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US20140256865A1 - Electric-arc resistant face shield or lens including ir-blocking inorganic nanoparticles - Google Patents

Electric-arc resistant face shield or lens including ir-blocking inorganic nanoparticles Download PDF

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Publication number
US20140256865A1
US20140256865A1 US13/785,147 US201313785147A US2014256865A1 US 20140256865 A1 US20140256865 A1 US 20140256865A1 US 201313785147 A US201313785147 A US 201313785147A US 2014256865 A1 US2014256865 A1 US 2014256865A1
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Prior art keywords
nanoparticles
composition
lens
dispersion
polymer
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US13/785,147
Inventor
Jonathan Boulton
Philip Johnson
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Honeywell International Inc
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Honeywell International Inc
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Publication date
Application filed by Honeywell International Inc filed Critical Honeywell International Inc
Priority to US13/785,147 priority Critical patent/US20140256865A1/en
Assigned to HONEYWELL INTERNATIONAL INC. reassignment HONEYWELL INTERNATIONAL INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BOULTON, JONATHAN, JOHNSON, PHILIP
Priority to EP20140156676 priority patent/EP2775193A3/en
Publication of US20140256865A1 publication Critical patent/US20140256865A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A42—HEADWEAR
    • A42B—HATS; HEAD COVERINGS
    • A42B3/00—Helmets; Helmet covers ; Other protective head coverings
    • A42B3/04—Parts, details or accessories of helmets
    • A42B3/18—Face protection devices
    • A42B3/22—Visors
    • A42B3/225—Visors with full face protection, e.g. for industrial safety applications
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K9/00—Arc welding or cutting
    • B23K9/32—Accessories
    • B23K9/321—Protecting means
    • B23K9/322—Head protecting means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P1/00—Safety devices independent of the control and operation of any machine
    • F16P1/06—Safety devices independent of the control and operation of any machine specially designed for welding
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F9/00—Methods or devices for treatment of the eyes; Devices for putting in contact-lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
    • A61F9/02—Goggles
    • A61F9/022—Use of special optical filters, e.g. multiple layers, filters for protection against laser light or light from nuclear explosions, screens with different filter properties on different parts of the screen; Rotating slit-discs

