DE2051788A1 - packing material - Google Patents

Description

W.R. Grace & Co (USA 882 97-4 - prio December 8, 1969

New York, NY, V.St.A. ΑΛ5969. - 729 *)

3, Hanover Sqare Hamburg, October 21, 1997

Packing material .

The present invention also relates to one at the Packaging and in particular the packaging of pieces of meat that have not yet been detached from the bones.

The use of shrink film for packaging food including meat is well known; at the The packaging of sharp objects or meat with bone fragments results in difficulties with flexible foils, provided that the sharp or protruding parts or bones of the product to be packaged do not have a covered with wax coated cloth, as described, for example, in US Pat. No. 2,891,870 is. The use of a cloth coated with wax in this way results in, for example, still Unbone pieces of meat up to $ 85 Losses due to holes or other damage in the packaging material. The use of one cushioning material such as paper, paper laminates, cloths or other plastics is unsuitable and has so far been

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cannot eliminate the difficulties.

You can remove or level out the bones of pieces of meat, but this is only feasible in a few cases and in any case is time consuming and uneconomical.

From the wax-coated cloths have become only those according to US Pat. No. 2,891,870 are available on the market

»Prevailed from an unbleached muslin cheesecloth exist.

According to the invention, a packaging material is proposed, which consists of a cloth substrate impregnated with wax consists of non-woven synthetic fibers that are interconnected.

Further according to the invention, a package, it is proposed that includes an object having projecting sharp Ψ and / or bony surface regions of a shrinkable or shrunk under heat plastic ■ film has, surrounding the object, and a backing of the above-mentioned wax impregnated cloth, the

covered the sharp and / or bony parts of the object Such synthetic. Fibers can be made from rayon, olefins, polyesters, amides and similar compounds be made. '

In particular, a non-woven fabric is made from synthetic Fibers bonded together, preferably with a petroleum paraffin or food grade wax coated. This wax-impregnated cloth is placed over the object, for example a bone to be protected, placed and molded the cloth itself to the surface of the object. The packaged goods protected in this way, for example a piece of meat with a bone, is then placed in the shrink bag, which is evacuated and on usual Way is shrunk under the action of heat.

In the following the invention will be explained in more detail with reference to drawings. Show it

Fig. 1 is a perspective view of a piece of meat in a shrink bag with a correspondingly arranged cloth;

FIG. 2 is a view analogous to FIG. 1, but now the piece of meat has not yet been placed in the bag with a cloth;

FIG. J> a section along the line 3-3 according to FIG. 1;

4 shows a partial view of the cloth impregnated with wax with a cover made of shrink film;

FIG. 5 shows a section along the line 5-5 according to FIG. 4; FIG.

Fig. 6 is a partial view of the nonwoven made of interconnected synthetic fibers Before being impregnated with wax.

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Like Pig in particular. J5 shows that the piece of meat 2, for example a leg of lamb, has not yet separated from the bone, protruding bone parts # and 6. The cloth 8 made of synthetic filaments, for example a cloth made of fine individual threads, is impregnated and coated with a low-melting petroleum wax or paraffin . The wax-coated cloth 11 is then placed over the bones 4 and 6 and deformed h so that it adapts to the shape of the bone. In contrast to plastic sheeting or similar materials, this cloth essentially retains its new shape and does not stand out. As a result, the subsequent introduction of the object, ill. the bag 12 facilitated. After the bones are adequately protected by the wax-coated cloth, the meat is placed in a ettjas. larger bag _t au brought s shrinkable plastic film '. "The kuft is then leütel pushed out in a conventional manner, in. the. or evacuated, after which the open end is sealed, and for example by sealing with a sealing jaw or by twisting and knotting of the neck part or by clipping it * The closed pack is then ^{heated, for example, to 85 to IjDQ 0} Q- so that the bag shrinks around the meat. This shrinkage can be done in the usual way by placing the closed pack in hot water appropriate

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given temperature.

