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Respirator that uses a polymeric nose clip

A technology of respirators and polymer materials, applied in the direction of respiratory protective containers, respiratory filters, respiratory masks, etc., can solve the problems that the nose clip has not been widely accepted, does not show shape retention characteristics, and achieves harmful small effect

Inactive Publication Date: 2008-09-24
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While plastic nose clips have been used on respirators, these known nose clips have not gained widespread acceptance because they do not exhibit particularly good shape retention characteristics after being deformed into the desired shape

Method used

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  • Respirator that uses a polymeric nose clip
  • Respirator that uses a polymeric nose clip
  • Respirator that uses a polymeric nose clip

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0096] The nose clip of the present invention is constructed and secured to the mask body. The nose clip comprised polyethylene (PE) strands manufactured by Mitsui Chemicals, Inc. (Tokyo, Japan) under the trade name "TeknoRote". The construction of the nose clip is basically similar to figure 1 and 3 The nose clip shown in. Connect 5 PE strands with a diameter of 1.1 millimeters (mm) in a parallel arrangement, and fix them in a parallel arrangement with a nylon wire braid. The spacing between these moldable strands is about 0.2mm. The strands had a length of about 114 mm and an aspect ratio of about 145. The crystallinity of each strand was tested using the crystallinity index method, and the crystallite orientation of each strand was tested using pole figure analysis. The pole figure image is in Image 6 and 7 Shown in , along with a normalized intensity map. Image 6 represents the crystallographic orientation of the longitudinal dimension of the sample, while Fig...

example 2

[0099] The respirator was constructed as described in Example 1 except that an adhesive was used to secure the nose clip to the respirator. The adhesive was 3M Super 77 spray adhesive, manufactured by 3M Company, St. Paul, Minnesota. Before applying adhesive, adjust the nose clip profile to match the shape of the respirator nose area. Apply adhesive evenly across the entire underside of this contoured nose clip. After applying the adhesive, carefully press the nose clip onto the respirator. Be careful not to distort the shape of the mask body while applying enough pressure to create a good bond between the mask body and the nose clip.

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Abstract

A respirator 10 that has a mask body 14 and a malleable nose clip 12 . The mask body 14 is adapted to fit at least over the nose and mouth of a person to define an interior gas space that is separate from the exterior gas space. The mask body 14 has the nose clip 12 secured to it and can include at least one layer of filter media 20 . The malleable nose clip 12 comprises a semi-crystalline polymeric material that has an integrated diffraction intensity ratio of at least about 2.0. The nose clip 12 can be deformed into a desired configuration that enables the mask body 14 to maintain a snug fit over a person's nose when the respirator is worn for extended time periods. Because the nose clip 12 does not need to contain metal, the whole respirator 10 can be easily processed as waste in an incinerator when its service has ended.

Description

[0001] The present invention relates to a respiratory mask having a nose clip comprising a thermoplastic semi-crystalline polymer material having an integrated diffraction intensity ratio of at least about 2.0. The nose clip of the present invention is easy to bend manually and also has good shape retention. Background technique [0002] Respirators (sometimes called "filtering facepieces" or "filtering masks") are generally worn over a person's breathing passages and serve two general purposes: (1) to prevent impurities or pollutants from entering the wearer's respiratory system; and (2) Prevents exposure of other persons or objects to pathogens and other contaminants exhaled by the wearer. In the first case, the respirator is worn in an environment where there are particles in the air that are harmful to the wearer, such as in an auto body shop. In the second case, respirators are worn in environments where there is a possibility of contamination of other persons or objects...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62B18/02
CPCA62B23/025A41D13/11A62B18/02
Inventor 苏雷什·卡拉图尔迈尔斯·L·布罗斯特伦薛建贤
Owner 3M INNOVATIVE PROPERTIES CO
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