EP0037494B1 - Verfahren zur Herstellung einer schlauchförmigen Verpackungshülle mit einem Überzug auf der Innenseite und Vorrichtung zur Durchführung des Verfahrens - Google Patents

Verfahren zur Herstellung einer schlauchförmigen Verpackungshülle mit einem Überzug auf der Innenseite und Vorrichtung zur Durchführung des Verfahrens Download PDF

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Publication number
EP0037494B1
EP0037494B1 EP81102079A EP81102079A EP0037494B1 EP 0037494 B1 EP0037494 B1 EP 0037494B1 EP 81102079 A EP81102079 A EP 81102079A EP 81102079 A EP81102079 A EP 81102079A EP 0037494 B1 EP0037494 B1 EP 0037494B1
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EP
European Patent Office
Prior art keywords
tubing
coating liquid
gap
coating
hose
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
EP81102079A
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German (de)
English (en)
French (fr)
Other versions
EP0037494A1 (de
Inventor
Reinhold Dr. Dipl.-Ing. Becker
Heinz Dr. Kälberer
Richard Dipl.-Ing. Regner
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Hoechst AG
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Hoechst AG
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Application filed by Hoechst AG filed Critical Hoechst AG
Priority to AT81102079T priority Critical patent/ATE7667T1/de
Publication of EP0037494A1 publication Critical patent/EP0037494A1/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C7/00—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work
    • B05C7/04—Apparatus specially designed for applying liquid or other fluent material to the inside of hollow work the liquid or other fluent material flowing or being moved through the work; the work being filled with liquid or other fluent material and emptied
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
    • B05D7/222—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of pipes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D2201/00—Polymeric substrate or laminate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
    • B05D7/02—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to macromolecular substances, e.g. rubber
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S118/00—Coating apparatus
    • Y10S118/10—Pipe and tube inside

Definitions

  • the invention relates to a method for producing a tubular packaging sleeve with a coating on the inside of the type mentioned in the preamble of claim 1 and a device of the type mentioned in the preamble of claim 7 for performing the method.
  • This prior art is known from DE-B No. 1492708.
  • the packaging casings produced by the method according to the invention serve in particular as artificial sausage skin for cooked and cooked sausages.
  • GB-A No. 1201830 describes a process for the interior coating of tubular packaging sleeves made of cellulose hydrate with an aqueous plastic dispersion, in which the cellulose hydrate tube is continuously passed horizontally through the nip of a vertical pair of nip rollers and then redirected to the vertical by means of a deflection roller. In the cavity of the hose part emerging from the nip of the pair of squeeze rollers, there is a certain amount of aqueous plastic dispersion as coating liquid. The vertically extending hose is subjected to heat above the level of the coating liquid in an upward-pointing drying tunnel.
  • a method for the inner coating of hoses in which a hose made of plastic or dense fabric is continuously guided through the nip of a vertical pair of nip rollers, the hose lying flat obliquely in the direction from bottom to top of the roller pair is fed; the tube lies flat before the entry into the nip of the nip roller pair, initially lying flat against the circumference of the lower roller of the roller pair and, after exiting from the metering nip of the upper roller, partially flat. After lifting the flat-lying hose from the surface of the upper roller of the pair of rollers, it runs at an incline from bottom to top.
  • the coating liquid is - viewed in the hose travel direction - in the hose part in front of the pair of squeeze rollers.
  • the hose to be coated is first laid horizontally, then with partial encirclement of the circumference of a roller of a horizontal pair of nip rollers, and then vertically thereafter led in the direction from bottom to top. A certain amount of reaction liquid is trapped in the tube cavity above the pinch nip of the pair of rollers.
  • the coated tube passes through a first pair of squeeze rollers, then remains in the flat state until a second pair of squeeze rollers is reached, and is then dried in the inflated state, passing through a drying device in the horizontal direction.
  • a horizontal pair of rollers is to be understood as one in which the parallel axes of its rollers extend in a common vertical plane.
