Pretreatment Liquid Resin Composition for Impermeable Substrates
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Solution Overview
Problem
Image recording on impermeable base materials faces challenges with insufficient adhesiveness and significant streak unevenness when using pretreatment liquids containing resins and aqueous media.
Innovation Solution
A pretreatment liquid with a resin having specific hydrophilic structural units and a glass transition temperature between -40°C and 100°C, along with a limited content of alkyl (meth)acrylate, is applied to improve adhesiveness and reduce streak unevenness by enhancing the wettability and film-forming properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pretreatment liquid containing resin and aqueous medium is applied to an impermeable base material, then the image recording process can be performed, but the adhesiveness of the image to the base material becomes insufficient
Solution Approach 1:
The patent changes the chemical composition parameters of the pretreatment liquid by specifying precise ranges: resin content of 1-50 mass%, aqueous medium content of 50-98 mass%, and controlled water solubility of the resin (0.1-10 mass%). These parameter adjustments optimize the liquid's ability to penetrate and bond with impermeable base materials while maintaining image quality.
Solution Approach 2:
The pretreatment liquid is formulated as a composite system combining multiple components: resin (providing bonding), aqueous medium (providing penetration and solubility control), and optional additives. This composite formulation enables simultaneous achievement of penetration, adhesion, and image quality on impermeable surfaces.
2Reliability
If a pretreatment liquid containing resin and aqueous medium is applied to an impermeable base material, then the image recording process can be performed, but streak unevenness of the image becomes significant
Solution Approach 1:
The patent controls multiple parameters to prevent streak unevenness: resin content (1-50 mass%), aqueous medium content (50-98 mass%), water solubility of resin (0.1-10 mass%), and glass transition temperature (-50°C to 100°C). These parameter optimizations ensure uniform drying and bonding without streak formation.
Solution Approach 2:
The patent ensures uniform distribution of resin and aqueous medium throughout the pretreatment liquid formulation, creating consistent local properties across the entire liquid composition. This homogeneity prevents localized variations in drying behavior that would cause streak unevenness.
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 effectively improves the adhesiveness of images to impermeable base materials while suppressing streak unevenness, ensuring better image quality and stability.
Implementation Method 1
a pretreatment liquid which is used for a pretreatment that is performed on an impermeable base material before an image is recorded on the impermeable base material and is capable of achieving both improvement of the adhesiveness of the image to the impermeable base material and suppression of streak unevenness of the image
Implementation Method 2
a pretreatment liquid containing a resin; and an aqueous medium
Data Source
AI summary
A pretreatment liquid is a pretreatment liquid to be used for a pretreatment that is performed on an impermeable base material before an image is recorded on the impermeable base material, including a resin and an aqueous medium, in which the resin has at least one selected from the group consisting of a structural unit (1), and a structural unit (2), a glass transition temperature of the resin is −40° C. or higher and lower than 100° C., and a content of an alkyl (meth)acrylate unit containing a C2 or more chain alkyl group in the resin is less than 5% by mass. In the formulae, R2 represents a hydrogen atom or a C1 to C4 alkyl group, A2 represents —NH— or —N(L4-Y4)—, L2 and L4 represent a divalent group or a single bond, L3 represents a divalent group, Y2 and Y4 represent a monovalent group such as an alkyl group, and Y3 represents a monovalent group such as —OH.