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Crush resistant filtering face mask

A filter mask and filter layer technology, which is applied in the direction of breathing filters, breathing masks, respiratory protection containers, etc., to achieve the effect of high filtering performance

Inactive Publication Date: 2005-09-07
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] While the industry recognizes that there are a variety of methods for manufacturing molded filtering face masks, there is still room for improvement in the methods of making this product

Method used

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  • Crush resistant filtering face mask
  • Crush resistant filtering face mask
  • Crush resistant filtering face mask

Examples

Experimental program
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Effect test

Embodiment 1

[0070] The cup-shaped mask of the present invention is prepared as follows: First, the shaping layer, the belt and the filter material are formed into a layer in the order of S·A·F·A·S, wherein S represents the shaping layer, A represents the adhesive layer, and F represents filter layer. The forming layer material was thermally bonded staple fiber [T-254, 4 denier, cut to 38 mm length, composition: PET core, PET copolyester sheath] purchased from Kosa Corporation of Charlotte, Carolina. Form the fibers of the forming layer into a unit weight of 63g / m 2 The mesh, inner and outer layers use Air Rando Webber products. The adhesive layer was a nonwoven adhesive web PE-85-12 available from Bostik Findley, Middleton, MA. The unit weight of the filter is 35g / m 2, fiber size: effective fiber diameter (EFD) 4.7 microns (according to Davies C.N.'s article "Separation of Airborne Dust Particles" published in "Institution of Mechanical Engineers London Journal" (1B, 1952) by Davies C....

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Abstract

A filtering face mask that includes a mask body that is adapted to fit over the nose and mouth of a person and a harness that is attached to the mask body. The mask body comprises i) a first shaping layer that has been molded; ii) a second shaping layer that has been molded; iii) a filtration layer that is disposed between the first and second shaping layers; iv) a first adhesive layer that adheres the first shaping layer to the filtration layer; and v) a second adhesive layer that adheres the second shaping layer to the filtration layer.

Description

technical field [0001] This invention relates to filtering face masks having excellent crush resistance. The face mask includes first and second adhesive layers positioned between the filter layer and the first and second shaping layers, respectively. Background technique [0002] Some respirators are "disposable" in that they are only intended to be used for a short period of time. These masks are usually made of non-woven fabrics and are generally divided into two categories, foldable flat masks and shaped masks. Foldable flat masks are packaged flat, but are sewn and creased to give them a cup-like configuration when opened. Conversely, shaped masks are almost permanently shaped to fit the face and stay that way while in use. [0003] Shaped masks typically have a support structure, commonly referred to as a shaping layer. The forming layer is usually made of thermally bondable fibers, which stick together with adjacent fibers when heated and cooled. Examples of mask...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62B18/02A41D13/11D04H1/4382D04H1/559
CPCA41D13/1146A62B18/025A62B18/08A62B23/025
Inventor S·A·安加吉范达J·E·斯帕啉季特T·I·英斯利
Owner 3M INNOVATIVE PROPERTIES CO
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