Elvanol 80-18

In the modern field of fine chemicals, polyvinyl alcohol (PVA), as a versatile water-soluble polymer, is widely used in various industries such as papermaking, textiles, adhesives, and packaging materials. Among the many PVA products, the ELVANOL series, with its unique production process and excellent physicochemical properties, has become a high-performance benchmark in industrial applications.   1. Core Technological Advantages and Physicochemical Characteristics of ELVANOL The primary reason for ELVANOL's high market recognition lies in its unique particle morphology and molecular structure design. This special production process significantly improves efficiency in practical operations.     ♠ Excellent Solubility and Energy-Saving Benefits Traditional polyvinyl alcohol often requires high temperatures and long stirring times during the dissolution process, which not only increases energy consumption but also limits its application in some continuous production lines. A major technological breakthrough of ELVANOL is its ability to dissolve simultaneously in the continuous cooking process of starch. For the papermaking and textile industries, this means that PVA can be directly mixed and processed with starch, eliminating the need for separate dissolution tanks or complex pre-treatment processes. From a physical perspective, this improved water solubility directly translates into reduced production costs. The significantly shortened dissolution time improves the turnover rate of production equipment and significantly reduces the thermal energy consumption during the heating process. For large manufacturing enterprises pursuing ultimate cost control, this characteristic of ELVANOL has extremely high economic value. ♠ Precise Viscosity and Degree of Hydrolysis Control The ELVANOL series offers a variety of grades to meet different process requirements. For example, the Elvanol 71-30 grade has a viscosity range of 28.5-32.5 cP in a 4 wt% aqueous solution, while the Elvanol 90-50 grade is controlled at 12.0-15.0 cP. All mainstream grades (such as Elvanol 71-30 and Elvanol 80-18) have a degree of hydrolysis of 99.5%. This high degree of hydrolysis means that the molecular chain contains a very high proportion of hydroxyl groups, ensuring its excellent film-forming properties and extremely high adhesive strength. Meanwhile, its pH value remains stable between 5.0 and 7.0, exhibiting weak acidity to neutrality, and it possesses excellent chemical stability with most inorganic fillers and substrates. ♠ Synergistic Reinforcement Effect with Inorganic Materials In compression molding or composite material manufacturing, ELVANOL demonstrates excellent mixing uniformity. It can form stable reinforced mixtures with fine powdered inorganic fillers. During the molding process, this uniformity prevents localized stress concentration, improving the structural integrity and surface finish of the final product.   2. Key Application Areas: From Paper Coating to Textile Warp Sizing ELVANOL's application range covers multiple fields, from high-end adhesives to precision photosensitive coatings, with particularly outstanding performance in the paper and textile industries. ♣ Performance Multiplier in the Paper Industry In paper coating applications, ELVANOL is typically used as a co-binder mixed with starch. Due to its excellent barrier properties, it effectively improves the paper's resistance to oil, grease, and oxygen. More importantly, ELVANOL's solubility in continuous cooking processes allows paper mills to simplify the coating preparation process. Through synergistic interaction with starch, it significantly enhances the surface strength of the paper, reducing dusting and linting during the printing process, making it particularly suitable for the production of high-end art paper and packaging cardboard. The T-Series Revolution in the Textile Industry: The Preferred Choice for Polyester/Cotton Blends For the textile industry, ELVANOL has specially developed the T-series (such as Elvanol T-25) of unique copolymers. This series is designed specifically for polyester/cotton blends and other warp sizing applications. A major challenge in textile processing is "desizing." Traditional sizing agents often require large amounts of chemical reagents during the desizing process, and the results are often unsatisfactory. The unique feature of the ELVANOL T-series is its stronger water solubility under alkaline conditions. In the finishing stage, the fabric only needs to be treated in a standard alkaline bath to achieve rapid and thorough desizing. This not only improves the dyeing uniformity of the fabric but also reduces chemical damage to the fibers. Diverse Industrial Applications Besides its two main pillar industries, ELVANOL also plays an irreplaceable role in the following areas: Adhesives:  With its high bonding strength and film-forming properties, it is used for bonding wood, paper, and porous materials. Ceramic Industry: As a green body binder, it improves the strength of molded green bodies. Photosensitive Coatings: Utilizing its high purity and low ash content (Na2O less than 0.35%-0.5%), it is used in precision electronic chemicals. Molding: Provides a more uniform molding effect, suitable for the manufacture of complex-shaped parts.   