CN101684991A - Method for preparing bulletproof formed part - Google Patents
Method for preparing bulletproof formed part Download PDFInfo
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- CN101684991A CN101684991A CN200810161475A CN200810161475A CN101684991A CN 101684991 A CN101684991 A CN 101684991A CN 200810161475 A CN200810161475 A CN 200810161475A CN 200810161475 A CN200810161475 A CN 200810161475A CN 101684991 A CN101684991 A CN 101684991A
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Abstract
The invention discloses a method for preparing a bulletproof formed part, which comprises the following steps: (a) superposing a plurality of weftless fabric pressure layers and a plurality of knittedfabrics, and applying a pressure of 1-3 MPa at 100-115 DEG C to carry out the pre-press forming, wherein the weftless fabric pressure layers and the knitted fabrics comprise fibers of which the strength is at least 15 cN/dtex and the modulus is at least 390 cN/dtex; (b) and applying a pressure of 10-20 MPa on the pre-press formed part in step (a) at 120-130 DEG C to carry out the hot press forming, thereby obtaining the bulletproof formed part. The weftless fabric pressure layers have favorable bulletproof functions of relieving bullet head performance and preventing bullet heads to advance,the knitted fabric pressure layers have favorable elasticity and favorable function of capturing bullet heads, and therefore, the kinetic energy of the bullet heads can be effectively relieved after the bullet heads are subjected to the gradient protection actions of hindrance and capture. The bulletproof formed part prepared by the method in the invention has favorable bulletproof function and can prevent the user from being hurt by bullets.
Description
Technical field
The present invention relates to the preparation method of individual protective equipment, be specifically related to a kind of preparation method of Antiballistic shaped part.
Background technology
Flak jackets, bulletproof halmet are the individual protection equipments of dressing for guarantor's existence under specific environment, and it can absorb and the kinetic energy of dissipation bullet, shell fragment, and prevention penetrates, and effectively protects the position of being protected of human body.
Though the protection level of conventional steel material can satisfy ballistic requirements, weight is too big because steel material has, rigidity reaches shortcomings such as comfortableness difference too by force, not only can make the mobility of wearer be restricted, but also the danger that exists ricochet to hurt sb.'s feelings.Along with the continuous progress of material science, the appearance of high-tech synthetic fibers such as aramid fiber (Kelar) and ultra-high molecular weight polyethylene (UHMWPE) fiber is that the development of bullet resistant material has brought revolutionary variation.These class synthetic fibers are compared with ferrous materials all has higher specific strength and specific modulus, therefore energy absorption capability outclass ferrous materials, when being used for individual protections equipment such as bulletproof halmet or flak jackets, and lighter weight, comfortableness is strong, and the mobility of wearer can not be restricted.The main feature of aramid fiber is that density is low, in light weight, intensity is high, good toughness, high temperature resistant, resistance to chemical attack, and insulating properties and textile performance are good, are easy to processing and moulding.Compare with aramid fiber, the super high molecular weight fiber has lower density, higher intensity and modulus, but hear resistance, thermal expansivity and textile performance are inferior slightly, and has certain creep and stress relaxation.
When synthetic fibers are used for the individual protection equipment, make various ballistic fabrics according to different situations, and then with ballistic fabric and the compound composite of making of appropriate resin.The shellproof mechanism of ballistic fabric is to clear up the kinetic energy of bullet by the deformation and failure of the yarn that is made of fiber in the fabric.Ballistic fabric mainly is divided into knitted fabric, woven fabric, no latitude cloth and needling non-woven felt etc., and these several kind fabrics are because therefore its structure difference has different shellproof mechanism.
Knitted fabric is that yarn passes through the knitting formation of motion clocklike coil, the mutual fabric that overlaps and form of going here and there between coil and the coil.Because knitted fabric has higher percentage elongation, deformation rate is bigger, therefore has certain effect for catching bullet, Chinese patent CN1072795C discloses a kind of bulletproof halmet, be made of the multi-layered textile thing, multiaxis is contained to knitted fabric in the centre, but because knitted fabric elasticity is big, be that deformation rate is bigger, cause non-penetrability wound easily.
