicon carbide contains SiC, and self-sharpening is good, is used for processing rigid alloy, titanium alloy and optical glass mostly, also is used for honing cylinder sleeve and correct grinding high-speed steel tool.Also have cubic silicon carbide in addition, it is the yellow green crystal of producing with special process, is suitable for the microstoning of bearing in order to the grinding tool of making, can make surface roughness from Ra32～0.16 micron time processing to Ra0.04～0.02 micron.
Carborundum is because stable chemical performance, thermal conductivity factor are high, thermal coefficient of expansion is little, anti-wear performance good; Except that making abrasive material usefulness; Also have a lot of other purposes; For example: coat the inwall of turbine impeller or cylinder block to silicon carbide powder with special process, can improve its wearability and increase the service life 1～2 times; In order to the high grade refractory of processing, heat-resisting shake, volume is little, in light weight and intensity is high, good energy-conserving effect.Low grade carborundum (containing SiC about 85%) is fabulous deoxidier, can accelerate steel-making speed with it, and be convenient to control chemical composition, improves the quality of steel.In addition, carborundum also is used to make the heating Elema in a large number.
In order to solve the technical problem that the present invention proposes, the inventor considers from the material choice to preparation method, need improve, the raw material that at first uses as surface density at 135g/cm
2Above high molecular weight polyethylene board material, said sheet material is composited for no latitude cloth.High strength and high-modulus just need the dawn number of the polyethylene fibre of use to want big if desired.According to the present invention, preferably use the superhigh molecular weight polyethylene fibers of 360D～600D.The carborundum that the present invention uses is black silicon carbide.
Said ultra-high molecular weight polyethylene powder is that weight average molecular weight (Mw) is the linear ultra-high molecular weight polyethylene of (1～7) * 106; Preferably; Said ultra-high molecular weight polyethylene is that weight average molecular weight is the linear ultra-high molecular weight polyethylene of (1.5～4.5) * 106; Preferred, the weight average molecular weight of said ultra-high molecular weight polyethylene is the linear ultra-high molecular weight polyethylenes in (1.8～4.0) * 106.The powder size of said ultra-high molecular weight polyethylene is 40 μ m～200 μ m, and preferred, said ultra-high molecular weight polyethylene powder size is 80 μ m～180 μ m.
Solvent as the ultra-high molecular weight polyethylene spinning solution is to be the hydrocarbon of liquid under the room temperature; Preferably; Can be hydrogenated naphthalene or alkane series; For example can be selected from one or more solvents as ultra-high molecular weight polyethylene in tetrahydronaphthalene, decahydronaphthalenes, kerosene, mineral oil or the paraffin, preferred, can select molecular weight for use is 40～1000 No. 7 white oils solvents as ultra-high molecular weight polyethylene.
According to the present invention; With said ultra-high molecular weight polyethylene and solvent swelling 20 minutes～60 minutes in temperature is 70 ℃～130 ℃ scope; Preferably, with said ultra-high molecular weight polyethylene and solvent swelling 25 minutes～55 minutes in temperature is 75 ℃～125 ℃ scope.In order to prepare the high super high molecular polyethylene solution of spinning property; The percentage by weight of ultra-high molecular weight polyethylene is 70wt%～97.6wt% in the spinning solution provided by the invention; Preferably; The percentage by weight of ultra-high molecular weight polyethylene is 70wt%～97.6wt% in the spinning solution, and is preferred, and the percentage by weight of ultra-high molecular weight polyethylene is 70wt%～97.6wt% in the spinning solution.
The ultra-high molecular weight polyethylene swelling is prepared after the spinning solution, need further to adopt double screw extruder push dissolving preparation spinning solution spinning solution.Wherein, the feeding mouth temperature of double screw extruder is 90 ℃～120 ℃, 160 ℃～200 ℃ of the temperature of middle extruding dissolving, and outlet temperature is 150 ℃～190 ℃; The time of staying of spinning solution in double screw extruder, preferred, the time of staying of spinning solution in double screw extruder is 3～8 minutes, and be preferred in order to be no more than 10 minutes, and the time of staying of spinning solution in double screw extruder is 4～6 minutes; The rotary speed of double screw extruder is 30～300r/min, and preferred, the rotary speed of double screw extruder is 70～270r/min, and is preferred, and the rotary speed of double screw extruder is 90～200r/min.
