DE1560759A1 - Process for the production of a strip or sheet material - Google Patents

Description

Patent attorney

Karl-Α. Brose

P f. ¹ - »ng.

Wiener Str. 2.-T * Munich 790570

B / Mü. Münohen-Pullach, May 27, 1963

8645/25

Dr.Expl-l

Societe anonyme dite: ETABLISSEMENTS D. DUOARIF, Comines, (Northern) France - *

Process for the production of a strip or web-shaped material

There are already composite materials known by the union of one or more deposits of, for example, a network shape with one or more plastic films or paper layers getting produced. The main advantage of these known materials is that they are a compared to non-reinforced foils have increased strength.

The invention relates to a new material of the type mentioned at the beginning Art, although it differs from the known materials in that it has the properties of a textile has c

This means in particular that the fabric produced according to the invention is folded like a light linen or cotton fabric or can be crumpled up and then spread out again without any visible changes.

In addition, the material produced according to the invention can be subjected to essentially all types of treatments, which are also used on textiles. This includes bleaching, dyeing, finishing, making moisture impermeable, treating on inseparability, treating to achieve protection against decay, satining, embossing, etc.

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Although the material according to the invention in comparison to the conventional Textiles causes significantly lower production costs, its tensile and tear strength corresponds essentially that of textiles.

The invention, which relates to a method for producing a strip or web-shaped material of the type described, consists essentially that a fabric-like, but preferably non-woven insert or a net-like arrangement is manufactured with the help of machines which are suitable for the production of fabric-like, non-woven arrangements, wherein this insert is made of threads that consist of continuous or discontinuous filaments and has good strength have against changes in shape. The insert obtained in this way is impregnated with an adhesive, which is preferably consists of a diversion of resin in water · The viscosity of the adhesive is chosen so that, not the Form meshes of the insert spanning veil, but the adhesive is also not chosen so viscous that it Pulls strings. A quick-setting clearing agent is preferred used. On both sides of the inlay impregnated in the manner described, a thin layer is now made from individual or from only lightly applied by a binder interconnected fibers existing layer, after which the adhesive dried thereby is that the material is preferably guided over at least one heated roller. If this is desired, the finished material can be subjected to additional impregnation which makes it suitable for all treatments that can also be applied to textiles.

At the same time, the invention relates to a new material which is in the form of a strip or web and essentially the properties

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of a cloth or fabric and the one described above Way is made. This material is characterized in particular by the fact that it has an insert, for example in net form, which is preferably made up of threads of good quality Resistance to changes in shape exists, which with each other after, kind of nonwoven fabric connected, being an of this insert with the help of an adhesive, preferably based on synthetic resin, two thin fiber layers, e.g. made of cellulose or viscose fibers are attached.

According to the invention, the insert can be produced by a method made of non-woven fabrics, because interlinings of this type have the advantage that they are in the direction of the warp thread are flatter than is the case with normal fabrics of the 3? all.

it is known that nonwoven fabrics are made up of one or more Layers of tensioned warp threads are produced (which for this reason remain straight) and that on this arrangement in Weft running threads with lower tension are applied, with the attachment to the warp threads with the help an adhesive takes place.

If you have an insert or a net made this way is, with a conventionally woven insert, for example made of linen, if you compare, you can see that the warp threads as well as the weft threads, but the latter with restrictions, run in a straight line, while in a conventional linen fabric both the warp and weft threads

at are sinusoidally curved, with also / the woven net-like Arrangement for establishing a connection between the threads an adhesive is used.

It follows that when a deposit on which the

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Faeerlagen are glued on, a moistening and then one Drying is exposed, variously large shrinkage phenomena occur in a linen insert, in other words is called djeev that the length of an insert is different than that of the fiber layer enveloping the insert.

In contrast to this, with a non- woven arrangement there is no shortening (mämmmg * $ in the direction of the warp and the length of the insert and fiber layers are essentially of the same order of magnitude, so that the material has better homogeneity and quality.

The phenomenon that the change in length in the direction of the warp after moistening and drying is greater in woven fabric than in a non-woven arrangement, results from the fact that in the non-woven arrangement the change in length is only caused by the change in length of the threads, while the change in length in a woven fabric, it is the result of the sum of the change in length of the warp threads and the change in length that results from the different levels of moisture absorption ("rmimmmtp) .

Of the various known- processes for the manufacture of nonwoven arrangements is preferably used to practice the invention in which the weft threads between two layers of tensioned warp threads are placed against the weft threads from both sides.

