It's time to go out with a sun umbrella in summer again, so many people are confused. How to choose a sun umbrella? Now let's see if the black glue of the sun umbrella is better inside or outside
It's good to be inside. It's better to be light outside. So most of the light is reflected, and the rest is absorbed by the black of the inner layer. If black is on the outside or on both sides, it will be very hot, because most of the light is absorbed & hellip;
Let's take a look at the specific analysis
First of all, when the black glue is outside, black absorbs all the color light, so it appears black. (Baise reflects all the color light, and all the color light is mixed with white). So if the black glue is outside, all the color light of the sun is absorbed, so it appears particularly hot.
Then there is the case of black glue. The outer layer is of other colors (the lighter the color is, the less the color light is absorbed, and the cooler it is). Then the outer layer reflects most of the sunlight. The inner layer of black glue absorbs part of the sunlight. (it seems that the black glue also absorbs ultraviolet rays, which I don't understand. I hope to teach you. If it absorbs ultraviolet rays, it's the same inside and outside). No It will be so hot and have the same sun protection effect. The other thing is that if the inner layer is black, other color light reflected from the ground will be absorbed into the umbrella and will not shine on the face, which is better.
Use angle
Because the black rubber layer is relatively fragile, if it is placed on the outer layer, the general scratch and rain will have a corrosive effect on the sunscreen coating. After a long time, the sunscreen coating will weaken, thus affecting the sunscreen effect. So in terms of black glue, it's better to choose the products in it.
What's the black glue of the sun umbrella? The black glue umbrella is a new type of anti UV fabric. Its main feature is that it's reinforced anti UV and has no peculiar smell. It's not easy to age. The silver rubber umbrella depends on the UV protection of the coating, and the quality of the coating directly determines the degree of UV protection. Most of the silver rubber umbrellas sold on the market are vainly UV resistant and easy to age and fall off. Therefore, at present, the more black rubber umbrellas are used, the more silver rubber umbrellas are used.
Is the sunscreen effect of black rubber umbrella better than that of ordinary sunshade?
Experts used a professional ultraviolet light intensity meter to carry out a group of comparative experiments.
1. Experimental supplies: black rubber coated umbrella, silver rubber coated umbrella, ordinary umbrella and ultraviolet light intensity meter.
2、 Under the shelter of the black umbrella, the UV intensity value is 26uW/cm2.
3. Under the shelter of silver gel umbrella, the intensity of ultraviolet light is 86uw / cm2.
4. Under the shelter of the common umbrella, the instrument displays 498uw / cm2.