PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
What are the differences between PTFE films? What are the common quality problems?
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2022-11-14
Visits:
PTFE film is made by turning the suspended PTFE resin molding blank. The film after turning is a non-oriented film, which is rolled into 0.5mm thick by a two-roll calender.
The degree is called directional film. According to the different degree of orientation, it can be divided into orientation degree is greater than 2.0, calender is relatively high is the orientation film, orientation degree is less than 2.0, calender is relatively low is semi-oriented film.
1. Differences in product specifications
2. Differences in technical indicators
Through the calendering process, the crystallinity of the polytetrafluoroethylene film is improved, the molecular orientation is closely arranged, the void ratio is extremely small, and the mechanical strength is also significantly improved. Especially suitable for wire, cable insulation and capacitor
Media, etc., can also be used as the base material of special tape.
The thinnest PTFE film can reach 5μm, which is a good insulating material. However, due to the uneven production process, the finished product also has various quality problems.
Figure 1: PTFE film Source: Dankai
Common quality problems are as follows:
(1) Large thickness tolerance
(2) Breakdown voltage difference
(3) Orientation film when wide when narrow
Figure 2: PTFE Film Source: Dankai
(4) Wavy appearance at the edge of the film
(5) Directional film longitudinal and transverse cracks
(6) Transverse cracks in the film
(7) film with marks or scratches
In the process of purchasing and acceptance of PTFE film, we should pay attention to the above points to avoid losses.
Tip: to know more about the manufacturer, field survey of the production environment and scale, whether to use dust-free workshop for production. If you can't even reach the minimum standard of dust-free workshop, do you think you can still make it?
High quality PTFE film products?
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
Film, PTFE, Calendered, Crack, Transverse, Insulating Material, Large Thickness Tolerance
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