Activated Carbon Fibre Sheets for Protective Gear
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Solution Overview
Problem
The production of activated carbon fibre sheetlike structures is limited by the size of carbonizing and activating kilns, resulting in significant material waste due to shrinkage, leading to poor making-up utilization rates of less than 60% when processed into protective materials.
Innovation Solution
A textile sheetlike structure composed of a textile support layer with laminated activated carbon fibre pieces that touch or overlap, allowing for the creation of seamless, infinitely adjustable width activated carbon fibre layers, significantly increasing the making-up utilization rate to above 90%.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If activated carbon fibre sheetlike structures are produced in conventional kilns with limited dimensions, then the production process is feasible, but the making-up utilization rate is poor (less than 60%) due to shrinkage and material waste
Solution Approach 1:
The invention divides the large activated carbon fibre sheet into multiple smaller sheetlike pieces that can be processed in conventional kilns. These segmented pieces are then joined together to form the desired large structure, allowing conventional equipment to produce components for large-scale applications without requiring oversized kilns.
Solution Approach 2:
The invention combines multiple activated carbon fibre sheetlike pieces into a unified large-scale structure through joining processes. This merging approach enables the production of large protective materials with high making-up utilization rates by assembling pre-formed segments into final configurations that minimize waste.
2Loss of substance
If the width of activated carbon fibre sheets is increased to reduce material waste, then making-up utilization improves, but the kiln or furnace dimensions required become impractically large
Solution Approach 1:
Instead of producing one large wide sheet in a single kiln, the invention segments the production into multiple narrower sheets that fit within conventional kiln dimensions. These segments are subsequently assembled to create the equivalent of a large wide structure, achieving high material utilization without requiring oversized processing equipment.
Solution Approach 2:
The invention transitions from a single-dimension approach (producing one large sheet) to a multi-dimensional approach (assembling multiple smaller sheets in space). By utilizing the assembly dimension, the system achieves large effective width through combination rather than requiring a single large processing chamber.
3Productivity
If carbonization and activation processes are applied to textile starting materials, then activated carbon fibres are produced, but significant shrinkage occurs resulting in poor making-up utilization
Solution Approach 1:
The invention applies carbonization and activation treatments to smaller textile pieces before final assembly, rather than treating a large continuous sheet. This preliminary processing of segmented materials allows for better control of shrinkage in each piece, and the subsequent assembly accommodates the shrunk dimensions to achieve high overall utilization.
Solution Approach 2:
The invention changes the processing parameters by treating multiple small pieces separately through carbonization and activation, then assembling them after shrinkage occurs. This parameter change in the processing sequence allows the system to work with the shrunk dimensions of individual pieces rather than attempting to prevent shrinkage in a large continuous structure.
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 enables the production of activated carbon fibre sheetlike structures of any desired width, reducing material waste and enhancing the efficiency of processing into protective materials, such as suits and gloves, with improved mechanical stability and adsorption efficiency.
Implementation Method 1
Activated carbon has fairly unsspecific adsorptive properties and for this reason is the most widely used adsorbent
Implementation Method 2
two sheetlike pieces of activated carbon fibres are laminated such that edges of the two activated carbon fibre sheetlike pieces touch and/or overlap
Data Source
AI summary
The present invention relates to a textile sheetlike structure (1), in particular for protection against biological and chemical noxiants and poisons, such as biological and chemical warfare agents. The sheetlike structure (1) having a textile support layer (2) and a first sheetlike piece (3) of activated carbon fibers which is laminated onto the support layer (2), wherein the sheetlike structure (1) further comprises a second sheetlike piece (4) of activated carbon fibers which is laminated onto the support layer (2) such that edges of the two sheetlike pieces (3, 4) touch and/or overlap and wherein the two sheetlike pieces (3, 4) are joined together by the support layer (2). This provides a seamless joining together of two or more sheetlike pieces to form a continuous sheetlike structure of activated carbon fibers to provide an improved material for use in the production of protective articles.