Shrinkable Resin-Container Labels With Transparent Oxide Barriers

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Solution Overview

Problem

Conventional heat shrinkable labels for resin containers fail to provide adequate barrier properties to prevent contamination of contents by ink components and adhesive residues, while maintaining transparency and tamper-proof integrity.

Innovation Solution

A label comprising a transparent vapor-deposited film of inorganic oxide and an adhesive layer with a triblock copolymer, which includes a block structure of segment A1-segment B-segment A2, is used to wrap and shrink-wrap resin containers, preventing contamination and ensuring transparency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a heat shrinkable label with print layer is used on resin containers, then the label provides tamper-proof property and adhesion, but ink components permeate through the resin container and contaminate the contents

Engineering Contradiction:

Improvetamper-proof propertyVSAvoidcontamination by ink components

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

A barrier layer comprising a polyvinylidene chloride copolymer is introduced between the print layer and the resin container to prevent permeation of ink components while maintaining the tamper-proof function of the label

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The label is constructed as a multi-layer composite structure including a heat shrinkable base material, print layer, barrier layer, and adhesive layer, where each layer serves a specific function to simultaneously achieve adhesion, tamper-proof property, and contamination prevention

Inventive Principle:

Principle #40Composite materials

2Strength

If conventional adhesive layers are used to adhere the label to the resin container, then the label provides strong adhesion, but residual monomer in the adhesive layer contaminates the container and leaves adhesive residue

Engineering Contradiction:

Improveadhesion strengthVSAvoidcontamination by adhesive residue

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The adhesive layer uses a copolymer composition with specific glass transition temperatures (segment A1: 80-100°C, segment B: -50-0°C) to optimize adhesion strength while preventing contamination and residue formation

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The barrier layer comprising polyvinylidene chloride copolymer serves as an intermediary between the adhesive layer and the resin container, preventing migration of adhesive components to the container while maintaining strong adhesion

Inventive Principle:

Principle #24Intermediary (Mediator)

3Object-affected harmful factors

If the label structure includes multiple layers for barrier properties, then contamination is prevented, but the label loses transparency

Engineering Contradiction:

Improvecontamination preventionVSAvoidtransparency

Core Design Contradiction:

Object-affected harmful factorsVSIllumination intensity

Solution Approach 1:

The barrier layer is designed as a thin film structure that provides effective contamination prevention while maintaining label transparency, allowing visual confirmation of container contents

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The multi-layer composite structure is engineered with specific material selections and thicknesses to achieve both barrier function and transparency, enabling contamination prevention without sacrificing visual inspection capability

Inventive Principle:

Principle #40Composite materials

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The label effectively suppresses contamination and adhesive residue, maintaining excellent barrier and transparency properties, while ensuring tamper-proof integrity.

Implementation Method 1

at least one transparent vapor-deposited film consisting of an inorganic oxide... suppression of contamination and adhesive residue

Methodology Applied

Scientific EffectPermeation barrier: Semipermeable Membrane

Implementation Method 2

an adhesive layer, wherein the adhesive layer comprises an adhesive composition comprising a triblock copolymer

Methodology Applied

Scientific EffectAdhesive bonding: Adhesive

Implementation Method 3

heat-shrinking the shrinkable label... shrink-wrapping a container body of a resin container

Methodology Applied

Scientific EffectThermal contraction: Thermal Contraction

Data Source

PatentUS20250333226A1label

Publication Date: 2025.10.30 LINTEC CORP

AI summary

The present invention provides a label having excellent barrier property and transparency, wherein contamination of the container and adhesive residue due to the residual monomer in the adhesive layer are suppressed. The label is a label that is used for shrink-wrapping a container body of a resin container by wrapping around a barrel of the container body and heat-shrinking the shrinkable label, wherein the label comprises at least one heat shrinkable base material, a transparent vapor-deposited film consisting of an inorganic oxide, and an adhesive layer, and the adhesive layer comprises an adhesive composition comprising a triblock copolymer having a block structure of segment A1-segment B-segment A2.