UL94标准介绍UL94

Procedure 程序
1.   Three specimens of each thickness are tested after conditioning for 48 hours at 23 degrees C and 50% RH.
每一种厚度准备了三个试片，测试前先在23℃和50%相对湿度下放置48小时。
2.   Each specimen is mounted with its long axis horizontal and its short axis at a 45 degree angle.
每一试片以长轴呈水平、短轴呈45°方式固定。
3.   Each specimen is marked with two lines, 25 mm and 100 mm from one end of the specimen.
每一试片在25mm及100mm处画线做记号。
4.   Each specimen is supported at one end such that its lower edge is 10 mm above a piece of wire gauze.
每一试片之一端固定，低缘下方10mm处水平放置一片金属细网。
5.   A 20 mm high blue Bunsen burner flame is applied to the free end of the specimen for 30 second and then removed. If the specimen continues to burn after the removal of the test flame, the time for the flame front to travel between the two gauge marks is measured and the burning rate calculated in millimeters per minute.
一个20mm高蓝色本生灯火焰燃烧试片未固定之一端30秒钟然后移开。 在火焰移开后假如试片继续燃烧，则测出火焰由前缘燃烧至2个记号之间所用的时间。 燃烧速率以mm/min计算。
Requirements for HB HB等级的判定标准
6.   The specimens may not have a burn rate exceeding 40 mm per minute over a 75 mm span for specimens having a thickness of 3.0 mm to 13 mm, or
3.0mm到13mm厚度之试片，没有一个在75mn距离内燃烧速率超过40mm/min或
7.   The specimens may not have a burn rate exceeding 75 mm per minute over a 75 mm span for specimens having a thickness less than 3.0 mm, or
小于3mm厚度之试片，没有一个在75mm距离内燃烧速率超过75mm/min或
8.   The specimens cease to burn before the flame reaches the 100 mm mark.
火焰在接近100mm记号前中止燃烧。
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UL 94 V-0, V-1, V-2 flammability standard(UL94 V-0, V-1, V-2可燃性标准)
Specimen 试片
Length 125 mm (5 in) x Width 13 mm (0.5 in) x Thickness [typically 0.7 mm (1/32 in) or 1.5 mm (1/16 in) or 3.0 mm (1/8 in)].
长125mm(5")X宽13mm(1/2")X厚度[一般为0.7mm(1/32")、1.5mm(1/16")、3mm(1/8")厚]
Procedure 程序
1.   A total of 10 specimens (2 sets) are tested per thickness.
每一厚度总共10个试片(分为两组)被测试。
2.   Five specimens of each thickness are tested after conditioning for 48 hours at 23 degrees C and 50% RH.
每一厚度取5个试片为一组在23℃和50%下放置48小时后再测试。
3.   Five specimens of each thickness are tested after conditioning for 7 days at 70 degrees C.
同一厚度另取5个试片为一组在70℃下放置7天后再测试。
4.   Each specimen is mounted with long axis vertical
每一试片以长轴垂直地面方式固定。
5.   Each specimen is supported such that its lower end is 10 mm above Bunsen burner tube.
试片上端被支撑以致下端高于本生灯10mm。
6.   A blue 20 mm high flame is applied to the center of the lower edge of the specimen for 10 seconds and removed. If burning ceases within 30 seconds, the flame is reapplied for an additional 10 seconds. If the specimen drips, particles are allowed to fall onto a layer of dry absorbent surgical cotton placed 300 mm below the specimen.
蓝色20mm高火焰燃烧试片下端边缘中心10秒钟，然后移开。 假如试片在30秒之内停止燃烧，则本生灯火焰再次燃烧试片下端边缘中心10秒钟。假如试片熔化，则滴下来的火焰分子会掉落在距试片下端300mm处之棉花层。
Requirements for V-0 (V-0的要求条件)
7.   The specimens may not burn with flaming combustion for more than 10 seconds after either application of the test flame.
