TM― Viscose Rayon Fiber―
Barrier that retains its structure evenin flames of 1000℃
Benefit1

Benefit2

Benefit3

FR CORONA is a uniquely processed
flameproof material made by adding
inorganic substances to viscose rayonfiber.
FR CORONA is a barrier against fire and excessive heat because the inorganic materials
in the fiber retains their structure in fires.
FR CORONA is halogen and phosphorus free for safety reasons. Therefore,
it generates less smoke and toxic gas
in fires.

11F Midosuji Daiwa Bldg. 6-8, Kyutaromachi 3-chome, Chuo-ku, Osaka City 541-0056
Mail: dr-kanri@daiwaborayon.co.jp Fax: +81-6-7635-3291

h t t ps : //da i w a b o r a yo n.c o .jp /e ng lish/“FR CORONA” is Daiwabo’s trademark in Japan.

Even in flames hot enough to cause a hole, the inorganic material in the fiber retains its structure,providing a barrier against fire and excessive heat.
Fireproof test
Heat thenonwoven
fabric witha burnerAfterheating for
20 minutes

The contact areaof the flame isabout 1000℃.

The inorganicmaterial in the fiber
retains its structure, so no holes
are formed.

[Temperature transfer to the back of the nonwoven fabric]
When the same test was performed using aramid non-woven fabric, holes formed instantly (Refer to graph). In the case of
FR CORONA, the inorganic material in the fiber retains its structure and does not cause holes, making it difficult for heatto transfer to the back side.

)

Fabric blend: FR CORONA 70% / Binder fiber 30%
Weight: 275 gsm
Thickness: 15 mm (High loft nonwoven fabric)

The test was stopped because a holeformed in the nonwoven fabric.

800Aramid non-woven fabric

600
400

FR CORONA non-woven fabric

200℃

Test site: Our laboratory

1000

Temperature (Test method (Our method)： The surface of the nonwoven fabric was set in apredetermined frame (25cm × 15cm) and heatedwith a burner. The condition of the surface of thenonwoven fabric was checked, and the temperatureof the back side of the nonwoven fabric wasmeasured with a thermometer over time.

0010Time (min)20

Typical Application of FR CORONA
Bed mattress application (Comply with CFR1633)

FR CORONA is recognized in the United States as an indispensable material for fireproofing bed mattresses.
CFR1633 ― Flammability standards for mattress sets (Open flames)
In the U.S., there is a set of flameproof performance requirements that all mattress sets must meet before they canbe commercialized. The purpose of this regulation is to reduce the number of fatalities and injuries caused by mattress fires. The maximum heating rate and total heating value must not exceed set values during a 30‐minute combustion test of the mattress.

Mattresswithout

FR CORONA

Mattress madefireproof byFR CORONA[Handling and cautions]•Reconfirm the performance, if using 100% FR CORONA or mixing with other materials. •It does not assure to protect the body from burn, etc. •Use the product only after understanding the intended use, conditions, and environment. •Store indoors at 40℃ or below, out of direct sunlight. There is a possibility of discoloration. •Do not use fire or strong oxidizing
agents in the vicinity of the storage area. •Do not handle the product in areas where exhaust gases (NOx, SOx, etc.) are generated. There is a possibility of discoloration.