From UL 94, car interiors, railway…to aircraft,
Sekisui’s flame retardance technology is constantly advancing.
Comparison of Performance in a U94 Flammability Test and
Test Setup Illustration
Solid Plastic Materials
For flame retardant performance in various applications,
there are different performance requirements depending on each standards and materials used, as well as the applications.
Today, materials used near people or objects are often required to be flame retardant or non-combustible.
The requests for flame retardance and non-combustible have given birth to unique flame retardance standards for specific purposes or markets.
For example, the UL standards, the product safety standards developed by Underwriters Laboratories Inc. contain UL94 regarding the measurement of the flammability of plastic,which is used as typical guidelines in most industries.
Flame Retardant of Softlon FR-ND
|Grade||Combustion Test Method|
|UL94 HF-1||FMVSS 302||Railway Vehicles|
|# 3004||◎||○||◎ Flame resistance|
|# 3005||◎||○||◎ Flame resistance|
◎: Certified; ○: Certified equivalent
Flame Retardant of Thermobreak
List of Corresponding Standards
|Regulation||Test Method||Measuring Thickness|
|EN 45545-2||Europe||ISO 5658 |
|ISO 5659 |
|Smoke density & |
|ISO 5660 |
|Heat Release Rate (Thermal conductivity)||25mm|
Part 6 & 7
|BS 6853 Annex B2|
|NFPA 130||U.S.||ASTM E162||ASTM E162|
|ASTM E662||ASTM E662|
|PRIIA||BBS 7239||BSS 7239|
Turning things from flammable to non-flammable:
Sekisui’s constantly improved foam has been chosen in many industries.
There are two methods for making plastic materials flame retardant:
(1) Choosing flame retardant resin and (2) Adding a substance that provides flame retardance
In the long history of Sekisui polyolefin foam, development has been continued with the intention of responding to the constantly growing needs for flame retardant materials.
The above efforts have produced our globally accepted flame retardant products that conform to various standards including UL 94, FMVSS 302 governing the materials for vehicle interiors, and the fire retardance standards for railway vehicles that differ from country to country.
Newly developed Softlon LHR satisfies the typical require standards for aircraft interiors.
|Required Performance||Test Method||Softlon LHR|
|Low heat generation||FAR25.853(d)App.FPart IV||Pass|
|Vertical combustion for 60 seconds||FAR25.853(a)App.FPart I||Pass|
|Vertical combustion for 12 seconds||FAR25.853(a)App.FPart I||Pass|
|Smoke density||FAR25.853(a)App.FPart V||Pass|
※below 9mm thikness
Challenge of developing products to reach aircraft standards:
Flame retardance is not enough. A new feature, low heat release foam has come into view.
In response to the growth of the global economy and population in developing countries, the number of aircraft in operation will continue to increase. In addition, aircraft are the fruit of a variety of advanced technologies, requiring ultimate performance from each piece of material.
Aircraft materials are controlled under strict standards against fire, smoke, and toxicity, which are collectively referred to as “FST performance.” Moreover, aircraft interiors require special properties, including low heat release during combustion.
With continued development toward satisfying these strict standards, Sekisui has succeeded in producing world’s highest level of low-heat release foam from polyolefin foam.
While seeking early applications of our products as shock absorbers and thermal insulators for the seats, walls and ceilings, and galleys in aircraft, we are also planning to building and construction fields.
SEKISUI CHEMICAL CO., LTD.
Foam Division High performance plastics company