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Formula of modified polytetrafluoroethylene sealing strip suitable for vortex vacuum pump

A technology of polytetrafluoroethylene and sealing strips, which is applied in the direction of climate sustainability, chemical instruments and methods, and other chemical processes, and can solve the problems of long-term dry friction requirements, service life that cannot meet market demand, and unfavorable components Clean and efficient transportation and other issues, to achieve high-efficiency rebound performance, prolong service life, and reduce weight

Pending Publication Date: 2022-08-02
上海佳珊赫新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there is no sealing strip that meets the service life required by customers in the market. In this application, it is extremely dependent on individual imported seal manufacturers. On the one hand, it cannot meet the long-term dry friction requirements, and the service life cannot meet market demand. On the other hand In the process of use, it is easy to grind a large amount of powder, which is not conducive to the clean and effective operation of the entire part. Therefore, we propose a modified PTFE sealing strip formula suitable for scroll vacuum pumps.

Method used

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  • Formula of modified polytetrafluoroethylene sealing strip suitable for vortex vacuum pump

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] see figure 1 , a production process for the formulation of a modified polytetrafluoroethylene sealing strip suitable for a scroll vacuum pump, comprising the following steps:

[0028] S1: Mixing and pulverizing: 82% of the suspended resin, 15% of polyether ether ketone and 3% of color masterbatch additives are placed in the pulverizer for pulverization. After the pulverization is completed, they are placed inside the mixing device for mixing. The mixing rod of the mixing device The rotating speed is 900r / min, and the mixing time is 20min to obtain mixed raw materials;

[0029] S2: extrusion molding: the mixed raw materials obtained in S1 are sent into the pressing machine, and the raw materials are extruded and formed by the pressing machine, and the pressure of the pressing machine is 18mpa to obtain the raw material blank;

[0030] S3: Oven sintering: The raw material blank obtained in S2 is sent to the oven for processing. During the oven processing, the operating t...

Embodiment 2

[0034] see figure 1 , a production process for the formulation of a modified polytetrafluoroethylene sealing strip suitable for a scroll vacuum pump, comprising the following steps:

[0035] S1: Mixing and pulverizing: 85% of suspended resin, 13% of polyether ether ketone and 2% of color masterbatch additives are placed in a pulverizer for pulverization. After pulverization, they are placed inside the mixing device for mixing. The rotating speed is 1100r / min, and the mixing time is 16min to obtain mixed raw materials;

[0036] S2: extrusion molding: the mixed raw materials obtained in S1 are sent into the pressing machine, and the raw materials are extruded and formed by the pressing machine, and the pressure of the pressing machine is 20mpa to obtain the raw material blank;

[0037] S3: Oven sintering: The raw material blank obtained in S2 is sent to the oven for processing. During the oven processing, the operating temperature is 375°C and the time is 12h to obtain the proc...

Embodiment 3

[0041] see figure 1 , a production process for the formulation of a modified polytetrafluoroethylene sealing strip suitable for a scroll vacuum pump, comprising the following steps:

[0042] S1: Mixing and pulverizing: 87% of the suspension resin, 11% of polyether ether ketone and 2% of color masterbatch additives are placed in the pulverizer for pulverization. After the pulverization is completed, they are placed inside the mixing device for mixing. The mixing rod of the mixing device The rotating speed is 1100r / min, and the mixing time is 22min to obtain mixed raw materials;

[0043] S2: extrusion molding: the mixed raw materials obtained in S1 are sent into the pressing machine, and the raw materials are extruded and formed by the pressing machine, and the pressure of the pressing machine is 21.5mpa to obtain the raw material blank;

[0044] S3: Oven sintering: The raw material blank obtained in S2 is sent to the oven for processing. During the oven processing, the operati...

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Abstract

The invention relates to the technical field of sealing strips, and discloses a modified polytetrafluoroethylene sealing strip formula suitable for a scroll vacuum pump, the sealing strip is prepared from the following raw materials: 80-90% of suspension resin, 10-15% of polyether-ether-ketone and 0.1-5% of a color master batch additive, the suspension resin is polytetrafluoroethylene suspension resin, the polyether-ether-ketone is polyether-ether-ketone, and the color master batch additive is polyetherimide. The polyether-ether-ketone is aromatic high-molecular polymer polyether-ether-ketone, the color master batch additive is a blue inorganic color master batch additive, and the sealing strip is prepared from the following raw materials: 82% of suspension resin, 15% of polyether-ether-ketone and 3% of color master batch additive, the sealing strip is prepared from the following raw materials: 85% of suspension resin, 13% of polyether-ether-ketone and 2% of a color master batch additive, and the sealing strip is prepared from the following raw materials: 87% of suspension resin, 11% of polyether-ether-ketone and 2% of the color master batch additive.

Description

technical field [0001] The invention belongs to the technical field of sealing strips, in particular to a modified polytetrafluoroethylene sealing strip formulation suitable for a scroll vacuum pump. Background technique [0002] With the rapid development of industries such as semiconductors, new materials and biopharmaceuticals, the continuous maturity of the scroll theory and the urgent requirement for a clean and oil-free vacuum environment, the scroll vacuum pump comes into being due to its unique advantages. The difference from the oil-lubricated vacuum pump is that the pump cavity does not contain any oil and liquid. Therefore, solving the seal in the pump is the key to the research of dry scroll vacuum pump. [0003] At present, there is no sealing strip that can meet the service life required by customers. In this application, it is extremely dependent on individual imported seal manufacturers. On the one hand, it cannot meet the long-term dry friction requirements,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L61/16C09K3/10
CPCC08L27/18C09K3/10C08L61/16Y02P20/10
Inventor 徐星星毛明江
Owner 上海佳珊赫新材料科技有限公司