CS195434B1 - Method of manufacturing mats designed for bituminous waterproof insulations and roofings - Google Patents

Abstract

The invention relates to a method of making mats for the production of bitumen waterproofing and roofing

Description

The invention relates to a method of making mats for the production of bitumen waterproofing and roofing.

For the production of waterproofing bitumen insulations and for the production of roofing insulating boards, base materials, hereinafter referred to as mats of different kinds, are used, depending on the mechanical properties of the insulation. With low demands on tensile strength, extrusion and other tearing, cellulose or so-called rag board, sometimes bonded fiberglass fleece and glass fabrics are sufficient for the most demanding conditions, such as in the production of pressure water insulation. Glass fabrics have not been successfully replaced for these demanding purposes. Their production is very slow, demanding both in terms of investment and operation, not only because of the complexity of the preparation and weaving processes, but also because of the necessity of additional treatment, which must be prevented from slippage of the weft, respectively. warp threads, and even unwanted vacancies.

According to the invention, the above-mentioned drawbacks are overcome by the method of manufacturing mats for bitumen waterproofing and roofing.

It is based on the fact that a system of warp threads associated with a fraction of thermoplastic polymer fibers is laid in loops on a set of warp threads guided at a pitch of 2 to 20 mm, whereupon the laminate is subjected to heat and pressure.

A laminate composed of warp and loops of cargo yarns associated with a proportion of thermoplastic yarns may overlay the second yarn set preferably at the same pitch as the lower yarn set and offset by half the pitch.

The base yarns for the warp and the reinforcing loops may consist of mineral, in particular glass yarn, bulk glass yarn, glass silk or yarns of high-temperature-resistant polymers such as polyesters, polyacrylonitrile, the thermoplastic binder component being yarns of polyolefin, polyamide, vinyl polymers and copolymers thereof.

According to another feature, the loop forming yarns are coupled to the yarn by twisting at least two wraps per 1 m of length directly during removal from the bobbin, wherein the bobbin yarn is fed through the bobbin cavity or vice versa.

The connection of the whole formation is carried out by direct flame and the necessary pressure is then applied by conduction through the circumference of the cylinder under tension reached by the pulling device with possible pressing of the pressing cylinder, or by bonding due to heat and pressure by contact with the heated cylinder surface.

Finally, under pressure, the formation can be laminated with a web or web of heat-resistant fibers, such as glass, slag, basalt, metal, polyester, polyacrylonitrile fibers.

The process according to the invention makes it possible to increase the production speed by an order of magnitude over the existing fabrics production. It makes it possible to produce mats with excellent dimensional stability, low ductility in all directions, not just longitudinally and transversely, as is the case with fabrics, as well as fully satisfying easily adjustable strength. It is also possible to achieve not only excellent deformation properties, but also the need for full-area filling by simultaneous layering of the fiber web. Various variations of this method are described in the examples given below for carrying out the design of the production line.

The production method according to the invention is illustrated in the drawing, in which Fig. 1 shows the overall diagram of the machine, Fig. 2 shows another alternative of the overall machine design, and Fig. 3 shows another alternative of the machine in which the yarn assembly is fed from the warp roller.

Example 1

A set of threads 2 in the form of bulky glass yarns ^is fed from the creel 1 at a distance of 8 mm from each other, as shown in FIG. 1, onto this tensioned warp with a set of nozzles 3 throwing glass silk together with 5 at six times the speed of the warp. The formed layer of loops of glass and polyamide fibers 6 is overlaid with a fiber fleece 7 of polyester regenerated fibers having a total basis weight of 40 g / m 2 unwound from the pile 8. The resulting layer consisting of a warp of glass yarns, a mesh of glass and polyamide silk loops, and a polyester fiber web is fed to the perimeter of the roll 9 heated to 240 ° C, which rolls on the underlying cooled rollers 10 and 11. The interconnected formation as a reinforced mat is pulled and wound onto a roll 12.

The manufactured mat has excellent dimensional stability and the necessary strength in all directions and is used for bitumen impregnation in the production of bitumen waterproofing for particularly demanding conditions such as in the construction of shafts, tunnels and water structures.

Example 2

Similar to Example 1, a system of coils as shown in FIG.

Claims (6)

A method for producing waterproofing bitumen mats and a roof covering comprising at least two sets of threads, characterized in that a plurality of base threads associated with a proportion of thermoplastic polymer fibers are looped on loops of 2 to 20 mm pitched loops. whereupon the laminate is exposed to heat and pressure. 2. A method of making mats according to claim 1, characterized in that the laminated structure composed of warp and loops of base yarns associated with a proportion of thermoplastic yarns is overlaid with a second set of warp yarns, e.g. at the same pitch as the lower yarn set. displaced between the yarns of the base system. 3. A method according to claim 1 or 2, characterized in that mineral, in particular glass yarns, bulk glass yarns, glass silk or yarns of high-temperature-resistant polymers, such as polyesters, are used as the base threads for warp and reinforcing loops. polyacrylonitrile, wherein the thermoplastic binder component in the glass yarn in the form of spun yarns, at a distance of 12 mm from each other. On this warp 2, glass silk is cast by a set of nozzles 3, of which every fourth is unwound by silk polyamide in that the polyamide silk is guided from the creel 5 through the cavity of the conical coil onto the creel 4 with glass silk winding. The formed layer of loops of glass and polyamide is overlapped by a second warp of pre-woven glass yarns 13 and extends in the middle of the bottom warp gap so that the warp threads are 6 mm apart in the projection of the formation. The entire laminate 14 is guided over the gas burners 15 to a cooling cylinder 16, through which the mat is drawn off by a winding device and wound onto a roll 12. The manufactured mat has excellent mechanical properties, excellent strength, volume stability, it is well wetted with bitumen and is used for production of very demanding bitumen insulations especially against pressure water. Example 3 From the warp roll 17, a set of threads 2 in the form of glass silk is guided at a spacing of 4 mm. This warp is thrown by a set of glass silk swiveling nozzles together with a 25-Z polypropylene fraction. As in Example 2, the formation is overlapped by a second glass silk warp drawn from the warp bar 18 and extends in the center of the lower warp threads at the same 4 mm pitch. The entire laminate is guided along the circumference of the cylinder heated to 180 ° C and to a second heating section, on which the laminate comes into contact with the heated surface of the cylinder 19 by the other side. The connected unit is wound on roll 12, The manufactured mat has a low basis weight high strength, excellent dimensional stability and is used for the production of bituminous insulation, as well as lining walls and ceilings in construction production. Y N A L E Z U is a fiber made of polyolefins, polyamides, vinyl polymers and their copolymers. 4. Method of making mats according to items 1 to 4 3, characterized in that the base yarns are looped to the yarns by twisting at least two windings per 1 m of length directly during removal from the bobbin, the bobbin yarn being fed through the bobbin cavity of the base yarn or vice versa. 5. Method of making mats according to items 1 to 4, characterized in that the bonding of the whole formation is effected by a direct flame and the necessary pressure is then applied by guiding through the cylinder circumference under the tension achieved by the pulling device with possible pressing pressure by the pressing cylinder. 6. Method of making mats according to items 1 to 5, characterized in that when pressure is set of threads laminated with the web ¹ or batt of heat resistant fibers, for example glass, slag, basalt, .kovových, polyester, polyacrylonitrile fibers and thermoplastic fibers.