During the shrinkage, the heat becomes the low melting sticky wax softens and causes firm adhesion between the packaging film and the coated one Cloth. Any destruction of the film caused by the bone, for example, is thus self-sealing of the coated cloth. When a penetration point occurs, the plastic film adheres firmly prevents the film from relaxing or tearing further on the wax surface. Entry of air will with. in other words, by the adhesion of the wax to the protruding bone fragment and to the pouch in the area prevents damage.

The wax-coated cloth can be used in conjunction with soft or damp products, such as for example for ham, turkey quarters and meat slices, so that the flexible packaging material of Sheets as bags or in other forms can be used for packaging and sealing without difficulty can. The coated cloth acts as a support surface or underlay and also gives the product the necessary information Strength. Sealing can be done without difficulty, in particular with film webs Because of the wax coating, even when it is damp or soft Products. The heat of the seal results in a firm bond

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between foil and wax.

The use of wax-coated cloths is particularly suitable for meat with bones, such as for chops, legs of lamb, ham, lamb chops, pork chops and veal chops.

Heat-shrinkable films can be used as shrink films; Vinylidene chloride films and films made from shrinkable ^ Rubber hydrochloride, - polyolefins, such as polyethylene and Polypropylene, polyethylene terephthalate and the like are used will.

The wax used is a product which is approved or tolerated by food law, which has a low melting point of, for example, 66 to 70 ° C., is sufficiently sticky, is flexible at cooler temperatures of, for example, 0 to 15 ° C. and which is on the market without difficulties A typical wax is petroleum paraffin No. 56II8, which according to ASTM D127-49 has a melting point between 67 and 70 ⁰ C, according to ASTM D88-53 a viscosity. of 13.7 to 15.5 cps at 99 ° C, which is amber and has a maximum penetration value of 25 to 25 C- according to ASTM D1321-55T, which is tasteless ¹ and odorless and a minimum flash point according to ASTM D92-52 of 260 ° C and an API,

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Has density according to ASTM D287-55 from J $ to 35.

The tack of the wax at normal room temperatures at which meat is packaged, thus improve the range between 4 and IJ ⁰ C, one can fix the wax preferably a plasticizer. As the plasticizer, the product Hereolyn D in amounts of from 5 to 10 wt.% For example, can be used.

Instead of petroleum waxes or paraffins, other non-toxic types of wax with a suitable melting point can also be used be used.

It has been found that nonwoven cloths are made from very fine synthetic fibers with a very small open area Porosity in the area of the entire cloth results in excellent flexibility and foldability, whereby through the almost complete covering with fibers only a small possibility for bone splinters, unhindered to step through the narrow fibers of the cloth. Because the non-woven fibers in the event of an injury can only be displaced or displaced by a bone fragment and not a thread, as is the case with woven material tears and a large hole is created or the cloth is not even in other areas is affected, such cloths made of nonwoven fibers are particularly advantageous, especially if the

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Distribution of the individual pasers is even. Preferably one uses tightly pressed, non-woven mat-like cloths. These mat-like or fleece-like Fiber cloths also allow a good impregnation with wax in the interstices of the fibers. the However, the total amount of wax used to impregnate the tightly pressed surface of the nonwoven material is substantial less compared to a less densely compressed material. The wipes preferably have one Thickness less than 0.25 and preferably less than 0.15 mm.

As shown in Figure 6, the preferred nonwoven synthetic fiber cloth is made from perforated spunbond and glued cloth with numerous relatively close adjacent perforations or spaces 13, which in consistency at your widest Dimension 0, J0 to 0, ^ 8 mm wide. This allows the Wax layer on opposite surfaces of the cloth are in contact with one another. Cloths are best suitable from spun and bonded olefin fibers made from high density polyethylene, which are characterized by a uniform Spinning and binding processes into a uniform product are connected. This cloth will be even or duroh

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random distribution of very fine continuous fibers with a dimension of 0.002 to 0.02 mm in their smallest dimension, whereby the fibers are connected to one another by heat and pressure. It will no binders, extenders or fillers or sizing agents are used and the material is not coated or provided with antistatic additives so that it can be used without hesitation under food law can be. Such a Tuoh is sold, for example, under "the trade name" Tyvek "and consists of

100 % polyethylene. Each 2787I dm of this Tuohes are coated with 27.2 to 56.5 kg of wax, whereby up to 40.8 kg can be used in special cases. This wax weight includes wax additives such as plasticizers. The cheesecloths impregnated with wax

calling on the other hand about 45 kg or more wax depending 27,871 dm Moreover sheet of the invention is less heavy, less bulky and requires a lower growth ä impregnation than the previously known tissue, such as cheese cloth and the like.

