HK1069416B

HK1069416B - Process and apparatus for treating textile surface, relevant coating agents and textile surface

Info

Publication number: HK1069416B
Application number: HK05101954.7A
Authority: HK
Inventors: Hans-Jürgen HÜBNER; Roland Lottenbach
Original assignee: Schoeller Technologies Ag
Priority date: 2001-02-02
Filing date: 2002-01-21
Publication date: 2006-12-22

Description

Method and device for treating a textile surface, associated coating agent and textile surface

The invention relates to a method for the surface treatment (Herstellung) of a fabric having hydrophobic properties on one side and hydrophilic properties on the other side, to an apparatus for use in such a method and to a coating agent for treating the surface of a fabric according to such a method and apparatus.

Textile surfaces having the above properties are known. In order to separate the hydrophobic areas of the fabric surface from their hydrophilic areas, a membrane of different structure is arranged between the two fabrics, which membrane is firmly connected to the fabrics. Because the processing involves multiple production processes, the processing of such fabric surfaces is very time consuming and expensive. In addition, the fabric surface is very hard, primarily as a result of the film being bonded to both fabrics, and therefore, processing is often difficult and limits its application. In addition, it has the disadvantage that the film acts as an intermediate layer in the garment, which hinders the transport of moisture from the inside to the outside, and at the same time, the garment often bulges due to the thickness of the material.

The object of the present invention is therefore to create a textile surface which is produced in a very simple and economical manner by means of special methods and/or devices and with a coating agent and which has a high degree of wearing comfort, wherein it is ensured in particular that moisture (feuchightakeit) is immediately absorbed on the hydrophilically treated side and distributed over a wide area and rapidly eliminated, while the hydrophobically treated side is water-repellent. The method used to achieve the above-mentioned object and the apparatus used for the method should be without difficulty and simple in terms of structural design, and the coating agent should also consist of only a few customary components, so that textile surfaces of different structures can be processed cost-effectively.

The process for the treatment of a fabric surface having hydrophobic properties on one side and hydrophilic properties on the other side is characterized in that: the fabric surface is hydrophilic throughout its cross-section; applying to one side of the fabric surface in a continuous process a size consisting of a viscous emulsion or dispersion of paraffin, silicone and/or fluorine compounds and penetrating only through a partial region of the cross-section; then, the layer of the slurry having hydrophobic properties, which forms the surface of the fabric, is fixed by a drying process (static).

According to another method, a first size consisting of a viscous emulsion or dispersion of paraffin wax, silicone and/or fluorine compounds is applied again continuously to one side of the fabric surface, after which the coating formed from the first size is fixed by a drying process, and then a second viscous size consisting of a hydrophilic polymer is applied to the other side of the fabric surface and fixed by a further drying process, wherein the two sizes each penetrate only through partial regions of the cross section in the fabric surface. Of course, in the present method, it is also possible to apply the second size to the fabric surface first and then apply the first size.

Another method according to the invention for treating a textile surface of the above-mentioned kind is characterized in that: continuously applying again a slurry consisting of a viscous emulsion or dispersion of paraffin, silicone and/or fluorine compounds to one side of the fabric surface, after which the coating formed from the slurry is fixed by a drying process; however, a liquid of a hydrophilic polymer is then applied to the other side of the fabric surface and fixed by an additional drying process to form that side of the fabric surface having hydrophilic properties, wherein the liquid can be applied to the fabric surface by means of a dipping bath, a coating roller or a spray head.

In this process, it is also possible to apply the liquid and then the size to the fabric surface, if desired as an emulsion or dispersion of paraffin, silicone and/or fluorine compounds and as a size of hydrophilic polymers.

In each case, the size was applied to the surface of the fabric using a coating blade.

The slurry may also be applied by spin-on-roll to one or both fabric surfaces, with the coating being applied to one side of the fabric surface and the printing (Bedrucken) being applied to the other side.

In the drying process, the surface of the fabric is subjected to the temperature of 80-200 ℃.

The apparatus using these methods is characterized in that: coating a slurry of a viscous emulsion or dispersion of paraffin, polysiloxane and/or fluorine compound, or a slurry of a hydrophilic polymer, each with a coating blade; and a liquid consisting of an emulsion or dispersion of paraffin, silicone and/or fluorine compounds or a liquid of a hydrophilic polymer is applied by means of an impregnation bath through which the surface of the fabric is passed, a coating roller or spray head rotating in a bath receiving the liquid, wherein, in the case of the impregnation bath, one or more pairs of pressure rollers should additionally be attached to the surface of the fabric.

