The main usages of PVA film and PVA bags
Used in the manufacture of polyvinyl acetal, gasoline resistant pipes and vinylon synthetic fibers, fabric treatment agents, emulsifiers, paper coatings, adhesives, etc.
A water-soluble polyvinyl alcohol fiber and a preparation method thereof, characterized in that 100 parts of polyvinyl alcohol having a degree of polymerization of 500 to 2000 and a degree of alcoholysis of 75-99 mol% is used, and dimethyl sulfoxide/water = 90 to 70: 200 to 400 parts of mixed solvent of 10 to 30, added to a stainless steel dissolution vessel, stirred at a temperature of 80-120 ° C, a pressure of -0.01 to -0.08 MPa, dissolved for 3 to 4 hours, formulated into a spinning solution, filtered, Defoaming, dry-wet spinning and post-treatment, obtaining water-soluble polyvinyl alcohol fiber, the fiber has a water-soluble temperature of 10 to 90 ° C, a strength of ≥3.5 cN/dtex, a single fiber fineness of 1.5 to 10 dtex, and an elongation at break of 15 to 30. %, the filaments are processed into tops, mixed with wool strips, slivers, hemp and chemical fibers to make high count yarns or hollow yarns, or cut into short fibers for non-woven fabrics, embroidered base fabrics and papermaking. .
It has the following excellent properties:
The soluble PVA is soluble in water, and the higher the water temperature, the greater the solubility, but it is almost insoluble in organic solvents. The solubility of PVA varies with the degree of alcoholysis and degree of polymerization. Partial alcoholysis and low degree of polymerization of PVA dissolve very quickly, while full alcoholysis and high degree of polymerization PVA dissolve slowly. The general rule, the effect on the solubility of PVA, the degree of alcoholysis is greater than the degree of polymerization. The PVA dissolution process is carried out in stages, namely: affinity wetting-swelling-infinite swelling-dissolution.
The film-forming PVA is easy to form a film, and the film has excellent mechanical properties, and the tensile strength of the film increases as the degree of polymerization and the degree of alcoholysis increase.
Adhesive PVA has good adhesion to hydrophilic cellulose. In general, the higher the degree of polymerization and the degree of alcoholysis, the stronger the bond strength.
When the heat-stable PVA powder is heated to about 100 ° C, the appearance gradually changes. Partially alcoholized PVA began to melt at around 190 ° C and decomposed at 200 ° C. The fully alcoholized PVA begins to melt at around 230 ° C and decomposes at 240 ° C. Thermal cracking experiments show that the lower the degree of polymerization, the faster the weight reduction; the higher the degree of alcoholysis, the shorter the decomposition time.
The medical PVA has the specifications of PVA05-88, PVAl7-88, PVA-124, etc. The alcoholysis degree of the first two specifications is (88±2) (m01)%, and the average polymerization degree (n) is 500~600 and 1700 ~ 1800; PVA. The alcoholysis degree of 124 is 98 to 99 (m01)%, and the average degree of polymerization (n) is 2,400 to 2,500.
The development of new pharmaceutical excipients and the promotion of dosage form optimization are one of the strategic tasks for the development of Chinese traditional Chinese medicine and international integration. PVA has the characteristics of convenient synthesis, safe and low toxicity, easy control of product quality, low price and convenient use. Therefore, PVA is an excellent pharmaceutical excipient with potential for redevelopment.
Patented full biodegradable film and PVA bag, all products are made by casting equipment, It is different from traditional blow molding products, all blow molding products are non full biodegradable. We can produce pva films and bags in all transparent and various colors.
For more PVA film and bags products please visit us:
http://www.joyful-printing.net/pva-bag/
http://www.joyful-printing.com/pva-bag/
The factory is located in the chuangxin industrial Park of Leiyang City, Hunan Province. 2 hours high-speed railway journey from Shenzhen. With cheap manpower and development costs, so we could offer good products with cheap price to our guests.
There are several advanced PVA water-soluble film production lines, various packaging bags and shopping bag production lines in our factory. We have developed PVA films of various temperatures. Among them, PVA high-temperature film technology is the world's leading film technology, and there is a strong R&D team and management team in our factory. We are a new materials technology company specializing in the research, production and sale of water-soluble films (PVA-polyvinyl alcohol film).
PVA water-soluble film has excellent barrier properties, water solubility and environmental friendliness. It is one of the most successful green materials in recent years. It has been widely recognized by environmental authorities and users at home and abroad, and is increasingly used in packaging, textile embroidery and water transfer printing.
For example: pesticides, fertilizers, dyes, detergents, water treatment agents, mineral additives, detergents, chemical reagents for garden care, etc., can also be used as rapeseed, plant seed bags, clothing bags, food and hospital washing bags, industrial The packaging of various products such as supplies and electronic products can also be used for textile embroidery padding materials, water transfer printing, and film stripping. At the same time, the company successfully developed packaging bags and supermarket shopping bags for various application scenarios this year. Customized bags and shopping bags of various specifications.
The factorey specializes in product quality, technology improvement and product innovation, and is committed to providing customers with products and services that are satisfactory.