Canned Food Product- Importance of lacquering process, their classes/types and their applications by

Canned Food Product- Importance of lacquering process, their classes/types and their applications by https://padlet.com/onlykioko/80owyaortksc by Tang Yun Qi en-us 2016-12-06 11:44:45 UTC 2017-12-03 18:52:04 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Brightnessdown.png Importance of lacquering process onlykioko https://padlet.com/onlykioko/80owyaortksc/wish/142493072 (i) Protect the metal from corrosion
Most of the cans are made up of steel or aluminium which are susceptible to corrosion. Lacquer which coated on top of the metal can act as protection to the metal can.

(ii) Protect the can from any possibility of interaction between the metal and the food products
Lacquered can can limit the interaction between the can itself and the food product.

(iii) To avoid the discolouration of pigments such as anthocyanin
Fruits that are high pigmented such as berries are sensitive to reducing environment and hence will turn colourless. Metal can with lacquer can protect the discolouration of fruits packed inside the can.

]]> 2016-12-08 09:48:55 UTC https://padlet.com/onlykioko/80owyaortksc/wish/142493072 Class/Type of Lacquer onlykioko https://padlet.com/onlykioko/80owyaortksc/wish/142495823 (i) Epoxy-phenolic
This is the most widely lacquer used especially in food canning industry. It is resistant to acids and has high stability.

(ii) Acrylic
Acrylic is used when the can need to have good colour retention. It was used externally but now acrylic can be used internally as a white coatings to make the appearance attractive.

(iii) Phenolic
Phenolic lacquer is normally used for meat and fish products canning. Phenolic lacquer is stable over chemical and has low barrier.

(iv) Vinyl
Vinyl is usually used for secondary lacquer. It has good adhesion and flexibility and has odour and flavour barrier. However, it cannot withstand high temperature. It makes it not suitable to pack product that needed to undergo high processing temperature.

(v) Oleoresinous
This type of lacquer is modified with the addition of zinc oxide. It divides into two groups which are R group and C group. R group is used to pack high coloured fruits and vegetables while C group is used to pack high protein products.

]]> 2016-12-08 10:03:28 UTC https://padlet.com/onlykioko/80owyaortksc/wish/142495823 Application of lacquering onlykioko https://padlet.com/onlykioko/80owyaortksc/wish/142496788
Lacquer can be coated on the metal can by:-

(i) Sheet coating by using roller coater

(ii) Coil coating by reverse roller coater

(iii) Spraying

]]> 2016-12-08 10:08:11 UTC https://padlet.com/onlykioko/80owyaortksc/wish/142496788 References onlykioko https://padlet.com/onlykioko/80owyaortksc/wish/142503762 1. Footitt, R. J., & Lewis, A. S. (Eds.). (1995). The canning of fish and meat. Blackie academic & professional.
2. Different Tin Can Enamel / Lacquer Coatings for Food Use (2010). Retrieved from http://foodrecap.net/manufacture/pack/tin-can-coating/

]]> 2016-12-08 10:45:44 UTC https://padlet.com/onlykioko/80owyaortksc/wish/142503762