Polyethylene-based resin composition for foamable laminated body, foamable laminated body, method for producing same, foam-processed paper, and heat insulation container

A polyethylene-based resin and a technology for a manufacturing method, which are applied in the field of polyethylene-based resin compositions for foamable laminates, can solve the problems of poor microwave applicability, damage to appearance, and poor appearance, and achieve the effect of excellent microwave applicability

Active Publication Date: 2018-10-23
JAPAN POLYETHYLENE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional containers have a problem of poor applicability in microwave ovens
That is, there is a problem that the foamed cells expand and communicate with each other to cause a phenomenon that the surface of the foamed layer is raised (foam formation) and the enlarged foamed cells are broken by the foam formation to produce unevenness on the surface, due to This damage looks
[0011] However, in conventional heat-insulating containers for microwave cooking, when the processing speed is high, the appearance is poor when foaming by heating and the container has not reached the level required in this field, so there is room for improvement

Method used

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  • Polyethylene-based resin composition for foamable laminated body, foamable laminated body, method for producing same, foam-processed paper, and heat insulation container
  • Polyethylene-based resin composition for foamable laminated body, foamable laminated body, method for producing same, foam-processed paper, and heat insulation container
  • Polyethylene-based resin composition for foamable laminated body, foamable laminated body, method for producing same, foam-processed paper, and heat insulation container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0208] As the resin used for the polyethylene-based resin layer (thermoplastic resin layer) (II), an MFR of 6 g / 10 minutes and a density of 0.942 g / cm were used 3 Medium density polyethylene with a melting temperature of 130°C.

[0209] The unit weight is 320g / m 2 And the paper substrate with a moisture content of 7% carries out corona treatment (30W.min / m 2 ). Using a 90 mmφ extruder (manufactured by Sumitomo Heavy Industries Modern, Ltd.) and an extrusion laminator with an air gap of 110 mm and a die effective width of 560 mm, polyethylene was formed in a thickness of 40 μm at a resin temperature of 320° C. and Extrusion lamination processing was performed thereon at a processing speed of 50 m / min, whereby a laminate of the polyethylene-based resin layer (thermoplastic resin layer) (II) and the paper base material was obtained.

[0210] Next, corona treatment (30W·min / m 2 ). The polyethylene-based resin (A-1) shown in the following Table 2 was supplied to a film having ...

Embodiment 2

[0213] A foamable laminate was obtained in the same manner as in Example 1 except that the polyethylene resin (A-2) shown in Table 2 below was used as the resin for the polyethylene-based resin layer (I).

[0214] Table 3 shows the evaluation results of the obtained foamable laminate. Good results for foam appearance and foam height were obtained both at a processing speed of 55 m / min and at a processing speed of 65 m / min. In addition, in terms of microwave oven applicability, no abnormality was observed in the foamed layer.

Embodiment 3

[0216] A foamable laminate was obtained in the same manner as in Example 1 except that the polyethylene resin (A-3) shown in Table 2 below was used as the resin for the polyethylene-based resin layer (I).

[0217] Table 3 shows the evaluation results of the obtained foamable laminate. Good results for foam appearance and foam height were obtained both at a processing speed of 55 m / min and at a processing speed of 65 m / min. In addition, in terms of microwave oven applicability, no abnormality was observed in the foamed layer.

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Abstract

The present invention provides a polyethylene-based resin composition for foamable laminated bodies which has excellent suitability for microwave ovens and from which foam cells (foamed layer) havinga sufficient height and an excellent appearance can be obtained at excellent productivity by heating. The present invention is a polyethylene-based resin composition for foamable laminated bodies which forms, on at least one surface of a paper base, a polyethylene-based resin layer (I) for foaming, the polyethylene-based resin composition for foamable laminated bodies containing a polyethylene-based resin (A) that satisfies: a feature (a-1) of having an MFR of not lower than 6 g / 10 min but lower than 20 g / 10 min; a feature (a-2) of having a density of 0.920-0.930 g / cm3; and a feature (a-3) inwhich the percentage of an eluted substance having an elution temperature of not lower than 70 DEG C is 47-83 wt% in an elution curve obtained by means of temperature rising elution fractionation (TREF) using ortho-dichlorobenzene.

Description

technical field [0001] The present invention relates to a polyethylene-based resin composition for a foamable laminate, a foamable laminate, a method for producing the same, a foamed processed paper, and a heat-insulating container. More specifically, the present invention relates to a polyethylene-based resin for foamable laminates that obtains foamed cells (foamed layer) having sufficient height and good appearance by heating with good productivity and is excellent in microwave oven applicability Composition, foamable laminate, method for producing the same, foamed processed paper, and heat-insulating container. Background technique [0002] Conventionally, synthetic resin foams have been often used as heat-insulating containers. As a container that is easy to discard and has good printability, there are known heat-insulating paper containers using multiple sheets of paper and materials using a paper base material on which polyethylene-based resin layers are laminated on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32B32B5/24B65D65/40B65D81/34C08J9/04
CPCB32B1/02B32B3/30B32B5/022B32B5/024B32B5/20B32B5/245B32B7/02B32B7/12B32B15/046B32B15/082B32B15/085B32B15/088B32B15/09B32B27/065B32B27/08B32B27/10B32B27/20B32B27/302B32B27/304B32B27/306B32B27/308B32B27/32B32B27/34B32B27/36B32B27/365B32B29/005B32B29/007B32B29/02B32B29/06B32B2255/12B32B2255/20B32B2255/205B32B2266/025B32B2270/00B32B2307/102B32B2307/306B32B2307/718B32B2307/72B32B2307/732B32B2307/744B32B2307/75B32B2439/02B32B2439/70B32B5/18B32B5/24B65D65/40B65D81/34C08J9/04C08L23/06B32B2307/304B32B2439/00C08F10/02C08J2201/03C08J2323/06C08J2323/08Y10T428/1303Y10T428/1376
Inventor 佐佐木桂一坂本慎治
Owner JAPAN POLYETHYLENE CORP
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