Polytetrafluoroethylene regenerative powder, process for producing same and bar produced thereby

A technology of polytetrafluoroethylene and recycled powder, which is applied in the direction of plastic recycling and recycling technology, can solve the problems of high water content in powder, influence of subsequent processes, low molecular activity, etc., and achieves no foaming and uniform texture. Effect

Active Publication Date: 2007-08-15
ZHEJIANG SONGHUA NEW MATERIAL CO LTD
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Problems solved by technology

[0005] In order to solve the technical defects that the above-mentioned polytetrafluoroethylene powder is regenerated, the molecular activity is low, the shrinkage ratio increases, and the water content in the powder is relatively high, which affects

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  • Polytetrafluoroethylene regenerative powder, process for producing same and bar produced thereby

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[0023] The specific implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but it is not limited by the embodiments.

[0024] A method for preparing recycled polytetrafluoroethylene powder as shown in Figure 1, except for the hot press extrusion process shown in Figure 1, includes the following steps:

[0025] 1. Impurity removal treatment. Cut large pieces of PTFE waste, wash, spin dry, and then scrape off the surface stains.

[0026] 2. Crush the powder. Cut the above-mentioned massive PTFE waste into strips and grind them into powder with a diamond wheel.

[0027] 3. Drying. The polytetrafluoroethylene powder obtained above is uniformly dried in an oven, and the oven temperature is set at 100-200°C.

[0028] 4. Sieving. Sieve the powder with an iron sieve to make the powder particles evenly reach 100-350 mesh.

[0029] 5. Sintering. The powder obtained above is sintered in an oven, the temperature of the oven is ...

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Abstract

The invention relates to a method for preparing politef waste regenerate powder and relative rod. The inventive method comprises that 1, washing and removing foreign material, 2, breaking, grinding, screening, 3, sintering, 4, cutting bars, 5, preparing particles, 6, packing and storing. With inventive method, the politef regenerate powder can reach the property of original powder, to produce variable politef products. In addition, the powder can be thermally extruded into politef regenerate rod, with uniform mass and non foam condition.

Description

technical field [0001] The invention relates to the field of regeneration and utilization of polytetrafluoroethylene waste, in particular to a polytetrafluoroethylene waste regenerated powder, a preparation method thereof and a rod prepared therefrom. Background technique [0002] PTFE plastic is an engineering plastic with excellent performance. It has good self-lubricating performance, low friction coefficient, high and low temperature resistance, corrosion resistance, good insulation performance and non-stickiness. It is widely used in machinery, electronics, petroleum, Chemical, food, light industry and other industries. Due to the non-natural degradability of PTFE plastics, discarded PTFE plastics will cause great pollution to the environment. Therefore, how to recycle polytetrafluoroethylene waste and turn waste into treasure has become a research direction. [0003] Existing polytetrafluoroethylene waste regeneration technology discloses a kind of regeneration polyt...

Claims

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Application Information

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IPC IPC(8): B29B9/02B29B17/00B29B17/04B29C67/04B29C47/00B29K27/18
CPCY02W30/62
Inventor 杨根源
Owner ZHEJIANG SONGHUA NEW MATERIAL CO LTD
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