PA6 XINHUI MEIDA M2500I Resin

Material Introduction: PA6 XINHUI MEIDA M2500I is a non‑reinforced medical‑grade PA6 resin. It features good mechanical strength, wear resistance, medical safety and processing flowability. Strict control of monomer residue and moisture content satisfies special requirements for medical applications. It has relatively low heat‑deflection temperature, and strict drying is required before processing due to inherent hygroscopicity of PA6.

Main Applications

Medical devices: Housings, handles and accessories for medical instruments, non‑critical components not in direct contact with human tissues (final products shall comply with corresponding medical device certification requirements).

Medical packaging: Partial medical‑packaging materials.

Mechanical parts: Bearings, gears, cams, pulleys, pump impellers, fan blades, sealing rings and other general mechanical components.

Other fields: Electronic‑electrical parts such as coil bobbins and switches, daily‑use consumer goods.

Performance Parameters

Performance Category	Test Condition / Standard	Unit	Typical Value	Remarks & Interpretation
Physical Properties
Density	GB 1033‑86	g/cm³	1.14	Medical‑grade unreinforced PA6
Saturated Water Absorption	‑	%	8.0‑9.5	‑
Molding Shrinkage	‑	%	1.3	‑
Mechanical Properties
Tensile Strength	ASTM D‑638	MPa	73.3	‑
Elongation at Break	ASTM D‑638	%	32.5	‑
Flexural Strength	ASTM D‑790	MPa	113.1	‑
Flexural Modulus	ASTM D‑790	MPa	2203.9	‑
Tensile Modulus	ASTM D‑638	MPa	2528.5	‑
Notched Impact Strength	ASTM D‑256	kJ/m²	10.2	‑
Brinell Hardness	ASTM D‑785	Kgf/mm²	15.2	‑
Thermal Properties
HDT (1.82 MPa)	ASTM D‑648	℃	53	Relatively low for PA6
Melting Point (Tm)	‑	℃	215‑225	‑
Electrical Properties
Dielectric Constant	ASTM D‑150 (MHZ)	‑	3.3	‑
Dielectric Loss Tangent	ASTM D‑150 (MHZ)	‑	0.028	‑
Flammability
UL94 Rating	‑	‑	V‑2	‑
Other Properties
MFR	ASTM D‑1238	g/10min	26.4	‑
Relative Viscosity	GB/T1632‑93	‑	2.50	‑
Monomer Content	QB/44072JW010‑91	%	≤0.5	Strictly controlled for medical use
Moisture Content	QB/44072LW010‑91	%	≤0.05	Raw‑material index

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 drop. 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. PA6 shows distinct melting point with relatively poor thermal stability.
Mold Temperature	60‑90 ℃ for most parts.	Higher mold temperature improves crystallinity, surface gloss and mechanical performance yet increases molding shrinkage. Lower mold temperature brings better toughness. High mold temperature is recommended for thin‑wall or complex‑structure parts.
Injection Pressure	60‑100 MPa.	Low‑viscosity PA6 with good flowability but fast cooling. Higher pressure is needed for complex / thin‑wall parts; excessive pressure causes flash.
Injection Speed	High speed.	Fast filling prevents flow marks and short‑shot caused by rapid cooling.
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.	Avoid excessive shear heat build‑up.
Runner & Gate	Gate bore ≥0.5*t (t = wall thickness of molded part). Minimum diameter for submarine gate ≥0.75 mm.	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	1.3% (typical for M2500I).	Subject to process parameters and product design.

Disclaimer: All above data is for reference only.