SVR 3L Natural Rubber From Vietnam – Trusted Choice For Global Manufacturers

SVR 3L natural rubber (SVR 3L rubber) is engineered for buyers who require ultra-clean material (dirt ≤0.03%, low ash) and stable Mooney viscosity for predictable mixing. With high PRI and consistent processing behavior, it supports demanding applications in tire manufacturing, hoses, belts, and molded industrial components. As a Vietnam-based exporter, Ngoc Chau Natural Rubber provides export-ready bale loads, stable long-term supply, and batch-specific COA for OEMs and technical rubber processors worldwide.

What is the definition of natural rubber SVR 3L?

SVR 3L (Standard Vietnamese Rubber 3L) is a premium grade of natural rubber defined within Vietnam’s national standard classification system. The product is processed from natural rubber latex through impurity filtration, rolling, pressing, drying, and compression into bales. 

The designation “3L” represents a high-quality grade: Light-colored, Low dirt, Low ash, Low nitrogen, and Low volatile matter, meeting international standards and suitable for technical applications that require high purity and excellent mechanical strength.

Outstanding features of SVR 3L product

Discover the outstanding features that make SVR 3L a preferred choice in the global rubber industry:

• High-grade purity: Reduced dirt content results in a clear, bright, and even tone.
• Quality Stability: Stable Mooney viscosity, ensuring excellent processability in industrial manufacturing.
• Good Plasticity and Elasticity: Meets the strict requirements of premium tire production, conveyor belts, hoses, anti-vibration pads, and heavy-duty rubber products.
• International Standard Compliance: Manufactured under ISO/TCVN quality control systems, meeting the demands of major factories worldwide.
• Wide Applications: Primarily used in high-quality tire manufacturing, but also applied in technical rubber products, gaskets, cables, and conveyor belts.

Overview assessment of SVR 3L technical specifications

SVR 3L stands out as a premium natural rubber grade with outstanding properties that ensure consistent performance and reliability for industrial applications worldwide:

Property	Result	Test Method (TCVN/ISO)
Dirt (retained on 45μm aperture), %m/m	0.005	TCVN 6089:2016 / ISO 249:2016
Ash, %m/m	0.17	TCVN 6087:2010 / ISO 247-1:2018
Volatile Matter, %m/m	0.16	TCVN 6088-1:2014 / ISO 248-1:2018
Nitrogen, %m/m	0.30	TCVN 6091:2016 / ISO 1656:2019
Initial Wallace Plasticity (Po)	45.7	TCVN 8493:2010 / ISO 2007:2018
PRI (P₀ / P₀) × 100%	85	TCVN 8494:2020 / ISO 2930:2017
Lovibond Colour	4.5	TCVN 6093:2013 / ISO 4660:2011
Mooney Viscosity ML (1+4) @100°C	77.3	TCVN 6090-1:2015 / ISO 289-1:2015

✅ All tests are conducted according to Vietnamese Standard TCVN 3769:2016, based on ISO 2000:2014.

How SVR 3L rubber is produced

At Ngoc Chau, SVR 3L is produced through a controlled workflow: latex collection → filtration → acid coagulation → washing & granulation → smokehouse drying → grading & packing. This ensures batch-to-batch consistency and low impurity levels.

Latex collection & preservation

Fresh natural rubber latex is harvested from Hevea brasiliensis trees. Ammonia is added at the plantation to prevent premature coagulation during transportation.

Reception & preliminary treatment

The latex is first filtered at the plant to separate coarse particles such as bark, insects, and other debris. It is then diluted to the proper concentration for the coagulation stage.

Acid coagulation

Acetic acid or formic acid is added to coagulate the latex in coagulation tanks. This process forms a uniform rubber coagulum, separated from the serum.

Washing – rolling – granulation

The coagulum is repeatedly washed with clean water to remove impurities and residual serum. It is then rolled into thin sheets and granulated into small particles to increase surface area, allowing faster and more uniform drying.

