PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Performance, appearance, type selection, quality judgment and technical parameters of PTFE plate
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2022-12-07
Visits:
PTFE plate plate is also called PTFE plate, Teflon plate, Teflon plate, can be punched into PTFE gasket, is a good sealing material. There are two kinds of molding and turning,
The molded plate is made of polytetrafluoroethylene resin at room temperature by molding, and then sintered and cooled. Turning PTFE backing plate is PTFE resin by molding method
It is made into a blank, sintered, and then turned into a product.
Because of its reliable sealing performance, high temperature resistance, extremely low friction coefficient and chemical corrosion resistance, it is widely used in gaskets, seals and lubrication in various corrosive media.
Sliding materials, hydrocarbons, strong corrosion occasions and mechanical equipment, but also made in various frequencies used in electrical insulation parts. This paper mainly introduces the properties of PTFE plate
energy, appearance, selection, quality judgment and technical parameters.
1. performance:
1, has a strong anti-creep cold flow performance, so as to ensure the stability of the bolt tightening force in the sealing process;
2. It has good flexibility, compression resilience, high and low temperature resistance, non-aging, self-lubricating, etc;
3, has a unique ability to conform to the molding, no need to increase the pressing force, greatly extending the service life of the flange;
4, soft and easy to cut, can be cut by mechanical or manual, easy to install;
5. It is suitable for sealing the uneven surface of the flange, and has a certain compensation effect on the flange sealing surface with concave and convex marks or scratches.
2. Appearance:
1. The color of PTFE backing plate is the natural color of resin.
2, should be uniform texture, smooth appearance, no cracks, bubbles, delamination, mechanical damage, knife marks and other defects.
3. Slight cloud-like tightness is allowed.
4. No more than 1 non-metallic impurity with a diameter of 0.1-0.5mm and no more than 1 non-metallic impurity with a diameter of 0.5-2mm are allowed on an area of 10 × 10cm2.
5. The density of PTFE plate is 2.1-2.3T/m3.
Figure 1: PTFE sheet Source: Dankai
3. selection:
The first thing to consider is its geometric size. Due to the cold flow of ordinary PTFE backing plate, whether recycled or pure raw materials, that is to say, long-term application of its thick
The degree will change, and the screw will be tightly pressed for a period of time.
2. Secondly, consider the importance of sealing, whether it will bring huge losses due to leakage, such as explosion, combustion and corrosion, and other serious consequences. If so, consider good quality PTFE
Material of alkene backing plate;
3, to consider whether the PTFE plate can work in the extreme cold and temperature boundary conditions.
4. In addition, flange materials and bolts should also be taken into account;
4. quality judgment
To judge the quality of PTFE plate, it is necessary to consider the following two points:
1. In the case of sufficient sunshine, find two different grades of PTFE backing plates. Facing the sunshine, the nearly transparent plate is pure material plate, followed by B- grade plate. Good quality polytetrafluoroethylene
The vinyl pad is uniform in texture and smooth in appearance. The quality of bad cracks, bubbles, delamination, mechanical damage, knife marks and other defects.
2. Bend two identical PTFE pads by hand, compared with the more tough, the better. According to the use of working conditions to choose different grades of PTFE plate, each of which has its own
advantages, can meet the needs of different conditions.
5. technical parameters
Color: White;
Temperature range: -240 ℃ ~ 260 ℃ (instant up to 315 ℃);
Use pressure: ≤ 50bar;
PH value: 0-14;
regular size: 1250mm × 1800mm or 1524mm × 1524mm (can be customized into sealing gasket according to user requirements);
Tolerance: ± 3%;
Thickness: 1mm-5mm.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
PTFE, backing plate, sealing, quality, pure material plate, uniform texture, smooth appearance
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