[go: up one dir, main page]

WO2018184831A1 - Sealable packaging laminate with nonwoven fabric - Google Patents

Sealable packaging laminate with nonwoven fabric Download PDF

Info

Publication number
WO2018184831A1
WO2018184831A1 PCT/EP2018/057026 EP2018057026W WO2018184831A1 WO 2018184831 A1 WO2018184831 A1 WO 2018184831A1 EP 2018057026 W EP2018057026 W EP 2018057026W WO 2018184831 A1 WO2018184831 A1 WO 2018184831A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
nonwoven fabric
extrusion
coated
packaging laminate
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.)
Ceased
Application number
PCT/EP2018/057026
Other languages
German (de)
French (fr)
Inventor
Achim Grefenstein
Stefan Büttner
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.)
Constantia Pirk GmbH and Co KG
Original Assignee
Constantia Hueck Folien GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Constantia Hueck Folien GmbH and Co KG filed Critical Constantia Hueck Folien GmbH and Co KG
Priority to EP18712206.4A priority Critical patent/EP3606746A1/en
Publication of WO2018184831A1 publication Critical patent/WO2018184831A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/02—Physical, chemical or physicochemical properties
    • 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
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • 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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/03—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers with respect to the orientation of features
    • 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
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/40—Packages formed by enclosing successive articles, or increments of material, in webs, e.g. folded or tubular webs, or by subdividing tubes filled with liquid, semi-liquid, or plastic materials
    • B65D75/44—Individual packages cut from webs or tubes
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/03—3 layers
    • 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
    • B32B2250/00—Layers arrangement
    • B32B2250/04—4 layers
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/10—Coating on the layer surface on synthetic resin layer or on natural or synthetic rubber layer
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • 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
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/514—Oriented
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/582—Tearability
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/16—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating
    • B32B37/20—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with all layers existing as coherent layers before laminating involving the assembly of continuous webs only
    • B32B37/203—One or more of the layers being plastic

