Kraiburg’s TPEs used for E&E cable system and caps for drinking bottles


Europe’s manufacturer of electrical connecting terminals, Conta-Clip Verbindungstechnik, has created a flexible cable entry system that comprises inlays and various seal elements manufactured using TPEs from Kraiburg TPE, which develops halogen-free flame retardant materials in accordance with UL94 and are rated as Category V0.

The halogen-free system offers users in the electric and electronic (E&E) industry a flexible and efficient solution for new installations and retrofitting of cables and hoses, as well as pneumatic and hydraulic lines in enclosures and control cabinets. The systems make use of no fewer than five different TPEs from Kraiburg: a PA adhesion-optimised Thermolast K compound for the system inlay seal, in addition to flame retardant and custom-engineered TPE materials for sealing elements.

“The KDSClick cable entry system was our first TPE project, so that we needed a competent partner who would provide us with optimal support, from the choice of a suitable material for the application, mold design, color matching all the way to series production,” says Jörg Nowastowski-Stock, Head of Product Management at Conta-Clip.

One of the challenges of the system was to ensure an absolutely reliable seal of the frame mounted on the control cabinet in accordance with IP 66 protection, as required in process and industrial automation. The frame consists of glass-fibre reinforced PA 6.6 and a TPE compound.

It was necessary to find a TPE material that enables excellent adhesion to polyamides and is soft enough to adapt to different surfaces in order to seal the system. Conta-Clip decided to use an adhesion-optimised TPE compound from Kraiburg TPE that is processed with the polyamide of the inlay in a two-component injection moulding process. The Thermolast K material features excellent adhesion and ensures a reliable seal even on painted or rough surfaces.

The system also includes seal elements of different sizes, which enclose the cables, hoses and lines. In close cooperation, Conta-Clip and Kraiburg optimised the design of the seal elements to achieve IP 66 protection. The slotted elements are designed for easy installation and exact enclosure of the cables without deformation.

The flame retardant Thermolast K materials used for the KDSClick system are self-extinguishing in accordance with UL94 and are rated as non-dripping (Category V0). In addition, the TPE compounds developed for the electric and electronic market are halogen-free in accordance with IEC 61249-2-21.

“The modular cable entry system from Conta-Clip is an outstanding example of the innovative commitment of our advanced Thermoplastic Elastomers,” says Dr. Thomas Wagner, Product Management EMEA at Kraiburg. “This project also emphasises our extensive development competence and our consistent customer orientation in support of high-end applications.”


Meanwhile, to ensure a sufficient intake of liquids for our well-being, the trend is to do away with disposable bottles and paper cups toward intelligently designed reusable containers of high-quality materials that are both pure and durable.

US-headquartered Timolino has introduced reuseable OmniLine and CruiseLine products available in diverse models of stainless steel, plastic or silicate glass for cold, hot and carbonated beverages. Different quick-release lids – from the classic Flip Top to the Screw or Dial Top, both with a tea strainer, as well as the Sports or Kidz Top with an integrated straw – fulfill specific requirements for the respective use.

All the lids feature a leak-proof seal, as a result of a special Thermolast K developed by Kraiburg for contact with foods and beverages. The TPE compound is used as a seal ring in the lids of the beverage systems or as part of a preformed, pressed in seal block. Like all parts of Timolino products, the sealing components are 100% neutral in taste and odour, free of bisphenol A (BPA), dishwasher-safe and recyclable. 


The application fundamentally required a technologically advanced seal compound with guaranteed compatibility with foodstuffs and a long life. The TPE compound used by the company fulfils the stringent requirements of the Code of Federal Regulations, Title 21 (CFR21) of the USA Food and Drug Administration (FDA) as well as EU directive 10/2011 for plastic materials and objects made of plastic. In addition, the material features an outstanding compression set throughout a broad temperature range. This property was decisive for sealing components that feature permanent resiliency and elasticity without embrittlement even after repeated contact with hot beverages, after cleaning in a dishwasher or at low refrigerator temperatures.

“For the market success of high-tech products such as drinking systems from Timolino, it is necessary to adapt the materials to the particular application as early as possible, which requires good knowledge of the market and active customer support,” says Josef Neuer from Product Management at Kraiburg. “That is why we insist on market- and customer-oriented formulations in the development of our materials that pave the way for innovative packaging solutions and speed up the market launch.”

In addition to lab and field data on the application-oriented material selection, Kraiburg says its supports its customers with a comprehensive service package from the concept through to market launch, including mould optimisation, processing recommendations and detailed migration tests for applications with food contact.


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