EP1115501B1 - Method for partially applying a surface coating and breathable film with such a partial surface coating - Google Patents

Abstract

The device (1) has an applicator (3a) with nozzle, and a sieve (6a), which is located between nozzle and moving material length (W). A second applicator (3b) with nozzle and sieve (6b) is positioned on the opposite side of the material length, for direct or indirect application of a flowing synthetic medium (K) to the other side of the material. Both applicators are aligned relative to each other, so that a first coating (2a) at least partially coincides with a second coating (2b). The sieves are esp. formed as turnable sieve drums.

Description

The invention relates to a method for applying partial Surface coatings on a breathable, waterproof Foil and a foil with such a partial surface coating with the features of the generic term of independent Claims.

for the production of multilayer flat structures, it is known a punctiform surface coating on a substrate apply an adhesive. Then the substrate covered with another film. The film is over the glue points connected to the substrate. Such fabrics come for example as breathable textiles for clothing for use.

Methods and devices are known from CH 648 497 and CH 663 310 known in which the partial surface coating in the screen printing process with the help of a rotating Sieve drum can be applied. With this known method and with this known device it is possible to unilaterally to produce laminated, two-layer fabrics.

A device is known from US Pat. No. 4,732,800 or from US Pat. No. 5,827,579. where on a textile carrier an adhesive point and a barrier point on the opposite side of the adhesive point to prevent the adhesive dot from breaking through is applied by the carrier.

It is desirable not only two-layer, but also three-layer Manufacture fabrics. This is the case with clothing, for example beneficial if a medium, breathable Foil on both sides (i.e. with an outer layer and with one Lining) can be concealed.

It is therefore an object of the present invention, a method and a device for applying partial surface coatings creating on both sides of a slide so that the film can be laminated on both sides. Another The object of the invention is to provide a film with a double-sided to create partial surface coating. Another The task is to create three-layer fabrics with one to create a middle, breathable layer.

The double-sided surface coating is said to be breathable do not interfere with the film. In addition, the textile Handle of the film in comparison with films laminated on one side not be deteriorated.

According to the invention, these tasks are carried out using a method with a film and with a 3-layer fabric with the Features of the characterizing part of the independent claims solved.

The device for applying a partial surface coating according to the invention is based on that in CH 648 497 and CH 663 310 shown screen printing principle. The content of this Publications are hereby explicitly included in the content of this Registration added. The device has at least one first application device for direct or indirect application a flowable plastic mass on one side of the film or on a carrier. The first application device points preferably at least a first application nozzle and a first, movable sieve. The movable sieve is between the application nozzle and the film or between the application nozzle and the Carrier arranged. The first sieve is in sync with the film or movable with the carrier.

When applied directly, the flowable plastic mass applied directly to the film through the sieve.

With indirect application, the flowable plastic mass first on a carrier, for example in the form of an endless Tape or applied in the shape of a cylinder and then transferred from the carrier to the film. Under application nozzle is in In connection with the present application, each device for Apply the plastic mass understood.

The device has for coating the other surface of the film at least a second one, on the other side of the film arranged application device. The second application device is used for direct or indirect application of the flowable Plastic compound on the other side of the film or on another carrier.

The first and second application devices are aligned with one another or alignable so that surface coatings on the two sides of the film at least partially congruent are. The device can be used to manufacture a partially coated on both sides, breathable and waterproof Use foil.

The second application device preferably has at least one second application nozzle and a second movable sieve. The second movable screen is between the second application nozzle and the film or between the second application nozzle and the carrier arranged. The second sieve can be moved synchronously with the first sieve. In addition, the first sieve and the second sieve are mutually in the running direction of the film and / or in one direction across Can be aligned or aligned with the running direction of the film. With the alignable arrangement of the first and the second sieve can the partial surface coating on one side the film is congruent with the partial surface coating be applied on the other side of the film. On in this way, both sides of the film are coated or respectively creates uncoated surface sections. The breathability the film coated on both sides is therefore in comparison for breathability of a film coated on one side only not affected. The handle is also a 3-ply Laminates with a medium film according to the invention clearly better than a film with non-congruent coatings a film coated on both sides or comparable with the handle of a film coated only on one side. It is also conceivable to provide other orders that allow congruent coating on both sides. Instead of of seven can e.g. Gravure rollers are used that serve to hold the plastic material and the other can be aligned.