The synthetic fiber cloth of the invention must be physically and chemically compatible with the wax so that a sturdy, protective cloth is obtained when packaging meat and other products. That

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rait wax impregnated cloth is said to be essentially odor free be easy to separate into strips, have good strength, show good expandability and the adhesion of the wax surface to the wax surface of adjacent or applied strips should also to be possible. The so-called unfoldability of the wax-impregnated cloth is important so that these cloths can be used can form well on the protruding bones and leave it in this place without the material springing back again. This is necessary at least as long as the piece of meat protected in this way is out of the bag Shrink film is introduced. Furthermore, the cloth pad should not be used under normal storage conditions or with Separate use after impregnation with wax. It is important that the impregnated cloth is on a roll can be wound up and can be unrolled or peeled off from this after storage without the fibers of the non-woven cloth separate. Accordingly, it is necessary that fibers be retained in the cloth or bound to one another and remain in this unity with sufficient persistence or strength and a Form cloth, even after the Waohimpregnation.

Usually the wax impregnated cloth is sold in the form of a roll so that you can get the necessary

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Cut lengths to cover the protruding parts. In order to prevent sticking after the cloth has been impregnated with wax, the wax is strongly cooled when the finished impregnated cloth is wound up, for example to a temperature below 24 C. A roll of a cloth impregnated with wax with a length of 91 m has a roll core 7.6 cm in diameter has an overall diameter of about 12 to 15 cm.

The wax impregnated cloth is preferably used at lower temperatures and preferably below 24 ° C stored. Prolonged storage at higher temperatures leads to a softening of the wax and to sticking of the layers so that unwinding is difficult, and in some cases the fibers also become detached from the cloth which leads to irregular hair-like threads of up to 10 cm in the spun and connected cloth and protrude more from the surface. The preferred wax mentioned above can be used with the preferred cloth made of olefin fibers between freezing temperatures up to 24 C can be handled without difficulty. Above from 24 ° C the material becomes soft and at 38 to 46 ° C liability begins. By changing the proportions of the various substances in wax, the wax can also be harder be adjusted, eo that a product more suitable for hot seasons or for the tropics is obtained.

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Claims (6)

Claims Cl) packaging material consisting of a cloth impregnated with wax, characterized in that the cloth consists of non-woven synthetic fibers which are connected to one another. 2. Packaging material according to claim 1, characterized in that the synthetic fibers in their entirety remain unchanged as a cloth when strips of the cloth are unwound from a roller. 3. Packaging material according to claim 1 to 2, characterized in that the fibers are spun and glued are, are firmly pressed together to form a mat and that the olefin fibers in their smallest dimension Are 0.002 to 0.02 mm in size. 4. Packaging material according to claim j3, characterized in that the cloth is less than 0.25 mm thick and has perforations whose diameter is 0.5 to 0.38 mm and that the wax in the cloth in an amount of 27.2 up to 36.3 kg per 27871 dm ^{2 of} untreated cloth is present. 109825/1233 5 · Packaging consisting of an object such as a piece of meat that has not been detached from the bone with protruding sharp and / or bony surface areas, a heat shrinkable or shrunk plastic material that makes up the object surrounds, characterized in that a cloth according to claim 1 to 4 the protruding and / or bony Covering areas of the object. 6. Packaging according to claim 5 »characterized in that that the wax impregnated cloth around the protruding sharp and / or bony areas of the object is shaped. 109825/1233 Blank page