Definitions

  • the subject invention relates to a sealable packaging laminate with an extrusion-coated nonwoven fabric layer and a sealing layer.
  • non-wovens made of synthetic fibers are often used as packaging material because they have a pleasant feel and an appealing appearance.
  • nonwovens can be printed with acceptable printing results with acceptable results.
  • a packaging laminate is made of a nonwoven fabric and a plastic layer associated therewith. Such a packaging laminate is e.g. from DE 10 2006 042 058 A1 or DE 10 2004 029 596 A1, in which the nonwoven fabric is bonded to the plastic layer via an adhesive layer.
  • EP 3 025 856 A1 also describes such a packaging laminate of a polypropylene-based nonwoven fabric which is provided with a multilayer plastic film via an adhesive layer.
  • the innermost layer is a sealing layer of a polyolefin.
  • a barrier layer e.g. aluminum or a metallized film.
  • the outer nonwoven fabric can also be printed.
  • nonwoven packaging laminates typically have very high tear resistance and are therefore often used for large packaging where the strength of the packaging laminate is required.
  • the problem with this is that a package made from such a packaging laminate can not easily be torn open by a person due to the high tear resistance, in particular of the nonwoven fabric, but instead can be torn open for most aids, such as e.g. Knife or scissors are required.
  • a problem with such laminated with an adhesive packaging laminates is also to be seen in that the laminating adhesive can penetrate the nonwoven fabric, which can lead to a roll for gluing the individual rolled layers, especially when rolling up the packaging laminate. Therefore, a certain thickness of the nonwoven fabric is required to surely prevent permeation of the laminating adhesive by the nonwoven fabric.
  • a thick nonwoven naturally increases the tear strength, which in turn leads to problems in terms of tearability.
  • EP 1 000 736 A2 describes a packaging laminate in which a polyethylene or polypropylene layer is extrusion-coated onto a non-woven fabric or laminated with an adhesive. From this, a bag package is made with a flap, on the flap an adhesive tape or the like is applied for closing the bag.
  • Non-woven and plastic film laminates are also commonly used in personal care products or clothing. For these applications, the tear resistance is quite desirable and it is more about the provision of an elastic laminate.
  • Such a laminate is known, for example, from EP 2 106 343 B1, in which a layer of an elastomeric polymer has been extruded onto a nonwoven fabric.
  • Elastic laminates are generally unsuitable for packaging applications. Above all, such elastic packaging could be torn even worse due to the inherent elasticity.
  • This object is achieved with a packaging laminate with an extrusion-coated nonwoven layer of a nonwoven fabric made of a polymer having a basis weight between 6 to 30 g / m 2, wherein on one side of the nonwoven fabric an extrusion coating based on a polyolefin with a layer thickness between 2 and 15 g / m 2 is extruded and this extrusion-coated nonwoven fabric layer is bonded with a laminating adhesive layer having a base layer comprising at least one seal layer based on a sealable thermoplastic polymer having a thickness of 10 to 100 ⁇ m, the laminating adhesive layer being provided between the extrusion-coated side of the extrusion-coated nonwoven fabric layer and the base layer.
  • the look and feel of the nonwoven fabric can be obtained and the thickness of the nonwoven fabric despite the lamination can be greatly reduced.
  • the packaging laminate can be easily torn by hand due to the reduced tear strength and material costs can be reduced.
  • the packaging laminate may be made by a process of providing an extrusion-coated nonwoven layer comprised of a nonwoven fabric of a polymer having a basis weight between 6 to 30 g / m 2 and a layer extruded on one side of the nonwoven fabric based on a polyolefin having a layer thickness between 2 and 15g / m2, a base layer comprising at least one sealing layer based on a sealable thermoplastic polymer having a thickness of 10 to 100 ⁇ m, is provided and on one side of the base layer and / or on the extrusion-coated side of the extrusion-coated nonwoven layer is a laminating adhesive is applied and the base layer and the extrusion-coated nonwoven layer are joined together by the laminating adhesive.
  • the properties of the packaging laminate can be influenced in a simple but targeted manner if the sealing layer is multi-layered and / or the base layer another laminate layer between the sealing layer and the Kaschierkleber für summarized.
  • the sealing layer comprises at least one layer of ethylene-vinyl alcohol copolymers
  • an effective barrier layer can be realized.
  • the further laminate layer is preferably a layer based on polyethylene, polypropylene, polyester, polyamide, polylactide, ethylene-vinyl alcohol copolymer, metallized biaxially oriented polypropylene, metallized polyethylene terephthalate, aluminum oxide or silicon oxide coated polyethylene terephthalate or aluminum.
  • the polymer fibers of the nonwoven fabric may be predominantly oriented in one direction and / or elongate bonding points may be provided in the nonwoven fabric.
  • FIG. 2 shows a further embodiment of a packaging laminate according to the invention
  • FIG. 3 shows an exemplary production method of a packaging laminate according to the invention
  • FIG. 4 shows a packaging made of a packaging laminate according to the invention.
  • a packaging laminate 1 according to the invention is shown in FIG. 1 and comprises an extrusion-coated nonwoven fabric layer 6 of a nonwoven fabric 2 provided with an extrusion coating 3, which is bonded to a laminating adhesive layer 5 with a base layer 7.
  • the base layer 7 comprises, for example, a sealing layer 4.
  • the non-extrusion-coated side of the extrusion-coated nonwoven fabric layer 6, which forms an outer layer in the packaging laminate 1, may be printed or not printed.
  • a printing layer 9 in the form of a desired printed image can be applied, for example, in a conventional manner by means of a gravure printing, digital printing or flexographic printing process, or another suitable printing process.
  • nonwoven fabric 2 for the extrusion-coated nonwoven fabric layer 6 may be an arbitrarily produced nonwoven fabric of polymer fibers, based primarily on polypropylene (PP), polyethylene (PE), polyester (such as PET), polyamide (PA) or cellulose, either as a sole component or as a blend or co-extrudate of said substances.
  • the nonwoven fabric 2 is typically a carded nonwoven, spunlaced nonwoven, spunbound nonwoven, or meltblown nonwoven nonwoven fabric. It is also conceivable that the fibers of the nonwoven fabric 2 predominantly in one direction are oriented and / or elongated bonding points are provided in the nonwoven fabric 2, to increase the rupture, if necessary.
  • the nonwoven fabric 2 is used with a basis weight between 6 and 30 g / m 2 . Such a nonwoven fabric 2 is still thin enough to be torn by a person.
  • a material with a tensile strength of> 8N and above is considered no longer rupturable by hand.
  • a breaking strength of ⁇ 8N, preferably ⁇ 5N is sought.
  • the tear strength is measured according to DIN EN ISO 6383-1.
  • the extrusion coating 3 is primarily a polyolefin layer (eg based on PP or PE), which is extruded onto the nonwoven fabric with a layer thickness of 2 to 15 g / m 2 .
  • the sealing layer 4 with a thickness of 10 to 10 ⁇ m, preferably 15 to 70 ⁇ m, consists of a sealable, thermoplastic polymer, for example a polyolefin (eg PP, PE) or polylactide (PLA)
  • the sealing layer 4 may be single-layered or multi-layered
  • the sealing layer 4 could also be metallised (eg with aluminum) or coated with aluminum oxide or silicon oxide on the side facing the nonwoven fabric 2.
  • a metallization or coating mainly fulfills a barrier function, but can also be used for the optical design
  • the sealing layer 4 is multi-layered, for example as a co-extrudate
  • at least one layer of the multi-layered sealing layer 4 preferably serves the barrier function, eg instead of a metallization or coating
  • a suitable barrier also depends on the sealing layer 4 himself off for a stretched film in the Siegelsc
  • a coating is selected.
  • a co-extruded barrier layer will give better results.
  • at least one of the layers of the multilayered sealing layer 4 of ethylene-vinyl alcohol copolymers (EVOH) for the realization of the barrier function.
  • EVOH ethylene-vinyl alcohol copolymers
  • a laminating adhesive layer 5 is provided, via which the two outer layers are joined together to form the packaging laminate 1.
  • any suitable solvent-containing, solvent-free or aqueous laminating adhesive for example based on polyurethane (PU) or polyacrylate, can be used as the laminating adhesive for the laminating adhesive layer 5.
  • the layer thickness of the laminating adhesive layer 5 is 0.5 to 6 g / m 2 , preferably 1 to 2 g / m 2 .
  • the extrusion coating 3 of the extrusion-coated nonwoven fabric layer 6 is arranged facing the sealing layer 4, so that the laminating adhesive is applied between the extrusion coating 3 and the sealing layer 4. This can be prevented that the laminating adhesive in the manufacture of the packaging laminate 1 in the Nonwoven fabric 2 penetrates or penetrates, which makes it possible to reduce the thickness of the nonwoven fabric 2 so far that the packaging laminate 1 can be torn by hand.
  • the thickness of the nonwoven fabric 2 By reducing the thickness of the nonwoven fabric 2, of course, the material costs can be reduced. By reducing the thickness of the nonwoven fabric 2, however, neither the appearance nor the haptics of the packaging laminate 1 are adversely affected.
  • the base layer 7 may comprise, in addition to the (single or multi-layered) sealing layer 4, also a further laminate layer 8, this further laminate layer 8 of the base layer 7 being arranged facing the nonwoven fabric 2, as shown in FIG.
  • the sealing layer 4 in FIG. 2 is a multilayered layer.
  • the laminate layer 8 is for example a layer based on plastic or aluminum with a thickness between 3 and ⁇ , preferably between 6 and 30 ⁇ ".
  • a plastic layer as a laminate layer 8 this may also be metallized (eg with aluminum) or with aluminum oxide or
  • the laminate layer 8 is preferably a plastic layer of PE, PP, polyester, PA, polylactide (PLA), EVOH, metallized biaxially oriented PP (BOPPmet), metallized polyethylene terephthalate (PETmet), alumina or silica coated PET (PETAlOx
  • PDA polylactide
  • BOPPmet metallized biaxially oriented PP
  • PETmet metallized polyethylene terephthalate
  • PETAlOx a variety of additional properties can be integrated into the packaging laminate 1, such as barrier, stiffness, optics (eg by metallization), etc.
  • the laminate layer 8 and the sealing layer 4 can be coextruded to the base layer 7 or be laminated.
  • a concrete produced packaging laminate 1 consisted (from outside to inside) of a nonwoven fabric made of polypropylene with 14g / m 2 basis weight with an extrusion coating 3 of polyethylene with 4g / m 2 basis weight, a laminating adhesive layer 5 based on a polyurethane with an order of 4g / m 2 and a single-layer base layer 7 of a sealing layer 4 made of PE with a thickness of 25 ⁇ m.
  • the application of the laminating adhesive took place on the extrusion-coated nonwoven layer 6.
  • This packaging laminate 1 could simply be torn by hand. 3N measured according to DIN EN ISO 6383-1.
  • Another manufactured packaging laminate 1 consisted (from outside to inside) of a nonwoven made of polypropylene with 14g / m 2 basis weight with an extrusion coating 3 of polyethylene with 4g / m 2 basis weight, a laminating adhesive layer 5 based on a polyurethane with an order of 3.8g / m 2 , a multilayer base layer 7 with a laminate layer 8 of a stretched PP (OPP) with a thickness of 20 ⁇ ", a laminating adhesive based on a polyurethane with a thickness of 2.5g / m 2 and a sealing layer 4 made of PE with The production took place by laminating the extrusion-coated nonwoven fabric layer 6 with the laminate layer 8, with the laminating adhesive being applied to the laminate layer 8.
  • OPP stretched PP
  • an extrusion-coated nonwoven fabric layer 6 and a base layer 7 comprising at least one sealing layer 4 are provided, as shown in FIG.
  • These two layers are laminated together using laminating adhesive.
  • the application of the laminating adhesive can be carried out by any well-known method, for example by spraying (as indicated in Figure 3), rolling, etc., and can be done either on the extrusion coating 3 or on the base layer 7, or even on both , The two layers are then pressed together and connected together.
  • the packaging laminate 1 can be used to produce a package 10, for example a bag, as shown in FIG.
  • the packaging laminate 1 can be folded in a suitable manner, so that the sealing layers 4 come to lie facing each other by the folding, so that it can be heat-sealed at these sealing points 1 1.
  • the package 10 can also be produced on known form filling machines and filled at the same time.
  • the nonwoven fabric 2 is arranged externally, giving the package 10 a pleasant feel and appearance.
  • such a package 10 can be opened by tearing even without tools by hand. For this purpose, no weakening lines or other opening aids are absolutely necessary, but could still be provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to a packaging laminate which is easily tearable and consists of an extrusion-coated nonwoven fabric layer (6) made of a nonwoven fabric (2) of a polymer with a surface weight between 6 to 30 g/m2, wherein an extrusion coating (3) based on a polyolefin with a thickness between 2 and 15 g/m2 is extruded onto a side of the nonwoven fabric (2), and the extrusion-coated nonwoven fabric layer (6) is connected to a laminating adhesive layer (5) with a base layer (7) which comprises at least one sealing layer (4) based on a sealable thermoplastic polymer with a thickness of 10 to 100 µm, wherein the laminating adhesive layer (5) is provided between the extrusion-coated side of the extrusion-coated nonwoven fabric layer (6) and the base layer (7).

