Antiballistic shaped part

Description: TECHNICAL FIELD [Detailed description of the invention]

Bulletproof molded product The present invention includes stacking composite layers that are not connected to each other, and each composite The material layer contains two or more single layers of fibers oriented in one direction in the matrix, and each single layer Fibers in bulletproof molding at an angle to adjacent single layer fibers Regarding goods. The present invention also describes a method for producing the molded product and protective clothing using the molded product. Also related to. Such articles are disclosed in WO89 / 01125, the patents of which are mostly mutually exclusive. Unlinked, high performance polyethylene fibers and at least 10% by weight polymer A composite bundle containing a matrix material is described. The drawback of conventional molded products is prevention The ratio between the energy absorption of the part and the weight of the part, which is a measure of the bullet level, is preferred. It is not. This has achieved some required level of protection This means that a relatively heavy part is needed. On the other hand, the weight of the molded product is small. As a result, the level of protection against ballistic impact of the molded product is relatively low. For many uses Therefore, articles that are as light in weight as possible and have the required level of protection are not. It's always important. For example, in the field of personal protection, such as clothing. apply. Similarly, for example in the case of application in automobiles, there is some required protection. It is important that the weight is as low as possible with respect to the protection level. An object of the present invention is a bulletproof product having a higher protection level at a certain weight than a known molded product. It is to provide a product. For this purpose, the fibers are aramid fibers or poly (p-phenylene benzobisoki). Elastomeric matrix of sazole) fibers with a composite layer of at most 10% by weight Each of the composite layers, including the material, is at most 800 g / m²Has a total weight of, and the fiber content of each monolayer Is 10 ~ 200g / m²Is achieved according to the present invention. Yet another advantage of the article according to the invention is that the ratio of protection level to areal density is preferred. As a result, the molded product has a wide range of applications in bulletproof products. It means that it will increase. As a result, the molded product is desired to have high flexibility. On the way, it becomes particularly suitable, for example, in protective clothing. Bulletproof articles can be used in products such as protective garments and automobile armor. A molded article that provides protection against ballistic impacts such as bullets and shrapnel. Book The bulletproof molded product according to the invention is a stack of composite material layers that are not connected to each other. including. However, a stack of composite layers that are not connected to each other remains as it is. Cannot be further processed. Coherence needed for further processing This is because it lacks toughness. In order to achieve this coherent property, the molded product is compared. Can be sewn together. But this is as few as possible, for example corners Just do it. Another possibility is to put the composite layer in a soft cover. That is, the composite layers in the part are still movable to each other, but are molded. The product itself has coherent properties. The composite layer is a layer composed of two or more single layers. Each monolayer is angled with respect to the adjacent monolayer below it, and the individual monolayers are mutually exclusive. It is connected to. Such an angle is the smallest surrounded by adjacent monolayer fibers. It means the rhinoceros horn and is 0 ° to 90 °. Preferably, the angle is 45 ° to 90 °. Is. Most preferably, the angle is 80 ° to 90 °. Adjacent single layer fiber Molded articles that form an angle with each other have relatively good bulletproof properties. single A layer means a layer in which unidirectionally oriented fibers are embedded in a matrix. Textile Wei is not only monofilament, but also multifilament thread or hula. Including tape. Fibers oriented in one direction are arranged essentially parallel to each other in a plane. Means the oriented fiber. A matrix is a fiber that binds to each other and the entire fiber. Or it means a substance that partially surrounds it. Matrix is other than elastomer material Can optionally include conventional polymeric fillers or other substances. Matri The x is uniformly distributed over the surface of the monolayer. Surprisingly, in the bulletproof molded article according to the present invention, the impact field due to the projectile Very high energy absorption, very high flexibility and good coffee of composite layer It is exactly the aramid fiber or poly (p-phenylembe) that gives the rent property. Nzobisoxazole) Fiber and very low content elastomeric matrix material Is the result of the combination with Was found. In order to obtain higher energy absorption, in the composite layer Selected so that the content of the elastomeric matrix material is as low as possible .. Preferably, the elastomeric layer of the composite material layer in the bulletproof molded product according to the present invention is used. The content of the Trix material is at most 7% by weight, more preferably at most 5% by weight. Shi However, a composite of sufficient fiber bonds to impart appropriate coherence to the composite layer A minimum amount (at least 1-2% by weight) of elas to ensure that it is present in the material layer A tomer matrix material must be used. Preferably, the elastomeric matrix material in the part has a tensile modulus (2). Contains thermoplastic elastomers (measured according to ASTM D638) at 5 ° C) less than 40Mpa .. By doing so, the matrix material has fiber-fiber bonds in the monolayer and Sufficient elasticity is provided for the desired flexibility in the resulting composite layer. Naru The elastomeric