DE8329925U1 - SLIDING MATERIAL RAIL - Google Patents

Abstract

The material is tear-resistant, water vapour-permeable, water-tight, and hardly combustible, and is thus suitable in particular for building applications. It consists of synthetic, normally or hardly combustible, organic or inorganic fibres in the form of a sheetlike structure which is impregnated to be water-repellent and optionally flame-retardant.

Description

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Dipl-Phys. M. Becker ······· ····· '■ · ···· ^: S

Patent attorney Telephone ww 600306

6 83 29 925.4 February 8, 1984

A 3398 / v-schm

STAMM AG. CH-8193 EgIi sau

Underlay material web

The present invention relates to a Unterzugsmaterialbahn which mainly for building, for example, FLIR tiled roofs, steep roofs, curtain walls and for sealing against rain water, snow, dust, soot, etc _v d1ent.

Such material should meet the requirements to be fair, can be used on simple white and without special ventilation construction. The ventilation and ventilation gauze arranged above the joist should be enough to underscore each and every To report condensation.

Various materials are already on the market, which are used as a joist, but they are; did not want to fully satisfy them all. Beispiels- \ as are available perforated plastic films, with or without \ S fabric reinforcement. These films have a water vapor _{transmission coefficient k Q} of 0.261 to 0.436 mg / m hPa, so that condensation water repeatedly forms on the inside.

Finished kraft papers with and

offered as a support material without thread reinforcement.

Although these have a sufficiently high water vapor

2 transfer coefficients k_ of up to 26 mg / m hPa, however, they are insufficient in mechanical strength so that they are easy to work with break or tear. They are also easily flammable.

Fabrics and fiber fleeces coated with soft PVC are also used as the underlay material, which, however, have a water vapor transmission

2 have coefficients k _D of e.g. 0.065 mg / m hPa, so that special, complex ventilation constructions are necessary to prevent the formation of condensation to prevent.

Finally, plastic fleeces coated with bitumen are still on the market, although they are tear-resistant and are waterproof, but have a water vapor transmission coefficient kp of only about 0.125 mg / m hPa wise and are highly flammable.

The present invention was therefore based on the object to provide a support material that the does not have the disadvantages mentioned above.

The underlay material according to the invention is now characterized in that it is both tear-resistant and permeable to water vapor, such as waterproof, how flame-retardant and made of synthetic, normal or flame-retardant, organic or inorganic fibers in the form of a flat structure, which is water-repellent and, if necessary, impregnated to be flame-retardant. The material preferably has a

Water vapor transmission coefficient _{k n of min-}

2 at least 12 mg / m hPa and a tear strength of at least

1S at least 250 N / 5 cm, reaches combustion class V after VKF and remains tight under a column of water of at least 40 mm for at least 20 hours. Such a material rules out any form of condensation or condensation, and has one for the stress that occurs excellent tear and side tear resistance, is waterproof and flame-retardant. For easy installation, it is advisable to use the material in sheet form use.

Fiber fleeces, but also woven and knitted fabrics, are particularly suitable as flat structures. Can upon request the flat structure, preferably as a fiber fleece, are selected in such a thickness that an additional Thermal insulation is achieved. The fabric can as such, waterproof and flame-retardant impregnation or made from appropriately pretreated fibers

will be presented. If flame retardant fibers are used, flame retardant treatment is generally unnecessary.

For the production of the material according to the invention generally a sheet material such as a dense woven fabric, knitted fabric or non-woven fabric, e.g. Fiber fleece made of preferably 1.5 denier synthetic, normal or flame-retardant, organic, or inorganic fibers such as polyester or polyacrylic fibers or glass fibers, etc. with a Mixture of flame retardants, water repellants and binders impregnated by known methods, e.g. by dipping and squeezing off and then drying. The mixture can also be done with a squeegee applied or sprayed on under pressure.

Organic halogen compounds, such as, for example, are particularly suitable as flame retardants Chlorinated paraffins, polyvinyl chloride and bromine compounds, mixed with antimony oxide and aluminum hydroxide. Phosphorus compounds can also be used, especially organic ones, which do not wash out permit. Suitable water repellants are e.g.