After the preparation spinning solution, adopt gel spinning technology to use superhigh molecular weight polyethylene fibers spinning solution provided by the invention to prepare superhigh molecular weight polyethylene fibers.The process conditions of gel spinning are: the aperture of spinneret orifice is 0.6mm～5mm, and preferred, the aperture of spinneret orifice is 0.7mm～2mm; Spinneret orifice draw ratio L/D is 6/1～30/1, and the spinning solution rate of extrusion is 0.5m/min～5m/min, and spinning solution is through 20 ℃～60 ℃ cooling and shaping, and the shower nozzle drafting multiple is no more than 2 times; Preferably, the shower nozzle drafting multiple is no more than 1.8 times.
After the gel fiber moulding, said gel fiber left standstill obtained as-spun fibre in 16 hours～26 hours.
Preparation need extract as-spun fibre behind the as-spun fibre, dry, ultra times hot-stretch.
When as-spun fibre was extracted, the extractant of selecting for use should have good mixing mutually or intermiscibility for solvent, and has low boiling point and high volatility.Used extractant can be volatile lower paraffin hydrocarbon and halogenated hydrocarbons.For example when using paraffin oil, can select for use hexane, heptane, toluene, chloromethanes, solvent wet goods as extractant as solvent, preferred, select for use industrial naptha as extractant, most preferably be solvent naphtha No. 120.As-spun fibre carries out drying to it and makes the extractant volatilization, and then surpass a times hot-stretch through after extracting in 40 ℃～80 ℃ temperature range.
With being dried the extractant of removing on the as-spun fibre after the as-spun fibre extraction, baking temperature can be 40 ℃～90 ℃, and preferred, baking temperature is 50 ℃～70 ℃.Drying is carried out through the mode of dry combustion method, does not have liquid substance in the dry combustion method case, and solvent directly is evaporated to gas.Said dry combustion method operation is preferably through 3 road dry combustion method casees.After the drying, the temperature of carrying out the ultra times hot-stretch in 5 roads is 70 ℃～130 ℃, and is preferred, in 85 ℃～135 ℃ temperature range, surpasses a times hot-stretch.For holding temperature, can preferably in said path, feed the identical saturated steam of temperature.During stretching, make as-spun fibre, in the path, feed protective gas then, can be inert gas or nitrogen through the path, preferred, select for use nitrogen after the heating as protective gas.Drafting machine can be selected hot-rolling drafting machine or cold roller drafting machine for use, and is preferred, selects the hot-rolling drafting machine for use, and the temperature of hot-rolling is preferably 70～90 ℃, can play the effect of preheating to fiber.Among this paper, when fiber being applied stretching, need carry out at a certain temperature; Therefore the pipe, casing, cylinder of both ends open etc. are arranged between drafting machine; Feeding therein needs the gas of temperature then, and the cylinder that fiber passes is promptly instigated in hot path, path among this paper, but is not limited thereto.
According to the present invention, total draw ratio of said stretching is 10～13 times, more preferably 11～12 times.Finally obtain the superhigh molecular weight polyethylene fibers that fiber number is 600D.Total draw ratio is that the addition again through the ratio of the speed of every adjacent twice drawing-off obtains.Draw ratio is big more, and fiber is thin more, and modulus and intensity are just low more.
Also comprise at last said fiber is wound into tubular through up-coiler, obtain the product of corresponding specification after the packing.
