# US 11,993,059 B2 · Multi-layer film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,993,059 B2 - Document ID: US11993059B2 - Status: Granted - Kind: B2 - Application number: 16/470,612 - Filed: 2017-11-08 - Published: 2020-03-19 - Granted: 2024-05-28 - Earliest claimed: 2016-12-19 - Assignees: Sabic Global Technologies B.V. - Applicants: Sabic Global Technologies B.V. - Inventors: Ling Fan; Jana Hrachova; Bart Van Den Esschert; Jun Zhou; Feng Gong - Web page: https://patentgrep.com/patent/US11993059B2 ## CPC - B32B 7/06: permitting easy separation - B32B 27/08: of synthetic resin - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 27/16: specially treated, e.g. irradiated - B32B 27/20: using fillers, pigments, thixotroping agents - B32B 27/306: {comprising vinyl acetate or vinyl alcohol (co)polymers} - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B65D 75/5855: {Peelable seals} - B32B 2250/03: 3 layers - B32B 2250/24: All layers being polymeric - B32B 2250/246: All polymers belonging to those covered by groups B32B27/32 and B32B27/30 - B32B 2264/102: Oxide or hydroxide - B32B 2270/00: Resin or rubber layer containing a blend of at least two different polymers - B32B 2307/31: Heat sealable - B32B 2307/72: Density - B32B 2307/732: Dimensional properties - B32B 2439/70: Food packaging - C09J 123/0853: {Vinylacetate} - Y10T 428/2817: Heat sealable - Y10T 428/2848: Three or more layers - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - 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 - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A multi-layer film for seal-peel applications, an article comprising said film and the use of said film a disclosed. The multi-layer film for seal-peel application comprising at least two layers, namely a cover layer and a seal layer, whereby the seal layer comprises between 25 and 80 wt. % of EVA and between 20 and 75 wt. % of LLDPE based on the total weight of the layer. ## Claims ### Claim 1 A multi-layer film for seal-peel application comprising at least two layers, namely a cover layer and a seal layer, wherein the cover layer comprises a first low density polyethylene (LDPE) cover layer and a second cover layer, the first LDPE cover layer is arranged on and in contact with the seal layer, the second cover layer is a blend of liner low density polyethylene (LLDPE) and a LDPE, and the second cover layer is arranged on and in contact with the first LDPE cover layer; and wherein the seal layer comprises between 30 and 75 wt. % of ethylene vinyl acetate (EVA) and between 25 and 70 wt. % of linear low density polyethylene (LLDPE) based on the total weight of the seal layer, the EVA is a copolymer of ethylene and vinyl acetate and the vinyl acetate content of the EVA is between 35 wt. % and 40 wt. % based on the total weight of the EVA, the melt flow index of the EVA ranges from 2 to 20 g/10 min, and the LLDPE has a density between 0.900 to 0.935 g/cm3 and a melt flow index ranging from 1 to 10 g/10 min. ### Claim 2 (depends on 1) The multi-layer film according to claim 1, wherein the amount of LLDPE in the seal layer is between 51 and 70 wt. % based on the total weight of the seal layer. ### Claim 3 (depends on 1) The multi-layer film according to claim 1, wherein the amount of EVA in the seal layer is between 30 to 49 wt. % based on the total weight of the seal layer. ### Claim 4 (depends on 1) The multi-layer film according to claim 1, wherein the seal layer comprises only one LLDPE. ### Claim 5 (depends on 1) The multi-layer film according to claim 1, wherein the seal layer is obtained by melt blending the LLDPE and EVA at a temperature between 120 and 200° C. ### Claim 6 (depends on 1) The multi-layer film according to claim 1, wherein the film has a peel strength on polyethylene terephthalate (PET) of between 1 and 20 N/15 mm, measured according to ASTM F88 method C with a strip width of 15 mm, a separation rate of 200 mm/min, and a sealing temperature of 80° C. ### Claim 7 (depends on 1) An article and/or packaging comprising the multi-layer film according to claim 1. ### Claim 8 (depends on 1) The multi-layer film according to claim 1, wherein the melt flow index of the LLDPE ranges from 2.5 to 3.5 g/10 min, wherein the amount of LLDPE in the seal layer is between 51 and 70 wt. % based on the total weight of the seal layer, wherein the amount of EVA in the seal layer is between 30 and 49 wt. % based on the total weight of the seal layer, wherein the melt flow index of the EVA ranges from 2 to 3 g/10 min or from 10 to 20 g/10 min, and wherein the film has a peel strength on polyethylene terephthalate (PET) of between 1.5 and 15 N/15 mm, measured according to ASTM F88 method C with a strip width of 15 mm, a separation rate of 200 mm/min, and a sealing temperature of 80° C. ### Claim 9 A multi-layer film for seal-peel application comprising a cover layer and a seal layer, wherein the seal layer comprises between 25 and 80 wt. % of ethylene vinyl acetate (EVA) and between 20 and 75 wt. % of linear low density polyethylene (LLDPE) based on the total weight of the seal layer, and wherein the cover layer comprises a first low density polyethylene (LDPE) cover layer and a second cover layer, wherein the first LDPE cover layer is arranged on and in contact with the seal layer, wherein the second cover layer is a blend of LLDPE and a LDPE, wherein the second cover layer is arranged on and in contact with the first LDPE cover layer, and the film has a peel strength on polyethylene terephthalate (PET) of between 1 and 20 N/15 mm, measured according to ASTM F88 method C with a strip width of 15 mm, a separation rate of 200 mm/min, and a sealing temperature of 80° C. ### Claim 10 (depends on 9) The multi-layer film according to claim 9, wherein the seal layer comprises only one LLDPE. ### Claim 11 (depends on 9) A multi-layer film according to claim 9, whereby the seal layer comprises between 25 and 50 wt. % of ethylene vinyl acetate (EVA) and between 50 and 75 wt. % of linear low density polyethylene (LLDPE) based on the total weight of the seal layer; and wherein vinyl acetate content of the EVA is between 35 wt. % and 50 wt. % based on the total weight of the EVA.