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2.4.3.2 Patents published<br />
The Secretary of State of Defence in Britain claims the production of a thermally insulating textile<br />
adapted to provide a variable degree of thermal insulation dependent on ambient temperature. The<br />
textile construction is composed of a laminate of two fabric layers having an interposed bulking layer<br />
onto which shape memory polymers in a repeated pattern are arranged. Thus, the bulk layer can vary<br />
the air gap between the two fabric layers depending upon a predetermined temperature (US 6312784<br />
B2).<br />
In US patent 6989471 from 2006 The Procter & Gamble company claims the invention of a hygienic<br />
absorbent article such as diapers; adult incontinence articles or feminine protection articles. This<br />
article comprises two layers with an absorbent core and a phase change material in between. The<br />
PCM is capable of releasing or absorbing heat when needed and is activated by the wearer, caregiver<br />
or environmental conditions between the article and the wearer.<br />
Malden Mills published a patent (US 6723967) in 2004 in which they claim heating or warming textile<br />
articles with phase change components. The heating textile, for instance in form of a jacket, consists<br />
of a fabric with electrical resistance heating elements that generate heat upon application of electrical<br />
power, e.g. from a battery mounted to the fabric. The PCM is also included into the fabric and is<br />
formulated to change phase in the temperature range of use, to cyclically absorb and release latent<br />
heat. Is it maybe the Polartec fleece?<br />
In US patent 6759476 a flexible thermal control composite is claimed. The composite comprises a<br />
polymer and an endothermic agent. The endothermic agent is dispersed, distributed and suspended in<br />
the polymer. Then it is cured to form a Polymer Containing an Endothermic Agent (PCEA) 6 . Thereafter<br />
they were extruded and spun into PCEA fibres, which can then be processed into textile structures. In<br />
general, the PCEA composite finds versatile applications, including protective clothing, winter clothing,<br />
diving suits, but also furniture, walls, car interiors etc..<br />
2.4.4 Applications in the interior textile sector<br />
2.4.4.1 Research projects and products<br />
In Britain, scientists have developed an acrylic fibre by incorporating microcapsules containing phase<br />
change materials. These fibres have been used for producing lightweight all-season blankets.<br />
6 PCEAs are capable of thermal control through their ability to absorb and store heat or to absorb and release it<br />
106