waterproof tarpaulinThe reason why it can effectively resist rainwater invasion is that its internal layered structure cannot be broken. So, how many layers of waterproof tarpaulin are there? What are the functions of each layer?

Common layer structure

According to product types and application requirements, the layered structure of waterproof tarpaulins can be mainly divided into two categories:

The double-layer structure is the most common economical configuration, suitable for daily covering needs. For example, the PE color strip cloth tarpaulin uses high density polyethylene (HDPE) as the base material, forms a double-layer protective structure through the film covering process, and the surface layer is covered with an anti-aging UV coating, which effectively resists ultraviolet radiation and rain erosion. The rainproof cloth adopts double-sided waterproof technology, and the four corners are heat sealed with single folded edges, which has the characteristics of waterproofing, cold resistance, UV resistance, corrosion resistance, etc.

Three layer and multi-layer structures are the mainstream configurations for high-end waterproof tarpaulins. The structure of PVC tarpaulin can be divided into three layers: two pieces of PVC film with a base cloth sandwiched in between, and the base cloth layer can be made of materials such as polyester, cotton, nylon, fiberglass, etc. The four layer structure adds a black layer on top of the three layers, which has shading properties and is suitable for scenes that require complete light avoidance. And professional products such as "black polyester excellent fabric bonded with 3mm TPU film" also adopt a three-layer core structure: the surface layer is a tear resistant and wear-resistant layer, the middle layer is a functional layer, and the bottom layer is a protective layer, each performing its own duties.

Functional division of labor at each level

The hierarchical structure of waterproof tarpaulin usually consists of an outer layer, a middle layer, and an inner layer, each layer playing an important role in waterproof performance and durability. The outer layer is directly exposed to the external environment and its main function is to resist moisture and UV erosion; The middle layer usually uses high-strength polyester fiber as the base material, endowing the tarpaulin with excellent waterproof and anti fouling capabilities; The inner layer is responsible for further enhancing the overall sealing and durability.

It is worth noting that some high-performance waterproof tarpaulins also use the "three-layer composite base fabric" technology, which can increase the tensile strength by 300% compared to ordinary products. High end products undergo a 72 hour UV aging test and 1000 fold fatigue tests before leaving the factory to ensure long-term reliability.

Shopping Tips

When choosing waterproof tarpaulin, it is recommended to determine the number of layers according to the actual use: double layered temporary covering can meet the needs for daily use; For long-term outdoor use or scenarios with high waterproof requirements, a three-layer or four layer structure is more reliable. At the same time, attention should be paid to checking the thickness and uniformity of the coating - if the coating is too thin, it is easy to be scratched by sharp objects, and if it is too thick, its flexibility will decrease and it is prone to cracking. The recommended thickness is 0.15-0.2mm.