Automatic production method of polytetrafluoroethylene (PTFE) dispersion resin

A polytetrafluoroethylene and dispersing resin technology, which is applied in the field of fluoroplastics manufacturing and production, can solve the problems of inability to carry out continuous production and a large amount of manual operation, and achieve the effects of good temperature and pressure resistance, good uniformity and long length.

Inactive Publication Date: 2013-07-24
天津市天塑科技集团有限公司技术中心
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Problems solved by technology

However, due to the particularity of PTFE, this production method cannot be used for continuous production. During the production process, it is necessary to manually control the operation status of each part of the ...

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  • Automatic production method of polytetrafluoroethylene (PTFE) dispersion resin
  • Automatic production method of polytetrafluoroethylene (PTFE) dispersion resin

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Embodiment Construction

[0023] In view of the polytetrafluoroethylene (PTFE) that can be used has multiple grades, and the polytetrafluoroethylene (PTFE) of different grades has different molecular weight distributions and characteristics, the present invention selects and uses molecular weight in 1 million-5 million, particle Dispersion resin with a diameter of 0.1-0.5 microns, together with suitable auxiliary components, constitutes a two-member mixed component, and different process formulations and corresponding process conditions are determined for different purposes. The main process includes: 1. Raw material mixing, 2. Aging and infiltration, 3. Pre-pressing molding, 4. Pushing molding, 5. Extrusion position measurement and feedback adjustment, 6. High temperature sintering, 7. Quenching treatment, 8. Speed ​​measurement and winding adjustment after sintering, 9. Finished winding. The manufacture polytetrafluoroethylene dispersion resin (PTFE) product is carried out by process below.

[0024]...

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Abstract

The invention relates to fluorine plastic manufacturing techniques and discloses an automatic production method of polytetrafluoroethylene (PTFE) dispersion resin. The automatic production method of the PTFE dispersion resin comprises the steps of PTFE raw material mixing, preforming, extrusion forming, speed and location tracking of extrudate, signal feedback for controlling an extruder, sintering forming, quenching treatment, position measurement and feedback control of rolling parts, forming and rolling. According to the invention, the PTFE dispersion resin producing technology is improved through introducing an automatic control system, so that the method for continuously, uniformly and stably producing the PTFE dispersion resin is provided.

Description

technical field [0001] The invention relates to the production technology of fluoroplastics, and relates to an automatic production method of polytetrafluoroethylene dispersion resin (PTFE). Background technique [0002] Polytetrafluoroethylene (PTFE) has the best electrical insulation, chemical stability, and corrosion resistance among all plastics, and is one of the materials with the best corrosion resistance in the world today. However, polytetrafluoroethylene dispersion resin (PTFE) has an extremely narrow phase change range and loose elastic characteristics, making it difficult to extrude or injection mold like ordinary thermoplastics. Fine powder (PTFE dispersion resin) made by emulsion polymerization, adding an appropriate organic solvent to make a paste mixture for extrusion, is a common production method for PTFE dispersion resin. However, due to the particularity of PTFE, this production method cannot be used for continuous production. During the production proce...

Claims

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Application Information

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IPC IPC(8): B29C47/92B29C67/04B29C69/02B29B11/12B29K27/18B29C48/92
CPCB29C48/92B29C2948/9258B29C2948/92704B29C2948/92895B29C2948/92933
Inventor 谢学民尹陆生段连群赵咏梅王润增李栋李智伟吴震董红霞戴靖马力强萱齐立红
Owner 天津市天塑科技集团有限公司技术中心
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