Uygulama Açıklaması
Destekleyici bir rol - Glulam için özel yapıştırıcılar
Binaların yük taşıma sistemleri için ahşap eleman üreticileri, büyük zorluluklarla karşılamaktadır. Bir tarafta üretim süreci özel standartlara tabi olup kullanılan yapıştırıcıların inşaat için onaylı ve sertifikalı olması gerekmektedir. Diğer tarafta ise, ister kurtağzı isterse laminasyon olsun her uygulama benzersiz gereksinimlere sahiptir. Jowat, yapıştırılmış lamine ahşaptan (GLT veya Glulam) çapraz lamine ahşaba (CLT), masif yapı ahşabından i-Kirişlere kadar farklı uygulamalar ve ürünlere özel olarak adapte edilmiş tek bileşenli, nemle kürlenen poliüretan prepolimer yapıştırıcılardan oluşan bir ürün portföyün sahiptir. Jowapur® serisi bu yapıştırıcıların performansı seri üretiminden önce karmaşık prosedürlerde kapsamlı bir şekilde doğrulanmıştır. Özel içeriği, özellikleri ve işleme parametrelerinde dolayı bu yapıştırıclar, yük taşıyan glulam üretiminde farklı uygulamaların taleplerini karşılamaktadır. Örneğin, Jowapur® serisinden çeşitli özel yapıştırıcılar, kısa işleme sürelerinden dolayı hızlı ve esnek üretim süreçleri için özellikle uygundur. Diğer ürünler uzun açık montaj süresi sağlayarak büyük parça ve büyük partilerin üretilmesini temin etmektedir.
Poliüretan yapıştırıcılar, yük taşıyan ahşap parçaların üretilmesinde çeşitli avantajlar yanı sıra kondansasyon reçineleri gibi diğer sistemlere göre üstün bir ürün kalitesi sunmaktadır. Hiçbir şekilde formaldehit içermemekle birlikte %100 katı içeriği sayesinde çok daha az gramajlarda uygulanabilmektedir. Buna ilaveten, prepolimerler, oda sıcaklığında birkaç dakika içinde kürlenebilmekte ve renksiz görünümleri sayesinde gizli bir yapışma hattı sağlamaktadır.
Jowapur® yapıştırıcıları tek komponent olarak işlenmektedir. Çok fazla hazırlanmış yapıştırıcı için gereken karıştırma, kap ömrü ve yapıştırıcı kalıntıları artık geçmişte kaldı. Minimal köpüklenme, üst üste veya yan yana yerleştirildiklerinde lamellerin yapışmalarını önler ve temizlik süresini büyük ölçüde azaltır. PUR prepolimerler, kurtağızlarının üretim ve kürlenme sırasında preslendikten sonra kayarak ayrılmalarını önleyen lifler ile güçlendirilmiştir. Bu yapıştırıcılar akmaz ve temassız uygulamalar için son derece uygundur. Jowat, yük taşıyan glulam üretimi ve tüm standart uygulama teknolojileri için özel yapıştırıcılar sunmaktadır.