在每一次本生灯火焰燃烧10秒钟移开后，没有任何一个试片被火焰点燃超过10秒钟。
8.   The total flaming combustion time may not exceed 50 seconds for the 10 flame applications for each set of 5 specimens.
每一组的5个试片中，共10次火焰燃烧10秒钟移开后，总共火焰燃烧的时间不超过50秒钟。
9.   The specimens may not burn with flaming or glowing combustion up to the holding clamp.
没有任何试片被火焰点燃并燃烧到试片被夹住固定的上端。
10.   The specimens may not drip flaming particles that ignite the dry absorbent surgical cotton located 300 mm below the test specimen.
没有任何试片滴落的火焰分子会点燃300mm下之乾燥的吸收性外科用棉花。
11.   The specimens may not have glowing combustion that persists for more than 30 seconds after the second removal of the test flame.
没有任何试片在第二次测试火焰移开后燃烧持续超过30秒钟。
Requirements for V-1 (V-1的要求条件)
12.   The specimens may not burn with flaming combustion for more than 30 seconds after either application of the test flame.
在每一次本生灯火焰燃烧10秒钟移开后，没有任何一个试片被火焰点燃超过30秒钟。
13.   The total flaming combustion time may not exceed 250 seconds for the 10 flame applications for each set of 5 specimens.
每一组的5个试片中，共10次火焰燃烧10秒钟移开后，总共火焰燃烧时间不超过250秒钟。
14.   The specimens may not burn with flaming or glowing combustion up to the holding clamp.
没有任何试片被火焰点燃并燃烧到试片被夹住固定的上端。
15.   The specimens may not drip flaming particles that ignite the dry absorbent surgical cotton located 300 mm below the test specimen.
没有任何试片滴落的火焰分子会点燃300mm下之乾燥的吸收性外科用棉花。
16.   The specimens may not have glowing combustion that persists for more than 60 seconds after the second removal of the test flame.
没有任何试片在第二次测试火焰移开后燃烧持续超过60秒钟。
Requirements for V-2 (V-2的要求条件)
17.   The specimens may not burn with flaming combustion for more than 30 seconds after either application of the test flame.
在每一次本生灯火焰燃烧1 0秒钟移开后没有任何一个试片被火焰点燃超过30秒钟。
18.   The total flaming combustion time may not exceed 250 seconds for the 10 flame applications for each set of 5 specimens.
每一组的5个试片中，若10次火焰燃烧10秒钟移开后，总共火焰燃烧不超过250秒钟。
19.   The specimens may not burn with flaming or glowing combustion up to the holding clamp.
没有任何试片被火焰点燃并燃烧到试片被夹住固定的上端。
20.   The specimens can drip flaming particles that ignite the dry absorbent surgical cotton located 300 mm below the test specimen.
试片滴落的火焰分子会有短暂的燃烧，且会点燃300mm之下的乾燥的吸收性外科用棉花层。
21.   The specimens may not have glowing combustion that persists for more than 60 seconds after the second removal of the test flame.
没有任何试片在第二次测试火焰移开后燃烧持续超过60秒钟。
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UL94 5VA & 5VB flammability standard (UL94 5VA & 5VB可燃性标准)
Specimens 试片
Bars: Length 125 mm (5 in) x Width 13 mm (0.5 in) x Thickness [typically 3.0 mm (1/8 in)].
试片：长125mm(5")X宽13mm(0.5")X厚度[一般为3mm(1/8")]
Plaques: Length 150 mm (6 in) x 150 mm (6 in) x Thickness [typically 3.0 mm (1/8 in)].
