Decorative Sheet Gloss Layers for Scratch Resistance and Adhesion

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Solution Overview

Problem

Existing decorative sheets lack sufficient scratch resistance and adherence between gloss-adjustment layers, which can lead to degradation and reduced durability.

Innovation Solution

A decorative sheet design incorporating a primary film layer with a first gloss-adjustment layer made of a cured product of a first ionizing radiation curable resin mixture of acrylate and methacrylate, and a second gloss-adjustment layer with a lower specular gloss, featuring an uneven structure and a cured product of a second ionizing radiation curable resin, to enhance scratch resistance and adherence.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional gloss-adjustment layers are used to create three-dimensional texture effects, then the decorative appearance is achieved, but scratch resistance and adherence between layers deteriorate

Engineering Contradiction:
Improvescratch resistanceVSAvoidadherence between gloss-adjustment layers
Core Design Contradiction:
ReliabilityVSStrength

Solution Approach 1:

The invention divides the gloss-adjustment structure into multiple distinct layers (first gloss-adjustment layer and second gloss-adjustment layer), each with specific resin compositions. This segmentation allows each layer to be optimized independently for scratch resistance and adherence, resolving the contradiction between these two properties that cannot be simultaneously achieved in a single-layer system.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The invention uses composite resin materials in each gloss-adjustment layer, combining different ionizing radiation curable resins with specific functional properties. The first layer contains resins optimized for adherence to the base layer, while the second layer contains resins optimized for scratch resistance, creating a composite structure that achieves both requirements simultaneously.

Inventive Principle:
Principle #40Composite materials

2Shape

If multiple gloss-adjustment layers are added to achieve three-dimensional texture, then the decorative effect is improved, but the structural complexity increases

Engineering Contradiction:
Improvethree-dimensional texture effectVSAvoidlayer structure complexity
Core Design Contradiction:
ShapeVSDevice complexity

Solution Approach 1:

The invention creates three-dimensional texture effects by manipulating the optical properties (glossiness) of multiple layers rather than creating actual physical asperities. This dimensional approach to texture creation allows complex visual effects without proportionally increasing structural complexity, as the texture is achieved through optical illusion rather than physical depth.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

Solution Approach 2:

The invention applies different glossiness levels to specific local areas of each layer to create the three-dimensional texture effect. By controlling which areas are glossy and which are matte, the patent achieves complex visual textures without requiring complex overall layer structures, resolving the contradiction between visual complexity and structural simplicity.

Inventive Principle:
Principle #3Local quality

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 design provides improved scratch resistance and adherence between gloss-adjustment layers, enhancing the durability and flexibility of the decorative sheet while maintaining a three-dimensional texture effect.

Implementation Method 1

a first gloss-adjustment layer that is provided on the primary film layer and contains only a cured product of a first ionizing radiation curable resin as a cured resin, the first ionizing radiation curable resin being a first mixture of an acrylate and a methacrylate

Methodology Applied
Scientific EffectIonizing radiation curable: Photopolymerisation

Data Source

PatentUS20260108912A1Decorative sheet
Publication Date: 2026.04.23 TOPPAN HOLDINGS INC
  • US20260108912A1 patent drawing
  • US20260108912A1 patent drawing
  • US20260108912A1 patent drawing

AI summary

A decorative sheet with improved scratch resistance and adherence between gloss-adjustment layers is provided. The decorative sheet includes a primary film layer and a surface protective layer. The surface protective layer includes a first gloss-adjustment layer that is provided on the primary film layer and contains only a cured product of a first ionizing radiation curable resin as a cured resin, the first ionizing radiation curable resin being a first mixture of an acrylate and a methacrylate, and a second gloss-adjustment layer that partially covers an upper surface of the first gloss-adjustment layer, contains only a cured product of a second ionizing radiation curable resin as a cured resin, and has a lower specular gloss GS) (60° than the first gloss-adjustment layer.