Cesium Tungstate Applied for Building Glass Thermal Insulating Coating

Cesium tungstate, which is known as a near infrared shielding material with the formula of CsxWO3, is often applied for producing building glass thermal insulating coating. Also, CsxWO3 can be used to prepare heat-retaining knit goods as it has near-infrared radiation absorbing properties. Well, how to prepare  Cs0.33WO3 heat-retaining fiber with good weathering resistance, good heat radiation absorption efficiency and excellent transparency?

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It is reported in a literature that, firstly, mix Cs0.33WO3 fine particles, toluene, and a dispersant for fine particle dispersion together to prepare a dispersion liquid. Then, remove toluene to prepare a Cs0.33WO3 disperse powder. And then this disperse powder is added to and intimately mixed with a polyethylene terephthalate resin pellet, and the mixture is extruded to prepare a strand which is then pelleted to prepare a master batch containing Cs0.33WO3 fine particles. This master batch is mixed with an inorganic fine particle-free master batch, and the mixture is melt spun, followed by stretching to prepare a polyester multifilament yarn. The polyester multifilament yarn is cut to prepare a polyester staple and thus to prepare a spun yarn. This spun yarn is used to prepare heat-retaining knit goods.

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