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How to measure the gram weight of non-woven bags
How to measure the gram weight of non-woven bags, this is a place where many friends who are new to non-woven bags are prone to misunderstandings. Today I will tell you how to measure the weight of a non-woven bag. Then, I will use Watsons' film-coated tote bag as a measurement case, hoping to help friends in need.
First of all, we have a non-woven bag in our hand and want to know the thickness and weight of its fabric, we have to find a professional tool to measure it. And here is not a caliper or ruler to measure. Not really thick. Instead, a non-woven bag is dug up regularly with professional tools, and then weighed with an accuracy of 0.01 grams. Then, the obtained weight is the thickness of the fabric used in the bag. That is, how many grams of fabric we often use to make non-woven bags.
Of course, there is another aspect that needs to be paid attention to. If it is a non-woven bag covered with a film, it is necessary to distinguish the gram weight of three materials. The first is the raw material non-woven fabric, and the second is the Glue, the third is PP film. Generally, the thickness of all non-woven glue and PP film will not change. A bag always maintains the appearance of 20g of glue and 15g of PP film. The real control of the thickness of the fabric is still controlled by non-woven fabrics.
Speaking of this, it is necessary to mention the thickest and thinnest specifications of the laminated non-woven fabric. Generally, the thickness of non-woven fabrics usually used is 90g--120g, which is the most commonly used. If it is less than 90g, then the thickness of the glue and PP film is removed, and the thickness of the non-woven fabric is only 55g. If the film is coated on such a thick non-woven fabric, it will make the coated non-woven fabric look like plastic. In the same way, the texture of the non-woven fabric will be lost.
For fabrics larger than 120g, it should be noted that the fabric can be made without affecting the texture of the entire product. However, as we all know, the non-woven bags are now made by a machine, and they are all made by ultrasonic high temperature to complete the thermocompression bonding. Therefore, once the fabric is thick, the equipment cannot be completed. Fusion of the bag interface.
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