In a particularly preferred embodiment, the first application device from a sieve and the second application device works on the gravure principle. typically, becomes a screen roller on one side and on the other Engraving roller inserted side. This arrangement is in Especially with regard to the stability of the coating process advantageous. Due to the closed surface of the engraving roller can serve as a pressure roller. Another The advantage of this arrangement is that it starts out from the engraving roller as a pattern the sieve roller in a simple way can be manufactured. By starting from the engraving roller is manufactured beforehand, it is ensured that the arrangement of the screen openings in the screen roller are arranged identically as the recesses in the engraving roller. The engraving roller and the screening roller are in the foreground described manner mutually alignable.

The film is typically a breathable, waterproof Foil such as B. Goretex or Sympatex used. breathable and impermeable in this context means that the film water vapor to a certain extent lets through and that during normal use the film e.g. as Garment is waterproof.

In a preferred embodiment of the invention the first and the second sieve from sieve drums, which are rotatably mounted are. The sieve drums rotate in opposite directions.

However, a band-shaped rotating sieve is also conceivable.

In a particularly preferred embodiment, the Surface coating directly from the screening drums to the film given up. The film runs between the two screening drums therethrough. The two sieve drums are arranged so that their axes lie in a plane perpendicular to the film. The sieve drum So on one side of the film serves at the same time as a pressure roller for the other screen drum on the other side the slide.

The screening drums are mutually advantageous both in the axial direction as well as in the direction of the film. Furthermore can also align the axes of the two screening drums that they are on the same level.

The orientation of the sieve drums in the direction of the film can achieved by suitable selection of the speed of rotation of the drums become. In operation, the rotation speed is the two sieve drums of the same size, so that the two sieves move synchronously. To align the one screen with respect of the other sieve (in the circumferential direction or running direction) the movement speed can be selected differently for so long until the sieves are aligned. aligned in this context means that the sieve openings of the one screen at the moment of applying the partial surface coating congruent with the sieve openings of the other Siebs get lost.

The screen openings typically form a grid of points. It are other arrangements, e.g. Lines, conceivable.

In a particularly preferred further embodiment the first and the second sieve are identical. For example two identical sieve drums can be used. The identical selection of the screen pattern ensures that that a congruent partial surface coating both surfaces of the film can be generated. But it would be it is also conceivable to provide fewer sieve openings in a sieve than the other sieve, so the two sieves are not complete are identical.

In the case of sieve drums, it is particularly advantageous to use them to drive a servo motor. The servo motor allows alignment of the two screens in the direction of the film.

The device points in the running direction of the film after the application devices arranged arrangements for double-sided lamination the slide on. This results in a device for Manufacture of triple laminates (three-layer fabrics).

For example, fabrics, knitted fabrics or nonwovens come as lamination for use.

The inventive method for applying a partial Surface coating on a film is particularly beneath Use of a device as described above is advantageous. However, other devices would also be conceivable. According to the invention becomes a partial surface coating on both sides of the film applied. The surface coatings on the two sides of the film are aligned with each other in this way applied that the film coated on both sides and each has uncoated sections on both sides. The partial Surface coating is on one side of the film thus at least partially congruent with the partial surface coating on the other side of the slide.

