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Thermoplastic polymer composite material directionally reinforced by long fibers or continuous fibers and preparation method thereof

A thermoplastic polymer and continuous fiber technology, applied in the field of fiber-oriented reinforced thermoplastic polymer composite materials and its preparation, can solve difficult problems, achieve excellent mechanical properties and improve mechanical properties

Inactive Publication Date: 2018-12-07
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the difficult problem of preparing fiber-reinforced thermoplastic polymer composite materials by using long fibers or continuous fibers in the existing extrusion process, the present invention proposes a long-fiber or continuous fiber directionally reinforced thermoplastic polymer composite material and its preparation method

Method used

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  • Thermoplastic polymer composite material directionally reinforced by long fibers or continuous fibers and preparation method thereof
  • Thermoplastic polymer composite material directionally reinforced by long fibers or continuous fibers and preparation method thereof
  • Thermoplastic polymer composite material directionally reinforced by long fibers or continuous fibers and preparation method thereof

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specific Embodiment approach 1

[0040] Specific Embodiment 1: In this embodiment, the long fiber or continuous fiber directionally reinforced thermoplastic polymer composite material is composed of long fiber and thermoplastic polymer, or is composed of continuous fiber and thermoplastic polymer; the long fiber or continuous fiber orientation is uniformly distributed in the thermoplastic polymer inside the object;

[0041] The mass ratio of the thermoplastic polymer to long fiber or continuous fiber is 1:(0.11~9);

[0042] The length of the long fibers is 10-1000 mm.

[0043] In this embodiment, the long fibers or continuous fibers in the polymer composite material are oriented, and the fiber content in the polymer composite material can reach up to 90%, and the mechanical properties are better than the short fiber reinforced thermoplastic polymer composite material.

specific Embodiment approach 2

[0044] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the thermoplastic polymer is high-density polyethylene, polyethylene, polypropylene, polylactic acid, polyvinyl chloride, polylactic acid, ethylene-vinyl acetate copolymer Or one or more of engineering plastics. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0045] Embodiment 3: This embodiment is different from Embodiment 1 or Embodiment 2 in that: the long fibers and continuous fibers are natural fibers or synthetic fibers. Other steps and parameters are the same as those in Embodiment 1 or 2.

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Abstract

The invention relates to a polymer composite material and a preparation method thereof, specifically to a thermoplastic polymer composite material directionally reinforced by long fibers or continuousfibers and a preparation method thereof. The objective of the invention is to overcome difficulties in preparation of fiber-reinforced thermoplastic polymer composite materials from long fibers or continuous fibers in convention extrusion processes. The composite material is composed of long fibers or continuous fibers, and a thermoplastic polymer, wherein the long fibers or continuous fibers aredirectionally and uniformly distributed in the thermoplastic polymer. The preparation method comprises the following steps: preparing a polymer matrix, uniformly and parallelly spreading the fibers on the surface of the polymer matrix, rolling the polymer matrix to form a cylindrical or sheet-shaped preform, allowing the end parts of the fibers to face the feed inlet of an extruder, carrying outfeeding to the extruder, and then carrying out extrusion. According to the invention, the polymer matrix is used for wrapping the fibers, and the fibers are brought to the extruder in virtue of the polymer matrix so as to realize feeding and mixing. The preparation method of the invention is applicable to preparation of the thermoplastic polymer composite material directionally reinforced by the long fibers or continuous fibers.

Description

technical field [0001] The invention relates to a fiber-oriented reinforced thermoplastic polymer composite material and a preparation method thereof Background technique [0002] Fiber-reinforced thermoplastic polymer composites have high mechanical properties and strong design, and have a wide range of applications. Among them, the polymers are primary and recycled thermoplastic polymers, such as polyethylene, polypropylene, polylactic acid, polyvinyl chloride, ethylene-vinyl acetate copolymer, engineering plastics, etc.; the reinforcing fibers are divided into two types: natural fibers and artificial fibers. Natural fibers include wood fibers, bamboo fibers, cotton fibers, hemp fibers, straw fibers and other naturally occurring fibers. Natural fibers have outstanding advantages such as light weight, high strength, degradability, and environmental protection. They are used in many fields such as transportation, decoration, and garden facilities. It is widely used in China...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L97/02C08L23/12C08L27/06C08L23/08
CPCC08L23/06C08L23/12C08L27/06C08L97/02C08L2207/062C08L23/0815
Inventor 王伟宏郝建秀顿梦媛李学敏孙亚楠
Owner NORTHEAST FORESTRY UNIVERSITY
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