WO2000061239A1 - Perforated protective plastic films or sheets - Google Patents
Perforated protective plastic films or sheets Download PDFInfo
- Publication number
- WO2000061239A1 WO2000061239A1 PCT/CA2000/000401 CA0000401W WO0061239A1 WO 2000061239 A1 WO2000061239 A1 WO 2000061239A1 CA 0000401 W CA0000401 W CA 0000401W WO 0061239 A1 WO0061239 A1 WO 0061239A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- layer
- titanium
- sheet
- perforations
- emergency equipment
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
- A62B17/00—Protective clothing affording protection against heat or harmful chemical agents or for use at high altitudes
- A62B17/003—Fire-resistant or fire-fighters' clothes
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62D—CHEMICAL MEANS FOR EXTINGUISHING FIRES OR FOR COMBATING OR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
- A62D5/00—Composition of materials for coverings or clothing affording protection against harmful chemical agents
Definitions
- This invention relates to perforated protective plastic films or sheets, and it particular, to protective films or sheets for protecting individuals from smoke, heat, open flame, corrosive chemicals, etc. in the cases of emergency.
- Such protective equipment is typically made of heat resistant fibers.
- the fibers are coated with a metal layer, metallized ink or metal filled polymer to reflect thermal radiation and reduce heat absorption.
- Such coatings may include gold, silver or aluminum.
- these metal coatings tend to be dislodged from the underlying fabric.
- corrosive gases or liquids may attack these metal coatings, thus losing their protective properties.
- some fabrics cannot be provided with a uniform coating of metal.
- metal coatings tend to be very heavy, and they are impervious to water vapour and do not "breathe".
- Canadian Patent No. 1333950 discloses a fire and smoke protective hood and also garments and shields that comprise a high temperature resistant plastic material having a layer of titanium.
- the plastic material is preferably a polyimide, for example Kapton (a trade-mark).
- the layer of titanium is preferably sufficiently thick to provide the required heat reflection and transmission properties.
- the titanium may be a layer of several hundred angstroms thick, for example, from 100 to 1000 angstroms thick.
- bunker gear made with the material of the prior art is both heavy and bulky.
- a firefighter requires a lot of mobility and flexibility while performing operations at fires, accidents and other emergency operations. It is desirable, therefore, to provide equipment that is relatively lightweight, but that also provides the necessary protection and breathability.
- a protective plastic film or sheet for use in protecting against smoke, heat, corrosive liquids and other hazardous elements comprising:
- a fire resistant substrate layer having a primary surface
- emergency equipment for use by firefighters or other emergency personnel to protect against smoke, heat, corrosive liquids and other hazardous elements
- the emergency equipment comprising a protective film or sheet comprising:
- a fire resistant substrate layer having a primary surface
- Fig. 1 is a partial cross-sectional view of one embodiment of a film or sheet of the present invention
- Fig. 2 is a partial view of a film or sheet of Fig. 1 coated on one side with a layer of permeable fabric;
- Fig. 3 is a partial view of a film or sheet of Fig. 1 coated on another side with a layer of permeable fabric;
- Fig. 4 is a partial view of a film or sheet of Fig. 1 coated on both sides with a layer of permeable fabric.
- perforated plastic films or sheets are provided for making fire protective equipment or other emergency equipment that allow for "breathability".
- the perforated films or sheets 10 comprise a heat resistant plastic substrate layer 12 perforated with holes 14 of sufficient size to allow water vapor to pass through the perforations 14, but of small enough size to prevent liquids such as water or corrosive chemicals to pass through the perforations 14.
- the films or sheets 10 retain the protective properties of the prior art films by being substantially impermeable to liquids; however, they allow water vapor to escape there through.
- the films or sheets 10 may preferably be coated with a layer of titanium 16 to make the films or sheets 10 more resistant to heat, smoke, corrosive chemicals, etc.
- the perforations 14 make the films or sheets 10 more breathable therefore allowing the users, such as firefighters and other emergency personnel, to carry out their duties without risk of encountering the problems faced with the protective material of the prior art.
- the perforations 14 may be made by any known means such as, but not limited to, mechanical perforating devices, electrostatic discharge, laser impingement, etc. These perforations 14 can range in diameter from fractions of a micron to tens of microns. Smaller perforations provide maximum protection to the user from harmful gases and liquids while still allowing the escape or release of water vapor through the perforations 14. Preferably, the perforations 14 should extend completely through the various layers of the films or sheets 10.
