I. Introduction to ANHUI LIWEI CHEMICAL Adhesives: Polyvinyl Alcohol Products
- Polyvinyl alcohol possesses the following characteristics, making it widely used in adhesives and binders:
- Excellent adhesion
- When used in combination with fillers, it increases initial tack and drying speed
- Excellent oil resistance
- Outstanding film strength
- Long-lasting and stable performance
II. Applications of Polyvinyl Alcohol in ANHUI LIWEI CHEMICAL Adhesives
Typical Uses as Adhesives and Bonding Agents
| Product Type | Specific Applications | Recommended Polyvinyl Alcohol Grades |
|---|---|---|
| Common adhesives | Paper processing (paper bag manufacturing, paper bags, paper pasting) | 100-70、100-27、098-27、088-35、088-20 |
| Construction adhesives | Construction adhesives, mortars, putty adhesives, and tile adhesives. | 100-78、098-60、100-27 |
| Re-wet adhesives | Stamps, wallpaper, labels | 088-20、088-05、088-50 |
| Modified adhesives | Plywood adhesive (urea melamine resin) | 088-20、100-27、094-27 |
| Civil engineering / building mixture | Cement, mortar, gypsum board, plaster | 088-20、088-35 |
| Inorganic adhesives | Ferritic, zirconium, alumina ceramics, white porcelain, refractory bricks, agricultural chemicals, compost and compound fertilizers | 100-27、088-20、088-05 |
| Special products | Pharmaceuticals (tablets and medical heating materials) metal surface treatment, synthetic leather | 088-20、088-05、080-05 |
III. Instructions for Use of ANHUI LIWEI CHEMICAL Adhesives with Polyvinyl Alcohol
a. All polyvinyl alcohol resin series products can be dissolved in hot water below 95℃. When dissolving, slowly add the product to cold water at approximately 20℃ while stirring to allow for full swelling, dispersion, and release of volatile substances (do not add the product directly to water above 40℃ to avoid blistering and internal seepage). Then, raise the temperature to approximately 95℃ to accelerate dissolution and maintain this temperature for 2–2.5 hours until the solution no longer contains small particles. Stir at 70–100 rpm. Heating can be achieved using indirect heating methods such as jacketing or water baths, or direct steam heating; however, do not use an open flame to avoid localized overheating and decomposition. If a stirrer is unavailable, steam can be blown tangentially to dissolve the product.
b. The concentration of aqueous solutions of polyvinyl alcohol resin series products is generally below 12-14%; the concentration of aqueous solutions of low-hydrolysis polyvinyl alcohol resin products is generally around 20%.
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