Composite Blind Slat Production via Pulp Fiber Impregnation
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Solution Overview
Problem
Existing Venetian blind slats, whether made of metal or PVC, face issues of being heavy, inconvenient, and lacking environmental friendliness, with PVC slats being prohibited due to non-biodegradability and recycled fly ash slats not being widely accepted.
Innovation Solution
A method and apparatus for producing composite blind slats using a pulp fiber web impregnated with a styrene-octyl acrylate copolymer and water, followed by thermal forming to create lightweight, arcuated slats that are environmentally friendly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal plates are used to make blind slats, then strength and durability are improved, but weight increases and thermal insulation deteriorates
Solution Approach 1:
The patent uses composite materials consisting of recycled fly ash particles bound with binder materials to create blind slats that combine the strength of metal with the lightness of non-metallic materials. This composite structure resolves the contradiction by achieving adequate strength while maintaining low weight.
Solution Approach 2:
The patent changes the material parameters by using porous or cellular structures within the composite material, reducing density and weight while maintaining structural integrity through optimized material composition and internal architecture.
2Weight of moving object
If PVC is used to make blind slats, then weight is reduced and ease of operation is improved, but environmental friendliness deteriorates
Solution Approach 1:
The patent recovers and reuses recycled fly ash, a waste material from power plant emissions, transforming it into useful blind slat products. This eliminates the need for PVC while achieving light weight and environmental friendliness simultaneously by giving new life to industrial waste.
Solution Approach 2:
The patent uses readily available recycled materials that can be easily processed and disposed of or recycled again, replacing persistent PVC materials with environmentally benign alternatives that have minimal ecological impact.
3Object-affected harmful factors
If recycled fly ash is used to make blind slats, then environmental friendliness is improved, but weight increases and ease of operation deteriorates
Solution Approach 1:
The patent creates composite materials with optimized density by combining fly ash with lighter binder materials and incorporating air voids or cellular structures, achieving the light weight needed for easy operation while maintaining environmental friendliness through recycled content.
Solution Approach 2:
The patent applies different material compositions and densities in different regions of the blind slat structure, optimizing weight distribution to achieve both environmental friendliness and ease of handling through strategic material placement.
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 solution results in lightweight, moisture-resistant, and easily handled blind slats that are environmentally friendly, with the option to add UV radiation-resisting or flame-retarding agents for enhanced durability and safety.
Implementation Method 1
an impregnation tank disposed downstream of the feeding unit and containing an impregnating liquid for impregnating the pulp fiber web
Implementation Method 2
a thermal forming unit disposed downstream of the impregnation tank for thermal forming the pulp fiber web that has been impregnated
Data Source
AI summary
An apparatus for making blind slats includes: a feeding unit adapted to feed a pulp fiber web; an impregnation tank containing an impregnating liquid for impregnating the pulp fiber web; a conveying roller assembly disposed within said impregnation tank for immersing and conveying the pulp fiber web through the impregnating liquid; and a thermal forming unit for thermal forming the pulp fiber web that has been impregnated.