Textile & Clothing

Manufacture of fibres and sheet textiles using micro-additive-doped polyethyleneterephthalate (PET)

The synthetic polyester fibres developed combine an unprecedented degree of permanence in UV protection with low levels of skin irritation at an acceptable price. This product opens up new market opportunities for the entire textile production sector. 


In the light of increasing rates of skin cancer associated with occupational or voluntary exposure to the sun, increased protection against ultraviolet (UV) radiation is required.  Clothing which is capable of filtering out the harmful elements of UV radiation has the potential to contribute significantly to preventative measures.

The object of the complex overall project described here was the development and testing of products which will provide long-term UV protection in use, whilst eliminating the problems of skin sensitivity associated with the use of finishing agents.  At the same time, it was intended that the addition of titanium dioxide as a delustering pigment should be reduced.  The production of titanium dioxide micro-particles for commercial use has also been undertaken.

In the course of this subproject, four polyethyleneterephthalate granulates were doped with different contents of titanium dioxide, micro-titanium dioxide and a mixture of these two pigmenting agents, then worked into filament yarns which were tested for their processing properties.


  • Processing properties and filament formation obtained using this system showed no significant deviations from commercial types of PET.
  • The micro-titanium-doped product showed a slight improvement in strength in comparison with conventionally delustered PET.  There were no specific observations regarding colourability and receptiveness to dyes.
  • The micro-titanium dioxide pigments have a positive influence upon the mechanical properties of yarn.
  • Mixtures of micro-titanium dioxide and standard titanium dioxide pigments provide a better response to hot light-fastness testing than either micro-pigments or standard pigments alone.

More Project Informations

Project title:  Manufacture of fibres and sheet textiles using micro-additive-doped polyethyleneterephthalate (PET)

Project number:  0339781/3

Project period:  1999 - 2001

Project region:  Germany ())

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