Pressure-Induced Phase Transition Particles for Bonded Printed Materials
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods for producing printed materials struggle to achieve a high initial bonding force that remains intact when stored at high temperatures and high humidity, particularly when using recording media with specific roughness and coverage levels.
Innovation Solution
A method involving pressure-induced phase transition particles with a styrene resin and a (meth)acrylic acid ester resin, where the mass ratio of (meth)acrylic acid esters is 90% or more, applied to a recording medium with an arithmetic average roughness between 0.07 μm and 3.80 μm, forming a phase transition particle layer with coverage between 30% and 90%, enhancing bonding force and resistance to breaking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If pressure-induced phase transition particles containing homopolymer (meth)acrylic acid ester resin are used, then the initial bonding force is achieved, but the material breaks when stored at high temperature and high humidity
Solution Approach 1:
The patent uses composite particles containing both styrene resin and (meth)acrylic acid ester resin in a specific ratio (90:10 or more). This composite structure combines the pressure-sensitive bonding properties of (meth)acrylic acid ester resin with the thermal stability of styrene resin, achieving both high initial bonding force and resistance to breaking under high temperature and humidity conditions
Solution Approach 2:
The patent optimizes the glass transition temperature difference between the two resins to be 30°C or more, and controls the particle size within specific ranges (5-50 μm for styrene resin, 1-20 μm for (meth)acrylic acid ester resin). These parameter optimizations ensure that the particles provide sufficient bonding force initially while maintaining stability under elevated temperature and humidity conditions
2Adaptability or versatility
If the coverage of pressure-induced phase transition particles is less than 30% or more than 90%, then the material shows improved flexibility, but the bonding force and resistance to breaking are insufficient
Solution Approach 1:
The patent applies pressure-induced phase transition particles at a coverage of 30-90%, which is a partial coverage that balances bonding performance and flexibility. This intermediate coverage level provides sufficient bonding force while maintaining the flexibility of the recording medium, avoiding the brittleness associated with full coverage
3Manufacturing precision
If the arithmetic average roughness Ra of the recording medium is less than 0.07 μm or more than 3.80 μm, then the surface quality is improved, but the bonding force and resistance to breaking are reduced
Solution Approach 1:
The patent optimizes the arithmetic average roughness Ra of the recording medium to be within 0.07-3.80 μm. This parameter optimization ensures that the surface provides sufficient mechanical interlocking for the particles while maintaining acceptable surface quality. The optimized roughness range allows the particles to anchor effectively without creating excessive surface defects
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 method produces a pressure-bonded printed material with a high initial bonding force that withstands high temperature and humidity storage without breaking, outperforming materials made with homopolymer (meth)acrylic acid ester resins.
Implementation Method 1
pressure-induced phase transition particles
Implementation Method 2
the difference between the lowest glass transition temperature and the highest glass transition temperature among the glass transition temperatures exhibited by the pressure-induced phase transition particles is 30° C. or more
Data Source
AI summary
A method for producing a printed material includes providing pressure-induced phase transition particles on a recording medium having an arithmetic average roughness Ra of 0.07 μm or more and 3.80 μm or less to form a pressure-induced phase transition particle layer having a coverage C within a range of 30% to 90%; bonding the pressure-induced phase transition particles onto the recording medium; and folding the recording medium having the pressure-induced phase transition particles bonded thereon and pressure-bonding the folded recording medium, or pressure-bonding the recording medium having the pressure-induced phase transition particles bonded thereon and another recording medium placed on top of each other. The pressure-induced phase transition particles have at least two glass transition temperatures, and the difference between the lowest glass transition temperature and the highest glass transition temperature among the glass transition temperatures exhibited by the pressure-induced phase transition particles is 30° C. or more.