UL 746A CRD-2014 UL Standard for Safety Polymeric Materials C Short Term Property Evaluations - Section Paragraph Reference Appendix A B and C Subject Conformance Criteria for IR .pdf

1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM ULUNDERWRITERS LABORATORIES INC. CERTIFICATION REQUIREMENT DECISIONThis Certification Requirement Decision is prepared and published by Underwriters Laboratories Inc.(UL). It is normative for the a

2、pplicable UL Product Certification Program(s); however, it is currently notpart of the UL Standard(s) referenced below.Product Category (CCN): QMFZ2/3/8/9, QMTR2/8, OCDT2/3/8/9 For SecondaryApplicable CCNs see AnnexStandard Number: UL 746AStandard Title: Standard for Polymeric Materials Short Term P

3、roperty EvaluationsEdition Date: September 6, 2012Edition Number: 6Section / Paragraph Reference: Appendix A, B and CSubject: Conformance Criteria for IR, TGA and DSCDECISION:Appendix AInfrared (IR) Analysis Conformance CriteriaA3 Spectral Discrepancies:(New) A3.2 A peak or transmittance “band” is o

4、bserved as a reproducible change in direction (relativeincrease in signal magnitude) of the absorbance (or %T) signal that reaches a maximum value inabsorbance (or %T) relative to a local baseline and then changes direction (relative decrease in signalmagnitude) to return to the underlying local bas

5、eline. This description includes distinct bands, and“shoulders” that do not return to a level baseline (slope = 0) due to obscuration by larger intensity bands.(New) A3.2.1 Total band intensity is measured as the corrected height (%T) or difference between theband nadir and the point on the band bas

6、eline drawn between the local maxima on either side of the nadirthat draws a perpendicular to that nadir. Noise can be measured in the region between 2050 and 1950wavenumbers or any other spectral region where the transmittance is steady and bands are not observed.(New) A3.2.2 When the compositional

7、 cause of the band in question is known to be related to any additiveindicated in the “Test considerations based upon compound variations” table in the Polymer variationssection of this standard, the total intensity (%T) of non-conforming bands shall be at least three times thehighest level of basel

8、ine noise of the spectrum under evaluation.(New) A3.2.3 When the compositional cause of the band in question is not known to be related to anyadditive indicated in “Test considerations based upon compound variations” table in the “Polymervariations” section of this standard, the total corrected heig

9、ht (%T) of non-conforming bands shall be |0.30| %T.A4 Exception Consideration:(New) A4.2 Exception consideration shall be given to spectral discrepancies determined to satisfy therequirements indicated in the “Test considerations based upon compound variations” table in the “Polymervariations” secti

10、on of this standard. For example, if it is determined that the spectral discrepancy is due toa change in catalyst additive (e.g. N,N-ethylenethiourea), the change is considered acceptable withouttesting per program code “O” of the Polymer variations table. Similarly, if it is determined that the spe

11、ctraldiscrepancy was due to a change in level of inorganic pigment (e.g. titanium dioxide) or lubricant additiveUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTION WITHOUT PERMISSION FROM UL(e.g. ethylene bis-stearamide) which was present at levels less than or equal to 5%

12、 the change isconsidered acceptable if the requirements of test program code “A” (flame, minimum thickness at all flameratings assigned to the original material formulation) are satisfied.APPENDIX BThermogravimetric Analysis (TGA) Conformance CriteriaB7 Exception Consideration:(New) B7.2 Exception

13、consideration shall be given to curve discrepancies determined to satisfy therequirements indicated in the “Test considerations based upon compound variations” table in the “Polymervariations” section of this standard. For example, if it is determined that the curve discrepancy is due toa change in

14、catalyst additive (e.g. N,N-ethylenethiourea), the change is considered acceptable withouttesting per program code “O” of the Polymer variations table. Similarly, if it is determined that the curvediscrepancy was due to a change in level of inorganic pigment (e.g. titanium dioxide) or lubricant addi

15、tive(e.g. ethylene bis-stearamide) which was present at levels less than or equal to 5%, the change isconsidered acceptable if the requirements of test program code “A” (flame, minimum thickness at all flameratings assigned to the original material formulation) are satisfied.APPENDIX CDifferential S

16、canning Calorimetry (DSC) Conformance CriteriaC2 Number and type of thermal events:(New See C2.3) D. Endothermic responses of |20| w shall not be cause for nonconformance. Theendothermic response is measured as the total height (heat flow measured as a deflection from baseline).This is calculated as

