Teflon-polybenzoate compounded product and preparation method thereof

A technology of polytetrafluoroethylene and composite products, applied in the field of polytetrafluoroethylene-polyphenylester composite products and their preparation, can solve the problems of low limit PV value, non-abrasion resistance and easy creep of polytetrafluoroethylene products

Active Publication Date: 2012-10-03
深圳市明鑫高分子技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, aiming at the problems that pure polytetrafluoroethylene products are not wear-resistant, easy to creep, and have low limit PV value, it is necessary to provide a kind of wear-resistant, creep-resistant, relatively high limit PV value of polytetrafluoroethylene-polyethylene Phenyl ester compound product and preparation method thereof

Method used

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  • Teflon-polybenzoate compounded product and preparation method thereof
  • Teflon-polybenzoate compounded product and preparation method thereof
  • Teflon-polybenzoate compounded product and preparation method thereof

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preparation example Construction

[0030] Such as figure 1 The preparation method of above-mentioned polytetrafluoroethylene-polyphenyl ester composite product shown, comprises the steps:

[0031] S10. Provide polytetrafluoroethylene and polyphenylene.

[0032] Among them, the number average molecular weight of polytetrafluoroethylene is greater than 10 million, and the thermal weight loss of polyphenylene is less than 0.5%.

[0033] The provided polytetrafluoroethylene and polyphenylene need to be pretreated, and the pretreatment is generally selected to be placed at 21°C~25°C for 36h~50h. Special attention is not to store at room temperature below 19°C, because 19°C is the crystal transition temperature of polytetrafluoroethylene.

[0034] S20. According to the mass fraction, make 15-25 parts of polyphenylene into a paste with water and stir evenly, then add 75-85 parts of polytetrafluoroethylene dispersion prepared by polytetrafluoroethylene, and stir until the polyphenylene The ester and polytetrafluoroe...

Embodiment 1

[0078] Dimensions and appearance: outer diameter: 50.1mm; height: 102mm; the appearance is uniform in color, free of impurities, cracks and any mechanical damage.

[0079] Physical and mechanical properties: tensile strength: 13.8Mpa; elongation at break 272%; compressive strength 36Mpa; compressive elastic modulus 821Mpa; hardness (Shore D) 63, friction coefficient 0.22; average wear coefficient 2.4g / h (×10 -5 ); Density 1.96g / cm 3 .

Embodiment 2

[0081] Dimensions and appearance: outer diameter: 20.05mm; height: 102mm; the appearance is uniform in color, free of impurities, cracks and any mechanical damage.

[0082] Physical and mechanical properties: tensile strength: 14.7Mpa; elongation at break 285%; compressive strength 35Mpa; compressive elastic modulus 850Mpa; hardness (Shore D) 64, friction coefficient 0.23; average wear coefficient 2.2g / h (×10 -5 ); Density 1.97g / cm 3 .

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Abstract

The invention discloses a teflon-polybenzoate compounded product. The teflon-polybenzoate compounded product consists of 75 to 85 mass parts of teflon and 15 to 25 parts of polybenzoate; the number mean molecular weight of teflon is more than 10 million; and the thermal weight loss of polybenzoate is less than 0.5 percent. According to the teflon-polybenzoate compounded product, polybenzoate which has the advantages of high temperature resistance, wear resistance, creep resistance, radiation resistance, self-lubricating, insulation, heat conduction and the like is added and is arranged in a shape of fiber web along the gaps of teflon, the teflon and the polybenzoate which has the shape of fiber web are molten and adhered integrally, and the defects of no wear resistance and low limit pressure / velocity (PV) value of teflon are overcome by using the good characteristics of polybenzoate. Compared with a pure teflon product, the teflon-polybenzoate compounded product has the advantages of wear resistance, creep resistance and high limit PV value. The invention also provides a preparation method for the teflon-polybenzoate compounded product.

Description

【Technical field】 [0001] The invention relates to the field of composite resins, in particular to a polytetrafluoroethylene-polyphenylester composite product and a preparation method thereof. 【Background technique】 [0002] Polytetrafluoroethylene (PTFE) is a synthetic polymer material that uses fluorine to replace all hydrogen atoms in polyethylene. PTFE products have a wide temperature range (-180°C~+260°C), low friction coefficient, good self-lubricating performance, low water absorption, excellent electrical properties (independent of frequency, not affected by temperature), chemical resistance Good drug performance and other advantages. [0003] However, pure PTFE products are not wear-resistant, easy to creep, and have a low limit PV value. 【Content of invention】 [0004] Based on this, aiming at the problems that pure polytetrafluoroethylene products are not wear-resistant, easy to creep, and have low limit PV value, it is necessary to provide a kind of wear-resis...

Claims

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Application Information

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IPC IPC(8): C08L27/18C08L67/03
Inventor 成鹏陈敦迅
Owner 深圳市明鑫高分子技术有限公司
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