Polyester containers

JP7875043B2Active Publication Date: 2026-06-17LINTEC CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
LINTEC CORP
Filing Date
2022-06-16
Publication Date
2026-06-17

AI Technical Summary

Technical Problem

Recycling of polyester containers with adhesive labels made of the same resin base material and adhesive as the container results in yellowness and haze exceeding specified values, making the recycled products unusable, and the process of removing labels is complicated and costly.

Method used

A polyester container with an adhesive label comprising a polyester resin substrate, a polyester adhesive layer, and optional desorption and alkali-insoluble coating layers, where the adhesive label's mass is less than 5% of the container's mass, with a total light transmittance of 70% or more, and the alkali-insoluble coating layer is composed of urethane-modified polyester resin.

Benefits of technology

The solution reduces yellowness and haze of the recycled product to a predetermined value, facilitating efficient recycling by maintaining the adhesive label's integrity and adhesion until recycling, thereby improving the quality of the recycled polyester.

✦ Generated by Eureka AI based on patent content.

Smart Images

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Patent Text Reader

Abstract

To provide a polyester-based container allowing yellowness and haze of the recycled products to be reduced to a specified value or less when the polyester-based container to which an adhesive label comprising an adhesive and resin base material made of the same as that of the polyester-based container is attached is recycled.SOLUTION: In a polyester-based container having an adhesive label stuck thereon, the adhesive label is made of a polyester-based resin base material and has a polyester-based adhesive layer. The mass of the adhesive label is less than 5% of the mass obtained by subtracting the mass of the adhesive label from the mass of the polyester-based container.SELECTED DRAWING: Figure 1
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