PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Difference between FEP tube and PTFE tube
Classification:
Industry dynamics
Author:
Teflon tube little sister
Source:
Teflon tube little sister
Release time:
2004-01-09
Visits:
1. PTFE Tube Profile. PTFE is also called PTFE: ordinary PTFE tube is white and opaque, mainly there are pipes, hoses, pipe lining, braided reinforced pipe, etc.
PTFE tube has excellent resistance to high and low temperature performance and superior chemical resistance, can transport temperature up to 260 ℃ liquid or gas, and high chemical purity, more suitable for a wide range of continuous working temperature requirements.
PTFE tube by virtue of its excellent electrical properties also make it a more suitable material in the field of electronics and electrical engineering, mainly used for electrical insulation sheath, chemical transport, heat exchanger, medical urinary catheter and surgical vascular bypass. PFA is also called tetrafluoroethylene: the physical properties, electrical properties and chemical properties of PFA tube are similar to polytetrafluoroethylene.
So the main difference between the two is that PFA is a melt-processable thermoplastic. The PFA tube has excellent stress crack resistance and bending life, but the penetration performance is not as good as PTFE. PFA tube metal ion content is very low, and at higher temperatures can maintain strong mechanical strength and burst pressure. Its chemical purity meets FDA requirements and its temperature resistance is as high as 260 ℃. small make up in this recommend we buy PFA hose oh!
Figure 1:PFA tube Source: Shenzhen Dankai
2. FEP tubes for a wide range of applications
FEP pipe, as the name suggests, FEP spiral pipe is a spiral pipe made of fluorinated ethylene propylene copolymer. It has corrosion resistance, wear resistance, high temperature resistance, insulation, so it is generally used to make high temperature wire, cable insulation, anti-corrosion equipment, sealing materials, pump valve casing and chemical containers.
FEP straight tubes include FEP transparent tubes and FEP heat shrinkable tubes, which can be used as tubes for full-body single-ended light-emitting single-core optical fibers. Heat exchanger, vapor piping; Pipe for full-package fluoroplastic O-ring; It can also be used as high-purity reagent delivery pipe. Various corrosive media (harsh solvents) delivery pipelines, wire and cable sheaths of various frequencies, slot insulation pipes, etc.
FEP straight tube temperature resistance and low temperature is very good, because it is a kind of corrosion resistance, wear resistance is very good made of fluorine plastic, weather resistance, fire resistance, high oxygen index, water absorption, radiation resistance is very good. And FEP straight tube can be widely used in aerospace, instrumentation, medical and pharmaceutical, electronic appliances, post and telecommunications, petrochemical, metallurgical power, household appliances, lighting and other fields.
Nursing Application Skills of 3. FEP Tube
FEP tube is also a typical plastic product, because the material of these products is special, so the daily use of special care. To know that the FEP tube is made by the inflation process, in its application process, what important factors need to be determined?
The formed FEP tube is easily affected by temperature, so try not to expose it to direct sunlight, so as not to accelerate its aging due to the effect of ultraviolet rays. At the same time, it is necessary to avoid hot and cold, so as to avoid shortening the service life of FEP tube due to thermal expansion and contraction.
Not only can the FEP tube be placed in a place where it is too cold, too hot, and sunny, it cannot be placed in a place where it is humid and air is not circulating, which will also reduce its quality. If the FEP tube has not been used for a long time, it must be carefully checked before use to prevent the adverse consequences caused by cracks.
In addition to determining the appropriate process parameters, FEP tube inflation also need to consider other factors, first of all to choose the correct process, if the appearance of the requirements are not high, do not require roundness, then can choose continuous inflation process.
Figure 2:FEP tube Source: Shenzhen Dankai
At the same time, the influence of the crystallinity of the base tube on the inflation should be fully considered. As FEP is a crystalline fluoroplastic, with the increase of crystallinity, the elastic modulus and hardness will increase to varying degrees, while the tensile strength, elongation and flex resistance will decrease accordingly. This is very disadvantageous in the production of heat-shrinkable tubes, because high tensile strength and elongation are required for the blown base tube.
In addition, there are appropriate extrusion process conditions, which is the key factor to improve the FEP tube inflation rate, it is recommended to use a smaller stretch ratio, which helps to improve the transverse strength of the pipe, so that the inflation rate can be improved.
Various properties of FEP tube F-46
Chemical resistance
The chemical resistance of F-46 is similar to that of polytetrafluoroethylene and has excellent chemical resistance. In addition to reacting with fluorine at high temperatures, molten alkali metals, etc., it is not corroded when in contact with other chemicals.
Mechanical properties
Compared with PTFE, F-46 hardness and tensile strength are slightly improved, and the friction coefficient is slightly larger than PTFE. At room temperature, F-46 has good creep resistance; but when the temperature is higher than 100 ℃, the creep resistance is not as good as PTFE.
Other performance
F-46 resin has very good oxidation resistance in the atmosphere and high atmospheric stability. The radiation resistance of F-46 is better than that of polytetrafluoroethylene and slightly inferior to that of polyethylene. In air and at room temperature, the minimum absorbed dose at which the F-46 begins to change in performance is 105-106rad? 103-104Gy, so it can be used as a radiation-resistant material.
Shenzhen Dankai Technology Co., Ltd. (ShenZhen DanKai Technology Co., Ltd.), whose predecessor was the Fluoroplastic Material Factory of Dongguan Dandi Insulation Material Co., Ltd. established in 1998, specializes in the research and development, production and sales of FEP, PFA, PTFE and other fluoroplastic tube rod sheet membrane products and other insulation materials. The company has international standards of senior R & D team and the introduction of foreign fluorine plastic products production line. Some fluoroplastic products through ISO9001, SGS, FDA certification, Huawei, Foxconn, the United States, ZTE, Intel, AirTAC and other domestic and foreign cooperation customers fully affirmed. The company's main products are: ① pipes: Ptfe pipes, Fep pipes, Pfa pipes, Pvdf pipes; ② Heat shrinkable tubes: Ptfe heat shrinkable tubes, Fep heat shrinkable tubes, Pfa heat shrinkable tubes, Pvdf heat shrinkable tubes; ③ Plate rod film: Ptfe plate rod film, Feep plate rod film, Pfa plate rod film, Pvdf plate rod film, etc. PE: PE, special, spiral tube, spring tube, rotary cutting tube, welding rod, tee, straight, gasket, joint, cone rod, flared tube, sealing tube, braided tube, corrugated tube, etc. At the same time can be customized according to customer requirements processing production of various specifications of fluorine plastic products.
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