Emulsions containing paraffins, fat-modified synthetic resins, Contains silicones or fluorocarbons.

To increase the watertightness, the fiber fleece or the woven or knitted fabric can be used prior to impregnation be provided with a water vapor permeable, compressed foam layer. One

such a layer can e.g. by applying a foam compound in the painting process and then compressing the one or two-sided coated Surface structure can be applied in a known manner.

If the foam compound contains a compatible water repellent, for example an aqueous one Fluorocarbon, which is added, can achieve good water tightness even without subsequent impregnation can be achieved. In this case it is advantageous to use a flat structure made of flame-retardant fibers or to use made of flame-retardant fibers or to treat the fabric accordingly beforehand, as described e.g. in Example 4 below. Such finished fabrics are also available in the stores.

example 1

A random fiber fleece web, consisting of polyacrylic fibers with a titer of 1.5 denier, which are needled with the finest needles in such a way that a uniformly dense needle fleece with a thickness of about 2 mm and a weight of 150 to 160 g / m is created in one The impregnation trough is immersed in an impregnation liquor and then squeezed between padding rollers so that the impregnation liquor absorbs about 290 % of the weight of the nonwoven. The impregnation liquor has the following composition:

Total Parts by weight Aqueous PolyacryldispeigLon, self-crosslinking medium-soft 110.00 Emulsion pvc powder 90.00 Tin stabilizer 1.80 Antimony oxide 50.00 Aluminum hydroxide 140.00 fat-modified synthetic resin emulsion 40.00 Catalyst to it 8.00 Iron oxide pigments 6.00 Raw water with 2 ml of 80% Acetic acid / liter 260.00 705.80

After being squeezed between the padding rollers, the web is dried in a tenter frame in a hot air duct, whereby care must be taken to ensure that the web is only tensioned to a minimum. The temperature in the hot air duct rises from 100 ^° C. at the entrance to 150 to 160 ^° C. at the exit. In order to achieve good drying, a high degree of air circulation and an appropriate air supply and discharge are necessary. In a 13 m long canal it is possible to travel at about 6 m / minute. After leaving the channel, the web is cooled and rolled up. The product obtained in this way, which can be produced in almost any color by appropriate selection of the pigment dyes, has good tear and tear strengths of 30 N / 5 cm in the longitudinal direction and 250 N / 5 cm in the transverse direction or 20 N in the longitudinal and 15 N direction in the transverse direction

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on, has a thickness of 1.5 mm and reaches after Test of the Association of Cantonal Fire Insurers CVKF) fire class V. The measured water vapor

2 passage coefficient kj> is 23 mg / m h Pa. The product is resistant to watering for two weeks in the laboratory without letting water through. It is also resistant to heat, cold and light.

By using a thicker fleece than mentioned above, thermal insulation can also be achieved will.

Example 2

A compound of the following composition is first made by homogeneous mixing with a high-speed stirrer manufactured :

Polyacryldispersiori (medium hard,

self-crosslinking)

Flame retardants based on Deca-

Weight point , 00 100 , 00 20th , 00 4th , 00 5

bromodiphenyl oxide / antimony oxide foam stabilizer (ammonium stearate) water

Total 129.00 25

This mixture is made according to known methods with a continuous foam mixer by whipping foamed by air to 200 g / liter and with a doctor blade on a roller 0.7 mm thick on a thermal bound random fleece made of polyethylene terephthalate fibers with a weight of 120 to 130 g / m and

a thickness of 0.3 to 0.4 mm, dried in a hot air duct 13 m in length at 70 to 135 ° C and immediately after leaving the heating channel in a warm state with a roller under a pressure of 6 bar compressed. The web speed is 6 m / minute.

Then, as in Example 1, it is impregnated and dried. The material obtained has similar properties with regard to water vapor permeability, tear strengths and flame resistance as that from Example 1, but an increased water resistance of over 20 hours under 100 mm water column.
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Example 3

A finely needled random fiber nonwoven web consisting of polyacrylonitrile fibers, as in example 1 described, is coated with a squeegee on a rubber blanket with impregnation compound. It is done as follows procedure :

The speed of the driven rubber blanket will be set so that this the Fleece transported so that it is not stretched, which is clearly visible in the fact that the coated Fleece after the rubber blanket "sags" somewhat, which means that there is only a very weak longitudinal pull through the The weight of the fleece arises.

