Metal Bottles and Cans and Their Manufacturing Methods

CN114013795BActive Publication Date: 2026-03-13TOYO SEIKAN KAISHA LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2018-03-22
Publication Date
2026-03-13

AI Technical Summary

Technical Problem

In the existing technology for manufacturing metal bottles and cans, the topcoat varnish layer is prone to cracking or peeling off on the outer surface of the bottle mouth, and the production cost is relatively high.

Method used

A topcoat varnish layer is directly applied to the outer surface of the mouth of a metal bottle or can, and the MEK extraction rate is controlled between 2% and 8%. The topcoat varnish layer and the inner surface film are formed by two baking processes, avoiding additional coating and drying steps.

Benefits of technology

It effectively inhibits cracking or peeling of the topcoat varnish layer, ensures good cap openability, and reduces production costs.

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Abstract

The metal bottle / can according to the present invention is characterized by comprising a bottle-shaped metal substrate having a mouth, a shoulder, a body and a bottom, the mouth having a threaded portion, and a topcoat varnish layer directly disposed on the outer surface of the mouth on the metal substrate, the MEK extraction rate of the topcoat varnish layer being 2% to 8% by mass.
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Citation Information

Patent Citations

  • Method for manufacturing bottle can and bottle can manufactured thereby

    JP2006007154A

  • Easily openable lid

    JP1997012028A

  • Top coating composition for exterior coating of draw-formed can and outside-covered, bottomed cylindrical metal

    JP2006137846A