17、 the distance in microwatts from the peak nadir drawn perpendicularly to the heat flowaxis from the nadir to the baseline extension between the local maxima on either side of the nadir.C5 Exception Consideration:(New) C5.3 Exception consideration shall be given to curve discrepancies determined to s

18、atisfy therequirements indicated in the “Test considerations based upon compound variations” table in the “Polymervariations” section of this standard. For example, if it is determined that the curve discrepancy is due toa change in catalyst additive (e.g. N,N-ethylenethiourea), the change is consid

19、ered acceptable withouttesting per program code “O” of the Polymer variations table. Similarly, if it is determined that the curvediscrepancy was due to a change in level of inorganic pigment (e.g. titanium dioxide) or lubricant additive(e.g. ethylene bis-stearamide) which was present at levels less

20、 than or equal to 5%, the change isconsidered acceptable if the requirements of test program code “A” (flame, minimum thickness at all flameratings assigned to the original material formulation) are satisfied.RATIONALE FOR DECISION:Clarification of the existing conformance criteria to more accuratel

21、y reflect current practice and improveconsistency in the application of these criteria. The proposed revisions and their related clauses areshown below.1. IR (A4.2), TGA (B7.2) and DSC (C5.3): The proposed revisions in these sections referencethe “Test considerations based upon compound variations”

22、in the Polymer variations clause(9.9) and Table 9.1 of the standard. This revision more accurately reflects current practice inassessing IR, TGA and DSC test differences when comparing data sets.STANDARD NUMBER: UL 746A -2-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDISTRIBUTIO

23、N WITHOUT PERMISSION FROM UL2. IR (A3.2): The proposed revisions in this section establish minimum peak intensityrequirements for identifying spectral differences when the compositional cause is known orunknown. This revision provides improved consistency in assessing IR test differences inrelation

24、to the Polymer variations clause (9.9) and Table 9.1 of the standard when comparingdata sets.3. DSC (C2.3D): The proposed revisions in this section establish minimum endothermic peakresponse requirements for identifying curve differences. This revision provides improvedconsistency in assessing DSC t

25、est when comparing data sets.ANNEXAAAF; AAAH; AAAQ; AGNY; AGNY2; AGNY3; AGNY7; AGNY8; AHIV; AHIV2; AHIV3; AHIV7; AHIV8;AHIV9; AJIJ; ALKW; ALLU; ALLU2; ALNR; BHZF; BHZF3; BHZF7; BICW; BIDU2; BIHW; BIIH; BIYR;BJLZ; BKNV; BLBT; BLIS; BLME; BLPR; BMQX; BNEV; BNST; BOLT; BPHX; BPVV; BQJT; BQXR;BRGU; BSMV

26、 BTAT; BTOR; BUGV; BULR; BUPX; BUSA; BVDV; BVRT; BVYS; BWFR; BWSZ; BXGX;BXNW; BXUV; BXUV7; BYWR; CDWZ; CEYY; DGWU; DGWU2; DGWU3; DGWU7; DGXC; DGXC7;DGXO; DGXW; DGXW7; DGZE2; DGZE3; DGZE9; DGZZ; DGZZ3; DGZZ7; DLPV; DMLW; DMLW2;DMLW3; DMLW7; DMLW8; DMLW9; DQXV; DTOV; DTOV2; DTOV3; DUZX; DUZX7; DVCS;

27、DVYW;DWTT; DWTT2; DWTT3; DWTT7; DWTT8; DXHR; DXHR3; DXHR7; DXOQ; DXOQ3; DXOQ7; DYBY;DYIX; DYIX7; DZKT; DZKT7; DZYR; DZYR3; EAZX; ECBT2; ECBT3; ECBT8; ECBT9; ECCT2; EFNI;EFNI7; EFNIC; EKAT; EMRB; EOUV; FHIT; FHJR; FJMX; FJMX7; FKAV; FKAV7; FWBX; FWBX7;FWBXC; GBIX2; GOAS; GPWV; GPWV2; GPWV3; GPWV7; GP