No latitude cloth is the technology of U.S.'s allied signal (Allied Signal) company at the superhigh molecular weight polyethylene fibers invention, claim the individual event permutation technology again, be meant by polyethylene fibre by even, parallel, the straight and upright continuous preimpregnation band that this is carried out after the continuous band impregnation, drying, the single orientation fibers of acquisition of lining up.Compare with longitude and latitude weaving cloth, single-oriented presoaked belts has been avoided interweaving of filling yarn, and crimping bending repeatedly can not take place fiber, therefore can not reduce the original mechanical property of fiber; In addition, the space appears in the longitude and latitude place of interweaving easily, influences composite property, and single-oriented presoaked belts then is that fiber is arranged in parallel, so composite can inherit the mechanical property of fiber to the full extent, has good performance as shellproof.
Chinese patent CN1182012A discloses a kind of method that adopts polyethylene fibre to make ballistic resistant products, in this patent, earlier the multilayer superhigh molecular weight polyethylene fibers not being had latitude cloth applies 10t～20t pressure at 110 ℃～120 ℃ and carries out repeatedly pre-molding, and then the no latitude cloth of inciting somebody to action after the repeatedly precompressed is warmed up to 125 ℃～130 ℃, apply the pressure heat insulating pressurize typing of 200t, make Antiballistic shaped part after the cooling.Be not used to make shellproof and have good performance though there is latitude cloth, by the percentage elongation of no latitude cloth not as good as knitted fabric, thereby cause too late shellproof of making by knitted fabric of the performance of shellproof mitigation projectile impact making with no latitude cloth.
Therefore, need not only have good percentage elongation and but also be difficult for causing the method for the Antiballistic shaped part of non-penetrability wound a kind of can the preparation.
Summary of the invention
The technical problem that the present invention solves is, a kind of preparation method of Antiballistic shaped part is provided, and adopts the Antiballistic shaped part of this method preparation not only to have good percentage elongation, and is difficult for causing non-penetrability wound again.
In order to solve above technical problem, the invention provides a kind of preparation method of Antiballistic shaped part, comprise step:
A) will many no latitude cloth press layer and many looped fabrics stack backs to carry out pre-molding at 100 ℃～115 ℃ pressure that apply 1MPa～3MPa, described no latitude cloth is pressed layer and looped fabric comprises that intensity is at least the high-performance fiber that 15cN/dtex, modulus are at least 390cN/dtex;
B) the pre-molding spare that step a) is obtained carries out the hot-forming Antiballistic shaped part that obtains at 120 ℃～130 ℃ pressure that apply 10MPa～20MPa.
Among the present invention, described no latitude cloth is meant to be lined up high-performance fiber after the continuous band by even, parallel, straight and upright, selects suitable adhesive that it is carried out the continuous preimpregnation band that impregnation, drying obtain single orientation fibers.No latitude cloth herein presses layer to be meant many, and for example 2 or 4 no latitude cloth stack the hot-forming pressure layer that obtains, and when making no latitude cloth and pressing layer, multilayer need not had latitude cloth lamination, pressurizes then and finalizes the design.Described multilayer does not have latitude cloth and is at least two-layer, also can be for more than two-layer, when will not have latitude cloth lamination, fiber angulation in the adjacent no latitude cloth is 0 °～90 °, preferably, fiber angulation in the adjacent no latitude cloth is 45 °～90 °, and is preferred, and the fiber angulation in the adjacent no latitude cloth is 80 °～90 °.To obtain higher pliability in order reducing to rub, to press the two sides of layer to be compounded with smooth film at no latitude cloth.Smooth film can be high density polyethylene (HDPE) (HDPE), low density polyethylene (LDPE) (LDPE) or medium density polyethylene (MDPE), and preferred, smooth film is a low density polyethylene (LDPE).No latitude cloth can adopt the method for describing in the United States Patent (USP) 4457985,4748064,4916000,4403012,4623573,4737402,4916000 to prepare.
Knitted fabric as herein described is meant by fiber and forms coil by knitting motion clocklike, between coil and the coil mutually the string cover get up and the fabric that forms, can for single shafts such as the warp thread of routine is knitting to knitted fabric, also can be the knitted fabric of multiaxis to structure.Preferably, select the knitted fabric of multiaxis for use to structure.In the process of preparation knitted fabric, define a baseline and is 0 degree, its forms the longitudinal axis that fabric producer makes progress, and other fiber longitudinal axis therewith becomes the angle of non-zero, and preferably, other fiber is vertical with baseline.Herein, looped fabric is meant with knitted fabric and adhesive hot pressing the pressure layer that obtains after compound.
No latitude cloth presses the high-performance fiber in layer and the looped fabric to be meant that intensity is at least 15cN/dtex, modulus and is at least the fiber that 390cN/dtex, energy to failure are at least 28J/g.Preferably, fibre strength is at least that 20cN/dtex, modulus are at least 800cN/dtex, energy to failure is at least 35J/g.Preferred, fibre strength is at least that 28cN/dtex, modulus are at least 1200cN/dtex, energy to failure is at least 40J/g.Fiber in no latitude cloth and the knitted fabric can be inorfil or organic fiber, and inorfil can be glass fibre, ceramic fibre or carbon fiber; Organic fiber can be aramid fibre, terephthalamide fiber, liquid crystal polymer fibre, polybenzimidazoles ladder fibre (PBO), polyolefine fiber, vinal, polyacrylonitrile fibre (PAN).
The present invention presses layer and looped fabric to carry out pre-molding earlier many no latitude cloth, and then the hot-forming Antiballistic shaped part that obtains.In the group attack during Antiballistic shaped part, if press layer to contact with no latitude cloth earlier, the stress wave that produces can at first clear up a part, when bullet touches looped fabric, because looped fabric has very big elastic deformation amount, therefore can play the effect of " catching ", therefore to bullet, adopt the Antiballistic shaped part of the present invention's preparation to play the effect that gradient is protected, have excellent bulletproof effect for the impact of bullet.If bullet presses the engagement sequence of layer, knitted fabric cloth opposite with said sequence with no latitude cloth, also can play same gradient protective action.Preferably, looped fabric and no latitude cloth press layer alternately to place, and bullet is pressed at no latitude cloth under the alternating gradient protective action mechanism of layer and looped fabric in the process of impacting, and shellproof has significant more bulletproof effect.
Fiber in the no latitude cloth is preferably the linear polyethylene fiber, and the linear polyethylene fiber is meant the side chain that has in per 100 ℃ of atoms less than, in preferred per 300 carbon atoms less than 1 side chain.Preferred, the linear polyethylene fiber has super high molecular weight, and promptly the molecular weight of linear polyethylene fiber can be (1～7) * 10
6, preferred, the molecular weight of linear polyethylene fiber can be (1.5～4.5) * 10
6Superhigh molecular weight polyethylene fibers can prepare by for example gel spinning technology described in GB2042414A or the WO01/73173.Gel spinning technology is made up of following steps: preparation has the solution of the linear polyethylene of high intrinsic viscosity, this solution is spun into silk being higher than under the temperature of solution temperature, it is following producing gel that this silk is cooled to gelling temp, and remove desolvate before, during or later on drawn yarn to obtain superhigh molecular weight polyethylene fibers.
Fiber in the looped fabric is preferably aramid fiber, and the percentage by weight of aramid fiber in looped fabric is 60%～90%, and preferred, percentage by weight is 70%～86%, and is preferred, and percentage by weight is 72%～84%.
No latitude cloth press adhesive in layer and the looped fabric be instigate fiber be bonded together also can all or part of parcel fiber a kind of material, the adhesive that can select for use is a polymer matrix material.Preferably, adhesive is a thermoplastic, and the thermoplastic that can select for use is polyurethane, polyvinyl polymer, polyacrylic, polyolefin or thermoplastic elastomer block copolymer.Preferably, adhesive is selected from polystyrene triblock copolymer body (SIS, styrene-isoprene-phenylethene), as KARTON D-1107, KARTON D-1161, or hydrogenated polystyrene triblock copolymer body (SEBS, styrene-ethylene-butylene-styrene), as KARTON G-1650, KARTON D-1651.
