SE192992C1

SE192992C1 -

Info

Publication number: SE192992C1
Authority: SE
Publication date: 1964-01-01

Description

Uppfinnare: WE Underwood och R J Signer Prioritet be yard fly& den 12 oktober 1955 (USA) Foreliggande uppfinning avser Mien for kottindustrien. I synnerhet avses overdragna holjen och ett satt att framstalla dessn. Det finns flera anvandningsandamal fOr hOlj en inom kottindustrien, dar lag genomslapplighet for vattenanga i forening med eller titan lag genoms15.pplighet for syre ãr av storsta betydelse. Tva sadana anvandningsandamal aro leverkorv och malet kott. Saranfilm liar med framgang anvants for leverkorv och i viss utstrackning for farskmalet kott, pa grund av dess egenskaper med avseende pa genomslappligheten av vattenanga och gas. Saranfilin har emellertid icke varit belt tillfredsstallande fiir dessa anvandningsandamal, I synnerhet beroende pa svarigheten att bibehalla kontrollen over storleken, ofta forekommande brott pa filmen pa grund av sprifdhet (i synnerhet vid laga temperaturer) samt svarigheterna att med kniv skara saranforpackade livsmedel i skivor. Inventors: WE Underwood and R J Signer Priority be yard fly & October 12, 1955 (USA) The present invention relates to the Mien for the meat industry. In particular, it refers to the coated casing and a method of producing the same. There are several uses for oil in the cone industry, where law permeability to water vapor in conjunction with or titanium law permeability to oxygen is of paramount importance. Two such uses are liver sausage and minced meat. Saran film has been successfully used for liver sausage and to some extent for freshly ground meat, due to its properties with respect to the permeability of water vapor and gas. However, saranfilin has not been very satisfactory for these uses, in particular due to the responsibility to maintain control over the size, frequent breakage of the film due to fragility (especially at low temperatures) and the difficulty of cutting saran-packed foods into slices with a knife.

Ett andamal med foreliggande uppfinning Or att astadkomma ett holje fOr kottindustrien, vilket holje liar en fast vidhaftande belaggning och kannetecknas av lag genomslapplighet for fuktighet. Ett annat andamal Or att astadkomma ett overdraget holje for kottindustrien, som liar tillracklig hallfasthet for aft motstã spanningar och benagenhet att andra dimensioner, som uppkommer vid stoppning av holjet med kottprodukter, vid hanteringen och fortsatt behandling av f8rpackningen. Ett annat andamal Or att astadkomma ett Overdraget holje for kottindustrien, som kan behandlas tillfredsstallande vid laga temperaturer, samt ett holje, som, nar det stoppats, latt kan skaras i skivor. Vi-dare avses att astadkomma ett salt att framstalla overdragna holjen med ovanstaende egenskaper. Ytterligare andamal framga. av det foljande. An object of the present invention is to provide a casing for the cone industry, which casing has a solid adhesive coating and can be characterized by low permeability to moisture. Another object is to provide a coated casing for the meat industry, which has sufficient rigidity to withstand stresses and propensity to other dimensions, which arise when stuffing the casing with meat products, during the handling and further processing of the packaging. Another purpose is to provide a coated casing for the cone industry, which can be treated satisfactorily at low temperatures, and a casing which, when stopped, can be easily cut into slices. Furthermore, it is intended to provide a salt to produce the coated casing having the above properties. Additional spirits emerge. of the following.

