Sand-Effect Paper Material with Inorganic Filler Coating
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Solution Overview
Problem
Traditional paper materials lack a unique feel and often compromise print quality to achieve specific appearances or finishes, such as those required for wrapping or quality printing.
Innovation Solution
A sand-effect paper material is created using a pulp mixture of cellulose fibers and inorganic fillers, combined with a surface treatment involving a polymeric substance and glossy coating, which mimics the feel of sand while ensuring high printing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional paper materials are used to achieve specific appearances or finishes, then the appearance effect is improved, but the print quality deteriorates
Solution Approach 1:
The paper structure is segmented into multiple functional layers: a base layer providing structural support and a separate surface layer containing the inorganic filler particles that create the sand-like effect. This segmentation allows the surface appearance to be optimized independently from the bulk properties that affect print quality.
Solution Approach 2:
The invention uses composite materials combining organic cellulose fibers with inorganic fillers (such as calcium carbonate, silica, or talc) in specific ratios and configurations. This composite structure provides both the desired sand-like tactile effect and maintains sufficient surface smoothness for high-quality printing.
2Ease of operation
If a sand-like feel is created on the paper surface, then the tactile effect is improved, but the surface smoothness deteriorates
Solution Approach 1:
The inorganic filler particles are distributed in a controlled manner to create localized sand-like tactile zones while maintaining overall surface smoothness. The particle size, shape, and distribution are carefully regulated so that the tactile effect is perceptible but does not prevent ink application or printing.
Solution Approach 2:
The invention optimizes multiple parameters simultaneously: inorganic filler particle size (0.1-10 micrometers), concentration (5-50% by weight), and surface treatment to achieve the right balance between tactile effect and surface smoothness. These parameter adjustments allow the surface to feel like sand while remaining printable.
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 sand-effect paper material achieves a unique tactile experience similar to sand while maintaining high printability and enabling difficult graphic effects, surpassing traditional coated papers.
Implementation Method 1
an inorganic filler, capable of bestowing on the material good characteristics of machinability
Implementation Method 2
at least one polymeric substance, capable of bestowing (dry and wet) strength on the mixture of fibres
Implementation Method 3
The substrate has at least one surface (face) treated with at least one surface adhesive and a glossy coating having particular components so that the paper material, owing to the combined effect of the composition of the substrate and of the surface treatment, presents a feel similar to that of sand
Data Source
AI summary
A sand-effect paper material comprises a substrate, formed by a mixture of cellulose fibres and containing at least one polymeric substance (comprising, for example, one or more colophony-based and/or alkyl-ketene-dimer-based and/or epichlorohydrin-based resins, and/or modified starches, etc.), apt to bestow strength on the mixture of fibres, and an inorganic filler (for example, a mineral filler of a carbonate type, kaolin, talc, etc.); the paper material has at least one surface treated with at least one surface adhesive and provided with a glossy coating formed by one or more binding polymers and/or waxes, mixed with pigments, so that the paper material has a sand-like feel.