No latitude cloth presses the adding form of adhesive in layer and the looped fabric can be solvent-borne type, 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 adhesive solvent, the weight ratio of adhesive and solvent is 10～40: 90～60, and preferred, the weight ratio of adhesive and solvent is 15～35: 85～65; Preferred, the weight ratio of adhesive and solvent is 20～30: 80～70.
Because the effect of adhesive mainly is that fiber is bonded together as bullet resistant material in no latitude cloth and the looped fabric, therefore should control gluing dosage suitable in no latitude cloth and the looped fabric.In no latitude cloth, the content of adhesive can be 10～30wt%, and preferred, the content of adhesive is 14～30wt%, and is preferred, and the content of adhesive is 16～28wt%, and is preferred, and the content of adhesive is 18～24wt%.In looped fabric, the content of adhesive is 10～30wt%, and is preferred, and the content of adhesive is 16～28wt%.
In order to reach better bulletproof effect, in shellproof, it is 1: 1～10: 1 that no latitude cloth is pressed the layer and the weight ratio of looped fabric, preferred, and it is 2: 1～5: 1 that no latitude cloth is pressed the layer and the weight ratio of looped fabric.According to the present invention, described Antiballistic shaped part can refer to individual protective equipments such as bulletproof halmet, flak jackets.
When making Antiballistic shaped part, after multilayer do not had latitude cloth and press layer and looped fabric stack, because can residual air between the lamination, air be overflowed after therefore at first applying the pressure of 0.1MPa～1MPa, preferred, apply 0.2MPa～1MPa air is overflowed.After air is overflowed, will not have again that latitude cloth is pressed layer and pressure that looped fabric is warming up to 100 ℃～115 ℃ of after-applied 1MPa～3MPa carries out pre-molding; Preferably, will not have and carry out pre-molding after latitude cloth presses layer and looped fabric to be warming up to 105 ℃～115 ℃.
Behind the pre-molding, again pre-molding spare is put into temperature and be pressure heat insulating pressurize 20min～60min that 120 ℃～130 ℃ hot pressing die applies 10MPa～20MPa, be cooled to room temperature then and obtain Antiballistic shaped part; Preferably, in hot pressing die pre-molding spare being applied 15MPa～20MPa carries out heat-insulation pressure keeping and obtains Antiballistic shaped part; Preferred, the temperature of hot pressing die is 125 ℃～130 ℃; Preferred, in hot pressing die, obtain Antiballistic shaped part behind heat-insulation pressure keeping 30min～60min.
Press the adhesive in layer and the looped fabric to combine with fiber more uniformly in order to make no latitude cloth, the present invention further provides behind pre-molding, to be placed on temperature be 120 ℃～130 ℃, pressure less than the vacuum condition of 0.5kpa insulation 20min～120min vacuum heat-preserving down with pre-molding spare, preferably, the temperature that vacuum heat-preserving is handled is 125 ℃～130 ℃, preferred, the pressure during application of vacuum is less than 0.2kpa.When pre-molding spare is at high temperature carried out application of vacuum, because adhesive has good flowability, therefore under high-temperature vacuum, help the interaction between reinforcing fibre and the adhesive, can reduce generation of defects such as hole, strengthen the bulletproof ability that no latitude cloth is pressed layer and looped fabric.When pre-molding spare is carried out application of vacuum, can be placed in the vacuum drying oven or vacuum drying oven in.After the processing of pre-molding spare vacuum heat-preserving, carry out follow-up hot-briquetting modeling process again.
According to the present invention, described Antiballistic shaped part can be individual protections such as bulletproof halmet or flak jackets equipment, and described hot pressing die can be the hot pressing die of preparation flak jackets, bulletproof halmet, armour.
The invention provides a kind of preparation method of Antiballistic shaped part.The present invention presses layer and looped fabric to carry out pre-molding many no latitude cloth earlier, and to be placed on temperature be 120 ℃～130 ℃ the interior hot-forming Antiballistic shaped part that obtains of mould to pre-molding spare then.Because no latitude cloth presses layer for clearing up the bullet performance, stop bullet to advance to have good shellproof effect, and the looped fabric good springiness has good effect for catching bullet, bullet through obstruction, captive gradient protective action after, kinetic energy can be cleared up.The Antiballistic shaped part of method preparation provided by the invention has good shellproof effect, can protect wearer to prevent to be subjected to the wound of bullet as bulletproof halmet or flak jackets.
