Classifications

• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
  • D02G3/44—Yarns or threads characterised by the purpose for which they are designed
  • D02G3/442—Cut or abrasion resistant yarns or threads
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
  • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F41—WEAPONS
  • F41H—ARMOUR; ARMOURED TURRETS; ARMOURED OR ARMED VEHICLES; MEANS OF ATTACK OR DEFENCE, e.g. CAMOUFLAGE, IN GENERAL
  • F41H5/00—Armour; Armour plates
  • F41H5/02—Plate construction
  • F41H5/04—Plate construction composed of more than one layer
  • F41H5/0471—Layered armour containing fibre- or fabric-reinforced layers
  • F41H5/0485—Layered armour containing fibre- or fabric-reinforced layers all the layers being only fibre- or fabric-reinforced layers
• • D—TEXTILES; PAPER
  • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
  • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
  • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
  • D10B2331/021—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides aromatic polyamides, e.g. aramides
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
  • Y10T442/3065—Including strand which is of specific structural definition
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/40—Knit fabric [i.e., knit strand or strip material]
  • Y10T442/425—Including strand which is of specific structural definition

Definitions

• the invention relates to penetration-resistant textile fabrics and articles comprising the fabrics.
• Penetration inhibitors i. Protection against attacks with shot, puncture and
• Explosive weapons offering textile fabrics are known.
• the attack with firearms can be done with spherical or splinter-shaped ammunition, so that a penetration-inhibiting textile fabric should cause at least bullet and splinter protection.
• a penetration-inhibiting textile fabric should cause at least bullet and splinter protection.
• explosive weapons it depends on the splinter protection effect of the penetration-inhibiting textile fabric used. Therefore, there has long been a need for penetration-resistant textile fabrics with ball and splinter protection, which has recently created an increasing need for penetration-inhibiting textile fabrics, which have an improved splinter protection effect with the same ball protection.
• the object of the present invention is to provide penetration-inhibiting textile fabrics which have an improved splinter protection effect with the same ball protection.
• the object is achieved by a penetration-inhibiting textile fabric (I) comprising at least one untwisted Hoch Strukturfi- lamentgarn with a measured according to ASTM D-885 without rotation breaking strength of at least 1 100 MPa, which is characterized in that the high-performance filament yarn is a high-performance filament yarn increased in volume, that the textile fabric (I) comprising the volume-increased high-performance filament yarn has a relative compressibility measured according to DIN 53885 (October 1997), to determine the initial thickness with a measurement pressure of 0.5 N.
• the relative compressibility being greater by a factor f, which has a value in the range of 1.2 to 5, than the relative compressibility of a textile comparative sheet, the production of which differs from the production of the penetration-inhibiting textile fabric (I) only in that the high-performance filament yarn of the comparative textile fabric is not increased in volume.
• That the production of the o.g. textile comparison fabrics of the preparation of the penetration-inhibiting textile fabric (I) according to the invention only differs in that the high performance filament yarn of the textile comparison sheet is not increased in volume means in the present invention that in the preparation of the textile comparison sheet the same filament-forming starting material, ie. the same filament-forming polymer having the same molecular weight, by the same spinning method is spun into a high-performance filament yarn as in the preparation of the penetration-inhibiting textile fabric (I) according to the invention.
• the high-performance filament yarn used for producing the penetration-inhibiting textile comparative sheet is not increased in volume and processed in the same manner as in the preparation of the penetration-inhibiting textile fabric (I) according to the invention to the comparative textile fabric.
• the penetration-inhibiting textile fabric (I) according to the invention with the same ball protection is characterized by an improved splinter-protection effect.
• the inventively indispensable increase in volume of the high performance filament yarn used in the penetration-inhibiting textile fabric (I) according to the invention is accompanied by a significant deterioration of the mechanical properties of the yarn in the form of a decrease in the breaking strength of the yarn, for example by 20%, and the elongation at break of the yarn , eg by 1 1%.
