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A kind of preparation method of hollow sandwich composite material

A composite material and sandwich technology, applied in the field of composite materials, can solve the problems of long production cycle of hollow sandwich composite materials, inability to meet market diversification, single shape of molded products, etc., to meet the requirements of high-efficiency preparation and realize batch production The effect of long production and storage period

Active Publication Date: 2019-01-04
NANJING FIBERGLASS RES & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN103707522A patent describes an auxiliary standing device on a hollow composite flat plate production line, which can control the resin content and infiltration effect of the hollow fabric, and improve the standing and height uniformity of the hollow fabric suede, but this method prepares the hollow sandwich composite material The curing needs to be carried out at high temperature for a long time, resulting in waste of resources; CN101480829A patent is a preparation method of hollow fabric sheet, which can accurately control the thickness of hollow fabric sheet, but the production cycle of hollow sandwich composite material prepared by this method is long, It cannot be produced quickly, which reduces its production efficiency, and the shape of the molded product is single, which cannot meet the diverse needs of the market

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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Cut a hollow sandwich fabric with a size of 30000*1500*8mm and place it on the small molecule barrier film; equip 50kg of unsaturated resin with the brand name 6128 from Lidl Resin Co., Ltd., add 10% MgO paste thickener to the resin, and 3% tert-butyl peroxide curing agent, control the release speed of the hollow sandwich fabric to 0.5m / min, the viscosity of the resin to 500mPa.s, and the flow rate to 1.2kg / min, through the extrusion roller and pressure roller device , so that the resin fully infiltrates the hollow fabric, and there will be no glue or excess resin inside the hollow fabric, thereby realizing continuous compounding; then the compounded fabric is completely wrapped with a nylon composite film and placed in an environment of 50 ° C. After aging for 15 hours, the fabric is in the state of soft gum, and then it is wound up and cut to obtain a hollow sandwich fabric prepreg with a resin content of 50% and uniformity.

[0022] The hollow sandwich fabric prepreg...

Embodiment 2

[0024] Cut a hollow core fabric with a size of 100000*1500*5mm and place it on the small molecule barrier film; equip 70kg of unsaturated resin with the brand name 6118 from Lidl Resin Co., Ltd., add 5% MgO paste thickener to the resin, and 0.5% tert-butyl peroxide curing agent, control the release speed of the hollow sandwich fabric to 0.8m / min, the viscosity of the resin to 600mPa.s, and the flow rate to 1.0kg / min, through the extrusion roller and pressure roller device , so that the resin fully infiltrates the hollow fabric, and there will be no glue or excess resin inside the hollow fabric, thereby realizing integrated and continuous compounding; after that, the compounded fabric is completely wrapped with a nylon composite film and placed in an environment of 35°C During the process, the fabric was aged for 24 hours, and the fabric was in the state of soft gum, and then rolled and cut to obtain a hollow sandwich fabric prepreg with a resin content of 40% and uniformity.

...

Embodiment 3

[0027] Cut a hollow sandwich fabric with a size of 60000*1500*12mm and place it on the small molecule barrier film; equip 80kg of unsaturated resin with the brand name of 6128 from Lidl Resin Co., Ltd., add 8% MgO paste thickener to the resin, and 1.5% tert-butyl peroxide curing agent, control the release speed of the hollow sandwich fabric to 1.5m / min, the viscosity of the resin to 800mPa.s, and the flow rate to 1.6kg / min, through the extrusion roller and pressure roller device , so that the resin fully infiltrates the hollow fabric, and there will be no glue or excess resin inside the hollow fabric, thereby realizing integrated and continuous compounding; after that, the compounded fabric is completely wrapped with a nylon composite film and placed in an environment of 45°C In the process, the fabric was aged for 20 hours, and the fabric was in the state of soft gum, and then rolled and cut to obtain a hollow sandwich fabric prepreg with a resin content of 45% and uniformity....

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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PUM

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Abstract

The invention relates to a preparation method of a hollow sandwich composite material. A hollow sandwich fabric in a cut size is integrally and continuously compounded with a resin on a production line; the compounded product is cured, coiled and cut to obtain a hollow sandwich fabric prepreg; and the hollow sandwich fabric prepreg is positioned in a mold for curing after heating to obtain the hollow sandwich composite material. The hollow sandwich fabric prepreg, prepared by the method, is uniform in glue content, and is soft without sticking hands; the hollow composite material obtained by curing the prepreg is excellent in comprehensive performance, and is excellent in shape following performance, so that hollow composite materials of different shapes can be prepared; and in addition, the preparation method has such advantages as long storage period, convenience for use and short curing period, and can satisfy requirements for high-efficiency and low-cost mass production of the hollow sandwich composite material.

Description

technical field [0001] The invention relates to a method for preparing a hollow sandwich composite material, which belongs to the field of composite materials. Background technique [0002] The hollow sandwich fabric is woven by continuous fibers with excellent properties, and the upper and lower surface layers and the Z-direction fibers perpendicular to the upper and lower surface layers constitute the sandwich structure of the hollow fabric. Hollow sandwich fabric composite material is composed of hollow sandwich fabric reinforcement material and resin matrix. It has light weight, high strength, integral molding, strong structure design, high composite efficiency, heat preservation, sound insulation, flame It effectively avoids the defects of traditional sandwich structure materials such as easy delamination, peeling and poor impact resistance. It is widely used in communications, aerospace, aviation, construction, rail transit, wind energy, double-layer storage tanks, boa...

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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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/28B29K67/00
CPCB29C70/28B29K2067/06
Inventor 李晋耿杰周正亮赵大娟张守玉陈同海
Owner NANJING FIBERGLASS RES & DESIGN INST CO LTD
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