Vinyl Chloride Gel Layer Ink Absorption
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Solution Overview
Problem
Existing inkjet printing methods face challenges in achieving high-quality image printing on soft vinyl chloride wallpapers due to poor ink absorptivity, leading to complex production processes and increased costs, despite attempts to use ink receiving layers.
Innovation Solution
An ink application method employing an inkjet system that uses an oil-based ink with a gel layer containing vinyl chloride resin and plasticizer, where the gel layer's properties are optimized for high ink absorptivity through specific spin-spin relaxation times, eliminating the need for special base treatments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ink receiving layer is provided on the resin layer to improve ink absorptivity, then ink absorptivity is improved, but the production process becomes more complicated and production cost increases
Solution Approach 1:
The patent extracts and removes the ink receiving layer from the wallpaper structure, achieving high ink absorptivity through the resin layer itself by optimizing plasticizer content and using appropriate ink formulations, thereby simplifying the production process while maintaining reliable ink absorption
Solution Approach 2:
The patent introduces a primer coat as an intermediary layer between the resin layer and the inkjet-printed image, which improves ink absorptivity and image fixation without requiring a separate ink receiving layer, thus reducing production complexity while maintaining reliability
2Manufacturing precision
If oil-based ink is used to achieve high-density images, then image density is improved, but ink permeability to the resin layer is poor
Solution Approach 1:
The patent changes the chemical and physical parameters of the resin layer by optimizing plasticizer content (30-70 parts by mass per 100 parts of polyvinyl chloride resin) and using specific resin compositions, which improves ink permeability while maintaining high image density when used with oil-based inks
Solution Approach 2:
The patent creates a composite resin layer structure combining polyvinyl chloride resin with specific plasticizers and optional additives, which provides both the permeability needed for oil-based ink absorption and the stability required for high-density image formation
3Adaptability or versatility
If soft vinyl chloride is used for wallpaper to maintain flexibility, then flexibility is improved, but ink absorptivity deteriorates
Solution Approach 1:
The patent optimizes the plasticizer content parameter within a specific range (30-70 parts by mass per 100 parts of resin) to achieve the right balance between flexibility and ink absorptivity, allowing soft vinyl chloride to maintain both properties simultaneously
Solution Approach 2:
The patent develops a composite resin composition that combines polyvinyl chloride resin with specific plasticizers and optional functional additives, creating a material that inherently provides both flexibility and improved ink absorptivity without requiring separate treatment layers
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
This method enables high-quality image printing on soft vinyl chloride wallpapers with improved ink absorptivity and image density, simplifying the production process while maintaining image integrity and coverage.
Implementation Method 1
When a free induction decay curve of the object obtained by a pulse NMR method is separated into two curves respectively derived from a hard component and a soft component
Implementation Method 2
the curve derived from the soft component has a spin-spin relaxation time of from 30.0 to 45.0 ms when obtained by a Hahn echo method
Data Source
AI summary
An ink application method is provided. In the method, an ink is discharged to an object by an inkjet method, to apply the ink to the object. The object includes a base material and a gel layer overlying the base material, and the gel layer includes a vinyl chloride resin and a plasticizer. The ink is an oil-based ink. When a free induction decay curve of the object obtained by a pulse NMR method is separated into two curves respectively derived from a hard component and a soft component, the curve derived from the hard component accounts for 35% to 40% of the free induction decay curve, and the curve derived from the soft component has a spin-spin relaxation time of from 30.0 to 45.0 ms when obtained by a Hahn echo method.