Description

Siegelfähiges Verpackungslaminat mit Vliesstoff  Sealable packaging laminate with nonwoven fabric

Die gegenständliche Erfindung betrifft ein siegelfähiges Verpackungslaminat mit einer extru- sionsbeschichteten Vliesstoffschicht und einer Siegelschicht.  The subject invention relates to a sealable packaging laminate with an extrusion-coated nonwoven fabric layer and a sealing layer.

In der Verpackungsindustrie werden oftmals Vliesstoffe (non-woven) aus Kunststofffasern als Verpackungsmaterial eingesetzt, weil diese eine angenehme Haptik und eine ansprechende Optik aufweisen. Zusätzlich können Vliesstoffe mit gängigen Druckverfahren auch mit akzeptablen Ergebnissen bedruckt werden. Zur Verwendung für eine Verpackung wird ein Verpackungslaminat aus einem Vliesstoff und einer damit verbundenen Kunststoffschicht hergestellt. Ein solches Verpackungslaminat geht z.B. aus der DE 10 2006 042 058 A1 oder der DE 10 2004 029 596 A1 hervor, bei denen der Vliesstoff über eine Kleberschicht mit der Kunststoffschicht verbunden ist.  In the packaging industry, non-wovens made of synthetic fibers are often used as packaging material because they have a pleasant feel and an appealing appearance. In addition, nonwovens can be printed with acceptable printing results with acceptable results. For use in packaging, a packaging laminate is made of a nonwoven fabric and a plastic layer associated therewith. Such a packaging laminate is e.g. from DE 10 2006 042 058 A1 or DE 10 2004 029 596 A1, in which the nonwoven fabric is bonded to the plastic layer via an adhesive layer.

Auch die EP 3 025 856 A1 beschreibt ein solches Verpackungslaminat aus einem Polypropylen basierten Vliesstoff, der über eine Kleberschicht mit einer mehrlagigen Kunststofffilm versehen ist. Die innerste Schicht ist dabei eine Siegelschicht aus einem Polyolefin. Im mehrla- gigen Kunststofffilm kann auch eine Barriereschicht, z.B. aus Aluminium oder eine metallisierten Folie, enthalten sein. Der äußere Vliesstoff kann dabei auch bedruckt sein.  EP 3 025 856 A1 also describes such a packaging laminate of a polypropylene-based nonwoven fabric which is provided with a multilayer plastic film via an adhesive layer. The innermost layer is a sealing layer of a polyolefin. In the multilayer plastic film, a barrier layer, e.g. aluminum or a metallized film. The outer nonwoven fabric can also be printed.

Solche Verpackungslaminate mit einem Vliesstoff weisen in der Regel eine sehr hohe Reißfestigkeit auf und werden daher oftmals für Großverpackungen eingesetzt, wo die Festigkeit des Verpackungslaminats benötigt wird. Das Problem dabei ist, dass eine Verpackung aus einem solchen Verpackungslaminat aufgrund der hohen Reißfestigkeit, insbesondere des Vliesstoffes, von einer Person nicht einfach aufgerissen werden kann, sondern dafür meisten Hilfsmittel, wie z.B. Messer oder Scheren, erforderlich sind.  Such nonwoven packaging laminates typically have very high tear resistance and are therefore often used for large packaging where the strength of the packaging laminate is required. The problem with this is that a package made from such a packaging laminate can not easily be torn open by a person due to the high tear resistance, in particular of the nonwoven fabric, but instead can be torn open for most aids, such as e.g. Knife or scissors are required.

Ein Problem bei derartigen mit einem Kleber kaschierten Verpackungslaminaten ist auch darin zu sehen, dass der Kaschierkleber den Vliesstoff durchdringen kann, was vor allem bei Aufrollen des Verpackungslaminats auf einer Rolle zum Verkleben der einzelnen gerollten Lagen führen kann. Es ist daher eine gewisse Dicke des Vliesstoffes erforderlich, um ein Durchdringen des Kaschierklebers durch den Vliesstoff sicher zu verhindern. Allerdings erhöht ein dicker Vliesstoff natürlich die Reißfestigkeit, was wiederum hinsichtlich der Aufreiß- barkeit zu Problemen führt.  A problem with such laminated with an adhesive packaging laminates is also to be seen in that the laminating adhesive can penetrate the nonwoven fabric, which can lead to a roll for gluing the individual rolled layers, especially when rolling up the packaging laminate. Therefore, a certain thickness of the nonwoven fabric is required to surely prevent permeation of the laminating adhesive by the nonwoven fabric. However, a thick nonwoven naturally increases the tear strength, which in turn leads to problems in terms of tearability.

Die EP 1 000 736 A2 beschreibt ein Verpackungslaminat, bei dem eine Polyethylen- oder Polypropylenschicht auf einen Vliesstoff extrusionsbeschichtet oder mit einem Kleber kaschiert wird. Daraus wird eine Beutelverpackung mit einer Klappe gefertigt, wobei auf der Klappe ein Klebeband oder ähnliches zum Verschließen des Beutels aufgebracht ist. Hier wird das Problem der schlechten Öffenbarkeit durch das Vorsehen einer offenbaren Klappe umgangen. Laminate aus einem Vliesstoff und einem Kunststofffilm werden häufig auch in Hygieneprodukten oder für Bekleidung verwendet. Für diese Anwendungen ist die Reißfestigkeit durchaus erwünscht und es geht mehr um die Bereitstellung eines elastischen Laminats. Ein solches Laminat ist beispielsweise aus der EP 2 106 343 B1 bekannt, bei dem eine Schicht aus einem elastomeren Polymer auf einem Vliesstoff aufextrudiert wurde. Elastische Laminate sind für Verpackungsanwendungen in der Regel ungeeignet. Vor allem ließen sich solche elastischen Verpackungen aufgrund der innewohnenden Elastizität noch schlechter aufreißen. EP 1 000 736 A2 describes a packaging laminate in which a polyethylene or polypropylene layer is extrusion-coated onto a non-woven fabric or laminated with an adhesive. From this, a bag package is made with a flap, on the flap an adhesive tape or the like is applied for closing the bag. Here the problem of poor openability is circumvented by the provision of an obvious door. Non-woven and plastic film laminates are also commonly used in personal care products or clothing. For these applications, the tear resistance is quite desirable and it is more about the provision of an elastic laminate. Such a laminate is known, for example, from EP 2 106 343 B1, in which a layer of an elastomeric polymer has been extruded onto a nonwoven fabric. Elastic laminates are generally unsuitable for packaging applications. Above all, such elastic packaging could be torn even worse due to the inherent elasticity.

Es ist eine Aufgabe der gegenständlichen Erfindung, ein Verpackungslaminat aus einem Vliesstoff und einer damit verbundenen Siegelschicht aus Kunststoff anzugeben, die bei Verwendung in einer Verpackung einfach aufgerissen werden kann.  It is an object of the subject invention to provide a packaging laminate of a nonwoven fabric and an associated sealing layer of plastic, which can be easily torn when used in a package.

