Water-Based Adhesion Composition for High-Speed Printing
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Solution Overview
Problem
Water-based inks face challenges in high press speeds due to slow drying times, necessitating modifications to printing equipment and a need for faster drying emulsions to transition from solvent inks to water-based inks effectively.
Innovation Solution
A water-based adhesion composition comprising specific polymers, surfactants, and additives that enhance adhesion and cohesion properties, allowing for improved performance on low-energy substrates and increased resistance to shear, while maintaining low VOC levels and environmental sustainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If water-based inks are used instead of solvent-based inks, then environmental benefits and low VOC levels are achieved, but drying time increases and press speed is reduced
Solution Approach 1:
The patent modifies the chemical composition parameters of water-based inks by incorporating specific polymers (acrylics, vinyls, polyurethanes), solvents (alcohols, esters, ketones), and additives to optimize evaporation rates and adhesion properties, enabling faster drying at high press speeds while maintaining low VOC levels
Solution Approach 2:
The invention creates composite ink formulations combining multiple polymer types, solvent classes, and functional additives to achieve synergistic effects that provide both rapid drying capability and strong adhesion to diverse substrates, resolving the contradiction between environmental benefits and printing productivity
2Object-affected harmful factors
If water-based inks are used instead of solvent-based inks, then environmental sustainability is improved, but adhesion performance deteriorates
Solution Approach 1:
The patent adjusts polymer molecular weights, solvent polarity, and additive concentrations to optimize the ink's interaction with substrate surfaces, achieving strong adhesion through controlled wetting, penetration, and bonding mechanisms while maintaining water-based formulation benefits
Solution Approach 2:
The invention uses coupling agents and adhesion promoters as intermediary substances that facilitate bonding between the water-based ink and substrate surfaces, bridging the compatibility gap between polar water-based formulations and various substrate materials to achieve reliable adhesion
3Object-affected harmful factors
If water-based inks are used instead of solvent-based inks, then low VOC levels are achieved, but drying speed decreases
Solution Approach 1:
The patent optimizes the volatility distribution of solvent components by selecting specific alcohol chain lengths, ester types, and ketone structures with varied evaporation rates, creating a multi-stage drying profile that accelerates overall drying time while controlling VOC emissions through water-based formulation
Solution Approach 2:
The invention employs a multi-phase drying mechanism where different solvent components evaporate at different rates, creating a sequential drying process that removes water first followed by faster-evaporating organic solvents, thereby reducing total drying time while maintaining low VOC levels
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 adhesion composition provides enhanced adhesion and cohesion, supports faster drying, and allows for the use of water-based inks in high-speed printing applications, addressing the limitations of solvent-based inks with improved stability and environmental benefits.
Implementation Method 1
a surfactant
Implementation Method 2
Heat seal adhesives are thermoplastic materials that can be coated onto a substrate, dried, and then reactivated by heat and pressure
Implementation Method 3
They are non-tacky materials at ambient temperature and become molten liquids upon heat activation during the product assembly process
Implementation Method 4
Heat seal adhesives are thermoplastic materials that can be coated onto a substrate, dried, and then reactivated by heat and pressure
Data Source
AI summary
An adhesion composition comprising a) a first polymer that is selected from the group consisting of acrylic polymers, acrylonitrile butadiene, butyl rubber, cellulose acetate, cellulose butyrate, epoxy resins, ethylene vinyl acetate, natural rubber, neoprene, phenolic polymers, polyurethanes, polyvinyl acetate, polyvinyl alcohol, styrene butadiene rubber, casein, dextrin, starch, copolymers thereof and combinations thereof; b) a second polymer selected from the group consisting of ethylene-acrylic acid copolymer, oxidized polyethylene, oxidized ethylene-vinyl acetate copolymer, maleated polyolefin and combinations thereof; and c) a surfactant; where the composition is water-based, having a solids content of greater than about 30% based on the total weight of the composition, with a particle size of about 10 nm to about 2000 nm, and is adapted for adhesion to substrates; and where the first and second polymers are different. The adhesion composition can also comprise a tackifier resin selected from the group consisting of rosin ester resin, rosin acid resin, synthetic hydrocarbon resin, synthetic terpenic resin and combinations thereof. Applications of the composition are also disclosed.