PVOH manufacturer

1 PVA (PVA 088-20 & PVA 1788) water resistance modification PVA (Polyvinyl alcohol) has very low air permeability and is a high-barrier packaging material with excellent performance. Because the molecular chain contains a large number of hydroxyl groups and has high hydrophilicity, these hydroxyl groups are easy to form hydrogen bonds with water molecules under high humidity, resulting in changes in the aggregate structure of PVA, causing its barrier properties to drop sharply. Therefore, necessary water resistance modification should be carried out on PVA to reduce the effect of humidity on the barrier properties of PVA. The mechanism of PVA water resistance modification is to cross-link PVA by adding a cross-linking agent, and completely or partially block the hydroxyl groups, which can reduce its hydrophilicity and achieve the purpose of improving water resistance. The 8511 Institute of the China Aerospace Corporation has developed a melamine resin modified liquid "868" that has no toxic side effects on the human body. "868" is a multifunctional polycondensate. When the amount added is not large, it can moderately cross-link with the hydroxyl groups in PVA, so that PVA forms a strong three-dimensional structure coating, which determines the air tightness of PVA under wet conditions and improves water resistance. This modified PVA coating liquid will not form a skin at room temperature, will not swell or fall off when in contact with water, and can be used for glue preparation and coating at room temperature.   2 PVA (PVA 100-27 & PVA 1799)water-soluble modification PVA's water solubility can be used to make water-soluble films. Water-soluble films are a new type of green and environmentally friendly packaging material, which is widely used in the packaging of various products in Europe, America, Japan and other countries. For example, pesticides, fertilizers, pigments, detergents, water treatment agents, concrete additives, detergents, chemical reagents for photography and chemical reagents for gardening care. Because the water solubility of pure PVA film cannot meet the requirement of dissolution time ≤ 300s in water at 20℃, Wen Huojiang et al. carried out Michael addition reaction with PVA and acrylamide, and then hydrolyzed and synthesized modified PVA under base catalysis. Water-soluble anionic groups were introduced into the PVA molecular chain to enhance the solubility. Water-soluble films were prepared using this as raw material, and the relationship between the amount of alkali, acrylamide and modification rate was discussed. The modification rate made a great contribution to the low-temperature rapid solubility of the prepared film within a certain range. The effect on water solubility beyond a certain range was not significant, but it would lead to excessively high costs.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

The US International Trade Commission determined, in accordance with the Tariff Act of 1930, that the revocation of the anti-dumping duty order on certain Polyvinyl Alcohol (PVA) originating in China, Japan and South Korea imported into the United States may cause substantial damage to the US industry. In 2002, Celanese and DuPont launched anti-dumping investigations against the above countries. In 2003, the ITC decided that Japanese imports were a risk for injury, but they left out Germany. They also excluded China's Sichuan Weiye Company because it didn't meet the required standards at the time. On the other hand, they found that Shanghai Volkswagen was indeed dumping. In July and October 2003, the United States officially imposed anti-dumping duties on PVA from China, Japan and South Korea.     ITC clearly defined the "domestic similar products" of polyvinyl alcohol (PVA) in the review. According to the Tariff Act, similar products refer to products that are similar or most similar to the investigated goods in terms of characteristics and uses. The Ministry of Commerce has limited the scope of the investigation to PVA with a degree of hydrolysis exceeding 80%, while excluding 15 specific forms of PVA.   PVA is a water-soluble synthetic polymer in the form of white particles or powders, and its properties are mainly determined by the degree of hydrolysis, viscosity and molecular weight. In terms of production process, PVA is produced by hydrolysis of vinyl acetate monomers under the action of a catalyst after polymerization. In the USA, PVA is captively consumed or sold to end users primarily as an intermediate in the production of PVB, which is a plastic laminate used as an adhesive between panes of automotive safety glass or load-resistant architectural glass.  PVA is also sold to end users (and occasionally to distributors) for use in the textile and paper industries in sizing formulations(such as PVA 098-08 & PVA 1099); as a binder in adhesive and soil binding formulations（such as PVA 088-20 & PVA 1788); and as an emulsion or polymerization aid in colloidal suspensions, water-soluble films, cosmetics, and joint compounds (such as KURARAY POVAL 17-94).    Although different grades of PVA have differences in specific applications, the committee believes that all PVAs with a degree of hydrolysis exceeding 80% should be considered as the same type of product. This decision is based on three main points: first, all types of PVA share the same basic chemical makeup; second, different grades of PVA can be swapped for each other in many cases; and third, the way they are made and the materials used are pretty similar. It's important to note that while end users tend to stick to one specific grade of PVA to keep costs down, this habit doesn't change the fact that the product itself is quite uniform.   In this review, the Commission stuck with the product definition from the original investigation for two reasons: major manufacturers like Celanese and DuPont agreed with it, and the market hasn’t changed much since then. This decision also continues the Commission's position in the original investigation, that is, not to classify PVB-grade PVA into different product categories.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

