Product specification:
|
Item
|
Hydrolysis
(mol%)
|
Viscosity
(cps)
|
Volatiles
(%)max
|
Ash
(%)max
|
PH Value
|
|
PVA17-88
|
87.0-89.0
|
20.5-24.5
|
5.0
|
0.5
|
5-7
|
|
PVA20-88
|
87.0-89.0
|
27.0-33.0
|
5.0
|
0.5
|
5-7
|
|
PVA22-88
|
87.0-89.0
|
30.0-36.0
|
5.0
|
0.5
|
5-7
|
|
PVA24-88
|
87.0-89.0
|
40.0-48.0
|
5.0
|
0.5
|
5-7
|
|
PVA26-88
|
87.0-89.0
|
44.0-54.0
|
5.0
|
0.5
|
5-7
|
|
PVA15-99
|
98.0-99.3
|
19.0-23.0
|
5.0
|
0.5
|
5-7
|
|
PVA17-97
|
96.0-98.0
|
23.0-29.0
|
5.0
|
0.5
|
5-7
|
|
PVA17-99
|
98.0-99.3
|
25.0-31.0
|
5.0
|
0.5
|
5-7
|
|
PVA20-99
|
98.0-99.3
|
36.0-44.0
|
5.0
|
0.5
|
5-7
|
|
PVA22-97
|
96.0-98.0
|
38.0-46.0
|
5.0
|
0.5
|
5-7
|
|
PVA22-99
|
98.0-99.3
|
45.0-55.0
|
5.0
|
0.5
|
5-7
|
|
PVA24-97
|
96.0-98.0
|
47.0-57.0
|
5.0
|
0.5
|
5-7
|
|
PVA24-99
|
98.0-99.3
|
50.0-60.0
|
5.0
|
0.5
|
5-7
|
Properties
Polyvinyl alcohol(PVA) 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 is a quick dissolver. PVA has
a melting point of 230°C and 180-190 C for the fully hydrolysed and partially hydrolysed grades, respectively. It decomposes rapidly but exhibits crystallinity as the hydroxyl groups are small enough to fit into the lattice without disrupting it.
Application
1.Adhesive and thickener material in latex paints, paper coatings, release liner, hair sprays, shampoos and glues.
2.Textile sizing agent.
3.Carbon dioxide barrier in polyethylene terephthalate(PET)bottles
4.Carotid phantoms for use as synthetic vessels in Doppler flow testing
5.Movie practical effect and children's lay putty or slime when combined with borax
6.As a mold release because materials such as epoxy do not stick to it
7.As fiber reinforcement in concrete
8.As a surfactant for the formation of polymer encapsulated nanobeads
9.Used with polyvinyl acetate to make Elmer's glue
10.Used in eye drops and hard contact lens solution as a lubricant
11.Used in protective chemical-resistant gloves
12.Used as a fixative for specimen collection,solution as a lubricant
13.When doped with iodine, PVA can be used to polarize light
14.As an embolization agent in medical process
15.PVA 17-99(L) 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.
16.PVA 17-99(H is mainly used to produce textile sizing materials, coatings,adhesive, acetal derivations, and it is extensively applied to paper processings, emulgents, dispersants and blockingcolloids. In addition, it can be used as membranes, soil modifiers and production materials of vinylon fiber.
17.PVA1788is chiefly used for coatings,adhesive,dispersing agents, emulgents,textile sizing materials,sensitize coatings
and so forth.