EP0089181A1
Expired / Lapsed
EP
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Powder coating process for forming soft flexible polyurethane film
Assignee: Deseret Medical Inc
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Filing: 1983-03-09
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Granted: —
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Expires: 2003-03-09
Abstract
Abstract A powder coating process for producing soft, flexible polyurethane films particularly in the form of a surgical glove, wherein low melting crystalline prepolymer particles are powder coated and cured to an essentially non-crystalline film.
Inventors
- 👤 Charles Wesley Mcgary, Jr.
- 👤 Vincent Joseph Pascarella
- 👤 Robert Arthur Taller
- 👤 Delmer Richard Rhodes
- 👤 Paul Edward Anglin
- 👤 Charles William Daugherty
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 20:15
CPC Classifications
C; C09; C09D; C09D175/00; C09D175/04; A; A61; A61B; A61B42/00; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/2805; C08J; C08J5/00; C08J5/18; A41; A41D; A41D19/00; A41D19/0055; A41D19/0058; A41D19/0062; C08G2150/00; C08G2150/20; C08J2375/00; C08J2375/04; Y; Y10; Y10S; Y10S264/00; Y10S264/51
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A process for forming a soft, flexible polyurethane film, which process comprises: a) fluidizing finely divided particles of a polyurethane prepolymer having a crystalline melt point in the range of approximately 10 to 45°C, b) pre-heating a film form to a temperature at which the particles will adhere to the form when in contact therewith, c) immersing the pre-heated form in the fluidized particles such that the particles deposit on the form, and d) heating the form to melt the particles such that the particles flow out into a thin continuous essentially pin hole-free film.
Claim 2
Dependent Claim
95 words
A process for forming a soft, flexible polyurethane film, which process comprises: a) fluidizing finely divided particles of a polyurethane prepolymer having a crystalline melt point in the range of approximately 10 to 45°C, b) pre-heating a film form to a temperature at which the particles will adhere to the form when in contact therewith, c) immersing the pre-heated form in the fluidized particles such that the particles deposit on the form, and d) heating the form to melt the particles such that the particles flow out into a thin continuous essentially pin hole-free film.
Claim 3
Dependent Claim
20 words
A process according to Claim 1, wherein certain portions of the form are pre-heated to higher temperatures than other portions.
Claim 4
Dependent Claim
101 words
A process for forming a surgical glove or a similar glove of a flexible nature, which process comprises: a) fluidizing finely divided particles of a polyurethane prepolymer having a crystalline melt point in the range of approximately 10 to 45°C, b) pre-heating a glove form to a temperature at which the particles will adhere to the form when in contact therewith, c) immersing the pre-heated form in the fluidized particles such that the particles deposit on the form, and d) heating the form to melt the particles such that the particles flow out into a thin continuous essentially pin hole-free film.
Claim 5
Dependent Claim
101 words
A process for forming a surgical glove or a similar glove of a flexible nature, which process comprises: a) fluidizing finely divided particles of a polyurethane prepolymer having a crystalline melt point in the range of approximately 10 to 45°C, b) pre-heating a glove form to a temperature at which the particles will adhere to the form when in contact therewith, c) immersing the pre-heated form in the fluidized particles such that the particles deposit on the form, and d) heating the form to melt the particles such that the particles flow out into a thin continuous essentially pin hole-free film.
Claim 6
Dependent Claim
23 words
A process according to Claim 3, wherein the glove form has the cuff portion preheated to a higher temperature than the finger portion.
Claim 7
Dependent Claim
15 words
A process according to any preceding claim, which additionally comprises curing the pin hole-free film.
Claim 8
Dependent Claim
94 words
A process for forming a surgical glove or a similar glove of a flexible nature, which process consists essentially of: a) fluidizing finely divided particles of a polyurethane prepolymer, b) pre-heating a glove form to a temperature at which the particles will adhere to the form when in contact therewith, c) immersing the pre-heated form in the fluidized particles such that the particles deposit on the form, d) heating the form to melt the particles such that the particles flow out into a thin continuous essentially pin hole-free film, and e) curing the film.
Claim 9
Dependent Claim
94 words
A process for forming a surgical glove or a similar glove of a flexible nature, which process consists essentially of: a) fluidizing finely divided particles of a polyurethane prepolymer, b) pre-heating a glove form to a temperature at which the particles will adhere to the form when in contact therewith, c) immersing the pre-heated form in the fluidized particles such that the particles deposit on the form, d) heating the form to melt the particles such that the particles flow out into a thin continuous essentially pin hole-free film, and e) curing the film.
Claim 10
Dependent Claim
23 words
A process according to Claim 6, wherein the polyurethane prepolymer has a crystalline melt point in the range of about 10 to 45°C.
Claim 11
Dependent Claim
17 words
A process according to any preceding claim, wherein the film form is pre-treated with a release agent.
Claim 12
Dependent Claim
24 words
A process according to any preceding claim, wherein at least 80% by weight of the particles range from 20 to 75 microns in size.
Claim 13
Dependent Claim
16 words
A process according to any preceding claim, wherein the particles are cooled as they are fluidized.
References Cited (Backward Citations)
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