We used partially alcoholysis PVA-217SB (PVA080-22 & PVA1780) and high-efficiency environmentally friendly pulp together, and added a certain proportion of starch. We conducted experiments on several polyester-cotton varieties, which not only significantly improved the pulp shaft quality, but also greatly reduced the pulp cost.   Pulp performance: The chemical structure of PVA varies depending on the degree of alcoholysis. PVA with an alcoholysis degree of 99.6% is fully alcoholysis, like the PVA-1799 (PVA 100-27) we usually work with. On the other hand, PVA with an alcoholysis degree of 88% is partially alcoholysis, such as PVA-1788 (PVA 088-20) and PVA-217SB. The fully alcoholysis PVA mainly has hydroxyl groups in its structure, whereas the partially alcoholysis version contains some ester groups along with hydroxyl groups. This difference makes their performance quite distinct. For example, when mixing partially hydrolyzed PVA with completely hydrolyzed PVA and starch, the starch ratios needed aren't too different between the two. Generally, it should not exceed 70%, that is, the starch to PVA mixing ratio is generally about 7:3, in order to obtain a slurry with good miscibility. Runli's eco-friendly slurry is a milky white liquid that has over 98% effective ingredients. It has a viscosity of 2 to 8 mPa·s at 20℃ and a pH level between 7.5 and 8.5. This slurry flows well, has good elasticity, strong adhesion, mixes easily with other slurries and additives, and it's simple to remove after use.     Summary: (1) From the trial, tracking, and test analysis of Runli slurry and partially hydrolyzed PVA, we found that the slurry flow rate is stable and it is not easy to form sizing skin at low temperature. The thousandth reel is smooth, the sizing yarn feels smooth, and there is less regenerated hairiness. (2) The new sizing yarn indicators are way better than the old formula. We’ve seen a big drop in loom breakage and a solid increase in the good axis rate and loom efficiency. (3) The use of Runli sizing agent and partially alcoholysis PVA (PVA-217SB) sizing agent has greatly reduced the sizing cost.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com  

Polyvinyl alcohol (PVA) is an important chemical raw material, used to make polyvinyl acetal, gasoline-resistant pipes and vinylon synthetic fibers, fabric treatment agents, emulsifiers, paper coatings, adhesives, glues, etc.     Different grades Polyvinyl alcohol is obtained by hydrolysis of polyvinyl acetate, but not directly by polymerization of vinyl alcohol. Because vinyl alcohol is extremely unstable, it is impossible to have free vinyl alcohol monomers.   Different degree of polymerization There are generally three kinds of alcoholysis degree, namely 78%, 88%, and 98%. Completely hydrolyzed polyvinyl alcohol is obtained by hydrolyzing polyvinyl acetate with a degree of hydrolysis of 98% to 100%. The degree of hydrolysis of partially hydrolyzed polyvinyl alcohol is generally 87% to 89%. To keep things simple, the numbers for polymerization are usually listed first, followed by the percentage of hydrolysis. So, PVA-1788 (Poval 217) means it has a polymerization degree of 1700 and a hydrolysis degree of 88%.   Different water solubility PVA-1788 is well soluble in water and can be quickly dissolved in cold water or in boiling water. The viscosity of PVA-2488 (Mowiol 47-88) is 1.5-2 times that of 1788 (different manufacturers' grades). The dissolution process of 2488 is longer than that of 1788, and its tensile force after dissolution is greater than that of 1788.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com  

