What are the main functions of polyvinyl alcohol powder?

Polyvinyl alcohol powder is a widely used water-soluble polymer. Its performance is between plastic and rubber. What are its functions? Here are the main functions of several polyvinyl alcohol powders:

1. Polyvinyl alcohol powder has strong adhesion and strong film-forming strength. It can be used instead of starch and casein or in combination with it. It can be used as a color carrier for coated paper, or as a sizing agent for surface sizing of copper plate paper, wear-resistant paper, blueprint base paper and kraft paper, which can improve the wear-resistant, folding and tear strength of paper, gloss, smoothness and printing adaptability.

2. The size mainly prepared by polyvinyl alcohol powder is the most efficient synthetic sizing agent and fabric processing agent among sizing agents. It has good adhesion to cotton, hemp, polyester, vinylon and viscose fibers. The size film is colorless and transparent, strong toughness, wear-resistant, sun resistant, high mechanical strength and can reduce the end breakage rate of cloth machine. Due to the small sizing amount, the woven cloth feels crisp, smooth and fine The cloth surface is not rough, the number of winding pieces can be increased, and desizing is also easy.

3. In the presence of polyvinyl alcohol powder and formaldehyde, acetaldehyde, butyraldehyde or other aldehydes or acid catalysts, acetalized polyvinyl alcohol powder derivatives are formed, which further improves the water resistance and adhesion of polyvinyl alcohol.

4. A series of adhesives made of polyvinyl alcohol powder as the main raw material have good adhesion to paper, cloth and wood. They are widely used. They have good adhesion, water solubility and non-toxic. They can also develop isocyanate adhesives without formaldehyde and strong water resistance.

5. The film made of polyvinyl alcohol powder has good transparency, high tensile and crack resistance, good moisture permeability and heat insulation, oil resistance, resistance to organic drugs and no static electricity. Therefore, it can be used in textile packaging and food packaging. It is non-toxic, tasteless, pollution-free and degradable. In addition, it can be combined with polyethylene and polypropylene for instrument packaging and printing plate making.

6. After washing, dissolving and spinning, polyvinyl alcohol powder can be blended with wool, cotton, viscose and other fibers to make vinylon products, non-woven fabrics and geotextiles. It is widely used in clothing, industrial cord, fishnet rope, tarpaulin, agriculture and sanitary materials.




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