Continuous fiber multi-axial enhanced thermoplasticity preconsolidation sheet and preparation method thereof

A technology of reinforced thermoplastic and continuous fiber, applied in chemical instruments and methods, flat products, other household appliances, etc., can solve the problems of high production cost, difficult to handle die head, high manufacturing cost, etc., to ensure stability, prevent breakage, The effect of improving quality

Inactive Publication Date: 2011-10-19
CHANGZHOU HONGFA ZONGHENG ADVANCED MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: only unidirectional prepreg tape can be produced; the design of the die head is complicated and the manufacturing cost is high; it is difficult to control the process of fiber impregnation inside the die head, and it is difficult to handle the die head and fiber row Cloth and threading are difficult; the width of the sheet (board) is also restricted due to the complexity of the die head (usually a narrow coil is made first, and then several rolls of narrow plates are placed side by side, and a certain thickness is made by composite technology. width of the coil)
This method has the technical defects of difficulty in environmental protection recovery and high production cost. Both of them cannot realize the one-time preparation of high-performance fabric structural materials such as 0° / 90°±45° and ±60°. Performance fiber fabric thermoplastic composites still have many process deficiencies that need to be improved

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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  • Continuous fiber multi-axial enhanced thermoplasticity preconsolidation sheet and preparation method thereof
  • Continuous fiber multi-axial enhanced thermoplasticity preconsolidation sheet and preparation method thereof
  • Continuous fiber multi-axial enhanced thermoplasticity preconsolidation sheet and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] refer to figure 1 The shown preparation biaxially pre-consolidated sheet comprises the following steps:

[0032] Prepare 1200tex glass fiber 52Kg and area density 100g / m 2 The thermoplastic polypropylene resin film is 35Kg, and the modified thermoplastic resin film is selected from PP material; the product width is 1220mm, the original width of single yarn is 4.5mm, and the surface density in warp direction and weft direction is 178g / m respectively 2 and 212g / m 2 , calculated by the process, the warp density and weft density are 3.8 threads / inch and 4.5 threads / inch respectively, and the widths of warp and weft stretched fibers are 6.7mm and 5.7mm respectively;

[0033] (1) Pull out the yarn in direction A from the creel, pass through the godet roller, the dividing reed, the godet roller and the dividing reed in turn, and then control the tension of the yarn through the pulling roller to ensure the tension of the yarn when it is drawn out. Stability and parallel arra...

Embodiment 2

[0048] refer to figure 1 , figure 2 As shown, the preparation of 0° / 90° and ±45° four-axis reinforced thermoplastic pre-consolidated sheet includes the following steps:

[0049] Prepare 1200tex glass fiber 160Kg and area density 100g / m 2 The PPS resin film is 132Kg, the product width is 1650mm, the original width of single yarn is 4.5mm, and the surface density of 0° / 90° and ±45° is 131g / m respectively 2 , 158g / m 2 , 170g / m 2 and 170g / m 2 , the widths of each layer of yarn after spreading are 10mm, 8mm, 7.5mm and 7.5mm;

[0050] (1) Pull out the yarn in direction A from the creel, pass through the godet roller, the dividing reed, the godet roller and the dividing reed in turn, and then control the tension of the yarn through the pulling roller to ensure the tension of the yarn when it is drawn out. Stability and parallel arrangement, imported into the oven for preheating, the preheating temperature range is 200-260°C, and the yarn in the A direction is stretched into a ...

Embodiment 3

[0065] refer to figure 1 , image 3 As shown, prepare 0° / 90° biaxially reinforced thermoplastic pre-consolidated sheet, which includes the following steps:

[0066] Prepare 1200tex glass fiber 110Kg and area density 100g / m 2 The polyester PET resin film is 65Kg, the width is 2450mm, the original width of single yarn is 4.5mm, and the surface density in warp and weft is 178g / m respectively 2 and 212g / m 2 , calculated by the process, the warp density and weft density are 3.8 threads / inch and 4.5 threads / inch respectively, and the widths of warp and weft stretched fibers are 6.8mm and 5.8mm respectively;

[0067] (1) Pull out the yarn in direction A from the creel, pass through the godet roller, the dividing reed, the godet roller and the dividing reed in turn, and then control the tension of the yarn through the pulling roller to ensure the tension of the yarn when it is drawn out. Stability and parallel arrangement, imported into the oven for preheating, the preheating temp...

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Abstract

The invention discloses a preparation method of a continuous fiber multi-axial enhanced thermoplasticity preconsolidation sheet. Warp direction and weft direction yarns are respectively led out from a creel to be expanded after being preheated by a drying oven, and then the yarns are conveyed to a weaving and overlaying net system by a traction roller. Under the control of a tension system, nets are overlaid in a cross mode to prepare multi-axial wiring harness sheets. The upper layer, the lower layer and the middle layer of the fabric sheet are respectively overlaid with the modified thermoplasticity resin film to prepare preformed thermoplasticity base material. The base material is introduced into the drying oven to be plastified at high temperature, and the sheet is subjected to cold pressing and shaping after continuous roll-in melting dipping to prepare the multi-axial enhanced preconsolidation sheet. According to the warp knitting wiring harness and the tentering dipping technology disclosed by the invention, the fabric wiring harness structure is kept, the dry fiber zone in material is eliminated, the compactness of the material is improved, and the porosity of the material is lowered; the fabric fibers of different directions construct higher specific strength of the thermoplasticity composite material; and the new technology breaks through the technical bottleneck that high-performance fiber fabric is difficult to dip.

Description

technical field [0001] The invention introduces continuous fiber spreading into a multi-axial warp knitting process to prepare a high-performance fiber fabric thermoplastic composite material, and in particular relates to a continuous fiber multi-axial pre-consolidated sheet and a preparation method thereof. Background technique [0002] Warp knitting technology has been developed in recent years; a method suitable for preparing multi-axially reinforced thermoplastic composite materials of high-performance fiber fabrics; Thermoplastic substrates, continuous fiber reinforced thermoplastic composites prepared by thermocompression molding. The composite material prepared by this technology has the characteristics of keeping the fiber in a straight state, the flexibility and covering of the fabric are good, the shape (fiber direction and structure) can be adjusted, and the loss of mechanical properties is small. The high efficiency and automation of this textile technology can ...

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 Applications(China)
IPC IPC(8): B29C70/54B32B27/12B32B37/04B29L7/00B29L9/00
Inventor 黄亦赛谈昆伦黄云清季建强
Owner CHANGZHOU HONGFA ZONGHENG ADVANCED MATERIAL TECH
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