Photocatalyst-carrying tent cloth canvas and production...

B - Operations – Transporting – 32 – B

Patent

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Details

B32B 27/08 (2006.01) B32B 27/22 (2006.01) D06M 11/46 (2006.01) D06N 3/06 (2006.01) D06N 3/18 (2006.01) E04H 15/54 (2006.01)

Patent

CA 2399737

A tent cloth canvas coated on the surface thereof with a photocatalyst, wherein (1) the adhesiveness between a photocatalyst and the tent cloth canvas is kept satisfactorily for an extended time, (2) an anti-fouling capability is kept for a long time, and (3) the photocatalyst carried on the tent cloth canvas does not promote a lowering with time of a tear strength. A tent cloth canvas coated on the surface thereof with a photocatalyst is used, wherein more than 50% in amount of a plasticizer contained in the canvas remains in comparison with that at an initial stage 1500 hours after the canvas is subjected to a sunshine carbon arc type accelerated weathering test as specified in JIS-K5400, or after 3-year outdoor exposure; and a tent clothe canvas having the above properties and structures further contains a plasticizer having a molecular weight of at least 400, and/or a plasticizer migration restricting layer is provided in the middle of the tent cloth and photocatalyst coating layer.

L'invention concerne un canevas de toile de tente dont la surface est revêtue d'un photocatalyseur, et caractérisé (1) en ce que l'adhérence entre le photocatalyseur et le canevas de toile est maintenue de façon satisfaisante pendant une période prolongée, (2) en ce que sa capacité anti-salissures est maintenue pendant une longue période, et (3) en ce que le photocatalyseur revêtant ce canevas ne favorise pas, avec le temps, une moindre résistance à la déchirure. Ce canevas de toile de tente, dont la surface est revêtue d'un photocatalyseur, possède la propriété de conserver une quantité -supérieure à 50 %- d'un plastifiant contenu dans le canevas, par rapport à celle du stade initial, après avoir été soumis, pendant 1500 heures, à un test de vieillissement accéléré du type à arc de carbone à rayons de type solaire, ou après avoir été exposé à l'extérieur pendant 3 ans. Un tel canevas possédant les propriétés et la structure ci-dessus contient en outre un plastifiant dont la masse moléculaire est d'au moins 400, et/ou une couche empêchant la migration de ce plastifiant, déposée entre la toile de tente et la couche de revêtement à base du photocatalyseur.

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