Wood & Furniture

3D coating of furniture using environmentally friendly, halogen-free films

As part of the project, the project partners examine sufficient-quality processing of polyolefin films as a substitute for PVC films in 3D coating for the furniture industry. The results illustrate that replacement of PVC film by eco-friendly, halogen-free films is feasible through coordinated use of materials and adaptation of the processing technology.

 

Summary

Due to easy processing and the broad range of applications, PVC-coated 3D furniture fronts are the state of the art in the furniture industry. In addition, they can be cheaply mass-produced and easily processed on all common membrane and non-membrane presses. However, due to their containing halogen-organic compounds, they have a progressively negative image and prohibit old furniture from being incinerated. Increased efforts were undertaken to render chlorine-free films usable for 3D coating using films based on polyolefin (PO), PET and acrylonitrile butadiene styrene (ABS).

The project pursued the objective of ensuring that processing of PO films achieves a quality sufficient to allow them to replace PVC films in 3D coating of furniture. To this end, the processing capacity of PO films was to be improved in regard to their employment in the furniture industry. Research comprised

  1. analysis of the technological parameters exerting a qualitative and quantitative influence on the weak points of the 3D process
  2. determination of physical characteristics of PO film adhesive bonding compared with PVC films
  3. optimisation of films, primers and glues
  4. derivation of technology measures for secure replacement of PVC films by PO films

The tests included climate tests, peel adhesion measurements and microscope examinations.

 

Results:

  • The adhesion quality is insuffucient for both film types.
  • Thermal analyses of the materials (films, glue, primer) showed that their behaviour is counter-effective to an optimal material bonding in the technologically relevant temperature ranges.
  • The different PE/PP proportions of the PO films can result in quality fluctutations at constant processing parameters.
  • Compared with the PVC films, the PO films display greater retraction during cooling after coating.

Project Participants

Implementing Institution

Konrad Hornschuch AG

Further Project Information

Project title: Verbundprojekt: Grundlegende Untersuchungen zum Verhalten von umweltfreundlichen PO-Folien im technologischen Verarbeitungsprozeß - Teilvorhaben 4

Project number: 01RC0054

Project period: 2001 - 2003

Project region: Germany (Baden-Württemberg)

Project contact:

Herr Dipl.-Ing. Weinert

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Source: German National Library of Science and Technology Hannover (TIB)