PVC Tarpaulin

PVC tarpaulin is a three-ply fabric consisting of a layer of scrim laminated or coated between two layers of polyvinyl (PVC) material. Scrim is woven or warp knitted material which can be made out of polyester yarn. The polyester is measured by the weights of the thread (denier) and the density of the weave (threads per inch) or count. The heavier the weight the higher the denier. A 9×9 scrim has 9 threads per inch by 9 threads per inch. The first number is the number of threads in the machine direction (or warp) and the second number is the number of threads in the cross direction (or fill). The vinyl is measured by its thickness (1 mil is 1/1000 of an inch). Vinyl is treated to have certain properties such as flame retardant, antimicrobial, antistatic, and UV protected. PVC tarpaulin has a weight which is measured in ounces per square yard or grams per square meter. Embossing is the surface texture. Duletai’s most common embossings are matte, taffeta, and polish. Our banner products usually have a matte finish for smoothness.  Our tent products often have a polish finish, and our hospital products, such as mattress ticking have a taffeta finish.  The material is rolled onto a cardboard core. Our standard core size is 3” inside diameter, but occasionally we will use a 6” core for larger roll length. The width of PVC tarpaulin is from 1.02 m up to 5.10m. Colors can be customized according to customers’ requirement. 

PVC Tarpaulin Production Technologies Comparism

We can produce laminated and coated PVC tarpaulin, for its good flexibility, excellent tensile strength and tear strength and develop all kinds of durable PVC tarpaulin materials for different applications:

Gernarlly speaking, there are several types of machines commonly used for the pvc tarpaulin manufacturing process according to the different material specification:

1. Calendering machine: This machine is used to make pvc film. It can stir the pvc raw material to the paste. Then use roller system to calender into different thickness pvc films. Calendared vinyl films are formed from an older process of taking a dough-like material consisting of PVC, pigments, plasticizer and stabilizer, mixing them in an extruder and then rolling it through polished heated rollers which stretches the material to the proper thickness. The film is then fused to a polyester backing. The process is completed when the material is given a gloss, matte or embossed finish.
   
2. Cold lamination machine: This machine is the first generation invented for this industry. It is still wildly used to laminate pvc films onto polyester base fabric. It’s short process, high speed and low running cost. The disadvantage is the drum temprature and pressure is limited so the product quality is for short life time material like flex banner and tarpaulin for low price market.
3. Hot laminateion machine: This is the PRO version of cold lamination machine, it is almost twice longer process. This machine can reach much higher temprature and pressure, it has much more complex embossing roller and surface treatment system to can make high quality, high gsm material that can be used for tents, covers, inflatables…etc and with it’s surface treatment it can add acrylic coating to make it self cleaning. Also this machine can add extra glue to the film or base fabric to make simi-coated pvc tarpaulin which is better adhensive performance to improve the technical data and life-span of the product.
4. Knife coating machine is not like lamination machine that need calendering machine supply pvc film in big rolls. It directly coat pvc resin on to the base fabric with a doctor blade. Then the material go through embossing roller to heatcase for drying. Knife coating machine is a kind of luxury option for vinyls, the coating quality have led to significant increases in lifespan over 10 years. And it can make heavy-duty material over 1500gsm for membrane structure or tents. PVC coated vinyl  has excellent tensile strength. This fabric is useful for both permanent and temporary projects. The PVC coated vinyl can be used for things like luggage, bags, cases, and protective coverings. PVC coated vinyl roll widths from 1.0mts -5.1mts, weight From 240gsm -2700gsm, thickness from 0.19mm -2.0mm. 

PVC Tarpaulin Material Structures

Diagram	Structure	Feature	Application
	2-LAYERS 1. PVC Film 2. Base Fabric	Economical	Bags, Gymmat
	3-LAYERS 1. PVC Film 2. Base Fabric 3. PVC Film	Most widly used	Banner, Tarps
	4-LAYERS 1. PVC Film 2. Blockout Layer 3. Base Fabric 4. PVC Film	Blockout light	Banner, Tent

Technical Datasheet of Regular Types

We can use different combination of polyester yarns and forms of weaving. That will change its tearing strength, breaking strength…etc. And we can adjust thickness and structure of pvc film to control weight, by changing formulation to enable FR, anti-static, air tight, chemical resistant…etc. PVC film hardness can also cause different hand feeling. When producing we can use different technology (for example: cold lamination, hot lamination, knife coating) for different application of material. Different embossing roller can make the material surface glossy, matte or embossed pattern. This is how we customize industrail fabrics according to request. So as an OEM manufacturer, Duletai new material has a large selection of materials in different styles and specifications to chose from or 100% custom built according to customer.

Following is our pvc tarpaulin categories for different technology and applications, click image to view product list for each type: