What To Pay Attention To When Buying Custom PVC Tarpaulin

Did you know that PVC Tarpaulin is not just a solid piece of plastic? In fact, it is a composite that contains a skeleton of high-strength woven fabric. Despite its unique features, PVC tarpaulin is heat and RF-weldable, unlike tarps or fabrics. These massive advantages of PVC tarpaulin material make it a highly versatile material. Choosing the right PVC tarps requires more effort than just picking the color. It requires an analysis of whether the product will last long and perform its intended function.

Whether you need PVC tarpaulins fabric for aquaculture tanks, a flexible roll-up truck side curtain, or architectural membranes, the success of the product depends on three things:

• Strength of Base Fabric
• Resin Composition
• Specialized Coatings

This article will dive deep into all aspects of custom PVC tarpaulin. It will help you find the right manufacturer that provides the material for your required solution.

Understanding Material Composition

▶Base Fabric: The Core Strength

• Fiber Denier (D): It is the number that represents the individual polyester fiber thickness. For heavy-duty use, typical choices include 1000D, 1300D, or 1500D.
• Weaving Density: It is a specification that provides information on how many threads are packed into an inch. In the case of Panama weave, there can be 20x20 or 30x30 threads/inch. Packing the threads together directly impacts their tear and tensile strength.

Pro Tip: Industry professionals advise their clients to pick a thinner thread that is tightly packed. It means a low D value + high density. For example, 1000D 20x20 in comparison to 2000D 12x12 is 15% stronger and 10 to 15% cheaper.

▶Strength and Construction Methods

• Tensile Strength: The strength of PVC tarp is analyzed by calculating the amount of pulling force it can handle without breaking. A heavy-duty 800 gsm can handle a longitudinal tensile force of 2500N/5cm. It is the must-have tensile strength for flexible truck covers.
• Dimensional Stability: Warp-knit fabrics have extra threads that tie them together. It improves its tear resistance but reduces its stability. Consider this factor when selecting PVC tarpaulin.
• Woven vs. Warp Knitted: For a smooth look and cleaner finish, woven structures are highly valued. Warp-knitted fabric is faster to make and costs less. Some versions still offer similar strength for the same denier.

▶Calculating Weight

If you want to check the weight of the base fabric yourself, you can use the following formula.

Basis weight (gsm) calculation formula:

Basis weight (gsm) =

(warp density + weft density) × 39.37 × denier (D)

9000 ​

Remark: 

1. Warp density, weft density = ends/inch

2. 39.37 = conversion of yarn length per square meter (meters)

3. D (Denier) = yarn denier

4. 9000 = Denier definition benchmark (weight in grams of 9000 meters)

PVC Coating and Resin Quality

✔Purity of the Mixture

Always ask for 100% virgin PVC resin used in the manufacturing of custom PVC tarp. If they use recycled content, it may lead to uneven color and the material's ductility. It would also cause the material to deteriorate much faster. Some low-end manufacturers add crushed calcium carbonate powder to cut costs. Doing this will cause weak welding and shorten the materials' service life.

✔Sticking Together and Staying Dry

High-end tarps use specialized chemical additives that make the plastic layers tightly packed at the molecular level with the polyester base. It prevents delamination. The whole surface should be free from any pinholes. It creates a high-stress region that can cause the material to break easily.

✔Standing Up to Damage and Staying Safe

To ensure that the material lasts longer, manufacturers may add anti-fungal elements and anti-aging agents. These help fabric survive harsh chemical and acidic environments. As for modern standards, the material should not contain any heavy metals. Specifically, tin-organic compounds and nonylphenol. It ensures the product is REACH  and RoHS compliant.

✔A Quick Trick for Checking the Material

To differentiate between premium PVC and an alternative PE. Drop the material into water and see if it sinks to the bottom. If it does its PVC and if it doesn't, then it's made from PE material.

Technical Specifications to Scrutinize

◆GSM and Thickness Balance

GSM is grams per square meter. It is the unit for measuring the fabric's weight. Buyers use it as a primary indicator of material durability. Standard heavy-duty material is between 550 and 900 GSM. For extreme heavy-duty cases, 1200 GSM or even 2500 GSM are used. These might be for specialized flexible containers. The general precision expected in GSM is around +-10 GSM.

The thickness of the material can run from 0.3mm to 2.0mm. To put these into perspective, a 0.45mm thick cover with 560 GSM works well for 4-6 years. In comparison, 750GSM can perform its intended function for 10years despite being exposed to challenging environmental factors.

