Silver and titania-loaded polyethylene medical device film

Patent metadata

Field	Value
Publication number	US-11850312-B2
Application number	US-202017088170-A
Country	US
Kind code	B2
Filing date	Nov 3, 2020
Priority date	Nov 3, 2020
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

A health care and/or entertainment device protective film may be configured to contact human skin, e.g., to limit the transmission of infection by bacteria, fungi, protozoa, prions, and/or viruses. The film may be formed as a nanocomposite film including at least 75 wt. %, relative to total organic matrix weight, of polyethylene, silver particles, and TiO 2 particles, wherein the silver particles and TiO 2 particles are distributed within and/or on an outer surface of the polyethylene, wherein the silver particles have a size of 1 to 1,000 nm, and wherein the TiO 2 particles have a size of 1 to 50 nm. Such films may be applied to health care and/or entertainment devices, including virtual reality googles.

First claim

The invention claimed is:

1. A virtual reality goggle device, comprising:
a device protective film configured to contact human skin,
a hard plastic frame, and
a flexible portion;
wherein the device protective film is in the form of a nanocomposite film, and
the nanocomposite film rests on the flexible portion opposite a surface contacting the hard plastic frame;
wherein the nanocomposite film comprises, as a nanocomposite:
at least 75 wt. %, relative to total organic matrix weight, of polyethylene;
1 to 5 wt. %, based on a total nanocomposite film weight, of silver particles; and
1 to 10 wt. %, based on a total nanocomposite film weight, of TiO 2 particles,
wherein the silver particles and TiO 2 particles are distributed within and/or on an outer surface of the polyethylene,
wherein the silver particles have a size of 1 to 1,000 nm, and
wherein the TiO 2 particles have a size of 1 to 50 nm.

2. The virtual reality goggle device of claim 1 , wherein a thickness of the outer surface comprising the silver and TiO 2 particles is in a range of from 0.025 to 25 μm.

3. The virtual reality goggle device of claim 1 , wherein the polyethylene is LDPE and is present in an amount of at least 97.5 wt. % relative to the relative to total organic matrix weight.

4. The virtual reality goggle device of claim 1 , wherein the polyethylene has a melting point in a range of from 90 to 125° C.

5. The virtual reality goggle device of claim 1 , wherein the polyethylene has a density in a range of from 0.9 to 0.99 g/cm 3 .

6. The virtual reality goggle device of claim 1 , wherein the TiO 2 particles have an average longest dimension of no more than 25 nm, and/or
wherein the TiO 2 particles have an average sphericity of at least 0.91.

7. The virtual reality goggle device of claim 1 , wherein the polyethylene is foamed.

8. The virtual reality goggle device of claim 1 , wherein the nanocomposite film comprises no more than 2 wt. % of the silver particles.

9. The virtual reality goggle device of claim 1 , wherein the flexible portion comprises a cushion and the nanocomposite film is configured to conform to the cushion contacting the skin.

Assignees

• Univ Imam Abdulrahman Bin Faisal

Inventors

• Salama Khaled Fikry
• Al Thumari Arwa Abdulrahman

Classifications

• A61L31/088 Primary

  Other specific inorganic materials not covered by A61L31/084 or A61L31/086 · CPC title

• A61L31/028

  Other inorganic materials not covered by A61L31/022 - A61L31/026 · CPC title

• A61L31/124

  of other specific inorganic materials not covered by A61L31/122 or A61L31/123 · CPC title

• A61L31/16

  Biologically active materials, e.g. therapeutic substances {(A61L31/047 takes precedence)} · CPC title

• A61L2400/12

  Nanosized materials, e.g. nanofibres, nanoparticles, nanowires, nanotubes; Nanostructured surfaces · CPC title