US20140121324A1 - Mono- or Multi-Layer Film - Google Patents

Mono- or Multi-Layer Film Download PDF

Info

Publication number
US20140121324A1
US20140121324A1 US14/061,838 US201314061838A US2014121324A1 US 20140121324 A1 US20140121324 A1 US 20140121324A1 US 201314061838 A US201314061838 A US 201314061838A US 2014121324 A1 US2014121324 A1 US 2014121324A1
Authority
US
United States
Prior art keywords
film
sliding
tube
preliner
pipe
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.)
Abandoned
Application number
US14/061,838
Other languages
English (en)
Inventor
Abdel-Kader Boutrid
Kurt Stark
Franz Schleicher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Buergofol GmbH
Original Assignee
Buergofol GmbH
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
Publication date
Application filed by Buergofol GmbH filed Critical Buergofol GmbH
Assigned to Buergofol GmbH reassignment Buergofol GmbH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: Boutrid, Abdel-Kader, SCHLEICHER, FRANZ, DR., Schleicher, Gregor, STARK, KURT, DR.
Publication of US20140121324A1 publication Critical patent/US20140121324A1/en
Priority to US15/679,253 priority Critical patent/US10040935B2/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • C08L67/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C08L67/03—Polyesters derived from dicarboxylic acids and dihydroxy compounds the dicarboxylic acids and dihydroxy compounds having the carboxyl- and the hydroxy groups directly linked to aromatic rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/16—Devices for covering leaks in pipes or hoses, e.g. hose-menders
    • F16L55/162—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe
    • F16L55/165—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section
    • F16L55/1652—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section
    • F16L55/1654—Devices for covering leaks in pipes or hoses, e.g. hose-menders from inside the pipe a pipe or flexible liner being inserted in the damaged section the flexible liner being pulled into the damaged section and being inflated
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C08J2367/02—Polyesters derived from dicarboxylic acids and dihydroxy compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers

Definitions

  • the invention refers to a one- or multilayered film, in which the film comprises at least one coating that contains a possibly modified thermoplastic olefin homo or copolymer.
  • Such films have been known for a long time.
  • Products made of polyethylene (PE), for example, and especially those made of low density polyethylene (LDPE) are trash bags, shrink films and agricultural films.
  • PE polyethylene
  • LDPE low density polyethylene
  • numerous multi-layered films are known that have three, five or seven layers, for example, from which one or several contain PE or PP (polypropylene).
  • such an insertion tube typically has an inner and outer tube with a carrier material (such as glass fibers) inserted between them that has been impregnated with reactive plastic resin.
  • a carrier material such as glass fibers
  • reactive plastic resins are, for example, commercially available UP resins (polyester/unsaturated polyester resins), VE resins (vinyl ester resins) or EP resins (epoxy resins).
  • UP or VE resins are hardened with the help of photoinitiators. but heat can also harden them.
  • the insertion tube is inflated inside the pipe until it presses tightly against the inner wall of the pipe or the sliding film in order to subsequently harden the resin—with ultraviolet light from a UV light source being pulled slowly through the pipe, for example.
  • the inner film of the insertion tube is peeled off and removed. The layer with the carrier material is then exposed to the substances guided through the pipe.
  • a preliner (also known as preliner film) is often inserted into the pipe to be renovated—in particular in the case of the synthetic fiber-tube liner system with warm water or steam curing.
  • a preliner typically made of high density polyethylene (HDPE)
  • HDPE high density polyethylene
  • the preliner is directly laid on the inner wall of the pipe.
  • the tube liner is inserted into the pipe (insertion process) or inverted (inversion process).
  • the preliner prevents, for example, the tube liner's plastic resin from adhering to the pipe wall and the still unhardened resin from making contact with dirt and water.
  • the preliner film also prevents the resin from seeping out of the sewer pipe renovation system and contaminating the soil and ground water.
  • the preliner film also protects the feeds from penetrating excess resin so no resin plugs and obstructions can form.
  • a preliner takes over a function that reduces the sliding friction, similar to the one described for the sliding films described above, for the tube liner that will be inserted. In this case, the low coefficient of friction between the sliding film or preliner and the outer film of the tube liner is what matters.
  • the insertion tube or tube liner is not damaged by the pipe's inner wall or objects inside the pipe when it is inserted into the pipe and, on the other hand, the friction between tube liner and gliding film or the preliner is very low, thus facilitating retraction of the tube liner. Therefore, the preliner can also be called a sliding tube.
  • the disadvantage of the HDPE film used as sliding film or preliner mentioned above is, among other things, its required thickness of approx. 500 ⁇ m to 800 ⁇ m or more, which translates into a large quantity to maintain more or less its mechanical stability and strength. Otherwise, the sliding film or preliner would develop cracks owing to the mechanical stresses inside the pipe caused especially by sharp or rough uneven surface irregularities and would no longer be able to fulfill its purpose.
  • the known HDPE film has a very large elongation capability that can even reach 200%.
  • an “accordion effect” can occur when the tensile force is removed (i.e. the film contracts when this occurs).
  • the sliding film or preliner can contract once again, in which case there is a risk that the sliding film or preliner and the insertion tube will create an obstruction in the sewer pipe to be renovated.
  • HDPE reaches maximum strength already during sudden dynamic elongation. With further pulling (for example, with an even more forceful jerk), the film will start yielding irreversibly until it tears. Therefore, there is the danger of an uncontrollable retraction of the insertion tube, which therefore can get stuck in the pipe and may not be easily removed or properly inserted any longer.
  • the materials currently used in the PE films in the state of the art are inadequate with respect to their mechanical properties such as (additional) tear strength, tensile strength, impact strength or puncture resistance.
  • PE films used as preliner film in the state of the art have no barrier effect either against resin components such as styrene, for example.
  • films according to the invention boast good mechanical properties such as sturdiness, resistance, puncture resistance, good inherent stability, low elongation capability and good sliding properties.
  • the films according to the invention are ideally suitable for use as gliding film or preliner in trenchless sewer pipe renovation.
  • the film is used, for example, as one such sliding film or preliner (sliding tube), then it is first of all highly resistant and secondly the insertion tube can be pulled through the pipe with only little friction.
  • the coefficient of friction (COF) against another film having a PE outer coating is between 0.05 and 0.5, preferably between 0.1 and 0.3.
  • the tear and additional tear resistance of films according to the invention are very high—in other words, the films can virtually not be torn and when they have been ripped, then the force used for ripping them further is very high. Additionally, they stretch very little or negligibly so in machine direction (md), i.e. in the moving direction during film manufacturing. In other words, a very strong force in machine direction is necessary to achieve some stretching at all and this prevents the “accordion effect” mentioned above.
  • the film according to the invention can be advantageously used as packaging material for food products or in the so-called non-food sector, especially as deep-drawing film for bowls, cups, plates, troughs and trays.
  • the food to be packaged can be, for example, fresh food or frozen products such as fresh meat, cooked, cured and processed meat, poultry, fruit and vegetables, fish and shellfish, bread, cakes & pastries, prepared foods, snacks, sweets and confectionary.
  • animal feed, medical articles as well as consumer and industrial goods can be packaged with the film according to the invention: Electronics, household & cleaning products, office supplies, craft accessories as well as industrial components and spare parts, for example.
  • the film according to the invention can also be used for external paneling, external coverings of building parts, and protective suits, signs as well as for any kind of scoreboard, display or as insulating material.
  • olefin homo- or copolymers are thermoplastic polymers of ⁇ , ⁇ -unsaturated olefins with two to six carbon atoms, for example, such as polyethylene (PE, especially LDPE or HDPE), polypropylene (PP), polybutylene (PB), polyisobutylene (PI) or mixtures of at least two of the polymers mentioned above.
  • PE polyethylene
  • LDPE low density polyethylene
  • LDPE low density polyethylene
  • HDPE indicates a high density polyethylene whose molecular chain is characterized by little branching and its density can lie within the range of 0.94 and 0.97 g/cm 3 .
  • a preferred embodiment contains at least one coating with more than 50% by weight of thermoplastic olefin homo- or copolymer and 0.1 to 50% by weight of polyester.
  • An alternative, especially preferred embodiment of the invention has at least one coating with more than 50% by weight of polyester and 0.1 to 50% by weight of thermoplastic olefin homo or copolymer.
  • said embodiment contains at least one coating between 10% by weight and 35% by weight of thermoplastic olefin homo- or copolymer.
  • polyester in amorphous form in at least one coating has proven especially suitable.
  • amorphous polyethylene terephthalate (A-PET) has been particularly useful.
