PA6 Yangmei Chemical 2750 Resin

Material Introduction: PA6 Yangmei Chemical 2750 is injection‑molding grade PA6 resin. It features good wear resistance and self‑lubricating property, high mechanical strength, excellent toughness, good fatigue resistance, outstanding thermal, oil‑resistance and chemical‑resistant performance. It is hygroscopic (equilibrium water absorption approx.3.5%), and shows poor resistance to strong acids and oxidizing agents.

Main Applications

Mechanical parts: Bearings, gears, cams, pulleys, pump impellers, fan blades, sealing rings, wear‑resistant bushings, utilizing its wear‑resistance and self‑lubricating performance.

Automotive parts: Fuel hoses, oil reservoirs, protective covers, support brackets, wheel housings, engine covers, door handles and other auto components.

Electronic & electrical: Electrical coils, cable connectors, various rollers, cable sheaths and related parts.

Consumer goods: Tool handles, furniture fittings, household storage containers and so on.

Performance Parameters

Performance Category	Test Standard	Unit	Typical Value / Range	Remarks & Interpretation
Physical Properties
Density	ISO 1183	g/cm³	1.13‑1.15	Un‑reinforced injection PA6
Saturated Water Absorption	ISO 62	%	≈9‑10 (max)	Greatly affects dimension and performance
Mechanical Properties
Tensile Strength (Yield)	ISO 527‑2	MPa	70‑85 (23℃,50%RH)	Higher in dry state, drops after moisture absorption
Elongation at Break	ISO 527‑2	%	30‑50 (23℃,50%RH)	Toughness increases after moisture uptake
Flexural Strength	ISO 178	MPa	90‑120 (23℃,50%RH)	‑
Flexural Modulus	ISO 178	MPa	2500‑3200 (23℃,50%RH)	‑
Charpy Notched Impact Strength	ISO 179/1eA	kJ/m²	5‑8 (23℃,50%RH)	‑
Rockwell Hardness	ASTM D785	‑	M80‑M100 (R Scale ~118)	‑
Thermal Properties
Melting Point (Tm)	ISO 11357‑3	℃	215‑225	Typical range for PA6
HDT (1.8 MPa)	ISO 75‑2	℃	60‑80 (un‑reinforced)	Strongly influenced by humidity; higher under dry condition
Electrical Properties
Volume Resistivity	IEC 62631‑3	Ω·cm	＞10¹⁴ (dry)	Drops significantly under humid condition
Dielectric Strength	IEC 60243‑1	kV/mm	20‑30	‑

Injection Molding Parameters

Processing Item	Recommended Range / Condition	Notes & Explanations
Drying Treatment	Hot‑air drying at 80‑100℃ for minimum 4‑6 h; vacuum drying preferred.	Critical operation. Keep moisture ≤0.2% to avoid hydrolysis, bubbles, silver streaks and strength loss. Use immediately after drying or seal properly for heat preservation.
Melt Temperature	230‑280℃ general range.	Depends on equipment and articles. Do not exceed 300℃; avoid long‑time high‑temperature residence to prevent degradation & discoloration.
Mold Temperature	60‑90℃ for most parts.	Higher mold temperature improves crystallinity, surface gloss and mechanical properties yet increases molding shrinkage. Lower mold temperature brings better toughness for thin‑wall articles.
Injection Pressure	60‑100 MPa.	PA6 features low melt viscosity and fast solidification. Adjust according to product structure & wall‑thickness; higher pressure may be required for complex / thin‑wall parts. Excessive pressure causes flash.
Injection Speed	Medium‑high speed.	Proper fast filling prevents short‑shot and flow marks caused by rapid cooling; over‑fast speed may lead to poor venting and gas marks.
Back Pressure	0.5‑1.0 MPa (5‑10 kgf/cm²).	Proper back‑pressure promotes melt homogenization and venting; excessive back‑pressure reduces plasticizing efficiency and may trigger overheating.
Screw Speed	Medium speed (50‑120 rpm recommended).	Avoid excessive shear generating extra heat.
Runner & Gate	Runner and gate dimension shall not be too small.	PA6 solidifies fast; sufficient gate size guarantees smooth filling.
Shutdown Notice	Purge barrel with PE / PP of good thermal stability after production or shutdown to prevent carbonized nylon residue. Turn off heating system for long‑term shutdown.	‑

Disclaimer: All above data is for reference only.