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Food-grade polyamide composite and preparation method thereof

A composite material, food-grade technology, applied in the polymer field, can solve the problems of the difference in the horizontal and vertical shrinkage of the composite material, unfavorable assembly of finished parts, low thermal deformation temperature, etc., to achieve good rigidity and toughness, good flow performance, high impact strength. Effect

Inactive Publication Date: 2017-10-10
ORINKO NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Nylon 6 (PA6) is a crystalline thermoplastic resin with excellent comprehensive properties. It has excellent electrical insulation, elongation, dimensional stability and chemical corrosion resistance, and has self-extinguishing, flame retardant, non-toxic, colorable, etc. Advantages, but the unmodified PA6 material cannot be directly applied to the functional parts of small household appliances due to its low heat distortion temperature and insufficient strength. It must be modified before it can be used.
At present, most people add glass fiber or mineral powder to increase the thermal deformation temperature and strength of PA6. However, due to the orientation of the glass fiber, the horizontal and vertical shrinkage of the composite material is quite different. , there will be warping deformation, which is not conducive to the assembly of finished parts

Method used

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  • Food-grade polyamide composite and preparation method thereof
  • Food-grade polyamide composite and preparation method thereof
  • Food-grade polyamide composite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A food-grade polyamide composite material is prepared by the following components by weight:

[0026]

[0027] A preparation method of a food-grade polyamide composite material specifically includes the following steps:

[0028] (1), weigh 78.4 parts of food-grade polyamide, 20 parts of food-grade talcum powder, 1 part of food-grade toughening agent, 0.1 part of β-(3,5-di-tert-butyl-4-hydroxybenzene base) octadecyl propionate (antioxidant 1076), 0.2 parts of tris[2.4-di-tert-butylphenyl] phosphite (antioxidant 168) and 0.3 parts of modified ethylene bis stearamide and Add together to the mixer and mix at high speed for 2 minutes;

[0029] (2), put the mixed material obtained in step (1) into a parallel twin-screw extruder to melt, and after being extruded, enter a high-gloss mold and sequentially undergo water cooling, traction, and pelletizing to obtain a food-grade polyamide composite material; The barrel temperature of the extruder is 210-260°C, the screw speed ...

Embodiment 2

[0031] A food-grade polyamide composite material is prepared by the following components by weight:

[0032]

[0033] A preparation method of a food-grade polyamide composite material is the same as in Example 1.

Embodiment 3

[0035] A food-grade polyamide composite material is prepared by the following components by weight:

[0036]

[0037] A preparation method of a food-grade polyamide composite material is the same as in Example 1.

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Abstract

The invention discloses a food-grade polyamide composite. The composite is prepared from components in parts by weight as follows: 50-80 parts of food-grade PA6 resin, 20-40 parts of food-grade talcum powder, 1-5 parts of a food-grade toughening agent, 0.2-1 part of an antioxidant and 0.1-1 part of a lubricant. The prepared food-grade polyamide composite can meet the FDA food-grade requirement and has good impact strength and mechanical performance; the surface of the prepared food-grade polyamide composite can have a good high-gloss mirror surface effect by the aid of a high-gloss mold during preparation, meanwhile, the size stability is greatly improved, the molding shrinkage is 0.7%-1%, and the requirement of modern home appliances for food-grade materials is met.

Description

technical field [0001] The invention relates to the technical field of polymers, in particular to a food-grade polyamide composite material and a preparation method thereof. Background technique [0002] Small household appliances have already become a necessity in modern society. With the continuous improvement of people's living standards, the requirements for food-grade materials are also getting higher and higher. For example, the inner cover of a pressure cooker is mainly made of modified polypropylene or nylon. Due to the The use environment of the parts is above 103°C and will be exposed to water vapor at the same time. Therefore, it is necessary to ensure that the heat-resistant temperature of the material is above 103°C, which meets the requirements of food-grade materials. [0003] Nylon 6 (PA6) is a crystalline thermoplastic resin with excellent comprehensive properties. It has excellent electrical insulation, elongation, dimensional stability and chemical corrosi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L51/06C08K13/06C08K3/34C08K5/134C08K5/526C08K5/20
CPCC08L77/02C08L51/06C08K13/06C08K3/34C08K5/1345C08K5/526C08K5/20
Inventor 彭耀范保林吕志勇徐元元李荣群
Owner ORINKO NEW MATERIAL CO LTD
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