Dessa andamal uppnas allmant genom att pafOra en tuna, kontinuerlig belaggning av ett vinylidenharts pa hela den yttre ytan av en slang pa cellulosabas och darefter gynna vidhaftningen till och bildningen av en kontinuerlig belaggning pa slangbasen genom att underkasta den belagda slangen i uppblast tillstand en tillrackligt hog temperatur for att sintra hartset, dvs. bringa det att flyta och sammansmalta for att bilda en kontinuerlig belaggning och vidhangande fasta direkt pa slangunderlaget men lac till sa hog temperatur, att sjalva slangen eller belaggningen skadas. These purposes are generally achieved by applying a thin, continuous coating of a vinylidene resin to the entire outer surface of a hose on a cellulosic base and then promoting the adhesion to and formation of a continuous coating on the hose base by subjecting the coated hose in an inflated condition to a sufficiently high temperature for sintering the resin, i.e. cause it to float and melt together to form a continuous coating and adhering solids directly on the hose substrate but leave at such a high temperature that the hose or coating itself is damaged.

Nar belaggningen erhalles genom paforande av en belaggningsblandning innehallande en vatskebarare uppvarmes den belagda slangen, foretradesvis i uppblast tillstand, pa lampligl sat f Or att giva en i huvudsak klibbfri belaggning fore sintringssteget. When the coating is obtained by applying a coating mixture containing a liquid carrier, the coated hose is heated, preferably in an inflated state, in a lamp-like manner to give a substantially tack-free coating before the sintering step.

Med >>vinylidenharts>> avses de filmbildande hartser, vilka erhallas genom interpolymerisation av polymeriserbara polymerer, av vilka minst en innehaller vinylidengruppen. Allmant kunna filmbildande vinylidenhartser, vilka i polymermolekylen innehalla minst 5 vildprocent vinylidenklorid, anvandas. SA kan t. ex. anvandas vinylidenklorid, polymeriserad med sadana amnen som vinylacetat, vinylpropianat, vinylkloracetat, vinylklorid, vinylbromid, alkylakrylat eller metakrylat s0som en metyl-, etyl-, propyl-, butyl-, isobutyl-, metoxyetyl, kloretyl-, oktyl-alfa-kloro-, eller 2-nitro-2-matylpropyl-ester, metylvinylketon, metylisopropenylketon, akrylonitril, metakrylonitril, styren, vinylnaftalin, etylvinyleter, butylvinyleter, N-vinylftalimid, N-vinylsucci- 2— — nimid, N-vinylkarbazol, metylendietylmalonat, itakonsyra osv. eller blandningar av tva eller flera av dessa foreningar. Typiska och representativa exempel pa foredragna vinylidenhartser, vilka kunna anvandas, aro foljande: 80 % vinylidenklorid — 20 % akrylonitril % vinylidenklorid — 50 % vinylacetat % vinylidenklorid — 70 % vinylklorid % vinylidenklorid — 95 % vinylklorid 80vinylidenklorid — 10 % vinylacetat % vinylklorid 70 c,-; vinylidenklorid — 15 % vinylacetat % akrylonitril. By "vinylidene resin" is meant the film-forming resins obtained by interpolymerizing polymerizable polymers, at least one of which contains the vinylidene group. Generally, film-forming vinylidene resins which contain at least 5% by weight of vinylidene chloride in the polymer molecule can be used. SA can e.g. vinylidene chloride is used, polymerized with such substances as vinyl acetate, vinyl propianate, vinyl chloroacetate, vinyl chloride, vinyl bromide, alkyl acrylate or methacrylate or 2-nitro-2-methylpropyl-ester, methyl vinyl ketone, methyl isopropenyl ketone, acrylonitrile, methacrylonitrile, styrene, vinylnaphthalene, ethyl vinyl ether, butyl vinyl ether, N-vinylphthalimide, N-vinylsuccin-2-phenimidone, n-methylonylcinnate, n-methylyl vinylcarbonetylmethylcarbonyl. or mixtures of two or more of these compounds. Typical and representative examples of preferred vinylidene resins which may be used are as follows: 80% vinylidene chloride - 20% acrylonitrile% vinylidene chloride - 50% vinyl acetate% vinylidene chloride - 70% vinyl chloride% vinylidene chloride - 95% vinyl chloride vinyl chloride 70 vinyl chloride 70 vinyl chloride 70 vinyl chloride -; vinylidene chloride - 15% vinyl acetate% acrylonitrile.

