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PVA products have a wide range of uses. In the textile industry, they are mainly used as yarn pulp, fabric finishing agents, and raw materials of vinylon fibers; in the construction and decoration industries, they can be used as mortar cement additives, paint additives for the interior and exterior walls, and molding plate adhesives; in the chemical industry, they can be used as polymerization emulsifiers, dispersants, and raw materials for the production of PVF, acetalal and butyral resins; in lumbering and paper-making industries, they can be used as adhesives; in agriculture, they can be used as soil improvers, pesticide adhesion synergist and PVA film; in petroleum exploitation, they can be used as well-cementing agents. In addition, they can also be used in cosmetics, pharmaceuticals, printing, ceramics, steel, electronics, electroplating, and so on.

Physical Properties of HOPE WAY PVA

■ Appearance:White to ivory granule or powder

■ Specific Gravity: 1.23~1.31

■ Bulk Density: 0.5~0.7g/ml

■ Storage Stability: Indefinitein dry storage

■ Refractive Index at 20°C: 1.52~1.55(anhydrous polymer)

■ Specific Heat: 1.65~1.67J/g°C( 0.4 cal/g°C)

■ Heat of Combustion: 5.9kcal/g

■ Mean Coefficient of ThermalExpansion: 7~10*10-5/°C

■ Glass Transition Temperature: 60°C(HWPtype)~85°C(HWFtype)

■ Melting Point: 180~190°C(HWP type),230°C(HWFtype)

■ Heat Sealing Temperature( dry,unplasticized): 165-210°C

■ Compression-Molding Temperature(plasticized): 100-150°C

■ Heat Stability: Thecolor turns yellowish gradually when heated above 100°C, turns dark rapidlyabove 160°C.Decomposes above 200-220°C.

■ Flammability: Burn atabout the rate of paper.

■ Light Stability: Excellent

■ Effect of Strong Acids: Dissolvesor decomposes

■ Effect of Strong Alkalies: Softens or dissolves

■ Effect of Weak Acids: Softensor dissolves

■ Effect of Weak Alkalies: Softensor dissolves

■ Effect of Organic Solvents: Resistantto most solvent

■ Gas Permeability: Effectivelyresist permeation of gases such as oxygen, nitrogen, and carbon dioxide.

■ Hygroscopicity: Lesssensitive to humidity than other water-soluble resins.

■ Toxicity: Non-toxic tohuman and animal.

Packing and Storage of HOPE WAY PVA

Packing : Paper-plastic package with plastic film.

N.W.: 20kg/bag or 25kg/bag ( according to customers’ request ).

Storage: Store the products in dry, well-ventilated rooms, and pay attention to preventing them from damp and avoid exposing them to sunlight and rain.

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