In order to prepare no latitude cloth, said superhigh molecular weight polyethylene fibers is spread on the thin polymer film that is coated with binding agent in advance with excellent properties.Because the effect of binding agent is that fiber is bonded together and can all or part of parcel fiber; And in bullet resistant material, work to absorb and transmit the bullet energy; Therefore should select to have material that excellent mechanical property and fiber have the good combination ability as adhesive; Can select for use polymer matrix material as adhesive; Preferably, select thermoplastic as adhesive, the thermoplastic that can select for use is polyurethane, polyvinyl polymer, polyacrylic, polyolefin or thermoplastic elastomeric block copolymers.Choosing is more arranged, and said binding agent is selected from polystyrene triblock copolymer (SIS, styrene-isoprene-phenylethene), or Tsing-Hua University's polystyrene triblock copolymer (SIBS, polystyrene-ethene-butylene-styrene).Said binding agent can be the solvent-borne type binding agent, and used solvent can be selected from benzene, toluene, chloroform, carbon tetrachloride, hexane, cyclohexane, chlorination cyclohexane, diethyl ether, methyl-isobutyl ether, ethyl acetate, amyl acetate etc.In binder solution, the weight ratio of binding agent and solvent is 10～40: 90～60, and preferred, the mass ratio of binding agent and solvent is 15～35: 85～65, and is preferred, and the mass ratio of binding agent and solvent is 20～30: 80～70.
Because its main shellproof effect is superhigh molecular weight polyethylene fibers in the no latitude cloth; Therefore suitable binding agent consumption in should unloaded no latitude cloth; In no latitude cloth, the content of binding agent can be 10～30wt%, and the content of preferred binding agent is 14～30wt%; Most preferred, the Han Lang of binding agent is 18～20wt%.
According to the present invention, said thin polymer film be preferably can be good with the binding agent adhesion polyolefin film or polyester film.More preferably polyethylene film, polypropylene film or haloflex film most preferably are polyethylene film.Said polyethylene film is that the number-average molecular weight of said low density polyethylene (LDPE) is preferably 8000～12000 by the low density polyethylene (LDPE) preparation.The mode of coated with adhesive is preferably spraying, manual application, the gluing of upper glue roller machinery.Be parallel to each other between the said superhigh molecular weight polyethylene fibers, spread apart in the same way, the carding operation that can assist through carding machine is more evenly distributed said superhigh molecular weight polyethylene fibers, and single degree of orientation is higher, and surface density is higher.
2～4 blocks of thin polymer films that are bonded with superhigh molecular weight polyethylene fibers are stacked; Filament on the said two adjacent polymeric thing films becomes 0 °/90 ° arrangements, and promptly the filament on two thin polymer films becomes vertical relation so just to make that no latitude cloth tool all can be stressed even at horizontal and vertical both direction mutually.
According to the present invention, can also superhigh molecular weight polyethylene fibers be bonded in the two sides of said thin polymer film according to 0 °/90 ° mode, practiced thrift material, reduced thickness.
At last the said thin polymer film that is bonded with superhigh molecular weight polyethylene fibers is applied the pressure of 5～10MPa under 50～70 ℃, the thin polymer film of long 100m need be suppressed 200～300 seconds, obtained not having latitude cloth.This process is in order to make firm being bonded on the said thin polymer film of said superhigh molecular weight polyethylene fibers, if the too high binding agent of temperature can be crossed the arrangement that influences fiber because of flowability, bubbling or pore phenomenon to occur.The compounding machine that said pressing operation can use those skilled in the art to know carries out; Said compounding machine comprises 2 pressure rollers at least; Filament is spread on the said thin polymer film, thin polymer film is guided in the middle of two pressure rollers through guide wheel, the distance of adjustment pressure roller is a pressure; Under the drive of pressure roller that fiber and thin polymer film is compound, a compression moulding.The temperature of said pressure roller remains between 50～70 ℃, to satisfy binding agent fiber is fixed on the thin polymer film.
