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1. WO2020114760 - BOPP MULTILAYER FILM

Publication Number WO/2020/114760
Publication Date 11.06.2020
International Application No. PCT/EP2019/081638
International Filing Date 18.11.2019
IPC
B32B 27/08 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27Layered products essentially comprising synthetic resin
06as the main or only constituent of a layer next to another layer of a specific substance
08of synthetic resin of a different kind
B32B 27/30 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27Layered products essentially comprising synthetic resin
30comprising vinyl resin; comprising acrylic resin
B32B 27/32 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
27Layered products essentially comprising synthetic resin
32comprising polyolefins
C08J 5/18 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
5Manufacture of articles or shaped materials containing macromolecular substances
18Manufacture of films or sheets
C08L 23/10 2006.01
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
23Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
02not modified by chemical after-treatment
10Homopolymers or copolymers of propene
CPC
B32B 2250/03
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
2250Layers arrangement
033 layers
B32B 2250/24
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
2250Layers arrangement
24All layers being polymeric
B32B 2250/242
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
2250Layers arrangement
24All layers being polymeric
242All polymers belonging to those covered by group B32B27/32
B32B 2250/246
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
2250Layers arrangement
24All layers being polymeric
246All polymers belonging to those covered by groups B32B27/32 and B32B27/30
B32B 2264/02
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
2264Composition of particles which form a particulate layer or are present as additives
02Synthetic macromolecular particles
B32B 2270/00
BPERFORMING OPERATIONS; TRANSPORTING
32LAYERED PRODUCTS
BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
2270Resin or rubber layer containing a blend of at least two different polymers
Applicants
  • BASELL POLIOLEFINE ITALIA S.R.L. [IT]/[IT]
Inventors
  • FELISATI, Andrea
  • IZZI, Marco
  • MASSARI, Paola
Agents
  • SACCO, Marco
Priority Data
18210379.605.12.2018EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) BOPP MULTILAYER FILM
(FR) FILM MULTICOUCHE BOPP
Abstract
(EN)
A BOPP multilayer film having at least three layers wherein each layer comprises the same nucleated propylene polymer composition; said propylene polymer composition having: A) from 77 wt% to 91 wt%, of a propylene homopolymer having a fraction insoluble in xylene at 25 °C higher than 95 %; B) from 9 wt % to 23 wt%, of a copolymer of propylene with from 28.0 wt% to 42.0 wt% of ethylene derived units; the composition having an intrinsic viscosity of the fraction soluble in xylene at 25 °C comprised between 1.0 dl/g and 1.9 dl/g, a fraction soluble in xylene at 25 °C comprised between 9.0 wt% and 21.0 wt%, a total melt flow rate (Melt Flow Rate according to ISO 1133, condition L, i.e. 230°C and 2.16 kg load) comprised between 1.5 and 5 g/lO min and the value of the relation: 22.5+0.2*MFR-1.2*Xs+0.2*IV is higher than 5.9; wherein MFR is the melt flow rate of the nucleated composition (Melt Flow Rate according to ISO 1133, condition L, i.e. 230°C and 2.16 kg load); IV is the intrinsic viscosity of the fraction soluble in xylene at 25 °C; and Xs is the fraction soluble in xylene at 25°C; wherein the amount of A+B is equal to 100 wt% and wherein the nucleated agent is selected from the group consisting of aromatic or aliphatic carboxylic acids, aromatic metal phosphates, sorbitol derivatives and talc.
(FR)
L'invention concerne un film multicouche BOPP comportant au moins trois couches, chaque couche comprenant la même composition de polymère de propylène nucléé ; ladite composition de polymère de propylène ayant : A) de 77 % en poids à 91 % en poids, d'un homopolymère de propylène ayant une fraction Insoluble dans le xylène à 25 °C supérieure à 95 % ; B) de 9 % en poids à 23 % en poids d'un copolymère de propylène avec 28,0 % en poids à 42,0 % en poids d'unités dérivées de l'éthylène ; la composition ayant une viscosité intrinsèque de la fraction soluble dans le xylène à 25 °C comprise entre 1,0 dl/g et 1,9 dl/g, une fraction soluble dans le xylène à 25 °C comprise entre 9,0 % en poids et 21,0 % en poids, un débit de fusion total (débit de fusion selon la norme ISO 1133, condition L, c'est-à-dire 230 °C et charge de 2,16 kg) comprise entre 1,5 et 5 g/lO min et la valeur de la relation : 22,5 +0,2 * MFR 1,2 * Xs + 0,2 * IV est supérieure à 5,9 ; MFR étant le débit de fusion de la composition nucléée (débit de fusion selon la norme ISO 1133, condition L, c'est-à-dire 230 °C et charge de 2,16 kg) ; IV est la viscosité intrinsèque de la fraction soluble dans le xylène à 25 °C ; et Xs est la fraction soluble dans le xylène à 25 °C ; la quantité de A + B étant égale à 100 % en poids et l'agent nucléé étant choisi dans le groupe constitué d'acides carboxyliques aromatiques ou aliphatiques, de phosphates métalliques aromatiques, de dérivés de sorbitol et de talc.
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