1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 746E Polymeric Materials Industrial Laminates, Filament Wound Tubing, Vulcanized Fibre, and Materials Used In Printed-Wiring Boards STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT AUTHORIZED
2、FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM ULUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL Standard for Safety for Polymeric Materials Industrial Laminates, Filament Wound Tubing, Vulcanized Fibre, and Materials Us
3、ed In Printed-Wiring Boards, UL 746E Sixth Edition, Dated August 5, 2016 Summary of Topics: This New Edition of ANSI/UL 746E includes the following changes in requirements: 1. Correction of Performance Prole Values in Table 7.1 2. Correction of a Value of Volume Resistivity for Type CEM-3 Material i
4、n Table 7.2 3. Clarication of Requirements in Paragraph 7.3 4. Consolidation of Requirements for Material Identication Test Methods in Section 7 5. Modication of Requirements in Figures 7.1 and 7.2 and Paragraph 8.7 6. Clarication of Requirements in Figure 7.1 7. Clarication of Requirements in Parag
5、raph 7.7.2 8. Revision of Paragraph 8.7 9. Correction of References to One-Point LTTA Programs in Paragraphs 8.10 and 8.11 10. Correction of Reference to ASTM Standard in Table 9.1 11. Clarication of Requirements for the Ultrathin Laminate Program in Paragraphs 10.1.4 and 10.1.6 12. Deletion of the
6、Requirement for Surface Resistivity Test Method for HDI Evaluation from Table 11.3 13. Change of References to Thermal Shock Throughout UL 746E to Thermal Stress 14. Change of References to Insulation Material Throughout UL 746E to Dielectric Material 15. Clarication of Requirements for Bond Strengt
7、h Pattern in Paragraph 17.3.3 16. Clarication of Requirements for Data Collection in Section 17.4 17. Addition of Requirements for Metal Base Laminate Evaluations with Build-Up Constructions to Paragraph 20.1.4 and Table 20.1 18. Revision of Metal Base Laminate Sample Requirements for Performance Ch
8、aracteristics in Table 20.1 19. Addition of Requirements for Metal Clad Metal Base Laminates in Section 20.4 AUGUST 5, 2016 UL 746E tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 20. Clarication of Requirements for the Permanent Coating
9、Evaluation and the Required Sample Numbers in Paragraphs 21.2.1 and 21.2.2 21. Clarication of Requirements for Conformal Coating Transient Testing in Section 22 22. Clarication of Marking Requirements in Section 23 The requirements are substantially in accordance with Proposal(s) on this subject dat
10、ed September 25, 2015 and January 15, 2016. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, or otherwise without prior permission of UL. UL provides this Standar
11、d as is without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or tness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of prots, lost sa
12、vings, loss of data, or any other damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall ULs liability for any damage ever exceed the price paid for this Standard, re
13、gardless of the form of the claim. Users of the electronic versions of ULs Standards for Safety agree to defend, indemnify, and hold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorneys fees) resulting from any error or deviation intro
14、duced while purchaser is storing an electronic Standard on the purchasers computer system. AUGUST 5, 2016 UL 746E tr2UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 5, 2016 1 UL 746E Standard for Polymeric Materials Industrial Laminat
15、es, Filament Wound Tubing, Vulcanized Fibre, and Materials Used In Printed-Wiring Boards First Edition November, 1985 Second Edition February, 1994 Third Edition June, 2000 Fourth Edition April, 2006 Fifth Edition April, 2010 Sixth Edition August 5, 2016 This ANSI/UL Standard for Safety consists of
16、the Sixth Edition. The most recent designation of ANSI/UL 746E as an American National Standard (ANSI) occurred on August 5, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages or Title Page. Any other portions of this ANSI/UL standard that were not processed in acc
17、ordance with ANSI/UL requirements are noted at the beginning of the impacted sections. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (C
