What is the reason for the low heat sealing strength of foil aluminum bags material
Release time:
2022-06-14
In the application of packaging bags, foil aluminum bags material is widely used. However, in the production process of foil aluminum bags material, the problem of low heat sealing strength of foil aluminum bags material may occur. Here is a brief introduction to the reasons for the low heat sealing strength of foil aluminum bags material
In the application of packaging bags, foil aluminum bags material is widely used. However, in the production process of foil aluminum bags material, the problem of low heat sealing strength of foil aluminum bags material may occur. Here is a brief introduction to the reasons for the low heat sealing strength of foil aluminum bags material:
1. The influence of the cooling process on the heat sealing strength: the cooling process of foil aluminum bags material is inkjet printing under a certain pressure, and the welding seam after melting and heat sealing is carried out at a lower temperature. Insufficient heat sealing pressure, poor cooling water circulation, insufficient water circulation, too high water temperature or untimely cooling will cause poor cooling, reduce heat sealing strength, and affect the appearance of the weld.
2. Influence of interlayer peeling on heat sealing strength: For composite films of the same structure and thickness, the higher the degree of interlayer peeling of the composite film, the higher the government policy and supervision, the greater the heat sealing strength of foil aluminum bags material. For products with low peel strength, the interlayer peeling of the composite film often occurs at the welding seam, resulting in a greatly reduced heat sealing strength of the welding seam. This is because the inner heat sealing layer independently bears the tensile force of the damage, and the surface material loses compensation. The printing effect is strong, the interlayer peeling strength of the composite film is high, and there is no interlayer peeling at the welding seam. The actual heat seal strength is much greater.
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