Classification: Chemical Auxiliary Agent
CAS No.: 9002-89-5
Other Names: PVA;PVOH;PVAL
MF: C2H4O
EINECS No.: 209-183-3
Purity: 99% min
Place of Origin: China
Type: chemical auxiliary agent
China supplier Shuangxin PVA WANWEI PVOH Polyvinyl Alcohol Pva PVAL 24-88A Powder
Shuangxin PVA, White or slightly yellow granules or powder, it is a water-soluble and environmentally friendly polymer with a wide range of uses. Its performance is between plastic and rubber.
Properties:
(1) Solubility: It has strong hydrophilicity and is easily soluble in water (it can be slowly dissolved at room temperature, generally dissolved in hot water above 85°C), and insoluble in almost all organic solvents. PVA-2088 will produce foam during the dissolution process, which can be solved by adding defoamer.
(2) Film-forming: easy to form a film, and its film has excellent mechanical properties. Except for H2O, the PVA film has excellent barrier properties to H2, N2, O2 and other gases.
(3) Adhesion: It not only has good adhesion with hydrophilic fibers, paper, etc., but also has good adhesion with hydrophobic fibers.
(4) Thermal stability: When the sheet is heated to above 130°C, the appearance changes gradually. The partially alcoholyzed PVA begins to melt at around 180-190 °C and decomposes at 200 °C.
(5) Solvent resistance: PVA has strong resistance to weak acid and weak alkali, and has good oil resistance.
TESTED ITEM | UNIT | QUANLITY DATE | TESTED RESULT | |
ALCOHOLYSIS DEGREE | % MOL/MOL | 86.0-89.0 | 88.05 | |
VISCOSITY | MPA·S | 42.0-52.0 | 46.50 | |
SODIUM ACETATE | % | MAX | 2.5 max | 0.80 |
VOLATILES | % | MAX | 5.0 max | 3.10 |
ASH | % | MAX | 0.5max | 0.27 |
PH VALUE | 5-7 | 5.60 | ||
CONCLUSION | QUALIFIED | |||
Application:
(1) Fiber processing industry: spun yarn, long yarn and post-processing.
(2) Film processing industry: use different processes to produce water-soluble films and other fields.
(3) Coating mold industry: the fields of base fabric shaping and strengthening.
(4) Paper processing industry: indicating sizing and other fields.
(5) Adhesive industry: re-wet bonding and other fields.
(6) Stabilizer industry: vinyl acetate emulsion polymerization and other fields.
(7) Others: cosmetics, pharmaceuticals, additives for building materials, temporary protective films, etc.
Advantage:It has good water solubility, adhesion, film flexibility, smoothness, oil resistance, solvent resistance, protective colloid, gas barrier, abrasion resistance and thermal stability.
Package: 20Kg/bag, 25KG/bag
Storage: Stored under normal temperature, pay attention not to get wet.