- the substrate plastic layer 12 of the film or sheet 10 preferably has a thickness between 25 and 75 microns.
- the layer 12 is preferably made from, but not limited to, a thermoset plastics material such as a heat and chemical resistant polyimide film (such as Kapton® polyimide available from E.I. du Pont of Wilmington Delaware).
- This layer 12 acts as the substrate for the titanium layer 16.
- Kapton® polyimide, and other polyimide films provide additional thermal, burn-through, chemical (gas and liquid), pathogen and electrical resistance to the film or sheet 10.
- the polyimide layer 12 allows the titanium coating 16 to be applied with maximum reflectivity, unlike the case found with other substrate fabrics that allow only a discontinuous coating of titanium to be placed on them.
- the titanium layer 16 can be applied to one or both surfaces 18 and 20 of the plastic layer 12.
- the titanium layer 16 is illustrated as covering a major portion of one surface 18 only, but the present invention is not limited in such a way.
- the titanium layer 16 may be applied to both surfaces 18 and 20 of the plastic layer 12 by various known processes such as, but not restricted to, "sputtering", “vacuum metallization', and lamination.
- the titanium layer 16 may be applied in thicknesses ranging from 100 to 1000 angstroms, although it will be understood that useful thicknesses may not necessarily be restricted to this range so long as the titanium layer 16 provides the desired protection.
- Some of the desired properties of the titanium layer 16 include, but are not restricted to the following:
- the titanium layer 16 reflects radiant heat whether the titanium is coated as a layer on the plastic layer 12 or whether it is buried or embedded into the construction of the plastic layer 12;
- the titanium layer 16 is heat resistant at temperatures at or above those encountered in firefighting and other emergency situations; and - the titanium layer 16 is resistant to many corrosive liquids and gases thereby maintaining its integrity as a reflective layer when exposed to such environments, unlike the case with aluminum and other metals commonly used to metallize plastics.
- the titanium layer 16 may be coated onto one or both surfaces of the plastic layer 12, or alternatively, it may be embedded within the structure of the plastic layer 12. Further, the titanium layer 16 may only be coated or embedded on a portion of the plastic layer 12, but preferably, the whole surface of the plastic layer 12 is coated with a titanium layer 16.
- the perforated titanium coated plastic film or sheet 10 may be used with or without an additional layer of fabric 21 applied to either the titanium layer 16 or to surface 20 of the plastic layer 12.
- the titanium layer 16 and/or the plastic layer 12 may also be coated with or laminated to a permeable fabric layer 21 as shown in Figures 2, 3 and 4.
- the permeable fabric layer 21 is coated over the titanium layer 16, whereas in the embodiment of Fig. 3, the fabric layer 21 is coated on the plastic layer 12.
- the film or sheet comprises two permeable fabric layers 21 and 21a; one fabric layer 21 on the titanium layer 16 and another fabric layer 21a on the plastic layer 12.
- Common fabrics that may be additionally used include, but are not limited to aramids (such as Nomex® available from E.I. du Pont of Wilmington Delaware) that provides additional resistance to conductive and convective heat transfer and also functions to provide additional tear and puncture resistance to the overall film or sheet 10.
- aramids such as Nomex® available from E.I. du Pont of Wilmington Delaware
- the combination of the attributes of the perforated titanium coated film or sheet 10 of the present invention and the optional fibrous backing material allows the use of lighter weight insulation in the final equipment while providing significantly improved levels of protection for the user.
- the microscopic perforations 14 allow the escape of moisture vapor from inside the equipment while providing protection against exposure to smoke, heat, corrosive chemicals etc. encountered in fires and other emergency situations.