Ürün Bilgileri
Get more information one our new certified portfolio for fingerjointing and laminating
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| Base | Viscosity [mPas] / Temperature [°C] | Max. Assembly Time [min] / Temperature [°C] | Application | Certificate |
Download technical data sheet (PDF) | |
|---|---|---|---|---|---|---|
| Jowapur® 686.20 | 1-Component PUR Prepolymer | 10500 / 20 | 10 / 20 | Manufacturing bonded load-bearing timber structures (Fingerjointing) | Adhesive Type: EN 15425–I–70–FJ–0.1–w | de en fr |
| Jowapur® 686.30 | 1-Component PUR Prepolymer | 10500 / 20 | 15 / 20 | Manufacturing bonded load-bearing timber structures | Adhesive Type: EN 15425–I–70–GP–0.3–w | de en fr |
| Jowapur® 686.60 | 1-Component PUR Prepolymer | 10500 / 20 | 45 / 20 | Manufacturing bonded load-bearing timber structures | Adhesive Type: EN 15425–I–70–GP–0.3–w | de en fr |
| Jowapur® 681.10 | 1-Component PUR Prepolymer | 15500 ± 2500 / 20 | 10 / 20 | Manufacturing bonded load-bearing timber structures | Adhesive type: EN 15425–I–70–GP–0.3–w | de en fr |
| Jowapur® 681.60 | 1-Component PUR Prepolymer | 15500 ± 2500 / 20 | 60 / 20 | Manufacturing bonded load-bearing timber structures | Adhesive type: EN 15425–I–70–GP–0.3–w | de en fr |
| Jowapur® 681.40 | 1-Component PUR Prepolymer | 15500 ± 2500 / 20 | 40 / 20 | Manufacturing bonded load-bearing timber structures | Adhesive Type: EN 15425–I–70–GP–0.3–w | 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.
News & Articles
High-performance gluing - Certified PUR adhesives for load-bearing glulam
The importance of load-bearing glulam in construction has been growing constantly over the years. Its use in new buildings is increasing and structures based on load-bearing glulam have become bigger and more sophisticated. At the same time, it provides possibilities for architectural creativity and aesthetics that are often unmatched. The adhesives specialist Jowat from Detmold is supporting this sustainable trend with an expertise based on many years of experience, with optimum service and with certified high-performance adhesives.
One family for all cases
The one-component PUR prepolymer adhesives of the Jowapur® 681.xx product family are certified according to EN 15425:2017 and are tailor-made to optimally meet the requirements for load-bearing glulam. They can be used in fingerjointing as well as in CLT/laminating applications, provide a choice of assembly times between 10 and 60 minutes, and facilitate an assembly time-pressing time ratio of up to 1:1. Industrial processors can therefore choose the adhesive that best fits their parameters to optimise their specific process and to either increase capacity or improve process reliability by only changing the adhesive and without the need for major investments.
PUR – Full of benefits
Compared to other technologies, PUR prepolymer adhesives for the manufacture of load-bearing timber parts provide several advantages in the manufacturing process as well as for the end product. They do not contain any formaldehyde or solvents, are free of emissions and completely odourless when fully cured, and require considerably lower application amounts due to a solids content of 100 %. Depending on the formulation, these adhesives can cure in a short period of time at room temperature already and facilitate almost invisible gluelines due to their colourless appearance. In addition, Jowapur® adhesives are processed as single components. Therefore, no mixing is necessary, pot lives become obsolete, and remnants from production are prevented.
A major secret behind the superior performance of the Jowapur® 681.xx product family are specially developed reinforcement fibres which are added to the adhesive in a specific procedure. Those fibres increase the strength of the glueline and help prevent the joined parts from sliding apart during production and curing. In addition, they lower the amount og foaming during the curing process and thereby considerably reduce the soiling of machines and equipment and help prevent the sticking together of parts that have been stacked or stored next to each other. The improved spread characteristics of these adhesives makes them an optimal choice for contactless applicator systems in fingerjointing units.
Sustainable construction
Jowat is confident that the importance of load-bearing glulam in construction will only continue to increase in coming years – partly due to global sustainability strategies. That development is to be supported with optimised high-performance adhesives. “Building with wood brings only benefits,” underscores Ralph Kirst from Business Development Load-bearing Glulam at Jowat SE. “And adhesive bonding is a future-oriented joining method that minimises construction costs and time in timber construction. Entire buildings can be prefabricated industrially and assembled on site.” Wood as a building material is therefore expected to continue on its upward trajectory. Apart from the economic benefits it provides, the material is also an ideal choice from an environmental point of view. Wood is a sustainable CO2 sink and thus actively supports the fight against global warming.
The article is published in the magazine ''Holzkurier 35/2020" in German language. You can download the original article down below.
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