Abstract
The study indicated that the suitability of indigenous polymer coated TFS cans for processing at high temperature and pressure. The cook value was found to exhibit an inverse relationship with processing temperature (p<0.05) and was maximum at 115°C and minimum at 130°C. The fish products were acceptable even after 24 months of storage at ambient temperature. The initial overall acceptability score of about 8.75 and it was gradually reduced to around 6.78. It can be seen that the initial pH of fish, shrimp, crab and mussel curries are 5.9, 5.7, 5.6 and 6.0 respectively indicating that it is towards the acidic side. The acidic nature of the product can be attributed to the acidity contributed by the curry ingredients like tomato. During storage, the pH of the products was found to exhibit a decreasing trend. On the 6th, month of storage, the pH of fish, shrimp, crab and mussel curries are 5.7,5.6, 5.6 and 5.8 respectively which are significantly lower as compared to initial values. On the 12th month of storage, the pH of fish, shrimp, crab and mussel curries are 5.6, 5.6, 5.5 and 5.7 respectively. The results of the present experiments showed that the polymer coated TFS cans are suitable for processing fish products. Polymer coated TFS cans was found to withstand all the conditions of thermal processing. The TFS cans which are now available in India can be used for thermal processing of various fish products as a substitute to other packs.
Highlights
Tinplate is light gauge, cold reduced, low-carbon steel sheet or strip, coated on both sides with commercially pure tin
Indigenous polymer coated tin free steel can with Easy open ends (EOE): Indigenous Polymer Coated Tin Free Steel cans of size 307X 409 (6 oz capacity manufactured by M/s Amtech Packs, Mysore) were used for the present study (Plate 8)
These are 3- piece cans manufactured by (Draw and Redraw) DRD process and are available along with Easy Open Ends (EOE). Both the can and EOE are made from Electrochemically Chromium Coated Steel (ECCS) plate coated with Poly Ethylene Terephthalate (PET) on either side
Summary
Cold reduced, low-carbon steel sheet or strip, coated on both sides with commercially pure tin It combines in one material the strength and formability of steel and the corrosion resistance and good appearance of tin. Today the opportunity for tin in canning become a great industry, material like tinplate and aluminium have become universally adopted for the manufacture of containers and closures for food and beverage, largely due to several important qualities of containers of these metals. These include their mechanicals strength and resistance to working, low of temperature and ideal surface for decoration and lacquering. In the present study feasibility of packing fishery products in indigenes polymer coated tin free cans were tried
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