When making Non-woven Shopping Bag custom-made bags, many customers do not know how to use a standard to measure the weight of a non-woven bag. They often measure the weight of a non-woven bag according to their own understanding. For example, when we talk about the gram weight of non-woven fabrics, many people think that this gram weight is the weight of a non-woven bag. In fact, this gram weight refers to how many grams of fabric a square of non-woven bag weighs, not how heavy a non-woven bag weighs as understood by customers.

First, let's talk about the non-woven bags sewn by hand. Let's take the non-woven bags of regular size (30cm wide * 40cm high * 10cm side) as an example. The 80g non-woven bag weighs about 40g, and the 90g non-woven bag weighs about 45g. These are the weights before printing. If there is printing, the weight will increase a little, because the ink also has weight. The ultrasonic process is different. The 80g non-woven bag is about 35g, and the 90g non-woven bag is about 39g, which is lighter than the usual manual sewing.

There is also a kind of coated non-woven bag. The materials added to the coated non-woven bag are Opp film, printing ink, and coated plastic. When the coating was first started a few years ago, the total of these three was about 30g under normal circumstances. In recent years, the coating technology has been improved to reduce costs. Under normal circumstances, it will increase by about 25g. If the current laminated non-woven bag does not increase by about 25g after lamination, it is necessary to consider whether the non-woven bag has quality problems. Now about 25g should have reached the limit under the premise of being qualified. If it does not reach 25g, please check whether there is a quality problem. Usually, the firmness of the coating is very poor if it is less than 25g. The film and non-woven fabric will separate when you use your fingers to mix it. This is because there are few particles during lamination and the non-woven fabric and Opp are not fully compounded together. After knowing the added weight of the coating, you can also calculate the original weight of the fabric. If you use a special weighing instrument to weigh the square weight after coating, and then subtract 25 grams, you can get the actual weight of the fabric used by the non-woven bag manufacturer, and you will know whether the non-woven bag manufacturer has cut corners.