After having prepared no latitude cloth, said no latitude cloth is successively overlayed in the mould of hydraulic press.The surface of said mould top die and dip mold is arc.Polyethylene is a kind of thermoplastic polymer; If directly suppress, can deform at the too fast polyethylene fibre that heats up, fiber and binding agent come off; Distortion and the purpose of advanced pre-embossed is for polyethylene fibre and the adhesion of binding agent in the no latitude cloth are weakened; But be unlikely to come off, make the no latitude cloth attitude that mediates, eliminate the stress between the no latitude cloth and get rid of the air between the no latitude cloth.Polyethylene fiber peacekeeping binding agent just can be inter-adhesive.Carry out the compacting second time after the pre-embossed again, the probability that the distortion of polyethylene fibre and displacement take place can be very little, under the effect of pressure and temperature, bonds each other between the no latitude cloth, finally obtains profiled member.According to the present invention, the number of plies that the ultra-high molecular weight polyethylene that contains in the said profiled member does not have latitude cloth is 30～200 layers, and what are relevant with surface density and gross mass for the number of plies, and through formula: weight/surface density of every cubic centimetre=number of plies is calculated the needed number of plies.According to the present invention, the said number of plies is more elected 50～100 layers as.The number of plies is more just can defend power to follow strong weapon more.
According to the present invention, said pre-embossed is specially: b1) said ultra-high molecular weight polyethylene is not had latitude cloth and successively be laid in the mould;
B2) under 80～100 ℃, said mould is applied the pressure of 5～10MPa, pre-embossed 20～30min obtains prefabricated component.
More preferably 85～95 ℃ of the temperature of pre-embossed, pressure is 7～9MPa, squeeze time is preferably 23～27 minutes.In order to obtain the uniform armour of hardness, intensity and modulus, the mould of said pre-embossed is preheating in advance preferably, and the temperature of preheating is 60～70 ℃.Mould is exerted pressure the time, can be gradually pressure be raise, the speed that is preferably the 1MPa per minute is carried out; Until rising to 5～10MPa; After the precompressed, the prefabricated component that obtains has had the basic configuration of armour, but tight not enough; Need further compacting, so the present invention has also carried out compacting for the second time to said prefabricated component.
For the second time the process of compacting is specially: said pre-press is applied the pressure of 25～30MPa under 100～140 ℃, carry out second time and suppress, obtain profiled member.For the second time the purpose of compacting is for the prefabricated component compacting; Its density is increased; Owing to made polyethylene fibre that fixing orientation and form arranged during pre-embossed, so when suppressing for the second time, temperature is risen to 100～140 ℃; Pressure is risen to 25～30MPa by 5～10MPa rapidly, more preferably 27～28MPa.Kept pressure then 20～30 minutes, pressurize is after 3～5 minutes, and slowly release pressure obtains profiled member.Because the temperature of profiled member is higher; The pliability of polyethylene fibre is higher, all can make it have slight distortion to the touching of armour, so will make its cooling rapidly; The present invention preferably carries out water quench to said profiled member after obtaining profiled member, said profiled member is cooled to room temperature.
Because cooling water can be reduced to room temperature with the polyethylene fibre under the high temperature upper state rapidly; Make the motion of strand slow down, slight crosslinking curing between the polyethylene molecule can keep the shape invariance of suppressing; Improve the hardness and the modulus of table napkin spare, this process can be referred to as " sulfuration ".
Cooled ultra-high molecular weight polyethylene board is cut into 0.3～1m
3Specification, the convenient use.Because the top die of the mould that the present invention uses and the surface of dip mold are arc, so the long limit of the cross section of the armour of the present invention's preparation also is an arc.The arc outwards one side of protrusion can slow down the impulsive force of bullet when the projectile impact armour, slows down bullet velocity, improves bulletproof effect.As shown in Figure 4, comprising that ground floor does not have latitude cloth 1, the second layer and do not have latitude cloth 3, the x layer does not have latitude cloth 3, the n layers does not have latitude cloth 4.According to the present invention, said n is 30～200, and x is an any integer value in 2～200.The armour of preparation method's preparation provided by the invention is not superpose according to different machine directions through will there being latitude cloth, forms many structures through many latitudes, and the dimension direction of the no latitude cloth of every adjacent two layers is all inequality.The filament direction of preferred every adjacent two no latitude cloth becomes 0 °/90 ° arrangements.