Definitions

  • the present disclosure relates to electric-arc resistant materials and more particularly to electric-arc resistant face shields.
  • Electric arcs are extremely dangerous and the resulting high temperatures can cause injury through burning and can even cause immediate fatal burns. Due to the dangers involved, personal protective equipment is needed for electric arc protection, including helmets and headgear.
  • the present disclosure relates to electric-arc resistant face shields incorporating IR-blocking nanoparticles.
  • a transparent plastic composition resistant to an electric arc includes a transparent substrate material and inorganic nanoparticles.
  • the inorganic nanoparticles are dispersed in the substrate so that the composition is substantially transparent.
  • the substrate may be a cellulose-derived material such as cellulose acetate propionate or may be another transparent plastic such as polyester, polycarbonate, polysulfone or polyimides.
  • the nanoparticles preferably comprise tungsten or a tungsten bronze alloy.
  • the electric-arc resistant plastic composition is produced by preparing crystalline tungsten bronze nanoparticles and homogenously dispersing the nanoparticles in a transparent polymer material. More specifically, the crystalline tungsten bronze nanoparticles are prepared by homogeneously mixing an aqueous solution of soluble tungsten and cesium salts and then drying the solution. The dried solution is then heated in a reducing gas or inert gas atmosphere to form crystalline tungsten bronze nanoparticles. Thereafter, a dispersion agent is added and the nanoparticles are dispersed in a liquid solvent medium by wet milling with small diameter grinding media to form a dispersion mixture.
  • the dispersion mixture is then mixed with polymer pellets to form a polymer mixture, and the polymer mixture is then extruded to yield polymer pellets containing highly homogeneously dispersed inorganic nanoparticles.
  • additional particles, dyes, heat stabilizers or UV absorbers may be added.
  • the tungsten bronze powder is Cs 0.33 WO 3
  • the Cs 0.33 WO 3 nanoparticles are up to 0.2% of the resulting composition, by weight.
  • a lens or shield molded from the extruded and pelletized polymer material may be used in a face shield or other eye safety products.
  • FIG. 1 is an illustration of a face shield including a lens including the composition of the present disclosure.
  • the present disclosure relates to an electric-arc resistant face shield incorporating IR-blocking nanoparticles.
  • a transparent composition resistant to an electric arc includes a transparent substrate material and inorganic nanoparticles.
  • the inorganic nanoparticles are dispersed in the substrate so that the composition remains substantially transparent.
  • the substrate may be a cellulose-derived material such as cellulose acetate propionate, or may be another transparent plastic such as polyester, polycarbonate, polysulfone or polyimide.
  • the inorganic nanoparticles preferably comprise tungsten or a tungsten bronze alloy.
  • non-organic pigment based IR blocking materials having higher thermal stability and low visible coloration as a beneficial substitute for low thermal stability dye-based IR absorbers.
  • doped indium tin oxide (ITO) and many other nano-sized conducting metals and black compounds can behave as near infrared (NIR) blocking materials.
  • NIR near infrared
  • gold, ruthenium dioxides, rhenium trioxides and lanthanum hexaborides can behave as NIR blocking materials.
  • nano-sized reduced tungsten oxide based materials are preferred because they are notably strong and exhibit wide-band NIR absorption coupled with high visible light transmission.
  • WO 3 tungsten oxide
  • tungsten oxide tungsten oxide
  • Metallic conductivity and strong IR absorption are induced by reduction or by doping the WO 3 .
  • Nanoparticle tungsten bronzes MxWO 3 have strong NIR absorbance and high transmittance in the visible range.
  • a preferred material would be Cs 0.33 WO 3 due to its higher stability compared to other tungsten-based materials.
  • Tungsten oxide-based nanoparticles could be utilized in different ways to provide improved electric arc resistance to an article, such as a face shield lens. They could be incorporated as a component of a solution-derived coating applied directly on the lens or they could be directly incorporated into the article itself
  • the article would be made of a formable polymer such as a cellulose derived material, e.g. a cellulose acetate propionate, or another polymer such as polyester, or polycarbonate.
  • a formable polymer such as a cellulose derived material, e.g. a cellulose acetate propionate, or another polymer such as polyester, or polycarbonate.
  • High heat resistant polymers such as polysulfone and polyimides would also be suitable.
  • a polymer containing such tungsten-based nanoparticles could then be formed by processing methods such as extrusion, typically into a flat sheet from which lens shapes could be die-cut, or injection molded into a flat or curved face shield lens.
  • a protective face shield assembly 10 comprising a crown 12 and an arcuate transparent lens 16 .
  • the face shield 10 can be placed on a user's head, such that the lens 16 is supported in front of a user's eyes.
  • the lens 16 includes dispersed nanoparticles in a transparent plastic, and can be made by any of the methods of this disclosure.
  • Dispersing such nanoparticles into transparent plastics which are then used to produce electric-arc resistant face shields would allow greater design and manufacturing flexibility compared to plastics containing broadband IR dyes.
  • High heat stability would open up the possibility of using other transparent plastics such as high-heat resistant polymers.
  • polycarbonate, polyesters, and polyimides would provide higher thermal stability.
  • High heat stability would also reduce manufacturing complications and limitations due to dye degradation occurring during molding. Without an inherent dark green coloration in the visible region, it would also be possible to create plastics with tailored coloration for enhanced color recognition and tinting.
  • the starting inorganic nanoparticles are used as a concentrated dispersion in solvent.
  • the mixture would contain dispersion aids and be processed by milling.
  • the dispersion mixture would then be mixed with a polymer (e.g. polycarbonate) pellets and extruded to yield polymer pellets containing highly homogeneously dispersed inorganic nanoparticles.
  • the amount of nanoparticles would be adjusted to ensure the required degree of IR blocking and arc rating in the final product.
  • Other additives, dyes, and pigments could also be incorporated.
  • Good dispersion would be required to ensure low haze in the final part.
  • the pellets would then be molded or extruded to give a sheet or molded into the final shape.
  • Tungsten oxide-based nanoparticles can be prepared by several methods. Many tungstate compositions would be suitable for blocking IR and use in the present invention but those incorporating cesium would be preferred, alone or in combination with other monovalent or divalent metal ions.
  • Cs 0.33 WO 3 tungsten bronze powder can be prepared by homogeneously mixing an aqueous solution of soluble tungsten and cesium salts, e.g. ammonium tungstate and cesium acetate, followed by drying and high temperature treatment in a reducing/inert gas atmosphere to form the final crystalline tungsten bronze nanoparticles.
  • cesium salts e.g. ammonium tungstate and cesium acetate
  • a homogenous dispersion of the tungsten nanoparticles are then prepared in a liquid solvent medium, e.g. toluene, using a wet milling method with small diameter grinding media.
  • a liquid solvent medium e.g. toluene
  • the milling media would be zirconia-based and have a diameter of less than 0.3 mm.
  • a horizontal wet media mill would be suitable for this application.
  • a dispersing agent e.g. a polyacrylate, would be typically added at this stage to improve the dispersion of the powder material and to yield a stable solvent dispersion of the nanoparticle.
  • Other materials including inorganic particles, organic dyes, heat stabilizers and UV absorbers can be added at this stage or later.
  • the amount or concentration of nanoparticles in the final article would be adjusted to ensure the required degree of IR blocking and arc rating in the final product. Relatively low concentrations of tungsten oxide nanoparticles would be used for this application, for example 0.2% by weight and lower.
  • the tungstate nanopowder After obtaining a good dispersion of the tungstate nanopowder, it is compounded into a polymer by conventional methods, for example, by kneading or by extrusion. Compounding using a twin-screw extruder followed by pelletizing would be the preferred method.
  • the compounded pelletized material is then molded into a face shield lens by conventional injection molding.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

