DE7025655U - COMPOSITE OF AT LEAST TWO FLEXIBLE PANELS OF PLASTIC-COATED TEXTILE FORMS. - Google Patents

Description

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DEUTSCT-ir? FORMERLY GOLD AND SILVER CUTTERS. ROESSLER Frankfurt a.M., Weissfrauenstrasse 9

■ \ Verbuni2 made of at least two flexible sheets made of plastic coated textile structures * ^ »

The invention relates to a firm and tight composite of webs or pieces cut therefrom made of plastic coated textile structures.

For the production of light, transportable structures such as tents, Air domes, large-area containers and the like so-called tarpaulin fabrics, which are flat structures made of plastics of various origins with liner or underlays Textile structures, used.

So far, for the connection of coated fabrics in the course of There are essentially three known methods of assembly.

First of all, sewing can be chosen as the connection method. At the Sewing becomes permanent, firm and also at higher temperatures, at least within the limits of usability the coating, non-material-resistant connection achieved, it must however, considerable disadvantages have to be accepted. First of all, sewing which is in and of itself rational only a maximum of 707 ° of the tensile strength of the coated fabric transferred into the seam. Furthermore, when sewing, the greatest advantage of the coated fabric is for the application, namely their absolute watertightness is destroyed, and a subsequent seam sealing has to be a complex and usually in the Effect of unsatisfactory work process can be connected. In addition, this is done through the coating Trapped tissues are exposed at the seam puncture points, allowing moisture to penetrate and reduce this over time Can cause harm.

The connection can also be made by welding. the

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: Concealment by means of a hot wedge, by high-frequency or

The hot gas process is the most suitable connection with PVC-coated fabrics. In general It is possible to produce a welded joint with a seam width of just 20 mm, which can withstand loads in the temperature range up to j approx. 30 ° C also in the endurance test the strength of the

j of stored tissue is reached or exceeded. The disadvantage of the

j welding seams "is due to the fact that yours is properly

proper execution is not always perfectly controllable and that the upper temperature limit of the permanent load capacity

the composite is quite low; In general, half of the short-term tear load according to DIN 53 35 ^ is used in the permanent load test A correct weld seam is only guaranteed up to a maximum temperature of 40 ° C. Venn also a burden from about 20 ° o the short-term tear load to about oO ° without slipping is tolerated in the interface, serious damage is caused to fabricated objects, such as air domes, Camping etc. did not occur due to the separation of the welded joint only because they were actually effective Loads are normally low and with increased loads, e.g. with strong gusts of wind, etc., mostly; no elevated temperatures occur in outdoor use. Since the materiel, however can easily heat up to temperatures between 70 and 90 ° C as a result of solar radiation, is a latent danger welded seam connections cannot be ruled out.

Finally, connections can also be created by gluing will. Compared to welding, gluing the sheets with PVC-coated carrier fabrics has no advantages whatsoever. Lap seams are more complex to manufacture and more resilient even more vulnerable than weld seams at higher temperatures. Therefore, the gluing is only for Coatings with non-weldable plastics Importance,

When sewing together, numerous small holes are created; the sewing connection is therefore not tight. So you already have the seam surfaces are welded shut with foil strips. But also

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This external seal does not eliminate all sources of error or leaks, except that the Folienstreifsn β carefully £ ίί · Γ *? -, v rsch- Rated Most ^"1 JT ¹ Jl possibly even on both sides of the seam connection in two stages? "If the seams inside tents etc. are unprotected or exposed at edges or intersections of the webs, moisture or liquid will be sucked in in a kind of wicking effect and possibly transported quite far. It can rot in damp or wet areas , Discoloration and also bursting of the seam or welded joints. Such sources of error are definitely avoided by the innovation.

This is because it was a composite of two or very flexible ones Sheets or pieces cut therefrom of plastic-coated textile structures found, which is characterized by this is that the overlapping ends of the webs or pieces and between them a protruding beyond these ends Strips of thermoplastic material joined together by one or more seams, one or both protruding sides of the strip. bent around the end (s), placed over the sewn points of the composite and welded there to the coated textile structure or structures are.

So you can connect webs, pieces or parts of coated textile structures in a surprisingly simple manner so that a liquid-tight or even largely gas-tight as well as durable and solid bond is achieved with a high degree of certainty. In addition, the sewn connection, which can be produced efficiently and quickly, is not impaired in any way. The new association is more solid and safer. For example, the two webs to be connected are first sewn together in such a way that a relatively thin strip, a band or the like between the sheets lying one on top of the other or overlapping at the ends made of PVC-based film is inserted during sewing.

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The strip protrudes so far beyond the panels on one or both sides that it protrudes over after the sewing Lay the seam around on one or both sides and then, for example, according to the high-frequency process snooping fsh. «? * Warden can.

For the production of the new composite not only two, but also three or more individual tracks, which can be of great advantage when building tents or halls, can be used and connected. For this purpose, for example, on the upper surface or optionally on both outer surfaces of the first composite, which is the ^r welded-on thermoplastic plastic strip, a further coated textile structure and optionally a further strip is placed and sewn overlapping with the composite. For this purpose, the strip that has already been prepared wider in advance is in turn bent, folded over and welded around the edge of the laid-on web. If necessary, the lower, now re-pierced welding surface must then be resealed. Of course, the combination of three strips (or possibly more than three strips) can also be produced at the same time, i.e. not in the two sections described, by immediately placing the plastic film strip between the three strips (i.e. in two spaces), then the seam is produced and finally the welding (top and bottom) is carried out as described above.

