PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
A brief introduction to the production process and application of polytetrafluoroethylene microporous membrane
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2023-01-06
Visits:
Dankai PTFE film is mainly divided into two kinds: microporous membrane and turning membrane. The biggest difference between the two is that the microporous membrane is breathable, which is produced by two-way stretching. Turning film is cut out by lathe
Come on, it's airtight. This section mainly talks about PTFE microporous membrane. Polytetrafluoroethylene (ptfe) microporous film is made of polytetrafluoroethylene resin particles as raw material, after expansion and stretching
The formation of a microporous film, it is also divided into the following:
1. Air filter membrane
Dankai polytetrafluoroethylene filter membrane can be used for atmospheric dust removal, air purification, etc. The pore size of the membrane can be controlled to 0.2um, and the porosity can reach more than 88%, which is similar to needle felt, mechanism cloth and non-woven fabric.
Cloth, glass fiber and other filter materials are compounded to obtain coated filter material with surface filtration performance. PTFE coated filter material has the characteristics of high peel strength, large air permeability and uniform pore size distribution.
Point. As a dust bag or pleated dust filter cartridge installed in the dust removal equipment, it will quickly and effectively intercept ultra-fine dust calculated in microns, and the dust removal efficiency can reach more than 99.99%,
The service life of up to 3 years, air permeability of up to 3-6 m/min, is currently the world's most advanced air filtration materials, a variety of vacuum cleaners, air filter, air purification equipment, high efficiency air
The best choice for gas filters, etc.
Figure 1: PTFE film source: network
Thickness: 5um-15um;
Air permeability: 80-100L/㎡;
Width: ≤ 1800mm;
Resistance: ≤ 80Pa;
Efficiency: 99.99 per cent;
2. Waterproof and moisture permeable microporous membrane
Dankai PTFE waterproof and moisture permeable microporous membrane is made by two-way stretching through a special process. The surface of the membrane can reach billions of micropores per square inch, and the diameter of each micropore (0.1um-
0.5um) is less than the minimum value (20um-100un) of the smallest light fog in water molecules, and much larger than the molecular diameter of water vapor (0.0003um-0.0004um), which can make water vapor pass through
And water droplets can not pass through, the use of this microporous structure can achieve excellent waterproof and moisture permeability function; in addition, because the hole is extremely small and longitudinal non-standard bending arrangement, so that the wind can not pass through,
Thus it has the characteristics of windproof and good warmth retention. The film has been continuously improved since its inception, with special treatment on PTFE film, which greatly improves its firmness and durability.
After being compounded with other fabrics, it is widely used in military clothing, medical clothing, leisure clothing, fire protection, anti-biochemical, anti-virus, immersion operations and other special protective clothing, outdoor sports clothing,
Shoes, hats, gloves and other accessories and sleeping bags, tents and other materials.
Figure 2: PTFE film source: network
Technical parameters are as follows:
Thickness: 20um-50um;
Moisture permeability: 16000g/㎡ ± 24hr;
Hydrostatic pressure: 6000mm;
Anti-ultraviolet: 97℉;
Width: ≤ 1700mm;
Weight: 5-10g/m2;
3. PTFE bubble point membrane
It uses polytetrafluoroethylene (ptfe) as raw material, after puffing and stretching to form a microporous film, which is covered with a special process on various fabrics and substrates, becoming a new
Type filter material, the membrane pore size is small, about 0.2-0.5 m, uniform distribution, large porosity, while maintaining air circulation, can filter all dust particles, including bacteria, up.
To advanced purification and ventilation purposes, it is widely used in pharmaceutical, biochemical, microelectronics and laboratory supplies and other fields.
Technical parameters:
Bubble point of thickness width;
30um-50um 1600mm ≥ 1kg/cm2 ( 5.3 m/s 127PA) 。
Figure 3: PTFE film source: network
PTFE film is made of suspended PTFE resin by molding, sintering, cooling into a blank, and then turning, calendering. The film turned into a non-oriented film, not
The oriented film is calendered to form an oriented film. The unoriented film was calendered 1.1-1.8 times to the semi-oriented film. Dankai PTFE film is used as capacitor dielectric and conductor.
Edge, electrical instrument insulation, sealing gasket.
Production process of polytetrafluoroethylene film
PTFE color film is made of suspended PTFE resin to add a certain amount of colorant after molding, sintering to make blanks and then turning, calendering to make red, green, blue,
Yellow, purple, brown, black, orange, white and other 13 colors of PTFE oriented or non-oriented color film. PTFE color film, although added a certain amount of colorant, still
Good electrical insulation, suitable for insulation and classification identification of wires, cables and electrical devices.
Application range of PTFE film
PTFE activation film is a film made of PTFE film, filled film and color film, and then treated by surface activation. Products to join the pigment, glass fiber, carbon
Fiber, graphite, bronze powder and other fillers, after activation treatment to further improve the performance, can be combined with rubber, metal, etc., can also be made of special tape, to meet the requirements of the design.
Widely used in light industry, military, aerospace, oil and other fields. The film has the advantages of the most significant anti-voltage strength and breakdown voltage. Used for capacitor dielectric, as wire insulation.
Edge, electrical instrument insulation, sealing gasket. Polytetrafluoroethylene turning film calender by hot roll rolling orientation of a kind of oriented film, its high crystallinity, molecular orientation tight.
Tightly arranged, the void ratio is small, so the PTFE film has a greater increase, especially the voltage strength is more obvious.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
PTFE, film, microporous, orientation, with, dust removal, filtration, color, insulation
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