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Method for using recycled nylon for preparation of polyamide powder

A technology of polyamide powder and recycled nylon, which is applied in the field of advanced rapid manufacturing, can solve problems that are not suitable for large-scale industrial applications, and achieve the effects of solving the shortage of raw materials, high economic benefits, and avoiding secondary pollution

Active Publication Date: 2016-05-11
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nylon 6 and nylon 66 are difficult to dissolve with alcohol due to the strong hydrogen bond polarity, and can only be dissolved with strong acids such as formic acid and concentrated sulfuric acid.
This strong acid is not suitable for large-scale industrial applications as a solvent, and the safety of operation and corrosion to equipment are currently unsolvable problems

Method used

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  • Method for using recycled nylon for preparation of polyamide powder
  • Method for using recycled nylon for preparation of polyamide powder
  • Method for using recycled nylon for preparation of polyamide powder

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with specific examples.

[0033] (1) Raw materials used in the experiment

[0034] Recycled nylon: waste tire nylon 6 cord material and nylon 66 product crushed material, produced by Shenzhen Yejia Metal Plastic Recycling Resource Recycling Company.

[0035] Chain extender: styrene-maleic anhydride copolymer and styrene-propylene oxide copolymer, produced by BASF.

[0036] Antioxidant: the composition of antioxidant 1098 and antioxidant 168, the mass ratio is 1:1, produced by BASF Ciba, Germany.

[0037] Nucleating agent: nano-silica, Beijing Deke Shimadzu Technology Co., Ltd.; N,N'-dicyclohexyl-2,6-naphthalene dicarboxamide, produced by Shanxi Chemical Industry Research Institute.

[0038] Enhancer: nano-montmorillonite, produced by American NANOMER Company.

[0039] Smooth release agent: stearyl erucamide, produced by British Croda Company.

[0040] Solvent: polyethylene glycol, molecular weight ...

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Abstract

The present invention provides a method for using recycled nylon for preparation of polyamide powder, the method is as follows: recycled nylon 6 or nylon 66, a chain extender, a reinforcing agent, a nucleating agent and an antioxidant are mixed, and melt-extruded at 200-240 DEG C to obtain nylon chips; and the nylon chips and a smooth release agent are dissolved in a solvent, then stirred for 1-3 hours at 180-240 DEG C, cooled to precipitate a solid, dried and then pulverized to obtain the polyamide powder. Compared with a product with no added chain extender, melt flow index is increased, and mechanical properties are better. The present invention further provides application of the polyamide powder in a selective laser sintering process, and a prepared laser sintered sample strip has better impact strength.

Description

technical field [0001] The invention relates to a method for preparing polyamide powder by recycling nylon, which belongs to the field of advanced rapid manufacturing. Background technique [0002] Selective laser sintering (selective lasers intering, SLS) is a rapid prototyping technology that uses laser sintering powder materials to shape. SLS technology adopts the principle of discrete stacking forming, and directly forms solid powder materials into three-dimensional solid parts by means of computer-aided design and manufacturing, which is not affected by the complexity of the molded parts. SLS can form a variety of materials, including polymers, metals and ceramics. The biggest advantage of SLS is that it has a wide selection of materials, such as nylon, wax, ABS (terpolymer of acrylonitrile, butadiene and styrene), resin coated sand (coated sand), polycarbonate (Polycarbonates, PC) , metal and ceramic powders can be used as sintering objects. Compared with metal and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L77/06C08K13/02C08K3/34B29C67/04
Inventor 董穆张师军刘建叶邵静波高达利杨庆泉邹浩郭鹏尹华张丽英吕芸李杰
Owner CHINA PETROLEUM & CHEM CORP
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