Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of waste paper recycling to produce low grammage kraft cardboard and its production process

A production process and low gram weight technology, applied in the field of papermaking, can solve the problems of low strength of recycled fiber regenerated kraft paper and reduce the basis weight of kraft paper, and achieve the effects of improving bonding force, considerable income and reducing production costs.

Active Publication Date: 2017-05-17
河北昌泰纸业有限公司
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reduction in the strength of recycled fiber is the main reason for the low strength of recycled kraft cardboard, so how to increase the strength of recycled fiber and the bonding force between recycled fibers to increase the strength of recycled kraft cardboard and reduce the quantitative of kraft cardboard, It is a topic that has been studied by those skilled in the art

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
  • A kind of waste paper recycling to produce low grammage kraft cardboard and its production process
  • A kind of waste paper recycling to produce low grammage kraft cardboard and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A waste paper recycling and production of low-gram-weight kraft cardboard and its production process are characterized in that it includes the following processes:

[0032] (1) Waste paper treatment process

[0033] a. Pulping: put the waste paper into a hydropulper, dissociate the raw material into fibers, and obtain a raw pulp with a concentration of 4.0%;

[0034] b. Purification and sieving: the pulped slurry is subjected to sand settling and slag removal, and fiber sieving is carried out, and it is divided into long fibers and short fibers according to the length of the fibers;

[0035] c. Fiber surface modification: carry out surface modification to the long fibers and short fibers after purification and sieving respectively, the surface modification process of waste paper fibers: a certain amount of sodium hydroxide isopropanol solution with a mass fraction of 0.2% Add it into the slurry, stir and mix well, add a quantitative mass fraction of 0.5% isopropanol so...

Embodiment 2

[0045] A waste paper recycling and production of low-gram-weight kraft cardboard and its production process are characterized in that it includes the following processes:

[0046] (1) Waste paper treatment process

[0047] a. Pulping: put the waste paper into a hydropulper to dissociate the raw material into fibers to obtain a raw pulp with a concentration of 4.5%;

[0048] b. Purification and sieving: the pulped slurry is subjected to sand settling and slag removal, and fiber sieving is carried out, and it is divided into long fibers and short fibers according to the length of the fibers;

[0049]c. Fiber surface modification: carry out surface modification respectively to long fiber and short fiber after purification and sieving, the surface modification process of waste paper fiber: a certain amount of mass fraction is 2% sodium hydroxide isopropanol solution Add it into the slurry, stir and mix well, add a quantitative mass fraction of 3% isopropanol solution of chloroace...

Embodiment 3

[0059] A waste paper recycling and production of low-gram-weight kraft cardboard and its production process are characterized in that it includes the following processes:

[0060] (1) Waste paper treatment process

[0061] a. Pulping: put the waste paper into a hydropulper, dissociate the raw material into fibers, and obtain a raw pulp with a concentration of 5.0%;

[0062] b. Purification and sieving: the pulped slurry is subjected to sand settling and slag removal, and fiber sieving is carried out, and it is divided into long fibers and short fibers according to the length of the fibers;

[0063] c. Fiber surface modification: carry out surface modification respectively to long fiber and short fiber after purification and sieving, the surface modification process of waste paper fiber: a certain amount of mass fraction is 0.8% sodium hydroxide isopropanol solution Add it into the slurry, stir and mix well, add a quantitative mass fraction of 1% isopropanol solution of chloro...

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 aims to provide low-gram-weight kraft paper produced from reclaimed waste paper and a production process. The production process comprises pulping, purification, sieving, fiber surface modification, heat dispersion, ground pulp concentration and paper making, wherein fiber surface modification is surface modification on purified and sieved long fibers and short fibers, and a surface modifier is added according the length and the dosage of waste paper fibers. The low-gram-weight kraft paper and the production process have the benefits as follows: waste paper pulp and raw wood pulp are mixed for use, the fiber strength and the binding force of reclaimed fibers can be improved through surface modification of the waste paper fibers, thus, the strength of the recycled kraft paper is improved, the fixed quantity of solutions for the kraft paper is reduced, and the produced kraft paper is lower than 100g / m<2>. The reclaimed waste paper is used for preparing the low-gram-weight kraft paper, energy consumption and the discharge capacity can be further reduced while the production cost is reduced, and the low-gram-weight kraft paper has considerable benefits in the aspect of economy and environment.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a waste paper recycling and production of low-gram-weight kraft cardboard and a production process. Background technique [0002] Waste paper is an important renewable resource, and the recycling of waste paper is the main way to solve the problems faced by the paper industry, such as the shortage of waste paper and papermaking raw materials, energy shortage and serious pollution. In the field of kraft cardboard manufacturing, the production method of using waste paper as the main raw material to produce recycled kraft cardboard has also been valued by the industry. This method can reduce the use of native plant fiber raw materials and realize the recycling of pollutants in papermaking wastewater Utilization is in line with the concept of low-carbon environmental protection, and at the same time reduces production costs and improves the production efficiency of paper-making e...

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
Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/14D21C5/02D21F9/00
CPCD21C5/022D21F9/00D21H11/14Y02W30/64
Inventor 杜远彭国昌
Owner 河北昌泰纸业有限公司