PVA MANUFACTURER---LIWEI CHEMICAL CO. LTD

PVA 1492 & PVA 1498

Polyvinyl Alcohol is a kind of non-ionic linear high polymer. It is non-toxic, non-smelly, and it looks white or light yellow, in the form of floccules, flakiness and solid powder. Its molecular formula is (C2H4O)n, of which "n" refers to the average degree of polymerization and the molecular weight is 44n. For example, PVA 1788, 17 means the average degree of polymerization, and 88 means the alcoholysis degree. Polyvinyl alcohol (PVA) is high polymer with excellent characters to dissolve easily in water but not to dissolve in common organic solvent and organic acids, and with excellent film-forming property, oil resistant, chemical-resistant. It can react with formaldehydes to form polyvinyl acetal.

 

1. PVA 1492 & PVA 1498 Specification:
Polyvinyl Alcohol PVA 1492

Appearance:

White crystalline powder

Viscosity (mp.s)

14-18

Alcoholysis Degree %(mol/ mol)

90.0-94.0

Volatile (%) ≤

5

Sodium Acetate (%) ≤

2.5

Ash (%) ≤

0.7

PH Value

5-7

 

Polyvinyl Alcohol PVA 1498

Appearance:

White crystalline powder

Viscosity (mp.s)

12.0-17.0

Alcoholysis Degree %(mol/ mol)

98.0-99.8

Volatile (%) ≤

5

Sodium Acetate (%) ≤

2.5

Ash (%) ≤

0.7

PH Value

5-7


2. PVA 1492 & PVA 1498 Application:

PVA 1492 can produce protein fiber, special fiber by adding other substances into the original solution; also can be widely used for warp sizing and finishing; used in protective chemical-resistant gloves; PVA 1492 aqueous solution has very strong adhesive force to cellulose; can be widely used in textile industry, construction industry, etc.


PVA 1498 can be used as textile agent; for use as synthetic vessels in flow testing; used as feminine hygiene and adult incontinence products as a plastic backing sheet; also can be used as adhesive, in coating construction and textile industry.