Smoking & drying

The rubber is placed in smoking/drying chambers under controlled temperature and humidity. Purpose: to reduce moisture to standard levels, stabilize polymer structure, prevent mold and bacteria, and give the product its characteristic light color.

Classification & packing

After drying, the product is tested and classified according to standard rubber 3L technical standards (dirt, ash, nitrogen, PRI, Mooney, etc.). Qualified rubber is pressed into 33.33 kg bales, wrapped in clean PE film to ensure hygiene and quality.

Transport

Finished products are stored in cool, dry, well-ventilated warehouses, away from direct sunlight and high humidity. After quality inspection and shipment approval, Vietnam natural rubber SVR 3L is loaded onto pallets or directly into containers, with a capacity of 18–21 tons/20’DC containers.

Standardized packing process of SVR 3L natural rubber

Ngoc Chau Natural Rubber supplies SVR 3L with export-standard packaging compliant with ISO/TCVN specifications. All packing formats are designed to ensure safe container loading, easier handling at factories and maximum stability during sea transport.

Benefits of Ngoc Chau’s Packing Options

• 33.33 kg vs 35 kg bale options
  → Flexible for different mixing lines and batch formulations; 33.33 kg fits traditional loading patterns, while 35 kg maximizes payload for cost efficiency.

• Palletized loading
  → Faster loading/unloading, reduced bale deformation, safer storage, and lower labor intensity at receiving factories.

• Optimized weight per 20ft container
  → Ensures stable loading, minimal cargo shift, and maximum usable weight within ocean freight regulations.

• Export-ready documentation
  → COA per batch, pallet labels, bale numbering, fumigation certificates (when required).

Packaging Type	Quantity per Unit	Total Units	Total Weight (MTs)	Container Type
BALE	33.33 kgs/Bale	600 – 630 bales	20 – 21 MTs	20 DC
	35 kgs/Bale	600 – 630 bales	21 – 22.05 MTs	20 DC
PALLET	33.33 kgs/Bale; 36 Bales/1.2 MTs/Pallet	16 pallets	19.2 MTs	20 DC
	35 kgs/Bale; 36 Bales/1.26 MTs/Pallet	16 pallets	20.16 MTs	20 DC

Applications of rubber natural SVR 3L products

SVR 3L natural rubber is widely used across multiple industries due to its high purity, stable Mooney viscosity, strong mechanical properties and excellent processability. Below are the key application groups aligned with major buyer segments:

1. Tire & Automotive Industry

Applications:

• Passenger car, truck, motorcycle, bicycle, and aircraft tires

• Treads, carcasses, sidewalls

• Rubber bushings, engine mounts, vibration control parts

SVR 3L is preferred because:
Its low dirt (≤0.03%), high PRI, and consistent Mooney viscosity ensure predictable mixing, strong bonding, and long-term durability under heavy load and high temperature.

2. Industrial Rubber Goods

Applications:

• Conveyor belts

• Industrial hoses

• Gaskets, seals, O-rings

• Shock absorbers, vibration pads

• Molded technical parts

SVR 3L is preferred because:
Its high tensile strength, elasticity, and abrasion resistance help industrial components maintain stability and performance in harsh environments.

3. Electrical & Cable Industry

Applications:

• Insulation layers

• Protective sheaths for power cables

• Communication cable coatings

SVR 3L is preferred because:
It offers excellent dielectric strength, heat resistance, and moisture resistance, which are critical for safe and long-lasting electrical insulation.

4. Medical & Hygiene Products

Applications:

• Examination gloves

• Medical tubing

• Rubber stoppers

• Healthcare device components

SVR 3L is preferred because:
Its very high purity and low impurity levels meet stringent hygiene standards, ensuring biocompatibility and safety.

5. Consumer & Household Goods

Applications:

• Children’s toys

• Anti-slip mats

• Rubber flooring

• Household elastic products

SVR 3L is preferred because:
The material is flexible, durable, eco-friendly, and safe for items requiring skin contact.

Why choose SVR 3L from Ngoc Chau Natural Rubber?