Get high molecular weight polyethylene board material surface-coated first binding agent for preparing, said first binding agent is preferably epoxide-resin glue or polystyrene triblock copolymer, and said carborundum is placed said high molecular weight polyethylene board material surface.With the composite molding under 0.5～1.5MPa of said prefabricated component, obtain bullet proof composite plating.The no latitude cloth number of plies according to containing in the high molecular weight polyethylene board material according to the invention is 40～60 layers; The thickness of the sheet material of said carborundum is 6～12mm.According to the present invention, said carborundum is preferably the surface and is the carborundum sheet material of arc, the bulletproof ceramic of He'nan Jiyuan Brother Material Co., Ltd.'s production more preferably.As shown in Figure 5, the cross sectional representation for bullet proof composite plating provided by the invention comprises: carborundum sheet material 1, ultra-high molecular weight polyethylene board 2.
Also comprise at last said armour is wrapped up with cloth, be prepared into various ballistic resistant products, like flak jackets, bullet-proof vest, ballistic protective clothing etc.
Below be the embodiment of the invention, specifically set forth the present invention program:
The preparation superhigh molecular weight polyethylene fibers: after the 230kg7 solvent naphtha is preheating to 112 ℃, again the 40000kg ultra-high molecular weight polyethylene is placed on to stir in the swelling still 101 with No. 7 solvent naphthas and carries out preliminary swelling, tentatively swelling time is 20 minutes.After the preliminary swelling, be that second part of No. 7 solvent naphtha 690kg of 98 ℃ are added to and carry out swelling in the swelling still again and obtain spinning solution with temperature again, swelling time is 30 minutes again, and mixing speed is constant, the environment temperature of swelling still is dropped to 98 ℃ swelling the time again.
Obtain uniform spinning solution again after the swelling, spinning solution is sent into sent into double screw extruder 103 again after being cooled to 25 ℃ in the material storage kettle 102 and push dissolving.Wherein, mouthful temperature of sending into of double screw extruder is that 100 ℃, medium temperature are that 185 ℃, outlet temperature are 165 ℃, and the time that in double screw extruder, stops is 5 minutes, and the twin-screw rotary speed is 180rpm.Spinning solution twines, extrudes and process transparent frozen glue solution through separating of twin-screw.
With frozen glue solution through measuring pump 104, have spinneret 105 (the orifice diameter 0.8mm in 400 holes; Draw ratio L/D is 10/1) extrude with the spray silk speed of 1m/min that to get into temperature be that 25 ℃ the tank 106 that solidifies makes the strand typing, the jet stretch of adopting 107 pairs of gel fibers of jet stretch machine to apply 1.5 times then obtains gel fiber.Gel fiber is put into and is left standstill bucket and 110 left standstill 18 hours.
Referring to Fig. 2; Adopt No. 120 solvent naphthas to carry out five grades extraction the gel fiber after leaving standstill; So-called five grades extraction is to make fiber successively from low to high through first extraction box 201, second extraction box 202, the 3rd extraction box 203, the 4th extraction box 204, the 5th extraction box 205; Wherein the solvent naphtha in the 5th extraction box flows through the 4th extraction box, the 3rd extraction box, second extraction box, first extraction box from high to low successively, and giving of solvent naphtha and gel fiber is in the opposite direction.
Gel fiber is through dry through 55 ℃, 60 ℃, 65 ℃ two-stage successively again after extracting.
