Seven applications of polyvinyl alcohol

The consumption of polyvinyl alcohol is mainly in 7 major areas. Understanding the consumption composition and regional distribution of these areas will have a certain reference for your demand decision-making. I will talk about the application areas of polyvinyl alcohol.

Building glue

? The application of polyvinyl alcohol in this industry mainly includes putty glue, paint binder base material, the amount of which accounts for more than 40% of the total, and it is the first largest application field worthy of the name. High-viscosity products have been widely used in developed coastal areas , and are the main varieties for the future demand of the polymer cat chemical glue industry for construction.

Chemical Fiber Industry

? Polyethylene fiber is also called vinylon in the chemical fiber industry. Vinylon fiber is a valuable functionally differentiated fiber. Water-soluble vinylon fiber has two categories: filament and staple fiber. Water-soluble vinylon filament is an ideal water-soluble fiber. It is a characteristic variety of vinylon. It can have a water-soluble temperature of 0～100℃ and can be used for various purposes. It has ideal water solubility temperature and strength, good acid resistance, alkali resistance, and dry heat resistance. After being dissolved in water, it is odorless and non-toxic. Its aqueous solution is colorless and transparent, and it can be naturally biodegraded in a short time.

Adhesive

? Polyvinyl alcohol is combined with other chemical raw materials to make adhesives or white latex for various purposes, which are mainly used for paper, wood, textiles, office glue and high-grade paint base materials. Users in this field are mainly concentrated in East China and South China, especially in Jiangsu, Zhejiang, Fujian and Guangdong.

Medicine

? Polyvinyl alcohol is widely used as a new type of fiber material in medicine and pharmacology. When the capillaries are connected, the PVA tube and the adhesive that must be melted in a short time can be connected with one touch, which greatly simplifies the capillary resection; PVA is used as a high water-containing polyurethane elastomer as an external fixation stent and heart membrane It can be used to make up for raw materials such as thickening of the pleura; acrylic emulsion shrinks the interior of the formaldehyde honeycomb to make artificial skin, artificial muscle, artificial cornea, laminated glass, etc.; PVA can be used as a raw material for dental repair; PVA hollow chemical fiber has a large area and can be made Artificial lung, PVA hollow chemical fiber can be selectively permeated, which can produce bionic eye mask; PVA water-soluble chemical fiber is used as suture for surgical treatment, without surgical suture removal after surgery; PVA tear film can produce tears to treat dry eyes Syndrome, PVA concentrated solution and ointment are evenly mixed to make a general medical dressing, which produces a film on the surface of the skin such as trauma . The drug ingredients can be fully digested and absorbed by the acne, and the environment does not pollute clothes and pants.

? Polyvinyl alcohol has been more widely used in pharmacology. Adding PVA to drugs can control the release rate of drugs. When the PVA-containing medicine is melted, the surface layer digests and absorbs water and swells to produce suspicious glue, which prevents water from infiltrating into the raw material management center. After the suspicious glue is slowly melted, the water is enough to slowly enter, and the drug is slowly digested Absorption, and then make slow-setting, constant-release sugar-coated tablets, enteric-coated drugs; liquid drugs add PVA to increase the viscosity of the drug to achieve high-efficiency effects, and make high-efficiency ophthalmic drugs.

Plastic film

? The interpenetrating network structure polymer material plastic alloy composed of the blend of modified material PVA and modified starch is degradable. Plastic films suitable for packaging foods, water-soluble plastic films for agricultural vehicles, utensils, and disposable consumer utensils are often produced. The waste materials can be swallowed by microorganisms in the wet and cold soil layer and dissolved into carbon dioxide and water, which is harmful to the natural environment. Zero pollution is beneficial to environmental protection and maintaining a green life. Therefore, the products produced are classified as green products and have excellent application prospects.

Paper industry

? Polyvinyl alcohol is used as a surface sizing agent, color paste adhesive and preservative for mill preservatives in the paper industry. The paper surface sizing agent made of PVA can improve the surface compressive strength and internal support force, crack resistance, tear resistance and abrasion resistance of paper products, improve the gloss and smoothness of the paper, and enhance Paper type abrasion resistance, acid and alkali resistance and solvent resistance. Because the PVA solution has strong adhesion to paper and good demulsification, it can replace the expensive casein which is very prone to corruption to make the color paste adhesive. The fineness and smoothness of the coated paper is good, and it is not easy to beat. Rolls are low-cost, so they are widely used in high-end paper such as fine art paper and processed craft paper.

Other applications

? Polyvinyl alcohol is also used as soil conditioner, preservative for mortar work, cold storage agent, catalyst carrier, surfactant, etc. In addition, PVA can be used to develop and design many new products and new main uses.