WO2006029734A1 - Gaine en boyau comprenant une couche exterieure structuree et son utilisation comme enveloppe pour produits alimentaires - Google Patents

Gaine en boyau comprenant une couche exterieure structuree et son utilisation comme enveloppe pour produits alimentaires Download PDF

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Publication number
WO2006029734A1
WO2006029734A1 PCT/EP2005/009502 EP2005009502W WO2006029734A1 WO 2006029734 A1 WO2006029734 A1 WO 2006029734A1 EP 2005009502 W EP2005009502 W EP 2005009502W WO 2006029734 A1 WO2006029734 A1 WO 2006029734A1
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WO
WIPO (PCT)
Prior art keywords
layer
tubular casing
aliphatic
outer layer
copolyamide
Prior art date
Application number
PCT/EP2005/009502
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German (de)
English (en)
Inventor
Wilhelm TÖBBEN
Heinrich Henze-Wethkamp
Original Assignee
Casetech Gmbh & Co. Kg
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by Casetech Gmbh & Co. Kg filed Critical Casetech Gmbh & Co. Kg
Publication of WO2006029734A1 publication Critical patent/WO2006029734A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C13/00—Sausage casings
    • A22C13/0013—Chemical composition of synthetic sausage casings
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C13/00—Sausage casings
    • A22C2013/0053—Sausage casings multilayer casings
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C13/00—Sausage casings
    • A22C2013/0063—Sausage casings containing polyamide, e.g. nylon, aramide
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C13/00—Sausage casings
    • A22C2013/0076—Sausage casings treated in order to be conferred a rough appearance
    • A—HUMAN NECESSITIES
    • A22—BUTCHERING; MEAT TREATMENT; PROCESSING POULTRY OR FISH
    • A22C—PROCESSING MEAT, POULTRY, OR FISH
    • A22C13/00—Sausage casings
    • A22C2013/0083—Sausage casings biaxially oriented

Definitions

  • the present invention relates to a tubular casing for the permanent and wrinkle-free Umhül ⁇ treatment of pasty or liquid goods, in particular food, which has a structuring of the outer shell improved machinability and also has a pleasantly natural look and feel.
  • Seamless plastic covers are often used for wrapping pasty or liquid goods for manufacturing and / or packaging purposes. Typical applications are the use of such casings for the production and / or packaging of scalded and cooked sausages, melted cheese, soups or high-fat pastes. Depending on the product to be produced or packaged, however, extensive specific requirements must be met in order to meet the practical applications.
  • these performance requirements include: good barrier properties, temperature resistance (sterilization temperature> 100 ° C), good adhesion to the product, good clip strength, good tear propagation resistance on hot storage, sufficient shrinkage, high strength, dimensional stability, bounce, good peelability ⁇ hold, easy peelability, good hot and cold cutting behavior, good miscibility especially cold and H constitutionalippipp sadness, ease of assembly, especially Raffberry, good Einfarbles and ink coverage, good printability and safe ink adhesion, no harm according to food law (EU directives, Federal Institute for Risk Assessment BfR, Food and Drug Administration FDA), ecological safety of the materials used.
  • EP-A-0 107 854 describes a tubular, 5-layered laminate consisting of an inner layer of thermoplastic resin, a middle layer of vinylidene chloride copolymer (PVDC), an outer layer of olefin resin and two adhesive layers between the main layers.
  • the shell contains halogenated as a component PVDC, whose use is ecologically questionable and therefore less and less accepted today.
  • DE-A-40 01 612 discloses a tubular, 3-layer coextruded, biaxially stretched sheath having an inner and outer layer of polyamide or a polyamide-containing polymer blend and an oxygen-barrier middle layer of aromatic polyamide or copolyamide.
  • This tubular casing for packaging and wrapping of pasty foods is described.
  • This tubular casing, in particular sausage casing, based on polyamide is characterized in that it consists of an inner and an outer layer of the same polyamide material consisting of at least one aliphatic polyamide and / or at least one aliphatic copolyamide and / or at least one partially aromatic polyamide and / or at least of a partially aromatic copolyamide, a middle polyolefin layer and two of the same material adhesion promoter layers is constructed.
