Qingdao Artificial Casing Co., Ltd.
Plastic sausage casing
Plastic casing is used for any kinds of sausage package.
Plastic casings are extruded like most other plastic products. They also can be flat or shirred. Generally, smoke and water do not pass through the casing, so plastic is used for non_smoked products where high yields are expected. The inner surface can be laminated or co_extruded with a polymer with an affinity for meat protein causing the meat to stick to the film, resulting in some loss when the casing is peeled, but higher overall yield due to better moisture control. 
Plastic casings are generally made from polymers such as Polyamide, Polypropylene or Polyethylene. Polyamide (Nylon) plastic casings are the most commonly used in production of cooked sausages and hams such as luncheon meat and bologna. Polyamide casings come in two main varieties: Oriented and non_oriented. The oriented polyamide are shrinkable casings and will shrink during the cooking process thereby reducing the water loss. Non_oriented polyamide casings remain the same diameter during the cooking process and thereby allow for expansion of the meat during cooking.
Flat caliber:  38mm-200mm 
Thickness:    20um-30um  (one slice)
Color: Many colors available.
Printing: according to the customer's requirement.
Product Feature:
(1)High water and gas-proof keeps longer shelf life. 
(2)Good meat adhensive, and brightness appearance. 
(3)suitable shrinkage make the sausage full and round, and  good appearance.
Use directly or soaked in about 20℃ water for 5 minutes. 
Filling with standard machine or by hand. 
For producing the mould sausages should appropriately reduce filling staffs to prevent too tight filling.
After sterilized could be cooled by water or air.
The mould sausage should be cooled enough before taking out.
Collagen Casings
Our Collagen casing is fabricated from collagen, which is obtained from the curium layer of selected split cattle hides. The collagen-rich tissue is homogenized under high pressure, ring-extruded (hose-shaped) and hardened and results in a mechanically strong casing. Our Collagen casing are permeable for smoke and water vapour. As collagen is an animal tissue fit for human consumption, the thin collagen casing are easy to chew and “edible”. They are an alternative to replace natural sheep, goat or thin pig casings. The advantages of collagen casing are their standard diameter and strength and that they can be “shirred” i.e. folded together, in long lengths and used for manual or automatic filling stations without pre-soaking in water.

With machines imported from Germany and our patented technology,our Collagen Casings can offer outstanding performance to the sausage manufacturers in terms of consistency, linking performance, appearance, cooking performance and taste quality. The casing is available in a large range of diameters,from 13mm-130mm, with colors clear, onion, caramel, dark caramel and smoked.

Now we provide collagen casings for dried and semi-dried sausages,beef sticks, salami sausages, pet sausages,barbecue sausages, cooked & smoked processed meat sausages,and other fresh meat sausages.

1. The technical data of the Collagen casings is:

Collagen: 40%
Moisture: 25% max
Cellulose: 12% max
HPMC: 8.0%
Glycerol: 8.0%
Ash: 5% max
Lactic acid: 3.0%
Vegetable Oil: 2% max
Fat: 2% max

2. Product Microbiological Condition

Yeasts /g (25ºC):       < 50/g
Molds /g (30ºC):       < 50/g
Coliforms /g (35ºC):    < 3MPN/g
Staphylococcus aureus /g: negative
E. coli /g:    negative
Salmonella /g: negative

3. Sausage Products that Collagen Casings Apply to

●     Different sausages    Cooked and Smoked sausages
●     Taiwan sausage      Crispy sausages
●     Bologna            Different dried sausages and salami
●     Ham               Wiener、frankfurter and hot dog
●     Fresh sausage
4. Packing
Casings are packed in Vacuumed polybag in cardboard boxes, resistant to humidity and air.

5. Storage conditions
Store the casings in cool and dry place with temperature between 10-25℃, humidity 60-70%, avoiding the exposition of the product to direct action of heat.

6. Shelf Life: 2 years
Our collagen casing is made from high quality collagen fiber in a safety and sanitary manner. The product is free from any industrial chemicals and it is fit for human consumption.
7. The production process of collagen casings is:
Bovine hide--------remove the corium layer----collagen layer-----liming-------water
washing-----buffering---acid swollen—-grinding------------Defibering-------
mixing collagen with CMC & cellulose---homogenizing----cold storage (collagen dough)
Collagen dough---extruding casing---drying---coagulating + neutralization----
Drying ---shirring----packing
Cellulose Casings
Cellulose as a natural material derived from wood or cotton has proven to be suitable for sausage casings as it is:
  • mechanically resistant
  • widens when soaked in water and shrinks when dried (which exactly meets the requirements for a tight and smooth casing without formation of wrinkles on the sausage surface)
  • permeable for gases, smoke and water vapour

Simple thin cellulose casings are used as so called peeling casings for frankfurter type sausages. The batter is filled into such casings (caliber range 12-42 mm) and portioned. Thereafter the products undergo smoking and cooking (at 74oC), which causes the build-up of a firm layer of coagulated protein under the casing. After this heat treatment, the cellulose casings are removed and the sausages maintain their shape due to the firm external layer of coagulated protein. As ready-to-eat sausages do not have a casing, they are also known as “skinless sausages” (Fig. 326, 327, 328).

