Interpenetrating Polymer Network for Paper Drainage and Strength
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Solution Overview
Problem
The paper industry faces challenges in achieving improved paper and paperboard quality, increased process speeds, and reduced manufacturing costs, as existing chemicals often specialize in either strength or drainage properties, lacking a material that simultaneously enhances both.
Innovation Solution
An interpenetrating polymer network (IPN) material is produced by combining a copolymer of vinylamine-vinylformamide with a homopolymer or copolymer of acrylamide or acrylic acid derivatives, allowing for simultaneous improvement of drainage and strength properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If synthetic chemicals are tailored for one purpose (e.g., strength or drainage), then that specific property is improved, but the ability to simultaneously achieve multiple properties (drainage and strength) is limited
Solution Approach 1:
The patent combines multiple polymer components (polyacrylamide, polyvinylformamide, and optionally polyacrylic acid) into a single integrated chemical substance that simultaneously provides drainage and strength properties. This merging of functions into one material allows the papermaking process to achieve both drainage improvement and strength enhancement without using separate specialized chemicals for each function.
Solution Approach 2:
The synthesized chemical substance is designed to perform multiple functions simultaneously: it acts as both a drainage additive and a strength additive. The patent explicitly states that the invention provides a 'universal' chemical substance that can improve both drainage rate and paper strength, eliminating the need for separate specialized chemicals for each function.
2Adaptability or versatility
If multiple separate chemicals are used to achieve drainage and strength properties, then both properties can be improved, but the complexity of the chemical system and manufacturing process increases
Solution Approach 1:
The patent merges the functions of multiple separate chemicals (drainage additives and strength additives) into a single synthesized chemical substance. This consolidation simplifies the chemical system by reducing the number of separate compounds that need to be handled, stored, and dosed, while maintaining the ability to improve both drainage and strength properties.
Solution Approach 2:
The invention creates a universal chemical substance that performs multiple functions simultaneously. By designing a single substance with both drainage and strength properties, the patent reduces the complexity of managing multiple specialized chemicals, making the overall system simpler while achieving the same or better performance.
3Strength
If conventional chemicals are used for drainage and strength, then these properties are improved, but manufacturing costs may increase due to using multiple specialized chemicals
Solution Approach 1:
The patent combines the functions of multiple chemicals into one synthesized substance, which can reduce manufacturing costs by eliminating the need to purchase, store, and manage separate drainage and strength chemicals. The single substance approach simplifies logistics and reduces the overall chemical budget while maintaining effective performance.
Solution Approach 2:
The universal chemical substance designed in the patent replaces multiple specialized chemicals, potentially reducing manufacturing costs through consolidated purchasing and simplified process management. The ability to achieve both drainage and strength improvement from a single substance can lead to cost savings compared to using separate optimized chemicals for each function.
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 IPN material effectively enhances drainage and strength properties, offering better performance compared to conventional blended polymers, while being easily producible and versatile in application.
Implementation Method 1
An interpenetrating polymer network (IPN) material is produced by combining a copolymer of vinylamine-vinylformamide with a homopolymer or copolymer of acrylamide or acrylic acid derivatives
Implementation Method 2
polymerized or polymerized and cross-linked in the immediate presence of the copolymer of vinylamine-vinylformamide (in situ) to form the IPN material
Implementation Method 3
The IPN material of the present invention improves drainage time, strength and fixing
Implementation Method 4
By using cationic starch or PAM, negatively charged fibers can bind with the cationic starch or PAM and thus increase interconnections between the fibers, and thus strength
Data Source
AI summary
The present invention relates to an interpenetrating polymer network (IPN) material comprising a copolymer of vinylamine-vinylformamide, and a homo-polymer or a copolymer of at least one monomer selected from acrylamide or derivatives thereof, acrylic acid or derivatives thereof, or a mixture thereof forming the IPN material together with the copolymer of vinylamine-vinyl-formamide. The present invention further relates to a process for producing the IPN material, and to use of the IPN material in paper industry.