28、WV8; GPWV9; GPWX; GPWX7; GVEV;GVWZ; HNHT; HNIR; HNIR7; IEUZ; IEUZ3; IEUZ7; IEUZ9; IKOZ; IKOZ3; IKOZ7; ILGJ; ILGJ2; ILGJ3;ILGJ7; IMSR; IMSR3; IMSR7; IMSR9; IOVT; IYNK; KCPU; KMIK; KNUR; KNUR3; KNUR7; KNUR9;METZ; METZ2; METZ3; METZ7; METZ8; METZC; MLKU; MLKU2; MLKU3; MLKU8; MLKU9; NKCR;NKCR2; NKCR3; N

29、KCR7; NKCR8; NKCR9; NXCS; OANZ; OANZ2; OANZ3; OBJT; OBJT2; OBJT3;OBJY2; OBJY3; OBJY8; OBJY9; OBMW; OBMW2; OBMW3; OBNT; OBNT2; OBOR; OBOR2; OBOR3;OERQ; OERU; OHZR; OPET; OPET2; OPET3; OPZY; OPZY3; OTAW; OTAW2; OWKZ; OWNJ; PAZQ;PHIX; PHIX2; PHIX3; PIDF; PIDF2; PIDF3; PIDF7; PIDF8; PIDF9; PJQU; QAWZ; Q

30、AYK; QAYK3;QAYK7; QAYK9; QAZM; QAZM7; QAZQ; QBAA; QBAA7; QBFN; QCIT; QCIT7; QCMZ; QCMZ2; QCMZ3;QCMZ7; QCMZ8; QCVZ; QERS; QGRW; QGRW7; QGVE; QGWS; QGWS2; QMJU; QMJU2; QMLJ2;QMMY2; QMQS2; QMRX2; QMSS2; QMSX2; QMTM; QMTM2; QMTM3; QMTN2 QMTO2; QMTS;QMTS2; QMTS3; QMTS8; QMTT; QMTT2; QMTT3; QNNP; QOJR; QO

31、QW2; QPTZ; QPTZ3; QQRK;QQRK7; QVEZ; REUZ; REUZ2; REUZ3; REUZ7; REUZ8; REUZ9; SLGV; TFXX; TGFU; UBJY2; UBJY3;UBJY8; UBJY9; UYMR; UYMR2; UYMR3; UYMR7; UYMR8; VAIU2; VBEW; VEVX; VEVX7; VGYZ;VGYZ7; VIHU; VIHU7; VIXR; VIXR7; VKKW; VKKW7; VNIV; VNIV2; VNIV3; VNIV7; VNIVC; VNWH;VNWH7; VQGU; VQGU2; VQGU7; V

32、UFZ; VUFZ7; VUFZC; VZCA; VZCA2; VZCA3; VZCA7; VZCA8;VZCA9; WDUT; WDUT2; WDUT3; WDUT7; WDUT8; XHBN; XHHW; XHJI; XHLP; XJYW; XJYW2;XJYW3; XJYW7; XJYW8; XJYW9; XKJU; XKJU2; XKJU3; XKJU7; XKJU8; XKJU9; YDPU2; YDPU3;YDPU8; YDRQ2; YDRQ3; YIIQ; YIOZ; YSYI2; ZCTT; ZCTT2; ZCTT3; ZCTT7; ZCTT8; ZDPA; ZDTCC;ZJC

33、Z; ZJCZ3; ZJCZ7; ZJCZ9; ZMOW; ZMOW7; ZMVV; ZMVV2; ZMVV3; ZMVV7; ZMVV8; ZMVV9;ZOKZ; ZOKZ7; ZPMV; ZPMV2; ZPMV3; ZPMV8; ZPMV9; ZPXK; ZPXK2; ZPXK3Copyright 2014 Underwriters Laboratories Inc.UL, in performing its functions in accordance with its objectives, does not guarantee or warrant thecorrectness o

34、f Certification Requirement Decisions it may issue or that they will be recognized or adoptedby anyone. Certification Requirement Decisions are the opinion of Underwriters Laboratories Inc. inpractically applying the requirements of the standard. They do not represent formal interpretations of thest

35、andard under American National Standards Institute (ANSI) processes. UL shall not be responsible toanyone for the use of or reliance upon Certification Requirement Decisions by anyone. UL shall not incurSTANDARD NUMBER: UL 746A -3-UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION ORDIS

36、TRIBUTION WITHOUT PERMISSION FROM ULany obligation or liability for damages, including consequential damages, arising out of or in connectionwith the use or reliance upon Certification Requirement Decisions. The electronic version of theCertification Requirement Decision is the current version and previously printed copies may be outdated.This document is published as a service to ULs certification customersSTANDARD NUMBER: UL 746A -4-