WO1994027648A1 - Water repellent orthopedic dressing - Google Patents
Water repellent orthopedic dressing Download PDFInfo
- Publication number
- WO1994027648A1 WO1994027648A1 PCT/US1994/005417 US9405417W WO9427648A1 WO 1994027648 A1 WO1994027648 A1 WO 1994027648A1 US 9405417 W US9405417 W US 9405417W WO 9427648 A1 WO9427648 A1 WO 9427648A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- dressing
- padding
- fibers
- fabric
- oxazolidinone
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/07—Stiffening bandages
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/35—Heterocyclic compounds having nitrogen in the ring having also oxygen in the ring
- C08K5/353—Five-membered rings
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/02—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F6/04—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins
- D01F6/06—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolymers obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyolefins from polypropylene
Definitions
- the present invention generally relates to medical dressings and particularly relates to orthopedic dressings, such as padding and stockinettes, which are used with casting material.
- the dressings of the present invention are especially useful when in contact with skin because the dressings are water repellent and soil resistant but allow air and vapor to pass through the dressings. Processes to prepare the materials used to make the dressings of this invention are described in the copending U.S. patent application Serial Number 07/703,038 filed May 17, 1991 which is incorporated by reference herein.
- the present invention provides a water repellent orthopedic dressing.
- the dressing is made from a soft, smooth, conformable, air-permeable, hydrophobic fabric.
- the fabric contains polymeric fibers of an extruded blend of thermoplastic polymer and a fluorochemical oxazolidinone. These extruded fibers may be used to make a nonwoven fabric which is particularly suited for use in cast or splint padding. Alternatively, the fibers may be spun into yarns which may be used to make knitted or woven fabrics. A knitted fabric made from the extruded fibers is particularly suited for use in stockinettes and tubular stockinettes.
- the dressings made of the present extruded fibers are significantly softer, smoother and more conformable when compared to similar dressing that are surface only treated with water repellent materials such as fluorochemicals as described in U.S. Patent 4,989,593.
- the enhanced tactile properties of the present dressings provide water repellent fabrics which may be in direct contact with a patient's skin and provide both increased comfort to the patient and reduced irritation to the skin.
- the processability and/or performance of the extruded fibers may be enhanced by surface treating or coating the fibers with a hydrophilic antistatic lubricant and a fluorochemical water repellent.
- the hydrophilic lubricant aids processing of the fibers while the fluorochemical water repellent gives improved initial water resistance.
- thermoplastic polymers which are used to make the present fibers include polyethylene, polypropylene and polyesters such as polyethylene terephthalate as well as blends or copolymers thereof. Particularly preferred polymers melt at sufficiently low temperatures to allow melt blending of the polymer with a fluorochemical oxazolidinone without degradation of the oxazolidinone.
- Alternative polymers include low melting non-reactive compatible polymers.
- Polyethylene and polypropylene are presently most preferred polymers.
- Suitable oxazolidinones are described in U.S. Patents 5,025,052 and 5,099,026, which are incorporated by reference herein.
- a preferred fluorochemical oxazolidinone (available from 3M, St. Paul, MN) is schematically represented by the formula
- This preferred oxazolidinone (referred to herein as ODOX) is prepared according to reported methods. Briefly, a perfluoroalkylsulfonamide, C 8 F 17 SO 2 N(CH 3 )H, is reacted with epichlorohydrin to provide the chlorohydrin, C 8 F 17 SO 2 N(CH 3 )CH 2 CH(CH 2 Cl)OH. The chlorohydrin is then reacted with an octadecylisocyanate, C ⁇ 8 H 37 NCO, to provide an intermediate urethane which cyclizes in the presence of base to provide the oxazolidinone listed above.
- the polymer and fluorochemical oxazolidinone are melt blended and then extruded into fibers using known apparatus and processes to provide fibers having between about 0.1-10.0 wt. % oxazolidinone, and more preferably between about 0.3-3.0 wt. % oxazolidinone. These fibers may then be used to prepare nonwoven, woven or knitted fabrics using known procedures.
- extruded fibers which have been crimped and oven-dried may be coated with a mixture of antistatic lubricant and fluorochemical water repellent and then cut into staple fibers to be used to prepare nonwoven, woven or knitted fabrics using known procedures.
- Orthopedic casts and splints may be made from a water curable resin impregnated casting material that is used in combination with a soft layer of padding applied between the load-bearing casting material and a patient's skin.
- the padding is used to provide cushioning and protection to the skin and is preferred to be comfortable, easy to apply, non-irritating as well as quick drying.
- a cast is made, generally a stretchy knit tubular stockinette is applied over a patient's limb, a padding is then wrapped over the stockinette, and the casting material is then applied over the cast padding.
- a layer of padding alone is typically used..
- Water Repellent means the ability of a fabric to cause water to bead or be repelled from a surface as well as causing water which is mechanically or otherwise forced into the fabric to readily run out, leach out or be removed from the interstices of the fabric.
- Conformability means the ability of a fabric to easily or readily deform around an object. A quantitative measure of conformability is provided by the HANDLE-O-METER stiffness test set out in Example 2, below.
- “Smooth” means the tactile feel or texture of the surface and may be comparatively measured using a surface friction test set out in Example 3, below.
- “Soft” means the subjective tactile sensation of the fabric on the skin. Comparative softness of the present invention in relation to other water repellent fabrics or dressings is described in Example 4, below.
- Hydrophobic is a measure of the ability of the fabric to hold or absorb water on the fabric surface.
- a measure of hydrophobicity is provided by a measurement of a material's surface energy which is readily determined using the modified AATCC Test Method 118-1983 set out in U.S. Patent 5,027,803.
- Preferred dressings of this invention have surface energies less than about 40 erg/cm 2 and more preferably less than about 30 erg/cm 2 .
- Suitable fluorochemical water repellents for use in the present invention are those used in the manufacture of textile articles.
- textile articles such as carpet and apparel, or for example, other fibrous substrates such as paper and leather
- fluorochemicals to impart oil and water repellency to the surface of such materials.
- Suitable fluorochemicals for this use and their application to fibrous substrates are described in various publications, e.g., U.S. Patent Nos.
- the preferred fluorochemical water repellent is SCOTCHGARD brand carpet protector (FC-359) an aqueous emulsion of a fluorinated polycarbodiimide of the type described in U.S. Patent 4,560,487, a fluorinated emulsifier, CH 3 I
- Suitable hydrophilic lubricant antistatic agents for use in the invention are any such agents conventionally used in the fiber industry such as
- a polypropylene/oxazolidinone concentrate was made using a 40 mm twin screw extruder (Bestorff, Charlotte, NC) from virgin polypropylene (90 wt. % polypropylene, #3661-Fiber Grade, Fina Oil & Chemical Co., Dallas, TX) and a fluorochemical oxazolidinone (10 wt. % oxazolidinone, ODOX described above, Protective Chemicals Division, 3M, St. Paul, MN).
- the resulting polypropylene/oxazolidinone concentrate (10 wt. %) was metered into a 160 mm barrier-type double flight extruder with additional polypropylene (90 wt.
- This measurement provides an index of the amount of fluorine present on a fiber.
- organic fluorine is converted to inorganic fluoride ion by burning a test sample in a sealed polycarbonate flask, via an electronic ignition system, in the presence of oxygen and a known volume of deionized water.
- the inorganic fluoride ion is absorbed into the water.
- the fluoride ion is measured using a fluoride ion specific electrode, Model #94-09 Fluoride Ion Electron commercially available from Orion Research Inc., Boston, MA.
- the shorter 3.81 cm extruded fibers were then processed into nonwoven cast padding using standard methods by Astro-Form Corporation, Danielson, CT, using commercially available Randoweb Equipment. Padding rolls 7.62 cm and 10.16 cm wide were also prepared and evaluated.
- the extruded polypropylene/oxazolidinone fiber padding had a lower than normal, compared to untreated polyester padding (Synthetic Cast Padding, MW 03, 3M, St. Paul, MN), tear strength as determined by manually tearing the fabric presumably because of the fiber length.
- the coextruded padding was very soft, conformable and had a very good resistance to water.
- the yam was then knitted into stockinette rolls 5.08 cm and 7.62 cm wide by
- the polypropylene/oxazolidinone stockinette was also very soft, conformable and had a very good resistance to water.
- This test measured the stiffness or hand of a nonwoven fabric.
- Conformable fabrics were more flexible and less stiff when compared to fabrics which were not as conformable.
- the nonwoven material was deformed through a restricted opening using a plunger and the force required to do this was measured using the INDA
- Surface treated padding was prepared using standard polyester padding (Synthetic Cast Padding, MW 03, 3M, St. Paul, MN) that was dipped in a 2 wt. % aqueous fluorochemical solution (FC-270 fluorochemical water repellent, 3M, St. Paul, MN). The excess fluorochemical solution was removed by wringing between two rollers and the surface treated padding was then dried in an oven at 65.6°C for about 24 hours.
- Untreated polyester padding was a commercially available standard polyester padding (Synthetic Cast Padding, MW 03, 3M, St. Paul, MN).
- This test measured the surface friction of a sample which may be used to evaluate the feel of the fabric.
- the test involves pulling a stainless steel boat covered with TRANSPORE tape (3M, St. Paul, MN) across a surface of the sample and measuring the force required to move the boat. The more force required to move the boat across the sample, the greater the surface friction of the sample. The requisite details for performing this test are described in U.S. Patent 4,667,661.
- the surface friction was measured for both nonwoven padding and knitted stockinettes.
- the extruded padding and stockinette were prepared according to Example 1, above.
- the surface treated padding and stockinette were prepared as described in Example 2.
- the untreated Synthetic Cast Padding, MW 03, and untreated MS 03 stockinette were both available from 3M, St. Paul, MN.
- the data measured for the different materials are provided in Table 2, below.
- the data (the average force calculated from three runs) indicate that the extruded polypropylene/oxazolidinone padding and stockinette both had greater surface friction when compared to the corresponding padding or stockinette that was surface treated with water repellent material prepared according to Example 2.
- This example provided the results of a test panel that subjectively evaluated and compared the softness of different padding and stockinette materials.
- three padding materials an extruded polypropylene/oxazolidinone padding, a surface treated padding, and an untreated padding prepared according to Example 3
- three stockinettes a stockinette made with extruded polypropylene/oxazolidinone fabric, a surface treated stockinette, and an untreated stockinette also prepared according to Example 3 were evaluated.
- each evaluator was asked to rank the padding or stockinette material in order of softness. The identity of the materials was not provided to the evaluators. After the materials were ranked, the evaluators were then asked to assign a softness value to the material using a softness scale of 1-20, with a value of 1 being the softest and comparable to the softness of a cotton ball. The results of this evaluation are listed in Tables 3 and 4.
- Multi-layer immobilization splints were constructed and evaluated for water absorption and water retention.
- each splint was a 30.48 cm long and 8.89 cm wide padding made either from needle-tacked polypropylene/oxazolidinone fibers (99.3 wt. % polypropylene, 0.7 wt. % oxazolidinone, ODOX described above, 3M, St Paul, MN) or from needle-tacked untreated polypropylene fibers. Needle-tacking was carried out using a Hunter Needletacker (Morse and Berkshire Company, North Adams, MA). Both of the above fibers were needle tacked into nonwoven felts of about 340.2 g per 0.84 square meters.
- a layer of commercially available spun-laced, hydroentangled nonwoven polyester fabric (SONTARA 8000, DuPont, Wilmington, DE treated with 2% fluorochemical water repellant, FC- 270, as described in U.S. Patent 5,027,803) was adhered to the padding layer using the transfer tapes.
- the water absorption and retention was determined for each splint.
- the splints were weighed dry, placed in a pan of water and immersed for 0.5 minute (holding the splint under water if necessary) while squeezing twice, removing the splint from the water, squeezing the splint twice using two hands, then weighing again.
- Each splint was set in a dry pan to cure and allowed to air dry for 5 hours and weighed again.
- the multiple layers of the splint bonded together to form a cohesive laminate and the extmded polypropylene/oxazolidinone padding was softer and smoother when compared to the untreated padding.
- the splint also had desirable water absorption and retention properties.
- Example 2 Using the method and materials described in Example 1, 4364 kg of polypropylene and 1091 kg of a mixture of 90% polypropylene and 10% fluorochemical oxazolidinone was mixed to give a 98/2 polypropylene/oxazolidinone mixture which was extmded into 3 denier fibers.
- the extmded fibers were crimped, oven-dried, and then treated by kiss-coating using a conventional smooth cylinder-type coating apparatus with a mixture of 205.6 kg of a hydrophilic antistatic lubricant Sipo Lube GS-1031 commercially available from Synthetic Industries, Inc.
- Example 1 Chickamauga, GA and 36.4 kg of SCOTCHGARD brand fabric protector, FC-359, a fluorochemical mixture commercially available from 3M, St. Paul, MN.
- FC-359 a fluorochemical mixture commercially available from 3M, St. Paul, MN.
- the fiber was then cut as in Example 1 into staple fibers 3.81 cm and 4.76 cm in length.
- Padding rolls 7.62 cm and 10.2 cm wide were prepared and evaluated using the modified AATCC Test Method described above.
- the surface energy of the fibers was found to be in the range of 26.4 to 27.3 ergs/cm.
- Some of the 4.76 cm fiber was spun into 20 (cotton count) single yam using well-known processes by Southern Industrial, Rossville, GA.
- the yam was then knitted into stockinette rolls 5.08 cm and 7.62 cm wide by Balfour, Inc. , Rockwood, TN, using commercially available circular Rib-Knit Equipment.
- the stockinette was evaluated using the modified AATCC Test Method and found to have a surface energy in the range 26.4 to 27.3 erg/cm.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Epidemiology (AREA)
- General Health & Medical Sciences (AREA)
- Polymers & Plastics (AREA)
- Materials Engineering (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Organic Chemistry (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- General Chemical & Material Sciences (AREA)
- Textile Engineering (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Materials For Medical Uses (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94917992A EP0707497A1 (en) | 1993-06-01 | 1994-05-16 | Water repellent orthopedic dressing |
JP7500729A JPH08510671A (ja) | 1993-06-01 | 1994-05-16 | 撥水性整形外科包帯 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US6986893A | 1993-06-01 | 1993-06-01 | |
US08/069,868 | 1993-06-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994027648A1 true WO1994027648A1 (en) | 1994-12-08 |
Family
ID=22091706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1994/005417 WO1994027648A1 (en) | 1993-06-01 | 1994-05-16 | Water repellent orthopedic dressing |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0707497A1 (ja) |
JP (1) | JPH08510671A (ja) |
CN (1) | CN1124458A (ja) |
CA (1) | CA2162372A1 (ja) |
WO (1) | WO1994027648A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999042494A1 (de) * | 1998-02-21 | 1999-08-26 | Basf Aktiengesellschaft | Nachvernetzung von hydrogelen mit 2-oxazolidinonen |
US6544204B1 (en) * | 1998-04-02 | 2003-04-08 | Lohmann Gmbh & Co. Kg | Synthetic rigid bandage |
US6716186B1 (en) | 2000-08-16 | 2004-04-06 | 3M Innovative Properties Company | Curable adhesive splints and methods |
WO2007051122A3 (en) * | 2005-10-26 | 2008-01-10 | Bsn Medical Inc | Water resistant undercast liner |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1677713B1 (en) * | 2003-10-29 | 2010-07-14 | BSN Medical, Inc. | Medical bandaging product |
