How does the non-woven bag manufacturer achieve the waterproof function of the non-woven bag

Generally speaking, when the nonwoven bag is produced, the printing process has silk printing or offset printing, which has no special change to the nonwoven fabric. For eco-friendly ink printing, the pattern printed after washing the environmental protection bag will be washed out. The non-woven film covering is a production process different from that of screen printing. It is characterized by that the printed pattern can achieve the photo level effect, can print various complex color patterns, and it is covered with a layer of PP film on the surface of the non-woven fabric. In this way, the non-woven fabric has also been greatly improved in its firmness, and the non-woven fabric can also play a waterproof feature, The printed pattern on its surface will not fade due to water washing. So, what actually works is this layer of coating. The reason why the environmental protection bags we usually use will not fade and can be waterproof. To a large extent, it plays a real role in this.