Det bar framhallas, att ett eller en blandning av flera vinylidenhartser, med eller utan andra hartser, och med eller utan mjukningsmedel kunna anvandas. It should be noted that one or a mixture of several vinylidene resins, with or without other resins, and with or without plasticizer may be used.

Den exakta naturen av vinylidenhartset beror p5. anvandningen av produkten. Nar det belagda holjet skall anvandas for forpackning av kottprodukter sasom leverkorv och farskt, malet kott, foredrages vinylidenhartser innehallande 40 % eller mera av vinylidenkloriden i molekylen. The exact nature of the vinylidene resin depends on p5. the use of the product. When the coated casing is to be used for packaging meat products such as liver sausage and freshly ground meat, vinylidene resins containing 40% or more of the vinylidene chloride in the molecule are preferred.

Belaggningen pafores direkt pa slangbasen. Den kan paloras ur vattenhaltiga eller icke vattenhaltiga blandningar sasom dispersioner, latex, emulsioner, organosoler eller plastisoler, ur organiska losningsmedel eller vattenlosningar och ur smaltor &Isom genom doppning, genom doppning atfoljd av skrapning med pa lampligt salt formade avstrykningsknivar, genom sprutning, genom strangpressning vid vanlig eller fOrhojd temperatur eller pa varje annat lampligt satt. The coating is applied directly to the hose base. It can be palorized from aqueous or non-aqueous mixtures such as dispersions, latexes, emulsions, organosols or plastisols, from organic solvents or aqueous solutions and from slurries & isom by dipping, by dipping followed by scraping with suitable salt-shaped wiping knives, by spraying, by extrusion normal or elevated temperature or in any other appropriate way.

Belaggningen ãr i normala fall genomskinlig. Nar en opaliserande eller fargad belaggning onskas infores lampliga opaliseringsmedel eller fargamnen i belaggningsblandningen. The coating is normally transparent. When an opalescent or colored coating is desired, suitable opalizing agents or dyes are introduced into the coating mixture.

Den hallfasthet, soni behaves for att motsta spanningar och benagenhet att andra dimension vid holjets stoppning med kOttprodukter, vid hanteringen och vidarebehandlingen av forpackningen, erhaller produkten genom slangens cellulosabas. Slangar framstallda av cellulosagenerat, cellulosaetrar sasom etyl-, propyl-, hydroxialkyletrar och liknande etrar, och foretradesvis sadana slanger, som aro forstarkta med fibrer sasom t. ex. de, som anvandas vid framstallning av yoshinopapper, rispapper och liknande, hampa, konstsilke, lin, nylon, polyetylentereftalat, akrylonitril och liknande aro typiska exempel pa slangar pa. cellulosabas, vilka ge tillfredsstallande resultat. The semi-rigidity, soni behaves to withstand stresses and tendencies that second dimension in the stuffing of the casing with meat products, in the handling and further processing of the packaging, the product obtains through the cellulose base of the hose. Hoses made of cellulose gene, cellulose ethers such as ethyl, propyl, hydroxyalkyl ethers and similar ethers, and preferably such hoses, which are reinforced with fibers such as e.g. those used in the manufacture of yoshino paper, rice paper and the like, hemp, silk, linen, nylon, polyethylene terephthalate, acrylonitrile and the like are typical examples of hoses. cellulose bases, which give satisfactory results.

Cellulosaslangen kan framstallas enligt varje kant satt, sasom t. ex. ur kopparammoniak, deacetylering a- cellulosaacetat, ur viskos, genom denitrering av cellulosanitrat eller strangpressning av lampliga blandningar. Cellulosaslang forstarkt med fibrer kan framstallas enligt sattet far de amerikanska patentskrifter na 2 144 899 och 2 144 900. Nar slangen framstalles under anvandning av viskos, kan den avsvaxlas enligt kanda metoder for att ne& bringa lukten hos slutprodukten. The cellulose hose can be made according to each edge set, such as e.g. from copper ammonia, deacetylation α-cellulose acetate, from viscose, by denitration of cellulose nitrate or extrusion of suitable mixtures. Cellulose fiber reinforced with fibers can be made according to the method of U.S. Pat. Nos. 2,144,899 and 2,144,900.

Basslangen kan vara genomskinlig, °pallserande, fargad eller tryckt med informations-material eller dekorativa effekter, innan den belagges. Foretradesvis mjukas basslangen med sadana material som glycerin eller glykoler. The base hose can be transparent, palleting, colored or printed with information material or decorative effects, before it is coated. Preferably, the base hose is softened with such materials as glycerin or glycols.

Belaggningen pafores pa slangen, som kan befinna sig i torn, eller anyo uppblott till-stand eller aldrig torkat geletillstand. Efter belaggning avlagsnas 18sningsmedlet i belaggningsblandningen, dvs. losningsmedel eller vatten, fran filmen for att giva ett i huvudsak klibbfritt tillstand genom torkning -vid en lamplig temperatur pa vatic lampligt satt s5.som t. ex. medelst dielektrisk upphettning, konvektionsuppvarmning eller foretradesvis medelst van m luft atfoljd av infrarod uppvarmning. Far att sakerstalla den onskade formen pa slangen uppblases den belagda slangen till onska.d storlek med ett gasformigt medium sasom luft och den uppblasta slang-en underkastas torkningsoperation. The coating is applied to the hose, which may be in the tower, or anyo in an exposed state or never dried gel state. After coating, the solvent is deposited in the coating mixture, i.e. solvent or water, from the film to give a substantially tack-free state by drying -at a suitable temperature of the vatic set such as e.g. by dielectric heating, convection heating or preferably by ordinary air followed by infrared heating. In order to ensure the desired shape of the hose, the coated hose is inflated to the desired size with a gaseous medium such as air and the inflated hose is subjected to drying operation.

Nar belaggningen pafores fran en. vattenhaltig blandning, torkas i allmanhet slangen till en fukthalt av mindre an 15 % foretradesvis till 5-10 viktprocent. Nan belaggningsblandningen innehaller ett flyktigt losningsmedel, torkas den belagda slangen under betingelser, som i huvudsak avlagsna losningsmedlet. Om t. ex. metylisobutylketon utgar vatskemedlet, underkastas det belagda holjet en uppvarmning till 90 a 110°C, tills belaggningen ar fri frau klibbighet. When the coating is applied from one. aqueous mixture, the hose is generally dried to a moisture content of less than 15%, preferably to 5-10% by weight. When the coating mixture contains a volatile solvent, the coated hose is dried under conditions which substantially remove the solvent. If e.g. methyl isobutyl ketone releases the liquid, the coated casing is subjected to heating to 90 to 110 ° C, until the coating is free of tack.

For att ett belagt holje for kottindustrien skall ha tillfredsstallande egenskaper maste belaggningen hafta fast vid grundmaterialet, sâ att det motstar notning och icke nämnviirt losgores, flagar av eller spricker yid doppning i hett vatten och bajning i kyla. Utforliga stoppningsforsok och behandlingar ha visat, att tillfredsstallande forpackningsegenskaper kunna erhallas, om belaggningens vidhaftning ãr tillrackligt god for att motsta foljande prov: Ett prov av hadj et kokas i vat-ten vid 100°C under 5 minuter. Ett antal remsor av scotch tape med en bredd av ca 1,2 cm fastas sedan pa den belagda ytan. Darefter avlagsnas varje tapestycke med en avrivningsstyrka av 500 g. Vidhaftningen anses tillfredsstallande, om icke mer an 3 % av den av tapen ursprungligen belagda ytan avlagsnas vid avrivningen. In order for a coated casing for the meat industry to have satisfactory properties, the coating must adhere to the base material so that it resists wear and does not become loose, flakes off or cracks by dipping in hot water and bending in the cold. Extensive padding tests and treatments have shown that satisfactory packaging properties can be obtained if the adhesion of the coating is good enough to withstand the following test: A sample of hadj is boiled in water at 100 ° C for 5 minutes. A number of strips of scotch tape with a width of about 1.2 cm are then attached to the coated surface. Thereafter, each piece of tape is removed with a tear strength of 500 g. The adhesion is considered satisfactory, if not more than 3% of the surface originally coated by the tape is removed during tear.

Ett halje, vid vilket belaggningen torkas till klibbfrihet pa. i det tidigare beskrivet satt uppfyller icke fordringarna for ovanstaende vidhaftningsforsok. Efter omfattande Mrs& har det visat sig, att tillfredsstallande vidhaftning av belaggningen direkt p5. grundmaterialet liksom liven jamnheten hos belaggningen uppnas genom att underkasta den torkade, — —3 belagda slangen en varmebehandling under en viss lid och vid en tillracklig temperatur i uppblast tillstand for att sintra belaggningen, varvid betingelserna maste vara sadana att de icke skadligt paverka belaggningen eller sj äl-vu slangen. Varme for denna behandling kan erhallas frail infrarod kalla, beroring med laga, varmeutvaxling mellan Anga och luft eller radio frekvent dielektrisk behandling. En blandning av luft och varma fOrbranningsprodukter frail en gaslaga f8redrages pa grund av enkelheten och de ekonomiska fOrdelarna. A coat, at which the coating is dried to non-stick. in the manner previously described does not meet the requirements for the above adhesion test. After extensive Mrs & it has been found that satisfactory adhesion of the coating directly p5. the basic material as well as the uniformity of the coating is achieved by subjecting the dried hose to a coated heat treatment for a certain time and at a sufficient temperature in an inflated state to sinter the coating, the conditions having to be such that they do not adversely affect the coating or äl-vu snakes. Heat for this treatment can be obtained frail infrared cold, contact with law, heat exchange between Anga and air or radio frequent dielectric treatment. A mixture of air and hot combustion products from a gas layer is preferred due to its simplicity and economic advantages.

Tjockleken av belaggningen i produkten kan variera beroende pa den slutliga anvandningen av det belagda h8lj et. I allmanhet aro belagda holjen av det slag som har beskrivits, och vid vilka belaggningen bar en tjocklek av mindre an 0,0013 mm icke tillfredsstallande. Nar emellertid belaggningens tjocklek ãr stOrre an 0,0013 mm, t. ex. frail ca 0,0025 till ca 0,05 mm lampa sig holjena utmarkt for inlaggning, bearbetning och lagring av leverkorv och inlaggning och lagring av farsk kottkorv. The thickness of the coating in the product may vary depending on the end use of the coated casing. In general, coated casings of the type described, in which the coating had a thickness of less than 0.0013 mm, are unsatisfactory. However, when the thickness of the coating is greater than 0.0013 mm, e.g. frail approx. 0.0025 to approx. 0.05 mm, the holes are excellent for pickling, processing and storage of liver sausage and pickling and storage of fresh meat sausage.

Uppfinningens praktiska utforande beskrives narmare i nedanstaende exempel, dar de angivna mangderna avse viktdelar. The practical embodiment of the invention is described in more detail in the examples below, where the stated amounts refer to parts by weight.