  • the proportion of partially aromatic polyamide and / or copolyamide is 5 to 60%, in particular 10 to 50%, based on the total weight of the polymer mixture of partly aromatic and aliphatic polyamides and copolyamides.
  • WO 03/073862 A2 describes a single-layer or multi-layer food casing made of a thermoplastic mixture containing at least one aliphatic polyamide and / or copolyamide, at least one inorganic and / or organic filler and optionally at least one glycol and / or polyglycol Comprising aliphatic and / or partially aromatic copolyamide.
  • This shell requires special extruders and it is extremely difficult to control the mixing of the described components in such a way that a homogeneous or rather inhomogeneous mixture is produced as required.
  • tubular sheaths described here with regard to the prior art have deficits in individual points in relation to the requirement profile described above.
  • the sheaths known in the market show deficiencies in terms of the characteristics of good barrier properties, good machine and application properties, in particular machinability, mechanical properties, appealing natural look and feel through a permanently structured outer layer.
  • An envelope that fulfills these characteristics is not yet known.
  • a tubular casing comprising an outer layer A consisting of a main component either of an aliphatic homopolyamide or an aliphatic copolyamide or a blend of aliphatic homo- and copolyamide or a blend of aliphatic homo- or copolyamide and a partially aromatic polyamide, wherein said outer layer A has been mechanically treated with an abrasive material.
  • tubular casings according to the invention are preferably seamless and biaxially stretched; they are preferably obtained by coextrusion.
  • the structure of the tubular casing preferably has a total thickness of 5 to 150 .mu.m, more preferably 25 to 80 .mu.m with diameters of the individual layers of 0.5 to 75 .mu.m.
  • tubular casings according to the invention are single-layered, preferably multi-layered, preferably at least three-layer, particularly preferably five-layer tubular casings.
  • tubular casing according to the invention has the following sequence of layers:
  • Layer A outer layer, preferably with the possibility of printing
  • Layer B second outer layer (between outer layer and middle layer)
  • Layer D Second inner layer between inner layer and middle layer
  • Layer E inner layer with contact to the product
  • one or more layers except the outer layer A, which is mechanically treated, may be omitted or added.
  • the outer layer A consists of the main component either of an aliphatic homopolyamide or an aliphatic copolyamide or a blend of aliphatic homo- and copolyamide or a blend of aliphatic homo- or copolyamide and a partially aromatic polyamide.
  • Suitable aliphatic homo- and copolyamides are those polyamides, as described in general terms in Kunststoffhandbuch Part 3/4 "Polyamides" page 22 ff, Carl Hanser Verlag Kunststoff Vienna 1998.
  • the aliphatic polyamide is a homopolyamide of aliphatic primary diamines and aliphatic dicarboxylic acids or a homopolymer of ⁇ -amino-carboxylic acids or their lactams.
  • the aliphatic copolyamide contains the same units and is, for.
  • Example a polymer based on one or more aliphatic diamines and one or more dicarboxylic acids and / or one or different ⁇ -aminocarboxylic acids or their lactams.
  • the aliphatic primary diamines contain in particular 4 to 8 C atoms. Suitable diamines are tetra-, penta-, hexa- and octamethylenediamine, particularly preferred is hexamethylenediamine.
  • the aliphatic dicarboxylic acids contain in particular 4 to 12 C atoms.
  • Suitable dicarboxylic acids are adipic acid, azelaic acid, sebacic acid and dodecanedicarboxylic acid.
  • the ⁇ -aminocarboxylic acid or its lactams contain 6 to 12 C atoms.
  • An example of ⁇ -aminocarboxylic acids is 11-aminoundecanoic acid.
  • lactams are ⁇ -caprolactam and ⁇ -laurolactam.
  • Particularly preferred aliphatic polyamides are polycaprolactam (PA 6) and polyhexamethylene adipamide (PA66).
  • a particularly preferred aliphatic copolyamide is PA 6/66, which consists of caprolactam, hexamethylenediamine and adipic acid units.