The film according to the invention is advantageous with a device and using a method in that described above Shape. But there would also be other methods and devices conceivable for the production of such films. The foil has a partial surface coating on both sides on. According to the invention, the surface coating is the first Side at least partially congruent with the surface coating the second page. It will be on the slide sections coated on both sides and uncoated on both sides educated. At least partially becomes congruent understood in this context that coated to everyone Section on a first page of the slide in the same place a coated section on the second side of the film is arranged. But it may be on the second page there are additional coated sections. This can be advantageous if more on one side of the film Adhesive, for example more adhesive points, may be desired than on the other side of the slide. It is also conceivable that Make dots larger on one side of the film than that Dots on the other side of the slide.

The coating is preferably punctiform on the film applied. An adhesive, for example, comes as a coating made of polyurethane. Typically around 50 Points per cm2 of film surface applied. The dots point a surface area of 0.8 mm2 per point.

Figur 1

eine schematische Darstellung einer Vorrichtung zum Herstellen eines erfindungsgemässen Flächengebildes,

Figur 2

eine vergrösserte Darstellung der Auftragvorrichtungen einer Vorrichtung gemäss Figur 1,

Figuren 3a bis 3c

verschiedene Ausführungsbeispiele einer erfindungsgemässen Folie,

Figur 4

eine schematische Darstellung eines alternativen Ausführungsbeispiels von Auftragvorrichtungen,

Figur 5

eine vergrösserte Darstellung eines Ausschnitts aus den Auftragvorrichtungen gemäss Figuren 1 und 2,

Figur 6

eine Draufsicht auf zwei Auftragvorrichtungen gemäss Figuren 1 oder 2,

Figur 7

eine schematische Darstellung eines dreilagigen Laminats gemäss der Erfindung, und

Figur 8

eine vergrösserte Darstellung eines Ausschnitts eines alternativen Ausführungsbeispiels.

The invention is explained below in exemplary embodiments and with reference to the drawings. Show it:

Figure 1

1 shows a schematic representation of a device for producing a flat structure according to the invention,

Figure 2

2 shows an enlarged view of the application devices of a device according to FIG. 1,

Figures 3a to 3c

different embodiments of a film according to the invention,

Figure 4

1 shows a schematic illustration of an alternative exemplary embodiment of application devices,

Figure 5

2 shows an enlarged illustration of a detail from the application devices according to FIGS. 1 and 2,

Figure 6

2 shows a top view of two application devices according to FIGS. 1 or 2,

Figure 7

is a schematic representation of a three-layer laminate according to the invention, and

Figure 8

an enlarged view of a section of an alternative embodiment.

Figure 1 shows a device 1 for coating on both sides a film W with a flowable plastic mass K.

The film W is in the running direction L around a deflection roller 8 and passed between two applicators 3a, 3b. The Foil W is coated on both sides 4a, 4b with a coating 2a, 2b provided.

The film W is then passed over a spreader 9 and fed to a lamination arrangement 7.

The laminating arrangement 7 consists essentially of two calenders 10a, 10b. The calender 10a, 10b is from both sides the film W a material Ma and Mb for laminating the film W fed.

The flowable plastic mass K consists of an adhesive. The material Ma and Mb is over the adhesive on both sides 4a, 4b of the film W in the laminating arrangement 7 with the film W. connected.

The film W consists of a breathable, waterproof film, for example Goretex or Sympatex. The materials Ma and Mb for the lamination are woven, knitted or non-woven, e.g. Polyester fabric or fleece.

After lamination in the lamination arrangement 7, the film W performed as a three-layer laminate over a cooling table 14.

The coatings 2a, 2b are partial surface coatings applied to the sides 4a, 4b of the film W. typically, is the partial surface coating as a grid of points educated.

Point to apply the punctiform surface coating both order arrangements 3a, 3b one about an axis A1 or A2 rotatably mounted screening drum 6a, 6b. The plastic material K is from the inside of the sieve drum through the sieve openings 11a, 11b (see Figures 2 and 5) on the two surfaces 4a, 4b Foil W applied.

To apply the plastic material K is inside the screen rollers 6a, 6b an application nozzle 5a, 5b and a doctor blade 23 on one Doctor blade holder 21 provided. The doctor holder 21 can be heated his. Due to the rotary movement of the screen rollers 6a, 6b and The angle of the squeegee 23 passes through the plastic material Screen opening.

