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Preparation method of low-basis-weight high-strength glassine paper

A glassine paper, high-strength technology, applied in the field of papermaking, can solve the problem of low tear resistance, reduce the generation of fine broken fibers, have good tensile strength, and improve physical properties.

Inactive Publication Date: 2020-12-11
浙江哲丰新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to overcome the problem of low tear strength of low-weight paper, the present invention provides a method for preparing low-weight high-strength glassine paper. The prepared glassine paper not only has low basis weight, but also has good toughness and strong thermal stability. Good tensile strength, by introducing a low-viscosity sizing agent with high fluidity and good film-forming properties for sizing, the tear resistance of the sizing agent itself is improved, and the bonding force between the sizing agent and the base paper is improved ; Use fibers of different lengths to match each other, while increasing the fiber bonding area, try to avoid the cutting effect of fibers, reduce the generation of small broken fibers, and enhance the strength of low-weight paper sheets

Method used

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  • Preparation method of low-basis-weight high-strength glassine paper

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preparation example Construction

[0038] A preparation method for low-quantity high-strength glassine paper, comprising the following preparation steps:

[0039] (1) Slurry preparation: the raw material slurry is subjected to biological treatment, and then mixed and beaten with additives to prepare a mixed slurry; the raw material slurry contains larch pulp with a mass ratio of 50-65:25-30:5-15 , eucalyptus pulp and glass chopped fiber; the degree of beating of the larch pulp is 45-55°SR, the wet weight is 4-7g, and the concentration of beating is 4.0-5.0%; the degree of beating of the eucalyptus pulp is 35-5. 40°SR, the wet weight is 3-5g, the beating concentration is 3-5%; the length of the glass chopped fibers is 3-5.5mm; the additives include: degassing agent, the amount per ton of paper is 0.4-0.6kg; Defoamer, the dosage per ton of paper is 0.3-0.5kg;

[0040] Biological treatment: Add sodium hydroxide to the raw material slurry to adjust the pH to 8-10, add a mixture of cellulase and xylanase, stir for ...

Embodiment 1

[0049] A preparation method for low-quantity high-strength glassine paper, comprising the following preparation steps:

[0050] (1) Pulp preparation: the raw material slurry is subjected to biological treatment, and then mixed with additives for beating to prepare a mixed slurry; the raw material slurry contains larch pulp, eucalyptus pulp and glass with a mass ratio of 58:28:10 Chopped fibers; the beating degree of the larch pulp is 50°SR, the wet weight is 6g, and the beating concentration is 4.5%; the beating degree of the eucalyptus pulp is 38°SR, the wet weight is 4g, and the beating concentration is 4% ; The length of the glass chopped fibers is 4.5mm; auxiliary agents include: degassing agent, the amount per ton of paper is 0.5kg; defoamer, the amount per ton of paper is 0.4kg;

[0051] Biological treatment: Add sodium hydroxide to the raw material slurry to adjust the pH to 9, add a mixture of cellulase and xylanase, stir for 4 hours, and perform sterilization treatmen...

Embodiment 2

[0060] A preparation method for low-quantity high-strength glassine paper, comprising the following preparation steps:

[0061] (1) Pulp preparation: the raw material slurry is subjected to biological treatment, and then mixed and beaten with additives to prepare a mixed slurry; the raw material slurry contains larch pulp, eucalyptus pulp and glass with a mass ratio of 50:30:5 Chopped fibers; the beating degree of the larch pulp is 45°SR, the wet weight is 4g, and the beating concentration is 4.0%; the beating degree of the eucalyptus pulp is 35°SR, the wet weight is 3g, and the beating concentration is 3% The length of the chopped glass fiber is 3mm; the auxiliary agent includes: a degassing agent, the consumption per ton of paper is 0.4kg; defoamer, the consumption per ton of paper is 0.3kg;

[0062] Biological treatment: Add sodium hydroxide to the raw material slurry to adjust the pH to 8, add a mixture of cellulase and xylanase, stir for 4 hours, and carry out sterilizati...

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Abstract

The invention relates to the technical field of papermaking, and provides a preparation method of low-basis-weight high-strength glassine paper in order to solve the problem of low tear strength of low-basis-weight paper. The preparation method comprises the following steps of: (1) slurry preparation: carrying out biological treatment on raw material slurry, and then mixing the slurry with an auxiliary agent and pulping the mixture to obtain mixed slurry; (2) raw paper preparing: sequentially carrying out activation modification, net part papermaking, squeezing and pre-drying on the mixed slurry to obtain raw paper; (3) sizing: entering a surface sizing treatment procedure, and performing surface sizing on the raw material paper in the step (2) by adopting an unsaturated polyester sizing agent to obtain paper subjected to surface sizing treatment; and (4) paper forming: carrying out post-drying, calendaring, rolling and slitting on the paper sheet subjected to surface sizing treatmentto obtain a finished product. The prepared glassine paper is low in basis weight, good in toughness, high in thermal stability and good in tensile strength. The low-viscosity sizing agent with good film-forming property is introduced, so that the tear resistance of the sizing agent and the binding force between the sizing agent and the raw paper of the paper are improved.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for preparing glassine paper with low basis weight and high strength. Background technique [0002] Glassine base paper is a kind of industrial paper, which is made into glassine paper after rewetting, super calendering and silicone oil coating. Glassine paper is dense and uniform in texture, has good internal strength and transparency, and is a common material for making barcode labels, self-adhesives, tapes and sticky industrial products. Glassine paper has a certain function of high temperature resistance, moisture resistance and oil resistance. It is generally used in the packaging of food, medicine and other industries, such as high-speed automatic labeling (especially suitable for high-speed label sticking), special tapes, double-sided tape substrate trademarks, laser Anti-counterfeiting labels and other release applications, etc. Because glassine paper is mo...

Claims

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Application Information

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IPC IPC(8): D21H27/00D21D1/02D21F11/00D21H23/22D21H21/16D21H21/12D21H21/06D21H25/00D21H25/04
CPCD21H27/00D21D1/02D21F11/00D21H23/22D21H21/16D21H21/12D21H21/06D21H25/00D21H25/04
Inventor 史君齐岳跃振黄兴全单升来韩伟伟龙顺强
Owner 浙江哲丰新材料有限公司
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