  • Partially aromatic polyamides are described in Kunststoffhandbuch Part 3/4 "Polyamides" page 803 ff Carl Hanser Verlag Kunststoff Vienna 1998.
  • the diamine units predominantly or exclusively form the aromatic units, while the dicarboxylic acid units are predominantly or exclusively aliphatic in nature, or the diamine units are predominantly or exclusively aliphatic in nature, while the Dicarbonklareien lake über ⁇ predominantly or exclusively the aromatic Form units.
  • the first embodiment are partly aromatic polyamides or copolyamides in which the aromatic diamine units consist of m-xylylenediamine and phenylenediamine.
  • the aliphatic dicarboxylic acid units of this embodiment usually contain from 4 to 10 carbon atoms, such as e.g. Adipic acid, sebacic acid and azelaic acid.
  • aromatic diamine units and the aliphatic dicarboxylic acid units may also be present in amounts of up to 5 mol% each.
  • a particularly preferred embodiment consists of m-xylylenediamine and adipic acid units.
  • This polyamide PA-MXD6
  • MX-Nylon m-xylylenediamine and adipic acid units.
  • PA-MXD6 polyamide
  • MX-Nylon polyamide
  • the aromatic dicarboxylic acids in particular isophthalic acid and terephthalic acid are to be emphasized.
  • aromatic diamine units and aliphatic dicarboxylic acid units it is also possible for aromatic diamine units and aliphatic dicarboxylic acid units to be present in amounts of up to 5 mol% each.
  • a particularly preferred embodiment consists of units of hexa-methylenediamine, isophthalic acid and terephthalic acid.
  • This polyamide (PA6I / 6T) is z. B. sold by the company. DuPont De Nemours under the name Selar PA.
  • the addition of partly aromatic polyamide PA6I / 6T is preferably carried out in amounts of between 2 and 40% by weight per layer, in particular between 5 and 20% by weight.
  • the addition of partially aromatic polyamide PA-MXD6 is preferably carried out in amounts between 5 and 40 wt .-% per layer, in particular between 10 and 30 wt .-%.
  • layer A may include additives such as lubricants, antiblocking agents, nucleating agents, fillers and color pigments or a mixture of these.
  • the layer A can be printed with and without abrasive pretreatment.
  • the second outer layer B present in the above-described five-layered embodiment consists, for example, of an approximately completely hydrolyzed ethylene-vinyl acetate copolymer (EVOH) having an ethylene content of 25 to 53% by weight, preferably of 29 to 38% by weight.
  • EVOH ethylene-vinyl acetate copolymer
  • the layer thickness is usually between 2 and 30 ⁇ m, in a preferred embodiment between 2 and 8 ⁇ m, particularly preferably between 3 and 6 ⁇ m.
  • layer B may consist of the polymers and additives mentioned in the description of layer A or layer D, but may also have a different composition than layer A or be omitted altogether.
  • the middle layer C present in the five-layer embodiment described above consists for example of the polymers and additives mentioned in the description of layer A, but optionally has a composition other than layer A or may optionally be of polyolefin homopolymer or copolymer or a blend of these a melting point of the lowest melting component of at least 110 0 C. If desired, layer C can also consist of the polymers and additives mentioned in the description of layer B, but if appropriate have a composition other than layer B or be omitted altogether.
  • the second inner layer D located between the middle layer C and the inner layer E, which is present in the five-layer embodiment described above, is, for example, an adhesion-promoting layer. This consists preferably of modified polyolefins.
  • modified homopolymers and copolymers of ethylene or propylene and optionally further linear ⁇ -olefins having 3 to 8 C atoms the monomers from the group of ⁇ , ⁇ -unsaturated dicarboxylic acids, such as maleic acid, fumaric acid, Itaconic acid or its spearure ⁇ anhydrides, acid esters, acid amides or rampureimide grafted included.
  • the layer thicknesses are usually between 1 and 30 ⁇ m and in a preferred embodiment between 1 and 6 ⁇ m.
  • layer D may consist of the polymers and additives mentioned in the description of layer A or B, but if appropriate have a composition other than layer A or B.
