Introduced milking machines made of copolyester

Specialty plastics supplier Eastman has joined Vansun Technologies, a supplier milking machines to milk farmers across India for production automatic milking machines from cows made with Tritan copolyester. It is a clear, durable, shatter-resistant polymer that is BPA-free.

How do milking machines work?

Automatic milkers work on the principle of vacuum, just as a calf sucks its mother. The vacuum applied to the teat opens the teat cup (milking phase) and the milk flows downwards. Dairies need transparent plastic material in the critical area where users want to observe the flow of milk. Previously, Vansun used polycarbonate (PC) and polyphenylene sulfide (PPSU), but farmers often complained about breakage during use and the blunt material the machines were made of.

The challenge of milking machines

Since cow and buffalo milk have a high fat content, the milk that passed through the machines left a residual turbidity that affected the transparency. Additionally, the components are subjected to CIP treatment at high temperatures of 80 degrees Celsius in the presence of alkaline and sometimes acidic solutions. This represents a significant stress factor for the longevity of the material. The machines also took on a yellow tone that users didn’t like. Eastman’s Tritan has successfully replaced PC and PPSU in many applications. Products made of tritan are transparent, durable, safe and elegant.

  • Since the mid-1980s, world milk production has increased by more than 50%.
  • Today, there are about 150 million farms in the world that produce milk.
  • There are more than 260 million dairy cows in the world.
  • In Europe, each cow gives about 22 liters of milk per day.
  • The United States produces more than 30 liters per cow per day.
  • In the last 40 years, milk production per cow has more than doubled.
  • Global milk production has increased by more than 50% since 1983. In 2013, it amounted to 747 million tons.
  • 10% of the total milk production is used for drinking milk.
  • A cow’s udder contains between 11 and 23 liters of milk.
  • 2% of milk comes from goats, 1% from sheep, 11% from water buffalo, 85% from cows and 0.4% from camels.
  • India is the country that produces the most milk, with 18% of world production.

Source: FAO, CIWF

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