• the ball and splinter protection of a fabric comprising such a yarn would also decrease drastically.
• the penetration-inhibiting textile fabric (I) according to the invention is surprisingly distinguished by an improved stab-protection effect, which is all the more surprising in view of the above-described marked deterioration of the mechanical properties of the high-performance filament yarn in its volume increase.
• the penetration-inhibiting textile fabric (I) comprises a high performance filament yarn having a tenacity of at least 2000 1700 MPa (120 cN / tex) measured according to ASTM D-885 without rotation distribution, more preferably of at least 3000 2160 MPa (150 cN / tex).
• the high-performance filament yarn is selected from the group consisting of aramid filament yarns, polybenzoxazole filament yarns, polybenzothiazole filament yarns and thermoplastic filament yarns such as liquid crystalline polyester filament yarns or a blend of Any artwork at least two of the aforementioned filament yarns.
• the high-performance filament yarn is selected from the group consisting of aramid filament yarns or polybenzoxazole filament yarns only or only polybenzothiazole filament yarns or only thermoplastic filament yarns such as polyester liquid-crystalline filament yarns are.
• the high-performance filament yarn can also consist of a mixture of aramid filament yarns having polybenzoxazole and / or polybenzothiazole and / or thermoplastic filament yarns, such as, for example, liquid-crystalline polyester filament yarns.
• the high-performance filament yarn can also consist of a mixture of polybenzoxazole and polybenzothiazole filament yarns.
• aramid filament yarns mean filament yarns made from aramids, i. are prepared from aromatic polyamides wherein at least 85% of the amide (-CO-NH-) bonds are bonded directly to two aromatic rings.
• An aromatic polyamide particularly preferred for the present invention is poly-para-phenylene terephthalamide, a homopolymer resulting from the mol: mol polymerization of para-phenylenediamine and terephthalic acid dichloride.
• polybenzoxazole filament yarns and polybenzothiazole filament yarns mean filament yarns made from polybenzoxazoles or from polybenzothiazoles, ie from polymers having the structural units shown below, in which the aromatic groups bonded to the nitrogen are preferably carbocyclic, as in US Pat Structural units shown. However, said groups may also be heterocyclic. Further, the nitrogen-bonded aromatic groups are preferably six-membered rings as shown in the structural units. However, said groups may also be formed as fused or unfused polycyclic systems.
• the penetration-inhibiting textile fabric (I) according to the invention has high-performance filament yarns with a single-filament denier in the range from 0.4 dtex to 3.0 dtex, particularly preferably in the rich from 0.7 dtex to 1, 5 dtex and in particular in the range of 0.8 dtex to 1, 2 dtex.
• the inventive peteretration-inhibiting textile fabric (I) comprises high-performance filament yarns having a yarn denier in the range from 100 dtex to 6000 dtex, more preferably in the range from 210 dtex to 3360 dtex and in particular in the range from 550 dtex to 1680 dtex on.
• the penetration-inhibiting textile fabric (I) according to the invention is preferably a woven fabric, a knitted fabric, a knitted fabric or a unidirectional or multiaxial fabric.
• the penetration-inhibiting textile fabric (I) according to the invention can be a fabric double layer.
• the structure of such tissue double layers is described in WO 02/075238.
• the penetration-inhibiting textile fabric (I) according to the invention is a fabric
• the fabric preferably has a linen, twill or satin weave or its derivatives or combinations.
• the penetration-inhibiting textile fabric (I) according to the invention can be prepared from the volume-enlarged high-performance filament yarn, e.g. with a bar rapier weaving machine, a band rapier weaving machine, a projectile weaving machine, an air-jet weaving machine or a water jet loom.
• the penetration-inhibiting textile fabric (I) according to the invention is a knitted fabric
• the knitted fabric is preferably designed such that the threads according to the invention run parallel to one another in at least one of the possible yarn directions and through a stitch-forming binding thread system with at least one thread, with preferably low weight and volume fraction of the knitted or knitted fabric to be fixed.