Referring to Fig. 3; Dried gel fiber is fed the hot path in the hot path in the hot path of first drafting machine 301, first 302, second drafting machine 303, second 304, the 3rd drafting machine the 305, the 3rd 306, the 4th drafting machine 307 successively, adopt then and receive silk device 308 and receive silk.Wherein, the temperature in the first hot path is that 90 ℃, the temperature in the second hot path are 110 ℃, and the temperature in the 3rd hot path is 125 ℃; First drafting machine, second drafting machine, the 3rd drafting machine, the 4th drafting machine all are five roller drafting machines, in order to reach the object of the invention, do not have concrete restriction for leading refreshing machine the present invention, as long as can satisfy drafting multiple; The roller temperature of first drafting machine is 90 ℃, and the roller temperature of second drafting machine is 110 ℃, and the roller temperature of the 3rd drafting machine is 125 ℃, and the roller temperature of the 4th drafting machine is 15 ℃.Second drafting machine doubly is 3.3 times to leading of applying of as-spun fibre, and the 3rd drafting machine doubly is 3.5 times, the 4th drafting machine to leading of applying of as-spun fibre to leading of applying of as-spun fibre doubly is 3.9 times.Total draw ratio is 10.7 times.
After gel fiber surpasses times hot-stretch through five roads, adopt and receive the superhigh molecular weight polyethylene fibers that silk device receipts silk obtains 360D.
Embodiment 2
After the 230kg7 solvent naphtha is preheating to 112 ℃, again 40000kg ultra-high molecular weight polyethylene and No. 7 solvent naphthas is placed on to stir in the swelling still 101 and carries out preliminary swelling, preliminary swelling time is 20 minutes.After the preliminary swelling, be that second part of No. 7 solvent naphtha 690kg of 98 ℃ are added to and carry out swelling in the swelling still again and obtain spinning solution with temperature again, swelling time is 30 minutes again, and mixing speed is constant, the environment temperature of swelling still is dropped to 98 ℃ swelling the time again.
Obtain uniform spinning solution again after the swelling, spinning solution is sent into sent into double screw extruder 103 again after being cooled to 25 ℃ in the material storage kettle 102 and push dissolving.Wherein, mouthful temperature of sending into of double screw extruder is that 100 ℃, medium temperature are that 185 ℃, outlet temperature are 165 ℃, and the time that in double screw extruder, stops is 5 minutes, and the twin-screw rotary speed is 180rpm.Spinning solution twines, extrudes and process transparent frozen glue solution through separating of twin-screw.
With frozen glue solution through measuring pump 104, have spinneret 105 (the orifice diameter 0.8mm in 400 holes; Draw ratio L/D is 10/1) extrude with the spray silk speed of 1m/min that to get into temperature be that 25 ℃ the tank 106 that solidifies makes the strand typing, the jet stretch of adopting 107 pairs of gel fibers of jet stretch machine to apply 1.5 times then obtains gel fiber.Gel fiber is put into and is left standstill bucket and 110 left standstill 18 hours.
Referring to Fig. 2; Adopt No. 120 solvent naphthas to carry out five grades extraction the gel fiber after leaving standstill; So-called five grades extraction is to make fiber successively from low to high through first extraction box 201, second extraction box 202, the 3rd extraction box 203, the 4th extraction box 204, the 5th extraction box 205; Wherein the solvent naphtha in the 5th extraction box flows through the 4th extraction box, the 3rd extraction box, second extraction box, first extraction box from high to low successively, and giving of solvent naphtha and gel fiber is in the opposite direction.
Gel fiber is through dry through 55 ℃, 60 ℃, 65 ℃ two-stage successively again after extracting.
Referring to Fig. 3; Dried gel fiber is fed the hot path in the hot path in the hot path of first drafting machine 301, first 302, second drafting machine 303, second 304, the 3rd drafting machine the 305, the 3rd 306, the 4th drafting machine 307 successively, adopt then and receive silk device 308 and receive silk.Wherein, the temperature in the first hot path is that 90 ℃, the temperature in the second hot path are 110 ℃, and the temperature in the 3rd hot path is 125 ℃; First drafting machine, second drafting machine, the 3rd drafting machine, the 4th drafting machine all are five roller drafting machines, in order to reach the object of the invention, do not have concrete restriction for leading refreshing machine the present invention, as long as can satisfy drafting multiple; The roller temperature of first drafting machine is 90 ℃, and the roller temperature of second drafting machine is 110 ℃, and the roller temperature of the 3rd drafting machine is 125 ℃, and the roller temperature of the 4th drafting machine is 15 ℃.Second drafting machine doubly is 1.3 times to leading of applying of as-spun fibre, and the 3rd drafting machine doubly is 2.5 times, the 4th drafting machine to leading of applying of as-spun fibre to leading of applying of as-spun fibre doubly is 3.9 times.Total draw ratio is 8.7 times.
