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

Raw paper, preparation method thereof, and craft paper

A kind of kraft paper and core layer technology, which is used in the preparation of base paper, kraft paper and base paper, can solve the problems of rising prices, excessive deforestation, and high production cost of packaging cartons.

Active Publication Date: 2013-03-20
JIAN GRP
View PDF2 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] From an environmental point of view, commercial wood pulp is made of raw wood, which may cause excessive deforestation and environmental damage if used in large quantities
In addition, due to the lack of natural wood resources in our country, a large amount of commercial wood pulp relies on imports, and the price gradually rises, which increases the production cost of kraft cardboard and leads to high production costs of packaging cartons.

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
  • Raw paper, preparation method thereof, and craft paper

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see figure 1 , the kraft cardboard quantitatively described in this embodiment is 140g / m 2 , consisting of a surface layer 2, a core layer 3, a bottom layer 4, a front sizing layer 1 and a back sizing layer 5, wherein the lower surface of the core layer 3 is fixed on the upper surface of the bottom layer 4, and the lower surface of the surface layer 2 is fixed On the upper surface of the core layer 3 , the lower surface of the front sizing layer 1 is fixed on the upper surface of the surface layer 2 , and the upper surface of the back sizing layer 5 is fixed on the lower surface of the bottom layer 4 .

[0033] The surface layer 2 is made of American waste secondary fibers, the core layer 3 and the bottom layer 4 are made of long fibers and short fibers classified from OCC secondary fibers, and the weight percentage of long fibers in the core layer 3 is 75% , the balance is short fiber. The percentage by weight of long fibers in the bottom layer 4 is 20%, and the bala...

Embodiment 2

[0043] The kraft cardboard quantitatively described in the present embodiment is 120g / m 2 , this embodiment is basically the same as Embodiment 1, the main difference has the following points:

[0044] 1. The long fibers in the core layer account for 65% by weight, and the balance is short fibers.

[0045] 2. The weight percentage of long fibers in the bottom layer is 30%, and the balance is short fibers.

[0046] The process for preparing the kraft cardboard in the invention is simple, the production cost is low, and the quality of the manufactured kraft cardboard is good.

[0047] The performance parameter table of kraft cardboard described in embodiment 1 and embodiment 2

[0048]

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 belongs to the technical field of papermaking, relates to a raw paper, and further discloses a preparation method of the raw paper, and a craft paper in order to solve a problem that American wasted linear paper is used to substitute the use of a certain amount of a wood pulp added in traditional technologies on the premise of ensuring the strength and the paper appearance when the kraft board paper is produced. The raw paper sequentially comprises a surface layer, a core layer and a bottom layer, and the surface layer is prepared through using American wasted secondary fibers with the beating degree of 35-45DEG SR, so the above technical problem can be effectively solved.

Description

technical field [0001] The invention belongs to the technical field of papermaking, relates to a base paper, and further discloses a preparation method of the base paper and a kraft cardboard. Background technique [0002] Kraft cardboard has good strength and low basis weight, making it a versatile packaging material. At present, the commonly used kraft cardboard generally uses wood pulp and secondary fiber as the surface layer slurry, so as to improve the strength of the paper and the appearance of the paper surface. The amount of wood pulp is generally about 30% of the surface layer pulp, and one ton of finished paper The commercial wood pulp needs to be about 50~60kg, and the price of commercial wood pulp is much higher than that of waste paper pulp. [0003] From an environmental point of view, commercial wood pulp is made from raw wood, and its use in large quantities may lead to excessive deforestation and environmental damage. In addition, due to the lack of natura...

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 Applications(China)
IPC IPC(8): D21H27/30D21H19/84D21H19/14D21H21/16B32B29/00
Inventor 冯军贤王宏伟汪海峰吴永金李聪定赖德坤
Owner JIAN GRP