Aqueous Ink Composition Adhesion to Olefin Resins
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Solution Overview
Problem
Existing aqueous ink compositions for inkjet ejection face challenges in achieving high adhesion to various base materials, particularly olefin resins, without surface treatment.
Innovation Solution
An aqueous ink composition containing a resin with a polymer that includes a monomer A with a ring structure and an ethylenically unsaturated bond, which enhances adhesion to base materials, including olefin resins with or without surface treatment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional binder resin is used in aqueous ink composition, then the abrasion resistance of recorded matter is improved, but the adhesion to various base materials especially olefin resins deteriorates
Solution Approach 1:
The invention changes the chemical structure parameters of the binder resin by specifying a polymer containing monomer A (having a ring structure and ethylenically unsaturated bond) as a constituent unit. This structural parameter change enables the resin to achieve both good adhesion to olefin resins and satisfactory abrasion resistance, resolving the contradiction between adhesion and durability.
Solution Approach 2:
The invention uses a composite polymer structure where monomer A (with ring structure) is combined with other monomers (including monomer B with acidic or amino groups). This composite material approach allows the binder resin to simultaneously provide adhesion to olefin resins through the ring structure and durability through the functional groups, resolving the contradiction between adhesion and abrasion resistance.
2Productivity
If aqueous ink composition is designed for high-speed printability and re-solubility, then ejection stability is improved, but adhesion to base materials like polyolefin plastic films deteriorates
Solution Approach 1:
The invention changes the chemical composition parameters of the binder resin by incorporating monomer A with a ring structure (such as alicyclic or heterocyclic structures). This parameter change enables the ink composition to maintain high-speed printability and re-solubility while achieving excellent adhesion to polyolefin plastic films, resolving the contradiction between productivity and adhesion reliability.
3Reliability
If surface treatment is applied to olefin resin to improve adhesion, then the adhesion of ink is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The invention extracts the surface treatment step from the manufacturing process by incorporating the adhesion-promoting functionality directly into the binder resin molecule through monomer A with ring structure. This eliminates the need for separate surface treatment processes while maintaining excellent adhesion to olefin resins, resolving the contradiction between adhesion reliability and manufacturing complexity.
Solution Approach 2:
The binder resin with monomer A provides self-adhesion capability to olefin resins without requiring external surface treatment. The ring structure of monomer A enables the resin to bond directly to the olefin resin surface, making the system self-sufficient and eliminating the need for additional surface treatment equipment and processes.
Data Source
AI summary
The present invention provides an aqueous ink composition for inkjet ejection, the aqueous ink composition having excellent adhesion to various substrates (recording media). The present invention provides an aqueous ink composition for inkjet ejection, the aqueous ink composition containing water and a resin, wherein the resin contains a polymer that contains a monomer A described below as a constituent unit. Monomer A: a monomer which has a ring structure and an ethylenically unsaturated bond