WHAT IS SVR 3L (TSR 3L) NATURAL RUBBER?
DEFINITION
SVR 3L (TSR 3L) is a high quality natural rubber with light color, in the form of crumb rubber (or block rubber).
SVR 3L is common in preliminarily processed rubber and produced by many factories in Vietnam.
The main source of raw materials for SVR 3L natural rubber production is field latex. In Vietnam, raw field latex is divided into two main sources: rubber fields owned by state-owned companies and raw materials from smallholders and traders.
Key features of SVR 3L natural rubber include:
- Light color
- High level of purity: Lowest dirt content among TSR grades.
- High elasticity and elongation
- Good aging resistance
- Stable Performance: High PRI and good mechanical strength.
APPLICATIONS
In order to meet the products of L or 3L grade, it must satisfy important characteristics such as Po, color (Lovibond), dirt content, storage … in standard TCVN 3769: 2016. With high PO parameter characteristics (PO> 35), SVR 3L natural rubber products are applied to products that require high elasticity as well as high abrasion resistance.
Common applications of SVR 3L natural rubber include car tires, belts, power cables, bicycle guts, washers, other rubber parts in cars, etc.
Another key point, SVR 3L is also used in products that need light color high quality straps, cables, shoe soles, medical products, electronics industry, high quality products in the medical industry…
- 2 FACTORIES
Located in Binh Phuoc Province and Kontum Province, Vietnam
- 40,000 MT/YEAR
SVR3L – 20,000/y
SVR10 – 20,000/y
- QUALITY
All products meet TCVN 3769:2016 standard
- GREEN
Advanced wastewater treatment technology
SVR 3L QUALITY SPECIFICATIONS ACCORDING TO TCVN 3769:2016
In particular, SVR 3L is also known as block rubber is graded according to precise technical parameters such as dirt content, ash content, nitrogen content, volatile matter and properties of the rubber such as its Wallace Plasticity (PO) and its Plasticity Retention Index (PRI).
- Dirt content (max% wt), retained on 45 micron sieve: 0.03
- Ash content (max % wt): 0.50
- Nitrogen content (max % wt): 0.60
- Volatile matter (max % wt): 0.80
- Initial plasticity ( Po ) (min): 35
- Plasticity retention index (PRI) (min): 60
- Lovibond Color Index (max) Difference between samples (max): 6
PRODUCTION PROCESS OF SVR 3L at APT RUBBER
SVR 3L is produced entirely from latex of garden plants according to Vietnamese standards (TCVN: 3769:2016) as followed:
Step 1: Latex Collection
- Natural latex is tapped from Hevea brasiliensis trees.
- Collected latex is preserved with ammonia to prevent premature coagulation.
Step 2: Coagulation
- Fresh latex is coagulated using formic acid or acetic acid.
- The coagulum (rubber lump) is washed thoroughly to remove impurities (dirt, bark, proteins).
Step 3: Pre-Processing
- Coagulated sheets are passed through crepers and shredders to reduce size.
- Continuous washing with clean water ensures removal of dirt and non-rubber substances.
Step 4: Drying
- Processed rubber is dried in hot-air drying ovens at controlled temperatures.
- This step stabilizes the rubber and removes excess moisture (target moisture ≤ 0.8%).
Step 5: Grading & Quality Control
- Rubber is tested for dirt content, ash, nitrogen, and PRI (Plasticity Retention Index).
- SVR 3L must meet strict Vietnamese Standards (TCVN 3769).
- This grade is known for light color, low dirt content (≤ 0.02%), and high consistency.
Step 6: Baling & Packaging
- Dried rubber blocks are pressed into 33.33 kg or 35 kg bales.
- Wrapped in PE film and strapped on 1.2 MT wooden or steel pallets.
- Each bale is stamped with batch code, grade, and production date for traceability.
Step 7. Storage & Shipment
- Stored in clean, dry warehouses.
- Ready for export under EUDR compliance, with COA (Certificate of Analysis) and shipping docs prepared.
Finally, our SVR 3L 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 3L FROM APT RUBBER?
The answers are pretty concrete:
- Light color
- 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 3L range has been welcomed in global markets such as USA, India, Korea, Malaysia…
- EUDR Compliance: EUDR-Compliant Natural Rubber SVR 3L 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:
