Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method for manufacturing high-strength paper board by old and useless newsprint

A newsprint, high-strength technology, applied in the field of papermaking, can solve the problems of reduced strength, limited application range, low strength of recycled paper, etc., achieve low cost, avoid excessive cutting, and facilitate the realization of industrial production

Inactive Publication Date: 2011-08-17
TIANJIN UNIV OF COMMERCE
View PDF0 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the strength of waste paper fibers is significantly lower than that of virgin fibers, the strength of recycled paper produced by waste paper usi

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Pick out the impurities (such as plastic, tape, box nails, sediment, etc.) in the collected waste newsprint, then tear the waste newsprint into paper sheets of uniform size, and beat the waste paper sheets in a beating machine. The beating time was 9 min. According to the predetermined quantitative 200g / m 2 The pulp is weighed, paved, then dehydrated and formed, and dried at 90° C. for 10 minutes to obtain a cardboard blank. The cardboard blank was hot-pressed by a hot-pressing machine, the hot-pressing pressure was 15MPa, the hot-pressing temperature was 180°C, and the hot-pressing time was 2min. After hot pressing, the edges are trimmed to obtain the finished cardboard. After testing, the moisture content of the cardboard is 9.4%, the tensile strength is 7.892kN / m, the tear strength is 203.3mN, the burst strength is 357kPa, the stiffness is 16.14mN.m, and the ring compressive strength is 436.4N.

Embodiment 2

[0019] All the operation steps of Example 1 were repeated, except that the hot pressing temperature used was 160°C. After testing, the obtained cardboard has a moisture content of 11.9%, a tensile strength of 4.823kN / m, a tear strength of 147.3mN, a burst strength of 387.5kPa, a stiffness of 15.37mN.m, and a ring compressive strength of 386.4 N.

Embodiment 3

[0021] All the operation steps of Example 1 were repeated, except that the hot pressing temperature used was 170°C. After testing, the obtained cardboard has a moisture content of 10.7%, a tensile strength of 6.206kN / m, a tear strength of 166.7mN, a burst strength of 414.8kPa, a stiffness of 17.58mN.m, and a ring compressive strength of 400.6 N.

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

PropertyMeasurementUnit
Tensile strengthaaaaaaaaaa
Tearaaaaaaaaaa
Burst resistanceaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for manufacturing a high-strength paper board by old and useless newsprint, which is capable of improving the strength of recycled paper produced by waste paper, improving the protecting performance of the paper board and expanding the application scope of the paper board. The method comprises the steps of: carrying out pulping treatment on scraps of the old and useless newsprint in a beating machine to obtain paper pulp; processing the paper pulp into blank of the paper board; carrying out hot-press molding on the blank of the paper board by a hot-press machine, wherein the hot-press pressure is 5-25MPa, the hot-press temperature is 160-220 DEG C, and the hot-press time is 1-5 minutes; and leading the moisture content of the blank of the paper board to be reduced to 6-12% to obtain the paper board. The method leads the components such as lignin, hemicellulose and the like in the old and useless newsprint to be cured under the actions of high temperature and high pressure of the hot-press machine, so that the strength and the protecting performance of the paper board can be remarkably improved and can be compared favorably with the paper board produced by primary fiber through wet processing. The method has the advantages of being rich in materials, low in cost, simple in processing technique, convenient in implementation of industrialized production and the like.

Description

technical field [0001] The invention belongs to the field of papermaking, and more specifically relates to a method for manufacturing high-strength cardboard by using waste newsprint. Background technique [0002] The recycling of waste paper is an effective way to save precious fiber raw materials, relieve energy shortage and protect the environment. of attention. [0003] At present, the recovered waste paper mainly adopts the traditional wet process to produce the waste paper recycled paper. However, because the strength of waste paper fibers is significantly lower than that of virgin fibers, the strength of recycled paper produced by traditional wet process is not high, and it is often difficult to meet the requirements of practical applications, which limits the scope of application. SUMMARY OF THE INVENTION [0004] In order to overcome the deficiencies in the prior art, the present invention provides a method for manufacturing high-strength cardboard by using wast...

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): D21C5/02D21J3/12
CPCY02W30/64
Inventor 罗鹏
Owner TIANJIN UNIV OF COMMERCE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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