  • the inner layer E present in the above-described five-layered embodiment consists for example of the main component of the polymers and additives mentioned in the description of layer A, but optionally has a different composition than layer A.
  • the layer may also contain other substances, preferably color pigments. keep ent.
  • the preferred layer thickness of the layer E is less than 10 ⁇ m.
  • the tubular casing according to the invention can furthermore optionally contain a layer of natural fibers with a fiber length in the range of 5 to 10,000 ⁇ m and / or a natural fiber mixture of different fiber types and / or fiber lengths.
  • additives may be added.
  • antiblocking and slip additives have proven to be suitable. These antiblock additives are based e.g. based on silica.
  • the inorganic ultrafine pigment is introduced into the composite by means of a masterbatch whose carrier material is compatible with the base material of the layer.
  • the amount of pigment is usually at 0.1 to 5 wt .-%, preferably 0.5 to 2.5 wt .-% based on the total weight of the tubular casing.
  • the mechanical treatment of the outer layer can be carried out with the aid of compressed air and an abrasive blasting medium.
  • Suitable abrasives are a wide variety of materials that must be adapted to the material of the layer A in order to achieve the desired effect.
  • materials which are capable of mechanically changing the outer layer of the hose are suitable.
  • a blasting agent in this case a mixture of noble corundum and / or electric corundum and / or special steel corundum and / or glass beads and / or glass bead and / or nutshell granules and / or corncob and / or plastic granules and / or cast steel blasting round and / or cast steel abrasive edged and / or cast steel abrasive round stainless and / or steel wire grain cylindrical and / or steel wire grain rounded and / or steel wire grain cylindrical rust resistant and / or steel wire grain rounded rust resistant and / or hard cast blasting abrasive round and / or hard cast blasting abrasive edged and / or malleable shot blasting abras
  • a fine grain size of the blasting material preferably special steel corundum, in the range between 0.05 .mu.m to 500000 .mu.m is suitable. Particularly suitable is a range between 5 .mu.m to 5000 .mu.m, in particular a range between 50 .mu.m to 25 .mu.m.
  • the jet duration and the jet pressure depend on the type of plastic hose and the take-off speed and must be set individually. However, it has been shown that with increasing withdrawal speed of the internal pressure and the jet pressure must be increased.
  • blasting agents are suitable, which permanently deform the surface by means of suitable technology.
  • suitable technology include sodium bicarbonate ("baking powder") based powders such as, for example, “Armex Blast Media” from the manufacturer “Brotherton Specialty Products Limited”, which is sold in the industry for cleaning work, and the material has a density of about 2 , 16 g / cm 3 and can be used in various size distributions
  • Baking powder sodium bicarbonate
  • Armex Blast Media from the manufacturer "Brotherton Specialty Products Limited
  • the material has a density of about 2 , 16 g / cm 3 and can be used in various size distributions
  • the tubular casing according to the invention usually has a free shrinkage in at least one orientation direction measured in a water bath at 100 ° C. after 15 minutes between 1 and 35%, in particular between 2 and 20%.
  • the invention furthermore relates to a process for the production of the tubular casing according to the invention with improved machinability comprising the step of forming the outer layer A of a preferably at least three-layer, more preferably five-layer tubular casing having an outer layer A consisting of an aliphatic homopolyamide or an aliphatic copolyamide as main component or a blend of aliphatic homo- and copolyamide or a blend of aliphatic homo- or copolyamide and a partially aromatic polyamide is mechanically treated with an abrasive material.
  • the production of the tubular casing according to the invention is preferably carried out by an extrusion process.
  • the fibrous, granular or powdered raw material is compressed in an extruder, melted, homogenized and discharged through a nozzle and formed into a seamless tube.
  • the exiting primary tube is cooled by air or water cooling and then simultaneously biaxially stretched.
  • a particularly suitable method is the simultaneous biaxial stretching by means of double-bubble technology, in which the stretching of the primary bubble takes place via an adjacent internal pressure.
  • the shell can then be subjected to a heat treatment.
