Laminated metal plate as well as production method and production device thereof

Abstract

The invention discloses a laminated metal plate as well as a production method and a production device thereof. The laminated metal plate comprises a metal plate and a polyester film laminated on the surface of the metal plate, wherein an adhesive is not arranged between the metal plate and the polyester film. The laminated metal plate production method comprises the following steps: heating the metal plate to realize that the temperature of the metal plate is higher than the melting point of the polyester film; applying mechanical pressure to the polyester film by virtue of a lamination device so as to cover the polyester film on the metal plate; enabling one side, close to the metal plate, of the polyester film to be molten and the other side, far from the metal plate, of the polyester film to be not molten; and rapidly cooling the metal plate laminated by the polyester film to obtain the laminated metal plate. The laminated metal plate can be used for overcoming a plurality of defects of the prior art, and realizing no adhesive, safety, environmental friendliness, strong adhesion and strong corrosion resistance, and can be directly used in food package; the production process is simple ad practical; and the production device meets the requirement of industrial production.

Description

technical field [0001] The invention relates to material technology, in particular to a film-coated metal plate, a production method and a production device thereof. Background technique [0002] With the development of technology, changes in consumption concepts and fashion, the competition among metal, plastic, paper and glass in packaging materials is becoming increasingly fierce, and metal packaging materials are characterized by good airtightness, hard texture, good elasticity and good light resistance. It has always occupied an important position in the packaging field due to its characteristics of good gas barrier properties and good gas barrier properties. [0003] As an important part of metal packaging materials, tinplate plays an important role in the fields of food, beverage, aerosol cans and chemical cans. However, since tin is a major strategic resource, its price is relatively expensive, and the resource is increasingly exhausted. As a product that can replac...

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Problems solved by technology

[0006] 1. The low-temperature bonding process is to combine the metal plate and the polyester film together with an adhesive. During the compounding process, when the adhesive is dried, the solvent will volatilize. This process is not environmentally friendly and unstable, and the production The finished coated metal sheet products cannot be directly in contact with food, and such coated metal sheet products are only used in non-food can industries such as chemical industry;

[0007] 2. The metal plate and the polyester film in the traditional film-coated metal plate have weak lamination and low adhesion, resulting in poor impact resistance and corrosion resistance;

[0008] 3. The traditional production method of film-coated metal sheets is greatly affected by ambient temperature and humidity, the process is unstable, and the product stability is poor;

[0009] 4. The low-temperature bonding process has relatively low production efficiency and high cost

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