公开(公告)号：SG54479A1

公开(公告)日：1998-11-16

申请号：SG1997000835

申请日：1997-03-18

Applicant: MITSUI PETROCHEMICAL IND

Inventor： TANAKA YASUO ,  SUGI MASAHIRO ,  NAKAGAWA NORIHIKO

IPC: C08F110/06 ,  C08L23/00 ,  C08L23/08 ,  C08J5/18 ,  C08L23/10 ,  C08L23/12 ,  C09J7/00

Abstract: DISCLOSED IS A POLYPROPYLENE FILM FORMED FROM A POLYPROPYLENE COMPOSITION COMPRISING A 5 TO 60 PARTS BY WEIGHT OF A SPECIFIC ETHYLENE/C5-C20 (ALPHA)-OLEFIN RANDOM COPOLYMER (A) AND 40 TO 95 PART BY WEIGHT OF CRYSTALLINE POLYPROPYLENE (B), THE TOTAL AMOUNT OF SAID COMPONENTS (A) AND (B) BEING 100 PARTS BY WEIGHT. THE ETHYLENE/C5-C20 (ALPHA)-OLEFIN RANDOM COPOLYMER (A) IS A COPOLYMER COMPRISING ETHYLENE AND AN (ALPHA)-OLEFIN OF 5 TO 20 CARBON ATOMS AND HAS THE PROPERTIES: THE DENSITY IS IN THE RANGE OF 0.870 TO 0.900 G/CM3; THE MELT FLOW RATE (MFR, ASTM D 1238, 190?C, LOAD OF 2.16 KG) IS IN THERANGE OF 0.01 TO 50 G/10 MIN; AND THE TEMPERATURE (TM (?C)) AT THE POSITION OF THE MAXIMUM PEAK OF AN ENDOTHERM CURVE OF THIS COPOLYMER MEASURED BY DSC AND THE DENSITY (D (G/CM3)) SATISFY A SPECIFIC RELATION. THE POLYPROPYLENE FILM HAS EXCELLENT TRANSPARENCY, IMPACT RESISTANCE (FILM IMPACT STRENGTH) AND LOW-TEMPERATURE HEAT-SEALING PROPERTIES, AND BESIDES THE FILM SHOWS EXCELLENT TENSILE PROPERTIES, HEAT-SEALING STRENGTH PROPERTIES, BLOCKING RESISTANCE AND SLIP PROPERTIES.

公开(公告)号：ID16372A

公开(公告)日：1997-09-25

申请号：ID970879

申请日：1997-03-18

Applicant: MITSUI PETROCHEMICAL IND

Inventor： TANAKA YASUO ,  SUGI MASAHIRO ,  NAKAGAWA NORIHIKO

IPC: C08F110/06 ,  C08L23/00 ,  C08J5/18 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C09J7/00

Abstract: DISCLOSED IS A POLYPROPYLENE FILM FORMED FROM A POLYPROPYLENE COMPOSITION COMPRISING A 5 TO 60 PARTS BY WEIGHT OF A SPECIFIC ETHYLENE/C5-C20 (ALPHA)-OLEFIN RANDOM COPOLYMER (A) AND 40 TO 95 PART BY WEIGHT OF CRYSTALLINE POLYPROPYLENE (B), THE TOTAL AMOUNT OF SAID COMPONENTS (A) AND (B) BEING 100 PARTS BY WEIGHT. THE ETHYLENE/C5-C20 (ALPHA)-OLEFIN RANDOM COPOLYMER (A) IS A COPOLYMER COMPRISING ETHYLENE AND AN (ALPHA)-OLEFIN OF 5 TO 20 CARBON ATOMS AND HAS THE PROPERTIES: THE DENSITY IS IN THE RANGE OF 0.870 TO 0.900 G/CM3; THE MELT FLOW RATE (MFR, ASTM D 1238, 190?C, LOAD OF 2.16 KG) IS IN THERANGE OF 0.01 TO 50 G/10 MIN; AND THE TEMPERATURE (TM (?C)) AT THE POSITION OF THE MAXIMUM PEAK OF AN ENDOTHERM CURVE OF THIS COPOLYMER MEASURED BY DSC AND THE DENSITY (D (G/CM3)) SATISFY A SPECIFIC RELATION. THE POLYPROPYLENE FILM HAS EXCELLENT TRANSPARENCY, IMPACT RESISTANCE (FILM IMPACT STRENGTH) AND LOW-TEMPERATURE HEAT-SEALING PROPERTIES, AND BESIDES THE FILM SHOWS EXCELLENT TENSILE PROPERTIES, HEAT-SEALING STRENGTH PROPERTIES, BLOCKING RESISTANCE AND SLIP PROPERTIES.

