EN
Polyvinyl Alcohol (PVA) -Wanwei
Description
Overview
Anhui Wanwei High-tech Materials Co., Ltd. produces "Wanwei" brand polyvinyl alcohol (PVA) series products by using advanced technology and technology, one is vinyl acetate produced by calcium carbide acetylene method and petroleum ethylene method as raw material, the other is ethylene produced by biological alcohol as raw material, methanol as solvent, peroxide as initiator, through polymerization, alcoholysis and other processes.
Product Details
Chemical Name: Polyvinyl Alcohol(PVA)
Molecular Formula: -[CH2CH(OH)]n
Physical properties:
Appearance is white flake, granular or powdery solid (low alkali alcoholysis process) or white flocculent solid (high alkali alcoholysis process). Specific gravity: 1.19-1.31 g/cm3, flake PVA filling specific gravity: 0.42-0.52 g/cm3, flocculent filling specific gravity: 0.20-0.27 g/cm3.
Chemical properties:
Water-soluble: PVA molecules are easily soluble in water because they contain a large number of hydroxyl groups. Its solubility increases with the increase of water temperature, only expands in cold water (low alcoholysis products can slowly dissolve in normal temperature water), and can be completely dissolved in hot water. Its aqueous solution has good film-forming and cohesive properties.
Thermal stability: The product softens when heated, does not change significantly below 40℃, 160℃ for a long time heating will gradually color, decomposition occurs above 220℃, resulting in water, acetic acid, acetaldehyde and butenal.
Chemical resistance: The product is hardly affected by weak acid, weak base or organic solvent, and has high oil resistance.
Storage stability: Good product stability, long-term storage in the natural dry state does not mold, does not deteriorate, does not absorb moisture.
PVA is a polymer with secondary hydroxyl groups. The secondary hydroxyl group in PVA molecular formula has high reactivity, and can carry out typical chemical reactions similar to low molecular alcohol, such as esterification, etherification, acetalization, etc., and also react with many inorganic compounds and organic compounds. Non-toxic to humans and animals, naturally degradable, known as green products.
Product Summary
Item |
Hydrolysis (mol%) |
Viscosity (mpa.s) |
Volatile (%≤) |
Ash (%≤) |
PH (Value) |
03-88（L） |
85.0-90.0 |
2.5-3.5 |
≤7.0 |
≤0.7 |
5~7 |
03-97（L） |
95.0-99.0 |
3.0-4.0 |
≤7.0 |
≤0.7 |
5~7 |
04-88（L） |
85.0-90.0 |
3.5-4.5 |
≤7.0 |
≤0.7 |
5~7 |
04-99（L） |
98.0-99.8 |
3.5-4.5 |
≤7.0 |
≤0.7 |
5~7 |
05-88（L） |
85.0-90.0 |
4.5-6.5 |
≤7.0 |
≤0.7 |
5~7 |
05-99（L） |
98.0-99.8 |
4.5-7.0 |
≤7.0 |
≤0.7 |
5~7 |
08-88（L） |
85.0-90.0 |
6.5-8.0 |
≤7.0 |
≤0.7 |
5~7 |
08-99（L） |
98.0-99.8 |
7.0-9.0 |
≤7.0 |
≤0.7 |
5~7 |
10-88（L） |
85.0-90.0 |
8.0-11.0 |
≤7.0 |
≤0.7 |
5~7 |
10-99（L） |
98.0-99.8 |
8.0-12.0 |
≤7.0 |
≤0.7 |
5~7 |
13-88（L） |
86.0-90.0 |
11.0-14.0 |
≤7.0 |
≤0.7 |
5~7 |
14-92（L） |
90.0-94.0 |
13.0-17.0 |
≤7.0 |
≤0.7 |
5~7 |
15-99（L） |
98.0-99.8 |
13.0-18.0 |
≤7.0 |
≤0.7 |
5~7 |
17-88（L） |
85.0-90.0 |
20.0-28.0 |
≤7.0 |
≤0.7 |
5~7 |
17-92（L） |
90.0-94.0 |
20.0-28.0 |
≤7.0 |
≤0.7 |
5~7 |
17-98（L） |
97.0-99.0 |
24.0-32.0 |
≤7.0 |
≤0.7 |
5~7 |
17-99（L） |
99.0-100.0 |
22.0-32.0 |
≤7.0 |
≤0.5 |
5~7 |
20-88（L） |
85.0-90.0 |
28.0-40.0 |
≤7.0 |
≤0.5 |
5~7 |
20-92（L） |
90.0-94.0 |
29.0-40.0 |
≤7.0 |
≤0.7 |
5~7 |
20-99（L） |
99.0-100.0 |
35.0-48.0 |
≤7.0 |
≤0.7 |
5~7 |
24-88（L） |
85.0-90.0 |
43.0-58.0 |
≤7.0 |
≤0.7 |
5~7 |
24-99（L） |
99.0-100.0 |
65.0-85.0 |
≤7.0 |
≤1.0 |
5~7 |
26-99（L） |
99.0-100.0 |
85.0-100.0 |
≤7.0 |
≤0.7 |
5~7 |
17-99（H） |
99.0-100.0 |
20.0-26.0 |
≤8.0 |
≤2.8 |
7~10 |
19-99（H） |
99.0-100.0 |
26.0-34.0 |
≤8.0 |
≤2.8 |
7~10 |
20-99（H） |
99.0-100.0 |
34.0-42.0 |
≤8.0 |
≤2.8 |
7~10 |
23-99（H） |
99.0-100.0 |
42.0-55.0 |
≤6.5 |
≤2.5 |
7~10 |
22-99（H） |
99.0-100.0 |
42.0-55.0 |
≤8.0 |
≤2.8 |
7~10 |
24-99（H） |
99.0-100.0 |
55.0-65.0 |
≤8.0 |
≤2.8 |
7~10 |
Product Application
Adhesive
Polyvinyl alcohol in adhesives has become a multi-scenario bonding solution through the three-in-one mechanism of "polar adhesion-film enhancement-chemical modification". Its core value lies in safety and environmental protection, broad-spectrum bonding, and easy modification, and it is especially suitable for cellulose substrates.
Coating
Polyvinyl alcohol has become a "performance bridge" in the coating system through the four mechanisms of film-forming reinforcement, interface bonding, construction optimization and functional modification. Its core value lies in the balance of rigidity and flexibility (improving the crack resistance and adhesion of the coating), water-air regulation (considering both waterproof and breathable requirements), and environmental protection and economy (non-toxic, biodegradable, and reducing the amount of emulsion). The selection needs to be combined with the application scenario.
Paper Processing
In paper processing, polyvinyl alcohol becomes a multifunctional additive that improves the comprehensive performance of paper through the three-in-one mechanism of "surface film formation-pigment bonding-fiber reinforcement". It has great advantages in terms of strength, printability, water resistance and environmental protection, and is especially irreplaceable in high-end paper and specialty paper.
Warp Yarn Sizing
Polyvinyl alcohol is used as a sizing agent to enhance yarn strength and abrasion resistance, reduce yarn breakage rate during weaving, and improve textile quality.
Packages
20 kg/bag, 25 kg/bag.
