CZ2011418A3 - Device for production of face masks - Google Patents

Abstract

Facial cloth manufacturing equipment comprising at least one unwinding and tensioning device (1, 2), folding device (3) for forming longitudinal folds, fixation device (4) allowing lateral fixation of longitudinal folds and punching device (7) for punching out end face shape rousky. Between the fixation device (4) and the punching device (7), a silicone paper storage device (5) is inserted with an adhesive layer (611) applied to the fabric and a device for transferring the adhesive to the fabric or for fixing the adhesive on the fabric surface.

Description

(57)

Apparatus for making face masks comprising at least one of a fabric spreader and a tensioning device (1, 2), a folding device (3) for forming longitudinal folds, a fixation device (4) allowing transverse fixation of the longitudinal folds and a punching device (7) shaped face mask. Between the fixation device (4) and the punching device (7), a silicone paper receiving device (5) with an adhesive layer (611) applied to the fabric and a device for transferring the adhesive to the fabric or a fastening adhesive on the fabric surface is interposed.

CZ 2011 -417 A3

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Technical field

BACKGROUND OF THE INVENTION The present invention relates to an apparatus for making face masks comprising at least one fabric unwinding and tensioning device, a folding device for forming longitudinal folds, a fixation device allowing transverse fixation of longitudinal folds, and a punching device for cutting out the final shape of the face mask.

BACKGROUND OF THE INVENTION

It is known from PV 2011-22 for a face mask for removing biological and mechanical impurities from inhaled and / or exhaled air, which comprises an inner textile layer and an outer textile layer between which a filter layer of polymer nanofibres and / or an active layer of polymer nanofibres is deposited. it contains biocidal substance (s) in which the outer and inner textile layers are made of microfibres, at least the outer textile layer and the adjacent filter or active layer of polymer nanofibres are hydrophobic, and all the layers of the drapery are interconnected networks of joints that prevent their mutual movement and minimally reduce the breathability of the mask. At the same time, the inner textile layer is provided with a layer of adhesive for attachment to the face of the wearer along the circumference of the drape.

With this arrangement, the drape achieves high filtration efficiency, and due to the hydrophobic properties of at least the outer textile layer and the adjacent nanofiber layer, it is substantially impermeable to both air and breath moisture of the wearer so that it does not become wet and create conditions for microorganisms or dimensionally smaller than the interfiber spaces of the nanofiber layer. The adhesive layer on the inner textile layer ensures that the drape adheres tightly to the wearer's face over its entire circumference, so that it does not become trapped and all inhaled and exhaled air passes through the veil.

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This application also discloses a method of making a face mask, wherein the face masks are punched out of the fabric in at least two longitudinal rows arranged side by side along the length of the fabric in which a filter layer of polymer nanosilver is situated between the outer fabric layer of the mask and the inner fabric layer; or an active layer of polymer nanosubs containing the biocidal substance (s) and which is uniform in the width and length directions of the fabric. Prior to punching, the layers of the fabric are interconnected by a network of joints preventing the layers from moving relative to one another. The fabric is arranged at the top of the drapes at the beginning of the drapes production. Subsequently, in the first step, continuous folds are formed for the middle portion of the drapes of each longitudinal row of drapes, which are fixed along the width of the fabric at the sides of the drapes and an adhesive is applied over the circumferential portion of future drapes. for example strips of silicone paper, and a row of side-by-side drapes are punched to a final shape. In this process, the application of adhesive to the peripheral portions of the future drapes and the overlapping of the adhesive with an anti-adhesive material appear to be problematic, since there is a superimposition of the silicone paper strips on top of each other, creating a risk of unwanted peeling. Further, it is difficult to ensure that the silicone paper strips always completely overlap the adhesive.

It is an object of the present invention to provide a device for manufacturing a face mask that removes the above drawbacks.

SUMMARY OF THE INVENTION

The object of the invention is achieved by a facial masking device according to the invention, which comprises inserting a silicone paper storage device with an adhesive layer on the fabric and a device for transferring the adhesive to the fabric or fixing the adhesive to the surface of the fabric between the fixing device and the punching device. . The device provides great assurance of high-quality application of the adhesive to the surface of the fabric and at the same time perfect securing of the adhesive by means of one layer of silicone paper or other non-sticking agent.

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In a preferred embodiment, the silicone paper is disposed in the unwinding device without an adhesive layer, wherein an adhesive applicator for the silicone paper is disposed between the silicone unwinding device and the depositing device.

