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A sealing device with a weldable fiber-based layer

A technology of sealing device and outer layer, applied in the field of roof membrane, can solve problems such as increasing installation cost

Active Publication Date: 2021-05-14
SIKA TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even in the case where the films are provided with longitudinal film edge edges, some seams formed between overlapping portions of adjacent films must be bonded by adhesive and / or sealed by using sealing tape, which increases installation cost

Method used

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  • A sealing device with a weldable fiber-based layer
  • A sealing device with a weldable fiber-based layer
  • A sealing device with a weldable fiber-based layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0090] According to one or more embodiments, the waterproof layer consists of a composition comprising:

[0091] a) thermoplastic elastomer components P and

[0092] b) at least one elastomer E,

[0093] Wherein the thermoplastic elastomer component P comprises at least one thermoplastic elastomer P1.

[0094] The ratio of the amounts of the thermoplastic elastomer component P and the at least one elastomer E depends on the intended application of the sealing device. Increasing the proportion of at least one elastomer in the polymer base of the composition improves the flexibility of the waterproofing layer. This may be advantageous in some applications, for example in the waterproofing of roof structures.

[0095] According to one or more embodiments, the composition of the waterproof layer comprises as a polymer base the following:

[0096] a) 25 - 85 wt%, preferably 35 - 80 wt%, more preferably 45 - 75 wt% of thermoplastic elastomer component P and

[0097] b) 5 - 60 w...

Embodiment

[0182] An exemplary fleece-backed TPO membrane was prepared by thermally laminating a nonwoven layer composed of polypropylene fibers on the back of a commercially available TPO membrane and an in-house fabricated flexible TPO membrane. The weldability was tested with the prepared TPO films laminated with nonwovens of different thicknesses on the back side. The results of the solderability test are shown in Table 2.

[0183] TS 77 is a TPO based multilayer roof waterproofing sheet available from Sika Schweiz AG.

[0184] Non-woven fabrics composed of polypropylene fibers are known under the trade name RKW Obtained from RKW Hydrospun (Germany).

[0185] Flexible TPO membranes were prepared according to the procedure described below.

[0186] Preparation of flexible TPO membrane

[0187] Flexible films were produced using a laboratory-scale extrusion-calendering apparatus consisting of a twin-screw extruder (Berstorff GmbH), a flat die and a set of water-cooled calender...

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Abstract

The invention is directed to a sealing device (1) comprising a waterproofing layer (2) comprising at least one thermoplastic elastomer P1 and an outer layer of non-woven fabric (3) directly adhered to at least portion of the second major surface of the waterproofing layer (2), wherein the outer layer of non-woven fabric (3) comprises at least one polymer P2. The invention is also directed to a method for producing a sealing device, to the use of a layer of non-woven fabric comprising or essentially consisting of polypropylene fibers for reducing blocking of a waterproofing layer comprising at least one propylene-based thermoplastic elastomer, and to a method for covering a roof substrate using the sealing devices of the present invention.

Description

technical field [0001] The present invention relates to the field of waterproofing underground and above-ground structures through the use of polymeric seals. In particular, the invention relates to roofing membranes which can be used to provide single or multi-ply roofing systems. [0002] Background of the invention [0003] In the field of construction, polymer sheets, often referred to as membranes or panels, are used to protect underground and above-ground structures, such as basements, tunnels and flat and low-slope roofs, against water penetration. For example, waterproofing membranes are applied to prevent water from entering cracks in concrete structures due to building settlement, load deflection, or concrete shrinkage. Waterproofing roof membranes for flat and low-slope roof constructions are generally supplied as single-layer or multi-layer membrane systems. In single-layer systems, the roof substrate is covered with a roof membrane consisting of a single barrie...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B5/02B32B25/08B32B25/10B32B25/18B32B27/08B32B27/12B32B27/32
CPCB32B27/08B32B27/12B32B27/322B32B2260/021B32B2260/048B32B2270/00B32B2307/31B32B2307/7265B32B2307/732B32B2419/06B32B2581/00B32B5/022B32B25/08B32B25/10B32B25/18B32B27/32B32B2262/0253B32B2307/718E04D5/10
Inventor R·罗斯卡姆普S·舒恩布洛特A·弗吕克O·科内贝尔
Owner SIKA TECH AG