  • the present invention is based on the object of proposing a method for forming a uniformly thick, uninterrupted coating on the inside of a hose made of cellulose hydrate using aqueous liquid capable of forming a coating and containing chemical substance as coating liquid, which can be carried out in an energetically advantageous manner, the exact Dosing of the coating liquid enables, and in which the inner coating is practically run-free; in particular, it is based on the object of a method for forming a uniformly thick, uninterrupted film cover made of synthetic polymer to propose the inside of a hose made of cellulose hydrate as a coating liquid using aqueous plastic dispersion, which can be carried out in an energetically advantageous manner, with which precise dosing of the coating liquid is possible, and in which the inside coating takes place practically without any runoff.
  • the process is advantageously carried out under conditions which prevent the pressure of the supporting air in the cavity of the hose from being able to press the coating liquid supply in the hose loop in front of the metering device in the direction counter to the movement of the hose and onto the supply roll.
  • the hose When carrying out the method, the hose is moved axially and continuously at a constant speed; the movement of the hose mentioned is briefly described below with the expression moved.
  • the hose can be moved, for example, by continuously guiding it after drying and cooling and before winding it up through the nip of a pair of nip rollers with rotatable rollers that are drivable and are driven, for example, by means of motors.
  • the method is carried out in such a way that the hose is advantageously moved at a speed in the range from 8 to 60 m / min.
  • a speed of movement of the hose in the range between 20 and 40 m / min is particularly advantageous.
  • an aqueous plastic dispersion which has a high proportion of dispersed plastic in relation to the amount of dispersant.
  • An aqueous plastic dispersion with a high proportion of dispersed plastic, based on the total weight of the aqueous dispersion, is one which contains at least 15% by weight of dispersed plastic; aqueous plastic dispersions, which have a proportion in the range from 15 to 60% by weight, preferably 20 to 60% by weight, particularly preferably 30 to 40% by weight, of dispersed plastic, in each case based on the total weight of the dispersion, are particularly advantageous, contain.
  • Aqueous plastic dispersions suitable for carrying out the process are, in particular, those whose dispersed plastic is capable of forming films after the dispersant has been expelled and the dispersed material has melted by means of sufficient heat, in particular those which are practically impermeable to water and water vapor.
  • Those aqueous plastic dispersions of the named concentration which contain, as a dispersed plastic component, copolymers which are described in DE-B No. 2512995 and in DE-C No. 2512994 are very particularly suitable.
  • the plastics or plastic dispersion mentioned are not the subject of the present invention.
  • the preferably fiber-reinforced cellulose hydrate tube used to implement the invention advantageously has a swelling value (water retention capacity) in the range from 120 to 140% (DIN 53 814).
  • the cellulose hydrate leek example has a wall thickness in the range of about 30 to 300 wm, preferably such a m is in the range of 80 to 120 Il.
  • a fiber-reinforced cellulose hydrate tube should be understood to mean one that contains a fiber web embedded in its wall.
  • the fiber insert in the hose wall does not prevent water from diffusing through the hose wall.
  • the wall of the preferably fiber-reinforced cellulose hydrate tube advantageously contains a water fraction in the range from 8 to 12% by weight, based on the total weight of the tube, and a fraction in the range from 18 to 24% by weight, advantageously one of 22% by weight.
  • chemical agent capable of softening cellulose hydrate for example glycerin, glycol or polyglycol.
  • the percentages by weight relate to the total weight of the fiber-reinforced cellulose hydrate tube.
  • cellulose hydrate tube is by definition both a tube of cellulose hydrate which is not yet subjected to a drying process and which contains the abovementioned proportion of chemical agent capable of softening cellulose hydrate in the stated amount, and also one Cellulose hydrate tube which has already been subjected to a drying process and which contains the abovementioned proportion of water and plasticizer of the type mentioned and has on its surface an adhesion-promoting layer of chemical agent which is permeable to water and water vapor, for example a layer of a water-insoluble reaction formed by heat curing Product of epichlorohydrin with a polyamine / polyamide, for example a layer of a thickness corresponding to a weight per unit area in the range from 30 to 100 mg / m 2 substrate surface; the designated adhesion-promoting layer leads to a process product when the process is carried out, in which the plastic film covering is firmly connected to the substrate surface.