Around the screen rollers 6a, 6b there is also an infrared hood 20 for Heating the screen rollers 6a, 6b provided. The infrared hood 20 is necessary to keep the plastic material K in a pasty state remains so that the material passes through the sieve openings 11a, 11b in the screening drums 6a, 6b on the surfaces 4a, 4b the film W can be applied.

So that the surface coating 2a, 2b on both sides 4a, 4b of the film W is congruent, the sieve drums 6a, 6b aligned with each other.

The axes A1, A2 of the two screening drums 6a, 6b lie in one and the same plane E, which is perpendicular to the film W and perpendicular to the running direction L of the film W. The axes A1, A2 can may be adjustable so that it is accurate lie in level E.

The speed of rotation of the screen rollers 6a, 6b is also adjustable so that the screen rollers 6a, 6b synchronously with each other and rotate synchronously with the film W. The surface speed the sieve drum 6a, 6b corresponds to the speed with which moves the film W forward.

The sieve drums 6a, 6b are also in the axial direction A1, A2 and aligned in the circumferential direction U1 and U2 so that the sieve openings 11a, 11b in the two sieve drums 6a, 6b with each other align when they come into contact with the film W. In order to it is ensured that 4a and on the other side 4b each have a coated surface area is produced.

In Figure 2 is an enlarged view of the two order arrangements 3a, 3b. Figure 2 shows how the screen openings 11a, 11b are aligned with one another in the area of the film W. The Plastic material K is liquefied inside the sieve drum 6a, 6b and through the screen openings 11a, 11b onto the surfaces 4a, 4b of the film W as partial surface coatings 2a, 2b applied.

FIGS. 3a to 3c show various embodiments of the invention coated foils W shown.

According to FIG. 3a, 2a is for each coated surface area on one side 4a of the film W on the other side 4b same coated surface area in the same place 2b formed. The pattern of the coating 2a on one Surface 4a is therefore congruent with the pattern of the coating 2b on the other side 4b of the film W.

FIG. 3b shows a film W in which each is coated Area 2b on one side 4b on the other side 4a a surface area 2a is formed. On page 4a are but further surface areas 2a are also formed.

FIG. 3c shows a film W in which each point 2a on one side 4a a point 2b on the other side 4b equivalent. The size of points 2a and 2b is different, however.

The term is essentially congruent in the following Registration of each of the embodiments 3a to 3c includes.

In Figure 4 is an alternative embodiment of the invention Device shown.

Instead of that, as in FIG. 1, the partial surface coating 2a, 2b directly from a screening drum 6a, 6b onto the 4, a carrier Ta, Tb is provided. The plastic material K is based on a grid of points given the surface of the carrier Ta, Tb and from this to the Transfer slide W. The carriers Ta, Tb are designed as rollers. The speed of rotation of the screening drums 6a, 6b and the rollers Ta, Tb are synchronous with each other and synchronous with the speed the film W. By the sieve drums 6a, 6b to each other an indirect order is placed by partial surface coatings aligned to each other i.e. essentially congruent on both sides 4a, 4b are.

Of course, instead of a carrier Ta, Tb in the form a roller also a band-shaped carrier as in CH 648 497 or CH 663 310 can be used.

In Figure 5 is an enlarged view of the screening drums 6a, 6b according to FIG. 2 in the area of the application of the plastic material K shown on the film W. The sieve openings 11a, 11b the sieve drums 6a, 6b are aligned with one another in this area. The plastic material K is therefore on the top 4a and applied congruently on the underside 4b.

To adjust the peripheral speed of the screening drums 6a, 6b, an engine is operated correspondingly quickly. To align the sieve openings 11a, 11b in the circumferential direction U1, U2 one sieve drum 6a moves faster than the other for as long Sieve drum 6b until the sieve openings 11a, 11b with each other aligned. Then the sieve drums continue to run at the same peripheral speed U turned. Alignment can be visual (i.e. by observing an operator). The sieve drums can also do this with reference markings on their surface be provided. It is also conceivable to use reference marks to be provided automatically (e.g. via optoelectronics) are detectable.

