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Composition of long-fiber enhanced thermoplastic mould pressing material and using method thereof

A technology for reinforcing thermoplastic and molding materials, applied in the field of material processing, which can solve the problem of high unit cost

Active Publication Date: 2017-07-21
湖州艾历克工业材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the reinforcing fiber is sheared and damaged in the extruder, it can only maintain a length of about 1 cm in the end, so the performance needs to be improved
In addition, compared with the long fiber online mixing process, the unit cost of using long fiber reinforced pellets is relatively high

Method used

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  • Composition of long-fiber enhanced thermoplastic mould pressing material and using method thereof
  • Composition of long-fiber enhanced thermoplastic mould pressing material and using method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Embodiment 1, a long-fiber reinforced thermoplastic molding material, the molding material is a granular material obtained by cutting continuous reinforced fiber roving and thermoplastic resin formula through extrusion, melting and infiltration, and the thermoplastic resin formula is in parts by weight Calculated, the components included are: 100 parts of homopolypropylene: the isotacticity of homopolypropylene is 95%, and the melt flow index MI of homopolypropylene is 15g / 10min; 10 parts of maleic anhydride grafted polypropylene : Its graft rate is 0.9%, and its melt flow index MI is 120g / 10min; 8 parts of active calcium carbonate: the mesh number of calcium carbonate is 1200 mesh; 10 parts of linear low density polyethylene LLDPE: the melt flow index of its LLDPE is 2g / 10min.

[0036] The components of the above-mentioned thermoplastic resin formula are prepared by weight, mixed in a low-speed mixer for 15 minutes, extruded through an extruder, and directly mixed with...

Embodiment 2

[0038]Embodiment 2, a long-fiber reinforced thermoplastic molding material, the molding material is a granular material obtained by cutting continuous reinforced fiber roving and thermoplastic resin formula through extrusion, melting and infiltration, and the thermoplastic resin formula is in parts by weight Calculated, the components included are: 100 parts of homopolypropylene: the isotacticity of homopolypropylene is 95%, and the melt flow index MI of homopolypropylene is 15g / 10min; 5 parts of maleic anhydride grafted polypropylene : Its graft rate is 0.9%, and its melt flow index MI is 200g / 10min; 10 parts of active calcium carbonate: the mesh number of calcium carbonate is 1200 mesh; 6 parts of ethylene-vinyl acetate copolymer EVA: its VA content is 18% ; 2 parts of polyethylene wax: its melting point is 110°C.

[0039] The components of the above-mentioned thermoplastic resin formula are prepared by weight, mixed in a low-speed mixer for 15 minutes, extruded through an e...

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Abstract

The invention relates to a composition of a long-fiber enhanced thermoplastic mould pressing material and a using method thereof. The mould pressing material is prepared by cutting continuous enhanced fiber rough yarn and thermoplastic resin formula after extrusion, fusion and immersion, and acquiring granular materials; preheating the mould pressing material to melt; striking off and scrapping to gather the material to be a material group; placing the material group in a hot press module; compounding the die and shaping to acquire the mould pressing product. The thermoplastic resin formula is prepared from, by weight, 100 parts of base resin of which fusion flowing index MI is 4-60 g / 10 min, 4-40 parts of polymer of grafting reaction, 1-20 parts of inorganic mineral powder, 0.1-10 parts of lubricant, and 3-25 parts of toughening component. The mould pressing material has high intensity and flexibility, outstanding thermal stability, good flow mold flowing property; after melting, the resin and fiber are flowed together and cannot be separated; therefore, the fiber can be evenly dispersed by slightly scrapping; the plasticizing dispersion can be carried out without an extruder.

Description

[0001] Technical field: [0002] The invention relates to the field of material processing, and more specifically relates to a composition of a long-fiber reinforced thermoplastic molding material and a method for using the same. [0003] Background technique: [0004] Adding reinforcing fibers to polymer materials for compression molding is an effective way to obtain large-size, high-strength products. Due to the advantages of environmental protection, good toughness, and short molding cycle, thermoplastic molding materials mainly made of polypropylene and other plastics are gradually replacing Traditional SMC and other thermosetting materials. [0005] The typical process of thermoplastic molding materials includes preheating the raw materials to a molten state, then putting them into a pair of metal molds whose temperature is lower than the melting point of the raw material resins, quickly compressing and filling the molds, and demoulding after cooling to obtain products. F...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L51/06C08L23/08C08K3/26C08K7/14C08J5/04B29C70/46B29C70/50
CPCB29C70/465B29C70/50C08J5/043C08J2323/12C08J2423/08C08J2451/06C08K2003/265C08K2201/003C08L23/12C08L2205/02C08L2205/03C08L51/06C08L23/0815C08K3/26C08K7/14C08L23/0853
Inventor 费峡
Owner 湖州艾历克工业材料有限公司