In principle, any method that is customary for welding thermoplastics can be used for welding will. For reasons of efficient production, the high-frequency welding process offers several advantages, because only one work step for the sealing welding of the overlaps on both sides is needed and at the same time the sewn webs on their facing sides with the one in between Weld the strips and finish off the seam stitches completely.

The textile structures of the composite are preferably made of woven fabrics

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synthetic fibers in linen, twill or other, also lattice-like, weaves; but also other well-known textiles Structures made of synthetic or natural fibers can be part

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advantageously a double-sided, so that the seam seal can develop their full effectiveness. The coating consists, for example, of plastic based on plasticizers Polyvinyl chloride or other thermoplastics.

For use as strip material for welding the seam surfaces The same plastics or very similar plastics compositions are preferably used. The for the Coating of the webs to be connected and the plastic mixtures used for the production of the strip material all common additives, such as stabilizers, plasticizers, fillers, pigments, antistatic agents, propellants, additives for Achievement of flame retardancy or self-extinguishing, etc. included. The strip material lies - preferably to save weight just enough thickness as a film. Of course, it can also be used to achieve greater strength or durability stronger foil material are used. In special cases, a reinforcement or ■ Cover in the form of a textile structure · of the types mentioned above be present in or on the strip.

The tarpaulin composite according to the invention has the following advantages.

Under normal conditions, the bond is essentially as strong as the carrier fabric used because the bond is primarily is accomplished by the weld seam. If the temperature is increased, the weld seam cannot slide off come because the sewing seam then still has about $ 70 of strength records.

By folding over both sides during production, the fabric edges of the webs to be connected are protected against penetration effectively protected by water. The perforation made when sewing

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is created during the subsequent welding. completely sealed again. There are also the wrapped strips of film or tapes are completely tight for their part, a completely water-impermeable composite can be produced. Of the Sewing thread is also made by the subsequent over-welding Protected from water, light and atmosphere and is therefore weatherproof encapsulated, so the same fatigue strength can be expected as the one coated on both sides in the given case Tissue.

All disadvantages associated with the ingress of moisture in or between the coating layers, such as rotting, Discoloration, immigration of microorganisms, etc. are avoided with certainty.

Ultimately, since the sewing seam is covered, a significantly better visual appearance is created compared to the only sewn composite.

The new, dense composite of webs or the like made of coated Textile structures can not only be used in the construction or construction of air domes, tents, tent and building roofs Are used, but also for all other possible uses of coated textile structures such as for flexible silos, liquid or floating containers, for Tarpaulins, automobile tarpaulins, life rafts, inflatables etc.

In all of these applications, the strength (thickness) of the coated Textile structure, as well as the film strip, depending on the intended use vary within wide limits, e.g. for the coated textile structures within the limits of about 0.3 to 3 inn or more and for the film strip between 0.1 min, or optionally even below that, up to about 1 mm.

The attached sample illustrates an exemplary embodiment the invention.

The two to be connected are coated on both sides with plastic.

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th textile structure (1) consist of a polyester fabric sit about 9 threads per cm in warp and weft of 1100 dtex (10000 den). You are on both sides with ? .R ,. et; a 250 g / m soft polyvinyl

id coated and. have a weight of. approximately

a thickness of about 0.05 mm.

An overlap width of 25 mm was selected at the seam, and it becomes a film strip (2) 75 "in width from a Soft polyvinyl chloride film with a thickness of about 0.5 is now used. It lies between the two partial surfaces that it is on both Sides protrudes about 25 mm. Are on the overlap area two seams at a distance of about 10 mm with a sewing thread made of polyester of strength Nm. 18/3 times and a number of stitches of around two stitches per cm (3). In the upper section of the pattern are the two protruding edges of the foil strips folded over and welded onto the seam zone by means of high-frequency welding (4). To make it easier to see, are below Part of the pattern is turning over the edges of the film strips (in front and on the back) and the welding has not been carried out.

As a result of the welding process, they are all lying on top of one another in the seam zone Partial areas connected to one another.

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Claims (2)

Protection claims 1. Multi-layer, planar composite of z - el or τ.εΛ, flexible, plastic-coated Ta:, <: 'l,? - 1üTc'.6n m in the form of strips, cut-outs from it or. r - "- '. e." I or-- ·' characterized in that the over:.: ^, eaae- ends of the webs, the blanks from them or the like uu * i between end up a thermoplastic strip protruding above them Plastic connected by one or more seams, one or both protruding sides of the Strip bent around the end or ends, placed over the sewn points of the composite and there with the or the coated textile structures are welded. 2. The composite according to claim 1, characterized in that on one or both outer welding surfaces another coated one Textile structure and, if necessary, another film placed on top, sewn to the composite and the - for this purpose is preferably wider - the strip is welded after it has been bent and folded over again. 3 composite according to claims 1 and 2, characterized in that that the textile structure is a fabric, preferably made of synthetic Fibers, which is coated on both sides with thermoplastic material. k. Composite according to claims 1 to 3 »characterized in that the strip is a film strip made of plastic of the same or similar composition as the plastic of the coating of the textile structure. PL / Gt-Pr
March 22, 1971 7121155-7.Ni 71