What are the common knowledge for purchasing sun umbrellas in advertisements?

Advertising sun umbrella is a type of umbrella mainly used to block direct sunlight. It has two umbrella ribs and a sunshade fixed to this handle, both of which are made of a special layer of material. A solar umbrella can block about 70% of ultraviolet radiation, but cannot isolate reflected ultraviolet radiation. In addition, there will be a layer of UV resistant coating on the umbrella surface. If it is not for an umbrella with an anti ultraviolet coating, a general sun umbrella can also be used. Black umbrellas have better defense effects, followed by pink, with goose yellow being the least effective, and red rarely has UV protection.

The size and function of advertising sun umbrellas vary, and there are also some differences in selection. Larger ones can provide shade and rain protection, while smaller ones can serve as decorations and beautification. The radiation protection of sunshade mainly depends on the fabric used. Generally speaking, umbrella materials with good shading effects should be transparent or semi transparent. As long as there is radiation resistant fabric, such as when the wind is strong, do not hold a parasol tightly. Many small sun umbrellas are made of aluminum alloy.

Selection of advertising sun umbrellas:

1. A large sun umbrella generally refers to a non handheld sun umbrella, mainly used on the ground. When using outdoors, factors such as sunlight and wind direction need to be considered. A high-quality large sun umbrella should have functions of preventing ultraviolet rays and rainwater, as well as high wind resistance. Additionally, attention should be paid to the selection of umbrella bone materials. When selecting an umbrella surface, it is best to choose a silver plated cloth, as the silver plated layer can reflect most of the ultraviolet rays and has rainproof function. If metal or plastic materials are used for the umbrella surface, it will affect its appearance. It is recommended to use transparent materials for production. Choose a dense twill and plain umbrella surface.

2. Consider the strength and stability of the umbrella bone. Advertising sun umbrellas mainly improve wind resistance through the umbrella seat, and determine the umbrella pillar and umbrella bone. Therefore, it is important to ensure that each umbrella rope is tightly connected during the production process. Umbrellas are usually made of iron and cement, marble, and water. The umbrella handle is connected to the umbrella bone with screws. Umbrellas are usually made of five materials - wood, iron, aluminum alloy, and stainless steel, a new type of composite material. Among them, wood is currently a commonly used material. Due to its complex process, high cost, and susceptibility to damage, wood is hardly available for sale. Therefore, currently, China's production of umbrellas mainly relies on imports, which consumes a large amount of foreign exchange every year.

3. Choose a UV resistant umbrella, mainly based on the fabric of the umbrella surface. According to the different materials of the umbrella surface, it can be divided into two types: thin eaves and thick eaves. Research shows that thick canopies have better UV resistance than thin canopies. In addition, umbrellas made of different materials also have a certain degree of blocking effect on ultraviolet radiation, such as thick canvas, which has a good blocking effect on strong ultraviolet and infrared light. Usually, cotton, silk, nylon, viscose, and other fabrics have poor UV resistance, while polyester has a better effect.

In fact, different materials of radiation resistant fabrics have their own unique functions and characteristics. For example, a fabric that is very thin but very tight has higher protective properties than ordinary fabrics; Another type of fabric, although also having a certain thickness, generates strong ultraviolet radiation when exposed to sunlight. In addition, the darker the color of UV protection, the better. Currently, there are many UV resistant fabrics on the market. Satin fabric is better, followed by twill and less plain. Labeling clothing with UV resistant functional labels is a very important task, as it relates to whether consumers have good radiation resistance to their clothing.