Patent application EP19181453A (EP), filed 2019-06-20
Publication number: EP3753732A1
Title: CONTAINER LINER FOR HOLDING LIQUIDS
Abstract: The present invention relates to a container liner for holding liquid goods, wherein the liner comprises a film comprising one or more layers, wherein at least one of said layers is a layer L1 comprising(a) ≥ 20.0 wt%, preferably ≥ 20.0 and ≤ 80.0 wt%, with regard to the total weight of that layer L1, of a polyethylene P1 having:• a density of > 900 and < 915 kg/m<sup>3</sup>, preferably of > 905 and < 913 kg/m<sup>3</sup> as determined in accordance with ASTM D1505 (2010);• a melt mass flow rate of ≥ 0.1 and ≤ 5.0 g/10 min, preferably of ≥ 0.5 and ≤ 2.0 g/10 min, as determined in accordance with ISO 1133-1 (2011) at 190°C using a load of 2.16 kg;and(b) ≥ 20.0 wt%, preferably ≥ 20.0 and ≤ 80.0 wt%, with regard to the total weight of that layer L1, of a polyethylene plastomer P2 having:• a density of > 880 and < 905 kg/m<sup>3</sup>, preferably of > 890 and < 904 kg/m<sup>3</sup> as determined in accordance with ASTM D1505 (2010);• a melt mass flow rate of ≥ 0.1 and ≤ 5.0 g/10 min, preferably of ≥ 0.5 and ≤ 2.0 g/10 min, as determined in accordance with ISO 1133-1 (2011) at 190°C using a load of 2.16 kg.Such container liner demonstrates a desirably high flex resistance, combined with a high dart impact resistance, and a high tensile strength.
IPC codes: B32B   1/    00            A I
B32B  27/    32            A I
C08L  23/    06            A I
C08L  23/    08            A I
B32B  27/    08            A I
Claims: number: 1
text: Container liner for holding liquid goods, wherein the liner comprises a film comprising one or more layers, wherein at least one of said layers is a layer L1 comprising
number: 2
text: Container liner according to claim 1, wherein the polyethylene plastomer P2 has
number: 3
text: Container liner according to any one of claims 1-2, wherein the film comprises at least three layers A/B/C or consists of three layers A/B/C, wherein the layer A is in direct contact with the layer B, and the layer B is in direct contact with the layer C, preferably wherein the composition of the layer A is the same as the composition of the layer C.
number: 4
text: Container liner according to any one of claims 1-3, wherein at least the layer B is a layer L1, preferably wherein the layer B is a layer L1.
number: 5
text: Container liner according to any one of claims 1-4, wherein the layer L1 comprises ≥ 2.5 and ≤ 15.0 wt% of a low-density polyethylene, preferably wherein the low-density polyethylene has a density of >900 and <935 kg/m<3>, preferably wherein the low-density polyethylene is a polyethylene produced via free-radical polymerisation of a reaction mixture comprising ethylene, wherein preferably the low-density polyethylene has an a melt mass flow rate of ≥ 0.1 and ≤ 5.0 g/10 min, preferably of ≥ 0.5 and ≤ 2.0 g/10 min, as determined in accordance with ISO 1133-1 (2011) at 190°C using a load of 2.16 kg.
number: 6
text: Container liner according to any one of claims 1-4, wherein the film comprises ≥ 2.5 wt%, more preferably ≥ 2.5 and ≤ 10.0 wt%, of a high-density polyethylene having a density of >945 and <965 kg/m<3>, as determined in accordance with ASTM D1505 (2010), preferably wherein the high density polyethylene is a bimodal high density polyethylene.
number: 7
text: Container liner according to any one of claims 1-6, wherein the film has a thickness of ≥ 100 µm, preferably ≥ 100 and ≤ 1000 µm.
number: 8
text: Container liner according to any one of claims 1-7 wherein the film has a density of < 912 kg/m<3>, as determined in accordance with ASTM D1505 (2010), preferably of > 900 and < 912 kg/m<3>.
number: 9
text: Container liner according to any one of claims 1-8, wherein the liner has such dimensions allowing to contain a liquid volume of between 1.0 and 30.0 m<3>.
number: 10
text: Container liner according to any one of claims 1-9, wherein the liner further comprises at least one closable opening for filling and/or evacuating the liner, preferably wherein the liner comprises a closable opening for filling and evacuating the liner.
number: 11
text: Transportation unit comprising a container liner according to any one of claims 1-10.
number: 12
text: Transportation unit according to claim 11, wherein the container liner comprises a volume of liquid goods.
number: 13
text: Transportation unit according to claim 12 wherein the liquid goods are selected from potable liquids such as beverages, syrups, oils, fats, vinegars, and detergents.
number: 14
text: Transportation unit according to any one of claims 11-13, wherein the transportation unit is a box, preferably a cardboard box, or an intermodal container.
number: 15
text: Use of a film comprising one or more layers, wherein at least one of said layers is a layer L1 comprising
Office action: search_report, dated 2020-12-23
Prior art cited: ref_id: WO2011004001A1
ref_type: patent
severity: background
ref_id: US6492010B1
ref_type: patent
severity: background
ref_id: US6492010
ref_type: patent
severity: background
ref_id: WO2011004001
ref_type: patent
severity: background
Final disposition: pending (2020-12-23)