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Respirator including polymeric netting and method of forming same

A technology of polymers and respirators, which is applied in the direction of respiratory protective containers, breathing filters, breathing masks, etc., and can solve the problem that respirators cannot be folded into a flat shape

Active Publication Date: 2022-06-28
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, these respirators cannot be folded flat for storage and transport

Method used

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  • Respirator including polymeric netting and method of forming same
  • Respirator including polymeric netting and method of forming same
  • Respirator including polymeric netting and method of forming same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0359] prepared as Figure 22 and Figure 23 The coextrusion die generally shown in the Figure 12A and Figure 12B The multi-shim repeating pattern of extruded orifices generally shown in is assembled. The thickness of the spacers in the repeating sequence was 4 mils (0.102 mm). These spacers are formed from stainless steel with perforations cut by wire EDM. see Figure 11 , the height of the dispensing orifice 356 of the gasket 300 is cut to 100 mils (2.54 mm). see Figure 9 , the height of the dispensing orifice 156 of the gasket 100 was cut to 30 mils (0.762 mm). The spacers are stacked in a repeating sequence of 100, 100, 200, 200, 300, 300, 200, 200. After assembly, the widths of the dispensing openings 1001 and 1003 were each 0.203 mm, and the spacing between the openings was 0.203 mm. The extrusion orifices are aligned in a collinear alternating arrangement and the resulting dispensing surface is as Figure 12B shown in. The overall width of the spacer assem...

Embodiment 1b

[0365] A polymer netting sheet (approximately 260 mm x 90 mm) made as described in Example 1 was immersed in a solution made up of 90 grams of water and 10 grams of a surfactant known under the trade name "TRITON X- 100" from Dow Chemical Company, Midland, Mich.. Immediately after complete submersion of the polymer netting, it was removed from the solution and excess liquid was allowed to drip. The samples were placed on aluminum pans and dried in a batch oven at 50°C for two hours. The topsheet was removed from a 270mm x 90mm pad available from First Quality Retail Services under the trade designation "OPTIONS ULTRA THINS" and replaced with a soaked and dried polymeric netting. The polymeric netting was placed on top of the acquisition / distribution layer without adhesive.

Embodiment 1c

[0367] The topsheet was removed from a 270mm x 90mm pad available from First Quality Retail Services under the trade designation "OPTIONS ULTRA THINS" and the acquisition / distribution layer was removed and bonded with a polymer made as described in Example 1. mesh instead. The polymer netting sheet had dimensions of about 165mm x 50mm. The polymeric netting was placed on top of the absorbent body without adhesive, and the original topsheet was positioned on top of the polymeric netting without adhesive.

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Abstract

One or more embodiments of respirators comprising polymeric netting are disclosed herein. The respirator may include a mask body having a perimeter, a harness attached to the mask body, and a face seal disposed adjacent at least a portion of the perimeter of the mask body. In one or more embodiments, the face seal comprises a polymeric netting having polymeric strips and polymeric strands, wherein each of the polymeric strips and polymeric strands has a length, width and height, wherein said length is the longest dimension, said width is the shortest dimension, and said height is the dimension transverse to said length and said width. The polymeric strips have a height-to-width aspect ratio of at least 5 to 1, are intermittently bonded to the major surface of only one polymeric strand, and have a height at least twice greater than the height of the one polymeric strand .

Description

Background technique [0001] Respirators are typically worn over a person's breathing passage for at least one of two common purposes: (1) to prevent foreign matter or contaminants from entering the wearer's respiratory system; and (2) to prevent other persons or objects from entering the respiratory system. Exposure to pathogens and other contaminants exhaled by the wearer. In the first case, the respirator is worn in an environment where the air contains particles that may be harmful to the wearer, such as in an auto body repair shop. In the second case, the respirator is worn in an environment where there is a risk of contamination to other people or things, such as in operating rooms or clean rooms. [0002] A variety of respirators have been designed to meet the needs of either (or both) of these two uses. Some respirators have been classified as "filtering masks" because the mask body itself acts as a filtering mechanism. Unlike the use of rubber or elastomeric mask bo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A62B18/02A62B18/08A62B23/02A61F11/14
CPCA61F11/14A62B18/025A62B18/084A62B23/025A41D13/1138B29D28/00A61F5/0104A41D13/11A41D13/113A41D13/1176
Inventor 恩哈特·哈·提·恩古延托马斯·J·薛赛义德·A·安格德吉万德罗纳德·W·奥森威廉·J·科佩基马克·T·吉布森奥洛夫·N·汉森约瑟夫·P·克罗恩则
Owner 3M INNOVATIVE PROPERTIES CO