CA1108360A - Microporous protective coverings - Google Patents
Microporous protective coveringsInfo
- Publication number
- CA1108360A CA1108360A CA306,049A CA306049A CA1108360A CA 1108360 A CA1108360 A CA 1108360A CA 306049 A CA306049 A CA 306049A CA 1108360 A CA1108360 A CA 1108360A
- Authority
- CA
- Canada
- Prior art keywords
- film
- range
- suits
- passage
- microporous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/18—Elastic
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
- Y10T156/1056—Perforating lamina
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
- Y10T428/24298—Noncircular aperture [e.g., slit, diamond, rectangular, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/268—Monolayer with structurally defined element
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/269—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension including synthetic resin or polymer layer or component
Abstract
Abstract of the Disclosure A flexible, microporous, non-water soluble, non-skin-toxic film is provided for use in protective garments such as diver's suits, foul weather suits and the like. The film is of a thick-ness in the range of about 12.5µ to 12.5 mm and possesses about 100 to 1000 pores of a diameter in the range of about 2 to 100µ per cm2 of film surface. The porosity of the film permits the passage of body vapours but prevents, at least up to modest external pressures, the counter-passage of water. The film can be of a foamed material to pro-vide increased insulational value.
Description
~ ~t~ 3 Bac~round of the [nvent:Lon The present invention relates to a flexible, microporousnon-water soluble, non-skin-toxic Eilm for use in protective garments such as diver's suits, foul weather suits and the like.
The porosity of the film permits the passage of body vapours but prevents, at least up to modest external pressures, the counter-passage oE water.
Protective garments such as the neoprene foam wet suits used widely in scuba diving do not permit any significant passage o body vapours, with the result that the suits cannot be worn comEortably out of water Eor anything more than short periods of time because of a buildup of perspiration.
Similarly, conventional foul weather suits such as rain suits, which incorporate some form of impermeable barrier material, for example in the form of a rubber lining, cannot comfortably be worn for extended periods of time during warm -~
and/or stress prod~tcing conditions because body vapours accumulate within the confines of the garment and soak all clothing worn under the barrier material.
Summary of ~he Invention It is an object of the present invention to provide a flexible microporous, non-water soluble, non-skin-toxic film for use in protective garments such as diver's suits, foul weather suits and the like which permits the passage of body vapours but which prevents, at least up to modest external pressures, the counter-passage of water.
il/b ~ -2-' 3~
In one particular aspect the present invention providesa flexible, ~licroporous non-water soluble, non-skin-toxic ~ n of a material selected from the group conslsting of natural and syllthetic elastomers and synthetic polymers for use in protective garments, said film having first and second surEaces, a thickness between said surEaces in the range of about 12.5~ to 12.5 mm, and between about 100 to 1000 pores per cm2 of film surface, said pores extending ~-between said surfaces and having a diameter in the range of about 2 to 100~ sa;d pores being tapered and having an average diameter at the firs~ surface of the Eilm of about 2 and an average diameter at the second surface of the film in the range of about 30 to 100~.
Description of the Preferred Embodiments The flexible, microporous film of the present invention ca be fashioned into protective garments such as diver's suits and foul weather suits which are comfortable to wear regardless of the surrounding environment. The film is non-water soluble and non-skin-toxic and may be worn as a primary garment or as a covering over other clothing.
Garments fashioned from the film of the present invention are comfortable to wear regardless of the surrounding environment due to the property of the film of permitting the passage of body vapours through the film to the surrounding environment while preventing :.
, -3-.
3~
at least up to modesc e~ter~al pressures, the counter-passage of water.
This proper~y is attributable to the microporosity of the film. The film contains between about 100 to 1000 pores per cm2 of film surface, th~ pores extending completely through the film and having a diameter in the range of about 2 to 100~l. It is preferred that the pores be tapered such that they have an average diameter at one surface of the film of about 2~ and an average diameter at the other surface of the film in the range of about 30 to 100~. The surface having the smaller average pore diameters is intended for use as the outer surface of lQ garments Eashioned from the film.