Such non-woven arrangements are preferred according to the invention, because they allow the production of better quality end products »This is based on the fact that the Surface of such deposits is very flat and that the passageway

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layers can be applied very evenly to it.

The non-woven insert as proposed according to the invention is also preferable to woven interlining because it is not as thick at the points of contact between the warp and weft threads. This is especially true when compared to Interlinings that are woven in the manner of gauze and that are commonly used when the interlining is to have large meshes.

To implement the invention, it is necessary that the insert consists of threads which have good resistance to dimensional changes exhibit. This means that the insert is made from threads that move when moistened, dried or when heated change only as little as possible in terms of their length.

According to the invention, so-called palynosic fibers can advantageously be used be used. These are chemical fibers based on structurally homogeneous cellulose with microfibrils that either from continuous fibers or from short lengths of fiber can be made, the latter being obtained by breaking continuous fibers «,

Of course, it is also possible to use other threads made of materials which do not undergo any significant changes in terms of their dimensions. It is also possible to use synthetic threads, for example those made from superpolyamide. These threads are normally only poorly resistant to changes in shape, but their dimensions can be determined by a suitable prior treatment _e

The purpose of impregnating the insert is essentially on the one hand the creation of a bond between the weft and the warp of the

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non-woven insert and on the other hand the connection of the insert with the Paserschi ducks

According to the invention, the impregnation is preferably carried out with the aid of an aqueous dispersion which, for example, has a Acrylic resin, chloroacetate vinyl, chlorovinyl or synthetic latex contains.

The adhesive that is used must be very pliable after setting and must not break. In addition, should the adhesive adheres well to the threads of the insert and to the fiber layers

It is recommended to use a quick-setting adhesive, in order to prevent the adhesive from penetrating through the fiber layers that cover the insert, because this would make the finished product a bad one Have surface, and that, on the other hand, the layer of warp threads, which lies under the insert, does not differ from the weft threads separates and then does not return to the correct position. Of course, this applies to a non-woven insert, in which the weft threads lie between two layers of warp threads.

Finally, it is advisable to adjust the viscosity of the adhesive as a function of various characteristics listed below to choose ο

First of all, it must be an adhesive that does not have too high a viscosity, so that thread formation in this way which would significantly affect the quality of the end product.

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In addition, as is common practice, attention must also be paid to it care must be taken that no continuous adhesive film forms on the insert. It is therefore necessary to adjust the viscosity of the KiebmitteX so that the formation of such There is no veil.

For this purpose and for reasons of precaution, it is also possible to blow a stream of air onto the insert after it has passed through the adhesive bath has passed through to create AdhesiveMutchen or to destroy veils that could possibly be formed in different places.

Although one does not systematically focus on the finished product a special structure due to the "presence of over." Layers of plastic material extending the entire length of the insert to be given is the formation of an adhesive lexer on the insert nevertheless harmful, because such veils occasionally and only form in certain places, so that when such a Veil tears, the forces released in the process cause deformation of the network forming the insert. This is also one of the reasons why using a fast setting adhesive is required.

The pasers hurried, those on the one passed through the adhesive Insert can be of any type. Cellulose or viscose fibers are advantageous. The concerned Layers can be prefabricated, the fibers being connected to one another with the help of a light adhesive. It but it is also possible to produce the fiber layers on the spot and apply them directly to the insert «,

In a preferred embodiment of the invention, the Drying of the adhesive is done by removing the insert

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and arrangement consisting of fiber layers is passed over one or more drying drums.

The product obtained in this way can last, preferably within the manufacturing process, be subjected to any treatment corresponding to that on Textiles is exercised, for example a bleaching process, a dyeing process, an impermeabilization, a treatment to reduce flammability, finish, etc.

For a better understanding of the invention, an embodiment is shown below explained, but this does not represent any limitation of the invention. The course of the procedure is graphical shown in the drawing.

In the figure, 1 denotes the machine, which is used to produce a net-like non-woven insert, at which the warp threads lie on both sides of the weft threads.

In this known type machine, the single weft thread 2, which is unwound from a spool 3, with the help of a rotating Arms 4 placed around two Eandfäden 5 and 6, which are stretched parallel to each other. The speed of rotation of the arm 4 is matched to the speed at which the end threads are moving forward so that the weft threads are sufficiently tight lying next to each other "

The warp threads are in two arrangements 7 and 8 over two rollers 9 and 10 brought up to the arrangement.

