JPWO2018122125A5 - - Google Patents

Description

The structural multilayer composite material according to the invention appropriately stacks a required layer of leather, a single layer and any of the above layers, and has an absolute pressure of at least 5 bar, preferably at least 6 bar. It can be manufactured by compressing them at a pressure and temperature of 35-120 ° C. Preferably, the stack layer is compressed at an absolute pressure of 6-300 bar, preferably 17-200 bar, more preferably 18-150 bar. The compression can optionally be done in a static press such as an autoclave. In a static press, the sheet can be compressed into the shape of the final product. The percentage of the surface area of the stack compressed at high pressure according to the present invention determines the percentage of the final composite, including the structural multilayer material. For example, at least about 90% of the surface area of the stack is compressed at high pressure according to the present invention to give a composite material having at least 90% of the structural multilayer composite material. More preferably, the composite consists of at least 95% of its surface of the structural multi-layer composite. Most preferably, the composite consists of at least 98% of its surface of the structural multi-layer composite. Compression under these conditions is achieved with a static press such as an autoclave. Preferably, the continuous press is used in the form of a calendar or continuous belt press. As an alternative, a continuous press may be used in the form of a calendar or continuous belt press. After continuous production, the composite can be cut into sheets of appropriate size. The temperature during compression is preferably 35 to 120 ° C. More preferably, the temperature during pressing is 40 to 100 ° C, and most preferably the temperature during pressing is 45 to 90 ° C. This results in a composite with rigid characteristics that further emphasizes the structural properties of the composite. A further advantage of such composites according to the present invention is that their shape can be easily adjusted. For example, such a stiff sheet can be bent upwards, for example by bending the sheet in a V shape along the edge, and the bent sheet better maintains its shape.

Claims (16)

A composite that has rigid characteristics and at least 90% of its surface is a structural multilayer composite (S), which is in contact with the first single layer (20) and has a thickness of 0.5-6 mm. Includes a layer of leather (10) in the range , said first single layer (20) comprising parallel UHMWPE fibers aligned in the direction of the first fiber and a first matrix material having a stiffness of at least 3 MPa. Only less than 10% of the surface area of the surface remains flexible,
The structural feature of the structural multilayer composite (S) is that the structural multilayer composite is supported when it is positioned on the horizontal plane and protrudes 20 cm without being supported from the edge of the horizontal plane. A composite material defined as a feature where the outer edge of the unfinished part does not bend down more than 3 centimeters . The multilayer composite material according to claim 1, wherein the UHMWPE fibers consist of polyethylene filaments in which the titer of a single filament of these fibers is less than 10 denier. It further comprises a second monolayer (30) in contact with the first monolayer (20), wherein the second monolayer (30) is a parallel fiber aligned in the second fiber direction and a second. The first single layer (20) is the said in the composite so that the second fiber direction is offset with respect to the first fiber direction up to 90 degrees. The multilayer composite material according to claim 1, which is rotated with respect to the second single layer (30). Further comprising an additional monolayer of parallel fibers, each monolayer comprising parallel fibers and a matrix, one monolayer of the additional monolayer contacts the second monolayer, thereby being continuous. Claimed that the monolayers are stacked and arranged in the multilayer composite such that each monolayer is rotated relative to an adjacent monolayer so that the fiber orientation is offset in each successive layer. Item 3. The multilayer composite material according to Item 3. The multilayer composite material according to claim 1, wherein the thickness of the leather layer is in the range of 0.7 to 2.8 mm. The multilayer composite material according to any one of claims 1 to 5 , further comprising a polymer film (100) that comes into contact with a single layer so as to form an outer layer of the composite material. The multilayer composite material according to claim 6 , wherein the film is waterproof / breathable. The multilayer composite material according to claim 1 , wherein the strength of the fiber is at least 0.5 GPa. The multilayer composite material according to claim 1 , wherein the strength of the fiber is at least 2.5 GPa. The multilayer composite material according to claim 1 , wherein the UHMWPE fiber has an intrinsic viscosity of at least 4 dl / g. The multilayer composite material according to any one of claims 1 to 10, wherein the at least one matrix material comprises at least one of polyacrylate, a polymer functionalized with an acrylate group, and polyurethane. The multilayer composite material according to any one of claims 1 to 11 , wherein the fiber density in any one single layer is 1 to 50 grams / square meter. The method of making a composite according to any one of claims 1-12 , wherein the composite has rigid features and at least 90% of its surface is a structural multilayer composite; a layer of leather; parallel. A step of providing an assembly comprising aligned fibers and a matrix material having a stiffness of at least 3 MPa ; and optionally at least one polymer film layer; said assembly having two outer surfaces. A method comprising the steps of having one of the leather layers and compressing at least 90% of the assembly at a pressure of 6-300 bar and a temperature of 35-120 ° C. A step of compressing less than 10% of the assembly with a pressure of less than 5 bar, whereby at least 90% of its surface contains a structural multilayer composite and less than 10% of its surface is a flexible composite. 13. The method of claim 13 , further comprising a step of producing the composite material comprising. 13. The method of claim 13 , wherein at least one of the outer surfaces comes into contact with the cover during the compression and the cover can be optionally removed from it. 13 . Use of structural multi-layer composite material.