  • the tubular casing according to the invention is preferably biaxially stretched with a degree of planar stretching of 4 to 10 and more preferably of 6 to 10, since in this flatness degree the fiber orientations cause a particularly high tear propagation resistance with very positive peeling behavior.
  • a particularly good printability is made possible at these flatness levels, as well as an excellent bumpiness and cylindricity of the finished sausage achieved.
  • the mechanical treatment of the outer layer of the tube can be integrated in the abovementioned process sequence, or can be carried out separately after the production of the tube.
  • the sand blasting method is preferably used, which allows both discontinuously (sections) and continuously (rolls) to treat the goods. From an economic point of view, continuous operation is preferred, it being possible to machine both flattened and inflated goods. It was surprising in this type of treatment that the mechanically treated outer layer was still present even after brewing at high temperatures. Surprisingly, by a suitable choice of the jet parameters (blasting medium, grain size, pressure, air flow, nozzle head and the like), the somewhat soft inflated product could be treated without any problems and over the entire surface without any defects.
  • the coefficient of static friction ⁇ H is determined by Columbus' law through the roughness and the types of substances of the rubbing surfaces. In the case of stiction, there is no relative movement between the friction partners plastic / steel or plastic / plastic.
  • the sliding friction (kinetic friction) F GL depends on the normal force F N and on the coefficient of sliding friction ⁇ ⁇ 3L and is always smaller than the static friction F H. It depends on the relative speed of the rubbing surfaces (plastic / steel or plastic / plastic).
  • the hose Due to the filling pressure applied when filling the hose, the hose is pressed against the casing brake and braked depending on the size of the friction coefficients. Since this process is a discontinuous process, static friction prevails during start-up and sliding friction during filling. If the static friction is significantly greater than the sliding friction, it can lead to Kali ⁇ berschwankungen by different frictional forces during automatic filling of the hose. The lower the static friction deviates from the sliding friction, the closer the process tolerances can be maintained. This is of utmost importance for the industrial use of the sausage casing. As a measure of the quantitative assessment of these relationships, the ratio between slip and static friction coefficient can be used. This variable represents the difference between the two types of rubbing and approaches 1 for equal values. With the help of this ratio, an improved assessment of start-up processes in discontinuous process management, such as in Filling machines, be made. This ensures favorable process control in narrow tolerance ranges, the closer this ratio approaches the value 1.
  • the caliber constancy is of decisive importance for the dimensional accuracy of the finished sausages.
  • the standard deviation ⁇ can be used, which is a measure of the scattering.
  • the standard deviation of a given data set is defined as the square root of the variance, ie the arithmetic mean of all quadratic deviations of the data from its arithmetic mean:
  • the expected value is the recommended filling caliber (EFK), which corresponds to the mean value for a statistically validated data volume.
  • the cylindricity is important for the dimensional stability of the finished sausage and is determined by the caliber difference between the sausage diameter top, middle and bottom.
  • the standard deviation ⁇ can also be used.
  • the haptic and optical properties of the shell produced resembled those of a natural fiber intestine with and without a barrier layer in a more economical production.
  • the barrier properties of the hose could be maintained.
  • An oxygen barrier when stored, is known to prevent premature graying of the meat facing the inside of the casing.
  • the water vapor barrier behin ⁇ in storage known to the induced by evaporation of water from the product weight loss of the merchandise, on the one hand reduces the proceeds of the product and on the other hand can lead to wrinkled unsightly products due to volume shrinkage.
  • Another object of the invention is the use of the tubular casing according to the invention as a wrapper for pasty or liquid products.
  • the use of a seamless tubular casing according to the invention is preferred.
  • the particular advantage of a seamless tubular casing is that a continuous, spiral-shaped peeling of the sausage is possible without being restricted by defects such as, for example, a connecting seam.
  • the visual and haptic impression, the barrier properties and the mechanical integrity in the production of sausage, for example, the seamless tubular casing is excellent without being affected by a seam.
  • the tubular casing according to the invention is used for packaging of sausages, pet food, cheese, dough or soups.
