Methods of forming paper products and paper products formed through the methods
By adding a glyoxalated polyvinylamide adduct to the diluted aqueous suspension post-high shear operation, the method improves dry strength in paper products while minimizing additive use, addressing the inefficiencies of conventional methods.
WO2026055418A1 Publication Date: 2026-03-12SOLENIS TECHNOLOGIES CAYMAN LP +1
7 Cites 0 Cited by
Patent Information
- Application Number
- PCT/US2025/045013
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-09-06
- Filing Date
- 2025-09-05
- Publication Date
- 2026-03-12
AI Technical Summary
Technical Problem
Existing papermaking processes using glyoxalated polyvinylamides as dry strength additives do not maximize dry strength, and these additives are expensive with limited shelf life, necessitating a more efficient method to enhance dry strength while minimizing their use.
Method used
Adding an aqueous composition comprising a glyoxalated polyvinylamide adduct to the diluted aqueous suspension after the last high shear operation and before the headbox, avoiding further high shear operations, to maximize dry strength and reduce additive usage.
Benefits of technology
The method achieves comparable or greater dry strength in paper products with reduced glyoxalated polyvinylamide usage, enhancing process efficiency and flexibility in additive addition points.
✦ Generated by Eureka AI based on patent content.
Abstract
Methods of forming paper products are provided herein. A method comprises providing an aqueous suspension of cellulosic fibers; diluting the aqueous suspension with water to form a diluted aqueous suspension having a solids content from about 0.3 wt% to about 1.8 wt%, based on a total weight of the diluted aqueous suspension; subjecting the diluted aqueous suspension to a high shear operation; adding an aqueous composition comprising an adduct formed from the reaction of glyoxal and a polyvinylamide prepolymer to the diluted aqueous suspension; forming the diluted aqueous suspension into a sheet; and drying the sheet. The aqueous composition is added after the diluted aqueous suspension is subjected to the high shear operation and before the diluted aqueous suspension is passed to a headbox. The method is free of any high shear operation after the aqueous composition is added and before the diluted aqueous suspension is passed to the headbox.
Need to check novelty before this filing date? Find Prior Art