Furthermore, the flow behavior of the impregnation compound is adjusted so that it does not completely

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but only about 2/3 of the thickness penetrates, which is an application amount of about 330 g of impregnation compound

2
(wet) per m. If this were to penetrate completely through the fleece, the wet fleece would slide on the rubber blanket and would no longer be transported without distortion.

The thus coated fabric is conducted shortly after the blanket with the lowest possible longitudinal and transverse tension in a tenter frame and dried condensed with increasing temperature of 150 to 170 ⁰ C and about 50 seconds at 170 ⁰ C in a hot air channel. Subsequent to the hot runner, the still warm material is smoothed with a roller under 6 bar pressure.

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The reverse side (second side) is then coated in the same way. It is advantageous to when the impregnation compound has a slightly lower viscosity than that for the front side (first page). The amount of impregnation compound applied is around 640 g (wet) per m.

The impregnation compounds are prepared as follows:

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First page zwe ite Since e

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Parts by weight '

aqueous, self-crosslinking- J

de polyacrylic dispersion f

40 S (medium soft) 100.00 100.00 Decabromodiphenyl oxide / antimony oxide dispersion

40.00 40.00 Alumina hydrate 230.00 200.00 Fluorocarbon dispersion, aqueous 20.00 20.00 Pigments (pre-dis- pergates) 5.20 5.20 Acetic acid 80 Ug 1.80 1.80 "Ukaprint K" (Schill & Seilacher, D-Böblingen) 9.00 9.00 Raw water 160.00 160.00

566.00 716.00

To produce the mixtures, the raw water is first acidified with the acetic acid and removed from it 100.00 parts by weight with the "UkapTint K" (dispersant) stirred until a homogeneous solution is obtained. In this solution the aluminum oxide hydrate becomes and pigments are homogeneously dispersed with a high-speed stirrer. There will be 41.8 parts by weight or 221.8 parts by weight for the second side of the acidified raw water, then the polyacrylic dispersion, then the decabromodiphenyloxide / antimony oxide dispersion and finally the fluorocarbon

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Dispersion, premixed with the remaining 20.00 parts by weight acidified raw water.

Compliance with the working method (sequence) is very important for the stability of the mixture, which, however, has to be stirred well before use.

The product obtained according to Example 3 has the following properties: Tear strength in the longitudinal direction 448 N / 5 cm, in the transverse direction 404 N / 5 cm · The tear strength is 15 N in the longitudinal and 17 N across. The measured water vapor

2 rate coefficient k «is 21 mg / mh Pa. The material is tight under 100 mm water column for over 20 hours. Burning class V according to VKF, also at 200 ⁰ C.

Example 4

An impregnation mixture consisting of flame-retardant and water-repellent agents is applied to a thermally bonded random fleece consisting of polyethylene terephthalate fibers, as described in Example 2, with an air knife so that the fleece fibers are completely enclosed by the impregnation mixture. The application quantity is approx. 460 g (wet) per m. It is then dried in the tenter in the hot air duct at an increasing temperature of 150 to 180 ^{° C.} Now, in the same operation, on a second coating point with "doctor blade on steel roller", a mechanical,

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by blowing in air to 300 to 350 g / liter foamed mixture, consisting of aqueous self-crosslinking polyacrylic dispersion of flame-retardant and hydrophobing agents, pigments and foam stabilizer in a thickness of 0.5 to 0.6 mm, corresponding to approx. 200 g (wet) per m ² , spread onto the pre-impregnated and dried fleece, then dried and condensed for 30 to 50 seconds in the second tenter frame and hot air duct at a rising temperature from 120 ⁰ C at the entrance to 180 ⁰ C at the exit, as well as still warm directly behind the hot air duct with a Roller compressed under a pressure of 4 to 6 bar. It is then cooled using a cooling roller and rolled up.