  • A-PET is preferably used as material, and can also be regenerated or recycled. Likewise, own chaff made up of edge trims, etc. can be used.
  • Commercially available A-PET is easily obtainable under the name Wellman PermaClear® made by the American firm DAK Americas, Novapet® made by Novapet S.A. of Spain, or Texpet R made by Texplast GmbH of Wolfen [Germany] or SABIC® PET.
  • said coating contains at least one polyester, especially in form of A-PET, in more than 25% by weight, preferably in more than 40% by weight and especially preferable in more than 50% by weight, particularly in more than 65% by weight.
  • thermoplastic olefin homo- and/or copolymer to A-PET or their presence leads to a considerable improvement of toughness, tensile strength and additional tear resistance.
  • the olefin homo- or copolymer in said coating has also been determined as advantageous for the olefin homo- or copolymer in said coating to have a glass transition temperature Tg in the range from ⁇ 90° C. to +110° C., especially from ⁇ 80° C. to +40° C. This reduces the excessively high stiffness of the polyester, particularly of A-PET, and lowers the elastic modulus of the film.
  • the olefin homo- or copolymer is preferably polyethylene (PE), used preferably in the form of high density polyethylene (HDPE). Additionally, LDPE and/or LLDPE (linear low density polyethylene) can be advantageously used, as well as polyolefins, especially polyethylene polymerized on the basis of metallocen catalysts (mPE), such as mLDPE (metallocen LDPE) and mLLDPE (metallocen LLDPE). Polyethylene is classified in different categories, mainly with regard to its density and branching. Its mechanical properties depend greatly on variables like length and type of branching, crystalline structure and molecular weight. The most frequently sold polyethylenes are HDPE, LLDPE and LDPE. Specifically, the polymer order looks like this:
  • VLDPE very low density polyethylene
  • VLDPE very low density polyethylene
  • VLDPE is defined by its density range of 0.880 to 0.915 g/cm 3 . It is essentially a linear polymer with a high proportion of short side chains, typically manufactured by linear copolymerization of ethylene with short-chained alpha olefins (e.g. 1-butene, 1-hexene, and 1-octene). VLDPE is very frequently manufactured using metallocen catalysts because they allow more the insertion of more co-monomers.
  • polypropylene is used as olefin homo- or copolymer.
  • the HDPE material used according to claim 1 as in the mixture of said coating according to the invention is Hostalen® made by LyondellBasell Industries, for example.
  • the at least one olefin homo- or copolymer in the at least one coating mentioned above according to claim 1 can be formed as adhesion promoter or be provided or modified with adhesion-promoting functional groups.
  • an adhesion promoter or olefin homo- or copolymer with an adhesion-promoting function contains the corresponding functional groups such as epoxy groups, peroxide groups, ketone groups, aldehyde groups, (carboxylic) acid groups, amine or amide groups, acid anhydride groups and/or hydroxyl groups, for example.
  • Such functionalization can improve the compatibility of the polyester and polyolefin polymers deemed to be essentially incompatible.
  • modification with at least one organic acid or at least one organic acid anhydride preferably with a cyclic organic acid anhydride.
  • modification with maleic acid anhydride groups because these groups act like adhesion promoters between the at least one polyester and the at least one olefin homo- or copolymer.
  • At least one coating mentioned above according to claim 1 is likewise possible for the at least one coating mentioned above according to claim 1 to contain unmodified polyolefin in addition to modified polyolefin.
  • the functionalized polymers mentioned above can be used as compatibilizers or conventional adhesion promoters too.
  • they are added in small quantities of 0.1 to 10% by weight to the olefin homo- or copolymer in the at least one coating mentioned above.
  • the different components A-PET and polyolefin can be mixed in advance through compounding to improve the homogeneity of the mixture even more.
  • the film according to the invention has preferably a thickness of 20 to 2000 ⁇ m, better from 50 to 1500 ⁇ m, even better from 100 to 1000 ⁇ m, and ideal from 200 to 900 ⁇ m.
  • the latter coating thickness range has proven to be the especially useful.
  • the film according to the invention has at least one discrete barrier coating.
  • barrier coating is based preferably on ethylene vinyl alcohol (EVOH) or polyamide (PA) or both.
  • EVOH ethylene vinyl alcohol
  • PA polyamide
  • the barrier coating is advantageous as obstacle for monomers such as styrene and/or oils and fats.
  • the chemical compound that performs the barrier function e.g. PA
  • PA can be present up to 100% in the barrier coating.
  • the film according to the invention can have an independent coating that contains at least one chemical compound acting as barrier against chemical substance penetration, preferably against monomers such as styrene and/or at least one that acts as barrier against UV and (advantageously) visible light.
  • the use of polyamide as chemical compound for the barrier effect has been advantageous.
  • UV radiation in the wavelength range of 200 to 400 nm and visible light radiation in the wavelength range of 400 to 800 nm is absorbed and/or reflected, preferably more than 90%.
  • organic and/or inorganic color pigments, dyes or compounds can be used, all known to the specialist (see, for example, DE 10 2009 041 841A1).
  • the film according to the invention contains at least one independent coating with at least chemical compound acting as mechanical barrier and at least one chemical compound to achieve a UV barrier and a barrier against ranges of visible light.
  • the following components or additives can be added during extrusion in one or several coatings, up to a maximum of 15% by weight.
  • Some of the additives that can be used are, for example: optical brighteners, thermal stabilizers, antioxidants, oxygen scavengers, slip agents, spacers (e.g. silica particles, SAS), slipping/antiblocking agents, colors, pigments, foaming agents, antistatic agents, process aids, lubricating agents, flame retardants, flame inhibitors, impact modifiers, impact resistance improvers, anti-hydrolysis agents, UV absorbers.
  • UV protection agents stabilizers, antifogging additives, waxes, wax additives, release agents, sealing or peeling additives, nucleating agents, compatibilizers, flow agents, flow improvers, melt strength enhancers, molecular weight increasers, cross-linkers or softeners.
  • the film according to the invention can have a mono- or multi-layer structure.
  • intermediate and/or covering coatings can be provided—in addition to said film—with at least one coating having a thermo-plastic olefin homo- or copolymer, and at least one polyester.
  • an external coating can be, for example, a pure A-PET external coating, generally a polyester coating, or a pure HDPE external coating, generally a polyolefin coating.
  • both external coatings can be executed as polyester coatings.
  • polyesterpolyolefin mixtures are also possible in one or both external coatings. Needless to say, it is also possible to provide a pure polyester coating on one external side and a pure polyolefin coating on the other external side, while said mixture coating according to claim 1 (which contains at least one thermoplastic olefin homo- or copolymer and at least one polyester) is arranged between these external coatings.
  • One or several intermediate coatings are in any case possible.
  • the films according to the invention can be manufactured in various ways.
  • a preferred manufacturing method uses extrusion or coextrusion, for example through bubble extrusion or cast extrusion.
  • a possible extrusion process is chill roll.
  • both individual and all coatings of the film according to the invention can be formed by extrusion, particularly through bubble film extrusion and/or flat film extrusion, especially bubble film co-extrusion and/or flat film coextrusion.
  • the flat film coextrusion process has proven to be very suitable in this case.
