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Equipment and appliance parts plastic materials burning test, with standard name, scope of application, classification, related standards, etc.

UL94

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Equipment and appliance parts plastic materials burning test, with standard name, scope of application, classification, related standards, etc.

UL 94: Test for Flammability of Plastic Materials for Parts in Devices and Appliances

This standard applies to the flammability test of plastic parts of equipment and electrical appliances

-The final qualification of a material depends on its use in the overall equipment and is consistent with the standards applicable to the equipment

-This standard can be used for other non-metal materials; but not for building materials and decorative plastic materials

-The methods described in this standard include standard-size samples and are used only to measure and describe the flammability of materials used in equipment and appliances relative to heat and flame in a controlled laboratory environment

UL94 total 12 fire rating:

HB, V-0, V-1, V-2, 5VA, 5VB, VTM-0, VTM-1, VTM-2, HBF, HF1, HF2.

Among them VTM-0, VTM-1, VTM-2 are suitable for plastic film,

HBF, HF1, HF2 are suitable for foamed materials

The level test plan is as follows:

1) HB level: Horizontal Burning Test

2) V0V2: Vertical Burning Test

3) 5VA / 5VB: 5V fire test 500w (125 mm) Vertical Burning Test

4) RP Class: Radiant Panel Flame Spread Test

5) VTM0-VTM2: Thin Material Vertical Burning Test

6) HF1-HF2: Horizontal Burning Foamed Material Test

-ASTM D 618: Test Method for Testing Plastics and Insulating Materials

-ASTM D 789: Method for judging the relative viscosity, melting point, and water content of PA

-ASTM E 162: Judging the Surface Combustion Performance of Materials Using a Radiant Heat Source

ASTM E 437: Specification for Industrial Wire Cloth and Screen (Square Hole Series)

-ASTM D 3195: Standard Specification for Rotameter Calibration

-ASTM D 5025: Standard for Laboratory Burners for Small Flammability Tests of Plastics

-ASTM D 5207: Small Burning Test on Plastic Materials

UL94 HB: Horizontal combustion

This plastic can burn slowly but cannot self-extinguish. This type is the lowest level of UL. This method is often used when vertical V0, V1, or V2 is not feasible.

UL94 V0, V1, V2, 5V: vertical combustion

UL94 V0 evaluation method: After the flame is removed after ignition, the sample can quickly self-extinguish to a non-burning melt dripping within 10s (that is, the burning melt drips one foot below the test sample). Cotton pads cannot ignite cotton).

The UL94 V1 evaluation method is similar to V0, except that it requires a longer self-extinguishing time. This test allows the melt to drip on the cotton pad, but does not ignite the cotton.

UL94 V2 is the same as V1, except that it allows burning droplets to ignite cotton below a foot.

UL94 5V is the most stringent test method, which involves the actual life of plastic products in flames. The experiment requires a flame length of 5 in. Five firings are applied to the test sample. No droplets are allowed to drip during the test, no obvious distortion of the test sample is allowed, and no holes are burned.