The impregnation compound for the precoat (first line) according to Example 4 is made according to the following recipe prepares:

30 parts by weight of "Ukaprint K" (Schill & Seilacher, D-Böblingen) are converted into 115.00 parts by weight Raw water is clearly dissolved with stirring, then added with constant stirring and stirred until homogeneous : 110.00 parts by weight of E-PVC powder, 2.00 parts by weight Tin stabilizer (for PVC), 40.00 parts by weight of antimony trioxide, 150.00 parts by weight Aluminum oxide hydrate, 6.20 parts by weight of pigments, which were previously made into a paste in water, then becomes Stirred for 5 to 10 minutes at high speeds until a homogeneous mixture is obtained. To be

with continued stirring, 310.00 parts by weight of raw water and 4.00 parts by weight of ammonia were added, then 25.00 parts by weight of a soft, self-crosslinking polyacrylic dispersion, then 18.00 parts by weight Polyacrylic acid thickener mixed with 35.00 parts by weight of raw water and finally with 2.00 parts by weight of aqueous fluorocarbon dispersion with 10.00 parts by weight of raw water. The whole mixture is stirred until it is completely homogeneous. she is so ready to use, but should be stirred again after standing for a long time before use.

The mass for the foam layer according to Example 4 is made according to the following recipe:

First, 2.00 parts by weight of "Latekoll AS" (BASF) with 4.00 parts by weight of 50 tiger aqueous ammonium stearate stirred homogeneously. 10.00 parts by weight of an aqueous, self-crosslinking, medium-hard one are added to this mixture Polyacrylic dispersion given and also stirred homogeneously. Then are added in sequence and each Stirred homogeneously: another 40.00 parts by weight of the same polyacrylic dispersion, 50.00 parts by weight of an aqueous, self-crosslinking, hard polyacrylic dispersion, 11.20 parts by weight of a homogeneously dispersed mixture of 5.20 parts by weight of pigment Cz-B. Iron oxides) in 6.00 Parts by weight of water, 10.00 parts by weight of an aqueous decabromodiphenyloxide / antimony oxide dispersion, 6.00 parts by weight of an aqueous fluorocarbon dispersion. Continue stirring until the components are homogeneously mixed. This mass should be stirred well before foaming.

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The product obtained according to Example 4 has
the following properties:

Tear strength in the longitudinal direction 446 N / 5 cm, in the transverse direction 400 N / 5 cm. Tear strength in the longitudinal direction 38 N, in the transverse direction 30 N. Water vapor transmission coefficient kp: 26 mg / mh Pa.
Burning class V according to VKF. The material remains under
a water column of 100 mm for 20 hours. 10

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Claims (7)

• · I If - 15 - Claims for protection 1.Bank material web, especially for construction applications, characterized, that they are made of a tear-resistant, water-vapor-permeable, waterproof and flame-retardant surface structure consists of synthetic, normal or hardly combustible, organic or inorganic fibers and is water-repellent and, if necessary, impregnated to be flame-retardant. 2. Underlay material web according to claim 1, characterized in that the sheet-like structure consists of a fiber fleece. 3. Underlay material web according to claim 1, characterized in that the sheet-like structure consists of a woven or knitted fabric. 4. Underlay material web according to one of the preceding claims 1 to 3, characterized in that that the thickness of the flat structure is chosen so that it also has a heat-insulating effect. 5. Underlay material web according to one of the preceding claims 1 to 4, characterized in that that the fabric is waterproof and flame retardant impregnated. · <· * · «* ■ * * l | titi • (Ill • a · · · ι · Ill · III Il - 16 6. Underlay material web according to one of the preceding claims 1 to 5, characterized in that that the fabric to increase the water resistance at least on one side with a Water vapor permeable foam is coated and the whole material is water repellent and is impregnated to be flame retardant. 7. Underlay material web according to one of the preceding claims 1 to 6, characterized in that that they have a water vapor transmission coefficient k _n 2 ο of at least 12 mg / m h Pa at 23 C and one Has a tear strength of at least 250 N / 5 cm, reaches combustion class V according to VKF and below one A water column of at least 40 mm remains tight for at least 20 hours. -fr? ac ee deeeees