PAE-Free Creping Adhesive Composition for Dryer Adhesion Control
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Solution Overview
Problem
The increasing use of recycled paper materials and advancements in creping dryers have necessitated the development of alternative creping adhesives that are free from polyamidoamine-epihalohydrin (PAE) and polyethyleneimine (PEI) to maintain efficient paper-making processes and improve adhesive film properties.
Innovation Solution
A creping adhesive composition comprising a polyacrylamide or polyamine polymer, a polyvinylamine film modifier, and a plasticizer with two or more —OH groups, formulated without PAE and PEI, is used to control adhesion between fibrous webs and creping dryers, enhancing paper performance and adhesive film properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional creping adhesives including PAE and PEI are used, then adhesion control between fibrous webs and creping dryers is achieved, but operational issues arise and equipment wear increases
Solution Approach 1:
The patent changes the chemical parameters of the adhesive by using polyacrylamide and polyamine polymers instead of conventional PAE and PEI adhesives. This substitution maintains adhesion control functionality while reducing equipment wear and operational issues through different chemical properties and mechanisms of action.
Solution Approach 2:
The invention creates a composite adhesive system combining polyacrylamide polymer, polyamine polymer, and polyvinylamine film modifier in specific proportions. This composite formulation achieves superior adhesion control and reduced equipment wear compared to single-component conventional adhesives.
2Quantity of substance
If recycled paper materials are used, then production costs are reduced, but adhesion control and paper performance become more difficult to maintain
Solution Approach 1:
The adhesive composition is formulated with specific polymer types and ratios (polyacrylamide, polyamine, polyvinylamine) that are particularly effective for recycled paper materials. The chemical parameters of the adhesive are optimized to accommodate the variable properties of recycled fibers, ensuring consistent adhesion control regardless of paper source.
3Adaptability or versatility
If adhesive film properties are customized, then paper performance is enhanced, but formulation complexity increases
Solution Approach 1:
The patent enables customization of adhesive film properties by adjusting the proportions of polyacrylamide polymer, polyamine polymer, and polyvinylamine film modifier within specified ranges. Key properties such as dry tackiness, wet tackiness, and softness can be tailored by varying these compositional parameters without requiring complex multi-component systems.
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 composition provides effective adhesion control, improves paper strength and flexibility, and reduces equipment wear, while avoiding the operational issues associated with conventional adhesives.
Implementation Method 1
control adhesion between fibrous webs of paper products and the surface of the creping dryer
Implementation Method 2
a plasticizer including a compound having two or more —OH groups
Data Source
AI summary
A creping adhesive composition includes an adhesive polymer chosen from a polyacrylamide, a specific polyamine, and combinations thereof that is present in an amount of from about 1 to about 45 wt % actives, based on a total weight of the composition; a film modifier including a polyvinylamine that is present in an amount of from about 0.1 to about 40 wt % actives, based on a total weight of the composition; and a plasticizer including a compound having two or more —OH groups that is present in an amount of from about 0.1 to about 40 wt % actives, based on a total weight of the composition; wherein the composition is free of polyamidoamine-epihalohydrin (PAE) and polyethyleneimine (PEI).