PA6 SANNING SN2705B Resin

Material Introduction: PA6 SANNING SN2705B (Hubei Sanning) is a nylon‑6 resin featuring high flowability, wide injection‑molding temperature window, good high‑temperature resistance and favorable chemical stability.

Main Applications

Automotive industry: Lamp housings, interior parts, helping reduce vehicle weight and improve fuel efficiency.

Electronics industry: Housings for electronic components, suitable for high‑temperature and high‑load conditions.

Food & daily‑use articles: Food‑contact parts such as latch components for food storage boxes, electric‑toothbrush housings, taking advantage of food‑grade property and good surface gloss.

Medical devices: Housings for single‑use medical instruments with good sterilization stability.

Industrial & fiber applications: Mechanical parts, protective equipment; fiber grade for fishing nets, nylon ropes and others.

Performance Parameters

Performance Category	Test Standard	Unit	Typical Value / Range	Remarks & Interpretation
Physical Properties
Density	ISO 1183	g/cm³	1.13‑1.15	Typical PA6 range
Saturated Water Absorption	ISO 62	%	≈8.0‑9.5	Strongly affects dimension and performance
Equilibrium Water Absorption (23℃,50%RH)	ISO 62	%	≈2.5‑3.5	‑
Mechanical Properties
Tensile Strength (Yield)	ISO 527‑2	MPa	70‑80 (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	90‑110 (23℃,50%RH)	‑
Flexural Modulus	ISO 178	MPa	2500‑3000 (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 PA6 range
HDT (1.8 MPa)	ISO 75‑2	℃	60‑75 (unreinforced)	Greatly influenced by humidity; higher when dry
Electrical Properties
Volume Resistivity	IEC 62631‑3	Ω·cm	＞10¹⁴ (dry)	Drops significantly under humid conditions
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 at least 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 and discoloration.
Mold Temperature	60‑90 ℃ for most parts.	Higher mold temperature improves crystallinity, surface gloss and mechanical performance yet increases molding shrinkage. Lower mold temperature delivers better toughness for thin‑wall articles.
Injection Pressure	60‑100 MPa.	Low‑viscosity PA6 with good flowability but fast cooling. Increase pressure for complex / thin‑wall parts; excessive pressure causes flash.
Injection Speed	Medium‑high speed.	Fast filling prevents short‑shot and flow marks caused by rapid cooling; too fast may lead to poor venting and gas marks.
Back Pressure	0.5‑1.0 MPa (5‑10 kgf/cm²).	Proper back‑pressure homogenizes melt and improves venting; excessive back‑pressure reduces plasticizing efficiency and may trigger overheating.
Screw Speed	Medium speed (50‑120 rpm recommended).	Avoid excessive shear heat generation.
Runner & Gate	Runner and gate dimensions shall not be too small.	PA6 solidifies fast; sufficiently large gate ensures smooth filling.
Shutdown Notice	Purge barrel with PE / PP of good thermal stability on pause or shutdown to prevent carbonization of residual PA6; turn off heating system for long‑term shutdown.	‑
Molding Shrinkage	1.0%‑1.5%.	Typical for unreinforced PA6, subject to process parameters and product design.

Disclaimer: All above data is for reference only.