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Polyamide material with stable melt and anti-chloride solution feature and preparation method thereof

A chloride and polyamide technology, applied in the field of polyamide materials and their preparation, can solve the problems of poor calcium chloride resistance, unstable melt, stable adverse effects on the mechanical properties of materials, etc., and achieves stable production and processing flow, Excellent resistance to chloride salt corrosion, and the effect of improving the strength of the resin solution

Active Publication Date: 2016-07-06
上海日之升科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The calcium chloride resistance of the obtained polyamide material is poor and cannot meet the requirements of practical applications; in addition, direct blending of short-chain and long-chain polyamides is prone to melt instability, which affects the granulation-injection molding process or the mechanical properties of the material. adverse effects on stability
[0005] However, there is no report about a kind of polyamide material with stable melt and chloride solution resistance and its preparation method.

Method used

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  • Polyamide material with stable melt and anti-chloride solution feature and preparation method thereof
  • Polyamide material with stable melt and anti-chloride solution feature and preparation method thereof
  • Polyamide material with stable melt and anti-chloride solution feature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Nylon was dried at 110°C for 2h.

[0037] (2) Weigh 100 parts of PA66 (relative molecular weight 15000-20000), PA61010 parts (relative molecular weight 6000-10000), 0.5 part epoxy-terminated polybutadiene premixed uniformly, and then 0.3 parts of antioxidant and 0.3 part of lubricant Blend into the premix to form a homogeneous mixture;

[0038] (3) Add the mixture from the barrel of the first section of the twin-screw extruder, add 10 parts of glass fiber through the glass fiber port, control the speed at 1100r / min, the temperature at 260-270℃, and carry out extrusion granulation. After extrusion, it is cut into pellets in subcooled water.

[0039] (4) Dry the cut particles and injection molding at 260-275°C. test.

Embodiment 2

[0041] (1) Dry the nylon at 110°C for 2 hours.

[0042] (2) Weigh 100 parts of PA66 (relative molecular weight 15000-30000), PA61045 parts (relative molecular weight 6000-18000), 3 parts epoxy-terminated polybutadiene, and then mix 1.2 parts of antioxidant and 2 parts of lubricant. Blend into the premix to form a homogeneous mixture;

[0043] (3) Add the mixture from the barrel of the first section of the twin-screw extruder, add 50 parts of glass fiber from the first glass fiber port, control the speed of 1100r / min, and the temperature of 260-270°C for extrusion granulation. The material is extruded and cut into pellets in cold water.

[0044] (4) Dry the cut particles and injection molding at 260-275°C. test.

Embodiment 3

[0046] (1) Nylon was dried at 110°C for 2h.

[0047] (2) Weigh 100 parts of PA66 (relative molecular weight 15000-30000), PA61020 parts (relative molecular weight 6000-10000), 1.5 parts epoxy-terminated polybutadiene, and then premix 0.7 parts of antioxidant and 1.4 parts of lubricant Blend into the premix to form a homogeneous mixture;

[0048] (3) Add the mixture from the barrel of the first section of the twin-screw extruder, add 30 parts of glass fiber from the barrel of the fourth section of the twin-screw extruder, control the speed at 1100r / min, and the temperature at 260-270°C for extrusion granulation , The material is extruded and cut into pellets in cold water.

[0049] (4) Dry the cut particles and injection molding at 260-275°C. test.

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Abstract

The invention relates to a polyamide material with stable melt and anti-chloride solution feature and a preparation method thereof. The polyamide material consists of the following components in parts by weight: 100 parts of nylon 66, 10-45 parts of long-chain nylon, 10-50 parts of glass fiber, 0.5-3 parts of liquid melting enhancer, 0.3-1.2 parts of antioxidant and 0.3-2 parts of lubricant. The preparation method comprises the following steps: uniformly premixing the nylon 66, long-chain nylon and liquid melting enhancer; adding the antioxidant and lubricant and mixing again, and adding the mixture through a main feed port of a twin-screw extruder; adding the glass fiber through a glass fiber port, wherein the rotation speed is controlled at 800-1200r / min and the temperature is controlled at 250-285 DEG C; and performing extrusion granulation to obtain the polyamide material. The material has excellent mechanical property, melt stability, chloride ion corrosion resistance and static pressure resistance and is particularly suitable for water supply components with relatively high requirement on chemical corrosion resistance such as high-pressure water guns, high-pressure water pipes, shower heads and spray heads.

Description

Technical field [0001] The invention relates to the technical field of glass fiber reinforced nylon composite materials, in particular to a polyamide material with stable melt and resistance to chloride solutions and a preparation method thereof. Background technique [0002] Nylon is one of the five major engineering plastics. It has excellent mechanical properties, wear resistance, thermal stability and fatigue resistance. It is widely used in automobiles, electrical appliances, mechanical parts and other fields. But at the same time, nylon also has shortcomings such as strong hygroscopicity and poor impact resistance, especially the tolerance to chloride salts (calcium chloride, zinc chloride, etc.). Chloride salt is the main component of deicing agent. It is mostly used on snowy roads in the north to prevent road icing and car skidding. Once nylon comes into contact with deicing agent, its mechanical properties will be greatly reduced, which will bring great traffic safety. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/06C08L47/00C08K9/00C08K7/14
CPCC08K2201/003C08L77/06C08L2205/025C08L2205/03C08L47/00C08K9/00C08K7/14
Inventor 周军杰张强陈光伟孟成铭杨涛陈晓东
Owner 上海日之升科技有限公司
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