• the at least two layers of parallel high-performance filament yarns of the type described above are preferably connected to one another by a stitch or stitch-forming binding thread system with at least one thread, preferably with a low weight and volume fraction relative to the multi-axial layer.
• the penetration-inhibiting textile fabric (I) according to the invention comprises a high-performance filament yarn of the type described above, characterized in that the high-performance filament yarn is a high-volume, high-volume filament yarn.
• the increase in volume of the high-performance filament yarn can in principle be brought about by any method capable of increasing the volume of the high-performance filament yarn used according to the invention to such an extent that the penetration-inhibiting textile fabric (I) according to the invention, which comprises the volume-increased high-performance filament yarn comprises a relative compressibility measured in the above-described manner according to DIN 53885 (October 1997), which is greater by a factor f, which has a value in the range of 1, 2 to 5, than the relative compressibility of a comparative textile fabric whose Production differs from the production of the penetration-inhibiting textile fabric (I) according to the invention only in that the high-performance filament yarn of the comparative textile fabric is not increased in volume.
• the volume-increased high-performance filament yarn comprises high-performance filaments - preferably aramide filaments, polybenzoxazole filaments, polybenzothiazole filaments, liquid-crystalline polyester filaments or a mixture of at least two of the above-mentioned filaments and shrunken filaments, such as polyacrylonitrile filaments.
• the high-performance filaments and shrinkable filaments such as drawn polyacrylonitrile filaments, are mixed, made into a mixed filament yarn, and the mixed filament yarn
• the high-performance filament yarns do not shrink on their own, shrinkage of the shrinkable filaments results in an increase in volume, resulting in the desired volume-increased high-performance filament yarn.
• Knitting texturing means that the high-performance filament yarn used is fed to a circular knitting machine, for example with a diameter of 1 to 50 inches, with a fineness of preferably 5 to 20 gauge and the resulting tube is passed twice for a time in the range of 10 to 60 minutes at a temperature of> 100 ° C in water vapor, for example in an autoclave, treated and separated again.
• the knit-textured yarn thus treated has a wave-like structure thereafter even if the high-performance knit-textured filament yarn is a knit-textured aramid filament yarn. The latter is surprising to a person skilled in the art because it has hitherto been assumed that aramid filament yarns can not be textured.
• the penetration-inhibiting textile fabric (I) has a measured in the manner described above according to DIN 53885 (October 1997). relative compressibility, which is greater by a factor f, which has a value in the range of 1.2 to 5, than the relative compressibility of a comparative textile sheet whose production depends on the preparation of the penetration-inhibiting textile fabric (I) according to the invention. only differs in that the high performance filament yarn of the textile comparison sheet is not increased in volume.
• the penetration-inhibiting textile fabric (I) according to the invention surprisingly exhibits an improved splinter protection effect with the same ball protection and, in addition, an improved puncture protection effect. If f is smaller than 1, 2, the above-mentioned property combination is not observed. If f is greater than 5, there are structures whose low degree of orientation in the fiber longitudinal direction leads to a significant decrease in the energy dissipation required for ball protection.
• the factor f has a value in the range of 1.4 to 4 and in a particularly preferred embodiment a value in the range of 1.6 to 3.0.
• the article (AI) according to the invention i) is a helmet, a vehicle armor, a ceramic composite panel or other protective structure which is reinforced by means of resin matrices, or
• an anti-fragmentation mat e.g. a bulletproof vest, an anti-shatter vest, a puncture resistant vest or a combination of at least two of the said articles, e.g. a combined bullet and shatter-proof vest.
• the article (AI) according to the invention is a combined ball, splinter and stab protection vest.