With the continuous development of science and technology, PVA (polyvinyl alcohol) is an important polymer compound and is widely used in various fields. In the market, PVA has many different models, and there are certain differences and characteristics between them. Next, we will introduce the differences and application scenarios of various PVA models in detail.   Let's discuss one of the common PVA models-PVA-1788. PVA-1788 has a high degree of polymerization and alcoholysis, and its solubility is good. It can be used to prepare high-transparency hydrogel products. Due to its unique physical properties, PVA-1788 is widely used in the medical and health fields, such as making waveforms to simulate human tissue. PVA-1788 can also be used as a film-forming agent for electrolyte and nutrient sustained-release systems, and is used for soil improvement in the agricultural field.     Another common model is PVA-117. Compared with PVA-1788, PVA-117 has a lower degree of polymerization and a slightly higher degree of alcoholysis. This makes PVA-117 easier to dissolve in water, and has good adhesion and fluidity, making it widely used in the preparation of adhesives. Not only that, PVA-117 can also be used as a stabilizer for the preparation of iron oxide nanoparticles, as well as an emulsifier in coatings, etc.     There is also a special type of PVA, namely PVA-217. PVA-217 is characterized by a low gelation temperature, good thermal stability, and is widely used in the fiber field. In the textile industry, PVA-217 can be used for needle spinning to give the yarn a higher tensile force and lower breaking strength. PVA-217 can also be used as a cross-linking agent for cellulose fibers, playing an important role in the textile processing process.   In summary, PVA, as an important polymer compound, has different types of products to choose from in different application fields. PVA-1788 is suitable for medical and health and agricultural fields, while PVA-117 is widely used in adhesives and coatings, and PVA-217 is mainly used in the textile field.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

PVA (polyvinyl alcohol) is a white, powdery resin obtained by hydrolysis of polyvinyl acetate. Since my country began researching and producing it in the 1960s, its current output ranks first in the world. Polyvinyl alcohol film is great because it's really clear, lightweight, and can keep gases out. It's tough, won't tear easily, and can handle wear. Plus, it can dissolve in water and break down naturally under the right conditions. It is one of the new green materials that has developed rapidly in recent years.   At present, the high-barrier packaging materials on the market mainly include polyvinylidene chloride (PVDC), ethylene-vinyl alcohol copolymer (EVOH) and polyvinyl alcohol (PVA). Polyvinylidene chloride (PVDC) is mainly used in the coating process. PVDC has good oxygen and water vapor barrier properties, and the coating can be heat-sealed with low cost. However, PVDC because of the chloride ions in its structure, it cannot be recycled and reused. When the waste is incinerated, it will also produce hydrogen chloride, dioxins and other toxic and harmful substances to the human body and the surrounding environment. Europe and the United States have begun to restrict its use.     Ethylene-vinyl alcohol copolymer (EVOH) has excellent barrier properties and excellent processability. It has excellent transparency, gloss, mechanical strength, elasticity, wear resistance, cold resistance and surface strength. It only produces CO2 and H20 when incinerated, and is an excellent green and environmentally friendly packaging material. However, when the ambient temperature is relatively high, its barrier properties deteriorate sharply, so it is not suitable for use alone. It is mostly used in the production of multi-layer co-extruded films, such as EVOH five-layer co-extruded films, but most of the equipment relies on imports and is costly.   Polyvinyl alcohol (PVA,PVA 2688 & PVA 088-60) contains a large number of hydroxyl groups in its molecular structure and has hygroscopic energy. As the humidity increases, its gas barrier function decreases. It needs to be coated or plasticized in large quantities before it can be processed and formed. Therefore, the modified PVA coating film that has been hydrophobically modified is often used in the coating process. It has been widely used in the United States and Japan, and has begun to flourish in my country in recent years.   The continuous development and progress of society has prompted people to put forward more requirements and expectations for new materials that are safe, environmentally friendly, degradable and recyclable. The development of the technology of modified PVA coating film that has emerged will not stop. The booming plastic processing industry calls for the birth of new generations of new products. It can be expected that in the near future, as the technology of modified PVA coating film becomes more mature, its share in the structural grade and economic benefits of plastic packaging market products will become larger and larger.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com

