PVC tarpaulin is a three-ply fabric consisting of a piece of scrim laminated bet

Posted by romen on December 9th, 2020

Scrim is loosely woven material which can be made out of cotton, fiberglass, nylon, polyester, or a combination.  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 ultra violet protected. PVC tarpaulin has a weight which is measured in ounces per square yard.  For example: one square yard of a 13 oz. material weighs 13 ounces. As the material is put through the laminator, it is also embossed.  An 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 2” core.  The polyvinyl chloride (PVC) films were complemented by polyurethane films and coatings, silicone coatings, acrylic coatings, and blended rubber coatings. All of these films and coatings are reinforced with nylon and polyester fabrics which are non-wovens, wovens, and knits.  There are many other films, fabrics, and foil that can be coated and laminated for a variety of special applications.  The width of PVC tarpaulin is from 1.02 m up to 5.10m . Color can be customized according to customers’ requirement. 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:http://www.duletai.com/

Gernarlly speaking, pvc tarpaulin can be split into 4 types according to the technology and machine used:

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.

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.

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.

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.