Preparation method of fiber-reinforced thermoplastic product

A fiber-reinforced and thermoplastic technology, which is applied in the field of fiber and recycled waste preparation, can solve the problems of less chance of contact with the rotary knife and the inability to disperse fiber bundles, etc., and achieve the effects of easy demoulding, easy dust cleaning and long service life

Inactive Publication Date: 2015-01-07
NINGBO HUAYE MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Now commonly used mixers only have the rotary knives on the bottom or both sides to disperse the bundled fibers. Due to the small number of rotary knives, the probability of each fiber bundle touching the rotary knives is relatively small, and the movement direction of the rotary knives is independent. It is a kind of vertical and barrel wall, which has little effect on the fiber bundles parallel to the barrel wall, and cannot effectively break up the fiber bundles, so a mixer with better effect is needed to replace it.
[0004] At present, no hybrid impregnation device with practical value and industrial application prospect has been found to be used in the manufacturing process of thermoplastic composite materials, and the whole process is simple, low cost, and can produce high-strength molded products

Method used

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  • Preparation method of fiber-reinforced thermoplastic product
  • Preparation method of fiber-reinforced thermoplastic product
  • Preparation method of fiber-reinforced thermoplastic product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] (1) Grind the thermoplastic resin into a 30-mesh powder with a pulverizer; then use a mixing and impregnating device (such as figure 2 As shown) the powder and 2cm of reinforcing fiber are mixed according to mass percentage 70%:30% to obtain a mixture; wherein the reinforcing fiber contains 30% glass fiber;

[0064] (2) Weigh 17.5 kg of the mixed material and spread it evenly on the molding die (lower plate: 3mm stainless steel plate; lower release cloth: 0.65mm thick Teflon cloth; iron frame: length 1900mm*width 800*height 8mm ; Upper release cloth: 0.65mm thick Teflon cloth), such as image 3 and 4 shown.

[0065] (3) Put the mold into the heating and melting multi-layer molding device (such as image 3 shown) for about 10 minutes to make the material temperature reach 220°C, turn on the heating press, uncover the upper and lower release cloths, remove the mold, fold the heated and melted material inwards until it is smaller than the size of the mold, and then put...

Embodiment 2

[0068] (1) Grinding the thermoplastic resin into a 20-mesh powder with a mill; then using a fiber mixing and impregnating device to mix the powder and 1.5 cm of reinforcing fibers at a mass percentage of 60%:40% to obtain a mixture; wherein, The reinforcing fiber contains 30% glass fiber;

[0069] (2) Get 100% of the above compound into the extrusion screw (such as Figure 8 Shown) to extrude the molten material;

[0070] (3) making molten material extrude width through die is 400mm, and height is 12.5 kilograms of molten material of 40mm;

[0071] (4) Put 12.5 kilograms of molten material into the mold of the molding machine, press and mold the closed molding machine, cool and set the shape, and obtain the brick machine pallet.

[0072]

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Abstract

The invention relates to a preparation method of a fiber-reinforced thermoplastic product. The preparation method comprises the following steps: (1) thermoplastic resin powder and reinforced fibers are mixed by a mixed dipping device; and (2) the mixture is molten through hot pressing or extrusion, and is pressed and cooled to obtain a molded product. The preparation method uses the reinforced fibers and recovered wastes, so that the raw materials are environment-friendly and low in cost, and no secondary pollution is generated; and the molded product is light in mass and high in strength, can be recycled, has wide purposes in industry, and has higher economic and social values.

Description

technical field [0001] The invention relates to the field of fiber and recycled waste preparation, in particular to a preparation method of fiber-reinforced thermoplastic products. Background technique [0002] In the manufacturing process of thermoplastic composite materials, whether it is the melt impregnation method (dry method) or the slurry impregnation method (wet method), it is necessary to open the fibers into single fibers before entering the next process, whether it is glass fiber, or Chemical fibers or cotton and linen fibers are bundled, and there are hundreds of single fibers in a bundle of fibers. The reasons for the bundled fibers are natural such as cotton and linen, and man-made such as chemical fibers and glass fibers. No matter what kind of fiber, the combination between single fiber and single fiber is tight and not dead, and can be opened by external force. [0003] Now commonly used mixers only have the rotary knives on the bottom or both sides to disp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54
CPCB29B15/10B29C43/003B29C43/02B29C48/022
Inventor 金一平陈子蛟程太品雷飞夏洪涛
Owner NINGBO HUAYE MATERIAL TECH
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