PVA MANUFACTURER---LIWEI CHEMICAL CO. LTD

PVA 0488 & PVA 0499

Polyvinyl alcohol has excellent film forming, emulsifying and adhesive properties. It is also resistant to oil, grease and solvent. It is odorless and nontoxic. It has high tensile strength and flexibility, as well as high oxygen and aroma barrier properties. However these properties are dependent on humidity, in other words, with higher humidity more water is absorbed. The water, which acts as a plasticiser, will then reduce its tensile strength, but increase its elongation and tear strength. PVA is fully degradable and dissolves quickly.
PVA is widely used in freshwater sport fishing. Small bags made from PVA are filled with dry or oil based bait and attached to the hook, or the baited hook is placed inside the bag and cast into the water. When the bag lands on the lake or river bottom it breaks down, leaving the hook bait surrounded by ground bait, pellets etc. This method helps attract fish to the hook bait.

1. PVA 0488 & PVA 0499 Specification:
Polyvinyl Alcohol PVA 0488 is Partially Hydrolyzed:

Appearance:

White crystalline powder

Degree of alcoholysis (mol/mol) %:

86.0-90.0

Viscosity mpa.s :

3.5-4.5

Volatiles(%) max:

5.0

Sodium Acetate(%) Max:

2.5

Ash(%) max:

0.7

PH value:

5-7


Polyvinyl Alcohol PVA 0499 is Fully Hydrolyzed:

Appearance:

White crystalline powder

Degree of alcoholysis (mol/mol) %:

98.0-99.0

Viscosity mpa.s :

4.0-5.0

Volatiles(%) max:

5.0

Sodium Acetate(%) Max:

2.5

Ash(%) max:

0.7

PH value:

5-7


2. PVA 0488 & PVA 0499 Application:
PVA04-88 is chiefly used to produce textile sizing materials, coatings,adhesive, and it is widely used for paper processing, emulsifying agents, dispersants and blocking colloids. Besides, it can be employed as membranes, soil modifiers,etc. Mainly used to produce textile sizing materials, coatings,adhesive, acetal derivations, and it is extensively applied to paper processings, emulgents, dispersants and blocking colloids. In addition, it can be used as membranes, soil modifiers and production materials of vinylon fiber. PVA 0488 is also used in construction field.

PVA04-99 can be used for sizing textiles,bonding agent,packing material of food,buliding paint,emulsifying agent,etc.Carotid phantoms for use as synthetic vessels in doppler flow testing. Used in eye drops and hard contact lens solution as a lubricant.