◆Softness and PHR Levels

The softness of the plastic is measured using PHR (parts per hundred resin). A higher number means more softening chemicals have been mixed in to make the cover much more flexible. Most custom covers range from 18 PHR, which is reasonably stiff, all the way up to 78 PHR, which can be very soft and flexible. Going above 70 PHR will increase the price drastically, as plasticizers are expensive.

The PHR rating impacts the material's ability to resist cold-cracking. Higher PHR values are bendable even in freezing weather down to -30 °C. On the contrary, if you need strict dimensional stability like furniture lamination or stationery folders, then you need low PHR values.

Advanced Performance Treatments

◇UV Resistance and Anti-Aging

High-quality cover mixes special UV stabilizers like HALS and absorbers into their material. It prevents the material from chalking, cracking and losing its tensile strength. UV radiation makes up only 4.6%  of the solar spectrum. The most harsh type is the UVB with the range 280-315nm. It is the main reason that chemical link polymer chains lose their material integrity. With protective treatments, a well-made PVC tarpaulin fabric can survive 10-20 years without significant degradation.

To enhance their durability further, they use PVDF (Polyvinylidene Fluoride) or Acrylic resin coatings. It creates a thin layer that make sit convenient to wash away contaminants.

◇Fire Retardancy and Safety Standards

The PVC is naturally good at resistant fir and spreading flame because of the chlorine content. However, some manufacturers add extra elements for a top-tier fire safety rating. For heavy-duty commercial applications, such as fire-retardant traps, the fire-retardant value of 40 or more is achieved by manufacturers in their products.

As per the law, you must check for safety approval before utilizing PVC tarpaulin material in buildings or large tents. These laws vary from region to region. Some examples are NFPA 701 (USA), DIN 4102-B1 (Germany), or BS 5852 (UK).

Customization and Aesthetic Options

●Choosing Pattern and Shine

Factories can press over 30 different embossing patterns onto the material. Make it look like leather grain, diamond grids or geometric textures as required by the client. They also offer glossy shine and matte finishes. Gloss is much easier to clean while matte offers reduced glare, giving it a professional appearance. Advanced manufacturers offer 3D textures with 0.5mm+ thick PVC tarpaulin.

●Smart Design Choices

Remember, using glossy finishes and rolling them up together with the glossy finishes facing each other creates a lot of friction. It may cause the layers to glue themselves together. If you are making pads for a hospital or gym, may attest or textured surface may be better as they have non-slip properties.

Evaluating Manufacturing Quality and QC

Advanced manufacturers use computerized systems for real-time tension control and monitoring. It guarantees that the thickness and weight of the PVC tarps are the same across a complete roll. Always ask for paperwork like the Raw Material Traceability Certificate. It proves that the plastic is made with virgin resin and has chemical additives as promised for the premium price.

Always ensure that the PVC tarpaulin manufacturer has a facility that is qualified under the ISO 9001 standard. It assures that their manufacturing process is professional and up to international standards. Then look for SGS certification to prove that they have the right tensile and tear strength.

Conclusion

Finding the right PVC tarpaulin for your application can be challenging. However, if you divide the process into simple tiers, you can find the ideal solution for your project. Start by analyzing the specification. It will help judge most of the engineering products' quality and performance. Look for key indicators like GSM, D-Value, PHR, and advanced coatings like PVDF lacquering. These collectively guarantee that the product lasts long under extreme conditions.

To make the PVC tarpaulin selection process easy, consider partnering with an experience manufacturer like Linyang PVC. We offer the most variety and ensure compliance with international requirements for quality products. Our massive experience in the field can help clients figure out the right material for our project.

FAQs

1. What is the main difference between PE and PVC tarpaulins?

The primary differentiator of PE and PVC is their price tag. Although the products might seem similar aesthetically, PE has a much lower life expectancy in comparison to PVC tarpaulin. PE lasts 1 to 2 years, while PVC tarpaulins last up to 10 years.

2. Why does the PHR value matter when ordering a custom tarp?

PHR stands for parts per hundred resin. It is the key parameter that indicates how flexible the custom tarp will be. Consider a higher number for higher flexibility and a lower number for applications where you require stiffness.

3. Is Knife-Coated or Laminated PVC tarp material better for my project?

Both types have their respective applications. Projects that require flexibility and bending should opt for knife-coated. In case you need air-tightness for your project, go for the laminated PVC tarpaulin.