  • the designated tube made of cellulose hydrate in the gel state as well as the designated cellulose hydrate tube with an adhesion-promoting layer of chemical substance on its surface is referred to in the context of the description of the invention and the claims as the starting tube. These hoses each represent the process starting product.
  • the output hoses are preferably each fiber-reinforced.
  • the starting tube, process starting product is, for example, an advantageously fiber-reinforced tube made of cellulose hydrate, which has a swelling value of 120 to 140%, for example about 130%, a water content of 8 to 12% by weight, for example one of 10% by weight. %, and a proportion of glycerin as a plasticizer from 18 to 24 wt .-%, for example one of 22 wt .-%, and on the inside a water and water vapor permeable, thin adhesion-promoting layer of chemical substance, for example a layer of a Thickness corresponding to 30 to 100 mg / m 2 of a water-insoluble reaction product of epichlorohydrin and a polyamine / polyamide has.
  • the process is carried out in such a way that the plastic film coating on the inside of the process end product (process product) has a thickness corresponding to a weight per unit area in the range of advantageously 8 to 20 g of plastic per m 2 of substrate surface, preferably 10 to 15 g of plastic per m 2 of substrate surface .
  • the film coating is physically homogeneous, it is uniformly thick and uninterrupted.
  • the implementation of the method according to the invention is to be described by way of example, with a particularly suitable device being used and described for the implementation thereof.
  • the output hose corresponds, for example, to a caliber 90 with a flat width of 143 mm.
  • a long piece of said hose for example one with a length of 350 m, is wound flat on a rotatably designed, stationary bearing drum.
  • the hose is continuously unwound from the supply roll and in the longitudinal axial direction to form a hose loop and first in the direction from top to bottom and then after deflection, for example by a rotatable deflection roller, from bottom to top at a constant speed, for example 20 to 40 m / min, moving.
  • aqueous dispersion of a thermoplastic for example 10 l of a 30% by weight dispersion, for example, 88% by weight of its dispersed plastic content from copolymerized vinylidene chloride, 3% by weight.
  • a dispersion of the concentration mentioned can be prepared by, for example, starting from one which contains, for example, 55% by weight of the dispersed copolymer content, and bringing it to the concentration suitable for carrying out the process by dilution with water.
  • the amount of aqueous plastic dispersion required to coat the inside of the total length of the cellulose hydrate tube used with a plastic film coating and which is filled into the cavity of the tube at the start of the process is dimensioned such that the cavity of the vertical tube loop part is partially filled with coating liquid; sufficiently far above the level of the portion of the coating liquid supply located in the vertical hose loop part, the hose is continuously fed through and wrinkle-free through the metering gap of a metering device with a horizontal metering gap under conditions preventing the formation of folds.
  • hose with supporting air in the hose cavity refers to the hose which emerges from the horizontal metering gap of the metering device and runs vertically in the direction from bottom to top with a liquid, thin layer of aqueous plastic dispersion on the inside.
  • the formulation hose with supporting air in its cavity and a liquid thin layer of aqueous plastic dispersion with a concentration on its inside should by definition include hose parts that are circular or practically circular in cross-section.
  • the shape of the hose with supporting air in the cavity is ensured by sufficient supporting air pressure to maintain its cross-sectional shape; in the case of hoses with a circular cross section filled with supporting air, the supporting air can also exert pressure on the inner wall of the hose, which can cause radial expansion of the hose to a small extent.
  • the hose In order to prevent the supporting air in the hose cavity from pressing, for example, the amount of coating liquid in the hose loop against the direction of hose travel and against the supply roll, it is advantageous to move the hose in the direction of travel, especially before it is deflected vertically by the guide roll , the one filled with storage liquid Compressing the hose continuously flat, for example by continuously passing it through the nip of a pair of nip rollers with rotatable rollers, in the gap of which the liquid-filled hose is compressed.
  • the continuous compression of the hose which runs obliquely in the direction from top to bottom, can advantageously also take place in such a way that with the.
