Shanghai ShiCi International Trading Co., LTD.
  • Products
    The company mainly produces and sells "HUAMAO" as well as "SANWEI" two major brand products. Products covered three series: One is polyvinyl alcohol (PVA) series of products with an annual capacity of 100,000 tons; the second is dispersible polymer powder can be 85,000 tons per year; the last is the cellulose products annual capacity of 60,000tons. 
  • Services
    Shanghai Shici is willing to provide products with high performance and high quality. Good after-sales services guaranteed for better shopping experience. Please feel free to contact us!
  • Company
    Shanghai shici International Trading Co.Ltd is a professional company which contain enterprise sales, warehousing, distribution, technical services. Shanghai Shici in view of the new market situation and customer demand, the establishment of raw material supply as the core, formulation research, technical support, such as supporting the "integration, one-stop" service marketing model. 
  • Application
    Our polyvinyl alcohol (PVA) series of products, dispersible polymer powder, hydroxy propyl methyl cellulose and other related products are well applied in many fields such as paper, adhesives and emulsion, textiles, barrier films, tec,.
  • Resources
  • Contact

Barrier Films

Polyvinyl alcohol (PVA) is a water-soluble polymer, characterized by good compactness, high crystallinity, strong adhesion, thin film flexible and smooth, oil resistance, solvent resistance, abrasion resistance, good gas permeability, and the special treatment of water resistance, widely used.

Polyvinyl alcohol is non-toxic, tasteless, harmless to the human body, with good affinity to the natural environment, no accumulation, no pollution.
Polyvinyl alcohol film is a green functional material with polyvinyl alcohol as the main body, adding modifier and other additives, which can be completely degraded by microorganism in the soil by special process processing. It can degrade into carbon dioxide and water in a short period of time and has the effect of improving land.

The biggest advantage of PVA film is water solubility, and the biggest drawback is water resistance. Water resistance is due to the hydrophilic hydroxyl (OH) in its molecule. The water resistance of PVA film can be improved if the hydroxyl group is properly closed and the water resistance groups are grafted on. PVA contains hydroxyl, which can occur all typical reactions of polyols, the appropriate condensation is selected, in the case of small amount of addition, it can be made with the hydroxyl in PVA, so that PVA forms a strong three-dimensional structure, stabilizes the air tightness of PVA under wet condition, and enhances the water resistance. In practice, the water solubility and moisture absorption of polyvinyl alcohol films can be controlled by adjusting the raw materials, recipes and processes to meet the needs of different use purposes.

Polyvinyl alcohol films are divided into the following categories according to dissolution characteristics:
Ambient temperature soluble Film (NT type, rapid-soluble film, cold film): Dissolution temperature 25 ℃
Medium-Temperature soluble film (IT type, also known as medium-soluble film, hot-melt film): Dissolution temperature 65 ℃
High-temperature soluble film (HT type, also known as refractory film, soluble film): Dissolution temperature 85 ℃
Special film: According to the specific use of the design formula and technology, to meet the requirements of special use.
Leave a Message Email Us

we will contact you within 24 hours.

  • TEL:+86 021-34781766
  • ADDRESS:ROOM208, Building39, No.2049, Pujing Road, Minhang District, Shanghai, China