1. A single-layer or multilayer tubular food film that can be smoked, air-dried, and peeled, wherein the food film is manufactured of a homogeneous molten plastic material in a (co-)extrusion film blow molding plant by means of (co-)extruded plastics supplied to a nozzle of a blow head and biaxially stretched in the triple-bubble process,
wherein
the homogeneous molten plastic material is produced of a plastic blend of
polystyrene or a blend of various polystyrenes, and
polyvinyl alcohol, andor
polyether block amide.
2. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the plastic blend includes
a proportion of polystyrene or a blend of various polystyrenes from 20 to 98% (wt.),
a proportion of polyvinyl alcohol from 1 to 50% (wt.), and
a proportion of polyether block amide from 1 to 30% (wt.).
3. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 2, wherein the plastic blend includes
a proportion of polystyrene or a blend of various polystyrenes from 55 to 90% (wt.), in particular from 60 to 75% (wt.),
a proportion of polyvinyl alcohol from 5 to 30% (wt.), in particular from 15 to 25% (wt.), and
a proportion of polyether block amide from 1 to 15% (wt.), in particular from 5 to 10% (wt.).
4. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the food film exhibits a film thickness in a range from 10 to 50 \u03bcm, preferably from 15 to 25 \u03bcm, preferably at a caliber of up to 90 mm, in particular at a caliber in a range from 15 to 40 mm.
5. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the food film exhibits a water vapor permeability of at least 0.5 kg(m2\xb7day), preferably in a range from 0.5 to 0.75 kg(m2\xb7day), at a film thickness of 20 \u03bcm.
6. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the food film exhibits an oxygen permeability of at least 4,000 cm3(m2\xb7day), preferably in a range from 4,000 to 6,000 cm3(m2\xb7day).
7. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the food film exhibits a modulus of elasticity of at least 3,000 Nmm2, preferably in a range from 3,000 to 3.600 Nmm2.
8. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the food film exhibits a\u2014preferably automatic\u2014peelability at a velocity of at least 0.4 ms to 1.0 ms, in particular of at least 0.5 ms to 0.7 ms.
9. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the plastic blend includes at least one silicate.
10. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the plastic blend includes at least one filler selected from a group consisting of corn starch, cellulose powder and micro glass beads.
11. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the plastic blend includes at least one filler selected from a group consisting of chalk, talcum, salts and other mineral substances.
12. A method for the manufacture of a single-layer or multilayer tubular food film that can be smoked, air-dried and peeled comprising,
manufacturing a homogeneous molten plastic material in a nozzle blast drawing process and under subsequent biaxial stretching in a triple-bubble process,
wherein
the molten plastic material is produced of
polystyrene or a blend of various polystyrenes, and
polyvinyl alcohol, andor
polyether block amide.
13. The method of claim 12 wherein the plastic blend includes
a proportion of polystyrene or a blend of various polystyrenes from 20 to 98% (wt.),
a proportion of polyvinyl alcohol from 1 to 50% (wt.), and
a proportion of polyether block amide from 1 to 30% (wt.).
14. The method of claim 13, wherein,
a proportion of polystyrene or a blend of various polystyrenes from 55 to 90% (wt.), in particular from 60 to 75% (wt.),
a proportion of polyvinyl alcohol from 5 to 30% (wt.), in particular from 15 to 25% (wt.), and
a proportion of polyether block amide from 1 to 15% (wt.), in particular from 5 to 10% (wt.) is supplied.
15. The method of claim 12, wherein a film thickness of the food film is adjusted in a range from 10 to 50 \u03bcm, preferably from 15 to 25 \u03bcm, preferably at a caliber of up to 90 mm, in particular at a caliber in a range from 15 to 40 mm.
16. The method of claim 12, wherein the plastic blend is selected such that the food film exhibits a water vapor permeability of at least 0.5 kg(m2\xb7day), preferably in a range from 0.5 to 0.75 kg(m2\xb7day), at a film thickness of 20 \u03bcm.
17. The method according to claim 12, wherein the plastic blend is selected such that the food film exhibits an oxygen permeability of at least 4,000 cm3(m2\xb7day), preferably in a range from 4,000 to 6,000 cm3(m2\xb7day).
