The non-woven bags and bags on the market are of good quality and low price, but they are basically waterproof. So, how do these bag-like waterproof effects do?
Many people may know that non-woven fabric is a kind of breathable material, which is easier to decompose in natural environment. Usually non-woven bag factories directly use this kind of fabric to make products. The general printing process includes silk printing or offset printing. The printing process has no special changes to non-woven fabrics. For ink printing, the printed pattern is washed away after the bag is washed with water.
Non-woven bag lamination is a production process that is different from screen printing. Its characteristic is that the printed pattern can achieve photo-level effects and can print complex color patterns. It is covered with a layer on the surface of the non-woven fabric. PP film, such non-woven fabric has also been greatly improved in terms of firmness. At the same time, the non-woven fabric can also have the characteristics of waterproofing, and the printed pattern on its surface will not fade due to washing.
Therefore, it is this layer of film that actually plays a role. The non-woven bags we usually use are not fading in color and waterproof, to a large extent rely on its role in this.