Body and handle made entirely of rPET
Bottle with glued-in handle for home care & food
recyclable and
made of rPET.
KHS has further developed its rPET containers for the home care and food sectors. In addition to bottle handles slotted into place mechanically, the Dortmund company now offers a glued-in process: stretch blow moulded using the preferential heating method, the bottle is claimed to be more stable than the extrusion-blow-moulded polyolefin alternatives currently available on the market. Glued-in handles also require a simpler contour than the clip-in variety.
The development of the 2.3 l PET bottle with a glued-in handle is the result of a one-and-a-half-year cooperation between KHS and Logoplaste Innovation Lab. The aim was to design a bottle specifically for home care products with the smallest possible carbon footprint. With its ready-for-market system, KHS and Logoplaste Group wish to support the industry’s striving for greater sustainability.
“Our adhesive technology enables us to cut down on the amount of energy and material used in production and manufacture a container that’s both more stable and visually more appealing than the standard products currently available on the market,” says Sebastian Wenderdel, PET sales business development manager at KHS in Hamburg, Germany. Direct comparison reveals that up to 30% fewer resources are used in the manufacturing process, with 10% in material saved over a clip-in handle. Instead of producing the bottle on an extrusion blow moulder as is common, stretch blow moulding it is particularly energy efficient – a not inconsiderable advantage in view of the rising prices for energy and raw materials.
In conjunction with preferential heating KHS claims to provide a precise and reliable piece of plant equipment. This tried-and-tested, energy-efficient heating method permits homogenous distribution of the material during the stretch blow moulding process in plastic bottles with an irregular and complex design, thus lowering the number of resources used and boosting bottle stability. Neck alignment with millimeter accuracy as an optional component allows precise product dosing with the help of oriented spout caps. Furthermore, as the new PET bottle does not have any seams – as opposed to those on standard containers made of HDPE or PP – it has proved convincing in rigorous in-house drop tests, claims Wenderdel.
When selecting a suitable adhesive, the design team drew on the years of expertise accumulated by KHS during the Nature MultiPack project. The container provides a further plus when it comes to product marketing. “The transparent PET material makes the product visible,” Wenderdel states. Moreover, customers can have their very own bottle designed with the help of KHS Bottles & Shapes service program.
Moving towards a circular economy
With the development of its new PET bottle with a glued-in handle KHS is moving closer towards a circular economy. With this system, the company wishes to not only address manufacturers of home care products but also food producers. “We provide a circular container whose bottle body and handle consist of 100% recyclate and are themselves fully recyclable. This is still fairly unusual for containers with an integral grip,” emphasises Wenderdel.