  • extrusion coating is also possible, as is a smoothing process.
  • lamination techniques can also be used.
  • the film according to the invention can be laminated with additional films in order to obtain a film combination, in which for example thermal lamination, extrusive lamination or adhesive lamination is used.
  • lamination with one film that corresponds to the material of the external film described above for the insertion tube is recommended.
  • an advantageous basis of the lamination film is a polyolefin, in which case a PE basis for the lamination film is preferred.
  • a PE basis for the lamination foil is preferred in an embodiment because during the course of exothermic curing of the reactive resins acting as carrier material in the insertion tube through temperature increase owing to initiation with UV light (or hot water or steam as alternate sources for resin curing, for example), a joining of the sliding film or preliner—containing at least one thermoplastic olefin homo- or copolymer—can also be done on the (cured) insertion tube.
  • a film combination that comprises a film according to the invention and at least one additional (preferably laminated) film, a light protection film as such additional film.
  • This light protection film is preferably one that absorbs and/or reflects UV light and advantageously visible light as well (at least a part of the visible spectrum, preferably short-wave visible light).
  • UV radiation is preferably absorbed and/or reflected in the wavelength range from 200 to 400 nm and the visible light rays in the wavelength range from 400 to 800 nm at least partially, preferably by more than 90% and very preferably by more than 99%.
  • the film according to the invention prevents transmission largely to almost fully in the wavelength range from 300 to 500 nm, preferably from 350 to 450 nm.
  • organic and/or inorganic color pigments, dyes and compounds can be used that are known to the specialist (see above: DE 10 2009 041 841A1).
  • the UV- and, if need be, light protective film can be totally opaque or clear or at least contact transparent.
  • a film according to the invention used as sliding film or preliner such a UV and, if need be, light protective film is preferably laminated on the film's external side facing the resin-impregnated carrier material and advantageously borders the external film of the insertion tube.
  • such a laminated UV—and, if need be, light protection—film can contain chemical compounds with a barrier function with respect to monomers, resins, oils, fats, gases, etc. in particular.
  • chemical compounds with a barrier function with respect to monomers, resins, oils, fats, gases, etc. in particular.
  • the corresponding chemical compounds acting as barrier can be contained in the laminated film.
  • a film with such a barrier layer can also be laminated—alternately or additionally—to the UV and, if need be, light protective film—on a film according to the invention in accordance with claim 1 .
  • the film combination mentioned above from said film can be used as preliner (sliding tube) and advantageously laminated UV and, if need be, light protection film—if possible with at least one chemical compound acting as barrier (e.g. EVOH, PA, see above)—as outer tube (also known as external tube) for a tube liner system.
  • barrier e.g. EVOH, PA, see above
  • the tube liner that is generally used which consists at least of inner film (internal film), resin-impregnated carrier system, and outer film (external film) is modified by joining the external film (UV and, if need be, light protection film) in a laminar way with the preliner (sliding tube).
  • the “slimmed down” tube liner no longer comprises the external tube or external film, but merely just the resin-impregnated carrier system and the inner tube film (as well as, if need be, additional films or layers).
  • the integrated anti-slip film or combination film of sliding foil and UV light protection film can only represent partially the external system of a tube liner in an especially preferred embodiment.
  • a sliding film is laminated with a UV and light protection film (which has a barrier against monomers such as styrene), in which case this combination film only forms the lower section of the external film of the tube liner (e.g. a lower half-shell).
  • the upper part of the external system, which constitutes a flexible UV and light protection film with styrene barrier is then joined to the lower anti-slip film or the lower external film—through sealing, for example—to become one single tube.
  • the longitudinal edges of the non-laminated part of the external film are preferably sealed with the longitudinal edges of the open sliding film or the section of the external film laminated on the sliding film, in other words, the lower part of the external system.
  • the upper and lower part of the external film has preferably the same layer structure and the same layer compositions, although their layer and overall strengths may also vary.
  • a largely semicircular sliding film in cross section is laminated with a tube-shaped UV and light protection film, which in turn boasts a barrier against monomers such as styrene.
  • the lower part of this combination film constitutes, for example, a lower half-shell, while the upper part is formed by the other, non-laminated, half of the tube-shaped UV and light protection film.
  • the entire tube liner (inner tube, resin-impregnated carrier material, external tube) is joined to a preliner (sliding tube) comprising the layer according to the invention, so that this joining is inserted as a whole into the pipe to be renovated.
  • the preliner (sliding tube) can furthermore be laminated in form of a flat film with an UV and light protection film that is preferably also a barrier against monomers and oils such as styrene or gases and is present likewise in form of a flat film, in order to be subsequently sealed or welded to a tube.
  • an UV and light protection film that is preferably also a barrier against monomers and oils such as styrene or gases and is present likewise in form of a flat film, in order to be subsequently sealed or welded to a tube.
  • the film according to the invention can also be subsequently stretched or embossed. Printing is possible too.
  • the structuring of the film surface can additionally de done through pouring on a correspondingly structured roller.
  • the film surface is roughened by adding separators (antiblocking agents) by preparing a batch with coarser particles having a diameter of 0.01 to 10 ⁇ m, for example.
  • Silica particles are used in at least one of the outer layers, for example, to prevent the sliding film or preliner from adhering to the insertion tube.
  • a powder or talc can be still added to the surface(s) of the film.
  • Talcum for example, is preferred for this.
  • the friction value of the sliding film or preliner according to the invention is preferably small compared to the external film of the insertion tube that is inserted into the sewer pipe for renovation purposes with the help of the sliding film or preliner.
  • a lowering of the coefficient of friction (COF) can be accomplished, for example, with wax additives such as ethylene-bis-stearamide (EBS), erucic acid amide (EAA), etc., and with release agents. These wax additives or release agents are preferably applied on the surface of the sliding film facing the external film of the tube liner.
  • the film according to the invention can also be foamed or at least contain a foamed coating. Even the coating according to the invention that contains, for example, a mixture of PE and A-PET can be foamed, something that also constitutes a preferred embodiment.
  • the film according to the invention is laminated with a non-woven material, textile, needle felting, synthetic fibers or fleece.
  • the lamination in particular, is done with a material capable of absorbing liquids and resins.
  • a lamination of the film according to the invention that additionally has a UV and light protection film with or without barrier
  • a non-woven material is likewise possible.
