Wear resistant polytetrafluoroethylene material and preparation method thereof

A technology of polytetrafluoroethylene and wear-resistant materials, which is applied in the field of polytetrafluoroethylene preparation, can solve the problems of low tensile strength, low elongation at break, high wear of polytetrafluoroethylene, etc., and achieve good self-lubricating properties, low shrinkage effect

Inactive Publication Date: 2015-09-09
苏州市德莱尔建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the above technical problems, the present application provides a polytetrafluoroethylene wear-resistant material and its preparation method to solve the existing technical problems of high wear, low tensile strength and low elongation at break of polytetrafluoroethylene

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Put polytetrafluoroethylene, aluminum oxide, bronze powder, silicon dioxide and glass fiber into the reaction kettle and heat to 50°C, stir for 20min at a stirring speed of 100r / min, add the remaining raw materials, raise the temperature to 70°C, and stir for 30min, The stirring speed is 200r / min.

[0024] Put the mixed material into a twin-screw extruder for extrusion, the barrel temperature is 170°C, 180°C, 185°C, 190°C, 195°C and 200°C, the screw speed is 50r / min, the parison is pre-pressed, and the pressure is 45MPa , holding pressure for 30s, sintering and forming: 370°C, heat preservation for 1h.

[0025] The tensile strength of the product is 27MPa, the elongation at break is 300%; the Shore hardness is 60, the wear amount is 0.005mg; the relative density is 2.6, and the wear scar width is 3.5mm / h.

[0026] Example 2:

Embodiment 2

[0028] Put polytetrafluoroethylene, aluminum oxide, bronze powder, silicon dioxide and glass fiber into the reactor and heat to 70°C, stir for 40min at a stirring speed of 200r / min, add the remaining raw materials, heat up to 90°C, stir for 50min, The stirring speed is 400r / min.

[0029] Put the mixed material into a twin-screw extruder for extrusion, the barrel temperature is 170°C, 180°C, 185°C, 190°C, 195°C and 200°C, the screw speed is 60r / min, the parison is pre-pressed, and the pressure is 65MPa , holding pressure for 50s, sintering and molding: 390°C, heat preservation for 1h.

[0030] The tensile strength of the product is 28MPa, the elongation at break is 305%; the Shore hardness is 65, the wear amount is 0.004mg; the relative density is 2.6, and the wear scar width is 3.5mm / h.

[0031] Embodiment 3:

Embodiment 3

[0033] Put polytetrafluoroethylene, aluminum oxide, bronze powder, silicon dioxide and glass fiber into the reaction kettle and heat to 50°C, stir for 20min at a stirring speed of 100r / min, add the remaining raw materials, raise the temperature to 70°C, and stir for 30min, The stirring speed is 200r / min.

[0034] Put the mixed material into a twin-screw extruder for extrusion, the barrel temperature is 170°C, 180°C, 185°C, 190°C, 195°C and 200°C, the screw speed is 50r / min, the parison is pre-pressed, and the pressure is 50MPa , holding pressure for 35s, sintering and forming: 375°C, heat preservation for 1h.

[0035] The tensile strength of the product is 30MPa, the elongation at break is 310%; the Shore hardness is 70, the wear amount is 0.003mg; the relative density is 2.7, and the wear scar width is 3.5mm / h.

[0036] Embodiment 4:

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Abstract

The application discloses a wear resistant polytetrafluoroethylene material and a preparation method thereof. The method comprises steps of: preparing polytetrafluoroethylene, aluminum oxide, bronze powder, silica, glass fiber, LCP, a coupling agent, graphite, molybdenum disulfide, GF, a flame retardant, UHMWPA, POM, PC and nano-titanium dioxide in parts by weight; mixing the substances; and extruding the mixture. For a product, the tensile strength is 27-32 MPa, and the breaking elongation is 300-320%; the Shore hardness is 60-80, and the abrasion amount is 0.001-0.005 mg; and the relative density is 2.6-2.8, and the wear width is 3.4-3.5 mm/h.

Description

technical field [0001] The application belongs to the field of polytetrafluoroethylene preparation, and in particular relates to a polytetrafluoroethylene wear-resistant material and a preparation method thereof. Background technique [0002] Polytetrafluoroethylene (Polytetrafluoroethylene, commonly known as "non-stick coating" or "easy-to-clean wok material"; is a synthetic polymer material that uses fluorine to replace all hydrogen atoms in polyethylene. This material has anti-acid It is resistant to alkali and various organic solvents, and is almost insoluble in all solvents. At the same time, polytetrafluoroethylene has the characteristics of high temperature resistance, and its friction coefficient is extremely low, so it can be used for lubrication and has become an easy-to-clean The ideal coating for the inner layer of wok and water pipe. The relative molecular mass of polytetrafluoroethylene is relatively large, the low one is hundreds of thousands, the high one is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/18C08L59/00C08L69/00C08L77/00C08K13/04C08K7/14C08K3/08C08K3/36C08K3/22C08K3/04C08K3/30C08K3/32B29C47/92B29C48/92
CPCC08L27/18B29C48/92B29C2948/92209C08K2201/011C08L2205/035C08L59/00C08L69/00C08L77/00C08K13/04C08K7/14C08K2003/085C08K3/36C08K2003/2227C08K3/04C08K2003/3009C08K2003/323C08K3/2279C08K2003/2237
Inventor 计慷
Owner 苏州市德莱尔建材科技有限公司
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