Ink-jet Recording Medium Back Surface Roughness Control
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Solution Overview
Problem
Existing ink-jet recording media face issues with unevenness due to fogging resulting from adhesion of polyolefin resin and pressure application, leading to reduced anti-blocking properties during processing with a surface winding apparatus.
Innovation Solution
An ink-jet recording medium with a support having a base paper and polyolefin resin layers on both sides, and an ink-receiving layer with inorganic particles and a water-soluble resin, where the surface roughness of the support's opposite side is controlled to specific ranges (centerline average roughness Ra of 0.5 μm to 1.0 μm and surface average roughness Sra of 0.3 μm or less) to suppress adhesion and pressure-induced unevenness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a surface winding apparatus is used to process the ink-jet recording medium, then productivity is improved, but unevenness due to fogging from adhesion of polyolefin resin and pressure application occurs
Solution Approach 1:
The patent changes the surface roughness parameters of the support's back surface (Ra: 0.5-1.0 μm, Sra: 0.3 μm or less) to optimize the interaction with the surface winding apparatus, reducing adhesion and pressure-induced unevenness while maintaining high-speed processing capability
2Reliability
If the surface roughness of the support's back surface is reduced to minimize adhesion, then anti-blocking properties are improved, but the manufacturing complexity increases due to precise roughness control requirements
Solution Approach 1:
The patent specifies precise surface roughness parameters (Ra: 0.5-1.0 μm, Sra: 0.3 μm or less) for the support's back surface to achieve optimal anti-blocking properties while maintaining compatibility with standard manufacturing processes
Data Source
AI summary
An ink-jet recording medium comprising: a support including a base paper, a first polyolefin resin layer disposed on one side of the base paper, and a second polyolefin resin layer disposed on the other side of the base paper, and an ink receiving layer including inorganic particles and a water-soluble resin, the ink receiving layer being disposed on one side of the support, wherein a first surface of the support at a side that is opposite to a side at which the ink receiving layer is disposed has a centerline average roughness (Ra) of from 0.5 μm to 1.0 μm when measured in accordance with JIS-B-0601 with a cutoff value of 0.8 mm, and an average surface roughness (Sra) of 0.3 μm or less when a cutoff value is from 1 μm to 25 μm.