WO2023126783A1 (en) * | 2021-12-30 | 2023-07-06 | 3M Innovative Properties Company | Additives for use in low surface-energy applications |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62104978A (ja) * | 1985-10-31 | 1987-05-15 | 金井 宏之 | 撥水芯地 |
US4667661A (en) * | 1985-10-04 | 1987-05-26 | Minnesota Mining And Manufacturing Company | Curable resin coated sheet having reduced tack |
EP0260011A2 (en) * | 1986-09-12 | 1988-03-16 | Minnesota Mining And Manufacturing Company | Fluorochemical oxazolidinones |
EP0352095A1 (en) * | 1988-07-22 | 1990-01-24 | Minnesota Mining And Manufacturing Company | Orthopedic splinting and casting article |
EP0358451A1 (en) * | 1988-09-09 | 1990-03-14 | Minnesota Mining And Manufacturing Company | Heat shrinkable bandage cover |
US5025052A (en) * | 1986-09-12 | 1991-06-18 | Minnesota Mining And Manufacturing Company | Fluorochemical oxazolidinones |
EP0448883A2 (en) * | 1990-03-26 | 1991-10-02 | Minnesota Mining And Manufacturing Company | Combination comprising a release liner sheet. |
WO1993007914A1 (en) * | 1991-10-18 | 1993-04-29 | Minnesota Mining And Manufacturing Company | A method for preventing transmission of viral pathogens |
-
1994
- 1994-05-16 CN CN 94192253 patent/CN1124458A/zh active Pending
- 1994-05-16 WO PCT/US1994/005417 patent/WO1994027648A1/en not_active Application Discontinuation
- 1994-05-16 CA CA 2162372 patent/CA2162372A1/en not_active Abandoned
- 1994-05-16 JP JP7500729A patent/JPH08510671A/ja active Pending
- 1994-05-16 EP EP94917992A patent/EP0707497A1/en not_active Withdrawn
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4667661A (en) * | 1985-10-04 | 1987-05-26 | Minnesota Mining And Manufacturing Company | Curable resin coated sheet having reduced tack |
EP0494083A1 (en) * | 1985-10-04 | 1992-07-08 | Minnesota Mining And Manufacturing Company | Curable resin coated sheet having reduced tack |
JPS62104978A (ja) * | 1985-10-31 | 1987-05-15 | 金井 宏之 | 撥水芯地 |
EP0260011A2 (en) * | 1986-09-12 | 1988-03-16 | Minnesota Mining And Manufacturing Company | Fluorochemical oxazolidinones |
US5025052A (en) * | 1986-09-12 | 1991-06-18 | Minnesota Mining And Manufacturing Company | Fluorochemical oxazolidinones |
EP0352095A1 (en) * | 1988-07-22 | 1990-01-24 | Minnesota Mining And Manufacturing Company | Orthopedic splinting and casting article |
US5027803A (en) * | 1988-07-22 | 1991-07-02 | Minnesota Mining & Manufacturing Company | Orthopedic splinting and casting article |
EP0358451A1 (en) * | 1988-09-09 | 1990-03-14 | Minnesota Mining And Manufacturing Company | Heat shrinkable bandage cover |
EP0448883A2 (en) * | 1990-03-26 | 1991-10-02 | Minnesota Mining And Manufacturing Company | Combination comprising a release liner sheet. |
WO1993007914A1 (en) * | 1991-10-18 | 1993-04-29 | Minnesota Mining And Manufacturing Company | A method for preventing transmission of viral pathogens |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Section Ch Week 8726, Derwent World Patents Index; Class A94, AN 87-180454 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999042494A1 (de) * | 1998-02-21 | 1999-08-26 | Basf Aktiengesellschaft | Nachvernetzung von hydrogelen mit 2-oxazolidinonen |
US6544204B1 (en) * | 1998-04-02 | 2003-04-08 | Lohmann Gmbh & Co. Kg | Synthetic rigid bandage |
US6716186B1 (en) | 2000-08-16 | 2004-04-06 | 3M Innovative Properties Company | Curable adhesive splints and methods |
WO2007051122A3 (en) * | 2005-10-26 | 2008-01-10 | Bsn Medical Inc | Water resistant undercast liner |
US8025631B2 (en) | 2005-10-26 | 2011-09-27 | Bsn Medical, Inc. | Water resistant undercast liner |
Also Published As
Publication number | Publication date |
---|---|
CN1124458A (zh) | 1996-06-12 |
CA2162372A1 (en) | 1994-12-08 |
EP0707497A1 (en) | 1996-04-24 |
JPH08510671A (ja) | 1996-11-12 |
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