Food containers for low-temperature storage

JP7898250B2Inactive Publication Date: 2026-07-31OTSUKA HOSO INDS
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
OTSUKA HOSO INDS
Filing Date
2020-03-14
Publication Date
2026-07-31
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Benefits of technology

【0009】 本発明の第1の側面に係る低温保存用食品容器によれば、ポリプロピレン系樹脂を含む表面層と、前記表面層と積層された、ポリプロピレン系樹脂であるブロックコポリマー(b-PP)と、直鎖状低密度ポリエチレン(LLDPE)と、バイオマス由来の高密度ポリエチレン(HDPE)とを含む中間層とを有する積層体により形成され、前記中間層のブロックコポリマーの比率を10~40重量%、LLDPEの比率を20~60重量%とすることができる。上記構成により、表面層で耐熱性を高めることができる。

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Abstract

To provide a food container for low-temperature storage that is improved in rigidity while having cold resistance and heat resistance.SOLUTION: A food container 100 for low-temperature storage has: a surface layer 31 which includes polypropylene resin; and an intermediate layer 32 which is laminated on the surface layer 31, and includes b-PP, LLDPE, and HDPE as biomass-derived ethylene-based resin. The intermediate layer 32 may further include HDPE.SELECTED DRAWING: Figure 5
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Claims

1. A surface layer containing polypropylene resin, The aforementioned surface layer is laminated with an intermediate layer comprising a block copolymer, which is a polypropylene resin, LLDPE, and HDPE, which is a biomass-derived ethylene resin. Formed by a laminate having, The aforementioned surface layer does not contain polyethylene resin. A food container for low-temperature storage, wherein the ratio of the block copolymer in the intermediate layer is relatively low compared to the surface layer, and is 10 to 40% by weight, and the ratio of LLDPE is 20 to 60% by weight.

2. A food container for low-temperature storage according to claim 1, A food container for low-temperature storage, wherein the intermediate layer further contains HDPE.

3. A food container for low-temperature storage according to claim 1 or 2, A food container for low-temperature storage, comprising the surface layer on both sides of the intermediate layer.

4. A food container for low-temperature storage according to any one of claims 1 to 3, A food container for low-temperature storage, wherein the surface layer is composed solely of block copolymer.

5. A food container for low-temperature storage according to any one of claims 1 to 4, A food container for low-temperature storage in which the ratio of the block copolymer, consisting of the surface layer and the intermediate layer combined, is greater than 50% by weight.

6. A food container according to any one of claims 1 to 5, further, It has multiple partition walls, A food container having the upper surfaces of the multiple partition walls formed in a stepped manner.

7. A food container according to claim 6, Multiple steps are formed on the upper surface of the multiple partition wall sections. A food container in which the multiple steps are continuously formed in each partition wall section such that the center is recessed.