The reason for this is that the adhesive strength of polyurethane adhesives is very large and often exceeds the adhesion of aluminum plating on the PET surface.
On the other hand, in China's vacuum aluminized film, there is no top coat protective layer on the aluminized layer, so it is recommended to engage in vacuum aluminum plating manufacturers, in addition to the primer on the aluminized substrate film, after the use of aluminum plating The two-component polyurethane rubber is coated with a top coat to protect the aluminum plating from being rubbed off by the friction and adhesive bond.
Because of the small mass of polyurethane glue, the small cohesive force, and the great activity of the glue, it is easy to infiltrate into the aluminized layer (only 400-600 thickness) to form a firm one with the aluminum plating, while the ethyl acetate in the PU glue is in PET. The adhesion between the surface and the aluminum plating results in the presence of PET on the aluminum-plated surface, which in turn weakens the adhesion between the PET surface and the aluminum plating, resulting in separation of the PET from the aluminum plating.
Solution: Apply the two-component PU glue on the surface of another substrate that is compounded with it to reduce the amount of ethyl acetate penetrating into the inner layer of the aluminum plating and prevent it from falling off. During operation, attention should be paid to adjusting the tension to a lesser extent so as to prevent the vacuum aluminum plating substrate film from being elastically deformed under a large tension, thereby affecting the adhesion of the aluminum plating. When dry recovery, the temperature is appropriately increased and ethyl acetate is used.
When dispensing gum, add some ethyl acetate appropriately. Appropriately increase the heating temperature, accelerate the cross-link curing reaction rate of PU glue, and reduce or prevent the penetration of the glue on the vacuum aluminum plating layer.
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Eco Bag and Green Bag are more economic effects
Began to release from the plastic limit, Plastic Bags will begin to gradually withdraw goods packaging market, replaced by a Eco Bag can be used repeatedly. Easier compared to a plastic bag in terms of the Eco Bag printed pattern, color expression more vivid. Plus you can use repeatedly, can be considered more attractive than plastic bags, Eco Bag with pattern and advertising, because the attrition rate is lower than can be used repeatedly plastic bags, woven shopping bags but more cost savings, and bring more obvious advertising effectiveness.
Traditional plastic bags, shopping bags, in order to save costs, so the material is thin, easily damaged. However, in order to make him more firmly bound to be all the more it costs. Solve all the problems to the emergence of Eco Bag, Green Bag, toughness, easy to wear. There are a lot of coated Eco Bag, with firmness outside more waterproof, feel good, beautiful shape a bit. Single cost compared to the plastic bag up a point, but the life of a Eco Bag can be arrived hundreds, even thousand of tens of thousands of plastic bags.
Eco Bag and Green Bag are more advertising effect
A beautiful Eco Bag, not only just a merchandise bags. Its beautiful appearance and attractive fashion simple shoulder bag can transform himself into a street a beautiful landscape. Coupled with its solid, waterproof, not sticky characteristics will become the first choice of the customer to go out in such a Eco Shopping Bags can be printed on your company logo or advertising, the advertising effect on self-evident, and the real small investment into a big return.
Plastic limit order is issued, in order to solve environmental problems. Eco Bag capsized, greatly reducing the waste into pressure. Coupled with the concept of environmental protection, but also to reflect the image of your business and the effect of the PFP. Thus bring the potential value of more than money can replace.
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Eco Bag
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