Diese Aufgabe wird gelöst mit einem Verpackungslaminat mit einer extrusionsbeschichteten Vliesstoffschicht aus einem Vliesstoff aus einem Polymer mit einem Flächengewicht zwischen 6 bis 30g/m2, wobei auf einer Seite des Vliesstoffes eine Extrusionsbeschichtung auf Basis eines Polyolefins mit einer Schichtdicke zwischen 2 und 15g/m2 aufextrudiert ist und diese extrusionsbeschichtete Vliesstoffschicht mit einer Kaschierkleberschicht mit einer Basisschicht, die zumindest eine Siegelschicht auf Basis eines siegelfähigen, thermoplastischen Polymers mit einer Dicke von 10 bis 100μηι umfasst, verbunden ist, wobei die Kaschierkleberschicht zwischen der extrusionsbeschichteten Seite der extrusionsbeschichteten Vliesstoffschicht und der Basisschicht vorgesehen ist. Bei dieser Ausführung kann die Optik und Haptik des Vliesstoffes erhalten werden und die Dicke des Vliesstoffes trotz der Kaschierung sehr weit reduziert werden. Das Verpackungslaminat kann durch die reduzierte Reißfestigkeit einfach von Hand gerissen werden und es können Materialkosten reduziert werden.  This object is achieved with a packaging laminate with an extrusion-coated nonwoven layer of a nonwoven fabric made of a polymer having a basis weight between 6 to 30 g / m 2, wherein on one side of the nonwoven fabric an extrusion coating based on a polyolefin with a layer thickness between 2 and 15 g / m 2 is extruded and this extrusion-coated nonwoven fabric layer is bonded with a laminating adhesive layer having a base layer comprising at least one seal layer based on a sealable thermoplastic polymer having a thickness of 10 to 100 μm, the laminating adhesive layer being provided between the extrusion-coated side of the extrusion-coated nonwoven fabric layer and the base layer. In this embodiment, the look and feel of the nonwoven fabric can be obtained and the thickness of the nonwoven fabric despite the lamination can be greatly reduced. The packaging laminate can be easily torn by hand due to the reduced tear strength and material costs can be reduced.

Das Verpackungslaminat kann durch ein Verfahren hergestellt werden, bei dem eine extrusionsbeschichtete Vliesstoffschicht bereitgestellt wird, die aus einem Vliesstoff aus einem Polymer mit einem Flächengewicht zwischen 6 bis 30g/m2 und einer auf einer Seite des Vliesstoffes aufextrudierten Schicht auf Basis eines Polyolefins mit einer Schichtdicke zwischen 2 und 15g/m2 besteht, eine Basisschicht, die zumindest eine Siegelschicht auf Basis eines siegelfähigen, thermoplastischen Polymers mit einer Dicke von 10 bis 100μηι umfasst, bereitgestellt wird und auf eine Seite der Basisschicht und/oder auf die extrusionsbeschichtete Seite der extrusionsbeschichteten Vliesstoffschicht ein Kaschierkleber aufgetragen wird und die Basisschicht und die extrusionsbeschichtete Vliesstoffschicht durch den Kaschierkleber miteinander verbunden werden. The packaging laminate may be made by a process of providing an extrusion-coated nonwoven layer comprised of a nonwoven fabric of a polymer having a basis weight between 6 to 30 g / m 2 and a layer extruded on one side of the nonwoven fabric based on a polyolefin having a layer thickness between 2 and 15g / m2, a base layer comprising at least one sealing layer based on a sealable thermoplastic polymer having a thickness of 10 to 100 μm, is provided and on one side of the base layer and / or on the extrusion-coated side of the extrusion-coated nonwoven layer is a laminating adhesive is applied and the base layer and the extrusion-coated nonwoven layer are joined together by the laminating adhesive.

Die Eigenschaften des Verpackungslaminats können auf einfache aber gezielte Weise be- einflusst werden, wenn die Siegelschicht mehrlagig ausgeführt ist und/oder die Basisschicht eine weitere Laminatschicht zwischen der Siegelschicht und der Kaschierkleberschicht um- fasst. The properties of the packaging laminate can be influenced in a simple but targeted manner if the sealing layer is multi-layered and / or the base layer another laminate layer between the sealing layer and the Kaschierkleberschicht summarized.

Wenn die Siegelschicht zumindest eine Lage aus Ethylen-Vinylalkohol-Coplymeren umfasst, kann eine wirkungsvolle Barrierschicht realisiert werden. Die weitere Laminatschicht ist vor- zugsweise eine Schicht auf Basis von Polyethlyen, Polypropylen, Polyester, Polyamid, Po- lylactid, Ethylen-Vinylalkohol-Coplymer, metallisiertem biaxial gerecktem Polypropylen, metallisiertem Polyethylenterephthalat, mit Aluminiumoxid oder Siliziumoxid beschichtetem Po- lyethylenterephthalat oder Aluminium.  If the sealing layer comprises at least one layer of ethylene-vinyl alcohol copolymers, an effective barrier layer can be realized. The further laminate layer is preferably a layer based on polyethylene, polypropylene, polyester, polyamide, polylactide, ethylene-vinyl alcohol copolymer, metallized biaxially oriented polypropylene, metallized polyethylene terephthalate, aluminum oxide or silicon oxide coated polyethylene terephthalate or aluminum.

Um die Reißfähigkeit zusätzlich zu der angestrebten geringen Dicke des Vliesstoffes gege- benenfalls zu erhöhen, was in einer Verpackung unter Umständen notwendig sein kann, können die Polymerfasern des Vliesstoffes überwiegend in eine Richtung orientiert sein und/oder können im Vliesstoff längliche Bondierpunkte vorgesehen sein.  In order to increase the tear strength in addition to the desired small thickness of the nonwoven fabric, which may possibly be necessary in a package, the polymer fibers of the nonwoven fabric may be predominantly oriented in one direction and / or elongate bonding points may be provided in the nonwoven fabric.

Die gegenständliche Erfindung wird nachfolgend unter Bezugnahme auf die Figuren 1 bis 4 näher erläutert, die beispielhaft, schematisch und nicht einschränkend vorteilhafte Ausgestal- tungen der Erfindung zeigen. Dabei zeigt  The subject invention will be explained in more detail below with reference to Figures 1 to 4, which show by way of example, schematically and not by way of limitation advantageous embodiments of the invention. It shows

Fig.1 ein erfindungsgemäßes Verpackungslaminat,  1 shows a packaging laminate according to the invention,

Fig.2 eine weitere erfindungsgemäße Ausgestaltung eines Verpackungslaminats, Fig.3 ein beispielhaftes Herstellverfahren eines erfindungsgemäßen Verpackungslaminats und  2 shows a further embodiment of a packaging laminate according to the invention, FIG. 3 shows an exemplary production method of a packaging laminate according to the invention and FIG

Fig.4 eine Verpackung aus einem erfindungsgemäßen Verpackungslaminat.  4 shows a packaging made of a packaging laminate according to the invention.

Ein erfindungsgemäßes Verpackungslaminat 1 ist in Fig.1 dargestellt und umfasst eine extrusionsbeschichtete Vliesstoffschicht 6 aus einem mit einer Extrusionsbeschichtung 3 versehenen Vliesstoff 2, die mit einer Kaschierkleberschicht 5 mit einer Basisschicht 7 verbunden ist. Die Basisschicht 7 umfasst beispielsweise eine Siegelschicht 4. Die nicht extru- sionsbeschichtete Seite der extrusionsbeschichteten Vliesstoffschicht 6, die im Verpackungslaminat 1 eine äußere Schicht ausbildet, kann bedruckt oder nicht bedruckt sein. Eine Druckschicht 9 in Form eines gewünschten Druckbildes kann beispielsweise in gängiger Weise mit einem Tiefdruck-, Digitaldruck- oder Flexodruckverfahren, oder einem anderen geeigneten Druckverfahren, aufgebracht werden.  A packaging laminate 1 according to the invention is shown in FIG. 1 and comprises an extrusion-coated nonwoven fabric layer 6 of a nonwoven fabric 2 provided with an extrusion coating 3, which is bonded to a laminating adhesive layer 5 with a base layer 7. The base layer 7 comprises, for example, a sealing layer 4. The non-extrusion-coated side of the extrusion-coated nonwoven fabric layer 6, which forms an outer layer in the packaging laminate 1, may be printed or not printed. A printing layer 9 in the form of a desired printed image can be applied, for example, in a conventional manner by means of a gravure printing, digital printing or flexographic printing process, or another suitable printing process.

