Zipper bag manufacturer introduces selection of PE for hot sealing layer of boiled bag
The differences between boiling bag PE and ordinary PE are as follows: ① better heat sealing strength; ② good heat sealing property of zipper bag; ③ good thermal viscosity strength (not breaking the bag when boiling); ④ good thickness uniformity → stable heat sealing quality; ⑤ good transparency, no obvious water ripple; ⑥ no fisheye, impurity, crystal point → appearance bubble, even piercing PA film The barrier property decreased or oil leakage occurred. The quality characteristics of the first three points are mainly determined by the pellet formula of each layer of PE film during blow molding.
Expanding knowledge: vinyl chloride film (PVC)
PVC film has color and colorless, zipper bag surface gloss is good, ink adhesion is better than PE and PP film, corona treatment is not needed before printing, but when printing with water-based ink, corona treatment is still needed. According to the amount of plasticizer, it can be divided into soft, semi soft and hard films. PVC film adopts surface printing or inner printing process, using vinyl chloride vinyl acetate copolymer ink or polypropylene ink. It generally uses high-frequency heat sealing, if the heat and part of the conductor, in high-frequency heat sealing will dry out, so pay attention to the insulation of ink, especially black ink and gold and silver ink. www.dgbpk.com/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag