Polyvinyl Alcohol (PVA) plays a pivotal role in various industries, including adhesives, papermaking, and coatings. Within the global PVA market, Kuraray has consistently maintained a leading position. If you are seeking technical references regarding Kuraray PVA, this article—drawing upon the company's official application guidelines—will outline its core product characteristics, dissolution methods, and the applications of its key grades.
1. What is Kuraray PVA? What are its Core Advantages?
Kuraray PVA (Polyvinyl Alcohol) is a white, granular or powdery, water-soluble polymer material. Combining both eco-friendliness and functionality, it finds extensive application in industrial manufacturing.
Its core advantages are primarily reflected in the following aspects:
Excellent Water Solubility: Easily dissolves in water, making it convenient to use.
Strong Film-Forming Properties: Forms films characterized by high tensile strength and excellent abrasion resistance.
Outstanding Adhesion: Suitable for use in adhesives, emulsion stabilizers, and related fields.
Oil and Chemical Resistance: Exhibits good tolerance toward weak acids, weak bases, and oils/greases.
Significant Environmental Advantages: Biodegradable and produces minimal residue upon combustion.
2. Kuraray PVA Product Classification and Representative Grades
Fully Hydrolysis PVA
| Grade | Viscosity | Degree of Hydrolysis | Non-volatiles (%) | Ash Content (%) [Na2O (NaOAc)] | PH |
| KURARAY POVAL 3-98 | 3.2 - 3.8 | 98.0 - 99.0 | 97.0 ± 3.0 | ≤ 0.6 (1.58) | 5.0 - 7.0 |
| KURARAY POVAL 5-98 | 5.2 - 6.0 | 98.0 - 99.0 | 97.0 ± 3.0 | ≤ 0.6 (1.58) | 5.0 - 7.0 |
| KURARAY POVAL 28-98 | 25.0 - 31.0 | 98.0 - 99.0 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
| KURARAY POVAL 60-98 | 54.0 - 66.0 | 98.0 - 99.0 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
Intermediate Hydrolysis PVA
| Grade | Viscosity | Degree of Hydrolysis | Non-volatiles (%) | Ash Content (%) [Na2O (NaOAc)] | PH |
| KURARAY POVAL 17-94 | 14.5 - 18.5 | 92.5 - 94.5 | 97.5 ± 2.5 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
| KURARAY POVAL 27-96 | 24.0 - 30.0 | 95.5 - 96.5 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
Partially Hydrolysis PVA
| Grade | Viscosity | Degree of Hydrolysis | Non-volatiles (%) | Ash Content (%) [Na2O (NaOAc)] | PH |
| KURARAY POVAL 3-88 | 3.2 - 3.6 | 87.0 - 89.0 | 97.5 ± 2.5 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
| KURARAY POVAL 5-88 | 4.6 - 5.4 | 86.5 - 89.0 | 97.5 ± 2.5 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
| KURARAY POVAL 22-88 | 20.5 - 24.5 | 87.0 - 89.0 | 97.5 ± 2.5 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
| KURARAY POVAL 30-88 | 27.0 - 33.0 | 87.0 - 89.0 | 97.5 ± 2.5 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
| KURARAY POVAL 44-88 | 40.0 - 48.0 | 87.0 - 89.0 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
| KURARAY POVAL 95-88 | 80.0 - 110.0 | 87.0 - 89.0 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
Low-Hydrolysis PVA
| Grade | Viscosity | Degree of Hydrolysis | Non-volatiles (%) | Ash Content (%) [Na2O (NaOAc)] | PH |
| KURARAY POVAL 3-80 | 2.8 - 3.3 | 78.5 - 81.5 | 97.5 ± 2.5 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
| KURARAY POVAL 32-80 | 29.0 - 35.0 | 79.0 - 81.0 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
| KURARAY POVAL 35-80 | 32.0 - 38.0 | 79.0 - 81.0 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | 5.0 - 7.0 |
| KURARAY POVAL 48-80 | 45.0 - 51.0 | 78.5 - 80.5 | 97.25 ± 2.75 | ≤ 0.4 (1.06) | No spec |
| KURARAY POVAL 5-74 | 4.2 - 5.0 | 72.5 - 74.5 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | No spec |
EXCEVAL
| Grade | Viscosity | Degree of Hydrolysis | Non-volatiles (%) | Ash Content (%) [Na2O (NaOAc)] | PH |
| EXCEVAL AQ-4104 | 3.5 - 4.5 | 97.5 - 99 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | No spec |
| EXCEVAL HR-3010 | 12.0 - 16.0 | 99.0 - 99.4 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | No spec |
| EXCEVAL RS-2117 | 25.0 - 30.0 | 97.5 - 99.0 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | No spec |
| EXCEVAL RS-1717 | 23.0 - 30.0 | 92.0 - 94.0 | 97.0 ± 3.0 | ≤ 0.4 (1.06) | No spec |
3. Analysis of Common Industrial Applications for Kuraray PVA
Adhesives Industry
Used in white glues, paper tube adhesives, woodworking glues, and construction adhesives to enhance initial tack and film strength.
Textile Industry
Used for warp sizing to improve yarn abrasion resistance and reduce yarn breakage rates.
Papermaking Industry
Used for paper surface sizing and specialty paper processing to enhance paper stiffness and printability.
Packaging Film Industry
High-end grades, such as EXCEVAL, possess excellent oxygen barrier properties, making them suitable for food packaging films.
Ceramics and Electronic Materials
Used for bonding ceramic green bodies and dispersing electronic pastes; serves as a crucial auxiliary agent in precision manufacturing.
Website: www.elephchem.com
whatsapp: (+)86 13851435272
E-mail: admin@elephchem.com
Поддерживается сеть IPv6
