PP Shaoxing Sanyuan T30S

PP Shaoxing Sanyuan T30S Resin

Material Introduction: PP Shaoxing Sanyuan T30S is high‑rigidity food‑contact certified general‑purpose homopolymer polypropylene (PP‑H). It is designed for low‑cost, high‑efficiency injection‑molded daily‑use articles and packaging applications, featuring stable processability and basic mechanical strength, while limited in low‑temperature toughness.

Main Applications

Woven products: Traditional and primary application, including woven bags, tarpaulins, FIBC bulk bags, carpet backing, artificial turf, strapping ropes and packaging ropes. Good tensile strength and low elongation satisfy these application requirements.

Injection‑molded products: Daily‑use articles and general‑purpose parts such as buckets, basins, stools, toys, household goods and small containers. Good flow property adapts to injection‑molding processing.

Films & fibers: Used for tear‑film, monofilaments and spinning fibers.

Food packaging: Partial T30S grades pass food‑contact certifications including GB 9693‑88 and US FDA, applicable for food containers and pharmaceutical packaging. Please confirm whether this grade from Shaoxing Sanyuan holds corresponding certifications.

Performance Parameters

Performance Category	Test Item	Typical Value	Test Condition / Reference Standard	Remarks & Interpretation
Physical Properties	Density	0.90‑0.91 g/cm³	ASTM D792, ISO 1183	General‑purpose homopolymer PP‑H
	Melt Flow Rate(MFR)	2.5‑4.0 g/10min	230℃/2.16kg, ASTM D1238	‑
	Molding Shrinkage	1.8‑2.5%	ASTM D955	‑
Mechanical Properties	Tensile Yield Strength	29‑35 MPa	ASTM D638, ISO 527	‑
	Flexural Modulus	1150‑1550 MPa	ASTM D790, ISO 178	‑
	Izod Notched Impact Strength	35‑55 J/m (23℃)	ASTM D256, ISO 180	‑
	Rockwell Hardness(R scale)	90‑102 R	ASTM D785	‑
	Elongation at Break	≥12%	ASTM D638	‑
Thermal Properties	Heat‑Distortion Temperature(HDT)	86‑110 ℃ (0.45 MPa)	ASTM D648	‑
	Vicat Softening Temperature	150‑156 ℃	ASTM D1525	‑
Other Properties	Ash Content	≤0.04%	ASTM D5630	‑

Processing Parameters

Processing Item	Reference Range	Remarks & Instructions
Drying Treatment	Normally not required	PP water absorption approx.0.01%‑0.04%. Drying is unnecessary under proper storage. Dry at 80‑100 ℃ for 1‑2 h if material gets damp.
Barrel Temperature	200‑280℃	Homopolymer PP melting point:165‑170℃. Zone example: rear zone 160‑180℃；middle zone 180‑210℃；front zone 200‑230℃. Do not exceed 275 ℃ to prevent material degradation.
Mold Temperature	40‑80℃	Recommended:50℃. Higher mold temperature improves surface gloss, dimensional stability and crystallinity yet increases cooling time and shrinkage rate. Lower mold temperature shortens cycle time but may cause poor surface appearance and warpage.
Injection Pressure	70‑120 MPa	Adjust based on flow length, wall thickness and structural complexity. PP melt viscosity is sensitive to shear rate; raising injection pressure is usually more effective to improve flowability than raising temperature.
Holding Pressure	30%‑60% of injection pressure	Sufficient holding pressure reduces shrinkage and sink marks. Avoid overly long holding time to prevent excessive internal stress.
Injection Speed	Medium‑high speed	High‑speed injection helps reduce internal stress, especially for thin‑wall articles. Reduce injection speed or raise melt temperature if surface defects such as gas marks appear.
Back Pressure	0.5‑1.0 MPa	Moderate back‑pressure improves melt homogenization and venting, not mandatory.
Screw Speed	50‑100 rpm	Avoid excessive screw speed to prevent shear‑induced overheating.

Disclaimer: All above data is for reference only.