Landscapes
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- General Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002367502A CA2367502A1 (en) | 1999-04-13 | 2000-04-11 | Perforated protective plastic films or sheets |
AU38002/00A AU3800200A (en) | 1999-04-13 | 2000-04-11 | Perforated protective plastic films or sheets |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US12892799P | 1999-04-13 | 1999-04-13 | |
US60/128,927 | 1999-04-13 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2000061239A1 true WO2000061239A1 (en) | 2000-10-19 |
WO2000061239B1 WO2000061239B1 (en) | 2001-01-11 |
Family
ID=22437660
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/CA2000/000401 WO2000061239A1 (en) | 1999-04-13 | 2000-04-11 | Perforated protective plastic films or sheets |
Country Status (3)
Country | Link |
---|---|
AU (1) | AU3800200A (en) |
CA (1) | CA2367502A1 (en) |
WO (1) | WO2000061239A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6931665B2 (en) | 2001-07-30 | 2005-08-23 | 3M Innovative Properties Company | Vapor permeable retroreflective garment |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60155445A (en) * | 1984-01-26 | 1985-08-15 | 日本毛織株式会社 | Special cloth |
FR2612948A3 (en) * | 1987-03-23 | 1988-09-30 | Chavanne Paul Edouard | Self-contained accessories, in particular of an isothermal clothing nature |
EP0348052A2 (en) * | 1988-06-22 | 1989-12-27 | The British Petroleum Company p.l.c. | Fire and smoke protective hood |
GB2277016A (en) * | 1993-04-13 | 1994-10-19 | Nicholas John Mills | Thermal coverings |
JPH09257395A (en) * | 1996-03-19 | 1997-10-03 | New Gutsuzu Kk | Body protecting wear |
RU2105517C1 (en) * | 1995-11-20 | 1998-02-27 | Голуб Валерий Иосифович | Material for protection against heat effect and effect of corrosive liquids |
RU2105516C1 (en) * | 1995-11-20 | 1998-02-27 | Голуб Валерий Иосифович | Material for protection against heat effect and effect of corrosive liquids |
-
2000
- 2000-04-11 AU AU38002/00A patent/AU3800200A/en not_active Abandoned
- 2000-04-11 WO PCT/CA2000/000401 patent/WO2000061239A1/en active Application Filing
- 2000-04-11 CA CA002367502A patent/CA2367502A1/en not_active Abandoned
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60155445A (en) * | 1984-01-26 | 1985-08-15 | 日本毛織株式会社 | Special cloth |
FR2612948A3 (en) * | 1987-03-23 | 1988-09-30 | Chavanne Paul Edouard | Self-contained accessories, in particular of an isothermal clothing nature |
EP0348052A2 (en) * | 1988-06-22 | 1989-12-27 | The British Petroleum Company p.l.c. | Fire and smoke protective hood |
GB2277016A (en) * | 1993-04-13 | 1994-10-19 | Nicholas John Mills | Thermal coverings |
RU2105517C1 (en) * | 1995-11-20 | 1998-02-27 | Голуб Валерий Иосифович | Material for protection against heat effect and effect of corrosive liquids |
RU2105516C1 (en) * | 1995-11-20 | 1998-02-27 | Голуб Валерий Иосифович | Material for protection against heat effect and effect of corrosive liquids |
JPH09257395A (en) * | 1996-03-19 | 1997-10-03 | New Gutsuzu Kk | Body protecting wear |
Non-Patent Citations (4)
Title |
---|
DATABASE WPI Section Ch Week 198539, Derwent World Patents Index; Class A23, AN 1985-239459, XP002146460 * |
DATABASE WPI Section Ch Week 199841, Derwent World Patents Index; Class A83, AN 1998-479488, XP002146459 * |
DATABASE WPI Section Ch Week 199841, Derwent World Patents Index; Class A83, AN 1998-479489, XP002146458 * |
PATENT ABSTRACTS OF JAPAN vol. 1998, no. 02 30 January 1998 (1998-01-30) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6931665B2 (en) | 2001-07-30 | 2005-08-23 | 3M Innovative Properties Company | Vapor permeable retroreflective garment |
US7107622B2 (en) | 2001-07-30 | 2006-09-19 | 3M Innovative Properties Company | Vapor permeable retroreflective garment |
US7600269B2 (en) | 2001-07-30 | 2009-10-13 | 3M Innovative Properties Company | Vapor permeable retroreflective garment |
US8015620B2 (en) | 2001-07-30 | 2011-09-13 | 3M Innovative Properties Company | Vapor permeable retroreflective garment |
US8256025B2 (en) | 2001-07-30 | 2012-09-04 | 3M Innovative Properties Company | Vapor permeable retroreflective garment |
Also Published As
Publication number | Publication date |
---|---|
WO2000061239B1 (en) | 2001-01-11 |
CA2367502A1 (en) | 2000-10-19 |
AU3800200A (en) | 2000-11-14 |
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