Due to its economy, water resistance, and portability, express packaging bags have increasingly become the preferred packaging products for transportation, especially in the field of e-commerce transportation. So how to distinguish the quality of an express bag?
The material of the express bag is low-density polyethylene (LDPE), which is commonly referred to as high-pressure PE. It has the characteristics of non-toxic, odorless, odorless, excellent low temperature resistance and flexibility; high-density polyethylene (HDPE) is also Generally speaking, PO is also called low-pressure PE. It is also non-toxic, odorless, odorless, abrasion-resistant, impermeable, but has poor softness and strong rigidity.
The bags in the market are divided into new materials and recycled materials. Brand-new bags such as SF Express bags, and general-purpose bags of general express companies are made of recycled materials.
Judging the quality of a bag according to the characteristics of the material is simply to smell it, touch it
Smell the heavier the smell, indicating that the material is worse, and other plastics are added. Some businesses deliberately add flavors in order to cover up the odor, so bags with heavy smells are harmful to the body regardless of the smell or fragrance.
Two touches The better the surface gloss of the bag, the purer the raw material and the higher the quality
Three pulls are toughness. Some bags break in a straight line like a piece of paper. The bag is also bad. Fortunately, the bag will still be connected even if the outer layer is torn during the tearing process.