Exempel 1. En avsvavlad och med glycerin mjukad slang av cellulosaregenerat, forstarkt med hampfiber, leddes genom en latexlosning innehallande 10-20 % fasta amnen, vilka i huvudsak utgjordes av 85 % av en sampolymer av 80 % vinylidenklorid och 20 % akrylonitril samt 15 % dibutylftalat (denna latex är en handelsvara med beteckningen saran F 112-A-15 utspadd med vatten for att giva 10-20 viktprocent fasta amnen). Den belagda slangen uppblastes med luft till Onskad diameter och torkades i detta tillstand vid en temperatur av 80-120°C till en fukthalt av %. Vid delta steg var belaggningen i den erhallna torkade produkten fri frau klibbighet men uppfyllde icke villkoren for vidhaftningsfOrsoket, som beskrivits i det foregaende. For att Oka belaggningens vidhaftning direkt till grundslangen underkastades den torkade, belagda slangen medan den fortfarande befann sig i uppblast tillstand, en temperatur av 150-190°C under 1 till 5 min., vid vilken temperatur belaggningen sintrade, dvs. flOt ut och sammansmalte for att giva en koninuerlig belaggning. Darefter kyldes den belagda slangen och utplattades slutligen, i vilket tillstand den skars till Onskade langder for att anvandas sasom holje mom kottindustrien. Example 1. A desulfurized and glycerin-softened cellulose-regenerated hose, pre-reinforced with hemp fiber, was passed through a latex solution containing 10-20% solids, which consisted essentially of 85% of a copolymer of 80% vinylidene chloride and 20% acrylonitrile and 15% dibutyl phthalate (this latex is a commodity designated saran F 112-A-15 diluted with water to give 10-20% by weight of solids). The coated hose was inflated with air to the desired diameter and dried in this state at a temperature of 80-120 ° C to a moisture content of%. In this step, the coating in the resulting dried product was free of tack but did not meet the conditions of the adhesion test described above. In order to increase the adhesion of the coating directly to the base hose, the dried, coated hose while still in the inflated state was subjected to a temperature of 150-190 ° C for 1 to 5 minutes, at which temperature the coating sintered, i.e. floated out and fused together to give a continuous coating. The coated hose was then cooled and finally flattened, in which condition it was cut to desired lengths to be used as a casing in the meat industry.

Den sintrade belaggningen var ca 0,0025 ram tjock och haftade kraftigt direkt till slangen. Sedan den behandlats med vatten vid 100°C under 5 min avlagsnades avsevart mindre an 3 % av den belagda ytan, nar den undersoktes i overensstammelse med det tidigare beskrivna vidhaftningsforsoket. Den fungerar tillfredsstallande under stoppning med leverkorvemulsion och aven under behandlingen och lagringen. Under stoppningsbetingelserna, vid vilka det belagda holjet stracktes ung. 10 % i omkretsen, strackas motsvarande saranholjen 25 till % med. Atfoljande minskad jamnhet i diametern. Leverkorvar forpackade i haljen enligt foreliggande uppfinning kunna betydligt lattare skitras i skivor an leverkorvar forpackade i saranholjen. Vid lagring under 3 veckor vid 4°C och 55 % relativ fuktighet sprack eller flagade belaggningen icke av och den inlagda leverkorven uppvisade en viktforlust av ca 12 % och ingen antydan av bildning av en bran ring. Leverkorvar inlagda i holjen framstallda av obelagd slang och lagrade under samma betingelser och samma tid visade en viktforlust av 12-17 % och bildning av en ful, brun ring. The sintered coating was about 0.0025 frame thick and adhered strongly directly to the hose. After being treated with water at 100 ° C for 5 minutes, significantly less than 3% of the coated surface was deposited when examined in accordance with the previously described adhesion test. It works satisfactorily during stuffing with liver sausage emulsion and also during treatment and storage. Under the padding conditions, at which the coated casing was stretched young. 10% in circumference, the corresponding saran oil is stretched to 25%. Consequently reduced uniformity in diameter. Liver sausages packed in the shell according to the present invention can be shredded into slices much more easily than liver sausages packed in the saran oil. During storage for 3 weeks at 4 ° C and 55% relative humidity, the coating did not crack or flake off and the pickled liver sausage showed a weight loss of about 12% and no indication of the formation of a burn. Liver sausages placed in the casing made of uncoated hose and stored under the same conditions and at the same time showed a weight loss of 12-17% and the formation of an ugly, brown ring.

