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Manufacture technology of hemp woven fabric reinforced composite material sheet

A composite material and fabric reinforcement technology, applied to flat products, applications, household appliances, etc., can solve the problems of undesignable strength in all directions, failure to meet the use requirements, multi-surface treatment work, etc., to achieve enhanced designability and manufacturing costs The effect of low and good economic benefits

Active Publication Date: 2009-07-29
黑龙江金达麻业有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent 200410019063.8 "A manufacturing method of flax nonwoven and its composite material" discloses a method of using needle punched flax nonwoven as a reinforcement of the composite material, configuring resin, and manufacturing the composite material by vacuum injection method method, the composite material manufactured by this method uses non-woven fabrics, that is, loose fibers as reinforcements, and the reinforcement method is acupuncture, and the strength is not enough
The isotropic strength cannot be designed, and the strength of non-woven reinforced composite materials in all directions is the same, so that the isotropic strength of the board is the same, which cannot meet various use requirements
In addition, the forming process adopts the VARTM process, only one side is a rigid mold, the surface will be uneven after forming, and a lot of surface treatment is required

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Manufacture technology of hemp woven fabric reinforced composite material sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] see figure 1 , the linen woven fabric 1 is laid layer by layer in the prefabricated mold 2 in an orderly manner according to the designed layer angle and number of layers, and each layer of linen woven fabric is cross-laminated. Generally, the number of layers of linen woven fabric is 4 layers to 12 layers, 8 layers of flax woven fabrics are laid in this embodiment, and the laying angles of each layer of flax woven fabrics from the beginning to the end are successively 0°, 90°, +30°, -30°, +30°, -30°, 0°, 90°. The volume content of flax fiber is not less than 40%, then the mold is closed and sealed, and the mold is filled by using the closed mold molding process-resin transfer molding (RTM process). The mold filling adopts high-pressure injection at one end, and the filling resin uses Epoxy resin and add corresponding diluent and curing agent to adjust resin viscosity and curing time. The ratio of resin curing system is: epoxy resin, polyamide curing agent, reactive di...

Embodiment 2

[0012] see figure 1 , the jute woven fabric 1 is laid layer by layer in the prefabricated mold 2 in an orderly manner according to the designed laying angle and the number of layers, and each layer of jute woven fabric is cross-laminated. Generally, the number of layers of the jute woven fabric is 4 layers to 12 layers, 8 layers of jute woven fabrics are laid in the present embodiment, and the laying angles of each layer of jute woven fabrics from the beginning to the end are successively 0 °, 90 °, +30 °, -30 °, +30 °, -30°, 0°, 90°. The volume content of jute fiber is not less than 40%, then the mold is closed and sealed, and the mold is filled by using the closed mold molding process-resin transfer molding (RTM process). The mold filling adopts high-pressure injection at one end, and the filling resin uses Epoxy resin and add corresponding diluent and curing agent to adjust resin viscosity and curing time. The ratio of resin curing system is: epoxy resin, polyamide curing ...

Embodiment 3

[0014] see figure 1 , the kenaf woven fabric 1 is laid layer by layer in the prefabricated mold 2 in an orderly manner according to the designed laying angle and the number of layers, and each layer of kenaf woven fabric is cross-laminated, and the general hemp woven fabric laying layer Number is 4 layers~12 layers, and kenaf woven fabric lays 8 layers in the present embodiment, and the laying angle of each layer of kenaf woven fabric from beginning to end is successively 0 °, 90 °, +30 °,-30 °, +30°, -30°, 0°, 90°. The volume content of kenaf fiber is not less than 40%, then the mold is closed and sealed, and the mold is filled by the closed mold molding process--resin transfer molding process (RTM process). Use epoxy resin and add corresponding diluent and curing agent to adjust resin viscosity and curing time. The ratio of resin curing system is: epoxy resin, polyamide curing agent, and reactive diluent according to a certain ratio of 10: (1.2~2.4 ): (0.6~0.8), the curing...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a method for manufacturing a composite material, in particular a process for manufacturing a hemp woven fabric reinforced composite material plate in the automobile industry. The process for manufacturing the hemp woven fabric reinforced composite material plate is characterized in that the hemp woven fabric is one of flax, jute and ambary; the hemp woven fabric is paved in a prefabricated mould layer by layer; each layer of the hemp woven fabric has a paving angle; each layer of the hemp woven fabric is crossed and paved; the volume content of hemp fibre is more than or equal to 40 percent; a resin transfer molding forming process is adopted to carry out mould filling; the mixture ratio of epoxy resin to a polyamide curing agent to a reactive diluent is 10:(1.2 to 2.4):(0.6 to 0.8); the curing time is four hours; and after mould filling is completed, the fabric is cured at the temperature of 130 DEG C, cooled, demoulded and subjected to surface treatment. The manufactured composite material plate has good strength and excellent impact resistance, can design strength, can be recycled and belongs to an environment-friendly material.

Description

technical field [0001] The invention relates to a manufacturing method of a composite material, in particular to a manufacturing process of a hemp woven reinforced composite material plate used in the automobile industry. Background technique [0002] Low-consumption and energy-saving vehicles have become a major trend in the development of the automotive industry, so more and more automotive parts are made of composite materials. At present, glass fiber reinforced composite materials are widely used. However, when old cars are scrapped, it is very difficult to incinerate and reuse waste composite materials containing glass fibers. In recent years, the rapid development of China's automobile manufacturing industry and the rapid growth of production and sales are also facing this problem. For more than a decade, automakers have used natural fiber-reinforced composites for vehicle parts since 1995, which can be recycled as energy. Flax, jute and kenaf are natural fibers with...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): B29C70/34B29C70/54B29K311/00B29K63/00B29L7/00
Inventor 赵大鹏
Owner 黑龙江金达麻业有限公司
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