公开(公告)号：JPH09278909A

公开(公告)日：1997-10-28

申请号：JP9448696

申请日：1996-04-16

Applicant: MITSUI PETROCHEMICAL IND

Inventor： TANAKA YASUO ,  SUGI MASAHIRO ,  NAKAGAWA NORIHIKO

IPC: C08J5/18 ,  B29C61/06 ,  B29K23/00 ,  B29K105/02 ,  B29L7/00 ,  C08F4/625 ,  C08L23/00 ,  C08L23/10

Abstract: PROBLEM TO BE SOLVED: To obtain the subject film for foods package, comprising a respectively specific crystalline polypropylene and the copolymer, having excellent transpar ency and excellent in low temperature-drawing property, low temperature heat- shrinking property and blocking-resistant property. SOLUTION: This film comprises a polypropylene composition containing (A) 50-95 pts.wt. of a crystalline polypropylene with a melt index of 0.1-20 and (B) 5-50pts.wt. of a propylene- and 1-butene random copolymer and is drawn in at least one direction of longitudinal and transverse directions. The component B contains 50-95 mole % of a constitution unit deriving from propylene and 5-50 mole % of a constitution unit deriving from 1-butene, and possesses a limiting viscosity of 0.1-12dl/g which is measured in decaline at 135 deg.C, a molecular weight distribution of more than 3 which is obtained by get permeation chromatography and a parameter B value of 1.0-1.5 indicating a random property of copolymerization monomer chain distribution. Moreover, in order to obtain the component B, it is preferable to carry out copolymerization in the presence of a catalyst for olefin polymerization containing a transition metal compound, e.g. rac-dimethylsilylene-bis[1-(2,7-dimethyl-4-ethylidenyl]-zirconium dichloride or the like.

公开(公告)号：JPH08269257A

公开(公告)日：1996-10-15

申请号：JP7207395

申请日：1995-03-29

Applicant: MITSUI PETROCHEMICAL IND

Inventor： HAMADA NAOSHI ,  YAMAMOTO AKIHIKO ,  NISHIMURA TOSHIHIRO ,  NAKAGAWA NORIHIKO

IPC: B32B27/32 ,  C08L23/00 ,  C08L23/04 ,  C08L23/08 ,  C08L23/18

Abstract: PURPOSE: To improve the low-temp. heat sealability, hot tack properties, impact resistance, unsealability, and extrudability of a polyethylene resin compsn. for a laminated film by compounding a specific linear low-density PE resin, a linear medium- to high-density PE resin, and a high-pressure low-density PE resin. CONSTITUTION: This compsn. comprises 40-65wt.% linear low-density PE resin which is a copolymer produced by copolymerizing ethylene and 1-10mol% 4C or higher α-olefin using a metallocene catalyst and has a melt flow rate (190 deg.C) of 0.1-1.0g/10min. a density of 0.900-0.918g/cm , and a mol.wt. distribution (Muslin) by GPC of 1.5-3.5, 30-55wt.% linear medium-to high-density PE resin which is an ethylene homopolymer or a copolymer of ethylene and 10 mol % or lower 3-20C α-olefin and has a melt flow rate of 5.0-8.0, a density of 0.910-970g/cm , and a mol.wt. distribution of 2.0-5.0, and 5-30wt.% high-pressure low-density PE resin which is an ethylene homopolymer or a copolymer of ethylene and 2-10mol% vinyl acetate and has a density of 0.915-0.924g/cm3.

公开(公告)号：JPH09309983A

公开(公告)日：1997-12-02

申请号：JP5361197

申请日：1997-03-07

Applicant: MITSUI PETROCHEMICAL IND

Inventor： TANAKA YASUO ,  SUGI MASAHIRO ,  NAKAGAWA NORIHIKO

IPC: C08J5/18 ,  C08F110/06 ,  C08L23/00 ,  C08L23/08 ,  C08L23/10 ,  C08L23/12 ,  C09J7/00

Abstract: PROBLEM TO BE SOLVED: To obtain a polypropylene film excellent in low-temp. sealability by compound an ethylene-α-olefin random copolymer having specified density and flow rate with a crystalline polypropylene in a specified wt. ratio. SOLUTION: Ethylene and a 5-20C α-olefin are copolymerized in the presence of a metallocene catalyst to give an ethylene-α-olefin copolymer which has a density of 0.870-0.900g/cm and a melt flow rate (190 deg.C, 2.16kg load) of 0.01-50g/10min and satisfies the relation that when 0.885 Tm>=(14d/15)×1,000-744 and, when 0.870 Tm ); and Tm ( deg.C) is the temp. of the max. peak position in the endothermic curve obtd. with a differential scanning calorimeter]. The copolymer is kneaded together with a crystalline polypropylene in a wt. ratio of (5:95)-(60:40) and formed into a film by the T-die method, etc., to give the objective polypropylene film.