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Multilayer resin sheet for deep drawing and deep molding and molded container

A deep forming, resin sheet technology, applied in the field of forming containers, can solve problems such as sheet surface adhesion

Pending Publication Date: 2020-07-31
DENKA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the multilayer resin sheets described in Patent Documents 1 to 3 are directly heated in which the heat source is in contact with the sheet, if the temperature of the hot plate is increased, the surface of the sheet may be thermally adhered to the heat source, which cannot be used Problems in deep drawing that require higher temperature than conventional hot plate

Method used

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  • Multilayer resin sheet for deep drawing and deep molding and molded container
  • Multilayer resin sheet for deep drawing and deep molding and molded container
  • Multilayer resin sheet for deep drawing and deep molding and molded container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Using two 40mm single-screw extruders and one 65mm single-screw extruder, the following multi-layer resin sheet was obtained by the feed tube method: it has a styrene-based resin layer (12a) 165 μm / modified olefin Polymer-like layer (11a) 35 μm / oxygen-barrier resin layer (10) 15 μm / modified olefin-based polymer layer (11b) 35 μm / styrene-based resin layer (12b) 650 μm, with a thickness of 900 μm (styrene The total thickness of the resin-like layer (12a) and the modified olefin-based polymer layer (11a) is 200 μm), using a metal roll with a roughness (Ra) of 0.5 μm on the pick-up roll to obtain a styrene-based A multilayer resin sheet in which the surface roughness (Ra) of the resin layer (12a) is 0.23 μm.

Embodiment 2

[0068] Using the same method as in Example 1, the following multilayer resin sheet was obtained: having a styrene resin layer (12a) 40 μm / modified olefin polymer layer (11a) 20 μm / oxygen barrier resin layer (10) 20 μm / Modified olefin polymer layer (11b) 20 μm / styrene resin layer (12b) 800 μm layer composition, thickness is 900 μ m (distance between styrene resin layer (12a) and modified olefin polymer layer (11a) The total thickness is 60 μm), and the surface roughness (Ra) of the styrene-based resin layer ( 12 a ) is 0.25 μm.

Embodiment 3

[0070] Using the same method as in Example 1, the following multilayer resin sheet was obtained: styrene resin layer (12a) 285 μm / modified olefin polymer layer (11a) 15 μm / oxygen barrier resin layer (10) 20 μm / Modified olefin polymer layer (11b) 15 μm / styrene resin layer (12b) 665 μm layer composition, thickness is 1000 μ m (distance between styrene resin layer (12a) and modified olefin polymer layer (11a) The total thickness is 300 μm), and the surface roughness (Ra) of the styrene-based resin layer ( 12 a ) is 0.30 μm.

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Abstract

The invention provides a method for manufacturing a deeply drawn and deeply molded container, a multilayer resin sheet for deep drawing and deep molding, and a molded container. The multilayer resin sheet for deep drawing and deep molding has a thermal forming property, rigidity, and an oxygen barrier property, facilitates the imparting of groove breaking properties after thermoforming, and does not easily thermally adhere to a heat source even when imparted with high heat when molded into a container having a complex shape and deep drawing. The manufacturing method includes molding a multilayer resin sheet at a hot plate temperature of 170 DEG C or more and less than 185 DEG C, is the multilayer resin sheet is characterized in that the multilayer resin sheet has a surface roughness imparted thereto by being picked up using a roll having undergone embossing, is obtained by laminating styrene-based resin layers on both surfaces of an oxygen-blocking resin layer with a modified olefin-based polymer layer interposed therebetween, and has grooves formed from one surface side. The total thickness of the modified olefin-based polymer layer and the styrene-based resin layer on the one surface side is 40-350 [mu]m, and the surface roughness (Ra) of the styrene-based resin layer on the one surface side is 0.1-5.0 [mu]m.

Description

[0001] This application is a divisional application of an application with an application date of February 22, 2013, an application number of CN201310057159.2, and an invention title of "Multilayer resin sheet for deep drawing and forming container". technical field [0002] The invention relates to a multi-layer resin sheet for deep drawing and a molding container obtained by molding it. Background technique [0003] Hitherto, styrene-based resins excellent in thermoformability and rigidity have been used as containers for soft drinks, juice drinks, delicacies, and the like. However, in recent years, a multilayer resin sheet having a styrene-based resin layer as the outermost layer and an adhesive layer such as a modified olefin-based resin interposed therebetween, and multilayer containers composed of the multilayer resin sheet, have become popular. An ethylene-vinyl alcohol copolymer resin layer is provided next to each other to impart oxygen barrier properties and suppre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B1/02B32B27/08B32B27/18B32B27/30B32B27/32B32B7/022B32B7/027B32B33/00B65D1/28B32B1/00
Inventor 小茂田含中里利胜中岛康次
Owner DENKA CO LTD
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