DE2543047A1 - Waterproof polyurethane-coated textile clothing - with watertight seams and resistance to chemical cleaning agents - Google Patents

Abstract

Waterproof clothing comprises pieces made of textile material coated with pure polyurethane and joined together watertightly by welded seams contg. an intermediate material pref. pure linear polyurethane. The pieces may be further joined together by a thread seam which is sealed off by the welded seam. The two pieces of material are joined together by hf welding with interposition of a PVC layer or by ultrasonic welding with or without interposition of a polyurethane or PVC layer. Pref. a strip of the intermediate material is laid between the two pieces of material prior to welding and stitching is performed prior to laying the intermediate material.

Description

Waterproof protective garment and method for its

Manufacture For some time now, artificial leather-like, breathable Flat materials available made from plastic-coated textile carrier material exist. The textile carrier material can be a woven fabric, a knitted fabric or a fiber fleece be. Polyurethane is particularly well suited as a plastic for the coating, because linear polyurethane in particular is soft and in a wide temperature range is elastic, has a pleasant grip and can be dry-cleaned.

The use of the above-mentioned, coated with polyurethane (PU) Materials for waterproof protective clothing have so far failed because it is not was possible, the blanks forming the respective item of clothing were flawless to be connected to each other in a watertight manner. A conventional seam with thread (thread seam) is by nature not waterproof and its sealing with swellable threads, glued on or deposited sealing strips and the like. Has not yet succeeded perfectly. So far it was not possible to connect the blanks or to seal of the thread seams by welding, as there are laminates, their coating consists of pure polyurethane, could not be welded properly.

Attempts have been made to improve the weldability of such laminates to be improved by adding polyvinyl chloride to the polyurethane of the coating admixed. Although this measure improves the weldability, it can be done But then no longer dry-clean laminates.

The present invention is accordingly based on the object a waterproof protective garment and a method for its manufacture indicate where perfectly watertight joints are guaranteed, without impairing the resistance to cleaning.

This task is placed under protection in claim 1 Protective clothing and the method put under protection in claim 2 solved.

Ausftihrungsbeispiele the invention are referred to below explained in more detail on the drawing; The figures show: FIG. 1 an exemplary embodiment of a jacket-like protective clothing according to the invention and Fig. FIG. 2 shows a schematic representation of the production of a welded joint in FIG Manufacture of a protective garment according to the invention.

Fig. 1 shows the embodiment of the invention, a jacket 10, which can have a conventional cut. The jacket is made of a layered material 12 made, which consists of a carrier web 14 and one applied to it, preferably microporous, breathable polyurethane layer 16 is made.

The carrier web 14 can be made from a fully synthetic fiber fabric, knitted fabric or fleece made of polyamide, polyester, polyacrylic and the like. The polyurethane layer is preferably made of relatively soft, resilient linear polyurethane and is preferably only superficially connected to the carrier web (so it is soaked the carrier web is not essential), so that the sheet material is soft and stretchable as well as has a good grip. The one inside, which does not contain any coating material Side of the carrier web feels comfortable, so that a high level of comfort is guaranteed is.

The individual pieces of sheet material that make up the jacket 10 are connected to one another at connection points or seams 18. To a high mechanical The seams contain strength and a perfect seal 18, such as Fig. 2 shows, both a conventional thread suture 20, which is the mechanical Ensures strength, as well as a weld that runs roughly along the dashed line Line 22 (Fig. 2) runs.

The welding can be done with high frequency or ultrasound. Ultrasonic welding is generally preferred. To a flawless To ensure the welding point, is between the to be welded Blanks 24, 26 (Fig. 2) an intermediate material 28 is provided in the form of a strip, in the production of the thread seam 20 similar to a hem strip or a Piping can be sewn in with. In the case of high-frequency welding, the intermediate material must consist of PVC. With ultrasonic welding, both PVC and polyurethane film, in particular crystal clear PU film made of preferably linear polyurethane is used will.

In this case it is the durability of the finished garment Guaranteed against chemical cleaning agents.

The ultrasonic welding takes place by means of a bar-shaped, Sonotrode 30 shown in cross section in Fig. 2, which e.g. an excitation coil 32 can be excited to vibrate ultrasound. The excitation coil 32 is fed by an alternator 34 having a power of, for example have about 700 W and have an alternating current with a frequency of e.g. 23 kHz can. The length of the sonotrode (perpendicular to the plane of the drawing in FIG. 2) can, for example 5 to 10 cm.

The ultrasonic welding process described allows perfect, fully waterproof and mechanically very resistant, elastic weld seams produce. The elasticity ensures that tensile forces act on the connection point after the initial stretching of the weld joint area from the conventional one Threaded seam 20 are recorded, so that the stress on the weld seam remains limited.

In special cases, ultrasonic welding can also be carried out without intermediate material be # clocked through.

The ultrasonic welding process can also be used successfully with others Use plastics.

The welding processes described above can also be used for padding attach, for example, between the sleeve 36 of the jacket 10 and one on the elbow area for reinforcement attached film piece 38 is arranged.

The padding consists of weldable fiber material, e.g. from Acrylic fiber that is sprayed with a material such as PVC when it is high-frequency welded can be, which has a high dielectric loss factor. With ultrasonic welding accordingly, wadding materials that use ultrasonic welding are used allow. You could of course also use a conventional padding Connect a seam or glue to the sleeve and then to the padded area put on a piece of foil and weld it tightly at the edges. Appropriate Pads can be placed in the area of the knees and / or on trousers or overalls be provided on the back of the buttocks and the thighs and lower legs.

The invention can of course not only be applied to jackets, as one is shown for example in Fig. 1, but also to others Protective clothing and the like, e.g. also life jackets and the like. The carrier web does not, of course, need to consist of purely synthetic fiber material, but can also be made from a mixture of synthetic and natural fibers or only from natural fibers, like cotton. The use of the intermediate material 28 is particularly then of great advantage if the coating is relatively thin, because of the intermediate material it can then be ensured that the carrier web in the area of the weld is saturated with plastic, creating a secure and tight connection results.

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Claims (7)

A p r u lio ns 1. Waterproof protective clothing, d a d u r c h g e k e n n n z e i c h n e t that there are blanks (24, 26) from a with im essentially pure polyurethane (16) coated textile carrier material (14) contains, by preferably an intermediate material (28) containing weld seams (22) are connected to one another in a watertight manner. 2. Method of joining two blanks from one with essentially pure polyurethane-coated textile carrier material, especially for production a protective clothing item according to claim 1, d a d u r c h g e -k e n n z e i c h n e t that the connection is made by high-frequency welding with an intermediate layer a PVC layer or by ultrasonic welding with or without an intermediate layer a polyurethane or PVC Schioht takes place. 3. Protective clothing according to claim 1, d a d u r ch g e k e n It should be noted that the intermediate material is pure polyurethane. 4. Protective clothing according to claim 3, d a d u r ch g e k e n It should be noted that the polyurethane is a linear polyurethane. 5. Protective clothing piece according to claim 1, d a d u r ch g e k e n n z e i c h n e t that the blanks (24, 26) finally through a thread seam (20) are connected to one another, which is sealed by the weld seam (22). 6. The method of claim 2, d a d u r c h g e -k e n n z e i c n e t that between those to be connected Cut to size before welding a strip of the additional material (28) is inserted. 7. The method according to claim 6, d a d u r c h g e -k e n n z e i c h n e t that the blanks are made before welding and the interleaving of the strip be sewn with thread.