Gas-assisted molding glass fiber reinforced nylon 6 engineering plastic and preparation method thereof

A technology of engineering plastics and gas-assisted molding, which is applied in the field of materials, can solve problems such as difficult bonding, rough product surface, and poor fluidity, and achieve the effects of improving interface bonding, increasing mechanical properties, and overcoming anisotropy

Inactive Publication Date: 2015-12-09
NINGBO HAIYU ADVANCED MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional glass fiber-reinforced nylon 6 is not easy to combine well with the two-phase interface of glass fiber and nylon 6 and has poor fluidity, which easily leads to the phenomenon of glass fiber exposure on the surface of the product, making the surface of the product rough and blooming, thus limiting the use of this material on the opposite surface. Application on exterior parts with high requirements for smoothness or aesthetics, not suitable for gas-assisted injection molding

Method used

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  • Gas-assisted molding glass fiber reinforced nylon 6 engineering plastic and preparation method thereof
  • Gas-assisted molding glass fiber reinforced nylon 6 engineering plastic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Raw materials are taken by weighing percentages as follows: nylon 6 resin 55wt%; alkali-free glass fiber 20wt%; carbon fiber 8wt% after surface treatment; aramid fiber 8wt%; compatibilizer maleic anhydride grafted polypropylene 5wt%; 3.2wt% of maleic anhydride grafted acrylate and styrene copolymer; 10100.8wt% of antioxidant; wherein, the viscosity of the nylon 6 resin is 2.2-2.7, and the surface of the alkali-free glass fiber Coated with a graphene oxide coating with a thickness of 0.3-0.8 μm, the alkali-free glass fiber is chopped glass fiber, the length of the chopped glass fiber is 1.5-4.5 mm, and the diameter is 9-14 μm. The aramid fiber is chopped aramid fiber, the length of the chopped aramid fiber is 1-4mm, the melt index of the maleic anhydride grafted polypropylene is ≤50g / 10min, and the grafting rate is 0.5-1.5%.

[0030] Mix the weighed raw material nylon 6 resin, compatibilizer, flow modifier, and antioxidant in a high-speed mixer at high speed, and then me...

Embodiment 2

[0032] Raw materials are taken by weight percentage as follows: nylon 6 resin 60wt%; alkali-free glass fiber 20wt%; carbon fiber 5wt% after surface treatment; aramid fiber 5wt%; compatibilizer maleic anhydride grafted polyethylene 7wt%; 2.4wt% of maleic anhydride grafted acrylate and styrene copolymer; 10760.3wt% of antioxidant, 1680.3wt% of antioxidant; wherein, the viscosity of the nylon 6 resin is 2.2-2.7, and the The surface of the alkali-free glass fiber is coated with a graphene oxide coating with a thickness of 0.3-0.8 μm, and the alkali-free glass fiber is chopped glass fiber, the length of the chopped glass fiber is 1.5-4.5mm, and the diameter is 9-14 μm, the aramid fibers are chopped aramid fibers, and the length of the chopped aramid fibers is 1-4mm.

[0033] Mix the weighed raw material nylon 6 resin, compatibilizer, flow modifier, and antioxidant in a high-speed mixer at high speed, and then melt it through a twin-screw extruder. Alkali glass fiber, carbon fiber ...

Embodiment 3

[0035] Raw materials are taken by weight percentage as follows: 52wt% of nylon 6 resin; 30wt% of alkali-free glass fiber; 6wt% of carbon fiber after surface treatment; 3wt% of aramid fiber; 4wt% of compatibilizer maleic anhydride grafted polypropylene; 4.3wt% of maleic anhydride grafted acrylate and styrene copolymer; 10100.4wt% of antioxidant, 1680.3wt% of antioxidant; wherein, the viscosity of the nylon 6 resin is 2.2-2.7, and the The surface of the alkali-free glass fiber is coated with a graphene oxide coating with a thickness of 0.3-0.8 μm, and the alkali-free glass fiber is chopped glass fiber, the length of the chopped glass fiber is 1.5-4.5mm, and the diameter is 9-14 μm, the aramid fibers are chopped aramid fibers, the length of the chopped aramid fibers is 1-4mm, the melt index of the maleic anhydride grafted polypropylene is less than or equal to 50g / 10min, and the grafting rate is 0.5-1.5%.

[0036] Mix the weighed raw material nylon 6 resin, compatibilizer, flow ...

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Abstract

The invention relates to gas-assisted molding glass fiber reinforced nylon 6 engineering plastic and a preparation method thereof, and belongs to the technical field of materials. The engineering plastic is prepared from 50-65wt% of nylon 6 resin, 10-35wt% of alkali-free glass fibers, 3-10wt% of surface-treated carbon fibers, 3-10wt% of aramid fibers, 3-8wt% of compatilizer, 1-5wt% of flow modifier and 0.5-1wt% of antioxidant. The preparation method includes the steps that the nylon 6 resin, the compatilizer, the flow modifier and the antioxidant are mixed at a high speed in a high-speed mixer according to the weight percentage; the mixed raw materials are fused through a double-screw extruder, meanwhile, 10-35wt% of alkali-free glass fibers, 3-10wt% of surface-treated carbon fibers and 3-10wt% of aramid fibers are added into a glass fiber opening, and extrusion pelletization is performed to obtain the gas-assisted molding glass fiber reinforced nylon 6 engineering plastic. The engineering plastic has good physical and mechanical properties, flowability and surface smoothness, is easy to mold and can be applied to gas-assisted molding.

Description

technical field [0001] The invention relates to a gas-assisted molding glass fiber reinforced nylon 6 engineering plastic and a preparation method thereof, belonging to the field of material technology. Background technique [0002] Glass fiber reinforced nylon 6 has excellent physical and mechanical properties, oil resistance, wear resistance, easy processing, high heat distortion temperature, good chemical stability and electrical insulation, so it is widely used in automobiles, home appliances, electronics, electrical appliances and other fields . Glass fiber reinforced nylon 6 has been widely used in automobiles, such as: automobile intake manifold, cooling fan, tool box, car seat, etc. Since automobile door handles and the like are exterior parts, the requirements for the surface finish of the product are relatively high. In addition, with the improvement of cost-saving awareness and the continuous development of injection molding technology, gas-assisted injection mo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/10C08L51/06C08L51/00C08K13/06C08K9/02C08K7/14C08K7/06C08K5/134C08K5/526C08J5/06C08J5/08B29C47/92B29C48/92
CPCC08L77/02B29C48/92B29C2948/9258B29C2948/92704C08J5/06C08J5/08C08J2377/02C08K2201/003C08K2201/004C08K2201/014C08L2201/08C08L2205/02C08L2205/025C08L2205/035C08L2205/08C08L2205/16C08L77/10C08L51/06C08L51/003C08K13/06C08K9/02C08K7/14C08K7/06C08K5/1345C08K5/526
Inventor 王宁葛晓辉徐红红鲍海程孙菁联陈艳明
Owner NINGBO HAIYU ADVANCED MATERIALS TECH
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