In the building technology, technical textiles also have to provide certain functions like tight seals, vapour barriers and absorbency of mechanical stress. The physical structural properties determine the ambient climate and can only be guaranteed by a secure compound of multiply textiles with suitable adhesives.Living comfort and energy efficiency play an increasing role in building projects. Building textiles can provide important functions in this regard: Roofing liners protect the roof against external influences, function as a water-repellent layer and facilitate a proper ventilation of the roofing truss. Vapour barriers don’t let anything go through and ensure that the requirements of the blower door test which measures the airtightness of buildings are met.
Jowat provides innovative adhesive solutions for different requirements: special adhesives with very high UV resistance for laminating roofing liners, pressure-sensitive hot melts for laminating nonwovens with diverse foils, reactive PUR hot melts with high bonding strength and low processing temperatures for bonding thin thermoplastic foils, as well as pressure-sensitive dispersions with high surface tack and very high cohesion for difficult to bond foils and textiles.
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.
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.