matrix material in the product is styrene-isoprene-styrene It has been found that the lock copolymer gives very good results. In certain embodiments of the invention, the article matrix according to the invention is elas. In addition to the tomer matrix material, it also contains 5-80% by volume of filler (elast). Calculated based on the total volume of the mar-shaped matrix material and filler). Better Or, the amount of filler is 10 to 80% by volume, most preferably 20 to 80% by volume. That As a result, the flexibility of the molded product It was found that sex increased without significantly adversely affecting bulletproof properties. The filler does not contribute to the interfiber bond, but the capacity of the interfiber matrix is rare. It contributes to the explanation, and as a result, the part is more flexible and absorbs more energy. Fu The iller preferably comprises a microdisperse of low weight or density. Filler is ki Body is fine, but using gas as a filler for processing matrix materials This causes practical problems. Fillers also include emulsifiers, stabilizers and binders, among others. Or it may contain substances commonly used in the production of dispersions, such as fine powders. Elastomeric if the matrix contains less than 80% by volume of filler The amount of matrix material is sufficient between the fibers with a constant total amount of matrix material. It turned out to be sufficient to achieve a good bond. Also, the matrix is 5% by volume It was also found that containing a larger amount of filler increased the flexibility of the part. Ta. Preferably, the separation layer is placed on one or both sides of the composite layer. The separating layer used is For example, Stamylex , which is a linear low density polyethylene, may be included. This embodiment has the advantage of relatively high flexibility of the part, especially stickiness. It is preferable to use the matrix material of. The separation layer is placed between the composite layers, A layer of specific material that is optionally attached to them, a composite layer of bulletproof articles. Is a layer that keeps them separated from each other. As for the molded product, the composite material layer from which the molded product is made is the most specific. If you have a large total weight, you will find that it has both high flexibility and good bulletproof properties. Was done. Good bulletproof properties, the total weight of the composite layer is at most 800g / m²The smell of molded products Was found. Each composite layer is 800g / m²Bulletproof articles with a total weight of less than ten It has good bulletproof properties as well as sufficient flexibility. Also, the composite layer preferably has a total weight of at least 50 g / m.²Also found to be Was done. The lower the total weight of the composite layers, the excessive stacking of the composite layers in the part. It becomes loose, resulting in insufficient coherence between the composite layers. In addition, the part is well bulletproof if the fiber content of each monolayer is within a certain range. It was found to have properties. Good bulletproof properties, single layer fiber content 10-200 g / m²Was found in articles that are. Single layer fiber content 10g / m²If smaller , The coherence achieved with a single layer is inadequate, and as a result, the single layer is actually Sufficient processing to receive subsequent processing processes such as molding of composite layer I can't. Fiber content in monolayer is 200g / m²If larger, the part is more flexible Smaller, lower SEA. Specific energy absorption (SEA) is energy absorption EA Means the value calculated by dividing by the areal density (AD) of the part. In addition, of the composite layer Given a certain total weight, minimize the number of single layers in the composite layer It was found that the molded product had good bulletproof properties. Yet another advantage of the bulletproof molded article according to the present invention is molding. Seen in applications where flexibility plays an important role in addition to product weight and protection level Is issued. Bulletproof moldings can be used in permanent and one-off flexibility applications. Permanently flexible use means that the part has continuous shape adjustment as a result of its use. It means the intended use, and examples thereof include bulletproof molded products in protective clothing. one A one-time flexibility application means an application in which an article is shaped into a particular shape only once. An example of this is adapting to a space that is not easily accessible, such as inside a car door. Examples include bulletproof molded products. Appropriate flexibility, protection level and weight of the part is specific to the total weight of the composite layer It was found to be achieved when having a maximum value. Preferably flexible forever The total weight of the composite layer of the molded product in the above application is at most 500 g / m.²And each single layer of fiber Content is 10 ~ 150g / m²Is. More preferably, the total weight of the composite layer is at most 300 g / m²so Yes, the fiber content of each single layer is 10 ~ 100g / m²Is. One-time flexibility applications with a total weight of at most 800g / m²And preferably 300 g / m²Molded articles composed of larger composite layers can be used. I mean, Desirable for this one-time flexibility application is that the applied shape is retained. This is because it has the minimum rigidity. More preferably, the total composite layer Weight is 400g / m²Larger, more preferably 500 g / m²Greater. Bulletproof articles are, in principle, known and suitable methods such as WO-95 / 00318 or It can be manufactured in accordance with US Pat. No. 4,623,574. Single layer is, for example, fiber , Preferably made of fibers in the form of continuous multifilament yarns, fibers Wei is guided across the comb from the bobbin frame. As a result, the fibers are flat Oriented in parallel at. Before or after being oriented parallel in a plane, the fibers Reacts in later steps in the manufacture of liquid materials or