IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0948643
(2001-09-07)
|
|
발명자
/ 주소 |
- Martin, Frederick H.
- Porchia, Jose
- Grissmeyer, Julie M.
|
| 출원인 / 주소 |
- S. C. Johnson Home Storage, Inc.
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| 인용정보 |
피인용 횟수 :
4 인용 특허 :
171 |
초록
▼
A method of producing an electrically charged film includes the steps of forming a molten thermoplastic material into a web, electrically charging the web while the web is at a temperature substantially at or above a solidification temperature thereof, cooling the web below the solidification temper
A method of producing an electrically charged film includes the steps of forming a molten thermoplastic material into a web, electrically charging the web while the web is at a temperature substantially at or above a solidification temperature thereof, cooling the web below the solidification temperature thereof after charging and winding the web into individual rolls immediately following the cooling step.
대표청구항
▼
1. A method of producing an electrically charged film, the method comprising the steps of:forming a molten thermoplastic material into a web; electrically charging the web while the web is at a temperature above a solidification temperature thereof; cooling the web below the solidification temperatu
1. A method of producing an electrically charged film, the method comprising the steps of:forming a molten thermoplastic material into a web; electrically charging the web while the web is at a temperature above a solidification temperature thereof; cooling the web below the solidification temperature thereof after charging; winding the web into individual user rolls immediately following the cooling step; and placing each individual user roll into a user box to obtain a plurality of boxes of charged film rolls. 2. The method of claim 1, wherein the charge applied to the web during the step of charging results in a web that retains sufficient charge to develop at least 1500 volts at three months following the step of charging.3. The method of claim 1, wherein the charge applied to the web during the step of charging results in a web that retains sufficient charge to develop at least 2500 volts.4. The method of claim 1, wherein the charge applied to the web during the step of charging results in a web that retains sufficient charge to develop at least 3500 volts.5. The method of claim 4, wherein the step of charging comprises the step of passing the web through an electrostatic charging machine to electrostatically charge the web.6. The method of claim 5, wherein the electrostatic charging machine applies an electric field of greater than 25,000 volts to the web.7. The method of claim 6, wherein the electrostatic charging machine applies the electric field at an approximate distance of between ½ inch and 1 inch.8. The method of claim 6, wherein the electrostatic charging machine applies the electric field at an approximate distance of ¾ inch.9. The method of claim 6, wherein the electrostatic charging machine applies an electric field substantially greater than 25,000 volts to the web.10. The method of claim 9, wherein the electrostatic charging machine applies the electric field at an approximate distance of between ½ inch and 1 inch.11. The method of claim 9, wherein the electrostatic charging machine applies the electric field at an approximate distance of ¾ inch.12. The method of claim 9, wherein the electrostatic charging machine applies an electric field of at least approximately 30,000 volts to the web.13. The method of claim 12, wherein the electrostatic charging machine applies the electric field at an approximate distance of between ½ inch and 1 inch.14. The method of claim 12, wherein the electrostatic charging machine applies the electric field at an approximate distance of ¾ inch.15. The method of claim 1, wherein the charge applied to the web during the step of charging results in a web having a moderate to high resistance to shear forces but which can be readily peeled from a surface.16. The method of claim 1, wherein the step of forming comprises the step of extruding the thermoplastic material.17. A method of producing an electrically charged film, the method comprising the steps of:extruding a molten thermoplastic material into a web, wherein the web includes a surface adapted for marking by a marking device; electrically charging the web while the web is at a temperature above a solidification temperature thereof; cooling the web below the solidification temperature thereof after charging; and winding the web onto one of a plurality of rolls disposed on a rotatable turret immediately following the cooling step; wherein the step of charging results in a web having a moderate to high resistance to shear forces but which can be readily peeled from a surface. 18. The method of claim 17, wherein the charge applied to the web during the step of charging results in a web that retains sufficient charge to develop at least 1500 volts at three months following the step of charging.19. The method of claim 17, wherein the charge applied to the web during the step of charging results in a web that retains sufficient charge to develop at least 2500 volts.20. The method of claim 17, wherein the charge applied to the web during the step of charging results in a web that retains sufficient charge to develop at least 3500 volts.21. The method of claim 20, wherein the step of charging comprises the step of passing the web through an electrostatic charging machine to electrostatically charge the web.22. The method of claim 21, wherein the electrostatic charging machine applies an electric field of greater than 25,000 volts to the web.23. The method of claim 22, wherein the electrostatic charging machine applies the electric field at an approximate distance of between ½ inch and 1 inch.24. The method of claim 22, wherein the electrostatic charging machine applies the electric field at an approximate distance of ¾ inch.25. The method of claim 22, wherein the electrostatic charging machine applies an electric field of substantially greater than 25,000 volts to the web.26. The method of claim 25, wherein the electrostatic charging machine applies the electric field at an approximate distance of between ½ inch and 1 inch.27. The method of claim 25, wherein the electrostatic charging machine applies the electric field at an approximate distance of ¾ inch.28. The method of claim 25, wherein the electrostatic charging machine applies an electric field of at least approximately 30,000 volts to the web.29. The method of claim 28, wherein the electrostatic charging machine applies the electric field at an approximate distance of between ½ inch and 1 inch.30. The method of claim 28, wherein the electrostatic charging machine applies the electric field at an approximate distance of ¾ inch.31. The method of claim 17, wherein the charge applied to the web during the step of charging results in a web having a moderate to high resistance to shear forces but which can be readily peeled from a surface.32. The method of claim 17, wherein the step of forming comprises the step of extruding the thermoplastic material.
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