Als Vliesstoff 2 für die extrusionsbeschichtete Vliesstoffschicht 6 kann ein beliebig hergestellter Vliesstoff aus Polymerfasern sein, vorrangig auf Basis von Polypropylen (PP), Polyethylen (PE), Polyester (wie z.B. PET), Polyamid (PA) oder Cellulose, entweder als alleiniger Bestandteil oder als Abmischung oder Co-Extrudat der genannten Stoffe. Der Vliesstoff 2 ist typischerweise ein kardierter (carded non-woven), wasserstrahlverfestigter (spunlaced non- woven), spinnverfestigter (spunbound non-woven) oder schmelzgeblasener (meltblown non- woven) Vliesstoff. Ebenso ist es denkbar, dass die Fasern des Vliesstoffes 2 überwiegend in eine Richtung orientiert sind und/oder im Vliesstoff 2 längliche Bondierpunkte vorgesehen sind, um die Reißfähigkeit gegebenenfalls zu erhöhen. Der Vliesstoff 2 wird mit einem Flächengewicht zwischen 6 und 30g/m2 eingesetzt. Ein solcher Vliesstoff 2 ist noch dünn genug, um von einer Person gerissen werden zu können. As the nonwoven fabric 2 for the extrusion-coated nonwoven fabric layer 6 may be an arbitrarily produced nonwoven fabric of polymer fibers, based primarily on polypropylene (PP), polyethylene (PE), polyester (such as PET), polyamide (PA) or cellulose, either as a sole component or as a blend or co-extrudate of said substances. The nonwoven fabric 2 is typically a carded nonwoven, spunlaced nonwoven, spunbound nonwoven, or meltblown nonwoven nonwoven fabric. It is also conceivable that the fibers of the nonwoven fabric 2 predominantly in one direction are oriented and / or elongated bonding points are provided in the nonwoven fabric 2, to increase the rupture, if necessary. The nonwoven fabric 2 is used with a basis weight between 6 and 30 g / m 2 . Such a nonwoven fabric 2 is still thin enough to be torn by a person.

Aus Erfahrungswerten wird ein Material ab einer Reißfähigkeit von >8N als nicht mehr von Hand reißfähig angesehen. Für das gegenständliche erfindungsgemäße Verpackungslaminat 1 wird daher eine Reißfähigkeit von <8N, vorzugsweise <5N, angestrebt. Die Reißfähigkeit wird dabei nach DIN EN ISO 6383-1 gemessen. Based on empirical values, a material with a tensile strength of> 8N and above is considered no longer rupturable by hand. For the subject packaging laminate 1 according to the invention therefore a breaking strength of <8N, preferably <5N, is sought. The tear strength is measured according to DIN EN ISO 6383-1.

Die Extrusionsbeschichtung 3 ist vorrangig eine Polyolefinschicht (z.B. auf Basis von PP oder PE), die auf den Vliesstoff mit einer Schichtdicke von 2 bis 15g/m2 aufextrudiert ist.The extrusion coating 3 is primarily a polyolefin layer (eg based on PP or PE), which is extruded onto the nonwoven fabric with a layer thickness of 2 to 15 g / m 2 .

Die Siegelschicht 4 mit einer Dicke von 10 bis Ι ΟΟμηη, vorzugsweise 15 bis 70μη"ΐ, besteht aus einem siegelfähigen, thermoplastischen Polymer, beispielsweise einem Polyolefin (z.B. PP, PE) oder Polylactid (PLA). Die Siegelschicht 4 kann einlagig oder auch mehrlagig ausgeführt sein. Die Siegelschicht 4 könnte auf der dem Vliesstoff 2 zugewandten Seite auch me- tallisiert sein (z.B. mit Aluminium) oder mit Aluminiumoxid oder Siliziumoxid beschichtet sein. Eine Metallisierung oder eine derartige Beschichtung erfüllt hauptsächlich eine Barrierefunktion, kann aber auch für die optische Gestaltung genutzt werden. Wenn die Siegelschicht 4 mehrlagig ausgeführt ist, beispielsweise als Co-Extrudat, dann dient zumindest eine Schicht der mehrlagigen Siegelschicht 4 vorzugsweise der Barrierefunktion, z.B. anstelle einer Metal- lisierung oder Beschichtung. Die Wahl einer geeigneten Barriere hängt dabei auch von der Siegelschicht 4 selbst ab. Für eine gereckte Folie in der Siegelschicht 4 wird vorzugsweise eine Beschichtung gewählt. Im Falle einer nicht-gereckten Folie wird man mit einer co- extrudierten Barriere-Schicht die besseren Resultate erzielen. In diesem Fall besteht vorzugsweise zumindest eine der Schichten der mehrlagigen Siegelschicht 4 aus Ethylen- Vinylalkohol-Copolymeren (EVOH) zur Realisierung der Barrierefunktion. The sealing layer 4 with a thickness of 10 to 10 μm, preferably 15 to 70 μm, consists of a sealable, thermoplastic polymer, for example a polyolefin (eg PP, PE) or polylactide (PLA) The sealing layer 4 may be single-layered or multi-layered The sealing layer 4 could also be metallised (eg with aluminum) or coated with aluminum oxide or silicon oxide on the side facing the nonwoven fabric 2. A metallization or coating mainly fulfills a barrier function, but can also be used for the optical design If the sealing layer 4 is multi-layered, for example as a co-extrudate, then at least one layer of the multi-layered sealing layer 4 preferably serves the barrier function, eg instead of a metallization or coating The choice of a suitable barrier also depends on the sealing layer 4 himself off for a stretched film in the Siegelsc Preferably, a coating is selected. In the case of a non-stretched film, a co-extruded barrier layer will give better results. In this case, preferably at least one of the layers of the multilayered sealing layer 4 of ethylene-vinyl alcohol copolymers (EVOH) for the realization of the barrier function.

Zwischen der extrusionsbeschichteten Vliesstoffschicht 6 und der Siegelschicht 4 ist eine Kaschierkleberschicht 5 vorgesehen, über die die beiden äußeren Schichten miteinander zum Verpackungslaminat 1 verbunden werden. Als Kaschierkleber für die Kaschierkleberschicht 5 kann grundsätzlich jeder geeignete lösemittelhaltige, lösemittelfreie oder wässrige Kaschierkleber, beispielsweise auf Basis von Polyurethan (PU) oder Polyacrylat, verwendet werden. Die Schichtdicke der Kaschierkleberschicht 5 beträgt 0,5 bis 6g/m2, vorzugsweise 1 bis 2g/m2. Between the extrusion-coated nonwoven fabric layer 6 and the sealing layer 4, a laminating adhesive layer 5 is provided, via which the two outer layers are joined together to form the packaging laminate 1. In principle, any suitable solvent-containing, solvent-free or aqueous laminating adhesive, for example based on polyurethane (PU) or polyacrylate, can be used as the laminating adhesive for the laminating adhesive layer 5. The layer thickness of the laminating adhesive layer 5 is 0.5 to 6 g / m 2 , preferably 1 to 2 g / m 2 .

