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What is waterproof PVC tarpaulin made of?

Release time:

2021-10-09 14:30

PVC tarpaulin waterproof is mainly composed of two main components: polyester base fabric and polyvinyl chloride coating.


Base fabric material: The function of the base fabric is mainly to provide a high-strength structure and flexibility for waterproof PVC tarpaulin and is the basis for the production of high-strength PVC waterproof cover tarpaulin. The most commonly used base fabric materials in the production of tarpaulin PVC waterproof are polyester fabric and nylon fabrics. These fabric materials have high tensile strength, tear resistance, and flexibility. However, polyester based fabric is often the first choice. To meet the needs of various industry applications, polyester fiber base fabrics are available in many specifications: 200D PVC tarpaulin, 500D PVC tarpaulin waterproof, 550D PVC coated tarpaulin, 600D PVC tarpaulin, 1000D PVC tarpaulin fabric, 2000D PVC tarpaulin, etc. The higher the specification, the better the physical properties of the waterproof heavy duty UV resistant PVC tarpaulin fabric.


Polyvinyl chloride coating: The base material is coated with polyvinyl chloride (PVC) resin to give the base fabric waterproofing and additional protective properties (anti-UV, anti-mildew, waterproof, fireproof, antistatic, etc.). PVC is a synthetic thermoplastic polymer known for its excellent chemical resistance, durability, and versatility. The PVC coating is applied to both sides or one side of the base fabric through a specialized manufacturing process to ensure uniform coverage to make waterproof PVC coated tarpaulin fabric. There are currently two categories of tarpaulin waterproof PVC: waterproof knife coated PVC tarpaulins and PVC laminated tarpaulins. They represent two different manufacturing processes.


Polyvinyl chloride China waterproof PVC tarpaulins are versatile materials used in various outdoor applications due to their durability, water resistance, and resistance to harsh weather conditions. Let’s look at the manufacturing process, characteristics, and uses of lacquered PVC waterproofing tarpaulin.


First, we have to prepare specific base fabric specifications and PVC resin with special properties, such as customized 500gsm waterproof PVC tarpaulin.


The manufacturing process of PVC laminated tarpaulin:
The principle of PVC laminated tarpaulin is to laminate 2-8 rolls of PVC film and base fabric at high temperatures. So first we have to use a calender to make a thin and uniform PVC film sheet from PVC polymer. The calendar rolls and cools the PVC film through a multi-roller system to form a glossy, matte, or embossed effect. The specific production process and video can be read on the PVC film page.


The second step is to use a hot melt calendar to produce the 500gsm waterproof PVC tarpaulin we need using 2-8 rolls of PVC film and base fabric. PVC tarpaulin rolls can be produced with a maximum width of 5.1 meters, and the width size can be customized according to customer needs. Its main principle is to fuse PVC film and base fabric under high temperature and high pressure. Then it enters the cooling area through the roller system to form the PVC laminated tarpaulin material, which is then cut, rolled, and packaged. Our sales are mainly delivered in PVC tarpaulin rolls. Each product is not in stock and is produced according to customer orders.


The manufacturing process of PVC knife coated tarpaulin:
The main principle is to apply PVC resin on the base fabric. First, we feed the prepared base fabric into a coating machine equipped with a precision-controlled blade system. During the blade coating process, the high-performance PVC resin is applied to one side of the substrate fabric as it passes under the blade. The distance between the blade and the fabric surface determines the thickness of the PVC coating. As the base fabric moves under the blade, the PVC resin is evenly distributed over the surface of the fabric, creating a uniform coating.


After applying the PVC coating, the PVC knife coated tarpaulin fabric passes through a heating chamber or oven. Bonds PVC resin to the substrate fabric and creates a strong and durable coating. The combination of high temperature and pressure helps to fuse the PVC coating to the fabric, ensuring the adhesion of the PVC knife coated tarpaulin fabric.


Once the curing process is complete, the coated fabric is cooled to stabilize the PVC coating and prevent deformation. The cooled material undergoes quality inspection to verify whether uniformity and adhesion meet standards. Finally, the finished PVC knife coated tarpaulin rolls are packaged. Waterproof tear proof pvc tarpaulins are labeled and shipped to customers or dealers for use in a variety of applications such as truck covers, tents, banners, and industrial curtains. If you want to wholesale 500gsm waterproof PVC tarpaulin you can directly contact waterproof heavy duty PVC tarpaulin factory.