Swiss-Shield® NATURELL ARBOR FR™ | Fire protection shielding fabric

Product Overview

Swiss Shield Naturell Arbor FR is a fire-protection shielding fabric — the world's first to achieve fire protection class 5.3 under EU standard EN 13773. It was engineered for buildings with strict fire-safety requirements such as hospitals, aged-care homes and public facilities, while also providing excellent shielding against high-frequency (HF) electromagnetic radiation.

The fabric is built on LENZING™ Lyocell FR fibres, which retain their fire-protection class even under heat or chemical exposure, woven with Swiss Shield's patented silvered-copper yarn for around 40 dB of HF attenuation. The Lyocell fibre is derived from certified renewable wood through an ecologically responsible process.

Please note this is a pre-order item with a delivery time of 1–2 weeks. It is sold in 30 cm lengths (250 cm wide × 30 cm); multiple quantities are cut as one continuous length.

Key Features

• World's first shielding fabric rated fire protection class 5.3 to EN 13773
• Around 40 dB of HF shielding attenuation, verified up to 9.5 GHz
• LENZING™ Lyocell FR fibres keep their fire rating under heat and chemical exposure
• Sustainable, made from certified renewable wood fibre
• Translucent ecru-white weave suited to curtains, dividers and workwear
• OEKO-TEX Standard 100, Class 1 certified; fire performance tested by EMPA
• Manufactured in Switzerland with a patented, invisible high-tech yarn
• 250 cm wide

Technical Specifications

Dimensions

Width: 250 cm, ±2 cm

Sold by: 30 cm lengths (cut continuously for multiple quantities)

Materials

Composition: 82% LENZING™ Lyocell FR, 17% copper, 1% silver

Construction: spun with a 0.02 mm silvered-copper thread

Colour: ecru-white, translucent

Weight: approx. 69 g/m²

Dimensional stability: ±3–5%

Fire Protection

Rating: fire protection class 5.3 under EU standard EN 13773 — a world first for a shielding fabric

Testing: fire performance verified by EMPA

Shielding Performance

High-frequency (HF) shielding attenuation. Measurements are conducted from 600 MHz to 40 GHz per ASTM D4935-10 / IEEE Std 299-2006; representative values:

• 900 MHz (GSM): 37 dB
• 1.8 GHz (GSM): 35 dB
• 2.45 GHz (Bluetooth / Wi-Fi): 34 dB
• 5.8 GHz (Wi-Fi): 27 dB
• 9.5 GHz (X-band radar): 20 dB

Surface: non-conductive (PES-coated). Internal conductive parts cannot be contacted or grounded, so individual panels do not shield low-frequency (LF) electric fields. Used as a full Faraday cage (all six sides), it removes LF electric fields inside, verifiable by potential-free measurement.

Certification

OEKO-TEX Standard 100, Class 1 and EN 13773 fire protection class 5.3.

Care Instructions

Important: this fabric must not be machine washed or hand washed.

• Do not wash with water; no hand wash
• Professional dry cleaning (P) at a cleaner experienced with viscose is recommended
• Do not tumble dry
• Do not bleach
• Iron without steam on the lowest setting

Applications

• Curtains and room dividers in hospitals, aged-care homes and public buildings
• Fire-sensitive environments needing EMF shielding
• Protective workwear
• Furniture and soft furnishings
• Any setting where both fire safety and HF shielding are required

Technical Documents

Laboratory & expert shielding-attenuation reports: view the testing reports (PDF). Every batch is checked in Swiss Shield's own EMV laboratory and independently verified by an accredited expert.

Safety information: This fabric contains fine metallic threads. While it is fire-protection rated, keep it away from exposed electrical outlets and wiring to ensure safe use.