To test the quality of non-woven bags? It's that simple

1. Sensory inspection 　　 (1) Color 　　 Visually inspect the color of the non-woven bag under natural light. (2) Odor 　　 Identify the smell of non-woven bags by smell. 2. Appearance quality inspection of non-woven bags 　　 Check visually under natural light and use visual hand feel method to check. 3. Material requirements inspection 　　 check the non-woven bag material qualification certificate. 4. Dimensional deviation inspection 　　 measure the non-woven bag with a measuring tool with a division value of 1mm. 5. Non-woven bag sewing requirements inspection 　　 (1) Sewing appearance 　　 Spread the non-woven bag flat on the inspection table, measure it with a ruler and inspect it visually.　　(2) Stitch density 　　 Use a ruler to measure the length of each 3cm part and count the number of stitches.　(3) Seam strength of non-woven bags 　　 According to the provisions of GB/T 3923.1-1997. Take a sample on a non-woven bag with a length of 300mm and a width of 50mm. Sewing the sample at both ends of the suture should retain 4 stitches of suture length and tie the ends to prevent the suture from falling off. 6. Physical and mechanical performance inspection 　　 (1) Breaking strength 　　 shall be carried out in accordance with the provisions of GB/T 3923.1-1997. Sampling on a non-woven bag, the sample is 300mm long and 50mm wide. 　　 (2) Non-woven bag lifting test machine uses a bag fatigue tester, amplitude 30mm±2mm, frequency 2Hz~3Hz. 　　 drop test will be equivalent Table 3 Nominal load-bearing simulants (such as sand, rice grains, etc.) are placed in a non-woven bag, and then hung on the testing machine for 3600 tests to observe whether the non-woven bag body and the carrying strap are damaged. The number of trials is three.