JPS5661444A - Production of blocking-resistant polypropylene film - Google Patents
Production of blocking-resistant polypropylene filmInfo
- Publication number
- JPS5661444A JPS5661444A JP13720579A JP13720579A JPS5661444A JP S5661444 A JPS5661444 A JP S5661444A JP 13720579 A JP13720579 A JP 13720579A JP 13720579 A JP13720579 A JP 13720579A JP S5661444 A JPS5661444 A JP S5661444A
- Authority
- JP
- Japan
- Prior art keywords
- melt
- kneaded
- stage
- film
- crystalline polypropylene
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
PURPOSE: To obtain the titled film suitable for use in packaging, by a method wherein finely divided silica and a crystalline polypropylene are melt-kneaded, a crystalline polypropylene is added to the kneaded mixt., the resulting mixt. is melt- kneaded and the resulting pellet is subjected to melt extrusion to produce a film.
CONSTITUTION: In the first stage, 0.5W4pts.wt. of finely divided silica having an average particle diameter of 120μ and 100pts.wt. of a crystalline polypropylene (e.g. an isotactic polypropylene including a copolymer of propylene with a small amount of a comonomer) are melt-kneaded. In the second stage, the compsn. obtd. from the first stage is blended with a crystalline polypropylene in such a proportion as to give a final compsn. having a finely divided silica content of 0.01W0.5wt%. The blend is melt-kneaded to obtain pellets. In the third stage, the pellets are subjected to melt extrusion to produce a film, thereby obtaining the titled polypropylene film.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13720579A JPS5661444A (en) | 1979-10-23 | 1979-10-23 | Production of blocking-resistant polypropylene film |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13720579A JPS5661444A (en) | 1979-10-23 | 1979-10-23 | Production of blocking-resistant polypropylene film |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5661444A true JPS5661444A (en) | 1981-05-26 |
Family
ID=15193236
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13720579A Pending JPS5661444A (en) | 1979-10-23 | 1979-10-23 | Production of blocking-resistant polypropylene film |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5661444A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59210961A (en) * | 1983-05-16 | 1984-11-29 | Nippon Petrochem Co Ltd | Resin composition for forming film having blocking resistance |
JPS60127310A (en) * | 1983-12-13 | 1985-07-08 | Mitsui Toatsu Chem Inc | Polypropylene film excellent in transparency, blocking and impact resistance |
WO2008101942A1 (en) * | 2007-02-21 | 2008-08-28 | Borealis Technology Oy | Polypropylene films having improved optical properties |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5654209A (en) * | 1979-10-12 | 1981-05-14 | Asahi Glass Co Ltd | Preparation of sulfur tetrafluoride |
-
1979
- 1979-10-23 JP JP13720579A patent/JPS5661444A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5654209A (en) * | 1979-10-12 | 1981-05-14 | Asahi Glass Co Ltd | Preparation of sulfur tetrafluoride |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59210961A (en) * | 1983-05-16 | 1984-11-29 | Nippon Petrochem Co Ltd | Resin composition for forming film having blocking resistance |
JPH0463097B2 (en) * | 1983-05-16 | 1992-10-08 | Nippon Petrochemicals Co Ltd | |
JPS60127310A (en) * | 1983-12-13 | 1985-07-08 | Mitsui Toatsu Chem Inc | Polypropylene film excellent in transparency, blocking and impact resistance |
JPH0531568B2 (en) * | 1983-12-13 | 1993-05-12 | Mitsui Toatsu Chemicals | |
WO2008101942A1 (en) * | 2007-02-21 | 2008-08-28 | Borealis Technology Oy | Polypropylene films having improved optical properties |
EP1964873A1 (en) * | 2007-02-21 | 2008-09-03 | Borealis Technology Oy | Polypropylene films having improved optical properties |
EP2172511A1 (en) * | 2007-02-21 | 2010-04-07 | Borealis Technology Oy | Polypropylene films having improved optical properties |
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