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Resin-coated metal plate for container and production method therefor

一种制造方法、金属板的技术，应用在化学仪器和方法、家用容器、金属层状产品等方向，达到优异取出性的效果

Active Publication Date: 2016-10-12
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few studies on the improvement of the ease of taking out the contents of the conventional resin-coated metal plate.

Method used

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  • Resin-coated metal plate for container and production method therefor
  • Resin-coated metal plate for container and production method therefor
  • Resin-coated metal plate for container and production method therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] Hereinafter, examples of the present invention will be described.

[0100] (Manufacturing method of metal plate)

[0101] A steel plate having a thickness of 0.18 mm and a width of 977 mm subjected to cold rolling, annealing, and temper rolling was degreased, pickled, and then chrome-plated to produce a chrome-plated steel sheet (TFS). Chromium plating is in the presence of CrO 3 , F - , SO 4 2- Chromium plating in a chrome bath containing CrO after intermediate rinsing 3 , F - Electrolysis in the chemical conversion treatment solution. At this time, adjust the electrolysis conditions (current density, electrical quantity, etc.), and adjust the metal chromium adhesion amount and the chromium hydroxide adhesion amount to be 120 mg / m in Cr conversion. 2 , 15mg / m 2 .

[0102] (Manufacturing method of film for resin coating on container inner surface side)

[0103] A wax compound is mixed with a polyester resin obtained by polymerizing the acid component and the d...

Embodiment 2

[0188] (Manufacturing method of metal plate)

[0189] A metal plate was produced by the same method as in Example 1.

[0190] (Manufacturing method of film for resin coating on container inner surface side)

[0191] For the acid components and glycol components shown in Table 6, all the copolymerization components other than terephthalic acid as the acid component were polymerized with ethylene glycol to obtain polyethylene terephthalate or copolymerized polyethylene terephthalate. Ethylene glycol dicarboxylate, polybutylene terephthalate, which is polymerized by terephthalic acid and butylene glycol, is further mixed to make a polyester resin. A wax compound is mixed with the polyester resin to form a resin composition, and the resin composition is dried and melted according to a conventional method. After being co-extruded through a T-die, it is cooled and solidified on a cooling drum to obtain a non-drawn The film is stretched, and then biaxially stretched and heat-set to...

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Abstract

Provided is a resin-coated metal plate that is for a container, that maintains excellent extraction properties, and that stably satisfies various characteristics. The resin-coated metal plate for a container comprises a resin layer (A) that has a multilayer structure and that comprises a polyester as a main component thereof on a side that serves as a container inner surface when forming the metal plate on a container. 1) The resin layer (A) contains 85 mol% or more of terephthalic acid. 2) The resin layer (A) is configured from at least two layers, and the uppermost resin layer (a1) that comes into contact with the container contents contains 0.10-2.0 mass% of a wax compound with respect to the uppermost resin layer (a1). 3) The maximum value of the Raman band intensity ratio (I1720 / I1615) when a cross-section of the uppermost resin layer (a1) is measured using a laser polarization plane that is parallel to the surface of the resin layer (a1) is in the range of 0.45-0.80. 4) The thickness of the uppermost resin layer (a1) is 0.5-10 mu m. 5) The thickness of the resin layer (A) excluding the thickness of the uppermost resin layer (a1) is 5-20 mum.

Description

technical field [0001] The present invention relates to a resin-coated metal sheet for a container used for, for example, a can body and a lid of a food can, and a method for manufacturing the same. Background technique [0002] Conventionally, metal sheets such as tin-free steel (TFS) and aluminum, which are raw materials for metal cans used in food cans, have been coated to improve corrosion resistance, durability, and weather resistance. However, the technique for performing this coating has problems in that not only the sintering process is complicated, but also requires a large amount of processing time, and furthermore discharges a large amount of solvent. [0003] Therefore, in order to solve these problems, a resin-coated metal sheet in which a thermoplastic resin film is laminated on a heated metal sheet has been developed instead of a coated metal sheet, and is currently widely used industrially mainly as a raw material for beverage cans. [0004] However, when th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D25/14B32B15/09B32B27/20
CPCB05D7/14B05D2202/10B05D7/54B05D2252/10B32B15/09B32B27/20B32B27/36B32B2367/00B32B2307/4026B32B27/08B32B37/10B32B2311/30B32B2439/00B65D25/14
Inventor 山中洋一郎北川淳一中丸裕树
Owner JFE STEEL CORP
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