Claims
- 1. A container body for a photographic film cartridge having a peripheral wall portion and a bottom portion, said container body being composed of more than 70wt. % of a propylene-ethylene random copolymer resin having an ethylene content of 1 to 5 wt. %, said propylene-ethylene random copolymer resin having a melt index of 10 to 60 g/10 minutes, a notched Izod impact strength at 23.degree. C. of more than 2.0 kg.multidot.cm/cm, and a bending elastic modulus of more than 9,000 kg/cm.sup.2 and containing at least 0.005 to 0.3 wt. % of a fatty acid amide lubricant and 0.005 to 0.6 wt. % of a surfactant lubricant different from said fatty acid amide lubricant and the sum of both lubricants being 0.01 to 0.9 wt. %, wherein the Rockwell hardness of the bottom portion is not less than 85 R.
- 2. The container body of claim 1 which contains 0.01 to 1 wt. % of an organic nucleating agent of a dibenzylidene-sorbitol compound and 0.01 to 1 wt. % of an antioxidant.
- 3. A container body for a photographic film cartridge, said container body having a peripheral wall portion and a bottom portion wherein the bottom portion has a gate mark portion, said container body consisting essentially of a polyolefin resin having a melt index of 10 to 60 g/10 minutes, a notched Izod impact strength at 23.degree. C. of more than 2.0 kg.multidot.cm/cm, and a bending elastic modulus of more than 9,000 kg/cm.sup.2 wherein the gate mark portion is thicker by 10 to 100 % than the neighboring portions of the bottom portion and wherein the bottom portion has a Rockwell hardness of more than 80 R.
- 4. The container body of claim 3 wherein the thickness of the gate mark portion is thicker than the neighboring portions of the bottom by 30 to 100 %.
- 5. The container body of claim 3 wherein the container body comprises a thermoplastic resin selected from homopolypropylene resin, propylene-.alpha.-olefin random copolymer resin, propylene-.alpha.-olefin block copolymer resin, high density polyethylene resin, high impact polystyrene resin containing synthetic rubber, blends thereof, and blends of said resins with at least one polyolefin resin.
- 6. The container body of claim 3 which contains more than 70 wt. % of propylene-ethylene copolymer resin having a MI of 20 to 45 g/10 minutes, a notched Izod impact strength at 23.degree. C. of more than 2.5 kg.multidot.cm/cm and a Rockwell hardness of more than 80 R, and which contains at least one of a lubricant and a surfactant.
- 7. A container body for a photographic film cartridge, said container body having a peripheral wall portion and a bottom portion wherein the bottom portion has a gate mark portion comprised of a thermoplastic resin wherein the gate mark portion is thicker than the neighboring portions of the bottom portion, wherein the bottom portion has a Rockwell hardness of more than 55 R and which contains more than 70 wt. % of propylene-ethylene copolymer resin having a MI of 20 to 45 g/10 minutes, a bending elastic modulus of more than 8,000 kg/cm.sup.2, a notched Izod impact strength at 23.degree. C. of more than 2.5 kg cm/cm, and Rockwell hardness of more than 80 R, and which contains at least one of a lubricant and a surfactant.
- 8. A container body for a photographic film cartridge, said container body having a peripheral wall portion and a bottom portion and being made of a thermoplastic resin composition containing high density polyethylene resin having a melt index of 10 to 60 g/10 minutes, a notched Izod impact strength at 23.degree. C. of more than 2.0 kg.multidot.cm/cm, and a bending elastic modulus of more than 9,000 kg/cm.sup.2, more than 0.001 wt. % of lubricant and more than 0.01 wt. % of antistatic agent, wherein the bottom portion is 0.5 to 1.3 mm in average thickness and is more than 55 R in Rockwell hardness.
- 9. The container body for a photographic film cartridge of claim 8 wherein the thermoplastic resin composition contains more than 0.01 wt. % of a dibenzylidene sorbitol compound.
