Natural fiber composite board, and manufacturing method and application thereof

A technology of natural fibers and composite materials, applied in fiber processing, plant fibers, textiles and papermaking, etc., can solve the problems of difficult dispersion of natural fibers, poor impregnation effect of natural fibers and resins, etc. The effect of ensuring performance stability

Inactive Publication Date: 2014-06-11
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polarity of natural fibers is relatively high, and the general-purpose matrix resin has low polarity, or is a non-polar material, and the viscosity of the resin is very high, so when natural fibers reinforce thermoplastic resins, it is difficult for natural fibers to fully disperse. resin, and the impregnation of natural fibers with resin in composites is very poor

Method used

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  • Natural fiber composite board, and manufacturing method and application thereof
  • Natural fiber composite board, and manufacturing method and application thereof
  • Natural fiber composite board, and manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] (1) Get maleic anhydride grafted polypropylene 2.5%, get polypropylene 48.5%, after mixing uniformly, prepare 1.5 deniers, the chopped fiber material that length is 38mm, this kind chopped fiber is processed, forms strip.

[0047] (2) get 48.5% hemp strip material and the chopped fiber strip material prepared after mixing the above-mentioned maleic anhydride graft and thermoplastic resin to draw, prepare and form roving, and carry out spinning process with roving, A mixed yarn with a fineness of 2 metric counts is prepared.

[0048] (3) Sizing the prepared blended yarn once.

[0049] (4) The yarn formed by sizing is processed into a plain weave fabric by a loom.

[0050] (5) Desizing the fabric once.

[0051] (6) Spray the fabric with vinyltrimethoxysilane to form a fabric treated with a coupling agent, and the content of the coupling agent used is 0.5% of the total weight ratio.

[0052](7) Take six layers of fabrics for lamination, and the lamination direction is 0...

Embodiment 2

[0054] (1) Take 50% polypropylene to prepare chopped fiber material with 3 deniers and a length of 76 mm, and process the chopped fiber to form strips.

[0055] (2) Get 50% flax strip material and above-mentioned chopped fiber strip material and carry out drawing, prepare and form roving, carry out spinning process with roving, prepare and form the mixed yarn that fineness is 1.5 metric counts.

[0056] (3) Sizing the prepared blended yarn once.

[0057] (4) The yarn formed by sizing is processed into a plain weave fabric by a loom.

[0058] (5) Desizing the fabric once.

[0059] (6) Take six layers of fabrics for lamination, and the lamination direction is 0 degree direction. The laminated fabrics are hot-pressed at a temperature of 190° C. and a molding pressure of 8 MPa to form a natural fiber reinforced thermoplastic resin sheet. The material properties are shown in Table 1.

Embodiment 3

[0061] (1) Take 45% polylactic acid, prepare 1 denier, chopped fiber material with a length of 76 mm, and process the chopped fiber to form strips.

[0062] (2) Get 55% ramie strip material and chopped fiber strip material and carry out drawing, prepare and form roving, carry out spinning process with roving, prepare and form the mixed yarn that fineness is 36 public counts.

[0063] (3) The yarn is processed into a twill fabric by a loom.

[0064] (4) Take 21 layers of fabrics and lay them up. The laying directions are 0 / 90 degrees and placed separately. The laminated fabrics are hot-pressed at a temperature of 185°C and a molding pressure of 4MPa to form a natural fiber reinforced thermoplastic resin. sheet. The material properties are shown in Table 1.

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Abstract

The invention relates to a natural fiber composite board and a manufacturing method and application thereof. The natural fiber composite board is prepared from the following raw materials by weight: 35 to 60% of a thermoplastic resin, 30 to 55% of a natural fiber, 0 to 9% of maleic anhydride graft and 0 to 1% of a coupling agent. The procedures consisting of mixing, washing and starching, weaving, desizing and hot pressing are carried out so as to form a natural fiber reinforced thermoplastic resin board which is used for manufacturing of a mobile phone protective shell, an IPAD shell, a musical instrument, a box or a helmet. Compared with the prior art, the natural fiber composite board provided by the invention has the advantages of great strength, stable performance, effectively controllable thickness direction, etc.

Description

technical field [0001] The invention relates to the technical field of polymer modification, in particular to a natural fiber composite material plate and its manufacturing method and application. Background technique [0002] Glass fiber reinforced composite materials have been widely used in industry and the production of daily products, but the use of glass fiber for resin reinforcement also exposes many shortcomings. First of all, glass fiber is brittle and easy to break during processing. The fiber length-to-diameter ratio cannot be very large, so the reinforcing effect is limited; secondly, glass fiber will cause greater wear and tear on the equipment during processing, which will shorten the update cycle of equipment components. Glass fiber will also bring the threat of showing off to the operator. Finally, glass fiber is not degradable, and its products will pollute the environment after being discarded. [0003] In recent years, natural fiber-reinforced composite m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/12C08L67/04C08L51/06C08J5/04B29C70/34
CPCC08L23/12B29C70/34C08L23/06C08L97/02C08L2203/30C08L2205/03C08L2205/16D06M13/513D06M13/5135D06M2101/04D06M2101/20
Inventor 刘密密
Owner HEFEI GENIUS NEW MATERIALS
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