The present invention further provides pre-molding spare is carried out the vacuum heat-preserving processing, adhesive in no latitude cloth and the knitted fabric at high temperature has good flowability, therefore can make the combination of fiber and adhesive more even, reduce defectives such as hole, improve shellproof ballistic performance.
Description of drawings
Fig. 1 is the schematic diagram of the Antiballistic shaped part of method preparation provided by the invention.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, but should be appreciated that these describe just to further specifying the features and advantages of the present invention, rather than to the restriction of claim of the present invention.
Embodiment 1
The fiber number of getting the production of Dutch DSM N. V. is the superhigh molecular weight polyethylene fibers of the Dyneema SK75 type (intensity is that 35cN/dtex, modulus are 1100cN/dtex) at 400 dawn, is 22% to be dissolved in solvent naphtha (2 No. 120 with KRATONG-1650 according to weight ratio, the 3-diacetyl), be 38g/m according to the compound surface density of making of the method among the patent US4916000 with above-mentioned fiber and adhesive as adhesive
2The no latitude cloth of single orientation.The weight ratio of fiber and adhesive is 88: 12 in the no latitude cloth.Be [0 °/90 °] with four layers of no latitude cloth according to fiber alignment again
2Mode stack, be placed on typing in the hot pressing die, for protection product and extraneous friction damage, the both sides of four layers of cloth are compounded with the LDPE diaphragm, hot pressing temperature is 100 ℃, briquetting pressure is 5MPa, constant temperature pressurize 15 minutes, making surface density is 160g/m
2Superhigh molecular weight polyethylene fibers do not have latitude cloth and press layer.
The fiber number of getting the production of company of Du Pont (DuPont) is the aramid fiber of 300 dawn Kevlar, 49 types (intensity is that 20.8cN/dtex, modulus are 780cN/dtex), has mile multiaxis of (liba) system on the warp thread knitting machine of weft yarn insertion system, use+45,-45 and three kinds of yarn systems of an angle of 90 degrees, it is 46g/m that described aramid fiber is processed into surface density
2Multiaxis to knitted fabric.Again multiaxis is flooded with above-mentioned adhesive to knitted fabric, be that 110 ℃, pressure are that typing obtains knitted fabric pressure layers under the condition of 5MPa in temperature then, the weight ratio of knitted fabric and adhesive is 87: 13, and obtaining multiaxis is 61g/m to the weight per unit area of knit goods pressure layer
2
Get 17 layers of no latitude cloth and press layer and 16 layers of fabric pressing layer, referring to Fig. 1, will not have latitude cloth and press layer 101 and knitted fabric pressure layers 102 alternately laminated placements, promptly the 2n-1 layer is pressed layer for no latitude cloth, and the 2n layer is a knitted fabric pressure layers, and the n here gets and is not more than 9 natural number.Be warming up to 115 ℃ of pressure that apply 2.5MPa after the pressure of pressing layer and looped fabric to apply 0.3MPa to the no latitude cloth that stacks is overflowed the air between the lamination and carry out pre-molding.
It is to be incubated 60min in 125 ℃ the vacuum drying oven that pre-molding spare is placed on temperature, and the vacuum of vacuum drying oven is 0.2kpa, after vacuum heat-preserving is handled pre-molding spare is cooled to room temperature and takes out.Again the application of vacuum part is placed on and is warming up to 125 ℃ of pressure heat insulating pressurize 30min that apply 16MPa in the hot pressing die, be cooled to room temperature and obtain armour.
Adopt America NI J101.04 flak jackets testing standard that this armour is carried out the ballistic performance test, when being subjected to 9mm (FMJ) type bullet (8g) impact, V
50Be 435m/s.