The hydrophobic slurry which can be used as a coating agent in the process or apparatus of the invention should consist of 2 to 100 parts of a zircon emulsion containing zircon salt or 2 to 10 parts of a polysiloxane emulsion and 98 to 0 parts of water and 1 to 3 parts of a synthetic or natural thickener with a viscosity of 2000 to 15000mPa.s or of 2 to 100 parts of an emulsion or dispersion of a fluorine compound or fluoropolymer, 98 to 0 parts of water and 1 to 10 parts of a synthetic or natural thickener with a viscosity of 2000 to 15000mPa.s or the slurry should consist of a modified fluorocarbon (Fluorkarbon) with a solids content of 2.4% and a viscosity of 5000 to 10000 mPa.s.

The liquid to be used for the hydrophobic interaction can likewise consist of 1 to 100 parts of a zircon-salt-containing paraffin emulsion or 1 to 100 parts of a polysiloxane emulsion and 99 to 0 parts of water, but it can also be produced from 2 to 100 parts of a dispersion of a hydrophilic polymer, 98 to 100 parts of water and 0.5 to 4 parts of a synthetic or natural thickener having a viscosity of 2000 to 15000 mPa.s.

According to another formulation, the hydrophilizing liquid may also consist of 1 to 100 parts of a dispersion of a hydrophilic polymer and 99 to 0 parts of water.

Further, it is preferable that the slurry having hydrophobic effect is added in an amount of 30 to 100g/m²The temperature is about 140-170 ℃, and the contact time is at least 1 minute; the amount of the slurry with hydrophilic function is 30-100 g/m²The temperature is about 140-170 ℃, and the coating is coated on the surface of the fabric within at least 10 seconds of the contact time.

By using the method and apparatus according to the invention and a given coating agent, it is possible to form a fabric surface with very good hydrophobic and hydrophilic properties from only one layer of fabric and thus with a wide range of applications. By applying a coating agent with a hydrophobic effect on the textile surface, the provision of hydrophilic properties in the remaining area of the textile surface is made possible, so that the two areas fulfill the given very different functions.

Therefore, garments whose exterior is hydrophobic provide rain protection or can be used to walk through wet grass, which is also less prone to staining and easier to clean. On the other hand, the hydrophilic inner side of the garment absorbs a large amount of moisture in a short time, is distributed in a large plane, and can escape rapidly through the outside. Thus, garments made from the fabric surface processed according to the present invention have a high degree of wearing comfort.

The process for impregnating the surface of a textile with the method and apparatus according to the invention and the coating agent described is very cost-effective, which means an improvement in costs. In addition, the fabric surface is more adaptable to various applications, particularly in terms of material thickness, resulting in a very wide range of applications.

The figures show an apparatus for the method according to the invention, which will be described in detail below. Only schematic illustrations are given in the figures:

figure 1 shows an apparatus for applying a size to the side that renders the fabric surface hydrophilic,

FIG. 2 shows the apparatus according to FIG. 1, followed by a second inline apparatus for applying a second size to the other side of the fabric surface,

FIGS. 3, 4 and 5 show the apparatus according to FIG. 1, followed by a tandem apparatus equipped with a dipping bath or a coating roller or a spray head, and

fig. 6, 7 and 8 show the device according to fig. 3, 4 and 5, in each case followed by the device according to fig. 1.

The devices shown in fig. 1 to 8, which are designated in each case by A, B, C or D, are used for applying a hydrophobically acting pulp 11 or hydrophilically acting pulp 12, or hydrophobically acting liquid 21 or hydrophilically acting liquid 22, to a textile surface 1 which is hydrophilic over the entire cross-section, the devices being configured differently from one another.

The apparatus a according to fig. 1 or the apparatus A, A' according to fig. 2 consists of a reversing roll 2 and a backing roll 3 for conducting the hydrophilic fabric surface, a coating blade 13 or 14 and a dryer 4 or two dryers 4 and 5 connected in series with the coating blade 13 or 14. with the aid of the apparatus a according to fig. 1, a hydrophobic pulp 11 is applied to one side of the hydrophilic fabric surface 1 with the coating blade 13, the hydrophobic pulp 11 partially penetrating into the fabric surface 1 and being fixed in the dryer 4. Therefore, the side of the fabric surface 1 marked 1' is made hydrophobic, while the other side 1 "remains hydrophilic.

