Now on the market non-woven bags and bags, the quality is good, the price is not high, but basically have the role of waterproof. So, how are these bags waterproof?

Maybe many people know that non-woven fabric is a kind of breathable material, which is easy to decompose in the natural environment. Usually, non-woven bag factories directly use this kind of fabric to make products. The general printing process includes silk screen printing or offset printing. These two printing processes have no special changes to non-woven fabric. For ink printing, the printed pattern is washed out after the bag is washed.

Non woven bag lamination is a production process different from screen printing. Its characteristics are that the printed pattern can achieve photo level effect, and complex color patterns can be printed. It is covered with a layer of PP film on the surface of non-woven fabric, so that the firmness of non-woven fabric has been greatly improved. At the same time, non-woven fabric can also play the role of waterproof, The printed pattern on the surface will not fade due to washing.

Therefore, the actual effect is this layer of film. The reason why the patterns of the non-woven bags we usually use are not faded, but also waterproof is largely due to its role in this process.