In Figure 6 is a schematic plan view of the two sieve drums 6a, 6b. The sieve drums 6a, 6b are rotatable around Axes A1, A2 mounted. On the left edge of the screening drums 6a, 6b screen openings 11a, 11b are shown schematically. The sieve openings 11a of one drum 6a are related to the screen openings 11b of the other sieve drum 6b aligned and lie in and the same plane perpendicular to axis A. Subsequently follow the screen openings 11a, 11b shown further (not shown) sieve openings 11a, 11b, which in Arranged planes 12 perpendicular to the axes A1, A2 are.

The sieve drums 6a, 6b are identical. In particular are an equal number of sieve openings on both sieve drums 6a, 6b 11a, 11b arranged at equal distances.

So that the screen openings 11a of a screening drum 6a in the same level 12 as the screen openings 11b of the other Sieve drum 6b are the sieve drums 6a, 6b along the axes A1, A2 slidable. The shift can be manual or motorized respectively.

FIG. 7 shows a sheet G according to the invention, which is designed as a three-layer laminate. The inventive Foil W forms a middle layer. On the one hand 4a a first material Ma is laminated onto the film W. On the second side 4b of the film W is laminated with a second material Mb. The material Ma, Mb consists of a woven, knitted fabric or a fleece, which over the partial surface coating 2a, 2b in the form of dots with that formed from foil Foil W is connected. Because the surface coatings 2a, 2b on the surfaces 4a, 4b aligned with each other moisture, H can be unhindered by gaps between pass through the surface coatings 2a and 2b.

In Figure 8 is an enlarged section of one between two Continuous application of an alternative embodiment Slide shown.

The first applicator 3a is in the one described above Formed and consists essentially of a sieve drum 6a, through which the plastic mass K on the side 4a of the Foil W can be applied.

In contrast to the exemplary embodiments described above is the second application device 33 with an engraving roller 36 trained. The engraving roller 36 has depressions 35 on the same pattern over the surface of the engraving roller 36 are distributed like the sieve openings 11 of the sieve drum 6a.

The engraving roller 36 is passed through a bath, which the Contains plastic material K. With a doctor blade 34, the plastic material scraped off the surface of the engraving roller 36, so that the plastic material K only in the recesses 35 remains. From the recesses 35, the plastic material applied to the surface 4b of the film W by contact.

In contrast to sieve openings 11, the depressions 35 form one clearly defined counter pressure surface for the screen drum 6a. On stable operation is possible.

Claims (4)

1. A method for depositing a partial surface coating onto a breathing-active foil,
   characterised in that on both surfaces (4a, 4b) of the foil (W) there is deposited a partial adhesive surface coating (2a, 2b),
   wherein the coatings (2a, 2b) on the two surfaces (4a, 4b) of the foil are deposited at least partly congruently, so that the foil (W) in each case on both surfaces comprises coated and uncoated sections and that advantageously directly subsequently the foil is laminated on both surfaces.
2. A breathing-active, water impermeable foil (W), in particular manufactured with a device according to claim 1, with a partial adhesive surface coating (2a, 2b),
   wherein the partial surface coating (2a, 2b) is deposited onto both surfaces (4a, 4b) of the foil (W)
   and wherein the adhesive surface coating (2a) of the one surface (4a) of the foil (W) is at least partly congruent to the adhesive surface coating (2b) of the second surface (4b), so that the foil in each case on both surfaces comprises coated and on both surfaces uncoated sections.
3. A foil according to claim 2, characterised in that the surface coating (2a, 2b) consists of points.
4. A three-ply, laminated sheet formation, containing as a middle layer a breathing-active, water-impermeable foil according to one of the claims 2 or 3.

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