Which one is more suitable for industrial apron, Hot melt, laminated or knife coated PVC tarpaulin-DERFLEX

Which one is more suitable for industrial apron, Hot-melt, laminated or knife coated PVC tarpaulin?

I . First of all, the material composition of these three processes all is the same.

All are made of PVC coated polyester fabrics; it is 3-ply composition: 2 layers of PVC coated onto 100% polyester fabrics.

Hot melt

II. Do you know the principles of these three production technologies for Hot-melt, laminated or knife coated PVC tarpaulin?

a.Hot melt PVC flex is a polyester fabric laminated with PVC film both sides. Before lamination, the fabrics is passed through the glue, to make the heavy-duty PVC tarpaulin better adhesion.

This method is used for thermoplastic polymers such as polyurethane, polyolefins and PVC, which are applied by feeding granules of the material into the nip between moving heated rollers. There are two general designs in use, the Zimmer machine, which has two melt rollers the Bema machine, which has three. They are smaller version of calenders but differ in that they need a fabric (or paper or a film) as a substrate on which to deposit the film as it is produced. This method can apply resin (in the form of films) to fabric at a faster rate than that can be achieved by transfer coating or direct coating. This process is used to produce light weight coverings or tarpaulins.

Hot melt

b.Knife coated PVC tarpaulin material is polyester fabric coated with liquid PVC, real knife to make smooth surface, then heating until the PVC firmly stick into the fabric.

Coating is a process in which a polymeric layer is applied directly to one or both surfaces of the fabric. The polymer coating must adhere to the textile and a blade or similar aperture controls the thickness of the viscous polymer. The coated fabric is heated and the polymer is cured (that is, polymerized). Where a thick coating is required this may be built up by applying successive coating layers, layer on layer,Interlayer adhesion must therefore be high. Finally, a thin top layer may be applied for aesthetic or technical enhancement of the coating. Depending upon the end-use requirements, heavy-duty technical textile coatings may be applied at high weight, while other end-uses for high- technology apparel may require coating weights very low. The chemical formulation of the coating, the coating thickness and weight, the number of layers, the form of the technical textile and the nature of any pre-treatment (such as to stabilize the fabric dimensions prior to coating) are of great importance. Traditionally, coating has been applied to woven technical textiles, but increasingly warp-knitted, raschel, weft-knitted and nonwoven fabrics must be coated on the same line. The machinery and method of application of the coating formulation must be versatile, minimize tensions on the fabric that may lead to distortion or stretch, and eliminate problems in knitted fabrics such as curling selvedges. Scroll opening equipment, weft straightening, tension bars and selvedge uncurlers may thus be fitted. The lighter the weight of the technical textile the more prone will be the base fabric for coating to weft line distortion and selvedge curling.

knife coated PVC tarpaulin

c. laminated technology

A laminated (or combined) fabric consists of two or more layers, one of which is a textile fabric, bonded closely together by means of an added adhesive, or by the adhesive properties of one or more of the component layers. Conventional laminated technical textiles normally consist of one or more textile substrates that are combined using a pre- prepared polymer film or membrane by using adhesives or by using heat and pressure. Usually the layer in a laminated fabric consists of a polymeric substance; however, in some metalized fabrics the metal is not deposited by chemical deposition but is laminated using an adhesive or by use of an electric arc.

laminated

III. Comparation between knife coating, hot melt and laminated

ITEMS	Knife coated PVC	Hot met PVC	laminated
Breaking strength	√	○	○
Adhesion	√	○	○
Outdoor Durance	√	○	○
Water resistance	○	√	√
Air tightness	○	√	○
Main applications	Outdoor covers, tents, container bag, ventilation tube, etc…	Flexible water tank, inflatable castles, etc…	can be used to shield firewood, barbecue stoves, bicycles, recreational vehicles, and other outdoor products,etc...

Ⅳ.Application:

Polyethylene is a woven plastic-based material used to make poly tarps that can cover a variety of items. They are flexible enough to use in applications ranging from road transport covers to dome shelters and roof sheets. The poly tarp is very common because it is so versatile.

1. Truck cover, Top roof and side curtain.

2. Our door event tent(blockout)

3. Rain and sunshine shelter, playground.

4. Army tent, carriage tent and house building.

5. Construction structure.

V.Features:

1. Hot-melt Coating technology(Semi-coating).

2. Good peeling strength for welding.

3. Outstanding tearing strength.

4. Flame retardant character. (optional)

5. Anti ultraviolet treatment(UV). (optional)

6. Acrylic treatment (optional).

VI. About Derflex

DERFLEX is professional PVC tarpaulin manufacturer in China, with experience over 20 years, DER focus on manufacturing and exploring PVC coated fabrics.

PVC tarpaulin is made up of high tensile polyester, high quality resin powder, plasticizer, stabilizer, proper amount of calcium powder, and tiny quantity of chemicals.

Derflex is one of the leading Waterproof PVC Tarpaulin manufacturers in China with a history of 20 years. For more information please contact me:

Email: serena@derflex.com

Tele: +86 130 1285 4064 (WhatsApp and WeChat)

Facebook ID: https://www.facebook.com/serenazhu0809/