With the aid of a device a', which is shown in fig. 2, is additionally connected after the device a and is constructed in the same way, except that the hydrophilically acting pulp 12 is applied to the 1 "side of the fabric surface with an application blade 14, which hydrophilically acting pulp 12 is fixed in the dryer 5. As a result, the textile surface 1 has a hydrophobic side 1' and a hydrophilic side 1 ″.

In addition, it is also shown in fig. 1 and 2 that the hydrophobic 11 or hydrophilic 12 size can also be applied to the surface of the fabric by pressing. For this purpose, it is conceivable to use a pressure roller 31 or 32, shown in dashed lines, which is arranged in the region of the backing roller. Whereby the size 11 or 12 is continuously applied to one or both surfaces 1', 1 "of the fabric surface by a rotary press process.

According to fig. 3, the plant a has a plant B attached to it, which is equipped with a dipping bath 23 with reversing rolls 2' and 2 ". For this purpose, a tank 24 is filled with a liquid 22 having a hydrophilic action, through which the fabric surface 1 is passed by means of a reversing roll 2 "mounted in an immersion bath 23. In the dryer 5, the liquid 21 is fixed in the area of the fabric surface 1 that is not impregnated with the size 11, so that the fabric surface 1 once again has a hydrophobic active surface 1' and a hydrophilic active surface 1 ″.

In order to keep the energy consumption of the dryer 5 low, a pair of press rolls 25, 26 is additionally connected to the impregnation bath 23, via which the fabric surface 1 is drawn off. The pair of press rolls 25, 26 greatly reduces the moisture content of the fabric surface 1.

According to fig. 4, the liquid 22 contained in the tank 28 is applied to the fabric surface 1 by means of an application roller 27. In this process, two tension rolls 2' "keep the textile surface 1 pressed against the applicator roll 27 which absorbs the liquid 22, as a result of which the liquid 22 is transferred to the textile surface 1. In the dryer 5, the absorbed hydrophilically acting liquid 22 is fixed in the area of the fabric surface 1 which is not coated with the size 11, so that the 1' side of the fabric surface 1 is hydrophobic and the 1 "side is hydrophilic.

However, as shown in fig. 5, the liquid 22 may also be sprayed onto the fabric surface 1. For this purpose spray heads in the apparatus D are used, by means of which the liquid 22 is applied to the textile surface 1 in order to produce its hydrophilic side 1 ″.

According to fig. 6, 7 and 8, in each case the devices B, C and D each precede device a. According to fig. 6, a hydrophilically acting liquid 22 is permeated into the fabric surface 1 by means of a dipping bath 23, while the hydrophobicizing size 11 renders the side 1' of the fabric surface 1 hydrophobic. Shown in fig. 7 is a combination of devices C and a, functioning in the same manner.

It is, of course, also possible to apply the liquid 21 with a hydrophobic effect to the fabric surface 1 using the dipping bath 23 or the applicator roll 27, in which case the subsequently applied hydrophilic size 12 forms a hydrophilic film which absorbs moisture and is distributed over a large area.

By means of the device D in fig. 8, a liquid 21 with a hydrophobic effect is sprayed onto the fabric surface, said liquid 21 penetrating only a partial area of the fabric surface. As a result, the hydrophilically acting size 12 acts only on those parts of the textile surface which are not rendered hydrophobic, so that the textile surface 1 likewise has a hydrophobically acting side 1' and a hydrophilically acting side 1 ″.

Examples of coating agents:

the formulation of the coating composition according to claim 13, comprising:

1.10-30 parts of a paraffin emulsion containing zircon salt, 90-70 parts of water, 1-5 parts of a synthetic thickener such as a water-soluble polymer dispersion containing isoparaffin or a natural thickener such as hydroxyethyl cellulose; the viscosity of the slurry is 5000-10000 mPa.s, and the solid content is 2.5%.

2.10-30 parts of polysiloxane emulsion, 90-70 parts of water, 1-5 parts of synthetic thickener such as water-soluble polymer dispersion containing isoparaffin or natural thickener such as hydroxyethyl cellulose; the viscosity of the slurry is 5000-10000 mPa.s, and the solid content is 2.5%.

The formulation of the coating composition according to claim 14, comprising:

5 to 30 parts of an emulsion or dispersion of a fluorine compound or a fluoropolymer, 95 to 70 parts of water, 1 to 5 parts of a synthetic thickener such as a water-soluble polymer dispersion containing isoparaffin or a natural thickener such as hydroxyethyl cellulose; the viscosity of the slurry is 5000-10000 mPa.s, and the solid content is 1-4%.

