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A Lightweight and Low Cost Impact Resistant Laminated Prepreg Composite Sheet

An impact-resistant, composite plate technology, applied in the direction of synthetic resin layered products, layered products, glass/slag layered products, etc., can solve the problems of inability to obtain reinforcement effects, reduced impact strength, material stress concentration, etc. Achieve the effect of strong adhesion, lower overall cost and low equipment investment

Active Publication Date: 2018-07-31
浙江华江科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But its disadvantages are: it is difficult to impregnate the molten resin well at all positions in the entire cross-sectional direction of the fiber bundle; the unidirectional prepreg sheet can only obtain excellent impact resistance in one direction
The problem with this is that localized distortions, ie bends or "kinks", occur in the otherwise straight alignment of the reinforcing fibers, which lead to stress concentrations and the risk of micro-cracks in the material, as well as a tendency to reduce its impact strength
However, this prepreg cannot achieve the same reinforcement effect as continuous long fiber reinforced resin composites

Method used

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  • A Lightweight and Low Cost Impact Resistant Laminated Prepreg Composite Sheet
  • A Lightweight and Low Cost Impact Resistant Laminated Prepreg Composite Sheet
  • A Lightweight and Low Cost Impact Resistant Laminated Prepreg Composite Sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The upper skin 1 of the prepreg is a composite material of chopped glass fiber reinforced thermoplastic resin, the weight ratio of glass fiber to thermoplastic resin is 4:6, and the grammage is 350g / m 2 . The length of the chopped glass fiber is 25mm, and it has a network cross structure in the thermoplastic resin. The thermoplastic resin is a modified polypropylene film, the melt index is 50g / 10min, and the grammage is 105g / m 2 . The structure and grammage of the lower skin 3 of the prepreg are the same as those of the lower skin 3 of the prepreg. The core material 2 is a composite material of chopped glass fiber reinforced thermoplastic resin, and its structure and grammage are the same as those of the prepreg upper skin 1 .

[0028] Press the upper three layers of materials together with a compound machine to form a 1050g / m 2 The laminated prepreg composite board can be used for the skin of the car interior material floor, spare tire cover and other materials, and...

Embodiment 2

[0033] The upper skin 1 of the prepreg is a composite material of chopped glass fiber reinforced thermoplastic resin, the weight ratio of glass fiber to thermoplastic resin is 6:4, and the grammage is 350g / m 2 . The length of the chopped glass fiber is 100mm, and it has a network cross structure in the thermoplastic resin. The thermoplastic resin is a modified polypropylene film, the melt index is 100g / 10min, and the weight is 70g / m 2 . The structure and grammage of the lower skin 3 of the prepreg are the same as those of the lower skin 3 of the prepreg. Core material 2 is unidirectional long-fiber prepreg, with a sheet weight of 350g / m 2 .

[0034] Press the upper three layers of materials together with a compound machine to form a 1050g / m 2 laminated prepreg composite panels. It can be used for the skin of the polypropylene honeycomb panel, which is the material of the truck compartment, and can play a reinforcing role.

Embodiment 3

[0036] The material and structure of the upper and lower skin layers in Example 3 are the same as in Example 1, except for the core layer: the core material 2 is grid glass fiber cloth, and the weight of a single sheet is 350g / m 2 .

[0037] Press the upper three layers of materials together with a compound machine to form a 1050g / m 2 laminated prepreg composite panels.

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Abstract

The invention discloses a lightweight, low-cost and impact-resistant laminated prepreg composite board. The composite board is of a sandwich structure compounded by a prepreg upper surface, a functional core material and a prepreg lower surface. Chopped glass fiber reinforced thermoplastic resin for the laminated prepreg composite board disclosed by the invention is smooth in surface and strong in bonding force; the laminated prepreg composite board disclosed by the invention can be taken as the surface of any material, has an obvious enhancement effect and can also be separately used as a board. The laminated prepreg composite board disclosed by the invention is simple in process, low in equipment investment and less in process; compared with a thermosetting fiber reinforced material, the laminated prepreg composite board has the characteristic of thermal plasticity, can be molded for multiple times and is granulated and recycled after being crushed.

Description

technical field [0001] The invention belongs to the field of glass fiber-reinforced thermoplastic resin composite materials, and in particular relates to a laminated structure of lightweight, low-cost and impact-resistant prepreg composite boards. Background technique [0002] At present, there are two main types of glass fiber reinforced materials from the state of matrix resin: glass fiber thermosetting resin and glass fiber reinforced thermoplastic resin. Thermosetting resin can bring excellent impact resistance to composite materials, but it has low molding efficiency, poor weather resistance, short service life, and cannot be used again, which is not conducive to the recovery and recycling of materials. Thermoplastic resins can be heated and molded many times, which is beneficial to the secondary use of materials. [0003] There are two main types of glass fiber reinforced materials from the fiber state: continuous long glass fiber reinforced and chopped glass fiber re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B17/02B32B17/04B32B27/04B32B17/10B32B27/12
CPCB32B17/10B32B27/12B32B2307/718B32B2307/558B32B2260/046B32B2260/021B32B2250/03
Inventor 赵涛卢成勇楼娣朱艳妍马国维
Owner 浙江华江科技股份有限公司
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