  • the film according to the invention laminated against a UV and light protection film that, in turn, has already been laminated with a non-woven material.
  • the lamination with the film according to the invention against the UV and light protection film takes place preferably on the side of the UV and light protection film that has not been laminated with the non-woven material.
  • the side laminated with a non-woven material here the UV and light protection film including the barrier
  • FIG. 1A sewer pipe to be renovated with a preliner (sliding tube), in cross section;
  • FIG. 2 A sewer pipe to be renovated with a sliding foil, in cross section
  • FIG. 3 A cross section through the preliner or sliding film according to FIG. 1 or FIG. 2 ;
  • FIG. 4 A sewer pipe to be renovated with a preliner (sliding tube) with a laminated UV protection film, in cross section;
  • FIG. 5 A cross section through the preliner and the laminated UV protection film, in cross section;
  • FIG. 6 A sewer pipe to be renovated with a preliner and a tube liner; in cross section;
  • FIG. 7 A sewer pipe to be renovated with a sliding film and a first, lower external tube laminated on the sliding film as well as a second, upper external tube sealed on this joining, in cross section;
  • FIGS. 8 , 8 a , 8 b A schematic cross section through a shell, especially for food, as well as two enlarged detailed views of two different film structures.
  • FIG. 1 shows a sewer pipe K to be renovated in cross section, in which a preliner 1 (sliding tube) is inserted according to the invention.
  • a largely semicircular sliding film 2 in cross section is shown in FIG. 2 ; it has been correspondingly applied on the lower semicircular shell of sewer pipe K.
  • the preliner 1 according to FIG. 1 and the sliding film 2 according to FIG. 2 have a coating 3 with the mixture according to the invention of at least one thermoplastic olefin homo or copolymer (modified if need be), and at least one polyester (see claim 1 ). They are mechanically resistant and also have low friction so a tube liner can be inserted.
  • FIG. 3 shows a possible 3-layered structure of the preliner 1 according to FIG. 1 in cross section or of the sliding film 2 according to FIG. 2 .
  • said coating 3 with said mixture is arranged between two external coatings 4 , 5 that both contain 100% polyester, e.g. A-PET (see also the corresponding example 1 below).
  • at least one independent barrier coating (and, if need be, additional coatings) to resist penetration by gases and/or chemical substances can be provided in addition to coating 3 , preferably on the basis of ethylene vinyl alcohol (EVOH) or polyamide (PA) or both and more preferably in each case made 100% of these compounds.
  • This or another coating can at least contain a chemical compound acting as barrier against UV light and visible light to at least largely prevent radiation in the 350 to 450 nm wavelength range.
  • FIG. 4 shows that a film 6 has been laminated on the preliner 1 according to FIG. 1 or such film was formed through coextrusion.
  • the additional film 6 has been executed as UV protection film with barrier function against styrene, for example.
  • the film 6 laminated on the preliner 1 has a five layer structure having, for example, the coating succession of polyethylene ( 6 a )/HV ( 6 b )/polyamide ( 6 c )/HV ( 6 d )/polyethylene ( 6 e ).
  • this film 6 resembles an external tube film that—unlike the state of the art—is not connected to a tube liner, but to the preliner 1 .
  • such a tube liner comprises, in its easiest form, typically an internal tube or a tube-shaped internal film, a carrier system with a resin curable with UV and an external tube or a tube-shaped external film.
  • the external tube 6 forms a composite film together with the preliner 1 .
  • the tube liner to be used subsequently has therefore, appropriately, no external tube any longer.
  • another film has been laminated between the preliner 1 and the additional external film (outer film) 6 (or even additional films), for example an own or additional UV protection film.
  • Such a composite can also be manufactured through coextrusion.
  • FIG. 6 shows a complete system of a sewer pipe K to be renovated, into which a preliner 1 has been inserted.
  • the outer film 6 can either be joined to the preliner 1 (see FIG. 4 ) or be a part of the tube liner 7 (structured as known), which then has an internal film (inner film) 9 , a resin carrier system 8 and said external film (outer film) 6 .
  • the preliner 1 and the entire tube liner 7 can constitute one single composite that is then introduced into the sewer pipe K.
  • the tube-shaped preliner 1 with a laminated additional film (top: the outer film 6 ) can be preserved by means of extrusion lamination or also through sealing of the laminated film composite.
  • Such an especially preferred composite structure is manufactured through coextrusion.
  • FIG. 7 shows a variant in which a sliding film 2 —largely in semicircular shape in cross section in the state installed in the sewer pipe—is laminated with an outer film 6 ′ executed as UV and light protection film, including styrene barrier, which once installed in the sewer pipe, then takes a semicircular shaped state in cross section as well.
  • This outer film 6 ′ constitutes the lower part of the external system of a tube liner 7 .
  • the upper part of the external system is formed by an additional outer film 6 ′′ likewise executed as flexible UV and light protection film with styrene barrier (without being laminated with the sliding film 2 ).
  • the two outer films 6 ′ and 6 ′′ which preferably have the same coating structure and the same coating composition, are in this case sealed together to form a tube on the sealing spots 10 running in tube direction (normal to the drawing plane).
  • the upper outer 6 ′′ film can be sealed with the sliding film 2 .
  • the remaining part of the tube liner 7 separate from the two semicircular outer films 6 ′ and 6 ′′ is made here, once again, of a resin carrier system 8 and an inner film 9 .
  • FIG. 8 shows a schematic cross section of a well-known form of a preferably deep-drawn shell 15 used for packaging food products (cheese, cold cuts, etc.) and a film structure according to the invention with regard to its bottom that has side walls.
  • the shell 15 or trough can be sealed with an upper film 16 , in which case the known systems of permanent seal, easy peel or reclosure can be used. These sealing systems can be installed in the lower film and/or upper film.
  • the film 11 lower film
  • the film 11 from which the shell 15 consists of, has an inner layer 3 , which is executed according to claim 1 , i.e.
  • FIG. 8 a shows schematically that layer 3 —with its mixture of olefin homo or copolymer and polyester—is not foamed, whereas layer 3 is foamed according to FIG. 8 b .
  • the films shown in FIG. 8 can additionally be coextruded with one or several additional layers and/or laminated with one or several additional films, for example with those having a barrier function.
  • the film according to example 1 had an three-layered A-B-A structure, a make-up of 50:410:50, an overall thickness of 510 ⁇ m and a basis weight of 661 g/m 2 and with this a medium density of 1.296 g/cm 3 ;
  • the film according to example 4 was laminated with a 230- ⁇ m thick PE-HV-PA-HV-PE film (5-layer film).
  • the (laminated) film from example 5 with a width of 500 mm was sealed on both external longitudinal edges with a likewise 500-mm wide, 230- ⁇ m thick PE-PA-PE film in such a way that the result was a closed tube (circumference approx. 1000 mm).
  • the PE side of the combination film from example 5 was sealed with the PE side of the non-laminated 230- ⁇ m thick PE-PA-PE UV and light protection film.
  • the PE-PA-PE-film was completely impenetrable to UV radiation and visible light radiation (UV-Vis transmission in the 200 nm to 800 nm wavelength range under 0.5%).
  • antiblocking agents prevent the adhesion of the film according to the invention to another material.
  • Antiblocking agents are, for example, solids that generate micro roughness on the plastic surface and as a result of that create an ultra thin air layer as separating layer when two films are placed on top of one another or when the films are moved with regard to one other.
