PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Company Dynamics
23-01
Fabrication process of new nano-filter material PTFE microporous membrane for masks
The research of PTFE microporous film in China is carried out late, lagging behind developed countries such as Europe, America and Japan. At present, the production process of PTFE microporous film is calendered film method, turning film method and stretching film method.
22-12
Introduction of PTFE lining process
PTFE PTFE enjoys the reputation of "plastic king" and has extremely high chemical stability. The lining equipment processed by it is resistant to almost all strong acids, strong oxidants, reducing agents and various organic solvents, and is also suitable for a wide temperature range. Through certain processing technology improvement, the use of ≤ 2.5MPa under higher pressure can be realized. Dankai PTFE lining equipment has been more and more widely used in chemical production enterprises with high corrosion resistance requirements.
For the application of pressure, temperature and other complex conditions of the environment, the PTFE lining structure is usually targeted to be improved, such as: in the PTFE layer to join the metal mesh, can reduce the PTFE lining of thermal expansion and contraction, improve the negative pressure resistance; in the PTFE layer to join the polyethylene propylene, improve the temperature resistance and deformation resistance and so on.
PTFE lining can be divided into two kinds of loose lining and tight lining. Loose lining is generally made by winding PTFE tape on the corresponding grinding tools, sintering and forming on the grinding tools, inserting equipment after demoulding, and completing after flanging. The characteristic is that there is a gap between the steel body of the equipment and the lining PTFE plate. It is suitable for conveying pipes and reaction cylinders with small temperature change and positive pressure. The advantages are simple process, less investment and fast forming. The disadvantage is that in the environment with large negative pressure and temperature change, it is easy to cause problems such as internal collapse, bubbling and flange edge cracking of PTFE plate; in electric spark detection, the vacuum on some PTFE plate may not be detected.
Tight lining is the surface of the treated PTFE plate, the use of special adhesive, bonded to the inner wall of the steel equipment; is characterized by the equipment steel and lining PTFE plate tightly bonded, no gap; suitable for frequent changes in temperature and pressure and a large range of changes in the environment.
Figure 1: PTFE anticorrosive lining Product Source: Network
The advantages are:
1. There will be no leakage point in electric spark detection;
2. The larger volume of the overall equipment lining, reduce the sealing point;
3. Not limited by the shape of the equipment, it can be lined with various forms of equipment, such as square. The disadvantage is that the surface treatment of the inner wall of the steel body and the quality of the adhesive determine the stability of the liner.
Due to the inherent defects of the loose lining process, there are many problems after it is applied to production. The tight lining equipment can be spliced because of the lining plate, and the splicing gap is welded to make it a whole, so it is no longer restricted by the shape of the equipment. Foreign countries as early as the 1980 s on the use of tight lining process to replace the loose lining. In recent years, many domestic manufacturers have developed their own tight lining equipment technology by absorbing foreign tight lining technology. At present, China's PTFE lining technology has basically reached the international advanced level.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
22-12
Reasons for Difficult Adhesive of PTFE Plastic
The application of a material often raises the issue of bonding with other materials, of which bonding is a widely used modern technology.
22-12
Production and Fabrication of PTFE Film Pressure-sensitive Adhesive Tape
The chemical stability of PTFE makes it difficult to bond with other materials. The surface energy of PTFE is very low, the critical surface tension is only 1.85 × 10-4N/cm, and the adhesive strength of untreated surface is very low, so that when it is used as a pressure-sensitive adhesive tape substrate, if the surface is not chemically treated, the pressure-sensitive adhesive cannot be adhered at all, let alone made into pressure-sensitive adhesive tape.
22-12
Application and Characteristics of PTFE in Building Membrane
Application and Characteristics of PTFE in Building Membrane
22-12
Introduction of Teflon Film
First of all, let's talk about the application of Teflon film in the field of photovoltaic. Teflon PTFE film meets industry standards for UV resistance and weather resistance PV module backsheets.
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