Rifeng H

Description

PMI Structural Foam
Rifeng H is a closed-cell rigid foam base on Polymethacrylimide (PMI) polymer, that is completely free of CFC’s. It's with Coarse Cell Size. It has excellent machinability and surface adhesion. As sandwich structure material, it has good fastness to be combined with skin.

Rifeng H has been designed for use primarily in aeronautic and aerospace applications. Such as military/civil aircraft, aerospace, launching rocket, UAV, etc. Its outstanding properties make it an ideal material solution for aircraft components.

Processing and Production
Of all the Rifeng PMI foam grades, Rifeng H is the grade that is best suited to withstand the most demanding process conditions: Curing temperatures up to 180°C and maximum pressures up to 0.7 MPa (dependent upon density).

RifengH is highly suited to autoclave technologies and vacuum infusion processes, RTM, VARTM, VARI, HP-RTM, etc.

Weight Saving
When building composite sandwich components, lightweight Rifeng H has a closed cell structure that ensures the resin stays exactly where you want it – in the interface. This eliminates excess and unnecessary resin that adds undesirable weight to the finished parts.

Thermoforming and Shaping
Rifeng H can be easily thermoformed or CNC machined to meet customer requirements. High precision, pre-shaped and ready-to-use foam cores in simple or complex geometries can also be supplied by us.

Mechanical Properties

Property	Test Method	Unit	Rifeng 52H	Rifeng 75H	Rifeng 110H
Density	ASTM D1622	Kg/m3	52±12	75±15	110±20
Compressive Strength	ASTM D1621	MPa	1.0	1.6	3.2
Compressive Modulus	ASTM D1621	MPa	45	75	120
Tensile Strength	ASTM D638	MPa	1.9	2.8	3.6
Elastic Modulus	ASTM D638	MPa	60	95	155
Shear Strength	ASTM C273	MPa	0.9	1.4	2.4
Shear Modulus	ASTM C273	MPa	25	35	55
Heat distortion	DIN 53424	℃	≧200	≧200	≧200

Technical data values presented are typical for nominal density, subject to normal manufacturing variations, not applicable for designing and acceptance. Please contact our QA team for material criterion and standard.

Density values are valid for full-size sheets with a minimum thickness of 10 mm(0.39 inch) only. Other density ranges are available upon request.

Sales range for Rifeng H

Rifeng WH	Size (mm)	Thickness (mm)
52 H	2500 x 1300	1~100
75 H	2500 x 1300	1~90
110 H	2500 x 1300	1~75

All dimension ranges presented in these tables are standard. To discuss any size or thickness not listed, please contact a Rifeng representative.

Thickness tolerance ± 0.2 mm, length/ width tolerance ± 2 mm, other tolerances available on request.