Entscheidend ist, dass die Extrusionsbeschichtung 3 der extrusionsbeschichteten Vliesstoffschicht 6 der Siegelschicht 4 zugewandt angeordnet ist, sodass der Kaschierkleber zwischen der Extrusionsbeschichtung 3 und der Siegelschicht 4 aufgebracht ist. Damit kann verhindert werden, dass der Kaschierkleber bei der Fertigung des Verpackungslaminats 1 in den Vliesstoff 2 eindringt bzw. diesen durchdringt, was es ermöglicht, die Dicke des Vliesstoffes 2 soweit zu reduzieren, dass das Verpackungslaminat 1 von Hand gerissen werden kann. Durch die Reduzierung der Dicke des Vliesstoffes 2 können natürlich auch die Materialkosten reduziert werden. Durch die Reduzierung der Dicke des Vliesstoffes 2 werden aber we- der die Optik noch die Haptik des Verpackungslaminats 1 negativ beeinflusst. It is crucial that the extrusion coating 3 of the extrusion-coated nonwoven fabric layer 6 is arranged facing the sealing layer 4, so that the laminating adhesive is applied between the extrusion coating 3 and the sealing layer 4. This can be prevented that the laminating adhesive in the manufacture of the packaging laminate 1 in the Nonwoven fabric 2 penetrates or penetrates, which makes it possible to reduce the thickness of the nonwoven fabric 2 so far that the packaging laminate 1 can be torn by hand. By reducing the thickness of the nonwoven fabric 2, of course, the material costs can be reduced. By reducing the thickness of the nonwoven fabric 2, however, neither the appearance nor the haptics of the packaging laminate 1 are adversely affected.

Die Basisschicht 7 kann neben der (ein- oder mehrlagigen) Siegelschicht 4 auch noch eine weitere Laminatschicht 8 umfassen, wobei diese weitere Laminatschicht 8 der Basisschicht 7 dem Vliesstoff 2 zugewandt angeordnet ist, wie in Fig.2 dargestellt. In Fig.2 ist die Siegelschicht 4 darüber hinaus eine mehrlagige Schicht. Die Laminatschicht 8 ist beispielsweise eine Schicht auf Basis von Kunststoff oder Aluminium mit einer Dicke zwischen 3 und δθμηη, vorzugsweise zwischen 6 und 30μη"ΐ. Im Falle einer Kunststoffschicht als Laminatschicht 8 kann diese auch metallisiert sein (z.B. mit Aluminium) oder mit Aluminiumoxid oder Siliziumoxid beschichtet ausgeführt sein. Die Laminatschicht 8 ist vorzugsweise eine Kunststoffschicht aus PE, PP, Polyester, PA, Polylactid (PLA), EVOH, metallisiertem biaxial gerecktem PP (BOPPmet), metallisiertem Polyethylenterephthalat (PETmet), mit Aluminiumoxid oder Siliziumoxid beschichtetem PET (PETAlOx bzw. PETSiOx). Mit einer zusätzlichen Laminatschicht 8 können verschiedenste zusätzliche Eigenschaften in das Verpackungslaminat 1 integriert werden, wie beispielsweise Barriere, Steifigkeit, Optik (bspw. durch Metallisierung), usw. Die Laminatschicht 8 und die Siegelschicht 4 können zur Basisschicht 7 coextrudiert oder kaschiert werden.  The base layer 7 may comprise, in addition to the (single or multi-layered) sealing layer 4, also a further laminate layer 8, this further laminate layer 8 of the base layer 7 being arranged facing the nonwoven fabric 2, as shown in FIG. In addition, the sealing layer 4 in FIG. 2 is a multilayered layer. The laminate layer 8 is for example a layer based on plastic or aluminum with a thickness between 3 and δθμηη, preferably between 6 and 30μη ". In the case of a plastic layer as a laminate layer 8, this may also be metallized (eg with aluminum) or with aluminum oxide or The laminate layer 8 is preferably a plastic layer of PE, PP, polyester, PA, polylactide (PLA), EVOH, metallized biaxially oriented PP (BOPPmet), metallized polyethylene terephthalate (PETmet), alumina or silica coated PET (PETAlOx With an additional laminate layer 8 a variety of additional properties can be integrated into the packaging laminate 1, such as barrier, stiffness, optics (eg by metallization), etc. The laminate layer 8 and the sealing layer 4 can be coextruded to the base layer 7 or be laminated.

Ein konkret hergestelltes Verpackungslaminat 1 bestand (von außen nach innen) aus einem Vliesstoff aus Polypropylen mit 14g/m2 Flächengewicht mit einer Extrusionsbeschichtung 3 aus Polyethylen mit 4g/m2 Flächengewicht, einer Kaschierkleberschicht 5 auf Basis eines Polyurethans mit einem Auftrag von 4g/m2 und einer einlagigen Basisschicht 7 aus einer Siegelschicht 4 aus PE mit einer Dicke von 25μη"ΐ. Der Auftrag des Kaschierklebers erfolgte auf den extrusionsbeschichteten Vliesstoffschicht 6. Dieses Verpackungslaminat 1 konnte einfach von Hand gerissen werden. Die Reißfestigkeit bei dieser Ausführung lag bei 2,3N gemessen nach DIN EN ISO 6383-1. A concrete produced packaging laminate 1 consisted (from outside to inside) of a nonwoven fabric made of polypropylene with 14g / m 2 basis weight with an extrusion coating 3 of polyethylene with 4g / m 2 basis weight, a laminating adhesive layer 5 based on a polyurethane with an order of 4g / m 2 and a single-layer base layer 7 of a sealing layer 4 made of PE with a thickness of 25 μm. The application of the laminating adhesive took place on the extrusion-coated nonwoven layer 6. This packaging laminate 1 could simply be torn by hand. 3N measured according to DIN EN ISO 6383-1.

Ein anderes hergestelltes Verpackungslaminat 1 bestand (von außen nach innen) aus einem Vliesstoff aus Polypropylen mit 14g/m2 Flächengewicht mit einer Extrusionsbeschichtung 3 aus Polyethylen mit 4g/m2 Flächengewicht, einer Kaschierkleberschicht 5 auf Basis eines Polyurethans mit einem Auftrag von 3,8g/m2, einer mehrlagigen Basisschicht 7 mit einer Laminatschicht 8 aus einem gereckten PP (OPP) mit einer Dicke von 20μη"ΐ, einem Kaschierkleber auf Basis eines Polyurethans mit einer Dicke von 2,5g/m2 und einer Siegelschicht 4 aus PE mit einer Dicke von δθμηη. Die Herstellung erfolgte durch Kaschieren der extrusionsbeschichteten Vliesstoffschicht 6 mit der Laminatschicht 8, wobei der Kaschierkleber auf der Laminatschicht 8 aufgetragen wurde. Danach wurde dieser Verbund an der Seite des Vliesstoffes 2 bedruckt und dann die Siegelschicht 4 aufkaschiert, wobei der Auftrag des Kaschierklebers auch hierbei auf der Laminatschicht 8 erfolgte. Dieses Verpackungslaminat 1 konnte einfach von Hand gerissen werden. Die Reißfähigkeit bei dieser Ausführung lag bei 2,4N gemessen nach DIN EN ISO 6383-1 . Another manufactured packaging laminate 1 consisted (from outside to inside) of a nonwoven made of polypropylene with 14g / m 2 basis weight with an extrusion coating 3 of polyethylene with 4g / m 2 basis weight, a laminating adhesive layer 5 based on a polyurethane with an order of 3.8g / m 2 , a multilayer base layer 7 with a laminate layer 8 of a stretched PP (OPP) with a thickness of 20μη ", a laminating adhesive based on a polyurethane with a thickness of 2.5g / m 2 and a sealing layer 4 made of PE with The production took place by laminating the extrusion-coated nonwoven fabric layer 6 with the laminate layer 8, with the laminating adhesive being applied to the laminate layer 8. Thereafter, this composite was attached to the side of the laminate layer 8 Nonwoven fabric 2 printed and then laminated on the sealing layer 4, wherein the order of the laminating adhesive in this case also took place on the laminate layer 8. This packaging laminate 1 could easily be torn by hand. The tear strength in this embodiment was 2.4N measured according to DIN EN ISO 6383-1.

