什麼是牛脂?

Also known as tallow, tallow, beef fat, and beef tallow, it is a refined form of tallow or mutton fat and is mainly composed of triglycerides.

Industrially, tallow is not strictly defined as beef tallow. In this case, tallow is animal fat that meets certain technical standards. Commercial beef tallow often contains fats from other animals, such as lard from pigs, or even fats from plant sources.
The solid material remaining after rendering is called cracks, grease, or graves. It is mainly used in animal foods such as dog food.

In the soap industry and soapmaking enthusiasts, the name tallowate is used informally to refer to soaps made from tallow. For example, sodium tallowate is obtained by reacting beef tallow with sodium hydroxide or sodium carbonate. It consists primarily of a variable mixture of sodium salts of fatty acids, such as oleic acid and palmitic acid.

composition

Beef tallow is 100% fat, consisting primarily of monounsaturated and saturated fats, with no water, protein or carbohydrates.
The fatty acid content of beef tallow is:

saturated fatty acid:

  • Palmitic acid (C16:0): 26%
  • Stearic acid (C18:0): 14%
  • Myristic acid (C14:0): 3%

Monounsaturated fatty acids:

  • Oleic acid (C18-1, omega-9): 47%
  • Palmitoleic acid (C16:1): 3%

Polyunsaturated fatty acids:

  1. Linoleic acid: 3%
  2. Linoleic acid: 1%

use

food

Traditionally, an important use of tallow was in the production of shortening. And until vegetable oils for frying became increasingly popular, they were the first choice for this purpose. Many restaurants have used it, such as McDonald's, Burger King, Wendy's, etc. also use beef fat for frying.

Oil residue

Grease or crack is the fibrous material left over from the rendering process, often pressed into cakes and used as animal feed, especially dogs and pigs, or as fish bait. In the past, it has been both favored and ostracized in dog food.

fuel

Tallow can be used to produce biodiesel in much the same way that vegetable oils are currently used.

aviation fuel

The U.S. Air Force has successfully experimented with using tallow in aviation biofuels.

print

Tallow was also used in printmaking, where it was combined with bitumen and applied to metal printing plates to provide resistance to acid etching.

Candle

Tallow was widely used in making molded candles before more convenient wax varieties became available, and they remained a cheaper alternative for some time afterwards. For those too poor, even homemade molded tallow candles were not available, often simply called "dip" or, due to their low cost, "farthing dump" or "penny dump".

lubricating

Tallow is a traditional lubricant that is easily available, inexpensive and used infrequently. For example, it was used in the past:

  • Widely used to lubricate locomotive and ship engines
  • Industrial use is as a lubricant for certain types of light engineering work, such as cutting threads on electrical conduits. Not used often.
  • rifle
  • Tallow was also used in traditional bell foundries as an insulator for fake bells when casting

Tallow is used to make biodegradable motor oil.

industrial

Tallow can be used as a soldering flux.

textile

Suet is widely used in textile manufacturing as a starch, lubricant and softener. Textile pretreatment includes a process called sizing. When sizing, chemicals are used to provide the required strength to the yarn installed on the loom. Suet gives the yarn the strength and lubrication it needs.

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