Shaped Paper Surface Coating for Flatness and Watertightness
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Solution Overview
Problem
Conventional wet-fiber molded paper processes for producing shaped-paper products face issues such as fiber scraps leading to dust, ink halo or penetration during printing, poor surface flatness, and watertightness, which disrupt automated production efficiency and product quality.
Innovation Solution
A method involving a continuous production process with a surface-coating apparatus that applies a binding layer using liquid coating materials, such as hydrofluoroether and styrene-acrylate copolymer, to the shaped-paper products, ensuring even distribution and enhancing surface flatness, watertightness, and abrasion resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If wet-fiber molded paper process is used to produce shaped-paper products, then production capability is achieved, but fiber scraps fall off surfaces causing dust and environmental issues
Solution Approach 1:
The harmful fiber scraps are extracted and removed from the substrate surface through the coating process, where the coating material binds the loose fibers and allows them to be eliminated, solving the dust and environmental problem while maintaining production capability
Solution Approach 2:
A composite structure is created by applying a coating layer onto the fiber-based substrate, combining the substrate material with coating material to form a new composite that eliminates fiber scraps while preserving the shaped-paper product's functional properties
2Ease of manufacture
If wet-fiber molded paper process is used, then substrate production is achieved, but surface flatness is poor and aesthetic appearance deteriorates
Solution Approach 1:
The surface parameters of the substrate are changed by applying a coating layer that modifies the surface topology, transforming the uneven fiber surface into a flat, smooth surface that meets aesthetic requirements while keeping the manufacturing process simple
3Ease of manufacture
If manual surface coating is performed, then substrate treatment is achieved, but production efficiency decreases and coated layer uniformity deteriorates
Solution Approach 1:
The manual mechanical coating process is replaced with an automated coating system that applies coating material uniformly onto the substrate surface, eliminating manual labor while ensuring consistent coated layer quality and大幅提高 production efficiency
Solution Approach 2:
The coating system is designed to automatically complete the surface treatment process without manual intervention, where the system itself performs the coating application, drying, and quality assurance functions, achieving both high efficiency and uniformity
4Ease of manufacture
If manual surface coating is performed, then substrate treatment is achieved, but coated layer uniformity deteriorates and product quality decreases
Solution Approach 1:
Manual coating operations are replaced with an automated coating apparatus that precisely controls coating material application, ensuring uniform distribution and consistent thickness across the entire substrate surface, thereby guaranteeing product quality
5Ease of manufacture
If ink jetting is performed on fibered substrate, then printing is achieved, but ink halo and penetration occur causing printing distortion
Solution Approach 1:
A coating layer is introduced as an intermediary between the substrate and the ink, creating a barrier that prevents ink from penetrating into the fiber structure and causing halo effects, thereby ensuring sharp, distortion-free printing while maintaining the printing process's simplicity
6Ease of manufacture
If substrate surface is left untreated, then production simplicity is maintained, but watertightness is poor and functional requirements are not met
Solution Approach 1:
A composite structure is formed by applying a coating layer onto the substrate, creating a multi-layer material system where the coating provides watertightness while the substrate maintains its structural properties, achieving functional requirements without complicating the production process
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 method significantly reduces fiber scraps and dust, prevents printing distortions, and enhances the aesthetic and functional properties of shaped-paper products, improving production efficiency and yield while ensuring higher quality and environmental compliance.
Implementation Method 1
a surface-coating apparatus that applies a binding layer using liquid coating materials, such as hydrofluoroether and styrene-acrylate copolymer, to the shaped-paper products, ensuring even distribution
Implementation Method 2
applies a binding layer using liquid coating materials... to the shaped-paper products, ensuring even distribution and enhancing surface flatness, watertightness, and abrasion resistance
Data Source
AI summary
A method for fabricating shaped-paper products is introduced herein, which comprises at least one dredging-pulp step for forming a wet pulp made of paper-slurry materials, at least one pre-compression step for lightly compressing the wet pulp to form a first semi-finished product, at least one thermo-compression forming step for deeply compressing the first semi-finished product to form a second semi-finished product, and a surface-coating step of employing a product surface coating apparatus to coat a liquid coating materials onto at least one outer surface of the second semi-finished product, and thereby forming each of the shaped-paper products having a binding layer. With utilization of the present invention, an automatic coating can be applied high efficiently in a series of continuous production machines. This could not only shorten processing time and benefit a mass production thereof but also ensure a higher production yield and quality.