WHAT IS SVR CV50 NATURAL RUBBER?

DEFINITION

SVR CV50 (or TSR CV50) natural rubber is a premium product line of natural rubber with stable viscosity from 45 to 55.

SVR CV50 is derived from high-quality field latex, undergoing a production process to ensure a stabilized viscosity within a narrow range. This results in a rubber that is characteristically softer than conventional grades, providing distinct advantages in various industrial applications. With a controlled Mooney viscosity of 50 ± 5, SVR CV50 ensures uniform processing, excellent elasticity, and reliable mechanical strength.

SVR CV50 is preferred by manufacturers due to:

Stable viscosity
Flexibility, adhesion has confirmed this rubber thrive on the domestic market as well as the world.
High purity & consistency: better end-product quality.

Rubber varieties and planting years have a great impact on product quality, especially on viscosity index. In the natural rubber producing countries, during the manufacturing process, manufacturers are always equipped with the main measuring and testing equipments such as plasticity meters, viscometer.

Inside a bale of SVR CV50 natural rubber, the control of the production process with measuring equipment for timely calibration is important to give producers the means to achieve their production goals by testing.

APPLICATIONS

This premium rubber grade is widely used in tire manufacturing, adhesives, conveyor belts, and molded goods, where stable performance is critical. At APT Rubber, we supply SVR CV50 with strict quality control and full EUDR compliance, ensuring your business meets both technical and sustainability standards.

Because SVR CV50 (constant viscosity) rubber is characterized by constant viscosity and plasticity, it is preferred by manufacturers. mix of substances in the mixture well, high adhesion will create a good product and uniform.

This type of rubber is widely used in automotive and machinery components, industrial rolls and conveyor belts covers, wiper blades, masking takes, extruded products and chemical resistant linings…

Located in Binh Phuoc Province and Kontum Province, Vietnam

SVR3L – 20,000/y

SVR10 – 20,000/y

All products meet TCVN 3769:2016 standard

Advanced wastewater treatment technology

QUALITY SPECIFICATIONS ACCORDING TO TCVN 3769:2016

Quality specifications according to TCVN3769:2016 standard is described as below:

Dirt content (max% wt), retained on 45 micron sieve: 0,02
Ash content (max % wt): 0,40
Nitrogen content (max % wt): 0,60
Volatile matter (max % wt): 0,60
Plasticity retention index (PRI) (min): 60
Mooney Viscosity ML ( 1’ + 4’ ) 100°C: 50±5

PRODUCTION PROCESS OF APT RUBBER

Depending on the specific requirements of each customer, finished products SVR CV50 will be blended to meet customer requirements.

Step 1: Latex Collection

SVR CV50 is made from field latex tapped from Hevea brasiliensis.
The latex is preserved with ammonia to prevent premature coagulation.

Step 2: Coagulation

The latex is coagulated using formic acid or acetic acid.
Produces clean coagulum with uniform quality.
Step 3: Mastication & Size Reduction
The coagulum is passed through crepers and shredders, reducing it into thin sheets or crumbs.
Continuous washing removes impurities like dirt, bark, and proteins.

Step 4: Drying

Rubber sheets/crumbs are dried in hot-air dryers at controlled temperatures.
Ensures low moisture content (≤ 0.8%) and stable chemical composition.

Step 5: Constant Viscosity Adjustment

A key step unique to SVR CV grades.
Controlled doses of hydroxylamine or stabilizers are added to regulate the polymer chain.
This guarantees Mooney viscosity remains at 50 ± 5, even during processing at customer factories.

Step 6: Quality Control & Testing

Testing ensures compliance with Vietnamese Standard TCVN 3769 and customer requirements.

Step 7: Baling & Packaging

Dried rubber is pressed into 33.33 kg or 35 kg bales.
Wrapped in PE film and stacked on 1.2 MT wooden/steel pallets.
Bales are stamped with grade, batch, and production date for traceability.

Step 8: Storage & Shipment

Stored in clean, ventilated warehouses to maintain stability.
Exported globally under FOB, CIF, or DAP terms, with EUDR-compliant certification and full COA (Certificate of Analysis).

Our SVR CV50 rubber processing production line is supplied and maintained periodically by Quang Trung Mechanical Co., Ltd., a reputable company in the mechanical industry, manufacturing production lines and water treatment systems. waste in Vietnam rubber industry.

More information about Quang Trung Mechanical Co., Ltd: Click here

why should you buy svr cv50 from apt rubber?

The answers are pretty concrete:

Stable mooney viscosity: Minimum 6 months of mooney viscosity stability guaranteed! We understand mooney stability period is your main concern but not all manufacturers can commit on such solid claim.
Strong commitment on quality: but with reasonable price because we are manufacturer
25+ years of expertise: established since 1998, we have more than 25 years of experiences in processing natural rubber.
Export markets: Our SVR CV50 range has been welcomed in global markets such as USA, India, Korea, Malaysia…
EUDR Compliance: EUDR-Compliant Natural Rubber SVR CV50 is now available at APT Rubber.

You can also find other high quality natural rubber at APT Rubber. Explore our other range of natural rubber as below: