Non-absorbing aroma and sour packaging materials

The inner layer of beverage packaging paper generally uses heat-sealing polyethylene (PE) and polyethylene terephthalate (PET), but polyethylene can easily absorb the flavor of juice. Although polyethylene terephthalate can be very The fragrance of the juice is well preserved, but due to its crystallinity, the heating becomes brittle and the heat sealability is poor.
The filler laminate-FF sealing film developed by Dainippon Printing Co., Ltd. is made of a denatured polyester. It has a non-sorptive property such as polyethylene terephthalate, and it has 120-130° C. like polyethylene. Heat sealability.
The main components of polyethylene terephthalate are ethylene glycol and terephthalic acid. For the preparation of FF-seal film, as long as the ratio of the two components is changed, then the third component is added to agglomerate to make it non-condensing. Crystallization, FF-seal film is made of this modified polyethylene terephthalate as the main raw material, molecular weight 50000-100000.
The FF-seal film maintains twice the retention rate of alpha pinene in orange juice, which is used to package mineral water without the odor of polyethylene.
The strength of the FF-seal film is equal to that of polyethylene, the gas barrier is 300 cc/m 2 ·24 hours, and the polyethylene is 1500 cc/m 2 ·24 hours, which is much better than polyethylene. (Wang Min)