The flexible, microporous film of the invention is typically comprised of natural or synthetic elastomeric or synthetic polymeric materials. The materials can be foamed to provlde better insulational value. The thickness of the Eilm is typically in the range of about 12.5~ to 12.5mm.
The Eilm of the invention may be fashioned into garments such as diver's sults or Eoul weather suits by cutting appro-I priately shaped panels out of a sheet of the film and thereafter attach-ing the panels together in a desired configuration by conventional means such as glueing, heat-welding and the like.
~,~ The flexible, microporous film oE the invention, when fashioned into a diver's suit akin to a conventional neoprene foam wetsuit, can be comforably worn out of the water because o~ the pro-perty of the film to permit the passage through the film to the surround-ing environment of body vapours which, otherwise, would acculumate as j perspirat1on. In the water, suits comprised oE the film o~ the present invention act much in the same manner as a conventional wetsuit in that the pores will fill with water due to the surrounding water pressure, but the water will be essentially static and will become warmed b~ body heat _4_ 83~
in the same m~nner as the water trapped in a neoprene foam wets~ilt.
When the flexible, microporous ~ilm of ~he invention ls used in foul weather suits such as rain suits the mlcro-porosity slmilarily permlts the passage of body vapours to the surrounding environment but prevents, at least at normal exte~nal ~! pressures, any counter-passage of water. Wearer comfor~ is thus assured i by preventing undue soaking of clothing worn under the suit by trapped ~j perspiration.
¦ In some instances, for example when the Eilm i8 3 10 used for survival/immersion suits in harsn environments, it is desirable that the film thickness of the garment portlons protecting critical 1 body heat loss areas be greater than the thickness oE other portions of ¦ the garment. This of course can be readily accomplished during garment manufacture by using film of increased thickness, compared to the film employPd for the remainder of the garment, for the panel or panels .~ .
intended to cover critical body heat loss areas such as the groin, chest and neck.
The film of the invention can be prepared by moving a flexible, non-water soluble, non-skin-tQxic film having a 3 20 thickness in the range of about 12.5~ to 12.5 mm past a line of laser sources of selected rod diameter, spacing and repetition rate ~ at a passage speed appropriate to produce the desired microporosity.
-~ The film i5 typically moved past the line oE laser sources in a direction normal to the line of the laser sources.
Other modifications and variations falling within the true broad spirit and scope of the invention will be obvious to those skilled in the art.
The porosity of the film permits the passage of body vapours but prevents, at least up to modest external pressures, the counter-passage oE water.
Protective garments such as the neoprene foam wet suits used widely in scuba diving do not permit any significant passage o body vapours, with the result that the suits cannot be worn comEortably out of water Eor anything more than short periods of time because of a buildup of perspiration.
Similarly, conventional foul weather suits such as rain suits, which incorporate some form of impermeable barrier material, for example in the form of a rubber lining, cannot comfortably be worn for extended periods of time during warm -~
and/or stress prod~tcing conditions because body vapours accumulate within the confines of the garment and soak all clothing worn under the barrier material.
Summary of ~he Invention It is an object of the present invention to provide a flexible microporous, non-water soluble, non-skin-toxic film for use in protective garments such as diver's suits, foul weather suits and the like which permits the passage of body vapours but which prevents, at least up to modest external pressures, the counter-passage of water.
il/b ~ -2-' 3~
In one particular aspect the present invention providesa flexible, ~licroporous non-water soluble, non-skin-toxic ~ n of a material selected from the group conslsting of natural and syllthetic elastomers and synthetic polymers for use in protective garments, said film having first and second surEaces, a thickness between said surEaces in the range of about 12.5~ to 12.5 mm, and between about 100 to 1000 pores per cm2 of film surface, said pores extending ~-between said surfaces and having a diameter in the range of about 2 to 100~ sa;d pores being tapered and having an average diameter at the firs~ surface of the Eilm of about 2 and an average diameter at the second surface of the film in the range of about 30 to 100~.
