New method for sealing surfaces

A surface coating system from Kurz offers increased surface protection for plastic parts

It does not always need to be wet lacquering - it is also possible to protect plastic surfaces against abrasion and chemicals without the use of a lacquering facility. At K 2010, the surface finishing expert Kurz will be presenting a protective lacquer on the roll that is applied by simple means in a dry process.

This new product is a further development of earlier dry lacquers and offers significantly higher abrasion and scratch resistance. According to Kurz, it delivers equally effective surface protection to conventional high-performance protective lacquers. This clear, dry lacquer is available in the product grades HP(High Performance) Topcoat and UP(Ultra Performance) Topcoat. HP Topcoat and UP Topcoat fulfill the stringent requirements of a large variety of industries. They are suitable for coating extruded plastic sheets as well as white goods, plastic furniture components, auto accessories and consumer electronics devices.

HP Topcoat is a thermoplastic lacquer that is also suitable for semi-finished products that are deep-drawn in a later work operation. UP Topcoat is a UV-cured top coat for surfaces that require especially high abrasion and scratch resistance, for example plastic sheets in the furniture industry, washing machines and fridge doors. Further information about the durability characteristics of these products can be obtained by requesting a detailed technical specification from the supplier.

Lacquer transfer by means of hot stamping

HP Topcoat and UP Topcoat are transferred in a hot stamping rather than lacquering process. The dry lacquer film is released from a carrier foil under the action of pressure and heat, and stamped onto the plastic substrate. This process offers numerous advantages to the processor. It delivers both surface protection and an impeccable finish. The foil transfer operation produces a consistently smooth and homogeneous lacquer layer. And the dry transfer process requires no solvents. This eliminates costly disposal fees, and assists processors in complying with VOC guidelines. The process can be implemented with only a relatively minor investment as no lacquering stations, extraction systems, drying tunnels or cleaning systems are required. The only requirement is a hot stamping machine, which can be production-ready after just a short setup time.

No pre-treatment is required for the plastic parts, and the lacquer transfer occurs in a single work operation. Coated parts can be used straight away as no drying times are required. The surface is protected immediately since the dry lacquer layer cannot be contaminated with dust or mechanically damaged. This significantly reduces scrap levels. The reduction in the number of work operations also saves energy costs. In addition, the cleaning steps required with conventional lacquering become unnecessary. Coating with HP Topcoat and UP Topcoat is therefore a cost-effective production process and an efficient means of durably protecting surfaces from mechanical and chemical stresses.
To find out more, visit the KURZ booth A19 in Hall 5 at K 2010.