Unlock instant, AI-driven research and patent intelligence for your innovation.

Polytetrafluoroethylene film and method for producing same

A technology of polytetrafluoroethylene and manufacturing methods, which is applied in the direction of manufacturing tools, film/sheet adhesives, flat products, etc., can solve the problems of limiting the application and service life of PTFE films, and achieve excellent flatness and production efficiency High, wear-resistant effect

Active Publication Date: 2020-12-22
NITTO DENKO SHANGHAI SONGJIANG +1
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prior art, the PTFE film obtained by melt molding, cutting or extrusion molding and calendering has the problem that high strength and low shrinkage cannot be satisfied at the same time. Generally, it is a film with high strength and high shrinkage or low strength and low shrinkage, which greatly limits Application and service life of PTFE film

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polytetrafluoroethylene film and method for producing same
  • Polytetrafluoroethylene film and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The PTFE powder (62X, manufactured by DuPont, USA) was molded in a sintering furnace at 380° C. for 15 hours to obtain a molded product. Then, the obtained molded product was cut on a precision numerical control machine tool to obtain a cut film, and the thickness of the cut film was 180 μm. Next, the obtained cut film was rolled at 240° C. with a calender at a rolling speed of 1.5 m / min to obtain a PTFE film with a thickness of 60 μm. The thickness ratio of the cut film to the PTFE film, that is, the thickness ratio of the cut film before rolling to the PTFE film obtained after rolling was 3 / 1.

Embodiment 2

[0081] The PTFE powder (62X, manufactured by DuPont, USA) was molded in a sintering furnace at 380° C. for 15 hours to obtain a molded product. Then, the obtained molded product was cut on a precision numerical control machine tool to obtain a cut film, and the thickness of the cut film was 240 μm. Next, the obtained cut film was rolled at 240° C. with a calender at a rolling speed of 1.5 m / min to obtain a PTFE film with a thickness of 60 μm. The thickness ratio of the cut film to the PTFE film, that is, the thickness ratio of the cut film before rolling to the PTFE film obtained after rolling was 4 / 1.

Embodiment 3

[0083] The PTFE powder (62X, manufactured by DuPont, USA) was molded in a sintering furnace at 380° C. for 15 hours to obtain a molded product. Then, the obtained molded product was cut on a precision numerical control machine tool to obtain a cut film, and the thickness of the cut film was 240 μm. Next, the obtained cut film was rolled at 260° C. with a calender at a rolling speed of 1.5 m / min to obtain a PTFE film with a thickness of 60 μm. The thickness ratio of the cut film to the PTFE film, that is, the thickness ratio of the cut film before rolling to the PTFE film obtained after rolling was 4 / 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a polytetrafluoroethylene film and a method for producing same. The polytetrafluoroethylene film provided by the invention has excellent properties of high strength and low shrinkage rate at high temperature, and solves the problem that the application range of a common polytetrafluoroethylene film on the market is greatly limited due to high strength and high shrinkage rateor low strength and low shrinkage rate. The polytetrafluoroethylene film disclosed by the invention is good in flatness, strong in wear resistance and high in strength, and can also effectively inhibit thermal shrinkage. In addition, the producing method of the polytetrafluoroethylene film is simple and feasible, and the production efficiency is high.

Description

technical field [0001] The invention relates to a polytetrafluoroethylene film, a manufacturing method of the polytetrafluoroethylene film and an adhesive tape containing the polytetrafluoroethylene film. Background technique [0002] It is known to use polytetrafluoroethylene (PTFE) to obtain various PTFE films through melt molding cutting or extrusion molding calendering. These known PTFE films are widely used in various fields, for example, they can be used as base materials for adhesive tapes. However, in the prior art, the PTFE film obtained by melt molding cutting or extrusion molding and calendering has the problem that high strength and low shrinkage cannot be satisfied at the same time. Generally, it is a film with high strength and high shrinkage or low strength and low shrinkage, which greatly limits The application and service life of PTFE film. Contents of the invention [0003] The problem to be solved by the invention [0004] The present invention was m...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08J5/18C09J7/24B29D7/01C08L27/18
CPCC08J5/18C09J7/245B29D7/01C08J2327/18C09J2427/006C09J7/24B29C55/02B29C67/04C09J2301/312B29K2027/18B29C2793/00B29K2995/0077B29C43/24B29C43/26C08L27/18B23Q15/08B29C43/46
Inventor 李旭田松渡边義宣
Owner NITTO DENKO SHANGHAI SONGJIANG