• a penetration-inhibiting textile fabric (II) comprising at least one untwisted high-performance filament yarn having a measured according to ASTM D-885 without rotation distribution strength of at least 1 100 MPa, which is characterized in that the textile Sheet (II) is a volume-increased textile fabric to the extent that the volume-expanded fabric has a measured according to DIN 53885 (October 1997) relative compressibility, to determine the initial thickness with a measurement pressure of 0.5 N / cm 2 and the final thickness measured with a measuring pressure of 5 N / cm 2 , the relative compressibility by a factor f, which has a value in the range of 1, 2 to 5, greater than the relative compressibility of a textile comparison sheet, which is different from the volume-increased textile Fabrics only differs in that it is not increased in volume.
• the textile Sheet (II) is a volume-increased textile fabric to the extent that the volume-expanded fabric has a measured according to DIN 53885 (October 1997) relative compressibility, to determine the initial thickness
• the abovementioned comparative textile fabric differs from the penetration-inhibiting textile fabric (II) according to the invention only in that in the context of the present invention, it means that the same filament-forming starting material, ie, for example, the same filament-forming polymer having the same molecular weight, is spun into a high-performance filament yarn by the same spinning process during the production of the textile comparative sheet and subsequently processed in the same way as in the preparation of the penetration-inhibiting textile fabric (II) according to the invention to the textile comparison sheet, but wherein the textile comparison sheet is not increased in volume.
• the same filament-forming starting material ie, for example, the same filament-forming polymer having the same molecular weight
• the penetration-inhibiting fabric (II) comprises a high performance filament yarn having a tenacity measured in accordance with ASTM D-885 of at least 1700 MPa (120 cN / tex), more preferably at least 2160 MPa (150 cN / tex).
• the high performance filament yarn is selected from the group consisting of aramid filament yarns, polybenzoxazole filament yarns, polybenzothiazole filament yarns, and thermoplastic filament yarns such as spun yarns.
• liquid crystalline polyester filament yarns or consists of a mixture of at least two of the aforementioned filament yarns.
• the penetration-inhibiting textile fabric (II) according to the invention has high-performance filament yarns with a single-filament denier in the range from 0.4 dtex to 3.0 dtex, more preferably in the range from 0.7 dtex to 1.5 dtex, and in particular ranging from 0.8dtex to 1.2 dtex.
• the penetration-inhibiting textile fabric (II) comprises high-performance filament yarns having a yarn denier of 100 dtex to 6000 dtex, more preferably in the range of 210 dtex to 3360 dtex and in particular in the range of 550 dtex to 1680 dtex.
• the volume-increased penetration-inhibiting textile fabric (II) according to the invention is preferably a woven fabric, a knitted fabric, a knitted fabric, a unidirectional or a multiaxial fabric. Furthermore, the penetration-inhibiting textile fabric (II) according to the invention can be a fabric double layer. The structure of such tissue double layers is described in WO 02/075238.
• the volume-enlarged penetration-inhibiting textile fabric (II) according to the invention is a woven fabric
• the woven fabric preferably has a linen, twill or satin weave or its derivatives and combinations.
• the knitted fabric is preferably designed such that the threads according to the invention run parallel to each other in at least one of the possible yarn directions and through a stitch forming binder thread system with at least one thread , preferably with low weight and volume fraction of the knitted fabric or
• Knitted fabric to be fixed.
• the at least two layers of parallel high-performance filament yarns of the type described above are preferably connected to one another by a stitch-forming or binding seam system having at least one thread, preferably with a low weight and volume fraction relative to the multi-axial layer.
• the penetration-inhibiting textile fabric (II) according to the invention is characterized in that it has a volume-increased penetration-inhibiting textile fabric is.
• the volume increase of the textile fabric can in principle be brought about by any method capable of increasing the volume of the textile fabric used according to the invention to such an extent that the penetration-inhibiting textile fabric according to the invention has a structure according to DIN 53885 (October 1997) has a relative compressibility which is greater by a factor f having a value in the range of 1.2 to 5 than the relative compressibility of a fabric which differs from the volume-increased fabric only in that that it is not increased in volume.
• a suitable method of increasing the volume is e.g. the shrinking.
