Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for preparing high-strength regenerated fiber paper through solution membrane casting method

A recycled fiber and high-strength technology, applied in the direction of textiles and papermaking, can solve the problems of insufficient use effect, insufficient tensile index, tear index and folding endurance of recycled fiber paper, and achieve novel design and application Good effect and reasonable process

Pending Publication Date: 2021-11-16
LIUPANSHUI NORMAL UNIV
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods all use the traditional wet papermaking technology to prepare high-strength paper. The tensile index, tear index, burst index and folding endurance of the recycled fiber paper are not high enough, and the promotion has certain limitations. , the use effect is also slightly insufficient

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for preparing high-strength regenerated fiber paper through solution membrane casting method
  • Method for preparing high-strength regenerated fiber paper through solution membrane casting method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A method of preparing high-strength regenerated fiber paper by solution casting method of the present invention is as follows:

[0044] (1) commercially available unbleached eucalyptus pulp board fiber is broken into 1-3cm shredded paper;

[0045] (2) Add the shredded paper scraps described in the above step (1) to the 7% sodium hydroxide / 12% urea aqueous solution that has been pre-cooled to -13°C at a solid-to-liquid ratio of 1:25, and mechanically stir at 1500 rpm for 5 minutes;

[0046](3) Pour the heterogeneous mixed viscous solution obtained in the above step (2) into a polytetrafluoroethylene mold, spread it flat with a wire rod, defoam, put it in a blast drying oven at 60°C to remove the solvent, and solidify;

[0047] (4) Put the solid obtained in the above step (3) into a 20°C, 5% sulfuric acid / 5% sodium sulfate aqueous solution at 20°C with a solid-to-liquid ratio (g:ml) of 1:20, and let it stand for 5 minutes to reconstruct the hydrogen bond network , demoul...

Embodiment 2

[0050] A method of preparing high-strength regenerated fiber paper by solution casting method of the present invention is as follows:

[0051] (1) commercially available unbleached eucalyptus pulp board fiber is broken into 1-3cm shredded paper;

[0052] (2) Add the shredded paper scraps described in the above step (1) to the 7% sodium hydroxide / 12% urea aqueous solution that has been pre-cooled to -13°C at a solid-to-liquid ratio of 1:25, and mechanically stir at 20,000 rpm for 10 minutes;

[0053] (3) Pour the heterogeneous mixed viscous solution obtained in the above step (2) into a polytetrafluoroethylene mould, pave it with a wire rod, defoam, leave it at room temperature for 24 hours to remove the solvent, and solidify;

[0054] (4) Put the solid matter obtained in the above step (3) into room temperature and 5% sulfuric acid / 5% sodium sulfate aqueous solution with a solid-to-liquid ratio (g:ml) of 1:15 to 1:50 and let it stand for 5 minutes to carry out hydrogen bond ne...

Embodiment 3

[0057] A method of preparing high-strength regenerated fiber paper by solution casting method of the present invention is as follows:

[0058] (1) Commercially available unbleached eucalyptus pulp board fibers and commercially available unbleached Simao pine pulp board fibers are broken into 1-3cm shredded paper, and mixed uniformly with a mass ratio of 88:12;

[0059] (2) Add the mixed shredded paper scraps described in the above step (1) to the 7% sodium hydroxide / 12% urea aqueous solution that has been pre-cooled to -13°C at a solid-to-liquid ratio of 1:25, and mechanically stir at 2500rpm for 5min;

[0060] (3) Pour the heterogeneous mixed viscous solution obtained in the above step (2) into a polytetrafluoroethylene mold, spread it flat with a wire rod, defoam, and place it in a blast drying oven at 60°C for 4 hours to remove the solvent and solidify;

[0061] (4) Put the solid matter obtained in the above step (3) into room temperature and 7% ammonium sulfate aqueous sol...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

According to a method for preparing the high-strength regenerated fiber paper through a solution membrane casting method, plant fibers are smashed through a smashing machine and then mixed and stirred with a low-temperature sodium hydroxide / urea solution according to a certain proportion, then a mixed viscous solution is poured into a mold to be subjected to solution membrane casting, the obtained solid matter is put into a 2%-30% regeneration solution at the temperature of 20-50 DEG C, standing is conducted for 5-15 min, and hydrogen bond network reconstruction and demoulding and static solidification are carried out; and the tensile index, the tearing index, the burst index and the folding strength of the high-strength regenerated fiber paper prepared through the cellulose dissolving and regenerating series process are improved by 680%, 1212%, 260% and 2450% at most respectively compared with paper sheets prepared through a paper pulp soaking deionized water wet-process papermaking process, and are improved by 164%, 517%, 260% and 1600% at most compared with the paper pulp prepared by adopting a low-temperature sodium hydroxide / urea solution treatment, dissolved cellulose regeneration and wet-process papermaking process. The design is novel, the process is reasonable, and the application effect is good.

Description

technical field [0001] The invention relates to the field of special paper processing, in particular to a method for preparing high-strength regenerated fiber paper by a solution casting method. Background technique [0002] When the wet papermaking process produces high-strength paper, in order to meet the strength requirements of the paper sheet, it is usually used to adjust the pulp treatment process or add some additives to the pulp to improve its strength. Patent CN 102191728 B discloses the use of fiber grading sieves to classify long and short fibers, refine pulp, and add papermaking additives (strengthening agent, sizing agent, aluminum sulfate) to improve paper strength; patent CN 105780564 B discloses the use of enzymes first Treat pulp fibers, and then use fiber grading sieves to classify fibers into long, medium and short fibers to improve paper sheet strength; patent CN 109653028 A discloses the use of sodium peroxide, sodium sulfite, and disodium edetate The s...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D21J3/00
CPCD21J3/00
Inventor 缪应菊吴红李琳连明磊
Owner LIUPANSHUI NORMAL UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com