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Suitability for thermoplastic materials to be in direct support of live parts, below are the suitable properties for each flammability, Per UL 746C, Table 8.1
8 p4 N; `( @2 `! n8 i- C可以用来直接支撑带电体的塑料其HAI/HWI/CTI的指数需符合下表。
' ]+ |; U# U4 C" k+ C V-0 V-1 V-2 HB$ o) p2 \: ]: I+ F' y
HAI 3 2 2 1: i) N$ E8 ]" ?; c4 N# w
HWI 4 3 2 2
- O. ^) G7 v1 J* CCTI 4 4 4 4
& R! T5 `, R* a! Q
0 X% a |% x! _6 P& {0 K: S( sSuitability for thermoplastic materials to be in direct support of live parts, below are the suitable properties for each flammability, Per UL 746C, Table 8.15 c; m' l0 q6 ^1 @
可以用来直接支撑带电体的塑料料其HAI/HWI/CTI的指数需符合下表。
; R6 v c5 d2 @7 c. @6 R5 [1 ]$ ]6 n) h" y3 a& _
V-0 V-1 V-2 HB) \) P+ C( K5 O4 t: S
HAI 3 2 2 1
% u# I2 }/ y2 w+ o& Z) F' U5 zHWI 4 3 2 2* @9 D* L. _0 E1 U* v4 Q
CTI 4 4 4 4
" Q- t$ ]! h4 n( ]' _4 o, l数字越小,代表HAI/HWI/CTI的性质越好。
* E. { A6 K) L/ r6 p0 H) x& J例如:奇美PA-766 UL黄卡摘录) x H4 m# _2 D; j- ~0 D- r: }
H D 9 `( ~! H& [( g6 i3 N! n
Min. H H R T I V 4 C
. ^5 v0 r; n) [& a) q Thk Flame W A Elec Mech T 9 T
$ W1 l* M+ {, `% GMaterial Dsg Color mm Class I I Imp Str R 5 I
# q! M" i W- @PA-766 ALL 1.5 V-0 1 0 60 60 60 0 7 2. ~6 s, s: a& M8 O
2.5 5VA - - 60 60 60
% U3 O& g: ?, O 3.0 5VA 0 0 60 60 60 ) O/ K& t( P" I3 P, E
在最小厚度大于1.5mm时,其耐燃等级是UL 94V-0, HWI=1、HAI=0、CTI=2,因此看回上表HWI<4、HAI<3、CTI<4,符合上表,所以PA-766在最小厚度大于1.5mm时可以直接支撑带电体。0 U' ~/ d5 Z! Z7 O
但若黄卡中HAI、HWI值为 “-“,则代表厂商申请此料时未做相关测试,所以是不能认可为可直接接触带电体的。- h" ? U4 J% H# P& H
Hot-Wire Ignition (HWI; ASTM D3874, IEC 60695-2-20 ) — Performance is expressed as the mean number of seconds needed to either ignite standard specimens or to burn through the specimens without ignition. ( Q" d0 G2 O; k. a) z
HWI Range' P, N0 _9 r( \" e. d4 F
Mean Ignition Time (in sec) Assigned- w2 U' {, U5 s9 l3 C) u
PLC6 B$ o* S8 V! {7 }6 d
120 and longer 0
- l) T8 B/ ?* {* j/ R! I' d60 through 119 16 C7 S9 F7 N/ l+ Z. ~
30 through 59 2
$ K9 `4 i" D- s& w4 d% g15 through 29 3
0 H6 `- N+ x7 d( V9 K7 through 14 4. X& d, b6 s$ }/ b' z; A
Less than 7 5% z3 g' W6 u# H, s9 Y
High Current Arc Ignition (HAI; ANSI/UL 746A ) — Performance is expressed as the number of arc rupture exposures (standardized as to electrode type and shape and electric circuit) that are necessary to ignite a material when they are applied at a standard rate on the surface of the material." S% `3 z' }- E% N1 E+ v! }
HAI Range & S# T5 }5 i2 `8 A/ t- n7 [
Mean Number of Arcs 7 {$ R: r, ~. z' P m! p+ d2 w$ w
to Cause Ignition Assigned 7 f+ k9 h0 z" I7 \
PLC
! w5 a$ f* z9 X# |6 T% k# g; `4 o, s120 and greater 0
+ W$ {7 S4 C) k+ S# i) j60 through 119 13 s6 X* q/ N. c2 G9 Y* A) i$ O
30 through 59 2, w, I! E& f9 V8 p
15 through 29 31 t0 F2 `% n' A
Less than 15 4
) P6 b t: x, i6 n* pComparative Tracking Index (CTI; ASTM D3638 ) — Expressed as that voltage which causes tracking after 50 drops of 0.1 percent ammonium chloride solution have fallen on the material. The results of testing the nominal 3 mm thickness are considered representative of the material's performance in any thickness.
/ X0 A7 m: W# GCTI Range G' ~2 n; }3 A9 u
Tracking Index$ A, N" V0 |: w
(in volts) ! K; ?2 w( L ~
Assigned
8 Q3 n$ p; s$ M) zPLC
& s" z6 Q7 F) {600 and greater 0! p. D9 _ K9 a' z$ @ E) I
400 through 599 11 K* p3 t( R! _; F' F
250 through 399 2: ?+ c% l5 P0 U- _% `% _$ D
175 through 249 35 w' o" X+ @- d2 h5 Z; {$ n; }
100 through 174 47 D3 F. v9 W7 [- d% L5 a
Less than 100 53 ^8 c: O6 y3 t' T/ [
) V, ?5 V( y# p1 i
黄卡的说明COLUMN HEADING ABBREVIATIONS! X0 |2 ~& j: V" A8 y7 w7 F8 }
The following abbreviations may be used in the column headings in the individual Recognitions:7 B& k, Y9 Z* |& j& H3 |
Abbreviation Term
( p6 E: a: e6 q; l0 \3 `* HFlame Class ANSI/UL 94 Flammability Classification% \: t! B! ]+ ?
Material Dsg Material Designation; m* e- X: F& ?( U3 K1 g- m1 f
Col Color/ t) {! I" e; A7 o
Min Thk Minimum Thickness
: ?) y9 {# } G' f3 @Thk Rg Thickness Range
; e" L" J$ A& h: ]6 F! rDen Range g/cc Density Range, g/cc
: g5 {" m/ a Z: G P8 F# @; j) X1 yElec Electrical
2 N2 ]( [& T8 W) Q& Z7 zRP Radiant Panel
- {1 X' a0 J5 i0 O4 FRTI Relative Temperature Index! P2 X \5 j% {0 P6 t6 @
HWI Hot-Wire Ignition
3 A/ L/ h' A" v9 M/ o rHAI High Current Arc Ignition: _* @9 t+ C; C; `& t: l7 K2 ?
HVTR High Voltage Arc Tracking Rate0 e: y a8 }6 U6 q7 F0 j ~
D495 Arc Resistance
* f* y0 X8 @: [CTI Comparative Tracking Index) m- o/ D. n6 G) e& S
Mech Mechanical
. m8 Q W4 p9 S) m `/ KTnsl Tensile
( m( r$ h+ A, G6 N$ _Elong Elongation1 U/ |+ s4 j# M" u5 z7 o
Str Strength
, f' u' B4 d) V! u* U7 C$ FImp Impact |
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