Methods of treating textile fibres
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Solution Overview
Problem
Current methods face difficulties in effectively bonding textiles to polymeric materials, particularly low surface energy polymers like rubbers and elastomers, and in fixing dyes onto textiles, especially aramid fibers, which are known for their impact absorption and strength but are challenging to dye or coat.
Innovation Solution
A method involving a polymeric precursor, which is coated onto textile fibers and polymerized to form a polymeric coating that promotes adhesion to polymeric materials and dyes, using specific monomers and initiators such as N,N-Diallyl-3-(propylamino)propanamide and N,N,N,N-Tetraallylethanediamide, and UV radiation for polymerization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If traditional bonding methods are used to bond textiles to polymeric materials, then the bonding process is simple, but the adhesion strength is insufficient especially with low surface energy polymers
Solution Approach 1:
The textile fibers are pre-treated with a polymeric precursor coating before bonding to the polymeric material. This preliminary coating application prepares the fiber surface to enhance subsequent adhesion, allowing strong bonding without complex multi-step surface modification processes.
Solution Approach 2:
The surface properties of the textile fibers are modified by applying a polymeric precursor that changes the surface energy and chemical composition. This parameter change enables strong adhesion to low surface energy polymers that would otherwise be difficult to bond.
2Strength
If traditional dyeing methods are used on aramid fibers, then the process is straightforward, but dye adhesion and color fastness are poor
Solution Approach 1:
A polymeric precursor coating acts as an intermediary between the aramid fiber surface and the dye molecules. This intermediate layer provides binding sites that facilitate strong dye adhesion to the otherwise difficult-to-dye aramid fibers, improving color fastness without complicating the dyeing process.
3Reliability
If polymeric precursor coating is applied to textile fibers, then adhesion to polymeric materials and dyes is enhanced, but the treatment process becomes more complex
Solution Approach 1:
The polymeric precursor coating serves multiple functions simultaneously: it acts as an adhesion promoter for polymeric materials, provides binding sites for dye molecules, and can offer protective properties. This multi-functionality achieves reliable bonding and dye fixation without requiring separate treatments for each purpose.
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 polymeric coating enhances the adhesion of textiles to polymeric materials and dyes, improving the bonding strength and color fastness, especially on aramid fibers, and allows for the formation of composite structures like reinforced rubber hoses and air cushions.
Implementation Method 1
polymerising the polymeric precursor so as to produce a polymeric coating on the textile fibres
Data Source
AI summary
According to the invention there is provided a method of treating textile fibers including the steps of: providing a polymeric precursor which includes a group of sub-formula (I) where R2 and R3 are independently selected from (CR7R8)n, or a group CR9R10, CR7R8CR9R10 or CR9R10CR7R8 where n is 0, 1 or 2, R7 and R8 are independently selected from hydrogen, halo or hydrocarbyl, and either one of R9 or R10 is hydrogen and the other is an electron withdrawing group, or R9 and R10 together form an electron withdrawing group, and R4 and R5 are independently selected from CH or CR11 where R11 is an electron withdrawing group, the dotted lines indicate the presence or absence of a bond, X1 is a group CX2X3 where the dotted line bond to which it is attached is absent and a group CX2 where the dotted line bond to which it is attached is present, Y1 is a group CY2Y3 where the dotted line bond to which it is attached is absent and a group CY2 where the dotted line bond to which it is attached is present, and X2, X3, Y2 and Y3 are independently selected from hydrogen, fluorine or other substituents, R1 is selected from hydrogen, halo, nitro, hydrocarbyl, optionally substituted or interposed with functional groups, or —R3-R5≡Y1, and R13 is C(O) or S(O)2; coating the textile fibers with the polymeric precursor; and polymerizing the polymeric precursor so as to produce a polymeric coating on the textile fibers.