Courier bags and courier bags can be roughly divided into: express plastic bags (plastic courier bags), express paper bags (paper express paper bags), express bubble bags (composite bubble bags), express bone bags, etc.
First, express plastic bags (plastic courier bags) Material: Polyethylene (PE) can be divided into low density polyethylene (LDPE), high density polyethylene (HDPE), with low cost, light weight and other strengths, LDPE and HDPE express adhesive Differences in bags: LDPE transparency, softness contrast, printing color contrast light; HDPE has excellent mechanical properties; in China, express bags use LDPE as the main data, while foreign countries usually use LDPE, HDPE composite As the main information of the courier bag.
Second, the express file bag (paper express file bag) material: usually gray paper white paper, white cardboard, cattle cardboard mostly. Express delivery usually uses paper from 200g/m2 to 450g/m2, and the courier file bag has a flat and erect character.
Third, the express bubble bag (composite bubble bag) material: a clear soft bag filled with air from the middle layer of the air cushion film, mainly used for the packaging of small-volume, fragile and easily damaged goods. The courier bubble bag has a shock absorbing bubble film and a lot of small bubbles in the bubble film, so it is light in weight, elastic, and has excellent shock absorption, impact resistance, and non-toxic, odorless, moisture-proof, corrosion-resistant and other advantages.
Fourth, express bone bag material: bone bag (also known as compact bag, from bag, sealed bag, zipper bag, ziplock bag), with polyethylene (LDPE) and high-pressure linear polyethylene (LLDPE) through blown film molding, An eager mechanism bag made of a plastic bag that can be repeatedly sealed. The bone bag can be used for the surface packaging of various small items. The self-sealing bags produced from food-grade materials can store a variety of small foods, teas, seafood, etc., moisture, water, insects, and to avoid scattering.