A transparent electric-arc resistant composition is produced by preparing crystalline tungsten bronze nanoparticles and homogenously dispersing the nanoparticles in a transparent plastic matrix. The crystalline tungsten bronze nanoparticles are prepared by homogeneously mixing an aqueous solution of soluble tungsten and cesium salts and then drying the solution. The dried solution is then heated in a reducing gas or inert gas atmosphere to form crystalline tungsten bronze nanoparticles. Thereafter, a dispersion agent is added and the nanoparticles are dispersed in a liquid solvent medium by wet milling to form a dispersion mixture. The dispersion mixture is then mixed with polymer pellets to form a polymer mixture, and the polymer mixture is then extruded to yield polymer pellets containing highly homogeneously dispersed inorganic nanoparticles. During or after dispersion, additional particles, dyes, heat stabilizers or UV absorbers, may be added. A lens or shield is then molded from the polymer pellets.

Description

    BACKGROUND
  • The present disclosure relates to electric-arc resistant materials and more particularly to electric-arc resistant face shields.
  • Electrical workers are at risk from electric arcs or flashes from high voltage equipment. Electric arcs are extremely dangerous and the resulting high temperatures can cause injury through burning and can even cause immediate fatal burns. Due to the dangers involved, personal protective equipment is needed for electric arc protection, including helmets and headgear.
    • SUMMARY OF THE DISCLOSURE
  • The present disclosure relates to electric-arc resistant face shields incorporating IR-blocking nanoparticles.
  • A transparent plastic composition resistant to an electric arc includes a transparent substrate material and inorganic nanoparticles. The inorganic nanoparticles are dispersed in the substrate so that the composition is substantially transparent. The substrate may be a cellulose-derived material such as cellulose acetate propionate or may be another transparent plastic such as polyester, polycarbonate, polysulfone or polyimides. The nanoparticles preferably comprise tungsten or a tungsten bronze alloy.
  • The electric-arc resistant plastic composition is produced by preparing crystalline tungsten bronze nanoparticles and homogenously dispersing the nanoparticles in a transparent polymer material. More specifically, the crystalline tungsten bronze nanoparticles are prepared by homogeneously mixing an aqueous solution of soluble tungsten and cesium salts and then drying the solution. The dried solution is then heated in a reducing gas or inert gas atmosphere to form crystalline tungsten bronze nanoparticles. Thereafter, a dispersion agent is added and the nanoparticles are dispersed in a liquid solvent medium by wet milling with small diameter grinding media to form a dispersion mixture. The dispersion mixture is then mixed with polymer pellets to form a polymer mixture, and the polymer mixture is then extruded to yield polymer pellets containing highly homogeneously dispersed inorganic nanoparticles. During or after dispersion, additional particles, dyes, heat stabilizers or UV absorbers, may be added.
  • In one embodiment, the tungsten bronze powder is Cs0.33WO3, and the Cs0.33WO3 nanoparticles are up to 0.2% of the resulting composition, by weight.
  • A lens or shield molded from the extruded and pelletized polymer material may be used in a face shield or other eye safety products.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The preferred embodiment will now be described further by way of example with reference to the following examples and figures, which are intended to be illustrative only and in no way limiting upon the scope of the disclosure.
  • FIG. 1 is an illustration of a face shield including a lens including the composition of the present disclosure.
    •  DETAILED DESCRIPTION OF THE INVENTION
  • The present disclosure relates to an electric-arc resistant face shield incorporating IR-blocking nanoparticles.
  • A transparent composition resistant to an electric arc includes a transparent substrate material and inorganic nanoparticles. The inorganic nanoparticles are dispersed in the substrate so that the composition remains substantially transparent. The substrate may be a cellulose-derived material such as cellulose acetate propionate, or may be another transparent plastic such as polyester, polycarbonate, polysulfone or polyimide. The inorganic nanoparticles preferably comprise tungsten or a tungsten bronze alloy.
  • The present disclosure describes the use of non-organic pigment based IR blocking materials having higher thermal stability and low visible coloration as a beneficial substitute for low thermal stability dye-based IR absorbers. For example, doped indium tin oxide (ITO) and many other nano-sized conducting metals and black compounds can behave as near infrared (NIR) blocking materials. As further examples, gold, ruthenium dioxides, rhenium trioxides and lanthanum hexaborides can behave as NIR blocking materials.
  • In a particular exemplary embodiment as described herein, nano-sized reduced tungsten oxide based materials are preferred because they are notably strong and exhibit wide-band NIR absorption coupled with high visible light transmission.
  • Stoichiometric WO3 (tungsten oxide) nanoparticles are highly transparent in both the visible and NIR regions. Metallic conductivity and strong IR absorption are induced by reduction or by doping the WO3. Nanoparticle tungsten bronzes MxWO3 have strong NIR absorbance and high transmittance in the visible range. A preferred material would be Cs0.33WO3 due to its higher stability compared to other tungsten-based materials.
  • Tungsten oxide-based nanoparticles could be utilized in different ways to provide improved electric arc resistance to an article, such as a face shield lens. They could be incorporated as a component of a solution-derived coating applied directly on the lens or they could be directly incorporated into the article itself
  • A preferred method would be to incorporate these nano-particles into the bulk matrix of the lens itself Generally, the article would be made of a formable polymer such as a cellulose derived material, e.g. a cellulose acetate propionate, or another polymer such as polyester, or polycarbonate. High heat resistant polymers, such as polysulfone and polyimides would also be suitable.
  • A polymer containing such tungsten-based nanoparticles could then be formed by processing methods such as extrusion, typically into a flat sheet from which lens shapes could be die-cut, or injection molded into a flat or curved face shield lens.
  • Referring to FIG. 1, there is shown a protective face shield assembly 10 comprising a crown 12 and an arcuate transparent lens 16. The face shield 10 can be placed on a user's head, such that the lens 16 is supported in front of a user's eyes. The lens 16 includes dispersed nanoparticles in a transparent plastic, and can be made by any of the methods of this disclosure.
  • Dispersing such nanoparticles into transparent plastics which are then used to produce electric-arc resistant face shields would allow greater design and manufacturing flexibility compared to plastics containing broadband IR dyes. High heat stability would open up the possibility of using other transparent plastics such as high-heat resistant polymers. For example, polycarbonate, polyesters, and polyimides would provide higher thermal stability. High heat stability would also reduce manufacturing complications and limitations due to dye degradation occurring during molding. Without an inherent dark green coloration in the visible region, it would also be possible to create plastics with tailored coloration for enhanced color recognition and tinting.
  • The starting inorganic nanoparticles are used as a concentrated dispersion in solvent. The mixture would contain dispersion aids and be processed by milling. The dispersion mixture would then be mixed with a polymer (e.g. polycarbonate) pellets and extruded to yield polymer pellets containing highly homogeneously dispersed inorganic nanoparticles. The amount of nanoparticles would be adjusted to ensure the required degree of IR blocking and arc rating in the final product. Other additives, dyes, and pigments could also be incorporated. Good dispersion would be required to ensure low haze in the final part. The pellets would then be molded or extruded to give a sheet or molded into the final shape.
  • Tungsten oxide-based nanoparticles can be prepared by several methods. Many tungstate compositions would be suitable for blocking IR and use in the present invention but those incorporating cesium would be preferred, alone or in combination with other monovalent or divalent metal ions.
    • Example 1
  • Cs0.33WO3 tungsten bronze powder can be prepared by homogeneously mixing an aqueous solution of soluble tungsten and cesium salts, e.g. ammonium tungstate and cesium acetate, followed by drying and high temperature treatment in a reducing/inert gas atmosphere to form the final crystalline tungsten bronze nanoparticles.
  • A homogenous dispersion of the tungsten nanoparticles are then prepared in a liquid solvent medium, e.g. toluene, using a wet milling method with small diameter grinding media. Typically the milling media would be zirconia-based and have a diameter of less than 0.3 mm. A horizontal wet media mill would be suitable for this application. A dispersing agent, e.g. a polyacrylate, would be typically added at this stage to improve the dispersion of the powder material and to yield a stable solvent dispersion of the nanoparticle. Other materials including inorganic particles, organic dyes, heat stabilizers and UV absorbers can be added at this stage or later.
  • The amount or concentration of nanoparticles in the final article would be adjusted to ensure the required degree of IR blocking and arc rating in the final product. Relatively low concentrations of tungsten oxide nanoparticles would be used for this application, for example 0.2% by weight and lower.
  • After obtaining a good dispersion of the tungstate nanopowder, it is compounded into a polymer by conventional methods, for example, by kneading or by extrusion. Compounding using a twin-screw extruder followed by pelletizing would be the preferred method.
  • The compounded pelletized material is then molded into a face shield lens by conventional injection molding.
    • Example 2
  • Even lower concentrations of tungsten oxide nanoparticles could be used for this application, for example 0.1% by weight and lower.
  • The present disclosure is believed to represent a significant advancement in the art, which has substantial commercial merit.
  • While there is shown and described herein certain specific structure embodying a composition including inorganic nanoparticles and specific steps for a method of manufacturing the composition, it will be manifest to those skilled in the art that various modifications and rearrangements of the parts or steps may be made without departing from the spirit and scope of the underlying concept and that the same is not limited to the particular forms herein shown and described except insofar as indicated by the scope of the appended claims.

Claims (20)

What is claimed is:
1. A transparent plastic composition resistant to an electric arc comprising:
a transparent polymer material; and
inorganic nanoparticles dispersed within the polymer material so that the composition is substantially transparent.
2. The composition of claim 1, wherein the polymer material is selected from the group consisting of a cellulosic polymer, polyester, polycarbonate, polysulfone and polyimide.
3. The composition of claim 1, wherein the nanoparticles comprise tungsten.
4. The composition of claim 3, wherein the nanoparticles are crystalline tungsten bronze.
5. The composition of claim 4, wherein the nanoparticles are Cs0.33WO3.
6. The composition of claim 4, wherein the nanoparticles are up to 0.2% of the composition, by weight.
7. The composition of claim 2, wherein the nanoparticles comprise tungsten.
8. The composition of claim 7, wherein the nanoparticles are crystalline tungsten bronze.
9. The composition of claim 8, wherein the nanoparticles are Cs0.33WO3.
10. The composition of claim 8, wherein the nanoparticles are up to 0.2% of the composition, by weight.
11. An electric arc resistant lens for safety eyewear comprising:
a transparent polymer material; and
inorganic nanoparticles dispersed within the polymer material so that the composition is substantially transparent.
12. The lens of claim 11, wherein the polymer material is selected from the group consisting of a cellulosic polymer, polyester, polycarbonate, polysulfone and polyimide.
13. The lens of claim 11, wherein the nanoparticles comprise tungsten.
14. The lens of claim 13, wherein the nanoparticles are crystalline tungsten bronze.
15. The lens of claim 14, wherein the nanoparticles are Cs0.33WO3.
16. The lens of claim 14, wherein the nanoparticles are up to 0.2% of the composition, by weight.
17. The lens of claim 12, wherein the nanoparticles comprise tungsten.
18. The lens of claim 17, wherein the nanoparticles are crystalline tungsten bronze.
19. The lens of claim 18, wherein the nanoparticles are Cs0.33WO3.
20. The lens of claim 18, wherein the nanoparticles are up to 0.2% of the composition, by weight.
US13/785,147 2013-03-05 2013-03-05 Electric-arc resistant face shield or lens including ir-blocking inorganic nanoparticles Abandoned US20140256865A1 (en)