The formulation of the coating composition according to claim 15, comprising:

100 parts of a mixture derived from modified fluorocarbons; the viscosity of the slurry is 5000-10000 mPa.s, and the solid content is 2-4%.

The formulation of the coating composition according to claim 16, wherein:

1.1-10 parts of paraffin emulsion containing zircon salt and 99-90 parts of water;

2.1-10 parts of polysiloxane emulsion and 99-90 parts of water;

3.1 to 10 parts of an emulsion or dispersion of a fluorine compound or a fluorine polymer, and 99 to 90 parts of water.

The formulation of the coating composition according to claim 17, comprising:

5 to 30 parts of a hydrophilic polymer having a solid content of about 20%, 95 to 70 parts of water, 1 to 5 parts of a synthetic thickener such as an isoparaffin-containing water-soluble polymer dispersion or a natural thickener such as hydroxyethyl cellulose; the viscosity of the slurry is 5000-10000 mPa.s, and the solid content is 1-6%.

The formulation of the coating composition according to claim 18, comprising:

1-20 parts of hydrophilic polymer with solid content of about 20% and 99-80 parts of water.

Claims

1. A method for processing a surface (1) of a fabric having hydrophobic properties on one side (1') thereof and hydrophilic properties on the other side (1 "), characterized in that:

the textile surface (1) is hydrophilic over its entire cross-section; the slurry (11) is processed by a continuous process at a rate of 30-100 g/m²Is applied to one side (1') of the fabric surface (1), said size (11) consisting of a viscous emulsion or dispersion of paraffin, silicone and/or fluorine compounds, which penetrates only through a part of the cross-sectional area of the fabric surface (1); followed by forming a layer from the slurry (11)A face (1') fixed in a drying process (4) to form a fabric surface (1) having hydrophobic properties, wherein in the drying process (4) the fabric surface is subjected to a temperature of 80-200 ℃.

2. A method for processing a surface (1) of a fabric having hydrophobic properties on one side (1') thereof and hydrophilic properties on the other side (1 "), characterized in that:

the first slurry (11) is mixed at a ratio of 30-100 g/m²In an amount to be applied continuously on one side (1') of the fabric surface (1), said slurry (11) consisting of a viscous emulsion or dispersion of paraffin, silicone and/or fluorine compounds; then the coating formed by the first slurry (11) is fixed in a drying process (4), wherein in the drying process (4), the surface of the fabric is subjected to the temperature of 80-200 ℃; then, a second viscous paste (12) made of a hydrophilic polymer is added at a ratio of 30-100 g/m²Is applied to the other side (1') of the fabric surface (1) and is fixed by a further drying process (5), wherein the size (11, 12) penetrates each only through a partial cross section in the fabric surface (1), wherein in the drying process (5) the fabric surface is subjected to a temperature of 80-200 ℃.

3. A method according to claim 2, characterized in that:

the second size (12) is applied first and then the first size (11) is applied to the fabric surface (1).

4. A method for processing a surface (1) of a fabric having hydrophobic properties on one side (1') thereof and hydrophilic properties on the other side (1 "), characterized in that:

the slurry (11) is mixed at a ratio of 30 to 100g/m²In an amount to be applied continuously on one side (1') of the fabric surface (1), said slurry (11) consisting of a viscous emulsion or dispersion of paraffin, silicone and/or fluorine compounds; thereafter, fixing the coating formed by the slurry (11) in a drying process (4), wherein in the drying process (4), the surface of the fabric is subjected to a temperature of 80-200 ℃; then, the liquid (22) of the hydrophilic polymer is added at a ratio of 30 to 100g/m²Is applied to the other side (1 ') of the textile surface (1) and is fixed in a further drying process (5) to form the side (1') of the textile surface (1) having hydrophilic properties, wherein in the drying process (5) the textile surface is subjected to a temperature of 80-200 ℃.

5. The method of claim 4, wherein:

the liquid (22) is applied to the textile surface (1) by means of a dipping bath (23), a coating roller (27) or a spray head (29).

6. A method according to claim 4 or 5, characterized in that:

the liquid (22) is first applied and the size (11) is then applied to the fabric surface (1).

