# US 10,246,235 B2 · Packaging film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,246,235 B2 - Document ID: US10246235B2 - Status: Granted - Kind: B2 - Application number: 15/264,948 - Filed: 2016-09-14 - Published: 2017-01-05 - Granted: 2019-04-02 - Earliest claimed: 2014-03-21 - Assignees: Infiana Germany GmbH & Co. KG - Applicants: Infiana Germany GmbH & Co. KG - Inventors: Ingrid Sebald; Werner Schmidt; Felix Grimm - Web page: https://patentgrep.com/patent/US10246235B2 ## CPC - B65D 65/14: with areas coated with adhesive - B29C 48/0018: {combined with shaping by orienting, stretching or shrinking, e.g. film blowing (B29C48/0017 takes precedence)} - B29C 48/002: {combined with surface shaping} - B29C 48/18: the components being layers - B32B 1/00: Layered products having a non-planar shape - B32B 1/08: Tubular products - B32B 3/30: characterised by a layer formed with recesses or projections, e.g. {hollows, grooves, protuberances, ribs (apertured layer B32B3/266; layer with cavities or internal voids B32B3/26)} - B32B 7/06: permitting easy separation - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 27/08: of synthetic resin - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B32B 38/06: Embossing - B65D 33/007: {for facilitating the separation of the two walls, e.g. walls of inequal height, tabs; for maintaining the mouth of the sack or bag open} - B65D 65/00: Wrappers or flexible covers; Packaging materials of special type or form (wrappers or envelopes with shock-absorbing properties B65D81/03) - B29K 2101/12: Thermoplastic materials - B29L 2031/7128: {Bags, sacks, sachets (tea bags B29L2031/7122; medical bags B29L2031/7148)} - B32B 37/04: characterised by the partial melting of at least one layer - B32B 37/12: characterised by using adhesives - B32B 2037/148: {whereby layers material is selected in order to facilitate recycling of the laminate} - B32B 2250/24: All layers being polymeric - B32B 2250/242: All polymers belonging to those covered by group B32B27/32 - B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer - B32B 2255/26: Polymeric coating - B32B 2307/514: Oriented - B32B 2307/516: mono-axially - B32B 2307/544: Torsion strength; Torsion stiffness - B32B 2307/5825: Tear resistant - B32B 2307/7242: Non-permeable - B32B 2307/7244: Oxygen barrier - B32B 2307/7246: Water vapor barrier - B32B 2307/7248: Odour barrier - B32B 2307/748: Releasability - B32B 2439/46: Bags - B32B 2553/00: Packaging equipment or accessories not otherwise provided for - B32B 2555/00: Personal care - 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 - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS - B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES ## Abstract A packaging film made of an at least monoaxially stretched, multi-layered plastic film comprised of at least up to 50% by weight of polyolefins and having a total thickness ≤18 μm, which has an expansion of up to a maximum of 1% at a tensile force of at least 3N per 25 mm width according to DIN EN ISO 527.3 ## Claims ### Claim 1 A packing film comprising an unembossed multilayer polymeric film having a total thickness ≤18 μm, which is oriented at least monoaxially in machine direction to an orientation ratio of at least 1:2, which comprises at least to an extent of 50 wt % polyethylenes (PE), polypropylenes (PP), their mixtures or copolymers, which comprises a layer sequence of at least five layers composed of a) a layer (a) as surface layer comprising a mixture of LDPE and MDPE or a mixture of LDPE, MDPE and PP, b) an adhesion promoter layer (b), c) a layer (c), based on a mixture of LDPE and MDPE or a mixture of LDPE, MDPE and PP or ethylene/vinyl alcohol copolymers, polyvinyl alcohols, polyamides, copolyamides, polyesters and/or polyether-polyamide block copolymers, d) an adhesion promoter layer (d), and e) a layer e) as surface layer comprising a mixture of LDPE and MDPE or a mixture of LDPE, MDPE and PP, and which has an elongation of up to at most 1% under a tensile force of at least 3 N per 25 mm width in accordance with DIN EN ISO 527-3 and has no embossed structure on its surface layers. ### Claim 2 (depends on 1) A packing film as claimed in claim 1, consisting of the multilayer polymeric film. ### Claim 3 (depends on 1) A packing film as claimed in claim 1, wherein the polymeric film in machine direction has an orientation ratio of at least 1:3. ### Claim 4 (depends on 1) A packing film as claimed in claim 1, wherein the polymeric film comprises to an extent of at least 70 wt % polyethylenes (PE), polypropylenes (PP), their mixtures or copolymers. ### Claim 5 (depends on 4) A packing film as claimed in claim 4, wherein the polymeric film consists to an extent of at least 70 wt. % of LDPE, MDPE, LLDPE, polypropylenes (PP), or a mixture of at least two of said polyolefins. ### Claim 6 (depends on 1) A packing film as claimed in claim 1, wherein the polymeric film has at least one barrier layer against gasses, against fats and oils or against migration of low molecular mass organic compounds and/or against moisture. ### Claim 7 (depends on 6) A packing film as claimed in claim 6, wherein the barrier layer of the polymeric film is made up of ethylene/vinyl alcohol copolymers, polyvinyl alcohols, polyamides, copolyamides, polyesters and/or polyether-polyamide block copolymers. ### Claim 8 (depends on 1) A packing film as claimed in claim 1, wherein the layer (a) further comprises fillers and auxiliaries, and the layer (c) is a barrier layer based on a polyamide. ### Claim 9 (depends on 8) A packing film as claimed in claim 8, wherein the barrier layer of the polymeric film is based on an aliphatic polyamide or (partially) aromatic copolyamide. ### Claim 10 (depends on 9) A packing film as claimed in claim 9, wherein the unembossed polymeric film oriented in machine direction has a higher tear strength in machine direction than that transversely to the machine direction. ### Claim 11 (depends on 1) A packing film as claimed in claim 1, wherein the polymeric film has a release coating on at least one of its surfaces. ### Claim 12 (depends on 1) A packaging produced from a packing film of claim 1. ### Claim 13 (depends on 12) A packaging as claimed in claim 12 for individually packaged panty liners, sanitary towels or incontinence articles. ### Claim 14 (depends on 12) A packaging as claimed in claim 12 for individually packaged self-adhesive articles for single use. ### Claim 15 (depends on 14) A packaging as claimed in claim 14 for self-adhesive hygiene articles or incontinence articles.