In the tried and tested production was both for the chain as well as the weft, a polynosian thread of 400 deniers

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applies, which is commercially available under the designation B X. It should be noted that under one denier is weight is understood in grams, which weigh 9000 meters of the thread in question.

The arrangement obtained in this way forms a kind of network in which the distance between the warp and the weft threads is about 5 mm.

The insert is passed through a bath 11 with adhesive, The rollers 12 and 13 are used for guidance.

The adhesive in bath 11 is at room temperature and has the following composition:

50 $ dry extract of warm
vulcanizable acrylic carboxyl resin

25 kg

Thickener based on
Starch-hydroxyethylamidon r _k

Water 30 1

Additive to prevent foaming 50 ecm

The inlay impregnated with adhesive is on the exit side the roller 13 passed under blow nozzles 14, which serve to Veils of adhesive, which are in different grid sizes may have formed to destroy.

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- ίο -

With the help of the rollers 15 and 16, two layers 17 and 18 are made Cellulose wadding with a weight of about 20 grams per square meter is applied to the insert.

'The assembly obtained in this way passes over a drying cylinder 19' which is heated to 14O ⁰ C and about 80 centimeters in diameter measures "The advancing speed of the material web is 2 meters per minute.

The product, which is dry after being circulated around the roller 19, can already be sold. If so desired, can however, the material web can also be subjected to an after-treatment in which it runs through an immersion bath in the tub 20. at In the embodiment described, the product is colored and made impervious to moisture.

For this purpose there is a mixture of the dye alizarin in the vat 20 in a concentration of 20 grams per Liter and a dispersion of 80 grams per liter of synthetic Wax,

The material web then runs through a drying channel 21 approximately 4 meters long, in which a temperature of approximately 150 ^° C. prevails.

The finished product is wound up at 22.

The material obtained according to the invention can be used for a variety are used for purposes for which "long-known textiles" were required. The one produced by the process according to the invention For example, material is excellent for making objects that are textile-like, but only

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be used for a limited time. The low price of the end product produced according to the invention allows the to use objects made from them only once and then to throw them away when they are dirty

It is therefore possible to use the white fabric produced according to the invention Manufacture napkins, toilet paper, tablecloths, rags, work gloves, work clothes, raincoats and the like. All these items can be thrown away after use or when they are largely soiled.

It is also possible to subject the material produced according to the invention to various physical treatments, for example to provide more or less large perforations, in order to influence the material properties in this way

Of course, the description of the special example of the river leads The invention is not limited to this. Rather, the invention can be used within the framework of the basis on which it is based Thought can be supplemented, improved and modified in a wide variety of ways. ·

In particular, it is possible according to the method according to the invention Manufacture workpieces in which several deposits or fiber layers lie on top of one another.

Of course, it is also possible to use the invention in the Modify way that the interlining consists of only one layer of warp and weft threads.

All details described and shown are essential to the invention. ■: ■■ _ ■ *

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Claims (8)

Claims 1. Process for the production of a strip or sheet Materials, characterized in that a fabric-like, however, preferably non-woven net-like insert is made from a thread material that changes its dimensions only as little as possible, then on this insert a preferably fast binding adhesive is applied and a layer of thin fibers is applied to both sides of the insert impregnated in this way and that the adhesive is then is brought " 2. The method according to claim 1, daduroh gekennseiohnet that the Interlining made from a non-woven arrangement of weft threads that lie between Iwei arrangements of warp threads. 3. The method according to claims 1 and 2, daduroh gekennseiohnet, that the insert is made of polynosiaohsn continuous or interrupted fibers 4 · Process according to claims 1 to 3 »daduroh gekennseiohnet, that the viscosity of the adhesive is adjusted so that the adhesive does not penetrate the fiber layers. 5. The method according to claims 1 to 4, daduroh identified, that the viscosity of the adhesive is adjusted so that the adhesive does not form threads. 6. The method according to claims 1 to 5, characterized by that the adhesive is chosen so that it is pliable after setting and both on the threads of the insert as well as on 9 0 9 8 U 9/1 1 9 S BAD QRiGiNAL - 13 Paser layers firmly adheres. 7. The method according to claims 1 to 6, characterized in that that as an adhesive an aqueous dispersion of acrylic resin, vinyl acetochloride vinyl chloride or synthetic Latex is chosen. 8. The method according to claims 1 to 7, characterized in that the fiber layer made of cellulose or Viscose is made. 909849 / $ 118 Blank page