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Polyamide material for welding parts and method for its preparation

A technology of welding parts and polyamide, applied in the field of plastic processing, can solve problems such as labor protection, inability to meet the development needs of the modern plastic industry, and environmental pollution

Active Publication Date: 2019-05-03
深圳市前海宇昕科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Bonding has the advantages of connecting dissimilar materials, avoiding stress concentration, not causing deformation, simple process, and low price. However, due to the manual operation, the production efficiency is low, and the adhesive also has certain toxicity, causing environmental pollution and labor costs. issues of protection
Therefore, the above two connection processes can no longer meet the development needs of the modern plastics industry.

Method used

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  • Polyamide material for welding parts and method for its preparation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A method for preparing a polyamide material for welding parts, comprising the steps of:

[0041] (1) 80 parts by weight of PA, 20 parts by weight of PC, 10.8 parts by weight of MBS graft copolymer, 1 part by weight of lanthanum hexaboride, 0.45 parts by weight of bis(2,4-di-tert-butylphenol) pentaerythritol diphosphite Esters, 0.2 parts by weight thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 0.6 parts by weight 2-(3,5-di-tert-butyl- 2-Hydroxyphenyl) benzotriazole was added to a mixing mixer at 80° C. and stirred at a speed of 300 rpm for 10 minutes and mixed evenly to obtain a mixture;

[0042] (2) Add the mixture from the feeding port of the twin-screw extruder. The extruder is divided into nine temperature zones. The temperature is 230°C, the temperature in the fifth zone is 230°C, the temperature in the sixth zone is 235°C, the temperature in the seventh zone is 240°C, the temperature in the eighth zone is 240°C, the temperature in the ninth ...

Embodiment 2

[0044] A method for preparing a polyamide material for welding parts, comprising the steps of:

[0045](1) Mix lanthanum hexaboride and stearic acid at a mass ratio of 1:0.2 in a high-speed mixer at a temperature of 82°C at a speed of 500 rpm for 20 minutes and mix evenly to obtain modified lanthanum hexaboride;

[0046] (2) 80 parts by weight of PA, 20 parts by weight of PC, 10.8 parts by weight of MBS graft copolymer, 1 part by weight of modified lanthanum hexaboride, 0.45 parts by weight of bis(2,4-di-tert-butylphenol) pentaerythritol di Phosphite, 0.2 parts by weight thiodiethylenebis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 0.6 parts by weight 2-(3,5-di-tert-butyl Base-2-hydroxyphenyl) benzotriazole was added to a mixing mixer at 80°C with a rotation speed of 300 rpm and stirred for 10 minutes to mix evenly to obtain a mixture;

[0047] (3) Add the mixture from the feeding port of the twin-screw extruder. The extruder is divided into nine temperature zones. Th...

Embodiment 3

[0049] A method for preparing a polyamide material for welding parts, comprising the steps of:

[0050] (1) Mix lanthanum hexaboride and stearic acid at a mass ratio of 1:0.2 in a high-speed mixer at a temperature of 82°C at a speed of 500 rpm for 20 minutes and mix evenly to obtain modified lanthanum hexaboride;

[0051] (2) 80 parts by weight of PA, 20 parts by weight of PC, 10.8 parts by weight of MBS graft copolymer, 1 part by weight of modified lanthanum hexaboride, 0.45 parts by weight of bis(2,4-di-tert-butylphenol) pentaerythritol di Phosphite, 0.2 parts by weight of thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate], 0.6 parts by weight of 2,2-thiobis(4- tert-octylphenol) n-butylamine nickel salt was added to a mixing mixer at a speed of 300 rpm at 80°C and stirred for 10 minutes to mix evenly to obtain a mixture;

[0052] (3) Add the mixture from the feeding port of the twin-screw extruder. The extruder is divided into nine temperature zones. The ...

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Abstract

The invention discloses a polyamide material for a welded part and a preparation method of the polyamide material. The preparation method comprises the following steps: (1) uniformly mixing PA (Polyamide) and PC (Polycarbonate) in a mixing stirring machine so as to obtain a mixed material; and (2) adding the mixed material from a double-screw extruder feeding hole, performing melting extrusion, performing thermal cutting so as to obtain granules, and feeding the granules into a cabin through air cylinder wind. According to the polyamide material for the welded part and the preparation method of the polyamide material, the laser transmission welding process, raw material properties and polyamide material properties are deeply studied, interaction of laser beams and plastic in the laser transmission welding process is analyzed, including transmission and absorption functions of plastic to laser, properties of plastic which is heated, molten, cooled and cured, and the like, and on the basis of theoretic study, the welding strength of the plastic is improved as much as possible by preferably selecting raw materials, and then the polyamide material which is high in strength, high in quality, attractive in shape and applicable to welding parts is finally prepared.

Description

technical field [0001] The invention relates to the technical field of plastic processing, in particular to a polyamide material used for welding parts and a preparation method thereof. Background technique [0002] In the plastic product industry, due to injection molding, extrusion processing and other reasons, a considerable number of plastic products with complex shapes and structures cannot be processed at one time, which requires a process to seamlessly connect multiple parts together. There are usually three methods of connecting plastics and their composites: mechanical connection, adhesive bonding and welding. [0003] Mechanical fastening is the riveting or press-fit connection of plastic parts by using fastening tools such as screws and snap rings. The method is simple, but the sealing performance of the joint is poor and the strength is low. Bonding is to firmly connect materials together by means of the adhesive force produced by adhesives on the surface of pl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L77/00C08L69/00C08K13/02C08K5/526C08K3/38C08K5/3475C08K5/375C08K13/06C08K9/04C08K5/3492C08K5/132
CPCC08K2201/014C08L77/00C08L2205/03C08L2205/035C08L2205/06C08L2207/53C08L69/00C08K13/02C08K5/526C08K3/38C08K5/3475C08K5/375C08K13/06C08K5/3492C08K5/132
Inventor 饶君豪
Owner 深圳市前海宇昕科技有限公司