Description of the Preferred Embodiments The flexible, microporous film of the present invention ca be fashioned into protective garments such as diver's suits and foul weather suits which are comfortable to wear regardless of the surrounding environment. The film is non-water soluble and non-skin-toxic and may be worn as a primary garment or as a covering over other clothing.
Garments fashioned from the film of the present invention are comfortable to wear regardless of the surrounding environment due to the property of the film of permitting the passage of body vapours through the film to the surrounding environment while preventing :.
, -3-.
3~
at least up to modesc e~ter~al pressures, the counter-passage of water.
This proper~y is attributable to the microporosity of the film. The film contains between about 100 to 1000 pores per cm2 of film surface, th~ pores extending completely through the film and having a diameter in the range of about 2 to 100~l. It is preferred that the pores be tapered such that they have an average diameter at one surface of the film of about 2~ and an average diameter at the other surface of the film in the range of about 30 to 100~. The surface having the smaller average pore diameters is intended for use as the outer surface of lQ garments Eashioned from the film.
The flexible, microporous film of the invention is typically comprised of natural or synthetic elastomeric or synthetic polymeric materials. The materials can be foamed to provlde better insulational value. The thickness of the Eilm is typically in the range of about 12.5~ to 12.5mm.
The Eilm of the invention may be fashioned into garments such as diver's sults or Eoul weather suits by cutting appro-I priately shaped panels out of a sheet of the film and thereafter attach-ing the panels together in a desired configuration by conventional means such as glueing, heat-welding and the like.
~,~ The flexible, microporous film oE the invention, when fashioned into a diver's suit akin to a conventional neoprene foam wetsuit, can be comforably worn out of the water because o~ the pro-perty of the film to permit the passage through the film to the surround-ing environment of body vapours which, otherwise, would acculumate as j perspirat1on. In the water, suits comprised oE the film o~ the present invention act much in the same manner as a conventional wetsuit in that the pores will fill with water due to the surrounding water pressure, but the water will be essentially static and will become warmed b~ body heat _4_ 83~
in the same m~nner as the water trapped in a neoprene foam wets~ilt.
When the flexible, microporous ~ilm of ~he invention ls used in foul weather suits such as rain suits the mlcro-porosity slmilarily permlts the passage of body vapours to the surrounding environment but prevents, at least at normal exte~nal ~! pressures, any counter-passage of water. Wearer comfor~ is thus assured i by preventing undue soaking of clothing worn under the suit by trapped ~j perspiration.
¦ In some instances, for example when the Eilm i8 3 10 used for survival/immersion suits in harsn environments, it is desirable that the film thickness of the garment portlons protecting critical 1 body heat loss areas be greater than the thickness oE other portions of ¦ the garment. This of course can be readily accomplished during garment manufacture by using film of increased thickness, compared to the film employPd for the remainder of the garment, for the panel or panels .~ .
intended to cover critical body heat loss areas such as the groin, chest and neck.
The film of the invention can be prepared by moving a flexible, non-water soluble, non-skin-tQxic film having a 3 20 thickness in the range of about 12.5~ to 12.5 mm past a line of laser sources of selected rod diameter, spacing and repetition rate ~ at a passage speed appropriate to produce the desired microporosity.
-~ The film i5 typically moved past the line oE laser sources in a direction normal to the line of the laser sources.
Other modifications and variations falling within the true broad spirit and scope of the invention will be obvious to those skilled in the art.
Claims (2)
OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A flexible, microporous non-water soluble, non skin-toxic film of a material selected from the group consisting of natural and synthetic elastomers and synthetic polymers for use in protective garments, said film having first and second surfaces, a thickness between said surfaces in the range of about 12.5µ to 12.5 mm, and between about 100 to 1000 pores per cm2 of film surface, said pores extending between said surfaces and having a diameter in the range of about 2 to 100µ, said pores being tapered and having an average diameter at the first surface of the film of about 2µ
and an average diameter at the second surface of the film in the range of about 30 to 100µ.
and an average diameter at the second surface of the film in the range of about 30 to 100µ.
