Hot-pressing production process of standard paperboard

A production process and cardboard technology, applied in the direction of papermaking, paper machine, fiberboard, etc., can solve the problems of uneven paper surface warping, unstable cardboard thickness, high labor intensity of workers, etc., achieve uniform moisture content, improve processing precision, The effect of high yield

Active Publication Date: 2010-07-21
XINSHAO GUANGXIN ELECTRICAL INSULATING MATERIALS
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The thickness of the cardboard produced by the cold pressing method is unstable, the difference between the same plate is large, the moisture is uneven, the paper surface is warped and uneven, the labor intensity of the workers is high, and the yield is low.

Method used

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  • Hot-pressing production process of standard paperboard
  • Hot-pressing production process of standard paperboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and 2

[0009] Examples 1 and 2, the data without brackets are from Example 1, and the data in brackets are from Example 2.

[0010] The wood pulp 1 is disintegrated into pulp 2, which is concentrated 3 by inclined sieve and then enters into pulp 4, the degree of beating is 36(40)°SR, and the wet weight is 10(14)g. After the pulp is adjusted by the adjustment box 5 to adjust the sizing amount and concentration, the sand remover 6, and the rotor screen 7 to remove the slag, it enters the pulp stabilization box 8 and flows into the circular screen 9, forming wet paper sheets that are adhered to the felt 10 and transported to the forming cylinder 11. The wet paper embryo runs circularly on the forming cylinder and is extruded and dehydrated by the idler roller 12 until the water content reaches 71 (75)%. Transfer to the wet plate transport felt 14, use the flying saw 15 to cut into a predetermined size, send it to the backing plate 16 equipped with metal mesh, enter the loading machine 1...

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PUM

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Abstract

The invention relates to a hot-pressing production process of a standard paperboard, belonging to the technical field of papermaking process and aiming to produce the standard paperboard through adopting the new hot-pressing production process. The hot-pressing production process comprises the following steps of: molding wood pulp into a wet paper blank in a molding cylinder after smashing, concentrating, grinding and stabilizing; then pressurizing and drying the wet paper blank in a hot press to form a semi-finished product; and finally, curing, calendaring and cutting, and packaging and warehousing a finished product qualified through inspection. The paperboard produced by adopting the hot-pressing process has uniform thickness, small homogeneous difference, uniform moisture and enhancement of processing precision. Meanwhile, the hot-pressing production process has high mechanical degree, can reduce production links and relieve labor intensity and has high finished product rate to reduce the recycling and consumption of waste products and save energy.

Description

technical field [0001] The invention relates to a production process of standard cardboard, and belongs to the technical field of papermaking technology. Background technique [0002] Standard cardboard is mainly used for military products, for the production of precise special molded products and packaging of important products. It requires consistent thickness, smooth paper surface, uniform moisture content, and certain elongation and mechanical strength. At present, the standard cardboard is produced by the cold pressing process, and a certain proportion of wood pulp raw materials are manufactured through processes such as shredding, beating, copying, water pressing, box drying, and calendering. The thickness of the cardboard produced by the cold pressing method is unstable, the difference between the same plate is large, the moisture is uneven, the paper surface is warped and uneven, the labor intensity of the workers is high, and the yield is low. Contents of the inve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21J1/00D21J1/04D21J1/06D21J1/10D21J1/14D21F13/04D21D1/30
Inventor 龚龑
Owner XINSHAO GUANGXIN ELECTRICAL INSULATING MATERIALS
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