Heat-Sensitive Recording Coating With Diffusion Barrier for Adhesive Labels
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing heat-sensitive recording materials for self-adhesive tickets face issues with silicone penetration into the recording layer, leading to reduced sensitivity and complex, expensive manufacturing processes, and require additional release papers.
Innovation Solution
A heat-sensitive recording material with a diffusion layer containing a silicone component and an intermediate layer with hollow pigments, ensuring effective adhesion and sensitivity while eliminating the need for additional release papers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a silicone layer is applied to prevent penetration into the paper web, then adhesion is improved, but silicone penetration into the recording layer occurs which reduces sensitivity
Solution Approach 1:
The patent divides the coating structure into multiple functional layers: a silicone-containing adhesive layer for adhesion, a middle layer acting as a barrier to prevent silicone penetration, and a recording layer for heat-sensitive color formation. This segmentation allows each layer to perform its specific function without interfering with others.
Solution Approach 2:
The patent introduces a middle layer as an intermediary between the silicone-containing adhesive layer and the recording layer. This intermediate layer prevents harmful silicone penetration while allowing the adhesive layer to maintain its bonding function, thus protecting the sensitivity of the recording layer.
2Strength
If a protective layer with filler and binder components is added to prevent silicone penetration, then adhesion is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent combines multiple functions into a single middle layer that simultaneously acts as a barrier to silicone penetration, provides adhesion support, and maintains sensitivity. This merging reduces the need for separate protective layers with complex filler and binder compositions, simplifying the production process.
Solution Approach 2:
The middle layer is designed to perform multiple functions: preventing silicone penetration, providing structural support, maintaining adhesion, and preserving heat sensitivity. This multi-functionality eliminates the need for additional specialized layers, reducing manufacturing complexity.
3Reliability
If the recording layer is made highly sensitive to external heat, then image formation is improved, but adhesion to adhesive layers deteriorates
Solution Approach 1:
The patent separates the adhesion function (performed by the silicone-containing adhesive layer) from the heat-sensitive recording function (performed by the recording layer). The middle layer acts as a buffer that prevents silicone from reaching the recording layer, allowing both high adhesion and high sensitivity to coexist.
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 material maintains high sensitivity and adhesion, allowing for self-adhesive use without additional release papers, with a cost-effective manufacturing process.
Implementation Method 1
UV-crosslinking
Implementation Method 2
diffusion layer formed by a silicone component
Data Source
Figure 1
AI summary
Proposed is a heat-sensitive recording material - with a web-like substrate (1) having a front side and a back side opposite the front side, - with a heat-sensitive recording layer (3) arranged on the front side of the web-like substrate (1), this heat-sensitive recording layer (3) having at least one contains a dye precursor and at least one (color) developer capable of reacting with this at least one dye precursor, - with a front surface (6) of the heat-sensitive recording material, which is designed to be adhesive with respect to adhesive layers (7) that can be applied to the back of the web-like substrate (1 ), wherein the heat-sensitive recording material proposed here is characterized in that the heat-sensitive recording material to form its dehesive front surface (6) ▪ one above the heat-sensitive recording layer (3) a arranged exposure (5) having at least one release agent and ▪ a diffusion layer (4) formed between the exposure (5) having at least one release agent and the heat-sensitive recording layer (3) To the same extent, a method for the production of such a heat-sensitive recording material and possibilities of it suggested use.