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Starch-free PVA collodion cotton and preparation method thereof

A technology of collodion and starch, which is applied in the field of functional polymer materials, can solve problems affecting product quality, environmental pollution, and water eutrophication, so as to avoid water eutrophication and environmental pollution, reduce production costs, and improve production processes. simple effect

Inactive Publication Date: 2017-01-25
SUQIAN JIAHE PLASTIC METAL PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the traditional production process of PVA collodion, a large amount of starch is used as a pore-forming agent, and finally all of them have to be washed away, resulting in waste of resources, and the cleaning process of starch consumes a lot of water, and the starch is discharged with water, resulting in eutrophication of water quality , causing pollution to the environment
In addition, the starch filled in the collodion is difficult to clean completely, and the residual starch will breed mold and cause black spots on the surface of the collodion, which seriously affects the quality of the product and limits the application range of the collodion.

Method used

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  • Starch-free PVA collodion cotton and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Add 65g of PVA and 400g of water into the reaction vessel in turn, start stirring, heat the water bath to 80-95°C, stir for 1.5-2 hours until the PVA is completely dissolved, and obtain a PVA aqueous solution;

[0020] (2) Cool down the PVA aqueous solution prepared in step (1) to 72-78°C, add 2.2g xanthan gum, adjust the speed to 700-800r / min, stir well until the thickener is completely dissolved, add 3g dodecane Sodium sulfate, increase the speed to 1000-1200r / min, stir at high speed, make the solution foam freely to 1.7 times the original volume, control the temperature in the reaction vessel at 54-60°C, add 42g of 31% hydrochloric acid, 53g of formaldehyde with a concentration of 37.5% was stirred until the solution was evenly mixed to obtain 565.2g of viscous foam;

[0021] (3) Inject the viscous foam prepared in step (2) into the mold, then place the mold filled with the viscous foam in an oven, and cure at 60-75°C for 5-9 hours;

[0022] (4) The collodion so...

Embodiment 2

[0024] (1) Add 2.1kg of PVA and 13kg of water into the reaction vessel in turn, start stirring, heat the water bath to 80-95°C, stir for 1.5-2 hours until the PVA is completely dissolved, and obtain a PVA aqueous solution;

[0025] (2) Cool down the PVA aqueous solution prepared in step (1) to 72-78°C, add 71.5g of xanthan gum, adjust the speed to 700-800r / min, stir well until the thickener is completely dissolved, add 100g of dodecane Sodium sulfate, increase the speed to 1000-1200r / min, stir at high speed, make the solution foam freely to 1.7 times the original volume, control the temperature in the reaction vessel at 54-60°C, add 1.25kg of hydrochloric acid with a concentration of 31.5% in sequence 1.75kg of formaldehyde with a concentration of 36.5% was stirred until the solution was evenly mixed to obtain 18.17kg of viscous foam;

[0026] (3) Inject the viscous foam prepared in step (2) into the mold, then place the mold filled with the viscous foam in an oven, and cure a...

Embodiment 3

[0029] (1) Add 2.3kg of PVA and 16.5kg of water into the reaction vessel in sequence, start stirring, heat the water bath to 80-95°C, stir for 1.5-2 hours until the PVA is completely dissolved, and obtain a PVA aqueous solution;

[0030] (2) Cool down the PVA aqueous solution prepared in step (1) to 72-78°C, add 65g of xanthan gum, adjust the speed to 700-800r / min, stir well until the thickener is completely dissolved, add 90g of dodecyl Sodium sulfate, increase the speed to 1000-1200r / min, stir at high speed, make the solution foam freely to 1.7 times the original volume, control the temperature in the reaction vessel at 54-60°C, add 1.1kg of 31.5% hydrochloric acid, 1.8kg of formaldehyde with a concentration of 37.5% was stirred until the solution was evenly mixed to obtain 21.86kg of viscous foam;

[0031] (3) Inject the viscous foam prepared in step (2) into the mold, then place the mold filled with the viscous foam in an oven, and cure at 60-75°C for 5-9 hours;

[0032] ...

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Abstract

The invention discloses starch-free PVA collodion cotton. The used raw materials are as follows by weight mass: PVA to water to a thickening agent to an activating agent to hydrochloric acid to formaldehyde is equal to (9-15):(65-75):(0.1-0.5):(0.2-1.2):(5-10):(8-11). A preparation method comprises the following steps: (1) preparing a solution; (2) foaming; (3) performing curing molding; and (4) performing aftertreatment. The starch-free PVA collodion cotton has the advantages that the production process is simple; starch is not added in the preparation process of the PVA collodion cotton, so the production cost of enterprises is reduced; furthermore, substances which pollute the water quality are not generated in the aftertreatment process, so the phenomena of water quality eutrophication and environmental pollution are effectively avoided.

Description

technical field [0001] The invention relates to a water-absorbable functional polymer material, in particular to a starch-free PVA collodion and a preparation method thereof. Background technique [0002] PVA collodion is a foam material made from polyvinyl alcohol through acetal reaction. It has strong water absorption, has the feel and elasticity of a natural sponge in a wet state, has good softness, uniform and rich cells, and high tensile strength. It has been widely used in cleaning and hygiene products, such as household mops, cosmetic powder puffs, and buckskin towels. Wait, the market demand is huge. In the traditional production process of PVA collodion, a large amount of starch is used as a pore-forming agent, and finally all of them have to be washed away, resulting in waste of resources, and the cleaning process of starch consumes a lot of water, and the starch is discharged with water, resulting in eutrophication of water quality , causing pollution to the env...

Claims

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Application Information

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IPC IPC(8): C08L29/04C08L5/00C08K5/42C08K3/16C08K5/07C08J9/00
Inventor 何卫东陆克峰
Owner SUQIAN JIAHE PLASTIC METAL PROD
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