2. A microporous film according to Claim 1, wherein the film is of foamed material.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA306,049A CA1108360A (en) | 1978-06-22 | 1978-06-22 | Microporous protective coverings |
| US06/050,297 US4234637A (en) | 1978-06-22 | 1979-06-20 | Microporous protective coverings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA306,049A CA1108360A (en) | 1978-06-22 | 1978-06-22 | Microporous protective coverings |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1108360A true CA1108360A (en) | 1981-09-08 |
Family
ID=4111751
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA306,049A Expired CA1108360A (en) | 1978-06-22 | 1978-06-22 | Microporous protective coverings |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4234637A (en) |
| CA (1) | CA1108360A (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3046127C2 (en) * | 1979-12-14 | 1984-05-30 | Micropore International Ltd., Droitwich, Worcestershire | Method of treating the surface of blocks of microporous thermally insulating material |
| EP0066399A1 (en) * | 1981-05-27 | 1982-12-08 | Anthony Arthur Charles Tillbrook | Protective clothing |
| DE3149878A1 (en) * | 1981-12-16 | 1983-06-23 | W.L.Gore & Co. GmbH, 8011 Putzbrunn | CLOTHING WITH A WATERPROOF AND VAPOR VAPOR-PERMEABLE FUNCTIONAL LAYER |
| US4503565A (en) * | 1983-02-17 | 1985-03-12 | The United States Of America As Represented By The Secretary Of The Navy | Membrane valve for dry diver's apparel |
| US4667344A (en) * | 1984-12-21 | 1987-05-26 | Cooper Iii J Robert | Foul weather garment |
| US5003630A (en) * | 1989-10-23 | 1991-04-02 | David Clark Company Incorporated | Pressure garment |
| US5415924A (en) * | 1993-02-05 | 1995-05-16 | Aquatic Design | Waterproof, breathable fabric for outdoor athletic apparel |
| US5607746A (en) * | 1995-08-14 | 1997-03-04 | Byungnam; Hyun | Cloth for waterproof suits |
| WO2000029167A1 (en) * | 1998-11-16 | 2000-05-25 | Aradigm Corporation | Method of fabricating porous membrane with unique pore structure for aerosolized delivery of drugs |
| US10391736B2 (en) | 2013-06-11 | 2019-08-27 | Chen-Cheng Huang | Breathable and waterproof composite fabric and a method of making the same |
| TWI523757B (en) * | 2013-06-11 | 2016-03-01 | zhen-zheng Huang | Breathable waterproof composite cloth |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3226527A (en) * | 1963-10-23 | 1965-12-28 | William H Harding | Apparatus for perforating sheet material |
| US3695988A (en) * | 1965-12-10 | 1972-10-03 | Karl Heinz Steigerwald | Laminated imitation leather |
| US3594261A (en) * | 1968-11-22 | 1971-07-20 | Phillips Petroleum Co | Nonwoven fabric and method of manufacturing same by perforating a thermoplastic sheet with a laser beam |
| US3725190A (en) * | 1971-03-31 | 1973-04-03 | Schick Electric Inc | Pad finger grip for electric shaver case |
| US3770560A (en) * | 1971-10-21 | 1973-11-06 | American Cyanamid Co | Composite laminate with a thin, perforated outer layer and cavitated bonded backing member |
| US4032743A (en) * | 1975-06-27 | 1977-06-28 | Marvel Engineering Company | Laser microperforator |
-
1978
- 1978-06-22 CA CA306,049A patent/CA1108360A/en not_active Expired
-
1979
- 1979-06-20 US US06/050,297 patent/US4234637A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| US4234637A (en) | 1980-11-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |