LLDPE Hanwha 7635

LLDPE Hanwha 7635 Resin

Material Introduction: LLDPE Hanwha 7635 is linear low‑density polyethylene. Renowned for high flowability, excellent optical properties (high gloss & low haze) and favorable mechanical performance, it is well‑suited for injection‑molded thin‑wall articles and components requiring premium appearance.

Main Applications

Household articles & toys: household utensils, toys, taking advantage of high flowability, high gloss and good toughness.

Film packaging: packaging films with favorable mechanical and optical performance.

Other applications: wire and cable compounds according to partial references.

The finished articles are non‑toxic, tasteless and odorless, compliant with FDA food‑contact standard CFR 177.1520(c) 3.1a. Compared with LDPE, it features higher softening & melting temperature, higher strength, superior toughness and rigidity, good heat & cold resistance, excellent environmental‑stress‑crack‑resistance, outstanding dart‑impact and tear resistance, as well as resistance to acid, alkali and organic solvents.

Performance Parameters

Performance Category	Test Item	Test Method / Condition	Value & Unit	Remarks & Interpretation
Basic Properties	Density	ASTM D‑1505	0.924 g/cm³	Typical density range for LLDPE.
	Melt Flow Rate (MFR)	ASTM D‑1238 (190°C/2.16kg)	20 g/10min	High flowability for easy injection cavity filling, ideal for thin‑wall products.
Mechanical Properties	Tensile Yield Strength	ASTM D‑638	110 (or 11.2 MPa)	Minor unit discrepancy among sources; indicates good tensile‑deformation resistance.
	Tensile Strength at Break	ASTM D‑638	112 (or 11.4 MPa)	Maximum stress the material can bear before fracture.
	Elongation at Break	ASTM D‑638	650 %	Excellent toughness and ductility, tolerates heavy deformation without fracture.
	Dart Drop Impact Strength	ASTM D‑1709	150 g	Film impact‑resistance indicator.
	Hardness	ASTM D‑1706	53 Shore D	Provides certain surface scratch‑resistance.
Thermal Properties	Vicat Softening Point	ASTM D‑1525	95 °C	Heat‑resistance indicator.
	Melting Point	ASTM D‑3417	124 °C	Complete melting temperature for processing reference.
	Brittleness Temperature	ASTM D‑746	＜‑76 °C	Retain toughness under ultra‑low temperature with excellent low‑temperature performance.
Optical Properties	Gloss (45°)	ASTM D‑2457	80 %	High gloss delivers bright surface appearance.
	Haze	ASTM D‑1009	10 %	Low haze brings good transparency.
Processing Property	Molding Shrinkage	‑	1.0‑3.0 %	Shrinkage range shall be considered for part design and mold manufacturing.

Injection‑Molding Process Parameters

Process Parameters	Recommended Range	Remarks & Interpretation
Drying Treatment	Normally not required	PE moisture absorption＜0.01%. Drying is unnecessary under good storage. Dry at 60‑70 °C for 1‑2 h as precaution if package damaged or high‑humidity environment.
Barrel Temperature	160‑220 °C	Temperature rises from rear zone to front zone. Crystalline polymer; barrel temperature shall be higher than melting point 124 °C. Start debugging at 180‑200 °C for this high‑MFR grade.
Mold Temperature	30‑60 °C	Mold temperature affects crystallization. Higher mold temperature brings higher crystallinity and strength yet larger shrinkage. Typical LDPE mold temperature:30‑45 ℃.
Injection Pressure	50‑100 MPa	Low melt viscosity and good flowability allow medium‑to‑low injection pressure. Excessive pressure causes flash. Adopt lower pressure for simple thick‑wall parts and higher pressure for complex parts.
Injection Speed	Medium‑high speed	High flow realizes fast filling, suitable for thin‑wall articles.
Holding Pressure	40%‑60% of injection pressure	Avoid excessive holding pressure and long holding time to reduce internal stress.
Back Pressure	0.5‑1.0 MPa	Low back pressure for melt compaction; excessive back pressure generates shear heat.
Screw Speed	Medium speed	Prevent excessive shear heat build‑up.

Disclaimer: All above data is for reference only.