A sun block for a vehicle comprises an inner and an outer reflective layer and a thermal insulation layer between the inner and outer reflective layers, wherein the inner and outer reflective layers are respectively composed of a base layer and an aluminum film layer attached to the surface of the base layer. It is characterized in that at least one of the inner and outer reflective layers is a nonwoven layer or a paper layer. The car sun shade can also be composed of only a light reflecting layer and a heat insulating layer.
After adopting the above structure, the structure of the non-woven fabric can make the edge of the sun block not easy to wear, so as to prolong its service life, it can also reduce the friction between the glass and the glass, and avoid the occurrence of glass scratching; Using the low melting point of the non-woven layer or the paper layer, the sun block after retirement can be easily recovered, thus saving energy and avoiding environmental pollution. In addition, by means of the composite layer as a heat-insulating layer, the prepared sun block can be relatively straight, and can be tightly adhered to the windshield glass to obtain better shade and heat insulation effects.