Electromagnetic inductive composite aluminum foil seal gasket and manufacturing process therefor

Abstract

The invention belongs to the technical field of packaging material processing, in particular to an electromagnetic inductive composite aluminum foil sealing gasket used for sealing a packaging bottle. The product of the invention is composed of a substrate layer 1 which is made of cotton paper and an aluminum foil layer 4 and the two layers are bonded by an adhesive layer 2; a sealing membrane layer 3 is coated on the upper surface of the aluminum foil layer 4 and an adhesive sealing layer 5 is coated on the lower layer; the adhesive layer 2 is made of olefin added with colophony or terpene resin which accounts for 1 to 5 percent of the total weight of the adhesive. By adding the colophony or the terpene resin to the olefin, the temperature resistance property of the adhesive is improved and low temperature or high temperature can not cause the separation of the adhesive, thus improving the stability of the product. High voltage electric corona treatment (the voltage is not lower than 18,000V) is carried out to the surface of the aluminum foil layer by the manufacturing technique of the invention, thereby the adhesive force of a printing layer on the aluminum foil layer is increased, the quality of directly printing on the front surface of the aluminum foil is greatly improved and the printed layer is not easy to fall off.

Description

technical field [0001] The invention belongs to the technical field of packaging material processing, in particular to an electromagnetic induction composite aluminum foil sealing gasket used for sealing packaging bottles. Background technique [0002] Electromagnetic induction composite aluminum foil sealing gasket is to combine metal aluminum foil and sealing material through hot melt adhesive. Under electromagnetic induction, the aluminum foil is heated and melted to separate from the sealing material, and the sealing material is heated and pasted on the bottle mouth to achieve the purpose of sealing. Because the sealing tool is simple and effective, it is widely used in the bottle mouth sealing of bottled products such as medicine and food. [0003] At present, the hot melt adhesive used in the electromagnetic induction gasket is made of paraffin, and the liquid paraffin is easy to fall off when the temperature changes too much (for example, the temperature changes more ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an electromagnetic induction composite aluminum foil sealing gasket and its manufacturing process to overcome the deficiencies in the prior art

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