Method for producing a metallised fabric, and resulting fabric
The invention relates to a method for producing a metallized fabric, including a step of washing a woven substrate, the method including, after the washing step, the following steps: calendering the substrate by applying a compression force to the substrate, and vacuum-metallizing the substrate in a rarefied atmosphere by depositing metal particles so as to form a layer of metal on the substrate.
1. A method for producing a metallized fabric, the method comprising:
washing a woven substrate comprising yarns having a weight of up to 70 decitex in the warp direction and in the filling direction, wherein the washing desizes the woven substrate; then
calendering the substrate by applying a compressive force to the substrate; and then
forming the woven substrate and a film into a continuous strip having a plurality of first sections placed in an end to end arrangement with a plurality of second sections, each first section formed from the woven substrate and placed between two of the second sections, and each second section formed of a film;
depositing, by vacuum metallization within a vacuum chamber, a layer of metal on each first section of the continuous strip by passing the continuous strip through the vacuum chamber,
wherein each first section of the continuous strip passes through the vacuum chamber at a first travel rate, and each second section of the continuous strip passes through the vacuum chamber at a second travel rate, the second travel speed being less than the first travel rate.
2. The method of claim 1 , wherein the woven substrate comprises one of synthetic fibers or microfibers.
3. The method of claim 1 , wherein the woven substrate comprises at least 42 warp yarns and 40 filling yarns per centimeter.
4. The method of claim 1 , wherein calendering the woven substrate comprises one or more of 1) at least one pass for each side of the woven substrate and 2) application of a compressive force at a temperature of about 195° C.
5. The method of claim 1 , wherein depositing the layer of metal on each first section of the continuous strip includes performing metal vapor deposition.
6. The method of claim 1 , wherein the formed metal layer is aluminum.
7. The method of claim 1 , wherein depositing the layer of metal on each first section of the continuous strip includes maintaining the vacuum chamber at a maximum pressure of 2.3×10 −3 bar.
8. The method of claim 1 , wherein the woven substrate comprises a textured microfiber, and depositing the layer of metal on each first section of the continuous strip includes maintaining the vacuum chamber at a maximum pressure of 4×10 −2 bar.
9. The method of claim 1 , wherein washing the woven substrate comprises a first washing pass and a second washing pass, at least one of the first washing pass and the second washing pass using caustic soda.