Embodiment 2
The fiber number of getting the production of Dutch DSM N. V. is Dyneema SK75 type (intensity is that 35cN/dtex, modulus the are 1100cN/dtex) superhigh molecular weight polyethylene fibers at 400 dawn, is 24% to be dissolved in No. 120 solvent naphthas and to make adhesive KRATON D-1107 according to weight ratio, with above-mentioned fiber and adhesive according to the embodiment 1 identical compound surface density of making of method be 40g/m
2The no latitude cloth of single orientation.The weight ratio of fiber and adhesive is 86: 14 in the no latitude cloth.Be that 0 °/90 ° mode stacks with two-layer no latitude cloth according to fiber alignment again; be placed on typing in the hot pressing die; for protection product and extraneous friction damage; the both sides of two layers of cloth are compounded with the LDPE diaphragm; hot pressing temperature is 105 ℃; briquetting pressure is 5MPa, constant temperature pressurize 20 minutes, and making surface density is 82g/m
2Superhigh molecular weight polyethylene fibers do not have latitude cloth and press layer.
The fiber number of getting the production of company of Du Pont (DuPont) is the Kevlar 49 type aramid fibers at 300 dawn, has mile multiaxis of (liba) system on the warp thread knitting machine of weft yarn insertion system, use+45,-45 and three kinds of yarn systems of an angle of 90 degrees, it is 46g/m that described aramid fiber is processed into surface density
2Multiaxis to knitted fabric, again multiaxis is flooded with above-mentioned adhesive to knitted fabric, be that 110 ℃, pressure are that typing obtains knitted fabric pressure layers under the condition of 6MPa in temperature then, the weight ratio of knitted fabric and adhesive is 87: 13, and obtaining the weight per unit area that multiaxis presses layer to knit goods is 60g/m
2
Get 27 layers of no latitude cloth and press layer and 26 layers of knitted fabric pressure layers, will not have latitude cloth and press layer and the alternately laminated placement of knitted fabric pressure layers, promptly the 2n-1 layer is pressed layer for no latitude cloth, and the 2n layer is a knitted fabric pressure layers, and the n here gets and is not more than 9 natural number.The pressure of pressing layer and looped fabric to apply 0.4MPa to the no latitude cloth that stacks is overflowed the air between the lamination, is warming up to 115 ℃ of pressure that apply 2.5MPa again and carries out pre-molding.
It is to be incubated 602min in 128 ℃ the vacuum drying oven that pre-molding spare is placed on temperature, and the vacuum in the vacuum drying oven is 0.18kpa.Be cooled to room temperature after vacuum heat-preserving is handled and pre-molding spare is taken out to be placed on be warming up to 127 ℃ of pressure heat insulating 30min that apply 16MPa in the hot pressing die, be cooled to room temperature and obtain armour.
Adopt the standard identical to carry out the ballistic performance test with embodiment 1, when this armour is subjected to 9mmFMJ type bullet (8g) impact, V
50Be 456m/s.
Embodiment 3
The fiber number of getting the production of Dutch DSM N. V. is Dyneema SK75 type (intensity is that 35cN/dtex, modulus the are 1100cN/dtex) superhigh molecular weight polyethylene fibers at 800 dawn, KRATON G-1650 is dissolved in No. 120 solvent naphthas as adhesive according to weight ratio 22%, with above-mentioned fiber and adhesive according to the compound surface density of making of embodiment 1 same procedure be 79g/m
2The no latitude cloth of single orientation.The weight ratio of fiber and adhesive is 88: 12 in the no latitude cloth.Be [0 °/90 °] with four layers of no latitude cloth according to fiber alignment again
2Mode stack, be placed on typing in the hot pressing die, for protection product and extraneous friction damage, the both sides of four layers of cloth are compounded with the LDPE diaphragm, hot pressing temperature is 100 ℃, briquetting pressure is 5MPa, constant temperature pressurize 15 minutes, making surface density is 332g/m
2Superhigh molecular weight polyethylene fibers do not have latitude cloth and press layer.