With this solution, significant adhesive savings can be achieved by applying only to the peripheral portion of the face mask. For this purpose, the adhesive applicator is provided with an applicator in the form of a peripheral face mask.

The same purpose is achieved if the silicone paper is shaped into the peripheral portion of the face mask on which the adhesive is to be applied before the adhesive is applied.

Simplification of the device is achieved when the silicone paper is disposed in the unwinding device with an adhesive layer applied therein, the adhesive savings being achieved when the adhesive layer is applied on the silicone paper in the form of a peripheral face mask, the inner part of the mask being adhesive free.

In all embodiments with full width silicone paper, it is preferred that prior to being deposited on the fabric, the adhesive-coated silicone paper is guided through a die cutter in which the inner portion corresponding to the inner portion of the future face mask is punched and removed.

In all embodiments, the fabric comprises at least one nanofiber layer, which is covered by a protective layer of fabric for the outside of the face mask and for the inside of the face mask, the nanofiber layer is covered by the fabric supporting layer.

Overview of the drawings

An exemplary embodiment of a face mask device according to the invention is shown schematically in the attached drawing.

DETAILED DESCRIPTION OF THE INVENTION

The face masking device according to the invention comprises a first unwinding and tensioning device 1 on which a protective device is prepared for unwinding

1

P33753EN a nonwoven fabric 11 constituting in the facial mask an outer layer which is generally formed of a nonwoven fabric of microfibers of a hydrophobic material, preferably of a meltblown nonwoven fabric of polypropylene (PP), viscose (VS), polyester (PES) or other microfibers . Most preferably, however, the protective nonwoven fabric 11 is a combination of a sub-layer formed from a spunbonded nonwoven fabric and a sub-layer formed from a meltblown nonwoven fabric, wherein the sub-layer formed from a spunbond nonwoven fabric improves the mechanical properties protects the meltblown non-woven sub-layer from mechanical abrasion and damage. If desired, the protective nonwoven fabric 11 may also be formed in any other suitable manner.

Furthermore, the device comprises a second unwinding and tensioning device 2 on which a nanofiber nonwoven fabric 22 is prepared for unwinding. The nanofibrous layer nonwoven fabric 22 comprises a carrier layer and a filtering and / or active nanofibrous layer, which are bonded to one another in a known manner. In many cases one filter nanofibrous layer is sufficient. The backing layer in the facial mask produced is an inner layer to be applied to the face and is preferably made of a non-woven fabric, preferably a spunbond type of microfibers of a hydrophobic material such as polypropylene (PP) or polyester (PES), or a nonwoven fabric. spunlace of viscose (VS), cellulose or polymeric microfibers. The nanofiber filter layer consists of nanofibres from hydrophobic polymer, such as polyvinylidene fluoride (PVDF), polyurethane (PUR), polyester (PES), polylactic acid (PLA), polycaprolactone (PCL), etc. The active nanofiber layer consists of nanofibres from the same a hydrophobic polymer, in the structure of which a suitable biocidal substance (s) is arranged which kills or at least attenuates the microorganisms (bacteria, viruses, fungi, yeasts, etc.) trapped in the drape 1 or passing through the drape. If desired, the nonwoven fabric 22 with nanofiber layer can be formed in another suitable manner.

The protective nonwoven fabric 11 is deposited on the nanofibrous layer of the nonwoven fabric 22 with the nanofibrous layer by the second unwinding and tensioning device 2 and further the two nonwoven fabrics 11, 22 are guided together into the folding device 3 which form longitudinal folds in the known nonwoven fabric 11, 22 in a known manner, which are laterally fixed in a subsequent fixation device 4 by a suitable method which does not create openings in the resulting fabric which could interfere with the filtering properties of the drapes, for example by heat or ultrasonic welding . In addition to the fixation of the folds, the two nonwoven fabrics 11, 22 may also be interconnected by a set of point and / or line joints or other suitable means in the fixing device 4. In the embodiment shown, the fixation device 4 contributes to the forward movement of the two fabrics 11, 22. Of course, the folding device 3 can also contribute to the forward movement if it is equipped with a take-off device.

The folding device may be preceded by a known device (not shown) for joining the two nonwoven fabrics 11, 22 by a set of point and / or line seams or by any other suitable means that ensures the relative position of the two nonwoven fabrics 11, 22 and does not reduce breathing patency.

In the embodiment (not shown), only one unwinding and tensioning device is used on which a nonwoven fabric comprising a carrier layer, a nanofiber layer and a protective layer is deposited, the layers preferably being interconnected by a system of joints that do not reduce breathing patency.

