Poly Alpha Olefin Release Aids for Paper TAD Fabric Separation
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Solution Overview
Problem
There is a need for improved formulations to aid in the release of paper sheets from TAD fabrics and creping cylinders in papermaking processes, as existing solutions often result in fiber damage, uneven adhesion, and equipment wear.
Innovation Solution
A composition comprising synthetic (poly) alpha olefins and surfactants is applied to fabrics and creping cylinders to enhance release, adhesion, and lubrication, allowing for efficient separation of paper webs while reducing fiber loss and equipment wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional release formulations are used to aid separation of paper sheet from TAD fabric, then sheet release is achieved, but fiber loss occurs and fabric cleanliness deteriorates
Solution Approach 1:
The invention changes the chemical composition parameters of release formulations by substituting petroleum-based mineral oils with synthetic (poly) alpha olefins having controlled molecular weights (500-2000) and viscosities (30-70 cSt at 40°C). This parameter change improves release reliability while reducing fiber loss through optimized molecular structure and reduced contamination
Solution Approach 2:
The invention creates composite release formulations by combining synthetic (poly) alpha olefins with specific surfactants (anionic, cationic, nonionic, or amphoteric) and functional additives. This composite approach enhances both sheet release performance and fabric cleanliness while minimizing fiber loss through synergistic interactions between components
2Strength
If creping adhesive aids are used to enhance adhesion between web and dryer, then adhesion increases, but equipment wear increases
Solution Approach 1:
The invention modifies adhesive composition parameters by using synthetic (poly) alpha olefins with controlled molecular weights and viscosities instead of conventional petroleum-based oils. This provides optimal adhesion strength while reducing equipment wear through improved lubrication properties and reduced chemical corrosion
Solution Approach 2:
The invention formulates composite creping adhesive aids combining synthetic (poly) alpha olefins with surfactants and functional additives selected from the group consisting of specific compounds. This composite structure achieves enhanced adhesion while simultaneously providing lubrication between doctor blade and dryer surface, and protecting against chemical corrosion
3Manufacturing precision
If release aids are sprayed onto creping cylinder, then uniform release is achieved, but chemical corrosion increases
Solution Approach 1:
The invention changes the chemical composition of release aids by substituting conventional petroleum-based mineral oils with synthetic (poly) alpha olefins having controlled molecular weights (500-2000) and viscosities (30-70 cSt at 40°C). This provides uniform release performance while reducing chemical corrosion through improved chemical stability and reduced reactivity
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 use of (poly) alpha olefins and surfactants improves the release of paper sheets, maintains fabric cleanliness, reduces fiber loss, and extends equipment life, while providing energy savings through optimized adhesion and lubrication.
Implementation Method 1
WO 01/88031 discloses a concentrated, non-agglomerating, soluble and compatible drag reducing agent composition. It contains (a) from 1 to 60% of a polymer, e.g. non-crystalline and ultrahigh molecular weight poly-alpha-olefin, capable of reducing drag
Implementation Method 2
a release aid is sprayed onto the cylinder. These aids assist in the uniform release of the tissue sheet at the creping blade, and also lubricate and protect the blade from excessive wear
Implementation Method 3
A composition comprising synthetic (poly) alpha olefins and surfactants is applied to fabrics and creping cylinders to enhance release, adhesion, and lubrication
Data Source
AI summary
A release aid comprising one or more (poly)C5-C20 alpha olefins and one or more surfactants for use in releasing a paper web from the fabric in through air drying processes and/or from the Yankee dryer, compositions comprising the release aid and methods of using the release aid.