  • Water is continuously supplied with coating liquid according to its consumption by coating the inside of the hose to maintain the level of the same in the vertical hose part.
  • This combined effect can advantageously be achieved, for example, by leading the hose through the press nip of a cooperating pair of profiled conveyor belts on its outer sides (DE-C No. 2659000) or by using a device as described in DE-C No. 2557994 is described.
  • a liquid, thin layer of aqueous plastic dispersion on the inside of the hose of the hose filled with supporting air is to be understood as having a smaller thickness than that which is on the inside of the vertically guided hose before entering the metering gap of the metering device and which after the dispersion medium has been expelled from the liquid layer and the dispersed material has melted by the action of heat at a temperature sufficient for this purpose, an uninterrupted, uniformly thick film coating corresponding to a basis weight of advantageously 8 to 20 g of plastic per m 2 of substrate surface results.
  • the coordination of the process parameters mentioned to one another can be determined in a simple manner for the respective case by a few and simple preliminary tests.
  • the continuous passage of the hose through the metering gap of the metering device leads, depending on the speed of movement of the hose and the concentration of the aqueous plastic dispersion used, to the accumulation of aqueous dispersion in the hose cavity immediately before the metering gap.
  • the hose with a thin layer of aqueous plastic dispersion filled with supporting air and leaving the metering gap of the device is guided vertically in a direction from the bottom upwards and subjected to the action of heat, the temperature of which is sufficient, through which the dispersant of the liquid, thin layer on the inside of the hose is diffused to expel the tube wall to the outside and to fuse the dispersed material to form an uninterrupted plastic film coating on the inside of the tube.
  • the application of heat to the hose to dry the liquid layer of aqueous dispersion on the inside of the hose filled with supporting air takes place, for example, by leading it vertically in the direction from bottom to top through a straight drying tunnel, for example one that is equipped with infrared heating elements.
  • a straight drying tunnel for example one that is equipped with infrared heating elements.
  • the hose is heated, for example, to a temperature of approximately 80 ° C. and at the end of the hose to a temperature of, for example, approximately 140 ° C.
  • the hose Before the heat is applied, the hose is advantageously passed through an air gap, for example a length in the range from 50 to 100 cm.
  • the ambient air in the area of the air gap is at room temperature.
  • the hose After exposure to heat and subsequent cooling of the film coating formed, to the extent that it is no longer adhesive - for example with cold air - the hose is optionally moistened with water, for example with spray nozzles.
  • the hose is advantageously brought to a water content in the range from 8 to 12% by weight, for example to 10% by weight, in each case based on the total weight of the hose.
  • the amount of supporting air required in each case in the cavity of the tube piece emerging from the metering gap of the metering device is introduced into this cavity at the beginning of the process; the inner tube pressure is maintained at the beginning of the process by the tube, which has been cooled and, if necessary, moistened after exiting the drying tunnel, being pressed together flat along its narrow width along a narrow zone, for example by passing it through the nip of a pair of rollers.
  • the peripheral speed of the rollers of the pair of squeeze rollers is advantageously in the range between 8 and 60 m / min, for example they have a peripheral speed of 30 m / min.
  • the speed of movement of the hose is determined by the circumferential speed of the rollers.
  • the process product is then wound onto a rotatable and driven roll which is designed and driven.
  • dosing device with a horizontal dosing gap includes a pair of endless belts with a vertical longitudinal axis of symmetry, a pair of planar, planar, spaced-apart converging guide or form elements, the shape of which corresponds to a doctor blade or wiper in the actual dosing gap, or a horizontal pair of rollers rotatable rollers.
  • the metering device with a horizontal metering gap consists of a pair of endless belts which jointly delimit a horizontal metering gap, in which adjacent outer sides of straight belt regions of the endless belts jointly egg limit a gap, the width of which is determined by the respective distance between the mutually facing outer sides of the strips and changes continuously from one end of the gap to the other.
  • the narrowest area of the gap, delimited by the belts, is referred to as the metering gap of the endless belt pair.
