Application Description

Closures and straws must be easy to remove as well as reliable. And just like beverage cartons, they are available in a very wide variety. Consumers are therefore provided with a broad range of different flip and screw caps, as well as different designs of drinking straws to suit every taste. Adhesives play an important role in facilitating an appealing exterior appearance and easy handling of the packaging, cap, and straw. Due to the special challenges in the manufacturing process, they have to meet high requirements. The bonding operations of caps as well as straws are characterised by constantly increasing line speeds and a rising variety of different materials. Therefore, the adhesives have to ensure a high initial strengths as well as a good adhesion to different substrates with low application amounts. High resistances of the adhesive to ambient conditions like heat, low temperatures, and water are also necessary to ensure optimum and permanent adhesion after hot filling and subsequent cooling processes. Another requirement of paramount importance: compliance with food contact regulations.

Powerful Jowat® CAP adhesives are characterised by high thermal stability in the melt, high flexibility at low temperatures, and high heat resistance, as well as a very broad spectrum of adhesion. The special hot melt adhesives are available in pillow form with several benefits to processors: An easy and clean, and compared to blocks, a less time-consuming processing, as well as substantially reduced packaging waste. Jowat® CAP adhesives are nearly odour- and colourless, and approved for direct food contact.

The development of the cap on beverage cartons

Cap adhesives in pillows

Jowat Cap adhesives can be purchased in the additional supply form of pillows.  The supply form will not modify the technical properties (like adhesion, cohesion, viscosity etc.) in any way at all. All Cap adhesives can of course be used in direct food contact (FDA 176.170). 

The adhesive pillows are manufactured by coextrusion. In this process, a raw material already contained in the adhesive formulation is used as exterior protector material. This allows to reach a good antiblocking effect, without any need to modify the adhesive formulation.

Product Information

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.