RSS 1 Natural Rubber from Vietnam – Trusted Vietnam Supplier & Exporter

Ribbed Smoked Sheet Grade 1 (RSS 1) is the highest-quality natural rubber within the RSS family, produced through a meticulous process of coagulation, sheeting, drying, and smoking to ensure minimal impurities, bubbles, and contaminants. Renowned for its exceptional purity, elasticity, and durability, RSS 1 is the preferred choice for demanding industries such as premium automotive tires, sports equipment, and other heavy-duty applications requiring consistent performance. In contrast, liquid-based manufacturing processes often rely on Natural Rubber Latex 60% DRC for dipping and foaming.

As a trusted Vietnam supplier and exporter to global markets, Ngoc Chau Natural Rubber proudly delivers international-standard RSS 1 to global partners, backed by strict quality control, competitive pricing, and sustainable sourcing. With technical expertise, eco-friendly practices, and professional service, we are committed to providing stable, high-performance rubber and building long-term, reliable partnerships worldwide.

What RSS 1 Stands For

Ribbed: The rubber sheets are pressed into a ribbed (grooved) form, which improves drying efficiency and prevents the sheets from sticking together.

Smoked: The sheets are dried in traditional smokehouses, a process that helps preserve the rubber, prevents mold, and gives the sheets their distinctive brownish color.

Sheet: The final product is shaped into flat sheets, making it easier to grade, package, and transport.

Grade 1: This designation represents the highest visual quality in the RSS family, with the fewest imperfections such as oxidized spots, air bubbles, or foreign matter.

Key Characteristics of RSS 1

High Quality and Purity

RSS 1 is the top grade of Ribbed Smoked Sheet, produced with minimal impurities and free from blemishes, rust, bark specks, or foreign matter.

Durability and Performance

It offers high tensile strength, elasticity, and resistance to wear and tear, ensuring long-lasting performance even in heavy-duty applications.

Uniform Appearance

The sheets are light-colored, evenly smoked, and structurally sound, reflecting superior processing and consistent quality.

Reliable for Industrial Use

Standardized grading guarantees uniform properties and makes RSS 1 a dependable choice for industries such as automotive tires, sports equipment, and other high-performance products sourced from a dependable and consistent supplier.

Packaging & Container Specifications for RSS 1 Natural Rubber

RSS 1 natural rubber sheets are compressed into solid bales of 33.33 kg or 35 kg per bale, wrapped in PE film for protection.

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

Production Process Of RSS 1 Natural Rubber

The manufacturing of Ribbed Smoked Sheets (RSS) follows a controlled and standardized workflow to ensure consistency, purity, and compliance with international quality requirements expected from a professional rubber manufacturer. The process includes the following key stages:

1. Coagulation

Fresh natural rubber latex is first treated with a mild acid—typically formic acid—to initiate coagulation. This transforms the liquid latex into solid rubber blocks. At this stage, proper pH control is critical to ensure uniform coagulation, minimize trapped impurities, and maintain the integrity of the rubber matrix.

2. Sheeting

The coagulated rubber blocks are then fed into a sheeting line. Here, they are sliced and pressed into thin, uniform sheets. Thickness control is essential, as it directly impacts drying efficiency, mechanical properties, and final grading.

3. Washing

Each rubber sheet is thoroughly washed using clean water to remove residual acid, dirt, and micro-impurities. This step ensures chemical neutrality and prevents defects during downstream processing. High-quality washing improves final sheet clarity and enhances grading accuracy.

4. Rolling

The washed sheets pass through mechanical rollers that create the characteristic ribbed pattern. Rolling helps remove excess water, increases sheet density, and improves surface texture. The ribbed structure also enhances airflow during drying and smoking.

5. Drying & Smoking

Sheets are then transferred to smokehouses, where they undergo controlled air-drying followed by a 24-hour smoking process.

• Air-drying stabilizes moisture content and prepares the sheets for smoking.

• Smoking at regulated temperature and humidity improves oxidation resistance, eliminates residual micro-organisms, and gives the sheets their distinctive color and aroma.
  Importantly, smoking enhances sheet transparency, making impurities easier to detect during visual grading.

6. Grading

Once fully dried, the sheets are visually inspected and classified according to RSS standards. The grading criteria include:

• Purity (absence of dirt and bubbles)

• Color consistency

• Clarity and transparency

• Surface uniformity

• Absence of defects such as mold or blemishes

The product is categorized from RSS1 (premium grade) to RSS5 (standard grade), with mid-range grades like RSS 3 natural rubber widely used for general industrial applications.