Ultrafiltration membranes are super popular for separating different substances. You can find them in areas like oil processing, textiles, biopharmaceuticals, food production, wastewater treatment, and even making drinking water. Scientists are exploring ways to enhance these membranes so they can produce more water without compromising their filtering ability and also reduce pollution. To this end, many scholars are committed to developing new membrane materials and modifying membranes to improve their application effects. There are many methods to modify membrane materials, such as copolymerization, mixing and surface modification. Blending is simple and easy, making it a popular topic in membrane research. That's why many scientists in the field pay attention to it.   Polyvinyl alcohol (PVA 088-08 & PVA 1088)  has good film-forming properties and pollution resistance, and is widely used as a material for preparing hydrophilic membranes.PVA membranes have a tendency to swell and can even dissolve, so they often need some changes, like heat treatment or blending.    To make these membranes, we used materials like polyvinyl alcohol (PVA), cellulose acetate (CA), glacial acetic acid, metal chlorides, and water. We created blended ultrafiltration membranes using a method called phase inversion, adding metal chlorides like sodium chloride (NaCl), potassium chloride (KCl), and barium chloride (BaCl). We checked how the amount of these metal chlorides impacted the performance of the blended membranes.   Our results showed that when the mass fraction of NaCl and KCl doesn't go over 1% in the membrane solution, the modified blended membrane performs well in retaining substances. The pure water flow increases, while energy use stays pretty much the same. But, when the mass fraction goes above 1.5%, the water flow jumps significantly, but the retention rate drops. We found that about 1% is the best amount for the alkali metal chlorides, while for BaCl, around 1.5% works best. Under the same conditions, blending with KCl results in the highest water flow rate. After we changed the PVA-CA blended membrane with NaCl and KCl, it became more water-loving. But when we used BaCl, it got a bit less water-loving.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com  

The shift toward green packaging in the food industry is imperative.   Flexible packaging is becoming really important in the food industry. This product is safe for the environment and doesn’t contain any toxic materials. Unlike PVDC, it leaves no solvent residues and doesn’t release harmful gases when burned, so it’s a better choice for sustainability.   Under the same conditions, its oxygen barrier performance is 50 times higher than that of PVDC, effectively addressing many challenges in the packaging industry.   Polyvinyl alcohol (PVC Grade) coated film is a novel, eco-friendly, high-barrier packaging material that can replace PVDC in general food packaging applications while also meeting stricter environmental requirements in other packaging fields.   Differences Between PVOH High-Barrier Coated Film and K-Film     1. Structure: Self-adhesive, no primer required.        2. Performance:   Eco-friendly & Cost-Efficient: Low coating weight, no organic solvents used, no solvent emissions or residues. Superior Oxygen Barrier: Thinner coating, lower haze, higher transparency, and exceptional oxygen barrier performance. Higher Yield: It offers a bigger packaging area, about 15% more per roll than K-film of the same weight and width, which means you can pack more products. . Recyclability: The PVOH-coated film is both degradable and recyclable.   In summary, this eco-friendly PVOH (PVOH 552 & Aclotex B72) -coated film could fill a gap in the market. It can replace traditional PVDC in food packaging and meet the needs of industries focused on environmental issues. Plus, it effectively handles current sustainability challenges and provides good oxygen barriers for flexible food packaging.It's likely to take the place of a lot of metallized film packaging out there.   This new product is designed to tackle the ongoing issue of plastic waste in food packaging and support the move towards eco-friendly materials in China.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com    

