ES2360716A1 - Improved filtering nucleus. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

The aim of the improved filter core is to obtain a high percentage of retention with a minimum cost and size, as well as to reduce manufacturing costs by reducing manufacturing times without requiring specialized labor. It is applicable to filters for masks to breathe a person can also be applied to other suction devices that require a high percentage of retention. It is characterized in that it comprises at least two non-folded filter layers (1) placed one above the other in superimposed planes, to which a hermetic seal (2) is made at its periphery. (Machine-translation by Google Translate, not legally binding)

Description

Enhanced filter core.

Object of the invention

The present invention, as expressed in the set forth in this specification, refers to a nucleus improved filter that aims to obtain a high retention percentage with a minimum cost and dimensions, as well as reduce manufacturing costs, reducing downtime manufacturing also without needing specialized labor.

The improved filter core is applicable to masks to breathe a person in environments loaded with pollutants, such as solid particles and aerosols and / or liquids, etc.

It is also applicable to other devices of aspiration that requires a high percentage of retention.

Background of the invention

Currently and for more than thirty years, solid particle and aerosol protection filters solids or liquids with a retention greater than 99.95% are filters made with folded and glued filter cores.

The manufacturing process of these filters Conventional is as follows:

The first step is to perform the folding of the core filter with the desired height (which will give the height of the filter) by a specific machine, so that the lower the Most expensive filter is this process.

Once folded the conformation is done radial of the filter core by gluing in the center and giving it the desired shape, or the non-radial filter core by gluing the folded strips. Once the core is made filter gets into the filter core box which will then go threaded, by bayonet or by other means attached to the mask or mask.

Said union between the filter core and the housing The filter core must be sealed and hermetic, for which a special glue is used, so that apply said glue on the inner contour of the core box filter by centrifuging the filter core box with the core filter inside.

The product obtained is a filter with a height Approximately 12/14 mm.

On the other hand, it is currently being developed and appearing a filter core also folded but smaller height, made with a synthetic filter material with a low breathing resistance and good holding power, being the filter material more expensive than usual and folding with little Height is also more expensive.

These described processes are expensive due to the special machinery that is required for folding, by the special gluing / spinning machinery, by hand times of work that they require and because to perform these operations is It is necessary to have specialized labor.

Description of the invention

In order to achieve the objectives and avoid the drawbacks mentioned in the previous sections, the invention proposes an improved filter core whose configuration and design allows to reduce manufacturing costs, reduce time of manufacturing it without the need for labor specialized.

Also this improved filter core has a reduced height, said reduction being 50-60% compared to current filter cores, with what stand out much less than the masks in front of existing ones, thereby increasing comfort in the use of These masks.

Through this improved filter core, obtains a retention greater than 99.95% with a good resistance to breathing, being able to apply as a filtering core against solid and / or liquid particles and aerosols, as mixed filters with Class 1 gas filter and as mixed filters with anti filter Class 2 gases. Also said filter core has other industrial applications such as the use in devices of aspiration, etc., that require a high percentage of retention.

This improved filter core is characterized because it is composed of two or more unfolded filter layers, placed on top of each other to which a closure is made hermetic at its periphery.

Another feature of the invention is that said Hermetic closure can be by using an adhesive or by means of a mechanical union that puts pressure on the periphery of the filter core preventing particles from leaking through said Union.

Unfolded filter layers are characterized in turn because they are formed by layers of microfibers, which are generated by a melt-blown polymer adhered to a polymer base.

Filtering is obtained by combining of layers of filter material not folded with loads electrostatic and weight of microfibers the same or different.

Next to facilitate a better understanding of this descriptive report and being an integral part It is accompanied by a single figure in which with character illustrative and not limiting the object of the invention.

Brief description of the drawing

Figure 1.- Shows an elevation view sectioning of the improved filter core, object of the invention.

Description of the preferred embodiment

Considering the numbering adopted in the figures, the improved filter core comprises a feature structure formed by two or more unfolded filter layers 1, placed on top of each other to which a closure is made airtight 2 on its periphery.

Said seal may be by use of adhesive or by means of a mechanical joint that performs pressure at the periphery of the filter core preventing them from leaking particles by said union.

In turn, the unfolded filter layers are formed by layers of microfibers, which are generated by a molten-blown polymer bonded to a base of polymer.

The filter core of the invention has a reduced height, up to 50-60% compared to the current filter cores, which stand out a lot less of the masks compared to the existing ones, with what Increases comfort in the use of such masks.

With the improved filter core you get also a good high retention greater than 99.95%. The filtrate is obtained by combining unfolded filter layers with electrostatic charges and different microfibre weight or Similary.

Claims (7)

1. Improved filter core, which being designed to prevent the passage of solid particles and solid and liquid aerosols with high retention, is characterized in that it comprises at least two unfolded filter layers placed one above the other in superimposed planes, layers to which Performs a tight (2) tight seal on its periphery. 2. Improved filter core according to claim 1, characterized in that the unfolded filter layers (1) are formed by microfiber layers. 3. Improved filter core according to claim 2, characterized in that the microfibers are generated by a melt-blown polymer adhered to a polymer base. 4. Improved filter core according to any one of the preceding claims, characterized in that the sealing is carried out by means of adhesive. 5. Improved filter core according to any one of claims 1 to 3, characterized in that the sealing is carried out by mechanical bonding. 6. Improved filter core according to claim 5, characterized in that the mechanical union is carried out by means of pressure on the periphery of the filter core preventing particles from leaking through said joint. 7. Improved filter core according to any one of the preceding claims, characterized in that the microfibers have electrostatic charges.