Due to the fierce competition in the non-woven bag market, the grammage reported by each manufacturer of the same fabric is different. Many customers are confused about how many grams the sample is, and they will think that the number of grams is the weight of the bag. That is not the same. The grammage reported by the manufacturer refers to the number of grams per square meter of the bag, not the number of grams that the customer understands. The following is an example for you to explain.

　　 Manually sewn non-woven bags are of normal size, 80 grams of non-woven fabrics weigh about 40 grams, and 90 grams of non-woven fabrics weigh about 45 grams. This is the weight before printing. If there is printing, the weight will increase a little, because the ink also has weight. The ultrasonic process is different. The 80-gram non-woven bag is about 35 grams, and the 90-gram non-woven bag is about 39 grams, which is lighter than the usual manual sewing. Let's talk about the size for everyone, you can understand.

　　The size of our non-woven bag is 45cm wide * 38cm wide, and the total weight is about 48 grams. We need to know the thickness of non-woven fabrics. Generally, the thickness of the fabric is determined by how many grams per square. For example, 70 grams, 80 grams, and 90 grams all refer to the weight per square meter. As long as we know the total weight of a bag, we have to think that if the weight of all areas of a bag is added up, then we have to split the fabric first.

　　 First of all, let’s look at the visual width of the handle. Normally it is 2.5cm wide, while the actual width of the fabric of the handle is generally 6.2cm. Then the length should also be measured,

 Let’s first calculate by the length of 50cm, the area of the handle is 6.2*50*2 (root)=0.062 square meters, and then look at the bag body, look at this specification, there should be no side. (If there is a side, then you need to measure the side specifications) It also depends on how many cm the bag is folded in. Normally it is 3cm. The seam position on the left and right sides is generally 1cm. The total area of the bag body is: Height(45+3)*2(surface)*width(38+2)=0.384 square meters, that is to say, the total area of a bag is 0.446 square meters is 48 grams, so that it can be calculated that each square is about 108 grams. If there is a side, it is about 150 grams. Of course, this value is not the real grams of the non-woven bag you have on hand, because there is a hand in the middle, and a hem, deduct the bag in your hand , Basically around 120G. Because the thickness of the general non-woven fabric is expressed by weight, for example, 60 grams means that the weight of a square meter of non-woven fabric is 60 grams. The larger the number, the thicker the fabric. It depends on the weight of what you want to pack. Ah, generally 80 grams is enough. If you choose a non-woven fabric of other weight, you can divide it by yourself and multiply it.

　　 There is also a film-coated non-woven bag. Compared with the original fabric, the film-coated non-woven bag has increased materials such as opp film, printing ink, and coated plastic. In the past few years, when the film was first started, the sum of the three under normal circumstances was about 30 grams. In recent years, the film technology has improved in order to reduce costs. Under normal circumstances, it will increase about 25 grams. If the current laminated non-woven bag If there is no increase of about 25 grams after coating, it is necessary to consider whether there is a quality problem with this non-woven bag. Now about 25 grams should have reached the limit under the premise of being qualified. If it does not reach 25 grams, please check whether there is a quality problem. Usually, the film is less than 25 grams. The firmness of the film is very poor. Using your fingers to mix the film and the non-woven fabric will separate. This is due to the lack of particles during the coating. The reason why the non-woven fabric is fully compounded with the opp.

　　 We can also calculate the original grammage of the cloth after knowing the grammage added by the coating. We use a special square scale to weigh the compounded square weight, and then subtract 25 grams to get the actual weight of the fabric used by the non-woven bag manufacturer. You can know if the non-woven bag manufacturer has any Have done cutting corners.

If you don’t understand, you can ask the customer service staff in detail. The fabrics produced by the manufacturer are different from those produced by the manufacturer. These values are also different. It is recommended that 80 grams is generally used. Everyone hopes to cooperate for a long time, so the quality is You can rest assured that the foreign trade factory guarantees quality and quantity.