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Metallic bottle can and method for manufacturing same

A manufacturing method and technology of bottles and cans, applied in the field of metal bottles and cans and its manufacturing, can solve the problems of increased production costs, etc., and achieve the effects of small opening torque, excellent cover openability, and reduced heating frequency

Inactive Publication Date: 2019-11-15
TOYO SEIKAN KAISHA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, from the viewpoint of forming a sized coating, the production method of Patent Document 1 requires a step of applying a sized coating and a step of drying and baking
In addition, it is necessary to provide paint for coatings having dimensions, which poses a problem of increased production costs such as material costs and equipment costs

Method used

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  • Metallic bottle can and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0078] [Measurement]

[0079] (measure MEK extraction rate)

[0080] The film was removed from the inner surface of the obtained jar by using concentrated sulfuric acid. Then rinse the jar with water and allow the jar to dry. The threaded portion of the bottle and can was cut into a test piece of 30 mm×30 mm, and the test piece was weighed (A). Next, the weighed test piece was immersed in MEK (methyl ethyl ketone), and then boiled and refluxed for 1 hour. After reflow, the test piece was washed twice with virgin MEK, dried and then weighed (B). The finish varnish layer was removed from the already weighed test pieces by using concentrated sulfuric acid. Then, the test piece was washed with water, and dried and weighed (C). Based on the weighed value, the extraction rate was calculated according to the following formula.

[0081] MEK extraction rate (% calculated by mass)=100×(A-B) / (A-C)

[0082] Among them, A is the quality of the test piece before extraction,

[0083] B...

experiment example 1

[0113] A circular body was punched out from an aluminum alloy sheet JIS3104 with a thickness of 0.38 mm. The round blank is drawn and then drawn and thinned to obtain a bottomed cylinder. The opening of the bottomed cylindrical body was cut out to obtain a can body. Next, the can body is washed, dried, and printed on the side surface of the can body (except for the area that will become the mouth when the can body is formed into a bottle). In addition, a finish varnish containing a mixed resin selectively containing polyester resin, epoxy resin, and amino resin as a matrix resin was applied to the entire side surface of the can body including the region to be the mouth so that at the The film thickness will become 4 μm after the second bake. Next, a first bake was performed at 230° C. for 80 seconds in a bulk furnace. Thereafter, the inner surface of the can body was sprayed with the paint for forming the inner surface, and a second bake was performed on the inner surface o...

experiment example 2

[0115] Filled jars were prepared in the same manner as in Experimental Example 1, but with a first bake at 230°C for 105 seconds and a second bake at 205°C for 95 seconds. Measurements and evaluations were carried out on the filled bottles to obtain the results shown in Table 1.

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Abstract

A metallic bottle can according to the present invention is characterized by comprising a bottle-shaped metallic base substrate having a mouth part with a screw part, a shoulder part, a barrel part, and a bottom part, a finishing varnish layer being directly provided on the metallic base substrate at an outer surface of the mouth part, a MEK extraction ratio of the finishing varnish layer being 2to 8 mass%.

Description

technical field [0001] The present invention relates to a metal bottle and can and its manufacturing method. The metal bottle and can have a finishing varnish layer directly arranged on the outer surface of the substrate at the mouth thereof. Background technique [0002] Metal bottles and cans (hereinafter generally simply referred to as bottles and cans) have been widely used as containers for containing alcoholic beverages such as beer and for containing soft drinks such as coffee. [0003] Typically, jars are produced according to the procedure described below. The aluminum sheet is formed into a cylindrical can body with a bottom by drawing and thinning (DI processing). In sequence, the can body is subjected to the step of applying a coating having dimensions to improve adhesion to the ink or to the finish varnish layer, followed by baking, and the steps of printing and applying the finish varnish, followed by baking , and a step of forming an inner surface coating, f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D23/08B05D3/00B05D3/02B05D3/12B05D7/14B05D7/22B05D7/24B65D23/02C09D163/00
CPCB65D23/0828B05D3/00B05D3/0209B05D3/12B05D7/14B05D7/227B05D7/24B65D23/02C09D163/00B65D1/0207B05D2202/25B05D2202/00B05D2254/02B05D2701/00B05D3/0254B21D51/2638B65D23/0807B65D7/42B65D3/12B65D7/14B65D23/0814B05D3/02B05D7/22B05D2504/00B05D2259/00B05D2508/00B05D7/02
Inventor 清水勇作汤川泰洋山田幸司
Owner TOYO SEIKAN KAISHA LTD
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