Embodiment 3
Use the superhigh molecular weight polyethylene fibers of embodiment 1 preparation, said fiber is sprawled being coated with on the low-density polyethylene film of polystyrene triblock copolymer.With 2 blocks of said thin polymer films that are bonded with fiber under the effect of guide wheel through two pressure rollers that rotate, the temperature of pressure roller is 60 ℃, the 8MPa that exerts pressure, obtaining fabric width is the no latitude cloth of 1.6m.Because what use is the filament of 600D, so the surface density of said no latitude cloth is 160g/cm
2
Getting 40 layers of above-mentioned bilayer does not have latitude cloth mutual superposition in mould, and the pressure that under 85 ℃, applies 8MPa carries out pre-embossed, and the air between the lamination is overflowed; After keep-uping pressure 25 minutes temperature is risen to 120 ℃; Pressure rises to 30MPa, and constant temperature pressurize 25 minutes obtains profiled member; With cooling water said profiled member is cooled to room temperature at last, cuts into 0.3m
2Specification obtain high molecular weight polyethylene board material, get the thick carborundum of 6mm, be bonded on the said high molecular weight polyethylene board material with epoxide-resin glue, and prefabricated component applied the pressure of 1MPa, obtain bullet proof composite plating, said armour weight is 2.1kg.Adopt America NI J0101.04 side monomer testing standard that this armour is carried out the ballistic performance test, the result shows it can resist 9.6g, and speed is 847m/ 7.62 millimeters bore all-metals coating bullets of second.
Embodiment 4
Use the superhigh molecular weight polyethylene fibers of embodiment 1 preparation, said fiber is sprawled being coated with on the low-density polyethylene film of binding agent.With 2 blocks of said thin polymer films that are bonded with fiber under the effect of guide wheel through two pressure rollers that rotate, the 9.2MPa that exerts pressure obtains fabric width and is the no latitude cloth of 1.2m because what use is the filament of 600D, so the surface density of said no latitude cloth is 160g/cm
2
Getting 100 layers of above-mentioned bilayer does not have latitude cloth mutual superposition in mould, and the pressure that under 80 ℃, applies 5MPa carries out pre-embossed, and the air between the lamination is overflowed; After keep-uping pressure 25 minutes temperature is risen to 125 ℃; Pressure rises to 25MPa, and constant temperature pressurize 25 minutes obtains profiled member; With cooling water said profiled member is cooled to room temperature at last, cuts into 0.5m
2Specification obtains high molecular weight polyethylene board material, gets the thick carborundum of 8mm, is bonded on the said high molecular weight polyethylene board material with epoxide-resin glue, and prefabricated component is applied the pressure of 1MPa, obtains bullet proof composite plating, and said armour weight is 2.30kg.Adopt America NI J0101.04 side monomer testing standard that this armour is carried out the ballistic performance test, the result shows it can resist 10.8g, and speed is that 7.62 millimeters bore all-metals of 869 meter per seconds coat bullet.
Embodiment 5
Use the superhigh molecular weight polyethylene fibers of embodiment 1 preparation, said fiber is sprawled being coated with on the low-density polyethylene film of binding agent.With 2 blocks of said thin polymer films that are bonded with fiber under the effect of guide wheel through two pressure rollers that rotate, the 9.2MPa that exerts pressure obtains fabric width and is the no latitude cloth of 1.2m because what use is the filament of 600D, so the surface density of said no latitude cloth is 160g/cm
2
Getting 200 layers of above-mentioned bilayer does not have latitude cloth mutual superposition in mould, and the pressure that under 80 ℃, applies 10MPa carries out pre-embossed, and the air between the lamination is overflowed; After keep-uping pressure 25 minutes temperature is risen to 140 ℃; Pressure rises to 30MPa, and constant temperature pressurize 30 minutes obtains profiled member; With cooling water said profiled member is cooled to room temperature at last, cuts into 0.5m
2Specification obtains high molecular weight polyethylene board material, gets the thick carborundum of 6mm, is bonded on the said high molecular weight polyethylene board material with epoxide-resin glue, and prefabricated component is applied the pressure of 1MPa, obtains bullet proof composite plating, and said armour weight is 2.32kg.Adopt America NI J0101.04 side monomer testing standard that this armour is carried out the ballistic performance test, the result shows it can resist 10.8g, and speed is that 7.62 millimeters bore all-metals of 869 meter per seconds coat bullet.
