Better health protection with modern adhesives - First PUR hot melt adhesive with hazard-free labelling for wrapping plastic window frames.


Over the past years, one-component, moisture-curing PUR hot melt adhesives have become widely established in profile wrapping. Now,   the first monomer-reduced PUR hot melt with hazard-free labelling   developed specifically for this field of application is available -patented, with outstanding technical data. 

Conventional reactive PUR hot melts that have been used successfully in many different industries and applications for decades contain monomeric diisocyanate, which is necessary for the chemical crosslinking reaction and largely influences the excellent bonding characteristics of those adhesives. However, the diisocyanates can lead to the formation of monomeric fumes of acute toxicity when the adhesive is melted. Appropriate precautionary measures are therefore necessary to protect the employees working in production. For instance by installing ventilation and extraction systems or by wearing appropriate protective equipment. Depending on the concentration, diisocyanates have an irritating effect on the skin, mucous membranes, eyes and respiratory tract. In addition, they may cause allergies.

Standard PUR hot melt adhesives generally have a residual monomeric content of approx. two percent by weight and are therefore declared hazardous materials and labelled with the GHS pictogram “Health hazard”. According to the currently applicable GHS requirements, products with a free monomeric diisocyanate content of no more than 0.1 percent by weight can have a hazard-free labelling.

S.W. has been supplying an extensive portfolio of monomer-reduced PUR hot melt adhesives not subject to hazard labelling for many years already. Adhesives from the S.W. 170 product line are already established in a wide range of applications, for instance in the furniture, automotive and textile industries as well as in bookbinding. They provide a broad spectrum of benefits: They are demanded for hazardous-substance-free production areas where conventional PUR adhesives cannot be processed. In other cases, they are specifically required by customers who are concerned about the use of hazardous substances in the manufacturing of their products. The training necessary for processing and the costs in time and money involved are avoided. A major reason to change to modern adhesives of course also lies in the protection of employees. In addition, the modern PUR hot melt adhesives from S.W. often also deliver a superior performance compared to the conventional alternatives.

Convenient for all who want a healthier production: Changing from a classic PUR hot melt to a new PUR MR hot melt adhesive is generally uncomplicated and several customers have already successfully made the change. The new S.W.170 can be applied using all established wrapping units with the usual processing parameters. It is compatible with a wide range of feed speeds from 6 m/min. up to 40 m/min. and provides maximum flexibility for processors.

Dr. Wang is proud of the new monomer-reduced product range from S.W.: “Our high-performance products with hazard-free labelling provide future-oriented technical solutions for the bonding processes of our customers, which take into consideration the constantly growing ecological and economic requirements and promote healthy manufacturing environments.”

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