PU FOAM (POLYURETHANE FOAM)

PU FOAM (POLYURETHANE FOAM)

1. Introduction

PU foam is a high-performance technical foam material synthesized from polyester foam and polyether foam based on polyurethane (PU). It features an open-cell structure, providing excellent elasticity and superior mechanical strength.

Thanks to the use of special PU raw materials, PU foam offers outstanding properties:

• High mechanical strength and long service life
• Excellent elasticity with fast shape recovery
• Low wear during continuous operation
• Non-oxidizing, non-rotting when exposed to water
• Stable performance in humid environments and harsh operating conditions

2. Technical Specifications

Standard / Shape Dimensions

Square Shape

Size	Length (mm)	Width (mm)	Height (mm)
Large	145	95	55 / 50 / 45 / 25
Medium	140	90	55 / 50 / 45 / 25
Small	120	80	55 / 50 / 45 / 25

Oval Shape

Size	Length (mm)	Width (mm)	Height (mm)
Large	170	120	55 / 50 / 45 / 25
Medium	140	90	55 / 50 / 45 / 25
Small	120	80	55 / 50 / 45 / 25

Physical Properties

Property	RH-M	RH-F	WR-246
Material	Polyurethane Foam (Ester)	Polyurethane Foam (Ester)	Polyurethane Foam (Ester)
Density (kg/m³)	33 – 36	28 – 30	15 – 20
Hardness (kPa)	4.5 – 5.5	3.5 – 4.5	3 – 4

Note: Custom shapes and dimensions can be manufactured according to customer requirements.

3. Applications

In technical ceramics and sanitary ware manufacturing, high-grade PU foam is widely used due to its stable elasticity, water resistance, non-rotting characteristics, low wear, and long service life.

A. Forming & Green Body Handling

• Cushioning support for green bodies during handling and transportation
• Lining for molds and worktables to prevent scratches and cracks
• Light shape adjustment for curved areas and edges

B. Smoothing & Cold Finishing

• Surface smoothing of green bodies
• Base foam for fine grinding pads, burr removal, and mold joint correction
• Reduced contact pressure for uniform surfaces and minimized sharp-edge defects

C. Glazing & Surface Finishing

• Removal of excess glaze; cleaning edges, drain holes, and technical grooves
• Creation of surface effects for special and effect glazes
• Resistant to degradation in humid, water-based, and glaze chemical environments