pvc coated tarpaulin for truck cover,waterproof truck cover pvc tarpaulin

The coating material of the coating material of the coating will impart the same performance to the use of the cover cloth. In order to ensure the use of the environment of the product requirements, to the coating agent and the corresponding additives to optimize the choice. There are many coating options available. Commonly used coating agents are mainly silicone coating agent, acrylic coating agent, polyurethane coating agent, PTFE coating agent and rubber. Silicone as a fabric coating agent not only has the toughness, high elasticity and plasticity of the general polymer compound, but also has high heat resistance and chemical stability. 

Silicone coating agent has a waterproof moisture permeability after film formation, allowing water vapor through, which is difficult to achieve the usual coating agent. In addition, it also has a smooth feel, low temperature supple and can improve the coating fabric tear strength and other characteristics. But it also has a more obvious shortcomings, that is, high prices and low strength. Due to these characteristics of silicone, it is generally not used alone as a coating agent, but it is mixed with other coating agent or as a post-treatment agent. 

In this way, although the silicone is less used, it improves the water repellency of the coated fabric and makes the surface smooth and remarkably improves the anti-sticking property of the coated fabric. Polyacrylate coating has the advantages of softness, resistance to dry cleaning, abrasion resistance, aging resistance, and it has good resistance to light and heat. As the acrylic polymer color is very shallow, in the light for a long time to maintain the transparency of the coating film, suitable for decorative materials for the coating. But because it contains more hydrophilic groups, and thus resistant to rain washed, not washable. 

Polyurethane does not require plasticizers, good mechanical strength. Heat resistance, impact resistance, wear resistance, but the price is high. Teflon is the only set of waterproof, oil, anti-fouling three functions in one resin. It is heat, resistant to oxidation, good weather resistance, no mildew, good elasticity, no sticky ride phenomenon, is an ideal coating agent, but the price is very high, it limits its use. However, in some environmental requirements are more demanding circumstances, polytetrafluoroethylene will play its difficult to replace the role. 

The rubber-based coating agent is less used because it has no hydrophilic groups on its macromolecules and is not moisture-permeable. In order to optimize the performance of the canopy cloth, the addition of the additive is necessary. Plasticizer: It is required to increase the plasticity, fluidity and softness of the coating agent, and to reduce the brittleness and rigidity of the coating agent. Modifier: Modification of the coating agent with a modifier to achieve its purpose of improving its flexibility, heat resistance, cold resistance, aging resistance, and appropriate to reduce the coating agent of the plasticizing temperature. 

Stabilizer: can slow down or prevent the decomposition of the polymer within a certain period of time. It requires good stability, light resistance, compatibility, water resistance, oil resistance, corrosion resistance and chemical stability during molding. Flame Retardant: Flame retardant used in canopy cloth products, including halogen compounds, phosphorus compounds and so on.

 According to the characteristics of various flame retardants, the use of complex flame retardant, it can play a heat decomposition or endothermic sublimation, isolated oxygen and combustible material diffusion role, but also play a role in plasticizing. Filler: The purpose of the filler is to reduce the cost of raw materials, to adjust the coating's high temperature resistance, thermal stability and so on without affecting the quality of the product.