How RSS is Graded

RSS grades (RSS1, RSS2, RSS3, etc.) are classified visually based on cleanliness, color, and surface defects, following international grading standards.

Higher grades such as RSS1 show:

• Lower dirt and ash content

• Better transparency

• More uniform color

• Fewer blemishes and bubbles

These characteristics often correlate with improved mechanical consistency and processing reliability for demanding industrial applications.

Common Uses and Applications of RSS 1 Natural Rubber

Tire Production

RSS 1 is widely used in high-performance tires for trucks, buses, race cars, and aircraft, valued for its tensile strength ≥ 19 MPa and outstanding abrasion resistance, ensuring durability and safety on the road.

Industrial Products

An essential raw material for conveyor belts, engine mounts, gaskets, and shock absorbers, where long-term reliability and stability under heavy loads are critical.

Other Applications

Its versatility extends to seals, vibration dampening systems, footwear soles, and specialty rubber tubes, while technically specified compounds may also use SVR 3L natural rubber for consistent processing performance.

Why Choose RSS 1 Natural Rubber from Ngoc Chau Natural Rubber?

When it comes to premium natural rubber, Ngoc Chau Natural Rubber delivers RSS 1 that meets the most demanding global standards — Proudly made in Vietnam, trusted globally as a recognized Vietnam supplier of natural rubber.

1. Proven Reliability
A trusted Vietnamese exporter with a solid track record, supplying global manufacturers with consistency and professionalism as a stable export partner.

2. International-Standard Quality
Every RSS 1 sheet is produced under strict quality control by an experienced manufacturer:

• Mooney viscosity: 60–90

• Dirt content: ≤ 0.02%

• Tensile strength: ≥ 19 MPa

• Volatile matter: ≤ 0.8%
  This ensures superior purity, elasticity, and durability.

3. Competitive and Cost-Effective
We combine top-grade performance with competitive pricing, giving manufacturers both quality and value.

4. Customer-First Service
From expert consultation to fast delivery and dedicated after-sales support, we provide a smooth, reliable experience for every partner.

5. Practical Industrial Applications
Our RSS 1 is ideal for premium tires, sports equipment, industrial hoses, gaskets, and heavy-duty rubber products, ensuring consistent performance in demanding conditions.

Conclusion

RSS 1 Natural Rubber is the premium grade of ribbed smoked sheet, delivering exceptional purity, elasticity, and durability for high-performance tires, industrial components, and heavy-duty applications.

At Ngoc Chau Natural Rubber, we supply ISO/TCVN-certified RSS 1, produced under strict quality control, sustainable sourcing, and competitive pricing. With professional service and reliable global logistics, we ensure every shipment meets international standards as a trusted Vietnam supplier serving global buyers.

👉 Contact us today for samples, quotations, and partnership opportunities — and discover why global manufacturers trust Ngoc Chau as their long-term partner in natural rubber and as a dependable long-term partner.

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

FAQ – RSS 1 Natural Rubber

1. What is RSS 1?
RSS 1 (Ribbed Smoked Sheet Grade 1) is the top grade of ribbed smoked sheets, known for minimal impurities, high tensile strength, and excellent durability.

2. Where is RSS 1 used?
Mainly in tires (trucks, buses, race cars, aircraft) and industrial products such as conveyor belts, gaskets, seals, shock absorbers, and footwear soles.

3. Why choose RSS 1 over other grades?
Because it is the cleanest and highest-quality grade, offering uniform color, strong elasticity, and reliable performance for demanding industries.

4. How is RSS 1 packaged?
RSS 1 is packed in 33.33 kg or 35 kg bales wrapped in PE film, shipped either as loose bales (600–630 bales/20DC) or on pallets (16 pallets/20DC).

5. What are the technical specifications?
Typical specs: Mooney Viscosity 60–90, Dirt Content ≤ 0.02%, Tensile Strength ≥ 19 MPa, Volatile Matter ≤ 0.8%.

6. Can Ngoc Chau provide COA or certifications?
Yes. We supply a full Certificate of Analysis (COA) and international certifications (ISO, TCVN) with every shipment.

7. What incoterms and payment terms are available?
We offer flexible terms including FOB, CIF, CFR, with payment options such as L/C or T/T, depending on buyer requirements.

8. Why buy from Ngoc Chau Natural Rubber?
Because we combine international-standard quality, competitive pricing, reliable logistics, and professional support, making us a trusted long-term partner for global manufacturers.