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A kind of white cardboard and its production process

A production process and white cardboard technology, which is applied in special paper, paper/cardboard layered products, papermaking, etc., can solve problems such as low bonding force, high cohesion of the core layer, and impact on white cardboard offset printing performance, etc. , to achieve the effect of increasing binding force, improving retention performance, and increasing binding sites

Active Publication Date: 2022-06-21
湖北骏马纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the bonding force between the core layer and other layers of the white cardboard prepared by this method is not high, and the cohesion of the core layer cannot reach a high level, which affects the offset printing performance of the white cardboard

Method used

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  • A kind of white cardboard and its production process
  • A kind of white cardboard and its production process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A production process of white cardboard, the white cardboard comprises a surface layer, a core layer and a bottom layer three-layer structure, and the production process of the white cardboard comprises the following steps:

[0029] Step S1: preparing the surface layer: the surface layer is made of 20 parts of bleached chemical soft-leaf pulp and 60 parts of bleached chemical hardwood pulp of the pulp in the back layer of beating, and sent to the surface net for papermaking;

[0030] Step S2: Preparation of the core layer: the core layer adopts 60 parts of mechanical pulp, 10 parts of broken pulp and 5 parts of deinking pulp for the core layer after beating. Amide, 5 parts of hydroxypropyl polydimethylsiloxane, 3 parts of polyhydroxyethyl methacrylate and 0.5 part of 4-amino-3-hydroxybutyric acid are mixed in proportions, diluted 5 times with deionized water, and hydrogen is added. Sodium oxide reacts for 15 minutes to form a reinforcing agent, and the reinforcing agent...

Embodiment 2

[0034] A production process of white cardboard, the white cardboard comprises a surface layer, a core layer and a bottom layer three-layer structure, and the production process of the white cardboard comprises the following steps:

[0035] Step S1: preparing the surface layer: the surface layer is made of 40 parts of bleached chemical soft-leaf pulp and 80 parts of bleached chemical hardwood pulp of the pulp in the back layer of beating, and sent to the surface net for papermaking;

[0036] Step S2: Preparation of the core layer: the core layer adopts 85 parts of mechanical pulp, 30 parts of broken pulp and 10 parts of deinking pulp for the core layer after beating. Amide, 10 parts of hydroxypropyl polydimethylsiloxane, 5 parts of polyhydroxyethyl methacrylate and 1 part of 4-amino-3-hydroxybutyric acid are mixed in proportions, diluted 10 times with deionized water, and hydrogen is added. The sodium oxide reacts for 20min to form a reinforcing agent, which is added to the out...

Embodiment 3

[0040] A production process of white cardboard, the white cardboard comprises a surface layer, a core layer and a bottom layer three-layer structure, and the production process of the white cardboard comprises the following steps:

[0041] Step S1: preparing the surface layer: the surface layer is made of 30 parts of bleached chemical soft-leaf pulp and 70 parts of bleached chemical hardwood pulp in the back layer of beating, and sent to the surface net for papermaking;

[0042] Step S2: Preparation of the core layer: the core layer adopts 70 parts of mechanical pulp, 20 parts of broken pulp and 8 parts of deinking pulp for the core layer after beating. Amide, 8 parts of hydroxypropyl polydimethylsiloxane, 4 parts of polyhydroxyethyl methacrylate and 0.8 parts of 4-amino-3-hydroxybutyric acid were mixed in proportion, diluted 8 times with deionized water, and then added hydrogen The sodium oxide reacts for 18 minutes to form a reinforcing agent, and the reinforcing agent is ad...

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Abstract

The invention provides a production process of white cardboard, the white cardboard comprises a surface layer, a core layer and a bottom layer three-layer structure, the production process of the white cardboard comprises the following steps: Step S1: preparing the surface layer: surface layer Use the slurry of the back layer of beating, and send it to the surface net for copymaking; Step S2: Prepare the core layer: the core layer uses the core layer slurry and reinforcing agent after beating, and send it to the core net for copymaking; Step S3: Prepare the bottom layer: The bottom layer uses beating Finally, the bottom layer slurry is sent to the bottom screen for papermaking; Step S4: Prepare white cardboard: apply adhesives to the bottom surface of the surface layer, the two sides of the core layer and the top surface of the bottom layer respectively, stack them neatly in sequence, and then roll and bake Get the desired white cardboard after drying; in parts by weight, the reinforcing agent includes the following components and proportioning: 10-20 parts of starch, 10-15 parts of hydroxyphenylglycinamide, 5-10 parts of hydroxypropyl base polydimethylsiloxane. The invention provides a white cardboard with high interlayer bonding force, high cohesive force of the core layer, good machine retention performance of the core layer and its production process.

Description

technical field [0001] The invention relates to the technical field of white cardboard production, in particular to a white cardboard and a production process. Background technique [0002] Coated white cardboard is a high-grade packaging material with high technical content, high quality requirements and difficult production. It is mainly used for the outer packaging of small high-end commodities and high value-added products, such as cigarettes, cosmetics, medicine, gifts, etc. [0003] The existing authorized publication number CN101644014B, the Chinese authorized invention patent titled "An anti-counterfeiting coated white cardboard and its production process" discloses an anti-counterfeiting coated white cardboard and its production process, which includes a white cardboard base paper , white cardboard base paper is provided with water-based anti-counterfeiting color coating layer, color coating layer is provided with texture, base paper is provided with at least three...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/36D21H21/18D21H17/28D21H17/07D21H17/59D21H11/02D21H11/14D21H17/37D21H17/14D21H17/64B32B29/00B32B7/12B32B33/00
CPCD21H27/36D21H21/18D21H17/28D21H17/07D21H17/59D21H11/02D21H11/14D21H17/37D21H17/14D21H17/74D21H17/64B32B29/005B32B7/12B32B33/00B32B2250/26
Inventor 林兴刚李长兵严磊
Owner 湖北骏马纸业有限公司