Radiation selective absorbing coating and process for obtaining the same at room temperature

Abstract

The present invention relates to materials and its thermal applications in different uses. More specifically, it relates to the use of a selective absorbing coating which is obtained at room temperature and is deposited on metal, which is additionally used for capturing solar energy or artificial light and converting it into thermal energy. The novelty of the present invention is related to its production process and its use and industrial application in meshes, fabrics, threads, fibers or metallic wires used in the textile industry for the manufacture of jackets, trousers, scarves, shirts, hats, gloves, mittens and mitts, sleeping bags, tents, to provide properties to absorb sunlight or artificial radiation and convert it into heat for heating said fibers or a body.

Description

REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in-part of U.S. application Ser. No. 14 / 895,362 filed Dec. 2, 2015, entitled, RADIATION SELECTIVE ABSORBING COATING AND PROCESS FOR OBTAINING THE SAME AT ROOM TEMPERATURE, pending, the content of which is incorporated herein by reference, which is a US national stage entry of PCT / MX2014 / 000173 filed Nov. 4, 2014, under the International Convention, which claims priority over Mexican patent application No. MX / a / 001213 filed Jan. 29, 2014.FIELD OF THE INVENTION[0002]The instant invention relates to materials and their thermal applications in different purposes. More specifically, it relates to the employment of a selective absorbing coating obtained at room temperature and deposited on metal, used for harnessing solar energy and converting it into thermal energy. Said coating improves the efficiency in the collection of thermal energy, optimizing visible and near infrared light harnessing and minimizing heat emi...

AI Technical Summary

Benefits of technology

The invention is about a process for getting a special coating that can absorb sun and / or man-made light and convert it into heat. This coating can be applied to different metallic surfaces, like smooth or rough surfaces, and can be used in various products like clothing, footwear, and accessories. The technical effect is to provide a durable and effective way to absorb and convert solar and artificial radiation into heat for better comfort and performance.

Problems solved by technology

Consequently, a selective coating will absorb and retain a substantial amount of solar radiation, while a non-selective surface, such as an ordinary black body, will lose a high percentage of the energy absorbed by re-radiation.

However, black surfaces give off much of this energy in the form of thermal radiation and wasting 45% of the absorbed energy.

The main advantage is an absorbance greater than 95% and an emittance lower than 0.20 in the range from 400° C. to 550° C. However, their compositions and methods for obtaining thereof are very complex and thus would not be economically sound in industries such as: food, textile, among others, because of their high production costs and thus the high price of the final product would be high for such markets.

The document U.S. Pat. No. 8,187,984 B2, Temperature sensitive intelligent textiles, relates to a textile fabric that includes a smooth surface with one or more regions (layers) of material having a variable behavior of thermal expansion or contraction, adjusting the insulation performance of the textile fabric in response to ambient conditions, yet the patent does not teach the use of radiation-absorbing coatings.

The electronic conductive fiber manufactured by such method has very high conductivity, thereby being used for the intelligent electronic fiber (e-textile and e-fiber); but its application is limited to the transmission of electricity.

At the same time, these patents propose processes that cannot be done at room temperature, which involves high costs processes.

Images