Filtration component with microcapsule elements for respiratory protective device

Patent metadata

Field	Value
Publication number	US-12576291-B2
Application number	US-202218060889-A
Country	US
Kind code	B2
Filing date	Dec 1, 2022
Priority date	Dec 15, 2021
Publication date	Mar 17, 2026
Grant date	Mar 17, 2026

Abstract

A filtration component with microcapsule elements for respiratory protective devices is provided. In some examples, the filtration component includes a periphery wall element and a filter media element. In some examples, the periphery wall element comprises a plurality of microcapsules. In some examples, the filter media element is secured to an inner circumference surface of the periphery wall element.

First claim

The invention claimed is:

1 . A filtration component for a respiratory protective device, the filtration component comprising:
a periphery wall element comprising a plurality of microcapsules; and a filter media element secured to an inner circumference surface of the periphery wall element, wherein one or more of the plurality of microcapsules comprises a shell portion and a core portion, wherein the core portion is positioned within the shell portion, and wherein the core portion comprises a fragrance material.

2 . The filtration component of claim 1 , wherein the core portion comprises a temperature sensitive material.

3 . The filtration component of claim 2 , wherein the core portion comprises a humidity sensitive material.

4 . The filtration component of claim 2 , wherein the temperature sensitive material transfers from a solid state to a liquid state when a temperature of the temperature sensitive material is within a temperature range.

5 . The filtration component of claim 4 , wherein the temperature range is between 32 degrees Celsius and 35 degree Celsius.

6 . The filtration component of claim 4 , wherein the temperature sensitive material comprises at least one of a paraffin material or a polyethylene glycol (PEG) material.

7 . The filtration component of claim 3 , wherein the humidity sensitive material transfers from a solid state to a liquid state when the humidity sensitive material is in a relative humidity range.

8 . The filtration component of claim 7 , wherein the relative humidity range is more than 90%.

9 . The filtration component of claim 7 , wherein the humidity sensitive material comprises at least one of a monosaccharide material, a disaccharide material, or a trisaccharide material.

10 . The filtration component of claim 1 , wherein the shell portion comprises a heat resistant material.

11 . The filtration component of claim 10 , wherein a melting temperature of the heat resistant material is above 180 degrees Celsius.

12 . The filtration component of claim 10 , wherein the heat resistant material comprises a crosslinked polyurethane, a polyamide, and/or a functional resin.

13 . The filtration component of claim 1 , wherein a thickness of the shell portion is above 50 micrometers.

14 . The filtration component of claim 1 , wherein the periphery wall element further comprises thermoplastic elastomer material.

15 . A method for manufacturing a filtration component for a respiratory protective device, the method comprising:
forming a plurality of microcapsules, wherein the each of the plurality of microcapsules comprises a shell portion and a core portion; forming the core portion based at least in part with a fragrance material; forming a resin mixture based at least in part on mixing the plurality of microcapsules with thermoplastic elastomer material; forming a mixture strip based at least in part on injecting the resin mixture into an extruder; and forming a periphery wall element of the filtration component based at least in part on molding the mixture strip in a mold.

16 . The method of claim 15 , wherein, when forming the plurality of microcapsules, the method forming comprising:
forming the core portion based at least in part on mixing two or more of the fragrance material, a temperature sensitive material, and a humidity sensitive material; and coating the core portion with the shell portion, wherein the shell portion comprises heat resistant material.

17 . The method of claim 16 , wherein the temperature sensitive material comprises at least one of a paraffin material or a polyethylene glycol (PEG) material.

18 . The method of claim 16 , wherein the humidity sensitive material comprises at least one of a monosaccharide material, a disaccharide material, or a trisaccharide material.

19 . The method of claim 15 , wherein the shell portion comprises a crosslinked polyurethane, a polyamide, and/or a functional resin.

20 . The method of claim 15 , further comprising:
attaching filter media element to an inner circumference surface of the periphery wall element.

Assignees

• Honeywell Safety Products Usa Inc

Inventors

• Han Xiaojin
• Tian Hang
• Chen Enyi
• Shi Wei
• Xiang Hongbing

Classifications

• B01D46/0038

  with means for influencing the odor, e.g. deodorizing substances · CPC title

• B01D46/0001

  Making filtering elements · CPC title

• A62B18/02 Primary

  Masks (gas-masks for animals A62B18/06; masks for welders A61F9/06) · CPC title

• A62B18/006

  with pumps for forced ventilation (A62B18/045 takes precedence) · CPC title

• A62B18/08

  Component parts for gas-masks or gas-helmets, e.g. windows, straps, speech transmitters, signal-devices (eye-pieces for protective goggles A61F9/02; composition of materials for the windows or other transparent parts A62D7/00) · CPC title