The fiber number of getting the production of company of Du Pont (DuPont) is the Kevlar 49 type aramid fibers at 300 dawn, has mile multiaxis of (liba) system on the warp thread knitting machine of weft yarn insertion system, use+45,-45 and three kinds of yarn systems of an angle of 90 degrees, it is 46g/m that described aramid fiber is processed into surface density
2Multiaxis to knitted fabric, again multiaxis is flooded with above-mentioned adhesive to knitted fabric, be that 115 ℃, pressure are that typing obtains knitted fabric pressure layers under the condition of 6MPa in temperature then, the weight ratio of knitted fabric and adhesive is 87: 13, and obtaining the weight per unit area that multiaxis presses layer to knit goods is 62g/m
2
Get 9 layers of no latitude cloth and press layer and 8 layers of fabric pressing layer, will not have latitude cloth and press layer and the alternately laminated placement of knitted fabric pressure layers, promptly the 2n-1 layer is pressed layer for no latitude cloth, and the 2n layer is a knitted fabric pressure layers, and the n here gets and is not more than 9 natural number.The pressure of pressing layer and looped fabric to apply 0.4MPa to the no latitude cloth that stacks is overflowed the air between the lamination, is warming up to 115 ℃ of pressure that apply 2.5MPa again and carries out pre-molding.
It is to be incubated 60min in 128 ℃ the vacuum drying oven that pre-molding spare is placed on temperature, the vacuum of vacuum drying oven is 0.18kpa, the insulation back is cooled to be placed on after room temperature is taken out pre-molding spare in vacuum drying oven and is warming up to 127 ℃ of pressure heat insulatings that apply 16MPa in the hot pressing die after 30 minutes, is cooled to room temperature and obtains armour.
With reference to America NI J0101.04 flak jackets testing standard this profiled member is carried out performance test, when being subjected to 9mm (FMJ) type bullet (8g) impact, V
50Be 410m/s.
Comparative example 1
Get Dyneema SK75 type (intensity is that 35cN/dtex, modulus the are 1100cN/dtex) superhigh molecular weight polyethylene fibers that Dutch DSM N. V. produces, is 23% to be dissolved in No. 120 solvent naphthas as adhesive with KRATON G-1650 adhesive according to weight ratio, with above-mentioned fiber and adhesive according to embodiment 1 in the compound surface density of making of method be 38g/m
2The no latitude cloth of single orientation, the weight ratio of fiber and adhesive is 88: 12 in the no latitude cloth.Be [0 °/90 °] with four layers of no latitude cloth according to fiber alignment again
2Mode stack, be placed on typing in the hot pressing die, for protection product and extraneous friction damage, the both sides of four layers of cloth are compounded with the LDPE diaphragm, hot pressing temperature is 100 ℃, briquetting pressure is 5MPa, constant temperature pressurize 15 minutes, making surface density is 160g/m
2Superhigh molecular weight polyethylene fibers do not have latitude cloth and press layer.
Be warming up to 115 ℃ of pressure that apply 2.5MPa after the pressure of pressing layer to apply 0.3MPa to 24 layers of no latitude cloth is overflowed the air of pressing between the layer and carry out pre-molding.Is that 125 ℃, pressure are the hot-forming profiled member that obtains of condition of 10MPa with pre-molding spare in temperature, with reference to America NI J0101.04 flak jackets testing standard this profiled member is carried out performance test, when being subjected to 9mm (FMJ) type bullet (8g) and impacting, and V
50Be 396m/s.
Comparative example 2
The multiaxis of Kevlar 49 type aramid fibers mile (liba) system that company of Du Pont (DuPont) is produced is processed into surface density on the warp thread knitting machine of weft yarn insertion system be 240g/m
2Multiaxis to knitted fabric, use+45 ,-45 and three kinds of yarn systems of an angle of 90 degrees.Again multiaxis is flooded with the adhesive in the comparative example 1 to knitted fabric, be that 110 ℃, pressure are that typing obtains knitted fabric pressure layers under the condition of 5MPa in temperature then, the weight ratio of knitted fabric and adhesive is 87: 13, and obtaining multiaxis is 275g/m to the weight per unit area of knit goods pressure layer
2
Be warming up to 115 ℃ of pressure that apply 2.5MPa after the pressure that 14 layers of knitted fabric pressure layers are applied 0.3MPa is overflowed the air of pressing between the layer and carry out pre-molding.Is that 122 ℃, pressure are the hot-forming Antiballistic shaped part that obtains of condition of 16MPa with pre-molding spare in temperature, with reference to America NI J0101.04 flak jackets testing standard this profiled member is carried out performance test, when being subjected to 9mm (FMJ) type bullet (8g) and impacting, and V
50Be 382m/s.
