Polysiloxane-Sized Ceramic Yarn for Weaving Protection
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Solution Overview
Problem
Existing yarns with interphase coatings face damage during textile operations, lacking protection while maintaining flexibility and weaveability, and current treatments do not provide satisfactory solutions for protecting these coatings during weaving.
Innovation Solution
A yarn comprising ceramic and/or carbon fibers with an interphase coating covered by a film of straight chain polysiloxane, which provides protection during textile operations and can be easily removed after use, maintaining flexibility and weaveability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a protective treatment is applied to yarns with interphase coating, then the interphase coating is protected during textile operations, but the flexibility and weaveability of the yarn may be affected
Solution Approach 1:
The patent applies a sizing composition that forms a thin protective film on the yarn surface during textile operations. This film protects the interphase coating while maintaining yarn flexibility and weaveability, and can be easily removed after the textile operation is complete
Solution Approach 2:
The sizing composition acts as an intermediary protective layer between the interphase coating and the mechanical stresses of textile operations. This intermediate layer provides protection during processing while being removable afterward to restore the original yarn properties
2Reliability
If a protective deposit is applied to protect the interphase coating, then the coating is protected during textile operations, but the deposit may be difficult to eliminate after use
Solution Approach 1:
The sizing composition is designed with specific chemical parameters that allow it to be easily removed after textile operations. The composition can be eliminated through standard processing conditions, ensuring the protective layer serves its purpose temporarily and then can be cleanly removed without residue
3Ease of operation
If no protective treatment is applied, then the yarn maintains flexibility and weaveability, but the interphase coating is damaged during textile operations
Solution Approach 1:
The sizing composition is applied in advance before textile operations to provide protective action during the weaving or knitting process. This preliminary treatment ensures the interphase coating is protected from mechanical damage while the yarn maintains its operational properties
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 polysiloxane film effectively protects the interphase coating during textile operations, ensuring the yarn's flexibility and weaveability while allowing for easy removal, with over 90% of the film decomposing at high temperatures, thus minimizing residual deposits.
Implementation Method 1
a film covering the interphase coating comprising a straight chain polysiloxane
Implementation Method 2
when the film is subjected to a heat treatment, to obtain almost total thermal decomposition and thus to greatly limit the quantity of unwanted residual deposits
Data Source
Figure 1~3
Figure 4~6B
Figure 7
AI summary
The invention relates to : • a sized yarn (1) intended to undergo a textile operation comprising: • - a plurality of ceramic and/or carbon fibres (2), • - an interphase coating (3, 3') that covers the fibres, and • - a film (4) that covers the interphase coating comprising a linear-chain polysiloxane.