• a penetration-inhibiting fabric is used for this purpose which, in addition to the high-performance filament yarn described above, comprises a shrinkable yarn, e.g. a stretched polyacrylonitrile, contains, which causes the increase in volume of the penetration-inhibiting textile fabric used in the initiation of shrinkage by its shrinkage, whereby an inventive volume-increased penetration-inhibiting textile fabric (II) is formed.
• a shrinkable yarn e.g. a stretched polyacrylonitrile
• the volume-expanded fabric (II) is a sheet which, in addition to the high-performance filament yarn, is a shrunk yarn, e.g. a shrunken polyacrylonitrile yarn.
• the penetration-inhibiting textile fabric (II) has a relative compressibility measured in the manner described above according to DIN 53885 (October 1997), which is greater than that by a factor f which has a value in the range of 1.2 to 5 relative compressibility of a comparative textile sheet, which differs from the volume-increased fabric in that it is not increased in volume.
• the penetration-inhibiting textile fabric (II) according to the invention with the same ball protection an improved splinter protection effect and additionally an improved stab protection effect. If f is smaller than 1, 2, the above-mentioned property combination is not observed. If f is greater than 5, there are structures whose low degree of orientation in the fiber longitudinal direction leads to a significant decrease in the energy dissipation required for ball protection.
• the factor f has a value in the range from 1.4 to 4 and in a particularly preferred embodiment a value in the range from 1.6 to 3.0.
• the article (All) according to the invention i) a helmet, a vehicle armor, a ceramic composite panel or other protective structure, which is reinforced by means of resin matrices, or ii) a splinter protection mat, a bulletproof vest, a splinter protection vest, a puncture resistance vest or a combination of at least two of said articles, such as a combined bullet and shatter resistant vest.
• the article according to the invention (All) is a combined ball, splinter and puncture resistance vest.
• Breaking strength and elongation at break are measured according to ASTM D-885, but without rotation.
• the relative compressibility of the fabric is measured according to DIN 53885 (October 1997) with the difference that the initial thickness is determined with a measurement pressure of 0.5 N / cm 2 and the final thickness with a measurement pressure of 5.0 N / cm 2 .
• the poly-para-phenylene terephthalamide filament yarn is fed to a circular knitting machine having a diameter of 3.5 inches and a gauge of 13 gauge, and the resulting tube is two for 30 minutes 120 ° C treated in water vapor and separated again.
• the knit-textured yarn thus treated has a wave-like structure.
• the breaking strength of the poly-para-phenylene-terephthalamide filament yarn deteriorates to 160 cN / tex (2240 MPa), i. by 20%, and the elongation at break to 2.66%, i. at 11 %.
• the knit-textured poly-para-phenylene-terephthalamide filament yarn having a thread density of 8.5 cm per cm in warp and weft on a bar rapier weaving machine, becomes a canvas fabric having a basis weight of
• the fabric composed of the knit-textured poly-para-phenylene-terephthalamide filament yarn has a relative compressibility of 28.3%.
• 16 layers of the fabric consisting of the knit-textured poly-para-phenylene-terephthalamide filament yarn are stacked into a package in the raw state, ie without removal of the finish by, for example, a washing process and without application of a water-repellent finish.
• the package is moisture conditioned at a temperature of 20 ° C for 20 hours at a relative humidity of 65% and has a basis weight of 2.6 kg / m 2 .
• the moisture-conditioned package is bombard- ed with fragmentation projectiles in accordance with STANAG 2920 (1, 1 g splitter) and the v 50 (splitter) value, ie the projectile velocity at which 50% of all shots are held, is determined.
• the value of v 5 o (splinter) is 483 m / s (see Table 1). Comparative Example 1
• the fabric consisting of the untextured poly-para-phenylene terephthalamide filament yarn has a relative compressibility of 12.5%.
• Example 16 layers of unprocessed poly-para-phenylene terephthalamide filament yarn unprocessed fabric are layered into a package and moisture conditioned as in Example 1.
