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Light sandwich-structure composite material and preparation method thereof

A composite material and sandwich technology, applied in the field of materials, can solve problems such as small bonding area, and achieve the effects of low cost, easy change of product thickness, and simple structure

Active Publication Date: 2015-05-06
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The honeycomb sandwich structure has high strength and good rigidity, but the honeycomb is an open-cell structure, the bonding area with the upper and lower panels is small, and the bonding effect is generally not as good as foam

Method used

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  • Light sandwich-structure composite material and preparation method thereof
  • Light sandwich-structure composite material and preparation method thereof
  • Light sandwich-structure composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1: With two layers of jute weft-knitted biaxial fabric as the upper and lower layers, two layers of jute weft-knitted biaxial fabric and straw core material and polypropylene staple fiber are prepared by hot pressing according to the ratio of mass ratio 1:1. High-quality composite material plate, the temperature range of hot pressing is 60°C-195°C.

[0028] The jute weft-knitted biaxially knitted fabric and the straw core material are laminated with polypropylene staple fibers at intervals, and each layer of jute fabric and straw layer are covered with a layer of polypropylene staple fibers on both sides; the hot press is heated to 60 ° C, Place the jute fabric, straw and polypropylene staple fiber laid at intervals above on a hot press, raise the temperature to 100°C, pressurize to 3MPa, keep the pressure and raise the temperature to 160°C, heat it for 10 minutes, then heat it up to 195°C, keep it warm and hold the pressure for 30 minutes After that, let it coo...

Embodiment 2

[0029] Embodiment 2: take 2 layers of jute weft-knitted biaxial fabrics as the upper and lower layers, this fabric and 2 layers of straw core material and polypropylene short fibers are hot-pressed according to the ratio of mass ratio 1: 1.5 to prepare light-weight composite material plates, The temperature range of hot pressing is 60°C-195°C.

[0030] The jute weft-knitted biaxially knitted fabric and the straw core material are laminated with polypropylene staple fibers at intervals, and each layer of jute fabric and straw layer are covered with a layer of polypropylene staple fibers on both sides; the hot press is heated to 60 ° C, Place the jute fabric, straw and polypropylene staple fiber laid at intervals above on a hot press, raise the temperature to 100°C, pressurize to 3MPa, keep the pressure and raise the temperature to 160°C, heat it for 10 minutes, then heat it up to 195°C, keep it warm and hold the pressure for 30 minutes After that, let it cool down to room tempe...

Embodiment 3

[0031] Embodiment 3: take 2 layers of jute weft-knitted biaxial fabrics as the upper and lower layers, this fabric and 2 layers of straw core material and polypropylene short fibers are hot-pressed according to the ratio of mass ratio 1: 2.3 to prepare lightweight composite material boards, The temperature range of hot pressing is 60°C-195°C.

[0032] The jute weft-knitted biaxially knitted fabric and the straw core material are laminated with polypropylene staple fibers at intervals, and each layer of jute fabric and straw layer are covered with a layer of polypropylene staple fibers on both sides; the hot press is heated to 60 ° C, Place the jute fabric, straw and polypropylene staple fiber laid at intervals above on a hot press, raise the temperature to 100°C, pressurize to 3MPa, keep the pressure and raise the temperature to 160°C, heat it for 10 minutes, then heat it up to 195°C, keep it warm and hold the pressure for 30 minutes After that, let it cool down to room temper...

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Abstract

The invention discloses a light sandwich-structure composite material and a preparation method of the light sandwich-structure composite material, belonging to the field of materials and relating to a weft knitting duel-axial fabric. The light sandwich-structure composite material takes a jute weft knitting duel-axial fabric as a surface layer and a straw core material as an intermediate layer and is prepared by performing hot pressing on the fabric and the core material and polypropylene chopped fibers. The weight of the light sandwich-structure composite material is lighter than a jute fabric reinforced polypropylene layer composite layer with the same thickness by 10-25%, the tensile strength is 23.5-50.2Mpa, and the flexural strength is 32.6-75.2Mpa. The surface layer fabric of the composite material can bring the characteristics of high strength and high modulus of yarns into full play, and simultaneously has unique excellent forming property. The sources of raw materials of a straw core layer are rich, and the straw core layer has the characteristics of low density, easiness in compression, good heat insulation, etc. The light sandwich-structure composite material can replace wood or synthetic fibers such as glass. The composite material can meet the general requirements of mechanical property; in addition, on the aspect of civil use, the light sandwich-structure composite material can be used as a non-load-carrying structure or a partial load carrying part and has vast potential for future development.

Description

technical field [0001] The invention belongs to the field of materials, in particular to a resin-based composite material. Background technique [0002] Due to the characteristics of "light weight and high strength", lightweight sandwich structure composite materials have developed rapidly in recent decades. The sandwich composite structure is vividly called "sandwich structure". This structure is generally made of three layers of materials. The upper and lower layers of this material are high-strength, high-modulus materials, and the middle layer (core material) is Thicker lightweight material. At present, the sandwich materials used for composite "sandwich" structures mainly include four categories: strong core felt, rigid foam, honeycomb and balsa wood. Rigid foam mainly includes polyvinyl chloride (PVC), polyurethane (PU), polyetherimide (PEI) and acrylonitrile-styrene (SAN or AS), polymethacrylimide (PMI), thermoplastic polystyrene Ethylene (PET), etc. Honeycomb san...

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 Patents(China)
IPC IPC(8): B32B9/02B32B9/04B32B27/02B32B27/32B32B37/06B32B37/10
Inventor 刘丽妍高立超周泽钦
Owner TIANJIN POLYTECHNIC UNIV
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