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

Process for making paper using cationic amylopectin starch

An amylopectin and cationic technology, applied in the field of papermaking, can solve problems such as weakening ink transfer, and achieve the effects of improving the ability to resist paper lint, reducing papermaking costs, and reducing paper lint.

Inactive Publication Date: 2009-06-24
COOP AVEBE U A (NL)
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Lint means weak bonding between conduits and other fibers and fines, but ink resistance in offset presses means low surface energy (insufficient wetting) and / or localized changes in compressibility impair ink transfer

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
  • Process for making paper using cationic amylopectin starch
  • Process for making paper using cationic amylopectin starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In this example, the following two cationic starch products containing quaternary ammonium substituents (degree of substitution 0.035) were used as wet end additives for papermaking.

[0037] A. Cationic potato starch (contains about 20% by weight amylose based on dry matter, Amylofax PW)

[0038] B. Cationic amylopectin potato starch (contains about 2% by weight amylose on dry matter basis according to the invention, PR0602A)

[0039] The cationic starch product was slurried in water to form a suspension containing 10% by weight starch. The suspension was gelled with steam. The resulting starch solution was diluted with water to 1% by weight dry matter.

[0040] The test pulp consisted of a mixture of 38% long fiber, 28% short fiber (eucalyptus) and 34% CTMP. Calcium carbonate was added as filler to give a final ash content of 16% in the paper. The amount of cationic starch added was 1.0% by weight (dry matter). The test pulp is made into handmade paper (paper wei...

Embodiment 2

[0043] In this example, the same two cationic starch products containing quaternary ammonium substituents (degree of substitution 0.035) as in Example 1 were used.

[0044] The test pulp consisted of a mixture of 42% long fibers, 8% short fibers (eucalyptus) and 50% CTMP. Calcium carbonate was added as filler to give a final ash content of 16% in the paper. The amount of cationic starch added was 1.0% by weight (dry matter). The test pulp is made into handmade paper (paper weight is 80g / m2) with a paper sample picker 2 ). The handsheets were dried to a moisture content of 7% by weight.

[0045] Paper lint tendency was determined by performing lint using the Prufbau dry pick test described in Tappi Journal, July 1994, p. 185. The test ink was a high viscosity ink (Huber 408004). Paper lint tendency was estimated visually and the results are shown in figure 1 middle.

[0046] in conclusion

[0047] For both pulp qualities (ie Examples 1 and 2) a significant improvement i...

Embodiment 3

[0049] In this example, the same two cationic starch products containing quaternary ammonium substituents (degree of substitution 0.035) as in Example 1 were used. The test pulp consisted of a mixture of 38% long fiber, 28% short fiber (eucalyptus) and 34% CTMP. Calcium carbonate was added as filler to give a final ash content of 10% in the paper. The amount of cationic starch added was 1.0% by weight (dry matter).

[0050] Paper pulp is made into paper (paper weight is 200g / m 2 ). The resulting paper was surface sized using a Dixon size press at an operating speed of 50 meters per minute.

[0051] As surface sizing starch, an aqueous solution of Perfectamyl A4692 (AVEBE) was applied at concentrations of 4%, 8% and 12%. The starch content of the different papers was determined by conversion of amylase into glucose followed by glucose determination with the hexokinase method according to Boehringer. Paper lint tendency was determined by linting using the Prufbau dry pick t...

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

The invention relates to the field of papermaking. More in particular, the invention relates to a method of reducing the phenomenon of vessel picking in papermaking. In accordance with the invention it has surprisingly been found that the problem vessel picking may be significantly reduced by using a cationic amylopectin starch in the paper pulp, i.e. in the wet-end.

Description

technical field [0001] The present invention relates to the field of papermaking. More specifically, the present invention relates to improvements in the manufacture of paper from hardwood pulp such as eucalyptus. Background technique [0002] Eucalyptus pulp has gained prominence in papermaking over the past few years due to its rapid tree growth and benefits to paper uniformity and printability. This extends not only to printing and writing grade papers, but also to white facing linerboard. Eucalyptus, such as E. grandis and E. globulus, are often associated with the Iberian Peninsula and Latin America. In other parts of the world, there are legitimate reasons for using native tree species such as alder, locust, birch and oak. [0003] All hardwoods share common structural features in the wood, most notably ducts, which run throughout the stem and act as water pipes, carrying water from the roots to the rest of the tree. Conduits are generally much thicker than fibers,...

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): D21H17/29
CPCD21H17/29
Inventor T·A·威勒玛J·巴斯
Owner COOP AVEBE U A (NL)
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