试板：150mm(6")Xl50mm(6")X厚度[一般为3mm(1/8")]
Procedure for Bars 程序试片
1.   A total of 10 specimens (2 sets) are tested per thickness.
每一厚度总共10个试片(分为两组)被测试。
2.   Five specimens of each thickness are tested after conditioning for 48 hours at 23 degrees C and 50% RH.
每一厚度取5个试片为一组在23℃，50%RH下放置48小时后再测试。
3.   Five specimens of each thickness are tested after conditioning for 7 days at 70 degrees C.
同一厚度另取5个试片为一组在70℃下放置7天后再测试。
4.   For bar specimens, the specimens are mounted with the long axis vertical.
测试棒试片以长轴垂直地面方式固定。
5.   A 125 mm overall high Bunsen burner flame with a 40 mm blue inner cone is applied to the lower corner of each specimen at an angle of 20 degrees from vertical such that the tip of the blue inner cone touches the specimen. The flame is applied for 5 seconds and removed for 5 seconds. The operation is to be repeated until each specimen has been subjected to 5 applications of the test flame.
一个高度40mm中心是蓝色的火焰总长125mm高的本生灯，放置方式与垂直方向呈20°角，并使蓝色火焰的顶端接触前试片的底端。 燃烧试片底端5秒钟后再移开火焰5秒钟。 如此操作重复5次。
Procedure for Plaques 试板的测试程序
o   Same as for bars except that the plaques are to be mounted on the horizontal plane with the flame applied to the center of the bottom surface of the plaque.
除了试板以水平方式放置以外，其测试程序都与测试片之程序相同。火焰燃烧试板之底面。
Requirements for 5VA (5VA的要求求条件)
7.   The specimens may not burn with flaming or glowing combustion for more than 60 seconds after the fifth application of the test flame.
在第5次的火焰燃烧5秒钟之后，没有任何一片试片被点燃或持续燃烧超过60秒。
8.   The specimens may not drip flaming particles that ignite the dry absorbent surgical cotton located 300 mm below the test specimen.
没有任何试片滴落之火焰分子会点燃放置于下面300mm(12")之乾燥吸收性外科用棉花层。
9.   Plaque specimens may not exhibit burnthrough.
没有任何一片试板被火焰穿透。
Requirements for 5VB (5VB的要求求条件)
10.   The specimens may not burn with flaming or glowing combustion for more than 60 seconds after the fifth application of the test flame.
在第5次的火焰燃烧5秒钟之后，没有任何一片试片被点燃或持续燃烧超过60秒。
11.   The specimens may not drip flaming particles that ignite the dry absorbent surgical cotton located 300 mm below the test specimen.
没有任何试片滴落之火焰分子会点燃放置于下面300mm(12")之乾燥吸收性外科用棉花层。
12.   Plaque specimens may not exhibit burnthrough.
没有任何一片试板被火焰穿透。
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UL 94 criteria summary(UL94判定标准摘要)
Criteria 判定标准   HB   V-2   V-1   V-0   5VB   5VA
Number of bar specimens as received
试样数目   3   5   5   5   5   5
Number of plaque specimens as received
试板数目                     3   3
Number of ignitions
火焰燃烧次数   1   2   2   2   5   5
Maximum flaming time per specimen per flame application, sec
每次火焰燃烧后每一试片的燃烧秒数不能超过       30   30   10      
Maximum total flaming time, 5 specimens, 2 ignitions, sec
5个试片，两次火焰燃烧的试片总燃烧秒数不能超过       250   250   50      
Specimen drips, ignites cotton
滴落的火焰分子是否会点燃下方的棉花层       Yes   No   No   No   No
Maximum afterglow time, per specimen, sec
每一试片最长的延烧秒数不能超过       60   60   30      
Burn to holding clamp
火焰是否燃烧到被夹子固定之上端       NO   NO   NO   NO   NO
Maximum flaming or glowing combustion time after 5th flame application, sec
第5次火焰燃烧后试片延烧秒数不能超过                   60   60
Maximum burning rate for specimens 3.0 mm to 13 mm thick over 75 mm span, mm/min3.0-13mm(0.12-0.50＂)
厚度之试片在75mm内之燃烧速率(mm/min)   40                  
Maximum burning rate for specimens less than 3.0 mm thick over 75 mm span, mm/min 小于3.0mm(0.12＂)
厚度之试片在75mm距离内之燃烧速率(mm/min)   75                  
Plaque specimen exhibit burnthrough
试板是否被火焰穿透                   Yes   No

测试项太多了，要求高。