Packaging roll film manufacturers tell you what the sawtooth of food bag has
Many food bags have serrations, which means it is convenient for consumers to tear the bags. We often hold a corner of the food bag, along the serration, it is easy to tear the food bag. In the face of this phenomenon, a lot of food are not satisfied. I don't know if you've ever thought about why it's so easy to tear a food bag with serrations?
In fact, this problem is designed to the application of mechanics. Packaging film manufacturers tell us that when an object is stressed, the stress situation will change according to the shape of the object itself. Generally, sudden changes will occur at the wrinkle or sharp corner. If a sharp angle is provided in advance, it is a "weakness".
The "weakness" of food bags is the sawtooth that manufacturers make for food bags. Food packaging is the most common type of plastic products, plastic products have a characteristic, that is, in the absence of a notch tear, because of its characteristics will not easily along a certain direction of separation. The setting of the saw tooth is to find this breakthrough, simply reserve a saw tooth or cut mark, a little force can destroy its structure and tear it easily.
What is the principle of packaging film? In fact, the polymer chain structure of plastics has a characteristic, that is, it can withstand a large tensile force in the chain direction, and will not break, but it is easy to pull apart in the direction perpendicular to the chain. This is like sticking several sewing threads side by side. If you pull along the thread, it will be more difficult to break it when you pull it in the direction of the vertical line. http://www.dgbpk.com/
Dongguan Beite packaging materials Co., Ltd
Aluminum foil packaging bags, mask bags, self-supporting zipper bags, eight side sealing bags, red wine bags, dog food bags, beverage bags, bags in boxes, wrapped films, perforated fruit bags.