  • Layer A 100% PA6 / 66 (Ultramid C35F from BASF) with a layer thickness of 8 ⁇ m.
  • Layer B -
  • Layer E 93% PA 6 (Durethan B40F Fa. Bayer) and 7% antiblocking agent with a layer thickness of 7 ⁇ m.
  • the tube was formed on three single-screw extruders via a ring nozzle to a primary tube.
  • the tube was rapidly cooled, then heated to the minimum temperature required for stretching, strongly biaxially stretched by means of internal compressed air, and then thermofused in another heating zone.
  • the tube could be adjusted by the thermal oxidation in its mechanical properties and had an average wall thickness of 30 microns.
  • a multi-layer seamless tubular casing consisting of the following 5 layers:
  • Coextrusion nozzle in tube form transferred.
  • the tube was rapidly cooled, then heated to the minimum temperature required for stretching, biaxially stretched by means of compressed air acting internally and then thermofused in another heating zone.
  • the hose could be adjusted by the heat setting in its mechanical properties and had an average wall thickness of 49 microns.
  • Layer A 100% PA6 / 66 (Ultramid C35F from BASF) with a layer thickness of 8 ⁇ m (outer layer treated)
  • Layer B Layer e: 90% PA6 / 66 (Ultramid C35F from BASF) + 10% color masterbatch brown with one
  • Layer E 93% PA 6 (Durethan B40F Fa. Bayer) and 7% antiblocking agent with a layer thickness of 7 ⁇ m.
  • the tube was formed on three single-screw extruders via a ring nozzle to a primary tube.
  • the tube was cooled rapidly, then heated to the minimum temperature required for stretching, strongly biaxially stretched by means of internal compressed air and then heat-set in another heating zone.
  • the tube could be adjusted via the heat setting in its mecha ⁇ African properties and had an average wall thickness of 30 microns.
  • the layer A was sandblasted with special steel corundum with a size of about 150Dm to 250Qm.
  • a multi-layer seamless tubular casing consisting of the following 5 layers:
  • a multi-layer seamless tubular casing consisting of the following 5 layers:
  • the tube was plasticized and homogenized on 5 single-screw extruders and converted into a tube by means of a 5-layer coextrusion die.
  • the tube was rapidly cooled, then heated to the minimum temperature required for stretching, biaxially stretched with the aid of internally acting compressed air and then heat-set in a further heating zone.
  • the tube could be adjusted by the heat-setting in its mechanical properties and had an average wall thickness of 49 microns.
  • the layer A was sandblasted with special steel corundum with a size of about 100 .mu.m to 350 .mu.m.
  • the static friction (friction) F H depends on the normal force F N and on the coefficient of static friction ⁇ H , on the other hand independent of the size of the contact surface.
  • the static friction coefficient ⁇ H is determined by Columbus' law through the roughness and the types of substances of the rubbing surfaces. In the case of stiction, there is no relative movement between the friction partners plastic / steel or plastic / plastic.
  • the static friction coefficient is determined in accordance with DIN 53375.
  • the sliding friction (movement friction) F GL depends on the normal force F N and on the sliding friction coefficient ⁇ o L and is always smaller than the static friction F H. It depends on the relative speed of the rubbing surfaces (plastic / steel or plastic / plastic). The determination of the sliding friction takes place according to DIN 53375.
  • Ratio ⁇ r to ⁇ H The ratio between slip and static friction coefficient lies between O and 1. This variable represents the difference between the two types of friction and approaches the value 1 for equal values of both friction mechanisms. With the aid of this ratio, an improved assessment of startup processes in discontinuous process management, such as, for example, in filling machines, can be carried out. This ensures favorable process control in narrow tolerance ranges the closer this ratio approaches the value of 1.
  • Caliber constancy Caliber consistency is critical to the dimensional accuracy of finished sausages.
  • the standard deviation ⁇ is used, which is a measure of the scattering.
  • the standard deviation of a given data set is defined as the square root of the variance, ie the arithmetic mean of all squared deviations of the data from their arithmetic mean:
  • the expected value is the recommended filling caliber (EFK), which corresponds to the mean value for a statistically saved data quantity.