Comparative example 1
Be prepared into shellproof sheet material with the thick carborundum of 12mm; Adopt America NI J0101.04 side monomer testing standard that this armour is carried out the ballistic performance test; The result shows a 9.6g; Speed is that 7.62 millimeters bore all-metals of 847m/ second coat the armour that bullets can puncture comparative example 1 preparation, and intensity and modulus are lower than the armour that said embodiment 3 prepares.
More than a kind of ultra-high molecular weight polyethylene provided by the invention/silicon carbide compound armour has been carried out detailed introduction; Having used concrete example among this paper sets forth principle of the present invention and embodiment; The explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. ultra-high molecular weight polyethylene/silicon carbide compound armour is characterized in that, comprising:
Ultra-high molecular weight polyethylene board;
Be connected the lip-deep carborundum plate of said ultra-high molecular weight polyethylene board through binding agent.
2. preparation method according to claim 1 is characterized in that, contains 40～60 layers of no latitude cloth in the said high molecular weight polyethylene board material.
3. preparation method according to claim 1 is characterized in that, the long limit of said ultra-high molecular weight polyethylene/silicon carbide compound armour cross section is an arc.
4. preparation method according to claim 1 is characterized in that, the thickness of said carborundum is 6～12mm.
5. preparation method according to claim 1 is characterized in that, the preparation method of said high molecular weight polyethylene board material is:
A) provide ultra-high molecular weight polyethylene not have latitude cloth; The surface density of said no latitude cloth is 135g/cm
2More than;
B) the said ultra-high molecular weight polyethylene of several layers is not had latitude cloth and successively superpose and carry out pre-embossed, obtain prefabricated component;
C) said prefabricated component is carried out the compacting second time, obtain profiled member;
D) said profiled member is cooled to room temperature, obtains high molecular weight polyethylene board material.
6. preparation method according to claim 5 is characterized in that, the ultra-high molecular weight polyethylene in the said step a) does not have latitude cloth and prepares through following method:
The superhigh molecular weight polyethylene fibers of 300～600D is arranged according to same direction, and with the thin polymer film bonding that contains binding agent;
2～4 said films that are bonded with fiber are stacked; Said two fibers that are bonded with in the film of fiber are vertical each other;
The said film that stacks is through compacting, and obtaining surface density is 135g/cm
2Above no latitude cloth.
7. preparation method according to claim 5 is characterized in that step b) is specially:
B1) said ultra-high molecular weight polyethylene not being had latitude cloth successively is laid in the mould;
B2) under 80～100 ℃, said mould is applied the pressure of 5～10MPa, pre-embossed 20～30min obtains prefabricated component.
8. preparation method according to claim 2 is characterized in that step c) is specially:
Said pre-press is applied the pressure of 25～30MPa under 100～140 ℃, carry out the compacting second time, obtain profiled member.
9. preparation method according to claim 5 is characterized in that, the time of the said compacting second time is 20～30 minutes.
10. preparation method according to claim 5 is characterized in that, comprises that also step e) cuts into 0.3～1m with said armour
3Size.
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| CN102901407A (en) * | 2012-10-25 | 2013-01-30 | 宁波荣溢化纤科技有限公司 | Body armour and IV-level silicon carbide bulletproof insertion plate with clothes on single curved surface |
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Application publication date: 20120627 |