Kraft paper bags, also known as paper-plastic composite bags, are visually appealing and highly durable, adding a touch of elegance to the packaging. However, any packaging bag, no matter how attractive, is unacceptable if it tears. Here's a discussion on the appropriate stitch spacing for kraft paper bags. Experts say this issue is crucial to the quality of the bags and should be strictly controlled. It is understood that when the stitch spacing of the paper-plastic composite bag is less than 6mm, the seam strength is easily ensured, but the amount of thread used increases significantly, raising costs. If the stitch spacing is too small, the damage to the扁丝 will inevitably increase, and the seam strength will decrease as the spacing decreases. When the stitch spacing is between 6-8mm, the thread count is moderate, and there is no thread shedding during testing. Additionally, when the sample is stretched and torn, both the thread and the丝 break simultaneously, meeting the required seam strength standards. Moreover, when the stitch spacing is greater than 10mm, due to the large spacing, some扁丝 may pull out from the gaps during stretching without breaking the thread, making it difficult to meet the standard seam strength requirements.