  • the scope of the data set during testing was 100 sausages per tested caliber.
  • Cylindricity The cylindricity is important for the dimensional accuracy of the finished sausage and is determined by the caliber difference between the sausage diameter above, middle and below. To assess the cylindricity, the standard deviation ⁇ is also used.
  • Water vapor permeability according to ASTM F1249-01 at a temperature of 23 0 C and a relative humidity of 85%. The value indicates the amount of water vapor in grams, which passes through a 1 m 2 area of the casing to be tested for one day (24 hours) under the specified test conditions.
  • Oxygen permeability The determination of O2Du according to DIN 53380 Part 3 at a temperature of 23 0 C and a relative humidity of 75%. The value indicates the volume of oxygen in milliliters which, at an oxygen partial pressure of 1 bar, passes through a 1 m 2 surface of the casing to be tested for one day (24 hours) under the given test conditions.
  • the casings to be tested are filled to the brim with a commercially available filling machine with test material susceptible to oxidation (test sausage based on cooked sausage), closed on both sides by a clip. After weighing the sausages obtained, they are stored in a refrigerated storage room at ⁇ 4 ° C. After 20 days, the sausages are weighed again, with the percentage weight loss being the ratio of the difference in weight before and after storage to weight before storage (school grade principle).
  • Peeling properties it was evaluated how easily the casing could be peeled off after cutting and how good the peeling behavior (for example change of direction when peeling) was (school grade principle).

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Food Science & Technology (AREA)
  • Processing Of Meat And Fish (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne une gaine en boyau permettant de recouvrir dans la durée et sans plis des biens pâteux ou liquides, en particulier des produits d'alimentation, qui présentent une bonne marche dans les machines améliorées grâce à une organisation de la gaine extérieure et disposent d'une optique et d'une haptique agréables.
PCT/EP2005/009502 2004-09-16 2005-09-03 Gaine en boyau comprenant une couche exterieure structuree et son utilisation comme enveloppe pour produits alimentaires WO2006029734A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004044828.0 2004-09-16
DE200410044828 DE102004044828A1 (de) 2004-09-16 2004-09-16 Schlauchhülle mit strukturierter Außenschicht sowie deren Anwendung als Nahrungsmittelhülle

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WO2006029734A1 true WO2006029734A1 (fr) 2006-03-23

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Citations (9)

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EP0107854A2 (fr) 1982-10-29 1984-05-09 Kureha Kagaku Kogyo Kabushiki Kaisha Film laminé composite thermorétrécissable et son procédé de fabrication
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EP0610753A1 (fr) * 1993-02-10 1994-08-17 Wolff Walsrode Aktiengesellschaft Laquage multicouche d'enveloppes tubulaires cellulosiques
DE4339337A1 (de) 1993-11-19 1995-05-24 Becker & Co Naturinwerk Fünfschichtige, biaxial verstreckte Schlauchfolie zur Verpackung und Umhüllung von pastösen Lebensmitteln
EP0879560A1 (fr) 1997-05-21 1998-11-25 Kalle Nalo GmbH & Co. KG Enveloppe multicouche orienté biaxialement pour aliments contenant deux couches barrières à l'oxygène
EP1084962A2 (fr) * 1999-09-14 2001-03-21 Wolff Walsrode AG Feuille multicouche synthétique étirée biaxialement pour boyaux de saucisses avec barrière à oxygène
EP1186237A1 (fr) * 2000-09-06 2002-03-13 Victus Lebensmittelindustriebedarf Vertriebsgesellschaft mbh Film tubulaire multicouche à base de polyamide
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EP1186237A1 (fr) * 2000-09-06 2002-03-13 Victus Lebensmittelindustriebedarf Vertriebsgesellschaft mbh Film tubulaire multicouche à base de polyamide
DE10208858A1 (de) * 2002-03-01 2003-09-11 Kalle Gmbh & Co Kg Rauch- und wasserdampfdurchlässige Nahrungsmittelhülle aus einem thermoplastischen Gemisch
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