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    HEAT-SEALABLE PACKAGING FILM PRESENTING A PEELABLE JOINT, PROCESS FOR ITS PREPARATION, AND PACKAGING MATERIALS
    4.
    发明专利
    HEAT-SEALABLE PACKAGING FILM PRESENTING A PEELABLE JOINT, PROCESS FOR ITS PREPARATION, AND PACKAGING MATERIALS 未知

    公开(公告)号：DE3069419D1

    公开(公告)日：1984-11-15

    申请号：DE3069419

    申请日：1980-08-06

    Applicant: UCB SA

    Inventor： BONTINCK WALTER ,  D HONDT MARC ,  JACOBS ROLAND

    IPC: B65D65/02 ,  B32B27/26 ,  B32B27/32 ,  B32B27/36 ,  C08J5/18 ,  C08J7/00 ,  C08L23/04 ,  C08L23/06 ,  C08L25/04 ,  C08L25/10 ,  C08L53/02

    Abstract: Heat-sealable packaging film producing a peelable seal, process for the preparation thereof and packages made therefrom or comprising such a film. This film produces such a seal on a wide range of packaging films, including polyester, polyvinyl chloride, polyamide and polyacrylonitrile films owing to: 1. its chemical composition which comprises: (a) 55 to 95% by weight of at least one ethylene polymer selected from polyethylene having a density of from 0.91 to 0.93 g/cm3 and an ethylene-vinyl acetate copolymer containing at most 10% by weight of vinyl acetate, (b) 5 to 30% by weight of polystyrene, and (c) 0 to 20% by weight of a thermoplastic, elastomeric styrene-butadiene-styrene or styrene-isoprene-styrene block copolymer, and 2. the fact that that face of the film which is intended to form the peelable seal, has a surface tension of from 35 to 50, preferably of 37 to 45 millinewtons per meter. The film is prepared by extrusion followed by a corona discharge pretreatment of said face.

    6.
    发明专利
    未知

    公开(公告)号：DK169553B1

    公开(公告)日：1994-11-28

    申请号：DK335680

    申请日：1980-08-04

    Applicant: UCB SA

    Inventor： BONTINCK WALTER ,  HONDT MARC D ,  JACOBS ROLAND

    IPC: B65D65/02 ,  B32B27/26 ,  B32B27/32 ,  B32B27/36 ,  C08J5/18 ,  C08J7/00 ,  C08L23/04 ,  C08L23/06 ,  C08L25/04 ,  C08L25/10 ,  C08L53/02

    Abstract: Heat-sealable packaging film producing a peelable seal, process for the preparation thereof and packages made therefrom or comprising such a film. This film produces such a seal on a wide range of packaging films, including polyester, polyvinyl chloride, polyamide and polyacrylonitrile films owing to: 1. its chemical composition which comprises: (a) 55 to 95% by weight of at least one ethylene polymer selected from polyethylene having a density of from 0.91 to 0.93 g/cm3 and an ethylene-vinyl acetate copolymer containing at most 10% by weight of vinyl acetate, (b) 5 to 30% by weight of polystyrene, and (c) 0 to 20% by weight of a thermoplastic, elastomeric styrene-butadiene-styrene or styrene-isoprene-styrene block copolymer, and 2. the fact that that face of the film which is intended to form the peelable seal, has a surface tension of from 35 to 50, preferably of 37 to 45 millinewtons per meter. The film is prepared by extrusion followed by a corona discharge pretreatment of said face.

    METHOD OF MANUFACTURING AN ARTIFICIAL PAPER
    7.
    发明专利
    METHOD OF MANUFACTURING AN ARTIFICIAL PAPER 未知

    公开(公告)号：CA978685A

    公开(公告)日：1975-11-25

    申请号：CA117036

    申请日：1971-06-29

    Applicant: UCB SA

    Inventor： BONTINCK WALTER ,  DE COSTER WILLY

    IPC: C08L23/02

    Abstract: 1336492 Polyolefin compositions U C B 30 June 1971 [3 July 1970] 30648/71 Heading C3P [Also in Division B5] Compositions which may be homogenized and extruded to form paper substitutes comprise (A) 30 to 94À8 weight per cent of a homopolymer or copolymer of ethylene, propylene or butene or mixture thereof having a melt index of less than 1 dg/min; (B) 0À1 to 35 weight per cent of at least one polymer incompatible with (A) which forms a brittle film when extruded alone and has a melt index of less than 10 dg/min, selected from polymers of styrene, halo-alkyl styrenes, vinyl and vinylidene chlorides and C 1-3 alkyl (meth) acrylates; (C) 0À1 to 35 weight per cent. of a macromolecular compatibilizer for (A) and (B) and selected from (1) copolymers of at least one of ethylene, propylene and butene with at least one of isobutylene, butadiene and isoprene, and (2) at least one homopolymer of ethylene, propylene or butene mixed with at least one homopolymer of isobutylene, butadiene or isoprene, (C) having a melt index of at most 2 dg/min; (D) 5 to 45 weight per cent of mineral filler having a particle size below 50 microns; and (E) 0 to 10 weight per cent of antioxidants, thermal stabilizers, brighteners, colourants, antistatic agents and/or lubricants. Many suitable materials are specified and examples describe the preparation of paper substitutes by mixing and extruding compositions comprising (1) high density polyethylene, high impact polystyrene containing 10 per cent polybutadiene, polyethylene/polyisobutylene mixture, titanium dioxide, calcium carbonate and paraffin oil; (2) high density polyethylene, styrene/butadiene copolymer, ethylene/isobutylene copolymer, titanium dioxide, calcium carbonate and C 12-18 alkylamines; and (3) high density polyethylene, isotactic polypropylene, polystyrene/polybutadiene mixture, polyethylene/butyl rubber mixture, calcium carbonate, titanium dioxide, paraffin oil and optical brightener.

