A bonding process of polyurethane and metal

Abstract

The invention relates to a polyurethane and metal binding technology, which comprises the following steps: (1) surface metal treatment, namely performing sand blasting and cleaning on a metal surface; (2) preparation of a binder, namely mixing Chemlok adhesive with toluene solvent; (3) spraying of the binder, namely preheating the cleaned metal, and evenly spraying the prepared binder on the metal surface; and (4) pouring of polyurethane, namely putting the metal below a polyurethane pouring machine, so as to enable a polyurethane prepolymer to slowly flow to the metal surface along with a slope pouring gate on the metal. The product manufactured by adopting the polyurethane and metal binding technology has the advantages that binding power is high, binding marks can not be seen from the view of appearance, and the like; under the condition of preheating the metal, the Chemlok adhesive is changed into a viscous state from a dry membrane state, thus being beneficial to binding of the Chemlok adhesive and the polyurethane as well as the metal surface, and avoiding dry membrane crack in preheating of the metal.

Description

technical field [0001] The invention belongs to the field of chemical industry, in particular to a bonding process of polyurethane and metal. Background technique [0002] Polyurethane bonded to the metal generally adopts a well-formed polyurethane sheet that is cut to size and bonded to the metal with glue. [0003] The disadvantage of this bonding method is that the bonding force is not strong, and the adhesive layer is obvious, resulting in poor bonding performance and unattractive appearance. [0004] The Chinese patent whose publication number is 101418598 belongs to the technical scheme of bonding polyurethane on the above-mentioned metal. This patent discloses a hollow plastic polyurethane metal composite board, which includes a polyurethane layer. It is characterized in that a skeleton layer is set on the polyurethane layer, and then A cavity layer is set on the skeleton layer, and a metal plate layer is finally established on the cavity layer; the skeleton layer, c...

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Problems solved by technology

[0003] The disadvantage of this bonding method is: the bonding force is not strong, and the adhesive layer is obvious, resulting in poor bonding performance and unsightly appearance.

[0004] The Chinese patent whose publication number is 101418598 belongs to the technical scheme of bonding polyurethane on the above-mentioned metal. This patent discloses a hollow plastic polyurethane metal composite board, which includes a polyurethane layer. It is characterized in that a skeleton layer is set on the polyurethane layer, and then A cavity layer is set on the skeleton layer, and a metal plate layer is finally established on the cavity layer; the skeleton layer, the cavity layer and the metal plate layer can be arranged under the polyurethane layer; the skeleton layer, the cavity layer and the metal plate layer can also be It can be symmetrically arranged on the upper and lower sides of the polyurethane layer to form a double-cavity plastic polyurethane metal composite board; although it has the advantages of reducing environmental pollution, good thermal insulation performance of the material, good sound insulation effect, and simple construction process, its adhesion is still not obtained. improve

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