The main points of intestinal coating processing.

1、Soak and bleach The original intestine (fresh intestine after de-fecalization) is immersed in water, and the intestine is filled with water, generally the water temperature is about 28℃ in spring and autumn, about 33℃ in winter, and cool water is used for soaking in summer, and ice can be added when the weather is hottest. Soaking time 18 to 24 hours. Soaking water should be clean, not containing alum, nitrate, alkali and other substances.

2, scraping intestines will be soaked intestines out on a wooden board scraping system one by one. Manual scraping can be used bamboo board or no blade scraper, scraping the intestine inside and outside without part, generally only scraping the intestinal wall (mucous membrane surface), you can get a transparent film. When scraping to force evenly, to avoid scraping. Scrape off the intestinal mucosa with a pipeline transport used to make heparin sodium raw materials.

2、Irrigation After scraping the light can be rinsed by inserting the tap into one end of the intestine, and check that there are especially leaky broken holes or ulcers, unusable parts need to be cut out, and then washed.

4、Measure the yards of washed intestines every 100 yards (91.5 meters) into a handful, each handful shall not exceed 18 sections (pigs), and each section shall not be shorter than 1.5 yards (1.35 meters).

5, pickled intestines will have been tied into the intestinal coating scattered with fine salt evenly pickled. Pickling must be salted once, generally 0.5 ~ 0.6 kg of salt per hand, pickled and re-tied in the bamboo sieve every 4 ~ 5 bamboo sieve stacked together, placed on the tank or barrel so that the brine leaching out.

6、Wrap the axillary intestine after 12 ~ 13 hours, when the intestinal coat is half dry and half wet state will be added to wrap the handle, that is, "light intestine" (semi-finished products, not divided).

7, bleaching dip washing "light intestine" immersed in water, repeatedly changing water washing, must be clean inside and outside the intestine unclean material. Rinsing and soaking time, not more than 2 hours in summer, winter can be extended, but not overnight. Rinsing water temperature shall not be too high, if too high can add ice.

8, irrigation and division of the washed "light intestine" into the water, on the one hand, to test the intestinal coating has not broken loopholes, on the other hand, according to the size of the intestinal coating for division. Pork intestine casing 2 mm per way, a total of seven ways divided, one way (24 ~ 26 mm), two ways (26 ~ 28 mm), three ways (28 ~ 30 mm), four ways (30 ~ 32 mm), five ways (32 ~ 34 mm), six ways (34 ~ 36 mm), seven ways (more than 36 mm).

9, with the code to the same way to divide the intestinal coating according to certain specifications size tied into the handle.

10, pickled intestine and wrap the code into a handle, and then pickled with fine salt, to be drained of water and then wrapped into a handle, that is, "clean intestine" finished products (fine intestinal coating).

The main equipment is relatively simple: small intestine scraping machine, white dirty conveyor, sorting table, washing machine, blowing tank, air compressor and work apparatus, cold storage.

Raw and auxiliary materials: pig small intestine, refined salt.