  • the external layer containing the antiblocking agent faces the insertion tube, in which case the insertion tube, when pulled over the sliding foil or preliner installed in the pipe will not adhere to this external film of the sliding film or preliner.
  • Whitish cloudy commercially available HDPE film (mono film), already used as sliding film in the sewer pipe renovation field; manufacturing through cast extrusion; thickness 500 ⁇ m.
  • Material Hostalen® GD 4755, density 0.953 g/cm 3 .
  • Whitish cloudy commercially available HDPE film mono film
  • samples were manually prepared (samples cut to the testing mass) and stored for 24 hours before testing under normal climate conditions of 23° C. and 50% relative humidity.
  • the measurement of the tensile properties was done according to Part 3 of German Industrial Standard DIN EN ISO 527.
  • the tensile strength ⁇ max of a plastic film is given in N/mm 2 .
  • the elongation at break ⁇ B indicates in % to what extent the film can be stretched before it tears.
  • the testing device for the tensile tests was a universal testing machine Zwick/Roell Z020 in the “Makro 50 mm” mode with a macro displacement transducer for measuring the elastic modulus.
  • the test was performed on strips with a length of 140 mm and a width of 15 mm under a speed of 1 mm/min for the tensile modulus and a testing speed of 500 mm/min for the tensile strength.
  • the preload was 1 N
  • the maximum load of the load cell was 2500 N.
  • the measurement of the additional tear resistance was performed according to German Industrial Standard DIN 53363—Trapezium.
  • the force in the tear force F max expressed in N is understood to be the force necessary for tearing a piece of plastic film.
  • the testing device for measuring the additional tear resistance was the universal testing machine Zwick/Roell Z020 mentioned above, in the “Traverse L 50 mm” mode with a traverse displacement transducer. The test was performed on strips having a length of 120 mm and a width of 50 with a 25-mm notch according to DIN 53363—Trapezium. The testing speed was 300 mm/min and the speed of the tensile modulus 300 mm/min as well. The preload was set at 1 N.
  • the testing device used for measuring penetration resistance was the Instron/CEAST 9350 drop hammer testing device.
  • the dimensions of the testing body were 60 ⁇ 60 mm 2 .
  • In the contact surface there was a circular recess with a diameter of 40 mm for allowing the passing of the hammer, whose mass was 5 kg.
  • the penetration speed was 4.4 m/s.
  • the puncture that took place was measured at 50% (average from several measurements).
  • Tab. 1 lists the measurement results of the tensile tests.
  • the disadvantageous values are printed in italics in the lines for V1 and V2.
  • Especially disadvantageous values are in bold italics.
  • the particularly advantageous values in the lines for B1 and B2 are printed in bold.
  • elongation at failure in example B1 lies merely at 3.5% and in example B2 merely at 3.6% in md.
  • Stretching at the yield point (yielding elongation) lies in B1 only at 3.5% in md.
  • Elongation at failure in machine direction (md) lies for B1 merely at 3.5% and for B2 merely at 3.6%.
  • the two films B1 and B2 are additionally very little anisotropic in machine direction (md) and cross direction (cd).
  • the films B1 and B2 according to the invention thus need, on the one hand, considerably more tensile stress for a stretch (of 1% and 2.5%) and therefore higher tensile strength than the comparative examples V1 and V2, something that is very advantageous for the use as sliding film for insertion tubes (tube liners) in trenchless sewer pipe renovation.
  • the slide film remains unchanged in its place in the case of B1 and B2 and does not stretch when the insertion tube is pulled through the sewer pipe.
  • the “accordion effect” is therefore almost fully or completely prevented when the insertion tube is no longer being pulled, so that the system can no longer be pulled back as soon as the tensile strength ceases.
  • the sliding films according to the invention therefore serve for ideally “guiding” the insertion tube in the sewer pipe to be renovated.
  • the tensile test thus shows that the films B1 and B2 according to the invention hardly stretch—neither in cross direction (cd) nor in the important machine direction (md). Stretching at the yield point epsilon Y ( ⁇ Y ; yielding elongation) for B1 is only approx. 1/10 of the stretching determined for film V1. The same applies to B1 and B2 for maximum stretching epsilon M ( ⁇ M ). The elongation at failure epsilon B ( ⁇ B ) is for the films B1 and B2 according to the invention lower by about a factor of 20 compared to V1 and by about a factor of 24 compared to V2.
  • the shape and dimension of the films B1 and B2 according to the invention remain almost unchanged when the insertion tube that slides on the sliding film is pulled through the sewer pipe.
  • the films resist large forces acting on them and are sturdy. Thus, they are ideal for use as sliding film or preliner.
  • Tab. 2 lists the measurement results of the additional tear resistance tests.
  • the disadvantageous values are printed in italics in the lines for V1 and V2.
  • the especially disadvantageous values are given in bold italics, whereas the particularly advantageous values for B1 and B2 are printed in bold in the lines for B1 and B2.
  • film V1 is clearly weak in machine direction (md), a clear indication of this film's anisotropy.
  • machine direction (md) the tear force is only 56 N and the tear resistance only 2.2 N/mm 2 .
  • the films B1 and B2 according to the invention with the mixtures of A-PET and LDPE in coating B have a significantly higher (248 and 197 N) and tear resistance (9.8 and 9.9 N/mm 2 ) in machine direction (md) compared to V1 and V2.
  • the tear resistance of films B1 and B2 is higher by a factor of 4 to 5 compared to V1 in machine direction (md) and about twice as high compared to V2.
  • the films according to the invention are ideally suitable for use as sliding film or preliner for introducing tube liners during trenchless sewer pipe renovation.
  • Tab. 3 lists the measurement results of the puncture resistance tests. Once again, for easier orientation, the disadvantageous values are in italics in the lines for V1 and V2, whereas the particularly advantageous values are printed in bold in the lines for B1 and B2.
  • the commercially available film V1 has a maximum puncture force F max of 419.9 N and a penetrating force F p of 209.2 N. These values are rather low for use as sliding film for sewer pipe renovation because the sliding film during the sewer pipe renovation protects the insertion tube to be introduced during sewer renovation from possible edges and corners present along the sewer pipe walls. In the case of the comparative film V1, the sliding film could only offer little protection, as it can be punctured with relatively little exertion of force. Higher values are obtained both in comparative example V2 (where the thickness is 600 ⁇ m) and in example B2 (where the thickness is 500 ⁇ m). These films are considerably more suitable for use as sliding film than the film from V1.
  • Tab. 3 shows especially clearly the favorable influence of a higher quantity of polyethylene on the polyester-based film in example B1. While the film from example B2 contains 2% by weight of PE apart from 98% by weight of A-PET in the middle layer B and a maximum puncturing force of 520.54 N is reached, the addition of 20% by weight of polyethylene apart from 78% by weight of A-PET in middle layer B leads to a clear increase of the puncturing force to 601.22 N. This makes the film from B1 according to the invention not only especially puncture-resistant but sturdy as well (see Tab. 1 & 2).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
US14/061,838 2012-10-25 2013-10-24 Mono- or Multi-Layer Film Abandoned US20140121324A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/679,253 US10040935B2 (en) 2012-10-25 2017-08-17 Multilayered film material formable into lightweight packaging