From above narration as can be seen, by with behind looped fabric and the no latitude cloth stack preparation Antiballistic shaped part, because no latitude cloth is pressed layer and the gradient protective action of knitted fabric pressure layers, the Antiballistic shaped part that method provided by the invention prepares has better ballistic performance.
The above only is a preferred implementation of the present invention; 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 make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1, a kind of preparation method of Antiballistic shaped part comprises step:
A) will many no latitude cloth press layer and many looped fabrics stack backs to carry out pre-molding at 100 ℃～110 ℃ pressure that apply 1MPa～3MPa, described no latitude cloth is pressed layer and looped fabric comprises that intensity is at least the high-performance fiber that 15cN/dtex, modulus are at least 390cN/dtex;
B) the pre-molding spare that step a) is obtained carries out the hot-forming Antiballistic shaped part that obtains at 120 ℃～130 ℃ pressure that apply 10MPa～20MPa.
2, method according to claim 1 is characterized in that also comprising pre-molding spare 120 ℃～130 ℃ steps of carrying out vacuum heat-preserving after the step a);
Described step b) is carried out the hot-forming Antiballistic shaped part that obtains for the pre-molding spare after vacuum heat-preserving is handled applies 10MPa～20MPa at 120 ℃～130 ℃.
3, method according to claim 1 and 2 is characterized in that pressing layer and many looped fabrics alternately to superpose described many no latitude cloth in the step a).
4, method according to claim 1 and 2, it is characterized in that not having latitude cloth, to press the weight ratio of layer and looped fabric be 1: 1～10: 1.
5, method according to claim 1 and 2 is characterized in that it is superhigh molecular weight polyethylene fibers that described no latitude cloth is pressed the high-performance fiber in the layer.
6, method according to claim 5, it is characterized in that accounting for no latitude cloth by superhigh molecular weight polyethylene fibers, to press the percentage by weight of layer be 85%～96%.
7, method according to claim 1 and 2 is characterized in that the high-performance fiber in the described looped fabric is an aramid fiber.
8, method according to claim 7 is characterized in that the percentage by weight that aramid fiber accounts for looped fabric is 60%～90%.
9, method according to claim 2, the time that it is characterized in that carrying out vacuum heat-preserving is 20min～120min.
10, method according to claim 1 and 2 is characterized in that described Antiballistic shaped part is bulletproof halmet, flak jackets or armour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810161475A CN101684991A (en) | 2008-09-27 | 2008-09-27 | Method for preparing bulletproof formed part |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810161475A CN101684991A (en) | 2008-09-27 | 2008-09-27 | Method for preparing bulletproof formed part |
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| CN101684991A true CN101684991A (en) | 2010-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810161475A Pending CN101684991A (en) | 2008-09-27 | 2008-09-27 | Method for preparing bulletproof formed part |
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| CN (1) | CN101684991A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315923A (en) * | 2014-10-28 | 2015-01-28 | 苏州苏月新材料有限公司 | Three-level soft bulletproof vest |
| CN104315922A (en) * | 2014-10-28 | 2015-01-28 | 苏州苏月新材料有限公司 | 4 to 6 level soft bulletproof vest |
| CN104534931A (en) * | 2014-11-21 | 2015-04-22 | 浙江立泰复合材料有限公司 | Bulletproof Polyethylene (PE) plate and production method thereof |
| CN114249038B (en) * | 2021-12-07 | 2023-05-05 | 南通中集翌科新材料开发有限公司 | Composite floor center sill and container |
-
2008
- 2008-09-27 CN CN200810161475A patent/CN101684991A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315923A (en) * | 2014-10-28 | 2015-01-28 | 苏州苏月新材料有限公司 | Three-level soft bulletproof vest |
| CN104315922A (en) * | 2014-10-28 | 2015-01-28 | 苏州苏月新材料有限公司 | 4 to 6 level soft bulletproof vest |
| CN104534931A (en) * | 2014-11-21 | 2015-04-22 | 浙江立泰复合材料有限公司 | Bulletproof Polyethylene (PE) plate and production method thereof |
| CN114249038B (en) * | 2021-12-07 | 2023-05-05 | 南通中集翌科新材料开发有限公司 | Composite floor center sill and container |
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