Claims
- 1. A parison, as a precursor of a container, formed by using an injection-molding machine, comprising
- an open end part of a mouth portion composed of a thermoplastic resin (resin A), and
- parts other than the open end part of the mouth portion comprising an inside surface layer and an outside surface layer which are composed of the resin A, and an interlayer located between the inside surface layer and the outside surface layer, said interlayer being composed of the resin A and another thermoplastic resin having superior gas-barrier properties (resin B) with respect to resin A,
- said interlayer having a multi-layered structure comprising thin layers of the resin A and thin layers of the resin B laminated alternately in the radial direction of the parison wherein part of said thin layers of the resin A and part of said thin layers of the resin B are discontinuous in the circumferential direction and/or the axial direction of the parison, and being formed by injecting the resin A and the resin B through a static mixing-stirring device, which is provided in a nozzle portion of an injection cylinder, or in a mold, or in a resin flow passage between the nozzle portion of the injection cylinder and the mold, so that flows of the resin A and the resin B are divided in a plurality of thin layers of the resin A and thin layers of the resin B parallel to the flowing direction thereof.
- 2. The parison of claim 1 wherein the volume ratio of the resin A to the resin B in said interlayer is from 1:40 to 40:1.
- 3. The parison of claim 1 wherein the resin A is a thermoplastic polyester resin having ethylene therphthalate recurring units as main recurring units.
- 4. The parison of claim 1 wherein the resin B is a m-xylylene group-containing polyamide resin.
- 5. A parison, as a precursor of a container, formed by using an injection-molding machine, comprising
- an open end part of a mouth portion composed of a thermoplastic resin (resin A) and
- parts other than the open end part of the mouth portion comprising an inside surface layer, a middle layer and an outside surface layer which are composed of the resin A, and two interlayers, one of which is located between the inside surface layer and the middle layer and the other of which is located between the middle layer and the outside surface layer, said each interlayer being composed of the resin A and another thermoplastic resin having superior gas-barrier properties (resin B) with respect to resin A,
- said each interlayer having a multi-layered structure comprising thin layers of the resin A and thin layers of the resin B laminated alternately in the radial direction of the parison wherein part of said thin layers of the resin A and part of said thin layers of the resin B are discontinuous in the circumferential direction and/or the axial direction of the parison, and being formed by injecting the resin A and the resin B through a static mixing-stirring device, which is provided in a nozzle portion of an injection cylinder, or in a mold, or in a resin flow passage between the nozzle portion of the injection cylinder and the mold, so that flows of the resin A and the resin B are divided in a plurality of thin layers of the resin A and thin layers of the resin B parallel to the flowing direction thereof.
- 6. The parison of claim 5 wherein the volume ratio of the resin A to the resin B in said each interlayer is from 1:40 to 40:1.
- 7. The parison of claim 5 wherein the resin A is a thermoplastic polyester resin having ethylene terephthalate recurring units as main recurring units.
- 8. The parison of claim 5 wherein the resin B is a m-xylylene group-containing polyamide resin.
- 9. A blow-molded container formed by biaxilly stretching and blow-molding a parison as a precursor of a container, said parison being formed by using an injection-molding machine and said parison comprising
- an open end part of a mouth portion composed of a thermoplastic resin (resin A), and
- parts other than the open end part of the mouth portion comprising an inside surface layer and an outside surface layer which are composed of the resin A, and an interlayer located between the inside surface layer and the outside surface layer, said interlayer being composed of the resin A and another thermoplastic resin having superior gas-barrier properties (resin B) with respect to resin A,
- said interlayer having multi-layered structure comprising thin layers of the resin A and thin layers of the resin B laminated alternately in the radial direction of the parison wherein part of said thin layers of the resin A and part of said thin layers of the resin B are discontinuous in the circumferential direction and/or the axial direction of the parison, and being formed by injecting the resin A and the resin B through a static mixing-stirring device, which is provided in a nozzle portion of an injection cylinder, or in a mold, or in a resin flow passage between the nozzle portion of the injection cylinder and the mold, so that flows of the resin A and the resin B are divided in a plurality of thin layers of the resin A and thin layers of the resin B parallel to the flowing direction thereof.
- 10. The blow-molded container of claim 5 wherein the volume ratio of the resin A to the resin B in said interlayer is from 1:40 to 40:1.
- 11. The blow-molded container of claim 9 wherein the resin A is a thermoplastic polyester resin having ethylene terephthalate recurring units as main recurring units.
- 12. The blow-molded container of claim 9 wherein the resin B is a m-xylylene group-containing polyamide resin.
- 13. A blow-molded container formed by biaxially stretching and blow-molding a parison as a precursor of a container, said parison being formed by using an injection-molding machine and said parison comprising
- an open end part of a mouth portion composed of a thermoplastic resin (resin A), and
- parts other than the open and part of the mouth portion comprising an inside surface layer, a middle layers and an outside surface layer which are composed of the resin A, and two interlayers, one of which is located between the inside surface layers and the middle layer and the other of which is located between the middle layer and the outside surface layer, said each interlayer being composed of the resin A and another thermoplastic resin having superior gas-barrier properties (resin B) with respect to resin A,
- said each interlayer having a multi-layered structure comprising thin layers of the resin A and thin layers of the resin B laminated alternately in the radial direction of the parison wherein part of said thin layers of the resin A and part of said think layers of the resin B are discontinuous in the circumferential direction and/or the axial direction of the parison, and being formed by injecting the resin A and the resin B through a static mixing-stirring device, which is provided in a nozzle portion of an injection cylinder, or in a mold, or in a resin flow passage between the nozzle portion of the injection cylinder and the mold, so that flows of the resin A and the resin B are divided in a plurality of thin layers of the resin A and thin layers of the resin B parallel to the flowing direction thereof.
- 14. The blow-molded container of claim 13 wherein the volume ratio of the resin A to the resin B in said each interlayers is from 1:40 to 40:1.
- 15. The blow-molded container of claim 13 wherein the resin A is a thermoplastic polyester resin having ethylene terephthalate recurring units as main recurring units.
- 16. The blow-molded container of claim 13 wherein the resin B is a m-xylylene group-containing polyamide resin.
Priority Claims (2)
Number |
Date |
Country |
Kind |
62-24768 |
Feb 1987 |
JPX |
|
62-297759 |
Nov 1987 |
JPX |
|
Parent Case Info
This application is a continuation of now abandoned application Ser. No. 150,372 filed on Jan. 29, 1988.
US Referenced Citations (5)
Foreign Referenced Citations (1)
Number |
Date |
Country |
59-229656 |
May 1986 |
JPX |
Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan, vol. 11, No. 135 (M-585) [2582], Apr. 28, 1987, Abstract of JP-A-61 274 912. |
Continuations (1)
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Number |
Date |
Country |
Parent |
150372 |
Jan 1988 |
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