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012110220 2012-10-25
DE102012110220.1 2012-10-25

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/679,253 Division US10040935B2 (en) 2012-10-25 2017-08-17 Multilayered film material formable into lightweight packaging

Publications (1)

Publication Number Publication Date
US20140121324A1 true US20140121324A1 (en) 2014-05-01

Family

ID=49378156

Family Applications (2)

Application Number Title Priority Date Filing Date
US14/061,838 Abandoned US20140121324A1 (en) 2012-10-25 2013-10-24 Mono- or Multi-Layer Film
US15/679,253 Active US10040935B2 (en) 2012-10-25 2017-08-17 Multilayered film material formable into lightweight packaging

Family Applications After (1)

Application Number Title Priority Date Filing Date
US15/679,253 Active US10040935B2 (en) 2012-10-25 2017-08-17 Multilayered film material formable into lightweight packaging

Country Status (6)

Country Link
US (2) US20140121324A1 (de)
EP (1) EP2727724B1 (de)
DE (1) DE102013111428A1 (de)
DK (1) DK2727724T3 (de)
ES (1) ES2856176T3 (de)
PL (1) PL2727724T3 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107351496A (zh) * 2017-07-17 2017-11-17 安徽国风塑业股份有限公司 一种高阻隔型双向拉伸共挤薄膜及制备方法
US20190113168A1 (en) * 2017-10-17 2019-04-18 Lmk Technologies Llc Method and Apparatus for Repairing a Length of Pipe or a Main/Lateral Pipe Junction
US20190237349A1 (en) * 2016-09-29 2019-08-01 Dai Nippon Printing Co., Ltd. Deposition mask package and deposition mask packaging method
US10822153B2 (en) 2015-03-02 2020-11-03 Societe Des Produits Nestle S.A. Visible light barrier for dairy packaging

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015013270A1 (de) * 2015-10-13 2017-04-13 Impreg Gmbh Einlegeschlauch zum Auskleiden von Rohrleitungen oder Kanälen
DE102017109567A1 (de) * 2017-05-04 2018-11-08 Südpack Verpackungen GmbH & Co. KG Kunststofffolie

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5885481A (en) * 1993-07-16 1999-03-23 Amoco Corporation Efficiency oxygen-scavenging compositions and articles
US6224973B1 (en) * 1999-09-08 2001-05-01 E. I. Du Pont De Nemours And Company Multi-layer sheet suitable as sealable sheet
US20030059591A1 (en) * 2000-04-10 2003-03-27 Tapani Penttinen Multilayer heat-sealable packaging material, a food package made thereof and a method of packaging
US20040146669A1 (en) * 2003-01-24 2004-07-29 Paul-Andre Gollier Peelable overpouch films
US20050287345A1 (en) * 1998-08-06 2005-12-29 Sig Combibloc, Inc. Containers prepared from laminate structures having a foamed polymer layer
US20060257652A1 (en) * 2005-05-10 2006-11-16 Toray Plastics (America), Inc. Tie-layer for polyolefin films
US20060286323A1 (en) * 2004-04-02 2006-12-21 Siegel Dan G Myoglobin blooming agent, films, packages and methods for packaging
US20070259142A1 (en) * 2006-05-03 2007-11-08 Curwood, Inc. Rigid and semirigid packaging articles
US20080063845A1 (en) * 2006-09-12 2008-03-13 Excel-Pac Inc. Multilayer structures, uses and preparation thereof
US20080075901A1 (en) * 2005-02-23 2008-03-27 Lee S Thomas Multilayer Films Including Cycloolefin Copolymer and Styrene-Butadiene Copolymer
US20090263645A1 (en) * 2006-07-14 2009-10-22 Dow Global Technologies Inc. Anisotropic Foam-Film Composite Structures
US20110086141A1 (en) * 2009-10-14 2011-04-14 Erik Strilich Package for Cushioning Food Product
US20120308751A1 (en) * 2009-11-03 2012-12-06 Curwood, Inc. Packaging Sheet With Improved Cutting Properties
US20130183465A1 (en) * 2010-09-30 2013-07-18 Wenbin Liang Polymeric Composition with Sealant Layer with Same

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3944699A (en) * 1972-10-24 1976-03-16 Imperial Chemical Industries Limited Opaque molecularly oriented and heat set linear polyester film and process for making same
ATE11145T1 (de) 1980-07-17 1985-01-15 Imperial Chemical Industries Plc Polyester und polyolefine enthaltende folien.
IN169503B (de) * 1985-03-11 1991-10-26 Goodyear Tire & Rubber
DE10026177A1 (de) 2000-05-26 2001-11-29 Mitsubishi Polyester Film Gmbh Weiße, hochglänzende Polyesterfolie enthaltend Cycloolefincopolymer (COC), Verfahren zu ihrer Herstellung und ihre Verwendung
US20110052867A1 (en) 2007-12-28 2011-03-03 Toray Industries, Inc. Laminated film and packaging material composed of the same
DE102009041841A1 (de) 2008-12-17 2010-07-08 Huhtamaki Forchheim Zweigniederlassung Der Huhtamaki Deutschland Gmbh & Co. Kg UV- und Licht-Schutzfolie
DE102009021714A1 (de) 2009-05-18 2010-11-25 Mitsubishi Polyester Film Gmbh Niedrigsiegelnde Polyesterfolie für unpolare Substrate
WO2011062249A1 (ja) 2009-11-17 2011-05-26 住友化学株式会社 ポリエチレン系樹脂製フィルム

