Paper Base Laminate Ink Storage Member Reducing Plastic Waste
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Solution Overview
Problem
The environmental impact of plastic ink storage tubes in writing tools is a concern due to microplastic pollution, and existing alternatives using biodegradable resins and paper base materials do not fully address the reduction of plastic consumption and pollution.
Innovation Solution
A liquid storage member for coating tools is developed using a paper base laminate with a metal or silica deposition layer, spirally wound to reduce plastic usage, featuring an inner layer of dense paper materials like glassine or parchment paper, and an outer layer of paper base material, ensuring water and oil resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If plastic materials (polypropylene) are used for ink storage tubes, then shaping ease and visibility of ink amount are improved, but environmental pollution from microplastics increases
Solution Approach 1:
The invention changes the fundamental material parameter from plastic to paper base material, eliminating microplastic pollution while maintaining manufacturing feasibility through spiral winding of laminated composite material
Solution Approach 2:
The invention uses a composite material structure with paper base material as the core, combined with barrier layers (synthetic resins or metals like aluminum) to achieve both environmental friendliness and functional performance for ink storage
2Object-generated harmful factors
If paper base material is used for shaft pipe, then environmental pollution is reduced, but water resistance and gas barrier properties must be improved
Solution Approach 1:
The invention creates a multi-layer composite structure where paper base material is combined with barrier layers (synthetic resins or metal foils like aluminum) to simultaneously achieve environmental friendliness and adequate water/gas barrier properties
Solution Approach 2:
The invention uses a laminated composite structure where the paper base material is nested with barrier layers, with the paper providing structural integrity and the barrier layers providing protection against water and gas penetration
3Object-generated harmful factors
If biodegradable resin is used for storage tube base, then biodegradation and waste reduction are improved, but swelling and dimensional change with water-based ink must be prevented
Solution Approach 1:
The invention changes the material parameter from biodegradable resin to paper base material with density of 0.8 g/cm³ or more, which provides both biodegradability and dimensional stability when in contact with water-based ink
Solution Approach 2:
The invention specifies that the inner layer paper base material must have a density of 0.8 g/cm³ or more to resist water-based ink, while allowing the overall structure to be biodegradable
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 solution effectively reduces plastic consumption and environmental loads by using paper-based materials, providing a durable and water-resistant ink storage solution for writing tools while minimizing waste and pollution.
Implementation Method 1
a middle layer which is a metal layer or a silica deposition layer, formed on the outer peripheral side of the inner layer
Data Source
AI summary
Provided is a liquid storage member for coating tools which successfully reduces plastic consumption and reduces environmental loads, by making use of materials based on paper in place of plastics such as polypropylene that has been used for liquid (e.g., ink) storage members. A liquid storage member for coating tools having at least three layers of a paper base laminate composed of an inner layer made of paper base material, and a middle layer of a metal layer or a silica deposition layer, formed on the outer peripheral side of the inner layer; and an outer layer made of the paper base material formed on the outer peripheral side of the middle layer, wherein the paper base material of the inner layer has a density of 0.8 g/cm3 or more.