  • the widest area of the gap is referred to as the gap entrance and the narrowest area as the gap exit (metering gap).
  • the conveyor belt-like endless belts which together form the endless belt pair, are arranged symmetrically to one another and symmetrically to a common vertical straight endless belt pair symmetry axis in such a way that their straight, adjacent parts facing each other run continuously converging to one another or respectively continuously converging to the axis of symmetry, as a result of which the distance between the mutually facing, Adjacent outer sides of the strip are continuously changed such that it is larger than the diameter of the respective hose in the area of the entrance of the gap space delimited by them and corresponds to the respectively required width of the metering gap of the device in the area of the gap space exit.
  • the gap entrance is at the bottom and the gap exit is at the top of the device consisting of the pair of bands, which is arranged in the room so that its longitudinal axis of symmetry is vertical.
  • the metering gap of the device is set to a certain width.
  • the gap at its entrance is wider than the diameter of the hose.
  • the predetermined width of the fixed metering gap is selected so that the hose passing through it is partially laid in such a way that the hose wall encloses a narrow cavity of such a design that the hose emerging from the metering gap has a liquid thin layer on its inside has an aqueous plastic dispersion which has a thickness such that, after the dispersant has been expelled and the dispersed material has melted, a plastic film coating is formed on the inside of the tube by the action of sufficient heat, the thickness of which corresponds to a weight per unit area in the range of advantageously 8 to 20 g plastic per m 2 substrate surface .
  • the hose vertically moving in the direction from bottom to top enters the gap of the endless belt pair at the entrance to the gap above the level of the portion of the coating liquid located in the vertical hose part Gap space in the direction from bottom to top vertically in such a way that the longitudinal axis of the tube practically corresponds to the longitudinal axis of symmetry of the pair of endless belts, and is continuously flattened and wrinkle-free into the dosing gap as it passes through the gap to the metering gap due to the continuous contact of its surfaces with the outside of the endless belt - and passed through it.
  • the supply of the hose to the metering gap of the metering device according to the invention under conditions preventing the hose from wrinkling due to the fact that the hose is increasingly laid flat before it enters the metering gap is particularly advantageous when using large-diameter hoses, for example a 120 mm caliber.
  • the continuous belts of the endless belt pair are preferably of the same length and each consist of a self-contained belt, the width of which corresponds at least to the width of the flat hose.
  • Each endless belt of the pair of belts integrally has two straight / preferably parallel parts, the inner sides of which point towards one another, and each have two opposing, semicircular curved belt regions.
  • the side surfaces of the endless belts are aligned in pairs.
  • the outside of the endless belts are smooth, i.e. trained unprofiled.
  • the endless belts are flexible and are made of a material that gives them sufficient dimensional stability, such as plastic, rubber or thin metal.
  • the endless belts each comprise a pair, preferably of equal dimensions, of the guide rollers working together with the endless belt.
  • the dimensionally stable guide rollers advantageously consist of metal or plastic, for example of polyamide.
  • the inside of the curved parts of the endless belts are partially and non-positively on the circumference of the guide rollers in the contact area.
  • the guide rollers of each pair of belts are each fixed centrally on axle shafts, which are each rotatably mounted.
  • One of the axle shafts of each pair of belts is drivable, for example in that the end thereof is connected to a motor.
  • the axes of the guide rollers of each endless belt of the pair of belts each run horizontally and parallel to one another; the endless belts of the endless belt pair are arranged in such a way that the upper guide roller of the guide roller pair of the one endless belt forms a pair of rollers with the upper guide roller of the guide roller pair of the other endless belt, with a common, horizontal plane being formed by the axes of the guide rollers forming the roller pair can be laid.
  • the designation upper guide roller of a pair of guide rollers of an endless belt refers to the upper end of the vertical axis of symmetry of the endless belt pair.
  • the endless belts preferably have on their inner sides and the guide rollers on their circumferential surfaces each have the same surface structure, which is designed such that the positive contact between the two is strengthened.
  • the endless belts of the pair of belts are each driven at the same peripheral speed and in the opposite circumferential direction.
