Method for preparing thermoplastic fiber-hybrid woven composite

[0018] Example 1

[0019] A preparation method of a thermoplastic fiber hybrid woven composite material includes three steps: the production of thermoplastic wrapping yarn, the weaving of the composite material preform and the woven composite material molding process, wherein the thermoplastic wrapping yarn is made of reinforcing fibers It is composed of thermoplastic resin fiber, and the existing fiber wrapping technology is used to mix the reinforcing fiber with the thermoplastic resin fiber in a feasible volume ratio. The volume fraction of thermoplastic fiber is 40%, and the volume fraction of reinforcing fiber is 60%. The thermoplastic resin fiber is evenly coated on the reinforcing fiber to form a thermoplastic wrapping yarn. Using a fancy twisting machine, three filament fibers of industrial polyester (PET), glass fiber (GF) and polypropylene (PP) are combined without twist at a volume ratio of 3:3:4, and then thermoplastic resin fiber is used PP filaments are coated to prepare a wrapping yarn with a hybrid effect. Table 1 shows the specifications and volume fraction of the fiber of the present invention.

[0020] The weaving step of the composite material preform takes the above-mentioned wrapping yarn as the raw material, and designs a plain weave fabric with a tightness of 40%. After warping, drawing in, reeding, and inputting the upper machine drawing, the rapier loom is used to realize Weaving of preforms.

[0021] The woven composite material molding process adopts two hot press molding processes to heat the composite material preform to obtain a thermoplastic composite material; it consists of the following steps: (1) When the temperature reaches the holding temperature of 190°C, Three-layer composite material preforms, the laminating method adopts the same direction of warp and weft or cross laminating of warp and weft; the laminated composite material preform is placed in the processing mold for preparing the composite material plate. (2) Using a plate vulcanizer, apply a holding pressure of 5MPa, and after a holding time of 20min, the composite material preform can be hot-pressed. (3) Cool the temperature water to 150°C (between the softening point and melting point of the thermoplastic matrix), and apply a secondary pressure of 10 MPa for 3 min. (4) Cool to room temperature to prepare a thermoplastic fiber hybrid woven composite material.

[0022] Test of the tensile properties of the thermoplastic fiber hybrid woven composite material of this example

[0023] A microcomputer-controlled electronic universal testing machine is used for the tensile performance test, and the test refers to the GB/T1447-2005 fiber reinforced plastic tensile performance test method. The test results are shown in Table 4.

[0024] Example 2

[0025] A preparation method of a thermoplastic fiber hybrid woven composite material includes three steps: the production of thermoplastic wrapping yarn, the weaving of the composite material preform and the woven composite material molding process, wherein the thermoplastic wrapping yarn is made of reinforcing fibers It is composed of thermoplastic resin fiber and the existing fiber wrapping technology is used to mix the reinforcing fiber with the thermoplastic resin fiber in a feasible volume ratio. The volume fraction of thermoplastic fiber is 80%, and the volume fraction of reinforcing fiber is 20%. The thermoplastic resin fiber is evenly coated on the reinforcing fiber to form a thermoplastic wrapping yarn. Using a fancy twisting machine, the three filament fibers of industrial polyester (PET), glass fiber (GF) and polypropylene (PP) are combined without twist at a volume ratio of 1:1:8, and then the thermoplastic resin fiber PP is used. The filaments are covered to produce a wrapping yarn with a hybrid effect. Table 2 shows the specifications and volume fraction of the fibers of the present invention.

[0026] The weaving step of the composite material preform uses the above-mentioned wrapping yarn as the raw material, and designs the plain weave fabric of the plain weave fabric with a tightness of 50%. After warping, drawing in, reeding, inputting the machine drawing, using rapier weaving Machine to realize the weaving of preforms.

[0027] The woven composite material molding process adopts two hot press molding processes to heat the composite material preform to obtain a thermoplastic composite material; it consists of the following steps: (1) When the temperature reaches the holding temperature of 190°C, Three-layer composite material preforms, the laminating method adopts the same direction of warp and weft or cross laminating of warp and weft; the laminated composite material preform is placed in the processing mold for preparing the composite material plate. (2) Using a plate vulcanizer, apply a holding pressure of 5MPa, and after a holding time of 20min, the composite material preform can be hot-pressed. (3) Cool the temperature water to 150°C (between the softening point and melting point of the thermoplastic matrix), and apply a secondary pressure of 10 MPa for 3 min. (4) Cool to room temperature to prepare a thermoplastic fiber hybrid woven composite material.

[0028] Test of the tensile properties of the thermoplastic fiber hybrid woven composite material of this example

[0029] A microcomputer-controlled electronic universal testing machine is used for the tensile performance test, and the test refers to the GB/T1447-2005 fiber reinforced plastic tensile performance test method. The test results are shown in Table 4.

[0030] Example 3

[0031] A method for preparing a thermoplastic fiber hybrid woven composite material includes three steps: the production of thermoplastic covered yarn, the weaving of the composite material preform and the woven composite material forming process, wherein the thermoplastic wrapped yarn is composed of reinforcing fibers and It is composed of thermoplastic resin fibers. The existing fiber wrapping technology is used to mix reinforcing fibers and thermoplastic resin fibers in a feasible volume ratio. The volume fraction of thermoplastic fibers is 50%, and the volume fraction of reinforcing fibers is 50%. The resin fiber is evenly coated on the reinforcing fiber to form a thermoplastic wrapping yarn. Using a fancy twisting machine, the three filaments of reinforced fiber glass fiber (GF), carbon fiber (CF) and polypropylene (PP) are combined without twist at a volume ratio of 1:1:2, and then the thermoplastic resin fiber PP is used. The filaments are covered to produce a wrapping yarn with a hybrid effect. Table 3 shows the specifications and volume fraction of the fibers of the present invention.

[0032] The weaving step of the composite material preform uses the above-mentioned wrapping yarn as the raw material, and designs a twill fabric of a plain weave fabric with a tightness of 45%. After warping, drawing in, reeding, inputting the machine drawing, using rapier weaving Machine to realize the weaving of preforms. As shown in Table 4. Table 4 shows the specifications of the fiber of the invention and the proportion of hybrid yarns.

[0033] The described woven composite material molding process adopts two hot press molding processes to heat the composite material preform to obtain a thermoplastic composite material; it consists of the following steps: (1) When the temperature reaches 170°C, the 7-layer composite material preforms, the laminating method adopts the same laminating method in the warp and weft directions to lay the samples; the laminated composite material preforms are placed in the processing mold for preparing the composite sheet. (2) Using a plate vulcanizer, apply a holding pressure of 10 MPa, and after a holding time of 10 minutes, the hot pressing of the composite material preform is realized. (3) Cool the temperature water to 150°C (between the softening point and melting point of the thermoplastic matrix), and apply a secondary pressure of 15 MPa for 10 min. (4) Cool to room temperature to prepare a thermoplastic fiber hybrid woven composite material.

[0034] Test of the tensile properties of the thermoplastic fiber hybrid woven composite material of this example

[0035] A microcomputer-controlled electronic universal testing machine is used for the tensile performance test, and the test refers to the GB/T1447-2005 fiber reinforced plastic tensile performance test method. The test results are shown in Table 4.