Further, the bonded nonwoven webs 11, 22 with longitudinal folds are fed to a silicone paper storage device 5 5 with an applied layer 611 of adhesive capable of being transferred to the fabric after the silicone paper has been deposited on the fabric, for example a hot melt adhesive.

The silicone paper 61 is fed to the depositing device 5 from the silicone paper unwinding device 6 through a hot melt applicator 62 in which a hot melt adhesive layer 611 is applied to the silicone paper 61. The hot melt adhesive layer 611 can be applied either over the entire width of the future face mask or only in a selected shape that corresponds to the shape of the peripheral face of the face mask onto which the adhesive is to be applied. Silicone paper 61 coated with a hot melt or other suitable adhesive with good dermal compatibility prior to depositing;

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I 4 ♦ - * t i I i * «I. To the upper surface of the bonded nonwovens 11, 22 extends through a die cutter 63 in which the inner portion corresponding to the inner portion of the future face mask, i.e. the portion through which the is breathing. After cutting, the silicone paper 61 with the melt adhesive layer 611 is deposited on the surface of the bonded nonwoven webs 11, 22. Or, the silicone paper 61 may be shaped to the peripheral portion of the face mask to which the adhesive is to be applied beforehand the silicone paper 61 and the shaped silicone paper 61 deposit on the surface of the bonded nonwoven fabrics.

In an embodiment (not shown), the silicone paper 61 is disposed in the unwinding device 6 with an applied layer 611 of adhesive which can be applied either in full width or in the form of a peripheral portion of the face mask, the inner portion of the mask being adhesive free. In this embodiment, too, before being deposited on the top surface of the bonded nonwoven webs 11, 22, it can be guided through a die cutter 63 in which the inner portion corresponding to the inner portion of the future face mask, the portion through which it breathes, is punched and removed. After die-cutting, the silicone paper 61 with the hot-melt adhesive layer 611 is deposited on the surface of the bonded nonwovens 11, 22.

Subsequently, the hot melt adhesive is transferred by pressure and / or heat to the nonwoven fabric 22 having a nanofibrous layer, which in the illustrated embodiment is performed on a conveyor belt 64 for pressing the hotmelt adhesive into the nonwoven fabric 22.

The conveyor belt 64 is followed by a face mask punching device 7 in which a final face mask shape is cut from the prepared web of nonwoven webs 11, 22 and silicone paper 61, which is deposited on the conveyor 8, in the illustrated embodiment. into a packaging device 9 in which the individual face masks are packaged and stored in a transport means.

Claims (8)

PATENT CLAIMS Apparatus for making face masks comprising at least one fabric unwinding and tensioning device (1, 2), a folding device (3) for forming longitudinal folds, a fixation device (4) allowing transverse fixation of the longitudinal folds and a punching device (7) for cutting in the form of a face mask, characterized in that a silicone paper storage device (5) with an adhesive layer (611) applied to the fabric and a device for transferring the adhesive into the fabric is interposed between the fixing device (4) and the punching device (7); for attaching adhesive to the fabric surface. The device according to claim 1, characterized in that the silicone paper (61) is embedded in the unwinding device (6) without an adhesive layer (611), wherein a deposition device (5) is disposed between the silicone unwinding device (6) and the deposition device (5). a silicone adhesive adhesive device (62). Device according to claim 2, characterized in that the adhesive device for the silicone paper comprises the application means in the form of a peripheral part of the face mask onto which the adhesive is to be applied. 4. The apparatus of claim 2 wherein the silicone paper is shaped prior to application of the adhesive to the peripheral portion of the face mask onto which the adhesive is to be applied. Device according to claim 1, characterized in that the silicone paper (61) is embedded in the take-up device with an applied layer (611) of adhesive. The apparatus of claim 5, wherein the adhesive layer (611) is applied to the silicone paper in the form of a peripheral face mask, wherein the inner face mask is adhesive free. Device according to any one of claims 1 to 3 or 5 and 6, characterized in that, before being deposited on the fabric, the silicone paper (61) with the adhesive layer (611) is guided through a die cutter (63) in which it is Rsa7sacz punched and removed the inner part corresponding to the inner part of the future face mask. Device according to any one of the preceding claims, characterized in that the fabric comprises at least one nanofiber layer which is covered by a protective layer of fabric for the outside of the face mask and for the inner face of the face mask the nanofiber layer is covered by the fabric supporting layer.