Silicon oxide coated polyester

Silicon oxide film (SiOx) is an interesting material in the field of the food and pharmaceutical technologies as well as the microelectronics technology. SiOx film possesses a high gas barrier property besides high thermal stability and high electrical insulation. Therefore, SiOx-coated polyester (PET) film is a possible material used for packing to protect foods or medicines from the deterioration by oxidation. 

The total thickness of the pouch and individual thickness of the different layers of all the retort pouches are presented in the Table 2. It has been observed that there is not much variation of thickness of pouches of individual layers from one laminate to another. The thickness of different pouches ranged from 135-110 pm for the opaque retort pouches and 150-120 pm for the clear pouches. Both imported and indigenous pouches were having uniform thickness throughout the same specimen. The OP-B pouch was having one extra nylon layer apart from polyester, aluminum foil, and cast polypropylene layer. In case of clear pouches, CP-C had only two layers that is polyester and CPP, whereas in CP-A, there were three layers, where the outer polyester layer was coated with aluminum oxide and nylon was also present. In the case of CP-B, the polyester layer was quoted with silicon dioxide. The thickness of the pouch had a direct influence on the heat penetration characteristics and product quality. Non uniform thickness can affect the machine performance, product protection, and integrity of the packages (Hemavathi, Anupama, Vani, Asha, Vijayalakshmi, Kumar, 2002). The... 

Magnesium Hydroxychloride Cement n (Sorel cement, magnesium oxychloride cement) A mixture of magnesium chloride and magnesium oxide that reacts with water for form a solid mass, presumed to be magnesium hydroxychloride, Mg(OH)Cl. It has been useful as an intumescent coating for urethane foams and other materials such as polystyrenes, nylons, acetals, polyesters, and silicones. 

Paints and coatings can be divided into two categories convertible type which need a chemical reaction, such as oxidation or polymerization, and the non-convertible type which are formed by evaporation of the solvents. The former category includes alkyds, epoxy, esters, polyesters, urethenes, silicon and other resins. 

---