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Preparation method of high-strength polyethylene fiber/water-soluble polyurethane composite material

A technology of water-soluble polyurethane and high-strength polyethylene, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems that are not conducive to the bulletproof performance of composite materials, reduce the bulletproof performance of composite materials, and difficult to control resin Content and other issues, to achieve the effect of light weight, improved ballistic performance, and low cost

Inactive Publication Date: 2013-06-05
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, this method is difficult to control the resin content in the composite material, and cannot reduce the resin content in the composite material to an ideal or appropriate level, which is not conducive to improving the ballistic performance of composite products.
On the other hand, since the resin of this method will infiltrate into the single-layer fabric, the slippage of fibers inside the single-layer fabric during the ballistic protection process is limited, thereby reducing the ballistic performance of the composite material.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0015] The preparation method (abbreviation preparation method) of the high-strength polyethylene fiber (UHMWPE) / water-soluble polyurethane composite material (composite material for short) designed by the present invention adopts the following process steps in sequence:

[0016] 1) Apply a release agent on the horizontal metal plate at the edge of the four-sided belt, once every 30 minutes, and apply it three times; the release agent is a known product.

[0017] 2) Evenly coat a layer of polyurethane aqueous solution on the metal plate coated with the release agent, and let it stand in the air for 5-10 minutes to eliminate air bubbles; the concentration of the polyurethane aqueous solution is 5-30wt%. The film thickness is determined by the concentration of the aqueous polyurethane solution and the quality of the coating solution.

[0018] 3) Put the metal plate coated with water-soluble polyurethane in a drying oven at 60-80° C., and dry it for 20-30 minutes.

[0019] 4) Ta...

Embodiment 1

[0027] Apply the release agent on the metal iron plate, and apply it every 30 minutes, and apply it three times in total. Evenly brush a layer of polyurethane solution with a concentration of 15wt% on the iron plate coated with the mold release agent, and let it stand for 10 minutes to eliminate the air bubbles in the polyurethane solution on the iron plate. Put the iron plate brushed with polyurethane into the drying oven, adjust the temperature of the drying oven to 60°C, and dry for 30 minutes. After drying, take out the iron plate, and after cooling, peel off the uniform film for later use. Cut 20 layers of UHMWPE fiber plain weave cloth according to the design requirements, and lay one layer of the prepared film between the layers of UHMWPE fiber plain weave cloth. Turn on the press, and adjust the temperature of the press to 80°C. When the temperature of the press rises to this temperature, the material is placed on the press for hot pressing. Adjust the pressure to 5...

Embodiment 2

[0030] Apply the release agent on the metal iron plate, and apply it every 30 minutes, and apply it three times in total. Evenly brush a layer of polyurethane solution with a concentration of 20wt% on the iron plate coated with the release agent, and let it stand for 10 minutes to eliminate the air bubbles in the polyurethane solution on the iron plate. Place the iron plate brushed with polyurethane in a drying oven, adjust the temperature of the drying oven to 70°C, and dry for 25 minutes. Take out the iron plate, after cooling, peel off the film. Choose a better quality film for later use. Cut 40 layers of UHMWPE fiber twill cloth, and lay one layer of the prepared film between the layers of UHMWPE fiber twill cloth. Turn on the press, and adjust the temperature of the press to 90°C. When the temperature of the press rises to this temperature, the material is placed on the press for hot pressing. Adjust the pressure to 10MPa, take it out after 50min.

[0031] After test...

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Abstract

The invention discloses a preparation method of a high-strength polyethylene fiber / water-soluble polyurethane composite material, which adopts the following technical steps in sequence: release agent is coated on a metal plate every 30 min and is coated for three times in total; a layer of polyurethane aqueous solution with the concentration of 5-30wt percent is uniformly coated on the metal plate, and is stood in the air for 5-10min; the metal plate is arranged in a drying box with the temperature of 60-80 DEG C and dried for 20-30min; then the metal plate is taken out and cooled, and then afilm is removed; the high-strength polyethylene fiber fabrics are cut according to the layers and shapes required in design; moreover, the film is paved between every two layers of fiber fabrics to form a combined sandwich material; and the sandwich material is arranged on a press and is thermally pressed for 30-60min under the temperature of 80-90 DEG C and the pressure of 5-15MPa of the press to obtain the high-strength polyethylene fiber / water-soluble polyurethane composite material.

Description

technical field [0001] The invention relates to a composite material preparation technology, in particular to a preparation method of a high-strength polyethylene fiber / water-soluble polyurethane composite material. The composite material has the characteristics of low resin content and is mainly used for bulletproof products. Background technique [0002] High-strength polyethylene (UHMWPE) fiber is a commonly used reinforcement material in the field of bulletproof composite materials. The raw material used in UHMWPE fiber - ultra-high molecular weight polyethylene, has a large number of amorphous regions of random coils and a crystal structure of folded chains. When super-stretched, the high orientation of its macromolecular chains fully stretches the macromolecules in the crystalline and amorphous regions, forming a highly crystalline supramolecular structure of extended chains. In the bulletproof process, UHMWPE has attracted much attention because the speed of stress ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/02B32B27/08B32B27/30B32B27/40
Inventor 徐志伟陈磊李嘉禄吴晓青陈利孙颖
Owner TIANJIN POLYTECHNIC UNIV