• the package has a basis weight of 2.6 kg / m 2 .
• the moisture-conditioned packet is determined as in Example 1 v 50 (splitter).
• the value of v 50 (splinter) is 453 m / s (see Table 1).
• the breaking strength of the poly-para-phenylene-terephthalamide filament yarn deteriorates to 160 cN / tex (2240 MPa), ie, 20%, and the elongation at break to 2.66%, ie, 1 1%.
• the knit-textured poly-para-phenylene-terephthalamide filament yarn is made into a fabric as in Example 1.
• the fabric composed of the knit-textured poly-para-phenylene-terephthalamide filament yarn has a relative compressibility of 28.3%.
• Twenty-six layers of the fabric consisting of the knit-textured poly-para-phenylene-terephthalamide filament yarn are piled up in a raw state, ie, without removal of the finish by, for example, a washing process and without application of a water-repellent finish.
• the package is moisture conditioned at a temperature of 20 ° C for 20 hours at a relative humidity of 65% and has a basis weight of 4.25 kg / m 2 .
• the moisture-conditioned package is bombarded with 9mm DM 41 balls and the
• v 50 (sphere) value determined.
• the value of v 50 (sphere) is 473 ⁇ 10 m / s. (see Table 1).
• the fabric consisting of the untextured poly-para-phenylene terephthalamide filament yarn has a relative compressibility of 12.5%.
• Example 2 Twenty-six layers of the fabric consisting of the untextured poly-para-phenylene terephthalamide filament yarn are piled into a package and as in Example 2 moisture conditioned. On the moisture-conditioned package, the v 50 (sphere) value is determined as in Example 2. The value of v 50 (sphere) is 478 ⁇ 6 m / s (see Table 1).
• Table 1 shows that the knitted-textured yarn according to the invention with equal ball protection (compare Example 2 with Comparative Example 2) has splinter protection which is 6.6% higher in comparison to non-textured yarn (compare Example 1 with Comparative Example 1) ).
• Example 2 Twenty-five layers of a knit-textured poly-para-phenylene-terephthalamide filament yarn fabric as prepared in Example 1 are piled up in a raw package.
• the package is moisture conditioned as in Example 1 and has a basis weight of 4.1 kg / m 2 .
• the package will undergo a puncture resistance test in accordance with the "Home Office Scientific Development Branch (HOSDB) Body Armor Standards for UK police (2007), Part 3: Knife and Spike Resistance" P1 B-blade, which is described in the aforementioned standard on page 6, chapter 5.3, Fig. 2 and on page 21.
• the package to be tested is placed on an elastic foam of 66 mm thickness.
• the foam simulates the human body.
• the foam lies on a metal plate. That on the
• Foam-lying package to be tested is bribed with the above-identified P1 B-knife, which has a certain kinetic energy. Then the penetration depth of the knife into the foam is measured. The depth of penetration into the foam simulates the depth at which the blade would penetrate into the body of the attacked during a knife attack with a certain energy of the knife.
• Table 2 shows that when the package of Example 3 of the knitted textured filament yarn fabric layers of the present invention were kneaded at a kinetic energy of the knife of 10.2 joules, the penetration depth of the knife into the foam was only 7 mm, while at the same kinetic energy of the knife the bribing of the package of Comparative Example 3 from fabric layers of non-textured filament yarn results in a penetration of 32 mm into the foam.
• Table 2 also shows that when the package of Example 3 of the knitted textured filament yarn fabric layers of the invention were knitted at 36 joule kinetic energy, the knife penetration into the foam was only 16 mm, while at the same kinetic energy of the knife Corrugation of the package of Comparative Example 3 from fabric plies of non-textured filament yarn results in complete penetration of the foam so that the knife strikes the metal plate on which the foam rests.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Ceramic Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Woven Fabrics (AREA)
• Knitting Of Fabric (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Laminated Bodies (AREA)
• Manufacturing Of Multi-Layer Textile Fabrics (AREA)

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