Exempel 2. Samma som exempel 1 med undantag av att avsvavlad med glycerin mjukad regenererad slang anvandes i stallet f Or starkt slang. Example 2. Same as Example 1 except that desulfurized glycerin softened regenerated tubing was used in the stable or strong tubing.

Exempel 3. Samma som i exempel 1 och 2 med undantag av att i stallet I Or att anvanda latex anvandes en 10-20 % losning av sampolymeren i metylisobutylketon och att den uppblasta, belagda slangen torkades till i huvudsak klibbfrihet vid 90-1°C fore sintringen. Example 3 before sintering.

Exempel 4. Samma som i exempel 1 med undantag av att i stallet for latex anvandes en 10-20 % losning av sampolymeren i metyletylketon och att den uppblasta, belagda slangen torkades vid 80°C till i huvudsak klibbfrihet fare sintringen. Example 4

PA grund av den ringa genomslappligheten av syre lampa sig holjena enligt uppfinningen utmarkt for inlaggning av farskt, malet kott. Farskt, malet kat inlagt i dessa holj en bibeboll sin tilltalande, rOda farg efter lagring under tre dagar. Ehuru holjena aro synnerligen lampliga for inlaggning av leverkorv och farskt, malet Witt, kunna de aven. ,anvandas overallt, dar lag genomslapplighet for gas och vattenanga fordras. Due to the low permeability of oxygen, the casings according to the invention are excellent for inserting fresh, ground meat. Fresh, ground cat pickled in these hollow a bibball its appealing, red color after storage for three days. Although the hulls are particularly suitable for pickling liver sausage and fresh, ground Witt, they can also. , is used everywhere where law permeability to gas and water vapor is required.

Den belagda slangen torkas till klibbfrihet och sintras medan den befinner sig i uppblast tillstand. Om sa. onskas, kan slangen utplattas mellan dessa tvA steg eller kan den uppblasta slangen successivt underkastas de tva. uppvarmningsbehandlingarna. The coated hose is dried to non-stick and sintered while in an inflated state. Om sa. if desired, the hose can be flattened between these two steps or the inflated hose can be successively subjected to the two. the heating treatments.

Manga andringar och modifikationer kunna genomforas utan att franga principen for ovanstaende beskrivning och uppfinningen är icke begransad till denna utan angives i sin helhet i de bifogade patentanspraken. Many changes and modifications may be made without departing from the principle of the foregoing description and the invention is not limited thereto but is set forth in its entirety in the appended patent claims.

Claims

Patent claims:

Set to produce vinylidene-coated cellulose foil, wherein an empty vinylidene plastic is coated with an empty recellulose hose and the coating is dried, characterized in that the vinylidene coating contains at least 5% by weight of vinylidene chloride and has a thickness of 0,00254-0. the coated hose in the inflated state is first dried at 90-120 ° C, until the coating is substantially tack-free, and then further treated at 150-190 ° C for 1-5 minutes, so that the coating is bonded to the cellulose hose, after which part is completely cooled, the hose is flattened ° eh ,. em s onskas, cut for use in suitable lengths.

2. San according to claim 1, characterized in that the cellulose hose is pre-reinforced with fibers.

Salt according to claim 1 or 2, characterized in that the film-forming resin contains at least 40% by weight of vinylidene chloride.

4. Set according to any one of the patent claims 1.3, characterized in that the hose is dried to a moisture content of less than 15% by weight.

5. Set according to some of the preceding patent claims, characterized in that the hose is dried to a moisture content of between 5 and 10% by weight. Request Publications: Patent Patent Iran Iran 692 154, 714 275; USA. 2 686 72

6.