PTFE, PFA, FEP, PVDF Fluoroplastic products industry experts
Brief introduction of PTFE gasket process and bulky sheet
Classification:
Industry dynamics
Author:
PFA tube little sister
Source:
Dankai
Release time:
2023-01-09
Visits:
PTFE as a sealing material has many applications. Because of its high corrosion resistance, stable physical properties, high and low temperature resistance, it has good sealing performance,
In the petroleum, chemical, pharmaceutical, electric power, steel industry has a wide range of applications. Suitable media include water, oil, acid solution, alkali solution and almost all chemical ingredients.
PTFE gasket is durable, reliable sealing performance; Dankai PTFE itself has the best corrosion resistance and aging resistance, after special processing has a good resistance
Creep resistance and cold flow resistance; long-term safe use in a wide temperature range; soft and easy to cut, can be cut by mechanical or manual, easy to install.
Figure 1: PTFE gasket Source: Network
Appearance color: white.
Applicable temperature:-180 ℃-250 ℃;
Applicable medium: PH 0-14;
regular size: 1250mm * 1800mm thick 1-5mm;
Pure plate OTH-2100;
PTFE process flow
1) raw material preparation; ingredients: pure F4 products, raw material F4 fine resin, mashed, sieved;
2) mold preparation: wipe clean with alcohol, no rust in the die, no attachments;
3) Weighing, according to the formula G = PV (where G is the feeding amount, P is the density of the preform (2.18g/cm3) and V is the volume of the product).
4) Feeding: The F4 resin is evenly distributed over the entire pressing surface.
5) Pre-forming (pressing): Calculate the gauge pressure of the press according to the formula and set the gauge pressure of the press. Pressing.
6) Demoulding and trimming: Take the semi-finished product out of the mold, and trim its surface to make its surface flat and neat. Ready for molding.
7) Sintering: Slowly put the semi-finished product into the sintering furnace, put it in an appropriate quantity, heat it up to 390 degrees for one hour, keep it warm for another hour, and start to cool down after forming, about
Four hours later, reach the indoor temperature, the finished product out of the oven, and finally complete the shaping.
Figure 2: PTFE gasket Source: Network
The bulking plate is a high sealing pad made of polytetrafluoroethylene bulking, and does not contain any binders and additives. It has strong chemical corrosion resistance; special design makes the backing plate tool
It has strong creep resistance and cold flow performance, so as to ensure the stability of the bolt tightening force during the sealing process; it has good flexibility, compression resilience, high and low temperature resistance, and is not old.
chemical, self-lubricating, etc.; soft and easy to cut, can be cut by mechanical or manual, easy to install; has a unique ability to conform to the molding, no special increase in pressing force, greatly extended
The service life of the flange. Make up for the irregular sealing surface, reliable sealing performance, especially excellent gas sealing performance.
Appearance color: white.
Applicable temperature:-180 ℃-250 ℃;
Applicable medium: PH 0-14;
regular size: 1500mm * 1500mm thick 1.5-3mm;
Users can purchase the whole piece, cut it into gaskets according to the caliber of their own equipment flanges, and can also put forward their own requirements for prefabrication and forming by suppliers.
Figure 3: PTFE gasket Source: Network
Dankai modified PTFE gasket sheet is made of inorganic material as filler, which is uniformly dissolved into PTFE raw material after deep processing. Modified PTFE and Pure Poly IV
Compared with vinyl fluoride, it has the advantages of high compression strength, wear resistance, good thermal conductivity, and reduced thermal expansion; the internal multi-directional fiber structure makes this product extremely resistant to chemical corrosion.
Performance, there is no cold flow and creep phenomenon, can maintain a reliable seal for a long time. The backing plate filler is inorganic, does not contain any adhesive, and will not be sticky with the sealing surface.
It is used repeatedly on the same sealing surface. Easy to cut, can be cut by machine or hand, easy to install. There is no aging problem, can be long-term preservation.
Appearance color: white or blue;
Applicable temperature:-180 ℃-250 ℃;
Applicable medium: PH 0-14;
regular size: 1524mm * 1524mm thick 1.5-8mm.
Users can purchase the whole piece, cut it into gaskets according to the caliber of their own equipment flanges, and can also put forward their own requirements for prefabrication and forming by suppliers.
This article is originally created by Teflon's little sister. Welcome to pay attention and take you to grow knowledge together!
Key words:
PTFE, gasket, can, wear resistance, good thermal conductivity, high temperature resistance, corrosion resistance, good sealing
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