🧩 SAN+ABS – Styrene Acrylonitrile + Acrylonitrile Butadiene Styrene

(High-quality technical material, rigid, glossy, and impact-resistant. Frequently used for frames, panels, caps, and visible interior automotive parts. The SAN+ABS combination offers a balance between clarity, hardness, and dimensional stability.)

🔹 What is SAN+ABS

SAN+ABS is a hybrid styrenic blend resulting from the combination of two copolymers: SAN (styrene-acrylonitrile) and ABS (acrylonitrile-butadiene-styrene).

This blend brings together the gloss and chemical resistance of SAN with the elasticity and toughness of ABS.

Result: an aesthetic, rigid material, easy to process, and stable at moderate temperatures. It is used in interior decorative parts, technical frames, panels, and visible components requiring a clean finish and scratch resistance.

🔧 Composition

• Styrene ($C_8H_8$): 55–65 %
• Acrylonitrile ($C_3H_3N$): 15–25 %
• Butadiene ($C_4H_6$): 5–15 %
• Density: 1.06–1.08 g/cm³
• Softening Point: ≈ 230–250 °C
• Chemical Resistance: Good (oils, mild solvents, detergents).
• UV Resistance: Medium (can be improved with ASA or PMMA additions).

🚗 Where SAN+ABS is used in the automotive industry

Component	Example parts	Observations
Car Interior	Vent frames, caps, panels	Glossy finish, rigid, no deformation
Light Exterior	Sensor caps, mirror housings	Good resistance to low impact
Equipment	Button housings, frames, modules	Good thermal and aesthetic stability
Decorative	Visible parts, glossy inserts	Smooth surface, high gloss

🔧 Welding Temperature and Methods

Method	Optimal Temperature	Observations
Hot Air	250 – 270 °C	Clean joint, good control
Heat Plate (Mirror)	240 – 260 °C	Ideal for flat edges
Manual Extrusion	240 – 260 °C	For long cracks or thick parts

🔩 What to Weld SAN+ABS With (Material Compatibility)

Being a styrenic material, SAN+ABS is compatible with most materials in the ABS, SAN, ASA, and PS families.

✅ Compatible with:

• SAN+ABS ↔ ABS / SAN / ASA / ABS+PMMA – excellent compatibility.
• SAN+ABS ↔ ABS+SAN / ABS+ASA / ASA+PC – very good compatibility.
• SAN+ABS ↔ ABS+PC / ASA+PMMA – partially compatible.

❌ Incompatible with:

• PP, PE, PA, PVC, TPO – different melting points and shrinkage rates.

💡 ReplastMD Recommendation:

Use standard ABS rods or SAN rods at 255–265 °C. Heating should be gradual to avoid overheating the gloss. For visible finishes, the gloss can be restored with a short hot air pass or acrylic polish.

🏭 Manufacturers and Trade Names

• INEOS Styrolution: Luran® S / Terblend® N
• BASF: Terblend® N / Novodur® Blend
• LG Chem: LUPOY® ABS+SAN
• Chi Mei: Polylac® SAN-ABS

🧠 How to Identify SAN+ABS

• Engraved marking: >SAN+ABS<, >ABS/SAN<, >Terblend<.
• Glossy, dense surface, slightly heavier than ABS.
• Yellow-blue flame, styrenic scent.
• Softens uniformly at ≈ 250 °C.
• Intermediate density between SAN and ABS.

🛠️ SAN+ABS Welding at ReplastMD:

At our service center in Chisinau (Ciocana sector), ReplastMD performs professional SAN+ABS welding for interior frames, decorative panels, and technical housings, ensuring an invisible joint and full structural rigidity.