  • the metering device with a horizontal metering gap comprises a pair of guide or shaped elements which is similar in shape to a doctor blade or wiper in the metering gap.
  • the elements forming the pair are flat and planar; the surfaces of the elements are smooth, i.e. unprofiled; the elements are dimensionally stable and consist, for example, of plastic or metal.
  • the guide or form elements forming the pair preferably have a rectangular shape and are preferably of the same dimension.
  • the elements of the formation forming the pair are of the same shape and dimension.
  • the pair of elements has a vertical axis of symmetry.
  • the plate-shaped elements forming the pair of guide elements or shaped elements are arranged such that they are fixed to one another in space in such a way that they converge and the mutually facing surfaces of the elements jointly delimit a gap space, the width of which constantly changes from one end to the other; in the area of its smallest width, the gap is referred to as the metering gap of the pair of elements.
  • the widest area of the gap is defined as the gap entrance and the narrowest area as the gap exit.
  • the pair of guide or shaped elements is arranged in space such that the narrowest area of its gap (metering gap) is in the upper part and the widest is at the lower end of the device; the designations below and above each relate to the vertical axis of symmetry of the device.
  • the pair of guide or shaped elements consists of a pair of doctor blades forming the metering gap.
  • the width of the gap of the pair of elements at its entrance is wider than the diameter of the hose.
  • the horizontal metering gap of the pair of elements has a fixed width such that the hose is partially flattened when it is passed through the metering gap in such a way that the hose wall encloses a narrow cavity which is dimensioned such that the hose exiting from the metering gap is one on the inside has an aqueous thin layer of such a thickness that after the dispersant has been expelled from it through the tube wall to the outside and the dispersed material has melted due to the action of heat at a sufficient temperature on the inside of the tube, a plastic film covering is formed, the thickness of which has a basis weight in the range from 8 to 20 g / m 2 substrate surface corresponds.
  • the diameter of the rollers is chosen to be correspondingly large in order to prevent wrinkling of the tube during the transition from the inflated to the flattened state when entering the metering gap.
  • devices are attached in front of the pair of rollers, which are common when laying extruded plastic hoses without folds, e.g. Baffles, tapered roller conveyors, conveyor belts or guide rollers, which gradually convert the inflated tube into the flat state.
  • the process variants to fill the coating liquid with a certain supply quantity
  • the hose longitudinal axis of the loop thus runs in a single horizontal plane and extends a short distance below the horizontal plane of the metering gap of the device.
  • the horizontal, flat support surface for the hose loop is referred to as the support plate.
  • the support plate for the horizontal hose loop can be, for example, a plate attached to a frame.
  • At least one rotatable deflection roller is provided on the upper side thereof, the axis of which forms a right angle with the plate plane.
  • the deflection roller axis is attached at one end to the support plate.
  • the hose filled with coating liquid is guided in such a way that the outside thereof partially adjoins the circumference of the deflection roller and is deflected by the latter to form a loop.
  • roller pairs or conveyor belts (DE-C Nos. 2659000 and 2557994) are used to feed the coating liquid, which also show the advantage that no coating liquid can flow in the opposite direction to the hose travel.
  • the dried hose is then cooled, for example by continuously supplying it with cold air, for example by means of a cooling air shower.
  • the devices suitable for carrying out the method according to the invention include in each case also the necessary devices for the positionally fixed mounting of the individual device elements.
  • the cellulose hydrate tube only absorbs such an amount of water from the time period in which it is in contact with an aqueous plastic dispersion of the stated concentration, or that only such an amount of water passes through from the liquid layer the cellulose hydrate tube diffuses outwards so that the respective water content in the cellulose hydrate tube is significantly lower (preferably 20 to 30% of the water retention capacity) than that which corresponds to the swelling value (water retention capacity) of the cellulose hydrate tube.
  • the water content of the hose when carrying out the process is in particular only about a quarter of the amount of water which corresponds to the swelling value of the starting hose. (Determination of the swelling value according to DIN 53 814; “ Dyeing and textile chemical investigations", A. Agster, p. 450, Springer Verjag 1967, 10th. Days.)
