What is DuPont Teflon three-proof additive?
DuPont Teflon (Teflon), friends who trust the outdoor circle are all familiar with this term. DuPont Teflon has a wide range of applications. Here we mainly talk about the so-called “Teflon water repellent” treatment that we often come into contact with. Everyone has seen it. Nowadays, many outdoor work clothes, sleeping bags and other product descriptions will have words such as “surface DuPont Teflon treatment”, and a Teflon hangtag is attached to the product (see hangtag display). This hangtag shows that the fabrics of these products adopt American DuPont’s Teflon finishing agent has been treated to be water-repellent (three-proof). This hangtag is authorized and provided by DuPont to verify the authenticity. So how can Teflon achieve certain water blocking performance? What is the process of Teflon treatment of work clothes fabric? Today, I will give you a brief introduction based on some information I have collected and some knowledge about DuPont Teflon finishing in fabric dyeing and finishing companies.
First, let’s take a brief look at Teflon. Teflon is a chemical agent developed by DuPont in the United States. It is a hydrocarbon resin that contains organic fluorine substances. Its chemical properties are relatively stable and it has high and low temperature resistance. Strong, it is currently mainly used in the fabric industry for the so-called “three-proof” finishing of fabrics (water-blocking, oil-proof, and stain removal).
The water-repellent principle of Teflon treatment is that fabrics prepared and finished with Teflon finishing agents have lower surface energy. Due to the low surface energy of the material and non-stick properties, low surface energy fabrics have the above-mentioned ” The characteristics and effectiveness of “Three Defenses”. Teflon makes use of the fluorine-containing active agent in the material (the production process of organic fluorine fabric finishing agent requires the use of ammonium perfluorooctanoate, which is currently being questioned about its safety and has not yet been concluded. This is a surfactant. In view of the use of outdoor equipment, Use environment, we don’t need to panic) ingredients to reduce the surface energy of the fabric, so that the fabric can achieve a certain water-blocking function. As for the complex surface energy theory, let it be discussed, we will not discuss it.
The well-known silicone coating water-repellent treatment of cotton tents also uses silicone materials to reduce the surface of the fabric to achieve a water-repellent effect. This is also the principle of the water-repellent agent used by some friends to maintain work clothes and shoes. .
Fabrics finished with Teflon do not have permanent water-repellent resistance, but gradually lose the so-called “three-proof” effect as the number of cleanings increases. It is understood that the “three-proof” effect will generally disappear after 4 cleanings. There is some decrease. This is because after the fabric is soaked and scrubbed in water, the Teflon component contained in the fabric will be gradually lost. Coupled with the action of microorganisms in nature, the water-repellent group molecules on the surface of the fabric will be rearranged, making the surface of the fabric more durable. will gradually increase. As the surface energy of the fabric increases, the “three defenses” effect decreases, and the fabric loses the so-called “three defenses” effectiveness. These characteristics tell us that we should not use soaking and scrubbing to clean fabrics that have been treated with water-repellent treatment.
Teflon is a registered trademark of DuPont in the United States. Currently, domestic dyeing and finishing companies that use Teflon finishing agents for “three-proof” finishing of fabrics must be authorized by DuPont. After the products pass the test, they will be issued a special Teflon logo tag. According to the export Depending on the country and region, there are generally two types of hangtags with Shikoku characters and hangtags with Six Kingdoms characters. As far as I know, the Teflon “three-proof” finishing process and technology are not complicated. After the three main finishing processes of pre-finishing, padding, and drying, the Teflon finishing of the fabric costs about the commercial price of a piece of workwear. The proportion can be said to be very low.
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