Pretreatment Liquid Composition for Boil-Resistant Inkjet Laminates
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Solution Overview
Problem
Existing image recording methods using pretreatment liquids and inks for impermeable base materials face challenges in achieving both storage stability and boiling resistance in laminates, particularly when forming images on such materials.
Innovation Solution
A pretreatment liquid for ink jet ink containing specific aggregating agents like organic acids, polyvalent metal compounds, and metal complexes, combined with a urethane resin having polyol, polyisocyanate, and polyalkylene glycol monoalkyl ether units, is applied to impermeable base materials, followed by ink jet inks, to enhance adhesion and flexibility, thereby improving laminate boiling resistance and storage stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pretreatment liquid is applied to improve adhesion and flexibility for boiling resistance, then laminate boiling resistance is improved, but storage stability deteriorates
Solution Approach 1:
The patent changes the chemical parameters of the pretreatment liquid by specifying precise compositional ratios: aggregating agent content (0.1-10 mass%), urethane resin content (1-30 mass%), and molecular weight ranges for polyalkylene glycol monoalkyl ether (500-20,000) and urethane resin (3,000-200,000). These parameter optimizations enable the liquid to achieve both boiling resistance and storage stability by controlling the balance between aggregating agent and resin components.
Solution Approach 2:
The patent creates a composite pretreatment liquid system combining multiple components: aggregating agents (organic acids, polyvalent metal compounds, or metal complexes) with urethane resins containing specific units (polyol, polyisocyanate, polyalkylene glycol monoalkyl ether). This composite formulation allows the liquid to simultaneously provide adhesion enhancement for boiling resistance and maintain storage stability through the synergistic interaction of components.
2Reliability
If aggregating agent is added to improve layer compatibility and adhesiveness, then laminate boiling resistance is improved, but resin dispersibility deteriorates
Solution Approach 1:
The patent optimizes the concentration parameter of the aggregating agent to a specific range (0.1-10 mass% of total liquid), which is sufficient to improve layer compatibility and adhesiveness but not excessive enough to cause resin aggregation and poor dispersibility. This precise parameter control resolves the contradiction between boiling resistance and resin dispersibility.
Solution Approach 2:
The patent introduces the urethane resin as an intermediary substance that mediates between the aggregating agent and the impermeable base material. The urethane resin contains specific units (polyol, polyisocyanate, polyalkylene glycol monoalkyl ether) that facilitate interaction with both the aggregating agent and the substrate, enabling improved adhesion while maintaining resin dispersibility through its molecular structure.
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 solution provides laminates with enhanced boiling resistance and storage stability by improving layer compatibility and adhesiveness, ensuring durability under boiling conditions and maintaining resin dispersibility.
Implementation Method 1
at least one aggregating agent selected from the group consisting of an organic acid, a polyvalent metal compound, and a metal complex
Implementation Method 2
a urethane resin, in which the urethane resin has a polyol unit, a polyisocyanate unit, and a polyalkylene glycol monoalkyl ether unit
Data Source
AI summary
Provided are a pretreatment liquid for an ink jet ink, including at least one aggregating agent selected from the group consisting of an organic acid, a polyvalent metal compound, and a metal complex, water, and a urethane resin, in which the urethane resin has a polyol unit, a polyisocyanate unit, and a polyalkylene glycol monoalkyl ether unit, and an application thereof.