Polyvinyl Alcohol (PVA) is a versatile and widely used water-soluble synthetic polymer. Although commonly for its applications in the adhesive and film industries, PVA has gained significant recognition in the field of agriculture. Its unique properties make it an invaluable asset for various agricultural practices, contributing to improved crop yields, efficient water usage, and enhanced soil quality.   PVA-based adhesives are utilized as a coating agent for seeds, helping to enhance adherence, provide controlled release of nutrients, and protect against pests and diseases. By using PVA as a binder for beneficial bioactive substances, such as growth promoters and pesticides, farmers can achieve precise and targeted delivery, reducing environmental impact and optimizing plant protection efficiency.   Unstable soils, prone to erosion, can negatively impact crop growth and nutrient retention. PVA emulsions or films are applied to soil surfaces to control soil erosion by stabilizing the soil structure. This protective layer acts as a barrier, reducing water runoff, preventing soil compaction, and minimizing nutrient leaching. PVA film also serves as an effective weed control measure, suppressing weed growth and competition.   Water scarcity is an ongoing concern in agriculture. PVA's water-soluble nature allows for the controlled release of water and nutrients to plants, ensuring proper hydration while minimizing wastage. PVA-based Mulch films are widely used to retain soil moisture, regulate soil temperature, and prevent weed growth. Additionally, these films are biodegradable, leaving no harmful residues behind.   PVA (PVA 088-35 & PVA 2088)  hydrogel formulations are beneficial in increasing water holding capacity and providing a reservoir of water for plant roots. This hydrogel application can improve seed germination, enhance rooting, and support the establishment of seedlings in arid or dry regions. The hydrogel's ability to retain moisture and nutrients promotes vigorous plant growth, leading to better crop development and increased yields.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

Polyvinyl Alcohol (PVA) adhesive is a versatile and widely used product in industries. Its unique properties make it an excellent choice for applications such as paints and coatings, paper making, textiles, and more.   PVA (PVA 088-07 & PVA 0888) adhesive has gained popularity in the paints and coatings industry due to its exceptional bonding properties. It provides strong adhesion to various surfaces, including wood, metal, and plastics, making it ideal for both interior and exterior applications. PVA adhesive offers excellent water resistance, flexibility, and durability, ensuring long-lasting results. Its ease of use and low odor make it a preferred choice for professional painters and DIY enthusiasts alike.   The paper making industry relies heavily on PVA adhesive for its superior binding capabilities. PVA adhesive enables the production of high-quality paper products by providing excellent adhesion between fibers. It improves paper strength, enhances printability, and reduces paper breakage during processing. Additionally, PVA offers good water solubility, which is essential for the controlled dissolution of paper in recycling processes.   In the textile industry, PVA adhesive plays a vital role in various applications, such as fabric finishing, laminating, and bonding. PVA adhesive provides a strong bond between different types of fabrics, ensuring secure seams and preventing fraying. It enhances the fabric's overall stability and durability, making it suitable for applications requiring resistance to washing, dry cleaning, and repetitive mechanical stress.   As a water-soluble polymer, PVA offers numerous advantages over other types of adhesives. Its water solubility allows for easy cleanup, reducing the need for harsh chemicals during application and removal. PVA adhesive can be easily diluted to achieve desired viscosity, making it suitable for a wide range of applications. Its non-toxic nature and low environmental impact further contribute to its appeal as a sustainable adhesive option. Polyvinyl Alcohol adhesive stands out as a reliable and versatile choice across various industries. Its exceptional bonding properties, water resistance, flexibility, and ease of use make it a preferred adhesive for paints and coatings, paper making, textiles, and more. Whether it's enhancing the quality of paper products, improving the durability of textiles, or providing a reliable bond in various applications, It continues to be an indispensable tool for industry professionals. Consider incorporating PVA adhesive into your manufacturing processes to benefit from its numerous advantages.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

