Unlock instant, AI-driven research and patent intelligence for your innovation.

Chopped fiber reinforced thermoplastic resin plate and preparing method thereof

A technology for reinforcing thermoplastic and chopped fibers, which is used in flat products, other household appliances, household appliances, etc., can solve the problems of increased product cost, weak interface between fibers and thermoplastic resin, and high cost, and achieves high mechanical properties. Excellent press formability and mechanical properties, and the effect of improving press formability

Active Publication Date: 2018-12-18
GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Reinforcing fibers are directly applied in the form of continuous bodies. Although significant mechanical properties can be obtained, they are not suitable for integrated molding of complex structural parts
For the continuous fiber with multi-directional weaving, on the one hand, the cost is high, on the other hand, the fiber buckling caused by weaving and the incomplete impregnation of thermoplastic resin affect the final mechanical properties of the product to a certain extent; Layers, ply angle, design of lamination structure, and interlayer bonding force between different layers have a great influence on the characteristics of the board, so the angle, quantity and composite process of the ply are particularly important in the lamination process. Whether it is through increasing labor costs or equipment investment, it will inevitably lead to an increase in product costs, so to a certain extent, it limits the wide application of continuous fiber reinforced thermoplastic resin composites.
Among the chopped fiber-reinforced composite sheets currently on the market, there are extruded thermoplastic resins coated with pre-fabricated chopped fiber mats, and chopped fibers are directly laminated with extruded thermoplastic resin sheets. Regardless of the form of compression, the interweaving angle of chopped fibers cannot be designed in a simple sub-region. The impregnation effect of thermoplastic resin is poor, resulting in weak interfacial bonding between fibers and thermoplastic resin, which greatly affects the Mechanical Properties and Stability of Chopped Fiber Reinforced Materials

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Chopped fiber reinforced thermoplastic resin plate and preparing method thereof
  • Chopped fiber reinforced thermoplastic resin plate and preparing method thereof
  • Chopped fiber reinforced thermoplastic resin plate and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0028] Examples 1-4 and Comparative Examples 1-3 Preparation method of chopped fiber reinforced thermoplastic resin sheet:

[0029] The resin matrix is ​​heated and extruded into a film, and then poured into the continuous fibers stretched in parallel to form the upper and lower coatings of the continuous fibers, and then compounded by heating and pressing the rollers, the continuous fiber thermoplastic resin sheet; the continuous fiber thermoplastic resin The sheet is chopped to obtain a chopped fiber-reinforced thermoplastic resin sheet with a set width and length; according to the length and angle setting of the chopped fiber, the chopped fiber-reinforced thermoplastic resin sheet is spread on the conveyor belt, and the chopped fiber-reinforced thermoplastic resin sheet The resin sheets are lapped at a predetermined angle and advanced along the conveyor belt, and then heat-set at 190-220°C until the predetermined length is completed to obtain chopped fiber-reinforced thermop...

Embodiment 1

[0037] In this embodiment, the chopped fiber reinforced thermoplastic resin sheet has 6 layers of chopped fiber layers, the weight percent of glass chopped fiber is 50wt%, and the weight percent of polypropylene resin matrix is ​​50wt%; the chopped fiber reinforced thermoplastic resin sheet The plate width is 1550mm, the length is 558.4mm, and the thickness is 3mm; the chopped fiber reinforced thermoplastic resin plate is vertically divided into 3 areas along the plate width direction according to 1:1.8:1, from left to right, the first part of each area The laying direction of glass chopped fibers is perpendicular to the board width direction, and the angle Θ between the second part of glass chopped fibers and the first part of glass chopped fibers is respectively distributed in 0-30°, 60-90°, 0-30° Within the range, wherein, the range of the included angle Θ does not include 0°; the length of the glass chopped fibers of each layer is 5mm / 10mm / 20mm / 20mm / 10mm / 5mm in turn.

...

Embodiment 2

[0040] In this embodiment, the chopped fiber reinforced thermoplastic resin sheet has 6 layers of chopped fiber layers, the weight percent of the glass chopped fiber is 50wt%, and the weight percent of the polypropylene resin matrix is ​​50wt%; the chopped fiber reinforced thermoplastic resin sheet The width is 1550mm, the length is 558.4mm, and the thickness is 3mm; among them, the chopped fiber reinforced thermoplastic resin sheet is vertically divided into three areas according to the width direction of the plate at a ratio of 1:1.8:1. From left to right, the first part of glass in each area Chopped fiber layering direction is perpendicular to the plate width direction, the angle Θ between the second part of glass chopped fibers and the first part of glass chopped fibers is 15°, 60-90°, 15°; the glass chopped fibers of each layer The length of the fiber is 5mm / 10mm / 20mm / 20mm / 10mm / 5mm in turn.

[0041] The chopped fiber-reinforced thermoplastic resin sheet was molded in...

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
Login to View More

PUM

PropertyMeasurementUnit
lengthaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention provides a chopped fiber reinforced thermoplastic resin plate. The chopped fiber reinforced thermoplastic resin plate is perpendicularly divided into n areas in the plate width direction, wherein n is larger than or equal to 2. The chopped fiber reinforced thermoplastic resin plate is composed of at least 3 layers of chopped fiber layers and a resin base body, wherein chopped fibersin the chopped fiber layers are divided into two parts according to the different laying directions, the laying direction of the first part of chopped fibers is perpendicular to the plate width direction, an included angle theta is formed by the laying direction of the second part of chopped fibers and the first part of chopped fibers, the included angle theta in each area is in a range selected from A which is 0 degree-30 degrees, B which is 30 degree-60 degrees and C which is 60 degree-90 degrees, the ranges where the included angles theta of the adjacent areas belong to are different, and the included angles theta do not include 0 degree. According to the chopped fiber reinforced thermoplastic resin plate, due to designability of the chopped fiber lengths and the chopped fiber includedangles theta, the plate can have the beneficial effects of excellent compression molding performance, integrated forming performance and the like, and meanwhile high mechanical performance is achieved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a chopped fiber reinforced thermoplastic resin plate and a preparation method thereof. Background technique [0002] Reinforcing fibers are directly applied in the form of continuous bodies. Although significant mechanical properties can be obtained, they are not suitable for integrated molding of complex structural parts. For the continuous fiber with multi-directional weaving, on the one hand, the cost is high, on the other hand, the fiber buckling caused by weaving and the incomplete impregnation of thermoplastic resin affect the final mechanical properties of the product to a certain extent; Layers, ply angle, design of lamination structure, and interlayer bonding force between different layers have a great influence on the characteristics of the board, so the angle, quantity and composite process of the ply are particularly important in the lamination process. Whe...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/12B29C70/14B29C70/42B29L7/00B29K105/12B29K105/14
CPCB29C70/12B29C70/14B29C70/42B29K2105/12B29K2105/14B29L2007/002
Inventor 廖梦圆黄险波范欣愉熊鑫孙雅杰秦永利马雷
Owner GUANGZHOU KINGFA CARBON FIBER NEW MATERIALS DEV