18. The according to claim 12, wherein the plastic blend is selected such that the food film exhibits a modulus of elasticity of at least 3,000 Nmm2, preferably in a range from 3,000 to 3.600 Nmm2.
19. The method of claim 12, wherein the plastic blend is selected such that the food film can be peeled, preferably in an automated manner, at a velocity of at least 0.4 ms to 1.0 ms, in particular of at least 0.5 ms to 0.7 ms.
20. The method according to claim 12, wherein at least one silicate is added to the plastic blend.
21. The method according to claim 12, wherein at least one filler selected from a group consisting of corn starch, cellulose powder and micro glass beads is added to the plastic blend.
22. The method according to claim 12, wherein at least one filler selected from a group consisting of chalk, talcum, salts and other mineral substances is added to the plastic blend.
23. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the plastic blend includes:
a proportion of polystyrene or a blend of various polystyrenes from 50 to 99% (wt.), and
a proportion of polyvinyl alcohol from 1 to 50% (wt.).
24. The single-layer or multilayer tubular food film that can be smoked, air-dried and of claim 1, wherein the plastic blend includes:
a proportion of polystyrene or a blend of various polystyrenes from 70 to 99% (wt.), and
a proportion of polyether block amide from 1 to 30% (wt.).
25. The single-layer or multilayer tubular food film that can be smoked, air-dried and peeled of claim 1, wherein the food film is a sausage casing for smoked andor air-dried sausage or meat goods.
26. The method of claim 12, wherein the plastic blend includes
a proportion of polystyrene or a blend of various polystyrenes from 50 to 99% (wt.), and
a proportion of polyvinyl alcohol from 1 to 50% (wt.).
27. The method of claim 12, wherein the plastic blend includes
a proportion of polystyrene or a blend of various polystyrenes from 70 to 99% (wt.), and
a proportion of polyether block amide from 1 to 30% (wt.).
28. The method of claim 12, wherein the food film is a sausage casing.
29. The method of claim 12, further comprising filling the food film with sausage or meat goods prior to smoking andor air drying.
30. A composition for manufacturing a tubular food film, said composition comprising a homogeneous molten plastic material, wherein said homogeneous molten plastic material comprises
polystyrene or a blend of various polystyrenes, and
polyvinyl alcohol, andor
polyether block amide.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for manufacturing a hinge barrel, comprising the steps of
providing a raw metal;
fabricating the metal through a first rolling process to form a body which has a base, a bracing portion and a holding trough;
placing a forming strut in the holding trough;
fabricating the body held the forming strut through a second rolling process to make an inner side of the bracing portion in contact with the forming strut to become an arched shape;
treating the body formed with the arched bracing portion and the forming strut through a heat treatment, and cutting the body at a selected length; and
removing the forming strut to form a finished product of the hinge barrel.
2. The method of claim 1, wherein the first rolling process is accomplished through a first rolling machine which has a pair of corresponding first rollers and an upper roller.
3. The method of claim 1, wherein the second rolling process is accomplished through a second rolling machine which has a pair of corresponding second rollers.
4. A method for manufacturing a hinge barrel, comprising the steps of
providing a raw metal;
fabricating the metal through a first rolling process to form a body which has a base, a bracing portion and a holding trough;
placing a forming strut in the holding trough;
fabricating the body held the forming strut through a second rolling process to make an inner side of the bracing portion in contact with the forming strut to become an arched shape;
cutting the body at a selected length and treating the body formed with the arched bracing portion and the forming strut through a heat treatment; and
removing the forming strut to form a finished product of the hinge barrel.
5. The method of claim 4, wherein the first rolling process is accomplished through a first rolling machine which has a pair of corresponding first rollers and an upper roller
6. The method of claim 4, wherein the second rolling process is accomplished through a second rolling machine which has a pair of corresponding second rollers.
7. A hinge barrel comprising:
a body including a bracing portion which has an opening and a base adjacent to the bracing portion, the bracing portion having an arched interior to form a holding trough.
8. The hinge barrel of claim 7, wherein the holding trough has an inner diameter the same as the outer diameter of a forming strut.
9. The hinge barrel of claim 7, wherein the base has a fastening hole.
10. The hinge barrel of claim 7, wherein the bracing portion is asymmetrical.
11. The hinge barrel of claim 7, wherein the body is held in another holding trough of a fastening seat to become an integrated manner.