In the ever-evolving landscape of industrial manufacturing, optimizing processes and improving product quality are key objectives. One material that has emerged as a game-changer in various industries is Polyvinyl Alcohol(PVA), commonly known as PVA. With its unique properties and versatility, PVA has revolutionized industrial processes, offering enhanced efficiency, reliability, and performance.   One of the notable applications of PVA lies in textile sizing. PVA (PVA 098-05 & PVA 0599), as a water-soluble synthetic polymer abundant in strength and flexibility, provides exceptional results when used in textile sizing processes. By evenly coating the fibers, PVA enhances their strength and improves the fabric's dimensional stability. Fabrics treated with PVA exhibit superior weaving performance, increased tensile strength, and resistance to abrasion.   PVA's water-soluble nature is a remarkable advantage in various industrial processes. As a water-soluble synthetic polymer, PVA offers diverse applications, including as a film-forming agent, a binder, and a thickener. It dissolves easily in water, making it an ideal choice for industries such as packaging, adhesives, and detergents. Moreover, being eco-friendly and biodegradable, PVA aligns with the growing demand for sustainable materials.   Adhesives play a vital role in numerous industries, from construction to automotive manufacturing. PVA, as a chemical raw material for adhesive production, brings exceptional bonding strength and reliability to the table. When used in adhesive formulations, PVA provides optimal adhesion to various substrates, delivering superior bond strength and durability. Its versatility allows for customizing the adhesive properties, making it suitable for a wide range of applications.   As the demand for efficiency, performance, and sustainability continues to rise, PVA stands at the forefront of innovation. Its remarkable properties and diverse applications position it as a key player in driving industrial advancements. Embracing PVA as a revolutionary material empowers businesses to unlock new possibilities, increase productivity, and contribute to a great future.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.

PVA High Strength Fiber is a type of synthetic fiber derived from Polyvinyl Alcohol. It exhibits remarkable strength, making it suitable for a wide range of textile applications. In the textile process, polyvinyl alcohol(PVA) is used as a sizing agent, which can improve the strength and smoothness of yarn, reduce the breakage rate, and improve textile efficiency. PVA fiber, as a product of polyvinyl alcohol, also plays an important role in the textile industry.    PVA High Strength Fiber stands out for its excellent tensile strength and durability. It retains its strength even when wet, making it ideal for applications that involve exposure to moisture or water. This strength is essential in various textile products that require superior performance and longevity.   One of the remarkable features of PVA High Strength Fiber is its water solubility. This property allows the fiber to dissolve completely when exposed to water or other aqueous solutions. As a result, fabrics or products made from PVA High Strength Fiber can be easily recycled or disposed of in an environmentally friendly manner, reducing waste and pollution.   PVA High Strength Fiber is considered an eco-friendly material due to its biodegradability and low environmental impact. Unlike synthetic fibers with non-biodegradable properties, PVA High Strength Fiber naturally decomposes over time, making it a sustainable choice for the textile industry. Additionally, its water solubility enables it to be easily washed away during processing, minimizing the release of harmful substances into waterways.   The outstanding properties of PVA High Strength Fiber make it suitable for various textile applications. It can be used in the production of lightweight and high-strength fabrics, such as sportswear, outdoor gears, and technical textiles. The water solubility of PVA High Strength Fiber also makes it ideal for temporary textiles, such as interlinings and embroidery backings, which can be dissolved after use.   When compared to other chemical fibers, such as polyester or nylon, PVA High Strength Fiber offers distinct advantages. It combines the strength and durability of synthetic fibers with the eco-friendly and water-soluble properties of PVA (PVA 088-07 & PVA 0888). Its biodegradability and reduced environmental impact make it an attractive option for manufacturers and consumers alike.   Website: www.elephchem.com Whatsapp: (+)86 13851435272 E-mail: admin@elephchem.com ElephChem Holding Limited, professional market expert in Polyvinyl Alcohol(PVA) and Vinyl Acetate–ethylene Copolymer Emulsion(VAE) with strong recognition and excellent plant facilities of international standards.