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Anti-rust base paper and production method thereof

A production method and technology for base paper, which are applied in papermaking, pulp bleaching, textiles and papermaking, etc., can solve problems such as difficulty in meeting market demands and a small amount of waste hemp resources, so as to improve physical strength and uniformity, improve physical strength, The effect of improving the appearance

Active Publication Date: 2014-06-18
YUEYANG FOREST & PAPER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of waste hemp resources is small, and it is difficult to meet the needs of the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] 100 parts by weight of masson pine and 5 parts by weight of eucalyptus mixed fiber raw materials are made into wood chips that meet the requirements of pulping and cooking. The cooking liquid is replaced by the black liquor filled in the pot. The black liquor below 95℃ enters the first black liquor tank, and the black liquor not lower than 95℃ enters the second black liquor tank. After the replacement is completed, the cooking pot The circulation of the cooking liquid is not less than 10 minutes, the concentration of the cooking liquid in the cooking pot is uniform, the degree of sulfidation of the cooking liquid at 145°C is 30%, and the amount of alkali used is 7% of the weight of the absolute dry fiber raw material in terms of sodium oxide. The ratio of the amount of alkali used in the cooking liquid entering the first black liquor tank to that used in the second black liquor tank is 1:2; the cooking liquid at 170°C is used to replace the cooking liquid at 145°C in the...

Embodiment 2

[0019] 80 parts by weight of masson pine and 20 parts by weight of eucalyptus mixed fiber raw materials are made into wood chips that meet the requirements of pulping and cooking. The cooking liquid is replaced by the black liquor filled in the pot. The black liquor below 95℃ enters the first black liquor tank, and the black liquor not lower than 95℃ enters the second black liquor tank. After the replacement is completed, the cooking pot The cooking liquid circulation is not less than 10 minutes, the concentration of the cooking liquid in the cooking pot is uniform, the degree of sulfidation of the cooking liquid at 135 ° C is 15%, and the amount of alkali used is 5% of the weight of the absolute dry fiber raw material in terms of sodium oxide. The ratio of the amount of alkali used in the cooking liquid entering the first black liquor tank to that used in the second black liquor tank is 2.5:7; the cooking liquid at 145°C is used to replace the cooking liquid at 135°C in the co...

Embodiment 3

[0021] 90 parts by weight of masson pine and 10 parts by weight of eucalyptus mixed fiber raw materials are made into wood chips that meet the requirements of pulping and cooking. The cooking liquid is replaced by the black liquor filled in the pot. The black liquor below 95℃ enters the first black liquor tank, and the black liquor not lower than 95℃ enters the second black liquor tank. After the replacement is completed, the cooking pot The cooking liquid circulation is not less than 10 minutes, the concentration of the cooking liquid in the cooking pot is uniform, the degree of sulfidation of the cooking liquid at 140 ° C is 23%, and the amount of alkali used is 6% of the weight of the dry fiber raw material in terms of sodium oxide. The ratio of the amount of alkali used in the cooking liquid entering the first black liquor tank to that used in the second black liquor tank is 3:7; the cooking liquid at 160 °C is used to replace the cooking liquid at 140 °C in the cooking pot...

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Abstract

The invention relates to anti-rust base paper and a production method thereof. The production method comprises the following steps of: using 80-100 parts by weight of masson pine and 5-20 parts by weight of eucalyptus wood to form a mixed fiber raw material, preparing sulfate paper pulp with the Kappa number of 38-48 by displacement cooking through a DDS (displacement digester system), pulping the sulfate paper pulp to 20-23 degrees SR (Schopper-Riegler) via the pulping concentration of 3.5%-4.5%, desanding, conditioning, fine-screening by a pressure screen, placing on a net for forming, squeezing, drying and calendering by a soft roller. As for the paper, the tightness is 0.5-0.75g / cm<3>, the bursting index is not lower than 3.5Kpa.m<2> / g, the longitudinal tensile strength index is not lower than 60Nm / g, the transverse tensile strength index is not lower than 27Nm / g, the tearing index is not lower than 10mN.m<2> / g, the content of water-soluble sulfates is not higher than 150mg / kg, the content of water-soluble chlorides is not higher than 200mg / kg, and the pH value of water extract is 6.5-8.

Description

technical field [0001] The invention relates to a paper and a production method thereof, in particular to an antirust base paper and a production method thereof, belonging to the field of pulp and papermaking. Background technique [0002] Antirust paper is a functional protective paper that can prevent metal materials and products from rusting. Antirust paper is usually divided into two types: contact antirust paper and vapor phase antirust paper. The production process of the two is similar. Both use neutral base paper with good physical strength as the base material and coat a layer of chemical substances. Anti-rust base paper is different from ordinary kraft paper. In addition to requiring good physical strength indicators, it also has certain requirements for the quantification, tightness, transparency, sizing degree, pH value of the paper itself, especially the content of chloride ions and sulfate ions. strict requirements. At present, most of them still use the pap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H11/04D21C3/02D21C9/147D21C9/16D21H17/66
Inventor 李正国王福纪胥端祥朱忠颖梁好新赵桂林张素卫闫德勇
Owner YUEYANG FOREST & PAPER CO LTD