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Low-shrinkage low water absorption nylon 6 composite material and preparation and application thereof

A technology of low water absorption and composite materials, applied in the field of modified plastics, can solve the problems of polyamide thermal deformation temperature drop, different horizontal and vertical shrinkage of materials, and low filling content, so as to improve bonding force, improve mechanical properties, and high talc The effect of powder content filling

Active Publication Date: 2015-11-04
GUANGZHOU SUPER DRAGON ENG PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the above inventions provide effective solutions for reducing polyamide water absorption and improving its dimensional stability, there are still some deficiencies: (1) the addition of orientation filling (especially glass fiber) materials will cause the difference in material horizontal and vertical shrinkage , causing warping; (2) The addition of styrene resin brings about a significant drop in the heat distortion temperature of polyamide; (3) The low filling content is not conducive to the acquisition of low shrinkage materials

Method used

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  • Low-shrinkage low water absorption nylon 6 composite material and preparation and application thereof
  • Low-shrinkage low water absorption nylon 6 composite material and preparation and application thereof
  • Low-shrinkage low water absorption nylon 6 composite material and preparation and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0055] A preparation method of nylon 6 composite material with low shrinkage rate and low water absorption rate, comprising the steps of:

[0056] (1) Preparation of talcum powder masterbatch with PA12 as the matrix: prepare raw materials according to the composition and proportion of talc powder masterbatch 1 in Table 1, and then weigh PA12, coupling agent, antioxidant, lubricant and half Add talcum powder into a pressurized overturning mixer and knead it into a mass. Control the temperature of the mixing room at 160°C, the screw speed at 40r / min, and the mixing time for 15 minutes; Add it into the internal mixer, and then banbury for 15 minutes, as a spare material;

[0057] The spare material is sent to the hopper of the single-screw extruder through the conveyor belt, melted, kneaded and extruded by the single-screw extruder, and the talcum powder masterbatch based on PA12 is made through air-cooling, grinding and pelletizing; The rotating speed of the single-screw extrud...

Embodiment 2

[0060] A preparation method of nylon 6 composite material with low shrinkage rate and low water absorption rate, comprising the steps of:

[0061] (1) Preparation of talcum powder masterbatch with PA12 as the matrix: prepare raw materials according to the composition and proportion of talc powder masterbatch 1 in Table 1, and then weigh PA12, coupling agent, antioxidant, lubricant and half Add talcum powder into a pressurized overturning mixer and knead it into a mass. Control the temperature of the mixing room at 200°C, the screw speed at 80r / min, and the mixing time for 5 minutes; Add it to the internal mixer, and then banbury for 5 minutes, as a spare material;

[0062] The spare material is sent to the hopper of the single-screw extruder through the conveyor belt, melted, kneaded and extruded by the single-screw extruder, and the talcum powder masterbatch based on PA12 is made through air-cooling, grinding and pelletizing; The rotating speed of the single-screw extruder i...

Embodiment 3

[0065] A preparation method of nylon 6 composite material with low shrinkage rate and low water absorption rate, comprising the steps of:

[0066] (1) Preparation of talcum powder masterbatch with PA12 as the matrix: prepare raw materials according to the composition and proportion of talc powder masterbatch 1 in Table 1, and then weigh PA12, coupling agent, antioxidant, lubricant and half Add talcum powder into a pressurized overturning mixer and knead it into a mass. Control the temperature of the mixing room at 180°C, the screw speed at 100r / min, and the mixing time for 8 minutes; Add it into the internal mixer, and then banbury for 8 minutes, as a spare material;

[0067] The spare material is sent to the hopper of the single-screw extruder through the conveyor belt, melted, kneaded and extruded by the single-screw extruder, and the talcum powder masterbatch based on PA12 is made through air-cooling, grinding and pelletizing; The rotating speed of the single-screw extrude...

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Abstract

The invention discloses a low-shrinkage low water absorption nylon 6 composite material and preparation and application thereof. The nylon 6 composite material is prepared from 14-40% of nylon 6, 20-30% of talcum powder masterbatch taking PA12 as a matrix, 25-35% of talcum powder, 5-15% of polyphenyl ether, 2-4% of compatilizer and 2-8% of flexibilizer. The preparation method of the low-shrinkage low water absorption nylon 6 composite material comprises the steps that talcum powder masterbatch is prepared; the prepared talcum powder masterbatch, the nylon 6, the polyphenyl ether, the talcum powder, the compatilizer and the flexibilizer are mixed together, and the low-shrinkage low water absorption nylon 6 composite material is prepared. According to the low-shrinkage low water absorption nylon 6 composite material and the preparation and application thereof, part talcum powder filling adopts a masterbatch form to add, dust pollution is reduced, and high filling of high mesh talcum powder in the nylon 6 is achieved; meanwhile, the polyphenyl ether is added, and the low shrinkage and the low water absorption of the nylon 6 are further reduced. According to the low-shrinkage low water absorption nylon 6 composite material and the preparation and application thereof, the technique is simple, the processing performance is good, and the prepared nylon sis has excellent low shrinkage and excellent low water absorption.

Description

technical field [0001] The invention belongs to the field of modified plastics, and in particular relates to a nylon 6 composite material with low shrinkage rate and low water absorption rate and its preparation and application. Background technique [0002] Nylon 6 (PA6) is a translucent or opaque milky white semi-crystalline resin. It has high rigidity and toughness in a wide temperature range, and its wear resistance, creep resistance and oil resistance are good, and it is widely used in many fields. However, due to the presence of high-density hydrophilic amide groups (-NHCO-), PA6 has a strong water absorption rate. At 23 ° C and a relative humidity of 50%, its equilibrium water absorption rate is about 2.5%; when the relative humidity When it is 100%, its equilibrium water absorption rate is as high as 10%. After PA6 absorbs water, its mechanical properties, electrical properties and other properties have undergone significant changes, reducing the safety and service...

Claims

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Application Information

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IPC IPC(8): C08L77/02C08L71/12C08K13/02C08K3/34C08K5/18C08L51/06C08K5/526C08K5/103C08J3/22
CPCC08J3/226C08J2377/02C08J2477/02C08L77/02C08L2201/08C08L2205/035C08L71/12C08L51/06C08K13/02C08K3/34C08K5/103C08K5/18C08K5/526
Inventor 郝建鑫黄泽彬郝源增任萍
Owner GUANGZHOU SUPER DRAGON ENG PLASTICS
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