Premium S.T.R. XL (Extra Low Impurity, Light
Overview: STR XL – The Ultimate in Purity
Standard Thai Rubber XL (S.T.R. XL) represents the zenith of quality among technically specified natural rubber grades derived from fresh field latex. This premium grade is specifically engineered for applications demanding the absolute lowest impurity levels and the lightest possible color. Our S.T.R. XL is the result of an exhaustive production process that prioritizes cleanliness, making it the superior choice where visual consistency and ultra-low dirt content are non-negotiable.
Key Technical Specifications
Our S.T.R. XL is stringently controlled to meet or surpass the most demanding industry specifications. Its defining characteristic is the low impurity level and color limit:
Characteristic | Max. Limit (Guaranteed) |
Dirt Content (wt. %) | 0.02 |
Ash Content (wt. %) | 0.40 |
Nitrogen Content (wt. %) | 0.50 |
Volatile Matter (wt. %) | 0.80 |
Initial Plasticity ($P_o$) | 35 min. |
Plasticity Retention Index (PRI) | 60 min. |
Lovibond Color (Units, Max) | 4 |
Ultra-Premium Grade Advantages
Unrivaled Purity (Dirt $\leq 0.02\%$): With a maximum dirt content of just 0.02%, our S.T.R. XL contains half the impurities of the already high-grade S.T.R. 5L. This ultra-low standard is crucial for producing defect-free, high-end products.
Excellent Color Consistency: By controlling the Lovibond color units to a maximum of 4, the material maintains an exceptionally light and consistent appearance, making it the only choice for color-sensitive final products.
Manufactured Exclusively from Latex: S.T.R. XL is derived directly from fresh, high-quality natural latex, bypassing the use of cup lumps or other field coagulation materials, which naturally results in superior purity and color.
🎯 Recommended Applications
S.T.R. XL is reserved for the most specialized and aesthetically demanding applications:
Medical and Healthcare: Surgical gloves, catheters, and highly sensitive rubber devices.
Light-Colored/Transparent Products: Footwear soles, specialized translucent seals, and light-colored extruded profiles.
Premium Technical Goods: High-specification components where even microscopic impurities could compromise performance or appearance.
📦 Packaging and Logistics
Weight: Standard $33.33 \text{ kg}$ compressed bales (or $35 \text{ kg}$ upon request).
Packaging: Transparent or white polyethylene wrap, suitable for high-purity products.
Certification: Full testing documentation provided for every batch, confirming compliance with all XL standards.
STR XL
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