Cellulose casings are not suitable for larger sausage calibers as frequent breakages may occur due to rupture of the cellulose wall. In order to solve this problem, fibrous casings were developed. Fibrous casings are cellulose casings reinforced with strong cellulose fibres. These fibrous casings are resistant enough for large sausage calibers and still suitable for smoking (Fig. 329).

As a further step in the development of strong fibrous casings for large calibers, a layer of synthetic material, (e.g. PVDC) was added to the inside or outside of the casings (coated fibrous casings). The coating made the casing mechanically very resistant and created a complete barrier for gases, i.e. no evaporation losses can occur (Fig. 330).

However, fibrous casings with an inside or outside synthetic coating cannot be used for products to be smoked, as no smoke penetration is possible, and for products to be dried and fermented, as no water vapour evaporation is possible. They are mainly used for cooked sausages of the raw-cooked and the precooked-cooked type. The main advantage of coated fibrous casings for cooked sausages is the casing wall tightly enclosing the sausage mix and the easy peeling. As smoke does not penetrate through coated fibrous casings, smoke flavour can be added during manufacture of the sausage mix if desired.

Directions for Use
  • Casings should be stored sealed in cartons, in a cool dry location away from direct sunlight. Ideal storage conditions are at 4 degree C - 24 degree C and 55% to 60% RH. In these storage conditions, the casings have a two years shelf life.
  • The shirred casing is fully ready to use as shipped in the Caddy, and must not be immersed in water prior to using.
  • The shirred casing can be used with all types of sausage processing, including liquid smoke, acid showers, natural smoke, steam and water cooking, and can make all types of sausage. Speedy Peel casings work with acid shower buffered above pH 4. Below pH 4, use Regular Peel casings, which work in pH range 2.5 to 3.5 with maximum acid concentration of 10%. Acid showers are typically sprayed for one minute time duration, at a temperature of 38 degree C.
  • Always ensure the stuffing machine is set up correctly, and the casing is filled to the desired recommended stuffing diameter, using the correct linker chains and the correct stuffing tube. When stuffing tubes are undersized, air can enter the meat and fat can separate in the meat emulsion. When the casing is too large,it will break because it cannot rotate freely on the stuffing tube.
  • The stuffed casing surface should be moist without any water droplets when smoke is applied. Water droplets on the casing surface will leave spots on the sausage. Very dry casing prohibits adequate smoke penetration, creating pale color.
  • The stuffed casings should be processed in the smokehouse within 45 minutes after stuffing, or else smoke color will be harder to develop and peeling will become more difficult.
  • Typically the stuffed Speedy Peel casing is processed at relative humidity of 20% to 35%, and Regular Peel casings at humidity greater than 40%. Higher humidity improves peeling, but creates more fat on the surface of the sausage, and also lightens the sausage color. Below 20% humidify, the product will be impossible to peel.
  • Oven cooking temperatures should be set to reach desired sausage internal temperature, and to enhance sausage skin color development.
  • After processing, but before peeling, the stuffed casing must be chilled very quickly to reduce the sausage temperature, preferably with brine chill if available. Otherwise later the casing will not peel. Ideal chill temperature is under 4 degree C.
  • The stuffed casing should be extremely damp in order to peel, and then peeled while cold, at less than 4 degree C temperature, preferably using steam peelers.
  • To optimize sausage manufacturing, especially peeling, casings will be customized, with various mechanical properties, various end closures, various compositions and various additives.

Storage Conditions:

The casings should be stored in the cartons and caddy boxes between 4 deg C and 25 deg C, at room Relative Humidity of 50% to 70%.
Keep the casing away from direct sunlight, both caddies and cartons.
Unused casing should be returned to the caddy and covered completely in plastic so the casing will not dry out.
If the casing does dry out due to exposure to air, put the casing in a refrigerated high humidity room to remoisturize.
Always use casing FIFO: First In First Out, because the casing has a limited shelf life.
About Us

Qingdao Artificial Casing Co., Ltd. is located in Qingdao, which has the most important seaport of China-Qingdao port. We’ve two factories in Shandong province and an exporting company in Qingdao city.

We are the professional supplier of artificial casings for years. Our main products include collagen casings and cellulose casings. After several years’ research and development, our products had served many customers from all over the world and won good reputation. The casings had been exported to many countries, such as USA, Germany, Denmark, Russia, Indonesia, Malaysia, Brazil, Peru, etc., and we will go on developing more markets with full sincere.

Our company has abundant export experience, excellent quality products and the best service for all our clients sincerely. We insist on the value of Human-oriented and Customer-first, directed by the market and survival with good quality. Hope that we could establish stable partnership with all our clients, and seek long-term development together.