Princípios de design de sacolas plásticas

Sacos plásticos podem ser vistos em todos os lugares da vida cotidiana . Existem na verdade muitos princípios sutis por trás de seu design aparentemente simples .

First of all, in terms of material selection, plastic bags are mostly made of high molecular polymers such as polyethylene. Polyethylene has good flexibility and ductility, which allows plastic bags to be made into various shapes and sizes without breaking easily. At the same time, it also has a certain chemical stability, is not easy to react with common substances, and can adapt well to different use environments, such as being capaz de segurar vários itens com diferentes valores de pH .

In terms of structural design, plastic bags are generally double-piece structures, and the bag mouth is sealed by a heat sealing process. On the one hand, this structural design facilitates the loading and unloading of items, and on the other hand, heat sealing ensures the sealing of the bag. Good sealing can prevent leakage of items in the bag, keep the items in the bag dry and clean, and prevent moisture, poeira, etc . de entrar na bolsa do lado de fora, prolongando o prazo de validade dos itens .

From a mechanical point of view, plastic bags are designed with load-bearing capacity in mind. Its bag wall has a certain thickness, and the appropriate strength is achieved by reasonably distributing the amount of plastic material in the bag body. When filled with items, all parts of the bag can be evenly stressed to avoid rupture due to excessive local stress.

In addition, plastic bags also focus on portability design. Many plastic bags are designed with handles, and the shape and connection method of the handles are carefully considered. For example, the handles are usually wider, which is done to increase the mechanical action area and reduce the force per unit area, making it easier and more comfortable for people to lift, and convenient for people to use plastic bags in shopping, transportation and other cenários .