Many people who don’t know about non-woven bags ask questions. How can they be waterproof when they are obviously made of cloth? The editor will now answer this question for those who ask, what is a waterproof non-woven bag.
I believe everyone who has been in contact with non-woven bags knows that there are several types of bags in non-woven bags. In ordinary words, there is a kind of bag that is a bit rougher and has no polished surface texture similar to cloth. This kind of bag is made of conventional non-woven fabric in terminology.
The other is a bag with a polished surface that seems to be coated with a layer of oil. This kind of bag is called a film-coated non-woven bag, and at the same time, it is also a waterproof non-woven bag that people call. And its processing process is not to coat a layer of oil on it, but in the process of processing, a layer of PP film is covered on the conventional cloth, and its name comes from, that’s why it is called Waterproof non-woven bag.
Then, how to make waterproof non-woven bags? The editor first tells you how to produce coated non-woven fabrics. The film-coated non-woven fabrics are produced on the production, that is, the traditional gravure printing process is used to print the pictures and texts on the film, and then the film with the pattern is laminated on the non-woven fabric by the film coating process. This method requires an intermediate medium, that is, first print the graphics on the thermal transfer film or thermal transfer paper, and then transfer the pattern to the non-woven fabric by heating the transfer device. The commonly used medium in printing printing is thermal transfer film.
After the film-coated non-woven fabric is produced, the roll of film-coated non-woven fabric is put into the automatic non-woven bag machine. After the material enters, the complete film-coated non-woven bag comes out.