  • a film coating for example with a thickness corresponding to a basis weight of 10 g of plastic per square meter of substrate surface, 143.8 g of water must be used according to the known method when using an aqueous plastic dispersion of the usual concentration, for example 6.5% by weight of dispersed plastic are expelled per square meter of substrate surface by the action of heat on the hose to form the designated film coating.
  • the method according to the invention in its variants accordingly requires only one sixth of the thermal energy required to produce a film coating of the same thickness in order to produce a plastic film covering a thickness corresponding to 10 g plastic per square meter of substrate surface.
  • the method according to the invention also allows a considerable increase in the coating speed because of the small amount of water to be expelled from the liquid layer of aqueous plastic dispersion to form a plastic film on the inside of the hose.
  • the process according to the invention avoids coating defects because of the aqueous plastic dispersion with a high proportion of dispersed plastic used for the following reasons:
  • a cellulose hydrate tube with a swelling value of, for example, 120% as the process starting product must, according to the known processes for internal coating, have a weight of, for example, 6.5 .-% aqueous plastic dispersion and to form a film coating corresponding to a thickness of, for example, 10 g of plastic per square meter of substrate surface 143.8 g of water per square meter, which must be transported by diffusion through the tube wall.
  • the starting tube is only slightly moistened with the stated swelling value of approx.
  • 1 means a supply roll with hose 2 wound thereon; 3 is a hose drawn off the supply roll and moved in the direction of its longitudinal axis; 4 is a horizontal hose loop which rests on a base 5; 6 is a rotatable deflection roller attached to the top of the base 5; 7 is a piece of tubing slanting from top to bottom in the direction of tube travel; 8 is a pair of rollers for feeding coating liquid 11 and for preventing the coating liquid 11 from flowing back into the hose loop 4; 9 is a deflecting roller and 10 is a piece of hose running vertically from bottom to top; 12 is the level of the coating liquid 11 in the cavity of the vertical tube piece; 13 is a collaborative pair of endless belts; 13a is its first and 13b its second conveyor belt-like endless belt; 14a is a straight part of the first and 14b a straight part of the second endless belt; 15a is a curved part of the first endless belt and 15b is a curved part of the second endless belt
  • the numbers 1 to 12 and 22 to 31 have the same meaning as in FIG. 1; 32 means the guide or shaped element pair with its shaped elements 32a and 32b; 19 is the cavity delimited by the elements; 20 is the cavity inlet and 21 is the cavity outlet that forms the metering gap.
  • the gap 19 is formed by two shaped elements 34 and by two smooth metering rollers 33.
  • the shaped elements 34 form the gap space entrance and form the tube in a wedge shape in the direction of the metering gap 21, which is formed by the metering rollers 33.
  • the remaining digits in FIG. 3 correspond to the respective digits and terms in FIGS. 1 and 2.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Coating Apparatus (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Circuits Of Receivers In General (AREA)
  • Superheterodyne Receivers (AREA)
EP81102079A 1980-03-28 1981-03-20 Verfahren zur Herstellung einer schlauchförmigen Verpackungshülle mit einem Überzug auf der Innenseite und Vorrichtung zur Durchführung des Verfahrens Expired EP0037494B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81102079T ATE7667T1 (de) 1980-03-28 1981-03-20 Verfahren zur herstellung einer schlauchfoermigen verpackungshuelle mit einem ueberzug auf der innenseite und vorrichtung zur durchfuehrung des verfahrens.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3012252 1980-03-28
