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Polytetrafluoroethylene composite isolation material, preparation method and self-adhesive asphalt waterproof coiled material

A technology of polytetrafluoroethylene and polytetrafluoroethylene film, which is applied in the field of release material preparation, can solve the problems of anti-deformation, poor anti-aging ability, accelerated aging rate of self-adhesive asphalt, poor appearance and stability, etc. Good sticking effect, reduced degree of deformation and aging, and enhanced anti-aging ability

Pending Publication Date: 2021-03-26
BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the self-adhesive asphalt release material has the following problems: the release material has poor deformation resistance and anti-aging ability. Contact, the greater the deformation resistance of the substrate itself after contact, the worse the appearance and stability will be, and it will also easily form yellowing and reduce mechanical properties after high temperature, sunlight and long-term storage
However, when used as a waterproof release material, it will accelerate the contact between self-adhesive asphalt and air, thereby accelerating the aging rate of self-adhesive asphalt

Method used

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  • Polytetrafluoroethylene composite isolation material, preparation method and self-adhesive asphalt waterproof coiled material
  • Polytetrafluoroethylene composite isolation material, preparation method and self-adhesive asphalt waterproof coiled material
  • Polytetrafluoroethylene composite isolation material, preparation method and self-adhesive asphalt waterproof coiled material

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preparation example Construction

[0036] The third aspect of the present invention provides a preparation method of the polytetrafluoroethylene composite insulation material, the method comprising the following steps:

[0037] S1: PP / PE film is prepared by extrusion blow molding or casting method;

[0038] S2: apply the adhesive on the modified polytetrafluoroethylene film and dry it;

[0039] S3: Cover the PP / PE film prepared in step S1 on the modified polytetrafluoroethylene film treated in step S2, and undergo pressing, bonding, cooling and shaping to obtain the polytetrafluoroethylene composite isolation material.

[0040] According to the present invention, preferably, in step S3, the temperature of the pressing and bonding treatment is 50°C-80°C.

Embodiment 1

[0049] This embodiment provides a polytetrafluoroethylene composite isolation material, such as figure 1 As shown, the isolation material sequentially includes a PP film 1, an adhesive 2 and a modified polytetrafluoroethylene film 3, and the modified polytetrafluoroethylene film 3 is a polytetrafluoroethylene film modified by fluorosilicon polymer modified silicone oil , the adhesive 2 is an acrylic adhesive.

[0050] The modified polytetrafluoroethylene film 3 is prepared by a method comprising the following steps: mixing polytetrafluoroethylene resin with the fluorosilicon polymer-modified silicone oil, compacting, extruding, calendering, and biaxially stretching to obtain The modified polytetrafluoroethylene membrane 3.

[0051] Wherein, the mass ratio of the polytetrafluoroethylene resin to the fluorosilicon polymer modified silicone oil is 97:3; the viscosity of the fluorosilicon polymer modified silicone oil is 100-100000mPa.S;

[0052] The fluorine-containing substitu...

Embodiment 2

[0055] This embodiment provides a polytetrafluoroethylene composite isolation material, such as figure 1 As shown, the isolation material sequentially includes a PE film 1, an adhesive 2 and a modified polytetrafluoroethylene film 3, and the modified polytetrafluoroethylene film 3 is a polytetrafluoroethylene film modified by fluorosilicon polymer modified silicone oil , the adhesive 2 is an acrylic adhesive.

[0056] The modified polytetrafluoroethylene film 3 is prepared by a method comprising the following steps: mixing polytetrafluoroethylene resin with the fluorosilicon polymer-modified silicone oil, compacting, extruding, calendering, and biaxially stretching to obtain The modified polytetrafluoroethylene membrane 3.

[0057] Wherein, the mass ratio of the polytetrafluoroethylene resin to the fluorosilicon polymer modified silicone oil is 97:3; the viscosity of the fluorosilicon polymer modified silicone oil is 100-100000mPa.S;

[0058] The fluorine-containing substitu...

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Abstract

The invention belongs to the field of preparation of release materials for waterproof coiled materials, and discloses a polytetrafluoroethylene composite isolation material, a preparation method and aself-adhesive asphalt waterproof coiled material. The isolation material sequentially comprises a PP / PE film, an adhesive and a modified polytetrafluoroethylene film, wherein the modified polytetrafluoroethylene film is a polytetrafluoroethylene film modified by fluorosilicone polymer modified silicone oil. The polytetrafluoroethylene composite isolation material can be applied to preparation ofa self-adhesive asphalt waterproof coiled material. The polytetrafluoroethylene composite isolation material obtained by compounding the modified polytetrafluoroethylene film and the conventional PP or PE film has the advantages of greatly reduced deformation and aging degree, enhanced aging resistance, favorable isolation effect, favorable anti-sticking effect and high water resistance and gas barrier property.

Description

technical field [0001] The invention belongs to the field of preparation of release materials used in waterproof coiled materials, and in particular relates to a polytetrafluoroethylene composite isolation material and a preparation method thereof, and a self-adhesive asphalt waterproof coiled material. Background technique [0002] The release materials used for self-adhesive bitumen waterproofing membrane include silicon-coated release paper, silicon-coated release film, etc., especially silicon-coated release film. A layer of silicone oil is coated on the substrate by heat-setting or light-setting, so as to realize the release effect between the silicon-coated side and the self-adhesive asphalt. The film substrate provides a silicone oil attachment carrier, and the anti-adhesive release effect mainly depends on the anti-adhesive property of the silicone oil itself. [0003] In the self-adhesive asphalt waterproofing membrane, the factors to evaluate the application of an...

Claims

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Application Information

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IPC IPC(8): B32B27/32B32B7/12B32B27/08B32B33/00B29D7/01
CPCB32B27/322B32B27/32B32B7/12B32B27/08B32B33/00B29D7/01B32B2307/73B32B2307/7242B32B2307/552B32B2250/242B32B2250/02
Inventor 苏长泳刘欢吴士玮
Owner BEIJING ORIENTAL YUHONG WATERPROOF TECH CO LTD