articles containing Trix material A liquid material containing a precursor that provides a polymer matrix material with the desired modulus of elasticity. Is coated with a certain amount. Precursors are monomers, oligomers or crosslinkable polys. Means Ma. The liquid material can be a solution, dispersion or melt. When a large number of monolayers are crossed at an angle of preferably about 90 ° and overlapped with each other, the plaque A composite layer is formed at the roses. Preferably, this is a matrix material Allows flow between fibers and attaches to single layers of fibers below and / or above Achieved by increasing temperature and / or pressure. Solution or dispersion When using Trix material, the step of forming a single layer into a composite layer is solvent or minute. Also includes evaporation of powder. The composite layers are then stacked to produce a molded product, if desired. The separation layer is applied to the composite layer or placed between the composite layers. Single layers, 800-250, in terms of obtaining the required low matrix content Has a 0 denier thread count, d Moistened with a dispersion of elastomeric matrix material and any filler It is very advantageous to use the method produced by aramid yarn. Thread count Yarns larger than 800 denier absorb relatively much matrix material from the dispersion Few. Preferably, the count is greater than 1000 denier, more preferably 1200 denier. Greater than Neil, most preferably greater than 1500 denier. I like the thread count It is lower than 2500 denier. Because this is easier to spread on a single layer surface is there. As identified above, the dispersions are preferably elastomeric materials and materials. Ra is included in a weight ratio of 20:80 to 95: 5. As a result, very low matrix material It was found that a very uniform distribution of the matrix was obtained due to the content. Preferably, an aqueous dispersion is used. Aqueous dispersions have a low viscosity, so they are matri. The material is very evenly distributed throughout the fiber, resulting in a good and homogeneous fiber. It has the advantage that fibrous binding is achieved. Yet another advantage is the dispersant water Is non-toxic and can therefore be evaporated outdoors. the goal As well as in terms of obtaining a uniform distribution with a low percentage of matrix Or the dispersion is a solid component (elastomer) of 30-60% by weight based on the total weight of the dispersion. Includes a matrix material and any filler present). The bulletproof molded article according to the present invention obtained according to the method specified above is preferable. Is an FMJ 9mm bullet (8g) At least 190 Jm when shot in²Has a / kg SEA. Bullet or shrapnel opposition Energy absorption (EA) at the time of shooting is speed V₅₀Bullet or shrapnel dynamic energy Calculated from. V₅₀Has a 50% chance that a bullet or shrapnel will penetrate the ballistic structure It is the speed at a certain time. The present invention will be described with reference to the following examples, but the present invention is limited to the following examples. It's not something. Example I Comb the Twaron 2000 thread with a count of 1680 dtex from the bobbin frame Guide through and moisten with an aqueous dispersion of the matrix material Kraton D11O7 A single layer was produced by allowing it to grow. The yarns are oriented parallel in a plane and of a single layer of yarn Weight is 50.4g / m²Met. The composite layer is stacked by crossing four single layers, and Stam Ylex Separation Layer is applied and the monolayer and separation layer are subjected to pressure 0.5Mpa and temperature 90 ° C. Manufactured by solidifying into one. The total weight of the composite layer is 252g / m²Met. composite The material layer is 8.0% by weight elastomer-material and 3.5% by weight filler (total of composite layer) Included (based on weight). A flat part is made from 15 loosely stacked composite layers without bonding. , The corners of the molded product were sewn together. V at the time of impact of 9mm FMJ (8g) type bullet₅₀Is 4 30m / s, SEA is 195 Jm²It was / kg. Example II Twaron 2000 thread with a count of 1680 dtex Guided from the bin frame through the comb, matrix material Kraton D1 A monolayer was produced by moistening with 107 aqueous dispersions. Threads are parallel in a plane The weight of the single layer yarn is 50.4g / m.²Met. Composite layer, 4 single layers crossed Plug and stack, apply Stamylex Separation Layer, Pressure Single Layer and Separation Layer Manufactured by solidifying at 0.5 MPa and 90 ° C temperature. The total weight of the composite layer is 236g / m²Met. Composite layer is 3.7% by weight elastomer-material and 1.6% by weight It contained a filler (based on the total weight of the composite layer). A flat part is made from 11 unbonded, loosely stacked composite layers. , The corners of the molded product were sewn together. V at the time of impact of 9mm FMJ (8g) type bullet nine₅₀Is 3 75m / s, SEA 220Jm²It was / kg. Comparative example A Comb the Twaron 2000 thread with a count of 1680 dtex from the bobbin frame Guide through and moisten with an aqueous dispersion of the matrix material Kraton D1107 A single layer was produced by allowing it to grow. The yarns are oriented parallel in a plane and of a single layer of yarn Weight is 50.4g / m²Met. The composite layer is stacked by crossing four single layers, and Stam Ylex Separation Layer is applied and the monolayer and separation layer are pressured at 0.5 MPa and temperature 90 ° C. Manufactured by solidifying into one. The total weight of the composite layer is 236g / m²Met. composite The material layer is 20% by weight elastomer material and 5.0% by weight filler (total of composite material layer). Based on weight Included). A flat part is made from 15 loosely stacked composite layers without bonding. , The corners of the molded product were sewn together. V at the time of impact of 9mm FMJ (8g) type bullet₅₀Is 4 31m / s, SEA is 176Jm²It was / kg. Is the flexibility of the flat part significantly lower than the flexibility of the flat part of Example I? It was.