A kind of manufacturing method of micro-coated light-duty paper

A manufacturing method and technology for lightweight paper, applied in the field of papermaking, can solve the problems of poor surface flatness, easy lint and powder loss, poor filler retention, etc., and achieve the effects of improving product quality, reducing production costs, and increasing added value.

Active Publication Date: 2011-12-07
YUEYANG FOREST & PAPER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] One of the most notable features of lightweight paper is its large bulk, which determines that the pulp used to prepare lightweight paper must have high light-scattering performance and bulk at the same time as it has certain strength characteristics. Most of the light paper produced is made of high-yield chemical-mechanical pulp with good bulk, but chemical-mechanical p

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Sulphate wood pulp (35~45°SR), Italian poplar alkaline hydrogen peroxide mechanical pulp (48~68°SR), chemical thermomechanical pulp (55~75°SR), Waste paper deinking pulp (42~52°SR) four kinds of pulp are prepared according to the ratio of 5%: 55%: 25%: 15%; after that, 20% light calcium carbonate filler is added and pumped through pulping Enter the first-level four-stage cone-shaped slag remover for purification and slag removal, and then enter the degassing tank for degassing treatment; then enter the pressure screen for screening treatment (cationic PAM dosage 0.3kg / t paper, cationic starch 10kg / t paper, Adhesive alkyl ketene dimer 1.5kg / t paper is added to the inlet of the pressure sieve, modified diatomite 3.5kg / t paper is added to the outlet of the pressure sieve); Paper weight at 60g / m 2 After the wet paper leaves the wire section, it enters the press section for five-roller three-nip composite pressing, and then enters the front drying section after being presse...

Embodiment 2

[0016] After beating, the Italian poplar alkaline hydrogen peroxide mechanical pulp (48~68°SR) and chemical thermomechanical pulp (55~75°SR) whose beating degree meets the requirements are processed according to the ratio of 70%:30%. Slurry mixing; then add 20% light calcium carbonate filler, and send it to the first-stage four-stage conical slag remover through the slurry pump for purification and slag removal, and then enter the degassing tank for degassing treatment; then enter the pressure screen for screening Treatment (cationic PAM dosage 0.3kg / t paper and cationic starch 8kg / t paper, sizing agent alkyl ketene dimer 1.5kg / t paper added to the pressure screen inlet, modified diatomite 3.5kg / t paper added At the outlet of the pressure screen); and then sent to the headbox to go online, adjust the flow on the net, and control the paper weight at 60g / m 2 After the wet paper leaves the wire section, it enters the press section for five-roller three-nip composite pressing, and...

example 3

[0018] Italian poplar alkaline hydrogen peroxide mechanical pulp (48~68°SR), chemithermomechanical pulp (55~75°SR), waste paper deinking pulp (42~52°SR) whose beating degree meets the requirements after beating The three kinds of slurry are mixed according to the ratio of 45%: 25%: 30%; after that, 20% light calcium carbonate filler is added, and sent to the first-level four-stage conical slag remover through the slurry pump for purification and slag removal. Then enter the degassing tank for degassing treatment; then enter the pressure screen for screening treatment (cationic PAM dosage 0.3kg / t paper and cationic starch 11kg / t paper, sizing agent alkyl ketene dimer 1.5kg / t paper plus At the entrance of the pressure screen, the modified diatomite 3.5kg / t paper is added to the outlet of the pressure screen); then it is sent to the headbox to go online, and the flow of the net is adjusted to control the quantitative value of the paper at 60g / m 2 After the wet paper leaves the wi...

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Abstract

The invention discloses a method for making slight-coating light paper. The method comprises the following processing steps of: beating by using kraft pulp, Italian poplar alkaline peroxide mechanical pulp, chemi-thermo-mechanical pulp and waste paper deinked pulp, respectively, blending and adding auxiliary materials, making wet paper sheets, pre-drying, slightly coating, post-drying, press-polishing and finishing. According to the method disclosed by the invention, by the treatment way of coating the surface of the light paper slightly, not only are the quality performances, such as, whiteness, surface smoothness, printing suitability and the like, of the light paper increased greatly, but ash content of the light paper after coating is increased greatly also, so that energy consumptionis saved and production cost is reduced; the method disclosed by the invention has the obvious advantages, and has very important meanings to increase of additional values of high-yield chemi-thermo-mechanical pulp and light paper products, to improvement of quality of the products, and to reduction of production cost.

Description

technical field [0001] The invention relates to a method for manufacturing micro-coated light-duty paper, which belongs to the technical field of papermaking. Background technique [0002] Lightweight paper is light offset paper, which has natural and soft color and large bulk (the bulk is generally not less than 1.5cm 3 / g), high opacity and so on. In recent years, some high-quality books in China, such as literary classics, world masterpieces, social science masterpieces, and celebrity biographies, are mostly printed on light paper. Books printed on light paper have soft hue, clear images, easier to read books, strong three-dimensional effect, can reduce eye fatigue, and play a certain role in preventing myopia for primary and middle school students. They are very suitable as student textbooks and teaching materials. The official document requires that textbooks for primary and middle school students be printed on light-weight paper and be promoted and used in key provin...

Claims

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Application Information

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IPC IPC(8): D21H19/00D21H11/14D21H21/16D21H21/10D21H17/68D21H19/38D21H19/44D21H19/54D21H21/30D21H21/18
Inventor 王玉珑陈金山李丹李庆秋贺晓文
Owner YUEYANG FOREST & PAPER CO LTD
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