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Liner for cardboard and manufacturing method of liner for cardboard

A technology of corrugated paper and cardboard, applied in the direction of paper, papermaking, special paper, etc., can solve the problems of overall hardening of cardboard, broken creasing lines, high cost of chemicals, etc., and achieve the effect of improving impact resistance

Active Publication Date: 2021-12-03
DAIO PAPER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010]As a general method to improve the impact resistance of corrugated cardboard, it is conceivable to use more paper strength enhancers for improving paper strength, but in this In the case of corrugated cardboard, the overall hardness of the cardboard for corrugated paper, the problem of broken creasing lines, and the high cost of chemicals have become problems.

Method used

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  • Liner for cardboard and manufacturing method of liner for cardboard
  • Liner for cardboard and manufacturing method of liner for cardboard
  • Liner for cardboard and manufacturing method of liner for cardboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0081] The present invention is not limited to the above-described embodiments, and can be implemented in various modified and improved forms other than the above-described forms.

[0082] For example, the containerboard for corrugated cardboard may include a single or a plurality of intermediate layers between the undersurface layer and the backside layer.

Embodiment 1

[0097] The raw materials listed in the table were added to the liquid slurry.

[0098] (additive)

[0099] (1) Rosin-based sizing agent

[0100] Harima Chemical Co., Ltd. "NS-77P" special rosin sizing agent (solid content 50%)

[0101] (2) Acrylamide paper strength enhancer

[0102] Harima Chemicals Co., Ltd. "Harmaid RB-520": two-ionic polyacrylamide (solid content 20%)

Embodiment 2～ Embodiment 7 and comparative example 1～5

[0104] Examples 2-6, Comparative Examples 1-5, and reference corrugated cardboard were obtained in the same manner as in Example 1 except that the types, addition amounts, and physical properties of the raw materials were shown in Tables 1 to 4. In addition, "one" in the following Table 1 and Table 2 shows that this component was not used. In addition, Examples 2 to 6 include a second back layer.

[0105] 【Table 1】

[0106]

[0107] 【Table 2】

[0108]

[0109] 【table 3】

[0110]

[0111] 【Table 4】

[0112]

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Abstract

This liner for cardboard is provided with at least a top surface layer, a subsurface layer and a back surface layer. The top surface layer contains softwood craft pulp, and the content of softwood craft pulp in the top surface layer is greater than or equal to 80 mass%; the subsurface layer contains softwood craft pulp and cardboard waste paper pulp and the content of softwood craft pulp in the subsurface layer is 25-35 mass%; the back surface layer contains cardboard waste paper pulp and magazine waste paper pulp, the content of the cardboard waste paper pulp in the back surface layer is 30-70 mass% and the content of the magazine waste paper pulp in the back surface layer is 30-70 mass%; and the ratio of the basis weight of the top surface layer to the overall basis weight is 20-35%, and the burst index in an atmosphere 80% RH and at 60 DEG C is greater than or equal to 3.45 kPa*m2 / g.

Description

technical field [0001] The present invention relates to a container board for corrugated paper and a method for manufacturing the container board for corrugated paper. Background technique [0002] In recent years, for corrugated cardboard used for packaging containers for packing in Southeast Asia, corrugated cardboard of normal quality has been used. Corrugated cardboard is lighter than wooden and resin containers, and has cushioning properties, so the contents are less likely to be damaged, so it is used in various fields including precision equipment. [0003] As a multilayer papermaking used for such packaging containers for packaging, for example, Patent Document 1 discloses the following technology: in a paper base material having a first layer, a second layer, and a third layer in order, by using The density of the first layer and the third layer as the outer layer is higher than that of the second layer as the middle layer, so that a paper base material having exce...

Claims

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Application Information

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IPC IPC(8): D21H27/00
CPCD21H27/00
Inventor 桐原佑太
Owner DAIO PAPER CORP
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