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* Cited by examiner, † Cited by third party
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US20140041105A1 (en) * 2012-08-07 2014-02-13 Mason Zemlak Eye Protection Employing Luminescent Materials for Ionizing Radiation Warnings to the Wearer
US20150113712A1 (en) * 2013-10-29 2015-04-30 Jack Bouton Hirschmann, JR. Grey Compounded Infrared Absorbing Faceshield
EP3015093A1 (en) * 2014-10-28 2016-05-04 OBERON COMPANY, A Division of Paramount Corporation Grey compounded infrared absorbing spectacles, goggles, faceshields and hood windows used in personal protective equipment for arc flash hazards
US20170176603A1 (en) * 2015-12-22 2017-06-22 Dosilab AG Dosimeter device
USD831193S1 (en) * 2015-08-13 2018-10-16 Jsp Limited Modular respirator with visor
US10246371B1 (en) 2017-12-13 2019-04-02 Corning Incorporated Articles including glass and/or glass-ceramics and methods of making the same
US10450220B2 (en) 2017-12-13 2019-10-22 Corning Incorporated Glass-ceramics and glasses
US10464840B2 (en) 2016-10-05 2019-11-05 Corning Incorporated Near infrared shielding and laser-resistant window
USD899001S1 (en) * 2020-04-08 2020-10-13 Medspec Llc Face shield
USD899700S1 (en) * 2020-04-16 2020-10-20 Medspec Llc Face shield
US10845519B2 (en) 2016-04-27 2020-11-24 Rayotek Scientific, Inc. Lens for protective gear
US10921615B2 (en) 2015-05-27 2021-02-16 Oberon Company Div Paramount Corporation Grey compounded infrared absorbing spectacles, goggles, faceshields and hood windows used in personal protective equipment for arc flash hazards
US11053159B2 (en) 2017-12-13 2021-07-06 Corning Incorporated Polychromatic articles and methods of making the same
US11214511B2 (en) 2016-06-17 2022-01-04 Corning Incorporated Transparent, near infrared-shielding glass ceramic
US11351756B2 (en) 2017-12-15 2022-06-07 Corning Incorporated Laminate glass ceramic articles with UV-and NIR-blocking characteristics and methods of making the same
USD985850S1 (en) * 2019-10-31 2023-05-09 Uvex Arbeitsschutz Gmbh Face guard
US11746041B2 (en) 2017-12-04 2023-09-05 Corning Incorporated Glass-ceramics and glass-ceramic articles with UV- and NIR-blocking characteristics
US12338169B2 (en) 2018-11-16 2025-06-24 Corning Incorporated Glass ceramic devices and methods with tunable infrared transmittance

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Cited By (30)

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Publication number Priority date Publication date Assignee Title
US9480604B2 (en) * 2012-08-07 2016-11-01 Mason Zemlak Eye protection employing luminescent materials for ionizing radiation warnings to the wearer
US20140041105A1 (en) * 2012-08-07 2014-02-13 Mason Zemlak Eye Protection Employing Luminescent Materials for Ionizing Radiation Warnings to the Wearer
US20150113712A1 (en) * 2013-10-29 2015-04-30 Jack Bouton Hirschmann, JR. Grey Compounded Infrared Absorbing Faceshield
US9498382B2 (en) * 2013-10-29 2016-11-22 Oberon Company Div Paramount Corp. Grey compounded infrared absorbing faceshield
EP3015093A1 (en) * 2014-10-28 2016-05-04 OBERON COMPANY, A Division of Paramount Corporation Grey compounded infrared absorbing spectacles, goggles, faceshields and hood windows used in personal protective equipment for arc flash hazards
US10921615B2 (en) 2015-05-27 2021-02-16 Oberon Company Div Paramount Corporation Grey compounded infrared absorbing spectacles, goggles, faceshields and hood windows used in personal protective equipment for arc flash hazards
USD831193S1 (en) * 2015-08-13 2018-10-16 Jsp Limited Modular respirator with visor
US10436914B2 (en) * 2015-12-22 2019-10-08 Dosilab AG Dosimeter device
US20170176603A1 (en) * 2015-12-22 2017-06-22 Dosilab AG Dosimeter device
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US10845519B2 (en) 2016-04-27 2020-11-24 Rayotek Scientific, Inc. Lens for protective gear
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EP2775193A2 (en) 2014-09-10

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