阅读说明：本技术 具有不连续中间层的多轴织物 (Multiaxial fabric with discontinuous intermediate layer ) 是由 J·雷拜因 V·里希特 R·沃卡茨 于 2020-04-28 设计创作，主要内容包括：本发明涉及一种具有至少两个线层和至少一个非织造层的多轴织物。每个线层由彼此平行布置并且在线层内彼此相邻地布置的复丝增强纱制成,其中至少一个线层至少部分地与非织造层直接接触,并且切口部分在非织造层内提供,所述切口部分的尺寸为至少4mm～(2)。本发明还涉及一种具有多轴织物的纤维增强复合材料。(The invention relates to a multiaxial fabric having at least two thread layers and at least one nonwoven layer. Each thread layer is made of multifilament reinforcing yarns arranged parallel to each other and adjacent to each other within the thread layer, wherein at least one thread layer is at least partially in direct contact with the nonwoven layer, and cut-out portions are provided within the nonwoven layer, the cut-out portions having a size of at least 4mm 2 . The invention also relates to a fibre-reinforced composite material with a multiaxial fabric.)

1. Multiaxial uncrimped fabric having at least two thread layers and at least one nonwoven layer (1), wherein each thread layer is formed by multifilament reinforcing yarns arranged parallel to one another and adjacent to one another adjoining one another within the thread layer, wherein at least one thread layer is at least partially in direct contact with the nonwoven layer (1), characterized in that an incision (7) is provided in the nonwoven layer (1), wherein the incision has a diameter of at least 4mm²And the non-woven layer (1) is a layer which is discontinuous at least due to the incisions (7).

2. Multiaxial non-crimp fabric according to claim 1, wherein the incisions (7) are arranged regularly or randomly irregularly in the nonwoven layer (1).

3. Multiaxial non-crimp fabric according to at least one of the preceding claims, wherein the incisions (7) have the same or different shapes and/or sizes.

4. Multiaxial non-crimp fabric according to at least one of the preceding claims, wherein the non-woven layer (1) has an electrically conductive material, wherein the electrically conductive material is applied and introduced into the non-woven layer (1) by means of powder and/or granules and/or the non-woven layer (1) has electrically conductive fibers.

5. Multiaxial non-crimp fabric according to at least one of the preceding claims, wherein the non-woven layer (1) has a binder, preferably with a particle size of 50-160 μm and/or the non-woven layer (1) has a thickness of less than 40 μm.

6. Multiaxial non-crimp fabric according to any one of claims 1 to 4, wherein the non-woven layer (1) has 70% of continuous fibers having a fiber length of more than 20m and/or the non-woven layer (1) has 70% of short fibers having a fiber length of 8-15 mm.

7. Multiaxial non-crimp fabric according to at least one of the preceding claims wherein the multifilament reinforcing yarns are carbon yarns having a strength of at least 5000MPa measured according to JIS-R-7608 and a tensile modulus of at least 260GPa measured according to JIS-R-7608 and/or carbon fiber yarns having a strength of at least 4500MPa measured according to JIS-R-7608 and a tensile modulus of at least 240GPa measured according to JIS-R-7608.

8. Multiaxial non-crimp fabric according to at least one of the preceding claims wherein the non-woven layer (1) has polyester.

9. Multiaxial non-crimp fabric according to any one of the preceding claims 1 to 7 wherein the non-woven layer (1) has a thermoplastic polymer material, wherein the thermoplastic polymer material comprises a first polymer component and a second polymer component having a melting temperature lower than the melting or decomposition temperature of the multifilament reinforcing yarns, wherein the first polymer component has a melting temperature lower than the second polymer component and is soluble in an epoxy, cyanate or benzoxazine matrix resin, or a mixture of these matrix resins, and the second polymer component is insoluble in an epoxy, cyanate or benzoxazine matrix resin, or a mixture of these matrix resins.

10. The multiaxial non-crimp fabric according to claim 9, wherein the first polymer component has a melting temperature in a range of 80 to 135 ℃ and the second polymer component has a melting temperature in a range of 140 to 250 ℃.

11. The multiaxial non-crimp fabric of claim 9, wherein the second polymer component is a polyamide homopolymer or a polyamide copolymer or a mixture of polyamide homopolymers and/or polyamide copolymers.

12. The multiaxial non-crimp fabric according to claim 11, wherein the polyamide homopolymer or copolymer is polyamide 6, polyamide 6.6, polyamide 6.12, polyamide 4.6, polyamide 11, polyamide 12, or polyamide 6/12.

13. The multiaxial uncrimped fabric according to claim 9, wherein the first polymer component is a polymer that chemically reacts with epoxy, cyanate ester, or benzoxazine matrix resins when these matrix resins are crosslinked.

14. The multiaxial uncrimped fabric of claim 9, wherein the first polymer component is a polyhydroxy ether.

15. The multiaxial non-crimp fabric according to claim 9, wherein the nonwoven layer (1) comprises 20 to 40 wt.% of the first polymer component and 60 to 80 wt.% of the second polymer component.

16. A layer structure, wherein the layer structure has at least one multiaxial non-crimp fabric according to claim 1.

17. A fibre-reinforced composite material, wherein the composite material is formed from at least one layer structure according to claim 16 and a further matrix material.