7. A method according to claim 4 or 5, characterized in that:

an emulsion or dispersion of paraffin wax, silicone and/or fluorine compounds is applied as a liquid (21) and a hydrophilic polymer is applied as a slurry (12) to the fabric surface (1).

8. A method according to any of claims 1 to 5, characterized in that:

in each case, the size (11 or 12) is applied to the fabric surface (1) using a coating blade (13 or 14).

9. A method according to any of claims 1-5, characterized in that the size (11, 12) is applied to one or both sides (1', 1 ") of the fabric surface (1) by means of rotating press rolls (31, 32) on the fabric surface (1).

10. A method according to any of claims 1-5, characterized in that the size (11, 12) is applied to one side (1') of the fabric surface by coating (13) and to the other side (1 ") by pressing (32).

11. An apparatus for processing a surface (1) of a fabric having hydrophobic properties on one side (1') thereof and hydrophilic properties on the other side (1 "), characterized in that:

a slurry (11) formed from a viscous emulsion or dispersion of paraffin, polysiloxane and/or fluorine compound, or a slurry (12) composed of a hydrophilic polymer is coated with a coating blade (13 or 14), respectively.

12. An apparatus for processing a surface (1) of a fabric having hydrophobic properties on one side (1') thereof and hydrophilic properties on the other side (1 "), characterized in that:

a liquid (21) formed from an emulsion or dispersion of paraffin, silicone and/or fluorine compounds or a liquid (22) formed from a hydrophilic polymer is applied with the fabric surface (1) through an immersion bath (23) therein, a coating roller (27) or spray head (29) rotating in a bath (28) receiving the liquid (21 or 22).

13. The apparatus of claim 12, wherein:

one or more pairs of press rolls (25, 26) attached to the fabric surface (1) are added to the impregnation bath (23).

14. Coating agent for use in a method according to any one of claims 1 to 5 and an apparatus according to any one of claims 11 to 13, characterized in that:

the slurry (11) with hydrophobic effect comprises 2-100 parts of a paraffin emulsion containing zircon salt or 2-10 parts of a polysiloxane emulsion, 98-0 parts of water and 1-3 parts of a synthetic or natural thickening agent with the viscosity of 2000-15000 mPa.s.

15. The coating composition according to claim 13, wherein:

the slurry (11) with hydrophobic effect consists of 2-100 parts of emulsion or dispersion of fluorine-containing compound or fluorine polymer, 98-0 parts of water and synthetic or natural thickening agent with the viscosity of 2000-15000 mPa.s.

16. The coating composition according to claim 14, wherein:

the slurry (11) with the hydrophobic effect is composed of modified fluorocarbon with the solid content of 2.4%, and the viscosity of the slurry is 5000-10000 mPa.s.

17. The coating composition according to claim 14, wherein:

the liquid (11) with hydrophobic effect comprises 1-100 parts of paraffin emulsion containing zircon salt or 1-100 parts of polysiloxane emulsion and 99-0 part of water.

18. The coating composition according to claim 14, wherein:

the hydrophilically acting paste (12) consists of 2 to 100 parts of a dispersion of a hydrophilic polymer, 98 to 100 parts of water and a synthetic or natural thickener with a viscosity of 2000 to 15000 mPa.s.

19. The coating composition according to claim 14, wherein:

the liquid (22) used with hydrophilicity consists of 1 to 100 parts of a dispersion of a hydrophilic polymer and 99 to 0 parts of water.

20. A method according to any of claims 1 to 5, characterized in that:

the amount of the slurry (11) with the hydrophobic effect is 30-100 g/m²And is applied to the fabric surface (1) at a temperature of about 140 to 170 ℃ and for a contact time of at least 1 minute.

21. A method according to any of claims 1 to 5, characterized in that:

the amount of the slurry (12) having a hydrophilic effect is 30 to 100g/m²And is applied to the fabric surface (1) at a temperature of about 140 to 170 ℃ and for a contact time of at least 10 seconds.

22. A textile surface (1) having hydrophobic properties on one side (1 ') thereof and hydrophilic properties on the other side (1 "), characterized in that said textile surface (1) is hydrophobic over a partial area of the entire cross-section and hydrophilic over another partial area of the entire cross-section, wherein a size (11) is applied to one side (1 ') of the textile surface (1) in a continuous process, which size (11) consists of a viscous emulsion or dispersion of paraffin, silicone and/or fluorine compounds, and can therefore penetrate only through a partial cross-sectional area of the textile surface (1) to form the side (1 ') of the textile surface (1) having hydrophobic properties.