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Multilayer composition for breathing mask

A technique for breathing masks and products, which is applied in the direction of breathing filters, breathing protection containers, applications, etc., and can solve problems such as the loss of the breathing surface of the breathing mask

Inactive Publication Date: 2011-07-20
DELTALYO & VALMY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] - The installation of a safety valve (valve) occupies 7% to 12% of the total inspiratory surface, which results in the loss of part of the inspiratory surface of the breathing mask;

Method used

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  • Multilayer composition for breathing mask
  • Multilayer composition for breathing mask
  • Multilayer composition for breathing mask

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Experimental program
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Embodiment Construction

[0035] Although the multi-layer filter product for protective respiratory masks according to the invention does not have safety valves (valves), it obtains at least equivalent filtering capacity and Breathability.

[0036] According to the invention, said article comprises a first intermediate layer and a second intermediate layer sandwiched between two facing layers, said intermediate layer being intended in particular to achieve efficient filtration, said two facing layers forming support for the entire structure , said layers have been selected for their respective compositions from those used in the manufacture of respiratory masks, having both filtering properties (enabling them to filter fine and sub-micron particles) and breathing properties (enabling them to reduce the effort required to breathe) layer to choose from.

[0037] The two facing layers thus comprise an outer layer and an inner layer, each formed of a spunbonded nonwoven fabric, capable of providing mechanic...

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PUM

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Abstract

The present invention provides a multilayer filtering composition for a protective breathing mask, characterized in that the multilayer filtering composition comprises, from the outside in: (a) an external layer made of a spunbonded nonwoven fabric; (b) a first intermediate layer of felt-type tribocharged nonwoven fabric based on at least two different types of fibres suitable for giving the fabric opposite electric charges that enhance the filtration; (c) at least one second intermediate layer made of a nonwoven ply of melt-blown microfibres, said ply being charged with static electricity; and (d) an internal layer in contact with the face made of a spunbonded nonwoven fabric.

Description

technical field [0001] The present invention relates to a multi-layer filter article for a disposable protective respiratory mask to block any airborne particles that may be sub-micron in size while improving inhalation-exhalation performance to at least An effect comparable to the inhalation-exhalation performance of a disposable mask with an exhalation valve. [0002] The invention relates to the use of said multilayer filter article for the production of protective respiratory masks, in particular for vigorous professional physical activity, so that the use of disposable breathing masks with respiratory safety valves (valves) can be dispensed with mask. Background technique [0003] Generally, a protective respiratory mask consists of a portion intended to be in contact with the face to cover the nose and mouth, made of one or more layers of filter material held together by gluing or welding the edges, the mask being placed in a sealed manner over the face and kept in c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A62B23/02A41D13/11
CPCA41D13/11A62B23/025
Inventor 维亚尼·布里亚
Owner DELTALYO & VALMY