3. Environmental Attributes and Sustainable Development of Future Industries Under today's stringent global environmental regulations and carbon neutrality goals, the environmental attributes of materials have become a core criterion for corporate procurement. ELVANOL was designed with environmental compatibility in mind from the outset. ♥ Biodegradable and Environmentally Harmless ELVANOL is a polymer that poses no health hazards. In specific industrial wastewater treatment environments, it can be decomposed by microorganisms into carbon dioxide and water, greatly reducing the pressure on wastewater treatment systems. Compared to many synthetic plastic slurries, its biodegradability makes it a preferred material for green textiles and environmentally friendly packaging. ♥ Resource Recycling and Circular Economy In the textile industry, the recycling of sizing agents is an important means of reducing costs and pollution. ELVANOL copolymers exhibit strong performance stability during recycling, and their film-forming and bonding properties do not significantly degrade even after multiple cycles. This makes it one of the most economical textile sizing agents on the market that meets environmental requirements. ♥ Indirect Environmental Benefits from Low Ash Content and High Purity The volatile content of ELVANOL is consistently controlled below 5.0%. This high solid content and low impurity (low ash content) characteristic means that very few harmful gases and residual inorganic salts are released during the processing and heat treatment of the final product. This not only protects the precision of production equipment but also reduces the burden of exhaust gas treatment. ♥ Compliant with Sustainable Development Strategies As consumer demand for sustainable products grows, companies using ELVANOL as a raw material can more easily obtain relevant environmental certifications. Whether in reducing production energy consumption or in the end-of-life treatment of products, ELVANOL demonstrates a forward-thinking industrial mindset: achieving a win-win situation between production efficiency and ecological balance through technological innovation.   The ELVANOL series of polyvinyl alcohol is not only a chemical raw material but also a mature industrial solution. Through special molecular design, it solves technical challenges such as dissolution efficiency, application strength, and alkaline desizing, while its biodegradable and recyclable properties address the contemporary demand for environmental protection.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

1. Mechanism of Elvanol in Paper Surface Treatment In the modern paper industry, surface treatment has become an important means of increasing the added value of paper. Printability, surface strength, and barrier properties against oils and solvents all highly depend on the material selection of the surface sizing or coating system. Elvanol polyvinyl alcohol, as a high-performance water-based film-forming material, is widely used in paper surface treatment.     Elvanol is a fully or highly hydrolyzed polyvinyl alcohol with excellent film-forming ability. Its regular molecular chain structure allows it to form a continuous and dense film during drying, significantly improving the surface strength and barrier properties of the paper. Compared to using starch alone, the film formed by Elvanol is tougher, has stronger chemical resistance to oils, waxes, and solvents, and exhibits higher water resistance.   Using Elvanol in the sizing press or calendering stage can significantly improve the paper's resistance to linting, dusting, and cracking. Even at low addition levels (approximately 10% solids content), it can achieve surface strength and folding strength superior to traditional starch systems. This characteristic makes it particularly suitable for high-filler paper, recycled fiber paper, and paper types requiring high printability.   In addition, Elvanol has good compatibility and can coexist stably with modified starch, CMC, alginates, wax emulsions, and common papermaking additives, providing greater flexibility for papermaking process adjustments.   2. Application Advantages of Elvanol in Improving Barrier, Strength, and Printing Performance ♣ Surface Barrier Properties Elvanol is one of the most powerful water-based barrier film-forming materials in the paper industry. The film it forms has a natural barrier effect against oils, greases, and organic solvents, and is therefore often used in applications such as greaseproof paper, oil-resistant packaging paper, and copier paper. In oil-resistant systems, Elvanol can also serve as an effective carrier for fluorochemicals, improving the stability and efficiency of the overall barrier system.   ♣ Surface Strength and Structural Stability Compared to starch-sized paper, paper treated with Elvanol exhibits superior resistance to surface abrasion, cracking, and linting. Its high bonding strength effectively binds fibers and fine surface particles, reducing linting and dusting, thereby lowering the frequency of blanket contamination and downtime for cleaning during printing. This advantage is particularly evident in high-speed offset printing and high-precision printing. At the same time, Elvanol allows for a higher proportion of fillers or recycled fibers while maintaining strength, helping paper mills control costs while maintaining paper performance.   ♣  Printability and Coating Suitability Elvanol-treated paper surfaces are smoother and have excellent ink holdout. Due to its oil and solvent resistance, ink does not easily penetrate the paper base, resulting in higher print gloss and image clarity. In pigment sizing systems, Elvanol, as a binder, exhibits significantly stronger binding power than acrylic emulsions, styrene-butadiene latex, casein, and starch, and can replace traditional binders at certain ratios, optimizing the pigment/binder ratio.   3. Typical Elvanol Grades and Application Characteristics in Papermaking Based on different paper types and process requirements, we offer a variety of product grades with different viscosities and structures. The following are commonly used grades in the papermaking industry and their application characteristics: Grade Polymer Type Viscosity Level Key Functions Typical Uses Elvanol 71-30 Fully hydrolyzed PVOH Medium Film forming, binding, grease resistance Surface sizing; FWA carrier; lint and dust control; grease-resistant papers Elvanol 80-18 Fully hydrolyzed PVOH Medium Grease barrier, high solids stability Grease-proof packaging papers; high-solids sizing and coating Elvanol 75-15 Fully hydrolyzed PVOH Medium–Low Binder reinforcement Starch reinforcement; lint reduction; high-solids sizing and coating   In optical brightening systems, Elvanol acts as a carrier for fluorescent whitening agents (FWAs), significantly improving whitening efficiency. Adding Elvanol at 0.5–2.5% of the pigment weight in pigment systems results in significantly better whitening effects than using FWA alone, while also reducing the amount of traditional carriers such as starch and casein.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com