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Moisture-proof agent for paper surface and preparation method for moisture-proof agent

A moisture-proof agent and paper technology, applied in papermaking, textiles and papermaking, fiber raw material processing, etc., can solve problems affecting product quality, sales of finished paper, and physical indicators of finished paper, so as to save costs and energy costs, Good moisture index, quality assurance effect

Inactive Publication Date: 2012-11-28
ZIBO YONGFENG ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After the paper sheet absorbs the water vapor in the air, the moisture content will exceed 10%, which will seriously affect the product quality, and then affect the physical indicators of the finished paper, and finally affect the sales of the finished paper

Method used

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  • Moisture-proof agent for paper surface and preparation method for moisture-proof agent
  • Moisture-proof agent for paper surface and preparation method for moisture-proof agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Dissolve starch into 8% liquid, mix with 30% styrene and 20% acrylate, pour into the emulsification tank successively, stir, heat up, the temperature reaches 45°C, emulsify for 15 minutes, lift it into the reaction tank, add 5% paraffin , 1.5% of alkyl ketene dimer, at stirring speed 180r / min, reaction temperature 75 ℃, reaction time 1.5h, holding time 2h, put into cooling tank then, and add emulsifier sodium stearate ( 0.5%), antifoaming agent simethicone (0.1%).

[0020] In the process of producing cardboard paper, after the cardboard paper passes through the pre-drying section, the surface of the produced cardboard paper is coated with a moisture-proof agent on the surface of the produced cardboard paper, and then passes through the post-drying section to obtain the The water content of the cardboard paper is 92% after inspection, which is in line with the quality system standard formulated by the state.

Embodiment 2

[0022] Dissolve starch into a 7% liquid, mix with 40% styrene and 15% acrylate, pour into the emulsification tank in turn, stir, heat up, until the temperature reaches 45°C, emulsify for 10 minutes, lift it into the reaction tank, add 3% paraffin , alkyl ketene dimer 2.0%, put into cooling tank then at stirring speed 150r / min, reaction temperature 65 ℃, reaction time 2h, holding time 1.5h, and add emulsifier sodium stearate ( 0.5%), antifoaming agent simethicone (0.1%).

[0023] In the process of producing cardboard paper, after the cardboard paper passes through the pre-drying section, the surface of the produced cardboard paper is coated with a moisture-proof agent on the surface of the produced cardboard paper, and then passes through the post-drying section to obtain the The water content of the container board is 93% after inspection, which meets the quality system standard formulated by the state.

Embodiment 3

[0025] Dissolve starch into 9% liquid, mix with 35% styrene and 17% acrylate, pour into the emulsification tank successively, stir and heat up, until the temperature reaches 45°C, emulsify for 15 minutes, lift it into the reaction tank, add 4% paraffin , alkyl ketene dimer 1.8%, at a stirring speed of 200r / min, a reaction temperature of 85°C, a reaction time of 2.5h, and a holding time of 2.5h, it is then put into the cooling tank, and the emulsifier sodium stearate is added to the pipeline (0.5%), antifoaming agent simethicone (0.1%).

[0026] In the process of producing cardboard paper, after the cardboard paper passes through the pre-drying section, the surface of the produced cardboard paper is coated with a moisture-proof agent on the surface of the produced cardboard paper, and then passes through the post-drying section to obtain the The water content of the cardboard paper is 92% after inspection, which is in line with the quality system standard formulated by the stat...

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Abstract

The invention relates to a moisture-proof agent for a paper surface. The moisture-proof agent is characterized by consisting of the following raw materials in percentage by weight: 30 to 40 percent of styrene, 15 to 20 percent of acrylic ester, 8 to 10 percent of functional monomer, 0.4 to 0.6 percent of emulsifying agent, 0.05 to 0.15 percent of defoaming agent and the balance of water. After the moisture-proof agent is added, water indexes of finished paper can be well controlled, and the quality of the finished paper can be ensured; the paper is required to pass through a front drying part, a glue applicator and a rear drying part in the process of adding the moisture-proof agent, the dryness of the paper reaches 92+ / -2 percent after the paper passes through the front drying part, and a layer of moisture-proof agent is coated onto the paper after the paper passes through the glue applicator to ensure that the paper is isolated from outside air, so that the using amount of steam in the rear drying part can be greatly reduced; and after the moisture-proof agent is used, physical ring compression indexes can meet quality requirements easily, so that the using amount of other preparations such as starch fluid can be reduced, and the cost of starch and the cost of energy consumption can be saved.

Description

technical field [0001] The invention relates to a moistureproof agent for paper surface and a preparation method thereof, belonging to the industry of papermaking additives. Background technique [0002] In the papermaking process of finished paper, the national quality system standard for containerboard paper is that the paper is allowed to contain 8±2% natural moisture, so the dryness of the pulp after passing through the headbox, wire section, press section, and front and rear drying sections It must reach 90%-94%, but because the workshop environment is full of water vapor and relatively humid, so without any protection and isolation measures, after passing through the drying section, the paper with suitable dryness will absorb the moisture in the air. After the paper sheet absorbs the water vapor in the air, the moisture content will exceed 10%, which seriously affects the product quality, and then affects the physical indicators of the finished paper, and finally affec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/14
Inventor 徐书栋
Owner ZIBO YONGFENG ENVIRONMENTAL PROTECTION TECH CO LTD
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