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5885481A (en) * 1993-07-16 1999-03-23 Amoco Corporation Efficiency oxygen-scavenging compositions and articles
US20050287345A1 (en) * 1998-08-06 2005-12-29 Sig Combibloc, Inc. Containers prepared from laminate structures having a foamed polymer layer
US6224973B1 (en) * 1999-09-08 2001-05-01 E. I. Du Pont De Nemours And Company Multi-layer sheet suitable as sealable sheet
US20030059591A1 (en) * 2000-04-10 2003-03-27 Tapani Penttinen Multilayer heat-sealable packaging material, a food package made thereof and a method of packaging
US20040146669A1 (en) * 2003-01-24 2004-07-29 Paul-Andre Gollier Peelable overpouch films
US20060286323A1 (en) * 2004-04-02 2006-12-21 Siegel Dan G Myoglobin blooming agent, films, packages and methods for packaging
US20080075901A1 (en) * 2005-02-23 2008-03-27 Lee S Thomas Multilayer Films Including Cycloolefin Copolymer and Styrene-Butadiene Copolymer
US20060257652A1 (en) * 2005-05-10 2006-11-16 Toray Plastics (America), Inc. Tie-layer for polyolefin films
US20070259142A1 (en) * 2006-05-03 2007-11-08 Curwood, Inc. Rigid and semirigid packaging articles
US20090263645A1 (en) * 2006-07-14 2009-10-22 Dow Global Technologies Inc. Anisotropic Foam-Film Composite Structures
US20080063845A1 (en) * 2006-09-12 2008-03-13 Excel-Pac Inc. Multilayer structures, uses and preparation thereof
US20110086141A1 (en) * 2009-10-14 2011-04-14 Erik Strilich Package for Cushioning Food Product
US20120308751A1 (en) * 2009-11-03 2012-12-06 Curwood, Inc. Packaging Sheet With Improved Cutting Properties
US20130183465A1 (en) * 2010-09-30 2013-07-18 Wenbin Liang Polymeric Composition with Sealant Layer with Same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10822153B2 (en) 2015-03-02 2020-11-03 Societe Des Produits Nestle S.A. Visible light barrier for dairy packaging
US20190237349A1 (en) * 2016-09-29 2019-08-01 Dai Nippon Printing Co., Ltd. Deposition mask package and deposition mask packaging method
US11148397B2 (en) * 2016-09-29 2021-10-19 Dai Nippon Printing Co., Ltd. Deposition mask package and deposition mask packaging method
CN107351496A (zh) * 2017-07-17 2017-11-17 安徽国风塑业股份有限公司 一种高阻隔型双向拉伸共挤薄膜及制备方法
US20190113168A1 (en) * 2017-10-17 2019-04-18 Lmk Technologies Llc Method and Apparatus for Repairing a Length of Pipe or a Main/Lateral Pipe Junction
US10683959B2 (en) * 2017-10-17 2020-06-16 Lmk Technologies, Llc Method and apparatus for repairing a length of pipe or a main/lateral pipe junction

Also Published As

Publication number Publication date
EP2727724B1 (de) 2020-12-02
US20180016434A1 (en) 2018-01-18
EP2727724A1 (de) 2014-05-07
ES2856176T3 (es) 2021-09-27
PL2727724T3 (pl) 2021-06-14
US10040935B2 (en) 2018-08-07
DE102013111428A1 (de) 2014-05-15
DK2727724T3 (da) 2021-03-08

Similar Documents

Publication Publication Date Title
US10040935B2 (en) Multilayered film material formable into lightweight packaging
CA2115254C (en) Multilayer film constructions
US10967615B2 (en) Multilayer barrier film
US6630237B2 (en) Peelably sealed packaging
KR100598888B1 (ko) 자외선 차단성을 갖는 필름
US20150045527A1 (en) Film, especially for use in non-disruptive sewage pipe renovation
EP2877344B1 (de) Mehrschichtstrukturen mit biopolymeren
KR20150106964A (ko) 향상된 다층 블로운 필름
CN108883567B (zh) 生产填充膜带的方法
DK2878440T3 (en) PACKAGING WITH MOVIE COMPOSITION AND MAKING PROCEDURE
EP1361044A2 (de) Papiereinwickler mit Polymilchsäure
CN112672882A (zh) 具有改进的刚度的可回收的pe包装膜
DK2361749T3 (en) PACKAGING WITH DELAMINABLE COVER
WO2015187174A1 (en) Blister packaging components
EP3473433B1 (de) Mehrlagiger klingfilm
US9555932B2 (en) Plastic liner bag with drawstring
BR112019019957B1 (pt) Filmes com recuperação de impacto de retorta
JPH08224837A (ja) フィルム／支持体の複合材料
JP2003305817A (ja) 多層フィルムまたはシート
HU211192B (en) Deep-drawing formable, moulding fixable, multilayer foil containing recycled plastic based on polyamide and polyolefine
US20140030500A1 (en) Microlayer barrier films
US20140295076A1 (en) Low seal initiation lid for rigid substrates
DK2447056T3 (en) Packaging is easy to open
MXPA00005477A (en) Flexible, thermoformable multi-layer film with improved movement in a machine
ITMI20121094A1 (it) Processo per ottenere un laminato multistrato per la realizzazione di contenitori, in particolare per il confezionamento di prodotti alimentari o farmaceutici e relativo laminato

Legal Events

Date Code Title Description
AS Assignment

Owner name: BUERGOFOL GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BOUTRID, ABDEL-KADER;STARK, KURT, DR.;SCHLEICHER, FRANZ, DR.;AND OTHERS;SIGNING DATES FROM 20131118 TO 20140123;REEL/FRAME:032365/0230

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION