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Three-stacked net forming equipment and method for producing coating surface bleached kraft liner board

A forming equipment and kraft cardboard technology, applied in the field of papermaking, can solve problems such as high production cost, low production efficiency, and poor product quality, and achieve the effects of good smoothness, improved pressing effect, and good coating effect

Inactive Publication Date: 2011-09-14
昌乐新迈纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, although there are many production devices for producing coated white-faced kraft linerboard, there are various problems such as low production efficiency, high production cost, poor coating effect and poor product quality.

Method used

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  • Three-stacked net forming equipment and method for producing coating surface bleached kraft liner board
  • Three-stacked net forming equipment and method for producing coating surface bleached kraft liner board

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Prepare bottom layer slurry, lining layer slurry and surface layer slurry respectively, described bottom layer slurry adopts occ waste paper as raw material, described lining layer slurry adopts mixed office waste paper and waste book paper as raw material, and described surface layer The slurry uses bleached wood pulp as raw material, and the bottom layer slurry, lining layer slurry and surface layer slurry are compounded on a three-fold wire forming device according to the content ratio of 40wt%, 30wt% and 30wt%, respectively. Raw cardboard.

[0031] The base cardboard is squeezed to remove water by two straight-through shoe presses, the pressure of the first shoe is 800kN / m, and the pressure of the second shoe is 900kN / m. Dry the front drying cylinder with double-hanging drying cylinders, and then use a film transfer sizing machine for double-sided sizing. After drying again, perform hard calendering. The linear pressure of the calendering rollers is 60kN / m.

[0032...

Embodiment 2

[0035] Prepare bottom layer slurry, lining layer slurry and surface layer slurry respectively, described bottom layer slurry adopts occ waste paper as raw material, described lining layer slurry adopts waste newspaper as raw material, and described surface layer slurry adopts bleached wood pulp and bleached deinked pulp made of mixed office waste paper and waste book paper as raw materials, the bottom layer slurry, liner slurry and surface layer slurry are respectively in the content ratio of 50wt%, 25wt% and 25wt%. The original cardboard is produced by composite papermaking on the triple-fold wire forming device.

[0036] The raw cardboard is squeezed to remove moisture by two straight-through shoe presses, the crimping pressure of the first shoe is 900kN / m, and the crimping pressure of the second shoe is 1000kN / m. Dry the front drying cylinder with double-hanging drying cylinders, and then use a film transfer sizing machine for double-sided sizing. After drying again, perfor...

Embodiment 3

[0040]Prepare bottom layer slurry, lining layer slurry and surface layer slurry respectively, described bottom layer slurry adopts occ waste paper as raw material, described lining layer slurry adopts mixed office waste paper and waste book paper as raw material, and described surface layer The pulp adopts bleached deinking pulp and white paper strips made of mixed office waste paper and waste book paper as raw materials, and the bottom layer pulp, liner pulp and surface layer pulp are respectively mixed by 72wt%, 16wt% and 12wt% % of the content ratio, the original cardboard is made by composite papermaking on the triple-fold wire forming device.

[0041] The base cardboard is squeezed to remove moisture by two straight-through shoe presses, the pressure of the first shoe is 1000kN / m, and the pressure of the second shoe is 1100kN / m. The front drying cylinder of double-hanging drying cylinders is dried, then double-sided sizing is carried out, and hard calendering is carried o...

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Abstract

The invention discloses three-stacked net forming equipment and method for producing a coating surface bleached kraft liner board. The equipment comprises a three-stacked net forming device, a pressing device, a pre-drying device, a surface sizing machine, a post-drying device, a hard calendering device, a first blade coater, a first blade coating post-drying device, a curtain coater, a curtain coating post-drying device, a second blade coater, a second blade coating post-drying device, a soft calendering device, a cooling device and a coiling forming device which are sequentially arranged on a machine frame. In the invention, sizing agents at the bottom layer, the lining and the surface layer are respectively made of different raw materials with proper proportions to ensure that the produced kraft liner board has low basis weight and high strength; during the coating, the surface layer sizing is firstly carried out on a raw paperboard to ensure that the uniformity of absorbing printing ink of the kraft liner board is improved; and the respective superiorities of the curtain coating and the blade coating are combined to ensure that the coating layer surface has high smoothness and the requirements for the coating surface bleached kraft liner board in different printing modes and different fields can be satisfied.

Description

[0001] technical field [0002] The invention relates to the technical field of papermaking, in particular to a triple-wire forming device for producing coated white-faced kraftboard and a method for producing coated white-faced kraftboard by using the device. Background technique [0003] Kraft linerboard is generally made of waste paper or wood pulp as raw materials. It is generally divided into bottom layer and surface layer or bottom layer, core layer and surface layer. It has low cost and high strength, but its surface is rough and its printability is poor. At present, in order to save costs, many commodity packaging generally use kraft cardboard as packaging materials. However, with the improvement of people's living standards and the pursuit of packaging quality, the use of kraft cardboard can no longer meet the needs of some exquisite and high-end products. [0004] Coated white kraft linerboard is increasingly becoming a widely used packaging material due to its hi...

Claims

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Application Information

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IPC IPC(8): D21H19/00D21H23/34D21H23/48D21F1/10D21H27/30B32B29/00
Inventor 王东兴慈晓雷盛永忠吕兆岗
Owner 昌乐新迈纸业有限公司
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