Can provided with easily openable closure and process for production thereof
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United States of America Patent
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May 9, 1989
Grant Date -
N/A
app pub date -
Feb 24, 1988
filing date -
Jun 24, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to a can for canning equipped with an easily openable closure having an inside resin film layer with excellent corrosion resistance and hot water resistance. The easily openable closure consists of an aluminum substrate having a score formed so as to reach halfway in the thickness direction of the aluminum substrate, an inside surface material of a crystalline thermoplastic resin film having a tensile strength of 3 to 25 kg/mm.sup.2 provided on that surface of the aluminum substrate which faces the inside surface of the can, a layer of an adhesive and/or an adhesion promoting agent interposed between the substrate and the inside surface material and bonding the substrate and the inside surface material with an adhesion strength of at least 3 kg/15 mm width, and a layer of an epoxy-type thermosetting resin film containing a lubricant applied to the surface of the inside surface material. The closure of the invention has excellent scratch resistance during the can-making process so that occurrence of scratches in the film is prevented and the completeness of coating is retained. The closure also has hot water resistance to retorting and excellent corrosion resistance and pitting corrosion resistance.
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