Claims
- 1. A method of fabricating a composite thermoplastic resin film, comprising the steps of:
- providing a first melt of a first thermoplastic resin;
- providing a second melt of a second thermoplastic resin different from said first resin;
- continuously feeding said first and second melts simultaneously to an inlet port of a static mixer and allowing them to pass therethrough, so that a mixture comprising a matrix formed of said first resin, and a plurality of substantially continuous, parallel tapes dispersed within said matrix is formed;
- continuously discharging said mixture from an outlet port of said static mixer; and
- continuously extruding said mixture discharged from said static mixer as such through a die, thereby obtaining a composite, thermoplastic resin film comprising a matrix in the form of a film formed of the first thermoplastic resin, and a plurality of substantially continuous tapes dispersed within said matrix, with the plane of each of said tapes being substantially parallel with the plane of said film and each tape having a width of at least 200 times the thickness of the matrix so that the composite film has an oxygen permeation rate of 0.12-900 cc/m.sup.2.day.atm at a temperature of 20.degree. C. and a relative humidity of 65%.
- 2. A method as set forth in claim 1, wherein each of said tapes has a thickness in the range of 0.05 .mu.m to 10 .mu.m.
- 3. A method as set forth in claim 1, wherein the content of said tapes is 1-40% based on the total volume of said tapes and said matrix.
- 4. A method as set forth in claim 1, wherein the content of said tapes is 1-25% based on the total volume of said tapes and said matrix.
- 5. A method as set forth in claim 1, wherein said matrix has a thickness of from 2.5 .mu.m to 1.6 mm.
- 6. A method as set forth in claim 5, wherein a portion of said tapes has a width of at least 1000 times the thickness of said matrix.
- 7. A method as set forth in claim 4, wherein said first resin is a polyolefin, a polystyrene, a polyacrylonitrile, a polyester, a polycarbonate, a polyvinyl chloride, or a modified resin thereof.
- 8. A method as set forth in claim 1, wherein said second resin is a polyamide, a saponified ethylene-vinyl acetate copolymer, an ethylene-vinyl alcohol copolymer, a polyvinylidene chloride or a polyacrylonitrile copolymer.
Priority Claims (2)
Number |
Date |
Country |
Kind |
63-88244 |
Apr 1988 |
JPX |
|
63-99720 |
Apr 1988 |
JPX |
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CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a division of application Ser. No. 07/455,020, filed Dec. 22, 1989, now U.S. Pat. No. 5,019,439, issued May 28, 1991, which in turn is a continuation-in-part application of application Ser. No. 07/335,852, filed Apr. 10, 1989, and now abandoned.
US Referenced Citations (19)
Foreign Referenced Citations (3)
Number |
Date |
Country |
7040851 |
Sep 1971 |
FRX |
57-208244 |
Dec 1982 |
JPX |
6711464 |
Feb 1969 |
NLX |
Divisions (1)
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Number |
Date |
Country |
Parent |
455020 |
Dec 1989 |
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Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
335852 |
Apr 1989 |
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