Guide Roller Deposit Prevention in Superabsorbent Yarn Coating
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Solution Overview
Problem
Existing methods for applying superabsorbent materials to yarn require additional process steps like drying and heating, and result in deposit formation on guide rollers, leading to high costs and operational inefficiencies.
Innovation Solution
A method using a water-in-oil emulsion with at least 70 wt% of hydrocarbons having 20 to 32 carbon atoms, allowing direct application onto yarn without drying or heating, and minimizing deposit formation by using a stable water-in-oil emulsion that inverts to an oil-in-water emulsion upon contact with water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a water-in-oil emulsion containing high amounts of water (25-40 wt%) is used to apply superabsorbent material onto yarn, then the superabsorbent material can be effectively applied, but additional drying steps are required which increase process complexity and cost
Solution Approach 1:
The invention changes the water content parameter of the emulsion from the conventional 25-40 wt% to less than 10 wt% (preferably 1-5 wt%). This parameter change eliminates the need for drying steps while maintaining effective superabsorbent material application, thereby resolving the contradiction between reliable material application and process complexity
Solution Approach 2:
The invention applies local quality by using different hydrocarbon chain lengths (C20-C32) in the oil phase to achieve specific emulsion properties. The use of higher carbon number hydrocarbons creates a more stable emulsion with lower water content that does not require drying, addressing the contradiction by optimizing the local composition of the emulsion system
2Device complexity
If emulsions with low water content are used to avoid drying steps, then process complexity is reduced, but deposits form quickly on guide rollers causing process interruptions
Solution Approach 1:
The invention changes the hydrocarbon chain length parameter to C20-C32 (preferably C24-C28) which provides optimal balance between emulsion stability and guide roller compatibility. This parameter change reduces deposit formation on guide rollers while maintaining low water content, thus resolving the contradiction between process simplicity and production continuity
Solution Approach 2:
The invention uses a composite emulsion system combining superabsorbent material with a specific hydrocarbon mixture (C20-C32) and optional co-solvents. This composite formulation maintains emulsion stability at low water content while minimizing deposits on guide rollers, resolving the contradiction between process simplicity and production continuity
3Ease of operation
If esteroil lubricants are used as dispersing medium for superabsorbent material, then application simplicity is improved, but health risks and deposit formation increase
Solution Approach 1:
The invention replaces esteroil lubricants with saturated hydrocarbons (C20-C32) which are more stable and less prone to degradation. This substitution eliminates health risks associated with esteroil while maintaining application simplicity and reducing deposit formation, resolving the contradiction between ease of operation and harmful factors
Solution Approach 2:
The invention changes the chemical composition parameter from esteroil lubricants to saturated hydrocarbons with 20-32 carbon atoms. This parameter change provides a more stable dispersing medium that is safer for operators and produces fewer deposits on guide rollers, while maintaining simple application procedures
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
Enables high-speed production without additional process steps and significantly reduces deposit formation on guide rollers, allowing extended production run times and maintaining the yarn's water-blocking properties.
Implementation Method 1
applying to the surface of the yarn a layer of a water-in-oil emulsion which contains the superabsorbent material in its aqueous phase
Implementation Method 2
the oil is a mixture comprising saturated aliphatic hydrocarbons... at least 70 wt% of the hydrocarbons have 20 to 32 carbon atoms
Data Source
AI summary
The invention relates to a method for preventing or reducing deposit forming of superabsorbent material and/or oil onto guide rollers during the process of applying a superabsorbent water-in-oil emulsion onto a yarn wherein the oil is a mixture comprising saturated hydrocarbons, characterized in that the at least 70 wt% of the hydrocarbons have 20 to 32 carbon atoms.