DE3012252A DE3012252C2 (de) 1980-03-28 1980-03-28 Verfahren zur Herstellung eines Schlauchs auf Basis von Cellulosehydrat mit einem Überzug auf der Innenseite sowie Vorrichtung zur Durchführung des Verfahrens und Verwendung des Schlauchs

Publications (2)

Publication Number Publication Date
EP0037494A1 EP0037494A1 (de) 1981-10-14
EP0037494B1 true EP0037494B1 (de) 1984-05-30

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EP81102079A Expired EP0037494B1 (de) 1980-03-28 1981-03-20 Verfahren zur Herstellung einer schlauchförmigen Verpackungshülle mit einem Überzug auf der Innenseite und Vorrichtung zur Durchführung des Verfahrens

Country Status (6)

Country Link
US (1) US4353940A (enrdf_load_stackoverflow)
EP (1) EP0037494B1 (enrdf_load_stackoverflow)
JP (1) JPS56150454A (enrdf_load_stackoverflow)
AT (1) ATE7667T1 (enrdf_load_stackoverflow)
DE (2) DE3012252C2 (enrdf_load_stackoverflow)
FI (1) FI68774C (enrdf_load_stackoverflow)

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DE3113959C2 (de) * 1981-04-07 1983-02-03 Hoechst Ag, 6000 Frankfurt Verfahren zur Innenbeschichtung eines Schlauchs sowie Anordnung zur Durchführung des Verfahrens
DE3219525C2 (de) * 1982-05-25 1984-09-06 Hoechst Ag, 6230 Frankfurt Vorrichtung zum Fördern eines flexiblen Schlauches und des darin eingeschlossenen fließfähigen Mediums
DE19637795C1 (de) * 1996-09-17 1997-10-09 Rothenberger Rohrsanierung Gmb Verfahren und Vorrichtung zum Herstellen eines Schlauchs zum Auskleiden von Rohrleitungen und Kanalsystemen
US20080210290A1 (en) * 2006-04-14 2008-09-04 Dau Wu Plasma inside vapor deposition apparatus and method for making multi-junction silicon thin film solar cell modules and panels
RU2488450C2 (ru) * 2010-04-27 2013-07-27 Борис Владимирович Скворцов Способ нанесения покрытия на внутреннюю поверхность трубы
DE102010047094A1 (de) * 2010-10-01 2012-04-05 World-Pac International Ag Verpackungshülle für Lebensmittel
RU2503506C2 (ru) * 2011-12-29 2014-01-10 Общество с ограниченной ответственностью "Аналитические приборы и системы" Система автоматического управления нанесением изолирующего покрытия на внутреннюю поверхность изделий цилиндрической формы
DE102016118049B4 (de) 2016-09-23 2021-07-22 Thöni Industriebetriebe Gmbh System und Verfahren zum Herstellen eines Schlauches
RU2656664C1 (ru) * 2017-07-11 2018-06-06 федеральное государственное автономное образовательное учреждение высшего образования "Самарский национальный исследовательский университет имени академика С.П. Королёва" Способ нанесения изолирующих покрытий на внутреннюю поверхность трубы
RU189001U1 (ru) * 2018-11-12 2019-05-06 федеральное государственное автономное образовательное учреждение высшего образования "Самарский национальный исследовательский университет имени академика С.П. Королева" Устройство нанесения изолирующих покрытий на внутреннюю поверхность трубы
JP7263995B2 (ja) * 2019-09-17 2023-04-25 株式会社プロテリアル チューブ製造装置及びチューブ製造方法

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DE2659000A1 (de) * 1976-12-27 1978-07-06 Hoechst Ag Foerder- und pumpvorrichtung zur innenbeschichtung von schlaeuchen
EP0001545A1 (de) * 1977-08-05 1979-05-02 Hoechst Aktiengesellschaft Schlauchförmige Hülle, insbesondere Verpackungshülle, z.B. Wursthülle auf Basis von Cellulosehydrat und Verfahren zu ihrer Herstellung

Also Published As

Publication number Publication date
FI810940L (fi) 1981-09-29
ATE7667T1 (de) 1984-06-15
DE3163832D1 (en) 1984-07-05
DE3012252A1 (de) 1981-10-08
JPS6351742B2 (enrdf_load_stackoverflow) 1988-10-14
US4353940A (en) 1982-10-12
JPS56150454A (en) 1981-11-20
FI68774C (fi) 1985-11-11
EP0037494A1 (de) 1981-10-14
FI68774B (fi) 1985-07-31
DE3012252C2 (de) 1982-09-23

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