Descrição da Aplicação

Os revestimentos e barreiras de vapor consistem em um composto multicamadas de material feito de diferentes têxteis não-tecidos, que são laminados com membranas de PU ou PE. Os revestimentos de telhados também podem ser a única proteção da construção contra os efeitos das condições climáticas por um período prolongado e funcionam como coberturas temporárias de telhado. Portanto, o material deve ser impermeável, e fornecer resistência alta e permanente contra diferentes condições climáticas e intemperismo. Isso inclui resistência à chuva, ao calor, e a radiação UV, flexibilidade em baixas temperaturas e estanqueidade do vento. O composto deve ser forte o suficiente para fornecer resistência permanente contra tensão mecânica. Os adesivos de laminação usados na fabricação de materiais têxteis para construção contribuem significativamente para a funcionalidade do produto. O desafio que o adesivo deve atender é a adesão excelente aos diferentes materiais e uma laminação forte e durável, sem prejudicar a permeabilidade de difusão do material têxtil.

A Jowat fornece soluções adesivas inovadoras para diferentes exigências: adesivos especiais com alta resistência UV para laminação de revestimentos de teto, hot melts sensíveis à pressão para laminação de materiais não-tecidos com diversas folhas, hot melts à base de PUR reativo com alta força de colagem e temperaturas de processamento baixas para colagem de folhas termoplásticas finas, bem como dispersões sensíveis à pressão com alta aderência na superfície e excelente coesão para folhas e materiais têxteis difíceis de colar.

 

 

Roofing liners and vapour barriers

Wherever adhesives are used in the manufacture of technical textiles, Jowat is the right partner. We supply a comprehensive range of innovative products to our customers, meeting the respective demands which the technical textiles have to comply with in the building industry. For lamination and coating, several thermoplastic and reactive hot melt and waterbased dispersion adhesives are used successfully.

One major area of application where adhesives are used in the building sector is the manufacture of roofing liners. These technical textiles are mostly composed of a laminated multi-layer mix of diverse materials. Depending on the installation environment in the roof, a structure promoting superior vapour permeability or a vapour barrier may be chosen.

The bonded compound has to withstand mechanical stress, must be for instance resistant against perforation due to walking, and ensure high durability when exposed to UV light. In practice, the most suitable adhesives have proven to be the polyolefin-based (PO) adhesives for lamination of polypropylene (PP) foils and fleeces. Polyurethane (PUR) hot melt adhesives are the products of choice for superior compound strength and excellent resistance to mechanical stress.

For bonded composites of fleece with a more open textile structure, like protective films for painting operations, pressure-sensitive hot melts are well established. These are above all characterised by their excellent adhesion properties, since substrates that do not adhere well, e. g. Polyethylene (PE) foils, are often used in this area.

Construction measures in road and dike building are often undertaken with fleece that has a reinforcement backing of netting. High stress is absorbed by a stable plastic netting, the spacing between the layers is assured by the fleece. The manufacturing process often requires the use of dispersion adhesives to assemble these layers. A high solid content guarantees short evaporation times and high initial strength.

Roofing liners protect the roof against external influences, function as a water-repellent layer and facilitate a proper ventilation of the roofing truss
tensioned sub-membrane on a roof

Informação do produto

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Base Viscosity [mPas] /
Temperature [°C]
Processing
temperature [°C]
Application UV Marker Download
technical
data sheet (PDF)
Jowat-Hightherm® 230.45 PO hot melt adhesive 11500 ± 2000 / 190 180 - 200 Fleece lamination, attic conversions. + de en
Jowatherm-Reaktant® 638.20 PUR hot melt adhesive 5500 / 100 90 - 110 manufacture of compound elements + de
Jowatherm-Reaktant® 639.00 PUR hot melt adhesive 10000 / 100 100 - 120 For the manufacture of compound elements in the textile industry. de en fr

The products listed only represent a limited selection of the available product portfolio. Product availability might differ by region. The technical data, characteristics and field of application provided in the table outline the differences between the individual adhesives of the product portfolio. Our Application Technology Department and our Sales Representatives are on hand to provide advice and support you finding the best adhesive for your particular application.

Note: The information on this page is based on test results from our laboratories as well as on experience gained in the field, and does in no way constitute any guarantee of properties. Due to the wide range of different applications, substrates, and processing methods beyond our control, no liability may be derived from these indications nor from the information provided by our free technical advisory service. Customer trials under everyday conditions, testing for suitability at normal processing conditions, and appropriate fit-for-purpose testing are absolutely necessary. For the specifications as well as further information, please refer to the latest technical data sheets.