UL94 flammability rating

Some UL94 flammability ratings are given by way of example in Table 5.15. 

Table 5.15 Some collected UL94 flammability ratings...

Good dimensional stability, partially as a consequence of the low water absorption but also because of a low coefficient of thermal expansion. Capability of compounding to give UL94 V-0 flammability ratings. 

It has been shown that the required loading levels of metal hydroxides to flame retard polyolefins can be reduced by the addition of transition metal oxides as synergistic agents. For example, a combination of 47.6% MH modified with nickel oxide in PP gave a UL94 V-0 flammability rating, which would require -55% of unmodified MH.4 These systems, however, can only be used where the color of the product is not important. 

The addition of very small amounts of fine carbon fibers73 or polyacrylonitrile fibers74 can reduce the level of inorganic hydroxide required to achieve UL94 V-0 flammability ratings in polyolefin compounds. These secondary additives are thought to function as char promoters. 

UL flammability rating Thermal expansion coefficient UL94 D696 1/°C V0(0.16) 5E-5 HB 4E-5 HB 4E-5... 

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