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Hotmelt composition for metal can and metal can utilizing the same

A metal can and composition technology, applied in the direction of covering/exterior paint, container, rigid container, etc., can solve the problems of poor sealing, easy peeling of curable coating film, etc., to achieve excellent sealing, excellent heat resistance, excellent The effect of sealing performance

Inactive Publication Date: 2009-09-09
TOYO SEIKAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] From the above point of view, a curable coating film is formed at the portion where the curled portion contacts the outer surface of the mouth and neck, preventing water from penetrating into the curled portion, and preventing water from adhering to the edge of the steel sheet existing inside the curled portion. However, due to When the curled portion deforms due to load or thermal expansion when fastening the cap, a large shear force acts on the adhesive surface of the coating film, and there is a problem that the curable coating film is easy to peel off and sealing failure is likely to occur

Method used

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  • Hotmelt composition for metal can and metal can utilizing the same
  • Hotmelt composition for metal can and metal can utilizing the same
  • Hotmelt composition for metal can and metal can utilizing the same

Examples

Experimental program
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Embodiment

[0079] The present invention will be specifically shown below.

[0080] (Method for producing hot-melt composition for metal cans)

[0081] The tackifiers shown in Tables 1 and 2 and mineral oil were added to a stainless steel beaker equipped with a stirrer and heated. Heating is carried out carefully so that the contents do not reach above 180°C. After melting, stirring is performed until homogeneous. Then, slowly add the thermoplastic elastomer. Finally, wax and polyolefin resin were added to prepare a hot-melt composition for metal cans.

[0082] (Evaluation method of hot-melt composition for metal cans)

[0083] (1) softening point

[0084] The softening point is measured by a ring and ball softening point test method in accordance with "Japanese Industrial Standards" JIS (Japanese Industrial Standard) K 6863-1944.

[0085] (2) Determination of viscosity at 190°C

[0086] The measuring method of the viscosity at 190° C. was performed in accordance with JIS K 6862 (A...

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Abstract

The invention provides a hot-melt composition comprising a thermoplastic elastomer, a tackifier, a wax and a polyolefin resin, the wax having a softening point (R & B system) of 140 to 160 DEG C. The hot-melt composition can be easily applied to the mouth-neck portion of a metal can and can be excellently produced. Even when placed under a high-temperature condition, the sealing material that is formed exhibits excellent heat resistance maintaining the sealing.

Description

technical field [0001] The present invention relates to hot melt compositions for metal cans. More specifically, the present invention relates to a hot-melt composition having excellent heat resistance, which can be advantageously used to protect metal rims when metal cans are formed, and metal cans made using the same. Background technique [0002] In recent years, as metal cans, metal cans having a resealing function are widely used, in which a threaded portion capable of being fastened to a cap is formed on the mouth and neck portion. In such a metal can having a resealing function, the opening edge of the neck portion forms a curled portion that is rolled back outward. [0003] In a metal can having such a shape, the metal plate constituting the resin-coated metal plate of the metal can is exposed at the opening edge, and therefore, when the metal plate is a steel plate, there is a possibility of rust due to adhesion of moisture, especially Since there is a space insid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00C08L23/00C08L53/02C08L91/06C08L93/04B65D1/40B65D8/02B65D25/34
CPCC08L57/02C09J153/025C09J123/16B65D1/165C08L53/02C09J153/02C08L53/025C08L91/06C08K5/01C09J123/02C08L23/02C08L23/10C08L2666/02C08L2666/04C08L2666/06C08L2666/08C08L2666/24C08L21/00B65D1/40
Inventor 石田胜彦马野节夫内田研策石黑秀之鹤卷忍
Owner TOYO SEIKAN KAISHA LTD
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