Zur Herstellung des Verpackungslaminats 1 wird eine extrusionsbeschichtete Vliesstoffschicht 6 und eine Basisschicht 7, die zumindest eine Siegelschicht 4 umfasst, bereitgestellt, wie in Fig.3 dargestellt. Diese beiden Schichten werden mittels Kaschierkleber miteinander kaschiert. Der Auftrag des Kaschierklebers kann mit einem beliebigen, hinlänglich bekannten Verfahren erfolgen, beispielsweise durch Sprühen (wie in Fig.3 angedeutet), Walzen, usw., und kann entweder auf der Extrusionsbeschichtung 3 oder auf der Basisschicht 7, oder auch auf beiden, erfolgen. Die beiden Schichten werden dann aneinandergedrückt und miteinander verbunden. For producing the packaging laminate 1, an extrusion-coated nonwoven fabric layer 6 and a base layer 7 comprising at least one sealing layer 4 are provided, as shown in FIG. These two layers are laminated together using laminating adhesive. The application of the laminating adhesive can be carried out by any well-known method, for example by spraying (as indicated in Figure 3), rolling, etc., and can be done either on the extrusion coating 3 or on the base layer 7, or even on both , The two layers are then pressed together and connected together.

Das Verpackungslaminat 1 kann zur Herstellung einer Verpackung 10, beispielsweise ein Beutel, wie in Fig.4 dargestellt, dienen. Dazu kann das Verpackungslaminat 1 in geeigneter Weise gefaltet werden, sodass die Siegelschichten 4 durch das Falten einander zugewandt zu liegen kommen, sodass an diesen Siegelstellen 1 1 heißgesiegelt werden kann. Natürlich sind auch andere Verpackungsformen denkbar. Die Verpackung 10 kann natürlich auch auf bekannten Formfüllmaschinen hergestellt und gleichzeitig gefüllt werden. In der Verpackung 10 ist der Vliesstoff 2 außenliegend angeordnet, was der Verpackung 10 eine angenehme Haptik und Optik gibt. Gleichzeitig kann eine solche Verpackung 10 auch ohne Hilfsmittel von Hand durch Aufreißen geöffnet werden. Hierzu sind auch keine Schwächungslinien oder andere Öffnungshilfen unbedingt notwendig, könnten aber trotzdem vorgesehen sein.  The packaging laminate 1 can be used to produce a package 10, for example a bag, as shown in FIG. For this purpose, the packaging laminate 1 can be folded in a suitable manner, so that the sealing layers 4 come to lie facing each other by the folding, so that it can be heat-sealed at these sealing points 1 1. Of course, other forms of packaging are conceivable. Of course, the package 10 can also be produced on known form filling machines and filled at the same time. In the package 10, the nonwoven fabric 2 is arranged externally, giving the package 10 a pleasant feel and appearance. At the same time, such a package 10 can be opened by tearing even without tools by hand. For this purpose, no weakening lines or other opening aids are absolutely necessary, but could still be provided.

Claims

Patentansprüche claims 1 . Siegelfähiges Verpackungslaminat mit einer extrusionsbeschichteten Vliesstoffschicht (6) aus einem Vliesstoff (2) aus einem Polymer mit einem Flächengewicht zwischen 6 bis 30g/m2, wobei auf einer Seite des Vliesstoffes (2) eine Extrusionsbeschichtung (3) auf Basis eines Polyolefins mit einer Schichtdicke zwischen 2 und 15g/m2 aufextrudiert ist und diese extrusionsbeschichtete Vliesstoffschicht (6) mit einer Kaschierkleberschicht (5) mit einer Basisschicht (7), die zumindest eine Siegelschicht (4) auf Basis eines siegelfähigen, thermoplastischen Polymers mit einer Dicke von 10 bis Ι ΟΟμηη umfasst, verbunden ist, wobei die Kaschierkleberschicht (5) zwischen der extrusionsbeschichteten Seite der extrusionsbeschichteten Vliesstoffschicht (6) und der Basisschicht (7) vorgesehen ist. 1 . Sealable packaging laminate with an extrusion-coated nonwoven fabric layer (6) of a nonwoven fabric (2) of a polymer having a basis weight between 6 to 30 g / m 2 , wherein on one side of the nonwoven fabric (2) an extrusion coating (3) based on a polyolefin with a layer thickness between 2 and 15 g / m 2 and this extrusion-coated nonwoven fabric layer (6) having a laminating adhesive layer (5) with a base layer (7) comprising at least one sealing layer (4) based on a sealable, thermoplastic polymer with a thickness of 10 to Ι Kμηη, wherein the laminating adhesive layer (5) is provided between the extrusion-coated side of the extrusion-coated nonwoven fabric layer (6) and the base layer (7). 2. Siegelfähiges Verpackungslaminat nach Anspruch 1 , dadurch gekennzeichnet, dass die Siegelschicht (4) mehrlagig ausgeführt ist.  2. sealable packaging laminate according to claim 1, characterized in that the sealing layer (4) is designed in several layers. 3. Siegelfähiges Verpackungslaminat nach Anspruch 2, dadurch gekennzeichnet, dass die Siegelschicht (4) zumindest eine Lage aus Ethylen-Vinylalkohol-Copolymeren umfasst. 3. sealable packaging laminate according to claim 2, characterized in that the sealing layer (4) comprises at least one layer of ethylene-vinyl alcohol copolymers. 4. Siegelfähiges Verpackungslaminat nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Basisschicht (7) eine weitere Laminatschicht (8) umfasst, wobei die weitere Laminatschicht (8) zwischen der Siegelschicht (4) und der Kaschierkleberschicht (5) angeordnet ist. 4. sealable packaging laminate according to one of claims 1 to 3, characterized in that the base layer (7) comprises a further laminate layer (8), wherein the further laminate layer (8) between the sealing layer (4) and the Kaschierkleberschicht (5) is arranged , 5. Siegelfähiges Verpackungslaminat nach Anspruch 4, dadurch gekennzeichnet, dass die weitere Laminatschicht (8) eine Schicht auf Basis von Polyethlyen, Polypropylen, Polyester, Polyamid, Polylactid, Ethylen-Vinylalkohol-Copolymer, metallisiertem biaxial gerecktem Polypropylen, metallisiertem Polyethylenterephthalat, mit Aluminiumoxid oder Siliziumoxid beschichtetem Polyethylenterephthalat oder Aluminium ist. 5. sealable packaging laminate according to claim 4, characterized in that the further laminate layer (8) a layer based on polyethylene, polypropylene, polyester, polyamide, polylactide, ethylene-vinyl alcohol copolymer, metallized biaxially oriented polypropylene, metallized polyethylene terephthalate, with alumina or Silica-coated polyethylene terephthalate or aluminum. 6. Siegelfähiges Verpackungselement nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Polymerfasern des Vliesstoffes (2) überwiegend in eine Richtung orientiert sind. 6. sealable packaging element according to one of claims 1 to 5, characterized in that the polymer fibers of the nonwoven fabric (2) are oriented predominantly in one direction. 7. Siegelfähiges Verpackungselement nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass im Vliesstoff (2) längliche Bondierpunkte vorgesehen sind.  7. sealable packaging element according to one of claims 1 to 6, characterized in that in the nonwoven fabric (2) elongated bonding points are provided. 8. Verfahren zur Herstellung eines siegelfähigen Verpackungslaminats, dadurch gekennzeichnet, dass eine extrusionsbeschichtete Vliesstoffschicht (6) bereitgestellt wird, die aus einem Vliesstoff (2) aus einem Polymer mit einem Flächengewicht zwischen 6 bis 30g/m2 und einer auf einer Seite des Vliesstoffes (2) aufextrudierten Extrusionsbeschichtung (3) auf Basis eines Polyolefins mit einer Schichtdicke zwischen 2 und 15g/m2 besteht, dass eine Basisschicht (7), die zumindest eine Siegelschicht (4) auf Basis eines siegelfähigen, thermoplastischen Polymers mit einer Dicke von 10 bis Ι ΟΟμηη umfasst, bereitgestellt wird und dass auf eine Seite der Basisschicht (7) und/oder auf die extrusionsbeschichtete Seite der extrusionsbeschichteten Vliesstoffschicht (3) ein Kaschierkleber aufgetragen wird und die Basisschicht (7) und die extrusionsbeschichtete Vliesstoffschicht (6) durch den Kaschierkleber miteinander verbunden werden. 8. A process for producing a sealable packaging laminate, characterized in that an extrusion-coated nonwoven fabric layer (6) is provided, which consists of a nonwoven fabric (2) made of a polymer having a basis weight between 6 to 30 g / m 2 and one on one side of the nonwoven fabric ( 2) on extruded extrusion coating (3) based on a polyolefin with a layer thickness between 2 and 15g / m 2 , that a base layer (7) is provided which comprises at least one sealing layer (4) based on a sealable, thermoplastic polymer with a thickness of 10 to Ι ΟΟμηη, and in that on one side of the base layer (7) and / or on the extrusion-coated side of the A laminated adhesive is applied to the extrusion-coated nonwoven fabric layer (3), and the base layer (7) and the extrusion-coated nonwoven fabric layer (6) are bonded to each other by the laminating adhesive. 9. Verpackung für Lebensmittel aus einem siegelfähigen Verpackungslaminat (1 ) nach einem der Ansprüche 1 bis 7.  9. Packaging for food from a sealable packaging laminate (1) according to one of claims 1 to 7.
PCT/EP2018/057026 2017-04-04 2018-03-20 Sealable packaging laminate with nonwoven fabric Ceased WO2018184831A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP18712206.4A EP3606746A1 (en) 2017-04-04 2018-03-20 Sealable packaging laminate with nonwoven fabric

