Scientific research data shows that from 2016 to 2020, in just a few years, the compound annual growth rate of the demand for PTFE base tape membranes in waste incineration, coal power, steel and cement dust removal systems exceeded 10% , some industries even exceed 20%, which shows that people attach great importance to this material.
At present, there are few studies on the uniformity of polytetrafluoroethylene film preparation, but a large number of literatures have studied the uniformity of other films formed by biaxial stretching, which has implications for the study of the uniformity of ptfe base tape films. important reference significance.
In the production of biaxially stretched PTFE base film, transverse stretching is an important and complex process, and the entire process is carried out in a continuous thermal environment.
The mono-oriented film that has been stretched longitudinally undergoes complex thermodynamic coupling deformation during the subsequent transverse stretching process, so this process is often called a black box that is difficult to analyze.
In order to fully understand, understand, and master the characteristics and influencing factors of the transverse stretching process, so as to improve the uniformity of the film, the researchers studied the deformation mechanism of the film during the transverse stretching process.
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