    HEAT-SEALABLE PACKAGING FILM PRODUCING A PEELABLE SEAL
    8.
    发明专利
    HEAT-SEALABLE PACKAGING FILM PRODUCING A PEELABLE SEAL 未知

    公开(公告)号：CA1148500A

    公开(公告)日：1983-06-21

    申请号：CA357655

    申请日：1980-08-06

    Applicant: UCB SA

    Inventor： BONTINCK WALTER ,  D HONDT MARC ,  JACOBS ROLAND

    IPC: B65D65/02 ,  B32B27/26 ,  B32B27/32 ,  B32B27/36 ,  C08J5/18 ,  C08J7/00 ,  C08L23/04 ,  C08L23/06 ,  C08L25/04 ,  C08L25/10 ,  C08L53/02 ,  B32B27/08 ,  B32B27/16

    Abstract: Heat-sealable packaging film producing a peelable seal, process for the preparation thereof and packages made therefrom or comprising such a film. This film produces such a seal on a wide range of packaging films, including polyester, polyvinyl chloride, polyamide and polyacrylonitrile films owing to: 1. its chemical composition which comprises: (a) 55 to 95% by weight of at least one ethylene polymer selected from polyethylene having a density of from 0.91 to 0.93 g/cm3 and an ethylene-vinyl acetate copolymer containing at most 10% by weight of vinyl acetate, (b) 5 to 30% by weight of polystyrene, and (c) 0 to 20% by weight of a thermoplastic, elastomeric styrene-butadiene-styrene or styrene-isoprene-styrene block copolymer, and 2. the fact that that face of the film which is intended to from the peelable seal, has a surface tension of from 35 to 50, preferably of 37 to 45 millinewtons per meter. The film is prepared by extrusion followed by a corona discharge pretreatment of sufficient intensity of the said face.

    FILMS FROM MODIFIED REGENERATED CELLULOSE
    9.
    发明专利
    FILMS FROM MODIFIED REGENERATED CELLULOSE 未知

    公开(公告)号：CA1053409A

    公开(公告)日：1979-05-01

    申请号：CA235713

    申请日：1975-09-15

    Applicant: UCB SA

    Inventor： CORNILLE GEORGES ,  JACOBS ROLAND ,  BONTINCK WALTER

    IPC: C08L1/00 ,  C08L1/06 ,  C08B16/00

    Abstract: A modified regenerated cellulose film comprising regenerated cellulose and certain modified starches is clear and transparent and has substantially the same mechanical and optical properties as conventional unmodified regenerated cellulose films. Furthermore, the impermeability to gases is fully retained and the film is more biodegradable than conventional films of regenerated cellulose. The modified starches used are starches degraded by oxidation and/or hydrolysis, uncrosslinked ethers or esters of starch or of starches degraded by oxidation and/or hydrolysis or mixtures thereof. The amount of modified starch used represents 1 to 49% by weight, preferably 5 to 30% by weight, based on the total weight of cellulose and modified starch. Methods for the production of said modified regenerated cellulose film either by the viscose process or by the cuprammonium process are also described.

    10.
    发明专利
    未知

    公开(公告)号：RO63330A

    公开(公告)日：1978-06-15

    申请号：RO6749571

    申请日：1971-06-29

    Applicant: UCB SA

    Inventor： BONTINCK WALTER ,  DE COSTER WILLY

    IPC: C08L23/02 ,  D21H3/02 ,  D21H3/38

    Abstract: 1336492 Polyolefin compositions U C B 30 June 1971 [3 July 1970] 30648/71 Heading C3P [Also in Division B5] Compositions which may be homogenized and extruded to form paper substitutes comprise (A) 30 to 94À8 weight per cent of a homopolymer or copolymer of ethylene, propylene or butene or mixture thereof having a melt index of less than 1 dg/min; (B) 0À1 to 35 weight per cent of at least one polymer incompatible with (A) which forms a brittle film when extruded alone and has a melt index of less than 10 dg/min, selected from polymers of styrene, halo-alkyl styrenes, vinyl and vinylidene chlorides and C 1-3 alkyl (meth) acrylates; (C) 0À1 to 35 weight per cent. of a macromolecular compatibilizer for (A) and (B) and selected from (1) copolymers of at least one of ethylene, propylene and butene with at least one of isobutylene, butadiene and isoprene, and (2) at least one homopolymer of ethylene, propylene or butene mixed with at least one homopolymer of isobutylene, butadiene or isoprene, (C) having a melt index of at most 2 dg/min; (D) 5 to 45 weight per cent of mineral filler having a particle size below 50 microns; and (E) 0 to 10 weight per cent of antioxidants, thermal stabilizers, brighteners, colourants, antistatic agents and/or lubricants. Many suitable materials are specified and examples describe the preparation of paper substitutes by mixing and extruding compositions comprising (1) high density polyethylene, high impact polystyrene containing 10 per cent polybutadiene, polyethylene/polyisobutylene mixture, titanium dioxide, calcium carbonate and paraffin oil; (2) high density polyethylene, styrene/butadiene copolymer, ethylene/isobutylene copolymer, titanium dioxide, calcium carbonate and C 12-18 alkylamines; and (3) high density polyethylene, isotactic polypropylene, polystyrene/polybutadiene mixture, polyethylene/butyl rubber mixture, calcium carbonate, titanium dioxide, paraffin oil and optical brightener.

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