Selecting the right supplier impacts cost, quality stability, and production continuity. Here is why international manufacturers consistently choose Ngoc Chau Rubber – Vietnam:

🔘 Proven Quality Standards

• High purity with dirt ≤0.03%, low ash, stable Mooney

• ISO 9001:2015 & TCVN 3769:2016 compliant production

• Bright color grade, low odor, high PRI for consistent compounding
  SVR 3L is preferred because: it ensures predictable mixing performance and reduced defect rates.

🔘 Scale & Supply Reliability

• 20,000+ MT annual capacity

• Bulk bale availability for long-term contracts

• Production stability even during peak tire industry seasons
  What it means for buyers: fewer stock interruptions & predictable lead times.

🔘 Global Export Footprint

• Exported to 15+ countries across Asia, EU, Middle East & Africa

• Experience with OEM, Tier-1 factories & trading networks
  Proof of trust: repeat annual contracts with global rubber processors.

🔘 Fully Documented QA/QC Control

• COA for every batch

• Loading photos, weight list & container sealing report

• MSDS, TDS, C/O, Form E, Form D, Phytosanitary Certificate as required
  Benefit to buyer: smooth customs clearance and zero documentation friction.

🔘 Advanced Processing System

• Modern centrifuge, milling & smoking lines

• Automated dirt & Mooney testing equipment

• Internal lab calibration & routine testing schedule
  Result: stable viscosity, uniform sheeting & reduced quality deviations.

🔘 Flexible Delivery & Packaging

• Packaging: bale, pallet, fumigated wood, kraft wrap, steel banding

• Fast delivery via Cat Lai, Cai Mep, and ICD terminals

• Contract delivery terms: FOB, CIF, CNF, DDP (selected markets)

FAQ – Rubber SVR 3L product related questions

1. Can SVR 3L be blended with other rubber grades?

Yes. SVR 3L is often blended with SVR 10 or SVR 20 to reduce compound costs while maintaining key performance properties, especially in tire mixing, hose production and molded technical parts.

2. What is SVR 3L rubber used for?

SVR 3L is widely applied across multiple industries requiring high cleanliness and stable viscosity:

• Tire & automotive: passenger tires, truck tires, motorcycle tires, aircraft tires

• Industrial rubber goods: belts, hoses, gaskets, seals, vibration pads, molded components

• Electrical & cable: insulation and outer sheathing due to dielectric strength and moisture resistance

• Medical & hygiene: gloves, tubing, stoppers thanks to low impurity and safety compliance

• Footwear & consumer goods: soles, anti-slip mats, flexible household rubber items

3. How does SVR 3L differ from RSS?

SVR 3L has:

• lower dirt (≤0.03%)

• lighter color

• more stable Mooney viscosity

• better consistency for mixing

RSS1 & RSS3 typically contain more non-rubber content and have darker shade due to smoke-drying.

4. Why is it called “3L”?

“3L” refers to Light – Light – Light, indicating:

• very light-colored rubber sheet

• low impurity content

• suitability for light-tone, high-purity applications (medical, cables, molded goods)

5. What is the Mooney viscosity range of SVR 3L from Ngoc Chau?

The typical Mooney viscosity range for SVR 3L from Ngoc Chau is:

• ML(1+4) at 100°C: 70–90

This controlled range ensures stable processing and predictable compound rheology for OEM mixers.

6. Can Ngoc Chau provide COA and samples before ordering?

Yes. Every shipment and trial batch includes:

• Batch-specific COA

• DRC, PRI, dirt, ash, Mooney results

• Loading photos + container sealing report (if required)

Samples are also available for testing prior to contract confirmation.

Conclusion

SVR 3L is a premium natural rubber trusted for its purity, durability, and stable quality. Meeting global standards, it supports industries from tires to medical and technical products. Choose Ngoc Chau Natural Rubber as your reliable partner for sustainable rubber solutions — contact us today to experience the difference in every natural SVR rubber 3L shipment.

📞 Hotline / Mobile: +84 762 798 888
✉️ Email: info@ngocchausupplier.com
🌐 Website: www.ngocchausupplier.com