- 10. A container body for a photographic film cartridge, said container body having a peripheral wall portion and a bottom portion and being made of a thermoplastic resin composition containing a member having a melt index of 10 to 60 g/10 minutes, a bending elastic modulus of more than 9000 kg/cm.sup.2, a notched Izod impact strength at 23.degree. C. of more than 2.0 kg cm/cm and being selected from the group consisting of high density polyethylene resin or high impact polystyrene resin containing synthetic rubber and blends of said resins, more than 0.001 wt. % of lubricant and more than 0.01 wt. % of antioxidant agent, wherein the bottom portion and the peripheral wall portion are 0.5 to 1.3 mm in average thickness and wherein the bottom portion is more than 55 R in Rockwell hardness.
- 11. The container body for a photographic film cartridge of claim 10 wherein the thermoplastic resin composition contains more than 0.01 wt. % of a dibenzylidene sorbitol compound.
- 12. A container body for a photographic film cartridge, said container body having a peripheral wall portion and a bottom portion and being made of polyolefin resin composition having a melt index of 10 to 60 g/10 minutes and a bending elastic modulus of more than 9,000 kg/cm.sup.2 and containing a member selected from the group consisting of middle density polyethylene resin, high density polyethylene resin or ethylene .alpha.-olefin copolymer resin, more than 0.001 wt. % of lubricant, surfactant or coupling agent and 0.01 to 1.0 wt. % of antioxidant, wherein the notched Izod impact strength at 23.degree. C. is more than 2.0 kg.multidot.cm/cm, the bottom portion and the peripheral wall portion are 0.5 to 1.3 mm in average thickness, and the Rockwell hardness is more than 55 R.
- 13. The container body for a photographic film cartridge of claim 12 wherein the polyolefin resin composition contains 0.01 to 1.0 wt. % sorbitol compound.
- 14. A container body for a photographic film cartridge, said container body having a peripheral wall portion and a bottom portion and being made of a thermoplastic resin composition consisting essentially of high density polyethylene resin or ethylene-.alpha.-olefin copolymer resin, said high density polyethylene resin or said ethylene-.alpha.-olefin copolymer resin having a melt index of 10 to 60 g/10 minutes, a notched Izod impact strength at 23.degree. C. of more than 2.0 kg.multidot.cm/cm, and a bending elastic modulus of more than 9,000 kg/cm.sup.2, wherein the bottom portion is more than 55 R in Rockwell hardness.
- 15. The container body for a photographic film of claim 14 wherein the thermoplastic resin composition contains at least one of a lubricant and a surfactant.
- 16. The container body for a photographic film of claim 14 wherein the thermoplastic resin composition contains 0.01 to 1 wt. % of an antioxidant.
- 17. The container body for a photographic film of claim 14 wherein the thermoplastic resin composition contains 0.01 to 2 wt. % of a dibenzylidene sorbitol compound.
- 18. The container body for a photographic film of claim 17 wherein the bottom portion is 0.5 to 1.3 mm in average and the peripheral wall portion is 0.5 to 1.3 mm in average.
- 19. The container body for a photographic film of claim 14 wherein the bottom portion is 0.5 to 1.3 mm in average and the peripheral wall portion is 0.5 to 1.3 mm in average.
- 20. The container body for a photographic film of claim 15 wherein the bottom portion is 0.5 to 1.3 mm in average and the peripheral wail portion is 0.5 to 1.3 mm in average.
- 21. The container body for a photographic film of claim 16 wherein the bottom portion is 0.5 to 1.3 mm in average and the peripheral wall portion is 0.5 to 1.3 mm in average.
Priority Claims (5)
Number |
Date |
Country |
Kind |
1-35072 |
Feb 1989 |
JPX |
|
1-41770 |
Feb 1989 |
JPX |
|
1-20138 |
Feb 1989 |
JPX |
|
1-68771 |
Mar 1989 |
JPX |
|
1-71173 |
Jun 1989 |
JPX |
|
Parent Case Info
This application is a continuation of application Ser. No. 07/480,797, filed Feb. 16, 1990; U.S. Pat. No. 5,106,665.
Foreign Referenced Citations (5)
Number |
Date |
Country |
0039739 |
Nov 1979 |
EPX |
61-73947 |
Apr 1986 |
JPX |
62-145242 |
Jun 1987 |
JPX |
62-26061 |
Aug 1988 |
JPX |
63-193142 |
Aug 1988 |
JPX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
480797 |
Feb 1990 |
|