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50265/2017 2017-04-04
ATA50265/2017A AT519469B1 (en) 2017-04-04 2017-04-04 Sealable packaging laminate with nonwoven fabric

Publications (1)

Publication Number Publication Date
WO2018184831A1 true WO2018184831A1 (en) 2018-10-11

Family

ID=61692014

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2018/057026 Ceased WO2018184831A1 (en) 2017-04-04 2018-03-20 Sealable packaging laminate with nonwoven fabric

Country Status (3)

Country Link
EP (1) EP3606746A1 (en)
AT (1) AT519469B1 (en)
WO (1) WO2018184831A1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060086682A1 (en) * 2004-10-26 2006-04-27 Ishida Co., Ltd. Display strip and a display strip and product assembly
US20100150479A1 (en) * 2008-12-15 2010-06-17 Exopack, Llc Multi-layered bags and methods of manufacturing the same
US20130098799A1 (en) * 2007-12-19 2013-04-25 Ishida Co., Ltd. Product assembly comprising a display strip and a product enclosed bag with a biaxial orientated film
CN205929690U (en) * 2016-08-22 2017-02-08 海宁市粤海彩印有限公司 Compound light packaging film and label bag are moulded to paper

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19806475A1 (en) * 1998-02-17 1999-08-19 Wolff Walsrode Ag Multi-layer sealing layer and hermetically sealable packaging material made with it
CH700868A2 (en) * 2009-04-23 2010-10-29 Alcan Tech & Man Ltd Container lid.
EP2589366A1 (en) * 2011-11-07 2013-05-08 IDT Biologika GmbH Biodegradable film packaging for oral biologicals

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060086682A1 (en) * 2004-10-26 2006-04-27 Ishida Co., Ltd. Display strip and a display strip and product assembly
US20130098799A1 (en) * 2007-12-19 2013-04-25 Ishida Co., Ltd. Product assembly comprising a display strip and a product enclosed bag with a biaxial orientated film
US20100150479A1 (en) * 2008-12-15 2010-06-17 Exopack, Llc Multi-layered bags and methods of manufacturing the same
CN205929690U (en) * 2016-08-22 2017-02-08 海宁市粤海彩印有限公司 Compound light packaging film and label bag are moulded to paper

Also Published As

Publication number Publication date
EP3606746A1 (en) 2020-02-12
AT519469A4 (en) 2018-07-15
AT519469B1 (en) 2018-07-15

Similar Documents

Publication Publication Date Title
AT519866B1 (en) Recyclable, easy-to-tear packaging laminate with good barrier effect and process for its production
AT522884B1 (en) Recyclable paper packaging with a high barrier against water vapor and oxygen
WO2018202479A1 (en) Recyclable, easily tearable packaging laminate having a good barrier effect, and method for production thereof
EP3880473B1 (en) Recyclable packaging laminate having a good barrier effect and low density, and method for the production thereof
EP3600889B1 (en) Recyclable packaging laminate with improved heat resistance during sealing
WO2012049195A1 (en) Tube laminate film having at least one oriented barrier layer and tube packaging formed at least partially from said tube laminate film
DE102007027873A1 (en) Multilayer laminate for tubes with embedded aluminum layer, method of manufacture and tube made therefrom
EP2094465B1 (en) Method for the production of a multilayer laminate, and multilayer laminate
EP3995307A1 (en) Polyethylene film
EP3840951B1 (en) Recyclable, easily tearable packaging laminate having a good barrier effect, and method for production thereof
AT519469B1 (en) Sealable packaging laminate with nonwoven fabric
EP2530029A1 (en) Packaging material for foodstuffs
EP2571681A1 (en) Laminate with a predetermined breaking point and reduced crack propagation
DE102016125669B4 (en) Tear-open packaging
DE202025105940U1 (en) High-barrier packaging laminate
DE102011075466A1 (en) Packaging composite film and packaging
EP2377682A1 (en) Method for producing a multi-layer packaging film
AT519653B1 (en) Composite film with a mineral oil barrier
EP3129224A1 (en) Laminate, in particular for producing a cover material, method for producing the same, and cover material made from a laminate of this type
EP3113948A1 (en) Film material for producing a packaging
WO2024110323A1 (en) Retort-sterilisable layered material made predominantly of polypropylene
EP1419976A2 (en) Composite material for a cover with coating produced by coextrusion
DE102022005097A1 (en) Retort-sterilizable layer material made predominantly from polypropylene
DE102022005098A1 (en) Retort-sterilizable layer material made predominantly from polypropylene
DE102022005099A1 (en) Retort-sterilizable layer material made predominantly from polypropylene

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18712206

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

ENP Entry into the national phase

Ref document number: 2018712206

Country of ref document: EP

Effective date: 20191104