Peel Detection Label Laminate for Clean Removal and Clear Patterning
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Solution Overview
Problem
Conventional peel detection labels leave adhesive residue on the adherend and fail to exhibit excellent pattern expressibility when peeled at low speeds.
Innovation Solution
A peel detection label comprising a support, a pattern layer, and a pressure-sensitive adhesive laminate with a low modulus layer, a high modulus layer, and a pressure-sensitive adhesive layer, designed to minimize adhesive residue and ensure effective peeling detection at low speeds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional peel detection label is used, then the label can detect peeling, but adhesive residue remains on the adherend
Solution Approach 1:
The pressure-sensitive adhesive laminate is segmented into three distinct layers: a low modulus layer (X), a high modulus layer (Y), and a pressure-sensitive adhesive layer (Z). This segmentation allows each layer to perform its specific function - the low modulus layer prevents residue, the high modulus layer provides structural support, and the adhesive layer ensures bonding, thereby eliminating adhesive residue while maintaining peel detection capability.
Solution Approach 2:
The invention uses a composite structure combining materials with different mechanical properties in the pressure-sensitive adhesive laminate. The low modulus layer (X) with specific elastic modulus (10^4 to 10^6 Pa) is复合ed with a high modulus layer (Y) and an adhesive layer (Z), creating a composite material system that simultaneously achieves clean peeling and reliable adhesion for peel detection.
2Ease of operation
If the label is peeled at low speed, then gentle handling is possible, but pattern expressibility deteriorates
Solution Approach 1:
The invention optimizes the elastic modulus parameter of the low modulus layer (X) within a specific range (10^4 to 10^6 Pa) and controls its thickness (1 μm to 100 μm). By adjusting these parameters, the label achieves optimal balance between low-speed peeling ease and pattern expressibility, allowing the pattern layer to detach cleanly and form visible patterns even during slow peeling operations.
Solution Approach 2:
The pattern layer is designed with local quality characteristics, being formed only in specific regions rather than uniformly across the entire label. This localized pattern formation, combined with the specific properties of the low modulus layer, ensures that patterns are clearly expressed during peeling while the rest of the label maintains its adhesive functionality for detection purposes.
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 prevents adhesive residue and allows for excellent pattern expressibility by ensuring interfacial peeling, making peeling detection visually discernible even at low speeds.
Implementation Method 1
the low modulus layer (X), a high modulus layer (Y) and a pressure-sensitive adhesive layer (Z) in that order, in which the low modulus layer (X) has a surface in contact with the support and the pattern layer
Data Source
Figure 1~2
Figure 3
AI summary
The invention relates to a peel detection label that is a laminate including a support, a pattern layer formed in a part of the surface of the support, and a pressure-sensitive adhesive laminate having at least a low modulus layer (X), a high modulus layer (Y) and a pressure-sensitive adhesive layer (Z) in that order, in which the low modulus layer (X) has a surface in contact with the support and the pattern layer and a surface in contact with the high modulus layer (Y), and satisfies the following requirement (1): Requirement (1): when the pressure-sensitive adhesive layer (Z) of the peel detection label is attached to an adherend and then the peel detection label is peeled off from the adherend, the maximum vertical tensile stress applied to an element of the low modulus layer (X) that is located closest to the support is 0.19 MPa or more when analyzed by a finite element method using Abaqus.