NR-45 Grey/Red Multilayer Natural Rubber Membranes

Technical Specifications of NR-45 Grey/Red Membranes

• material: multilayer natural rubber;
• layer colours: grey and red;
• hardness: 45 Shore A;
• tensile strength: 20 MPa;
• operating temperature: up to 130 °C;
• available thicknesses: 2, 2.5, 3 and 4 mm;
• available widths: 1700 and 2000 mm, depending on the product;
• surface: smooth on one side and textile-impression on the other;
• standard roll length: 15 m.

The higher 45 Shore A hardness gives NR-45 Grey/Red a firmer structure than NR-40 membranes. This makes it suitable for applications where greater membrane stability is required during vacuum and overpressure pressing.

Multilayer Construction with Grey and Red Layers

NR-45 Grey/Red is manufactured from multiple layers of natural rubber in different colours. The grey and red layers form a single flexible membrane while remaining visually distinguishable.

The different layer colours make the multilayer construction easy to identify. They should not, however, be treated as a specified wear indicator unless this function is confirmed for the selected product.

Smooth and Textile-Impression Surfaces

The membrane has a smooth surface on one side and a textile-impression surface on the other. This surface configuration allows the membrane to be positioned according to the pressing process, workpiece and equipment requirements.

Before installation, determine which side should face the workpiece. The correct orientation may depend on the PVC foil, adhesive, pressing cycle and required surface result. Contact us if you need assistance before cutting or installing the membrane.

Designed for PVC Foil and Overpressure Presses

NR-45 Grey/Red membranes are particularly suitable for pressing PVC foil onto furniture fronts, doors and profiled MDF components. Their 45 Shore A hardness and multilayer construction make them a practical choice for membrane presses operating with vacuum and additional overpressure.

The membranes can be used in heated pressing processes at operating temperatures of up to 130 °C. This makes them suitable for forming PVC foil over shaped and CNC-machined surfaces when used in accordance with the press, foil and adhesive manufacturers’ requirements.

Recommended Applications

NR-45 Grey/Red multilayer membranes are suitable for:

• pressing PVC foil onto MDF furniture fronts;
• forming PVC foil over profiled and CNC-machined components;
• veneering and laminating furniture panels;
• manufacturing doors and interior components;
• use in vacuum membrane presses;
• use in membrane presses operating with vacuum and additional overpressure.

For applications requiring a softer and more flexible membrane, an NR-40 product may be more suitable. For continuous operation above 130 °C, select an appropriate silicone membrane.

Available Dimensions and Supply Options

NR-45 Grey/Red membranes are available in thicknesses of 2, 2.5, 3 and 4 mm and in widths of 1700 and 2000 mm. Available width and thickness combinations vary depending on the product.

Most products are supplied in complete rolls with a standard length of 15 m. Selected membranes can also be ordered in custom-cut lengths. Check the specifications and availability of the required size before ordering.

Verify the required membrane width, thickness and length and allow sufficient additional material for installation and clamping. Contact us if you need help selecting an NR-45 Grey/Red membrane for your vacuum or overpressure press.