18、SDS) at http:/. ULs Standards for Safety are copyrighted by UL. Neither a printed nor electronic copy of a Standard should be altered in any way. All of ULs Standards and all copyrights, ownerships, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 20
19、16 UNDERWRITERS LABORATORIES INC. ANSI/UL 746E-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL AUGUST 5, 2016 UL 746E 2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSIO
20、N FROM UL CONTENTS INTRODUCTION 1 Scope .6 2 Glossary .6 3 Units of Measurement 12 4 Measurement Accuracy and Testing Conditions .12 5 Supplementary Test Procedures .13 6 References 13 INDUSTRIAL LAMINATES 7 General .14 8 Abbreviated Test Program 27 9 Full Test Program 31 10 Ultrathin Laminate and P
21、repreg Test Program 37 10.1 General .37 10.2 UL/ANSI ultrathin laminates and prepreg 39 10.3 Non-UL/ANSI ultrathin laminate and prepreg test program .43 10.4 Intermixing of materials that are not generically identical 44 11 Dielectric Materials Intended For Use In Fabricating High Density Interconne
22、ct (HDI) Type Constructions 44 11.1 General .44 11.2 Thermal aging .45 11.3 Performance prole indexing 52 11.4 Metal clad test program .56 11.5 Test programs for revising dielectric material parameters 60 VULCANIZED FIBRE 12 General 62 13 Vulcanized Fibre Test Program .63 FILAMENT WOUND TUBING 14 Ge
23、neral .64 15 Filament Wound Tubing Test Program 65 METAL CLAD LAMINATES, METAL CLAD FLEXIBLE FILM, AND PREFABRICATED MULTILAYERED LAMINATES 16 General 66 17 Metal Clad Laminates .67 17.1 General .67 17.2 Single layer sample construction .69 17.3 Multi-layer sample construction 69 17.4 Data collectio
24、n .83 17.5 Microsection analysis .85 17.6 Thermal stress .87 17.7 Bond strength delamination and blistering test .88 17.8 Delamination and blistering 89 AUGUST 5, 2016 UL 746E 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 17.9 Dissimilar
25、dielectric materials thermal cycling test 89 17.10 Flammability test 90 17.11 Additional tests .91 18 Prefabricated Multilayered Laminates Mass Lamination 91 18.1 General .91 18.2 Product limitations 92 18.3 Test samples 92 18.4 Processes .92 19 Metal Clad Flexible Film 93 20 Metal-Based Laminates 9
26、3 20.1 General .93 20.2 Performance prole characteristics .93 20.3 Thermal aging .96 20.4 Metal clad metal base laminates .99 PERMANENT COATINGS 21 Permanent Coatings .100 21.1 General 100 21.2 Test samples .100 21.3 Thermal stress 101 21.4 Flammability test 101 22 Conformal Coatings 102 22.1 Genera
27、l 102 22.2 Test samples .103 22.3 Sample conditioning .106 22.4 Voltage transient test 109 22.5 Dielectric voltage-withstand and breakdown-voltage test .111 22.6 Abrasion resistance test .112 MARKING 23 Details .113 SUPPLEMENT SA - FOLLOW-UP INSPECTION SA.1 Scope .SA1 SA2 Glossary SA1 SA3 Responsibi
28、lity of the Manufacturer .SA2 SA4 Responsibility of the Field Representative SA3 SA5 Selection of Samples for Follow-Up Testing .SA3 SA6 Follow-Up Test Program SA4 APPENDIX A Typical IR Spectrums A1 General .A1 AUGUST 5, 2016 UL 746E 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION O
29、R DISTRIBUTION WITHOUT PERMISSION FROM UL APPENDIX B End-of-life Conditioning of Industrial Laminates B1 General .B1 AUGUST 5, 2016 UL 746E 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 These requirements cover te
30、st procedures to be used for the evaluation of industrial laminates, lament wound tubing, vulcanized bre, and materials for use in fabricating printed wiring boards. 1.2 These requirements provide data with respect to the physical, electrical, ammability, thermal, and other properties of the materia
31、ls, that are intended to provide guidance to the material manufacturer, the fabricator, the end product manufacturer, safety engineers and other interested parties. 2 Glossary 2.1 For the purpose of this standard the following denitions apply. 2.2 ADHESIVE A gelatinous substance such as glue or ceme
32、nt used to join, bond, or fasten materials or objects together. 2.3 ANISOTROPIC A material having different values for properties, such as conductivity, depending on the direction or dimension within the material. 2.4 AS RECEIVED Specimens or samples in an unconditioned state, prior to being subject
33、 to conditioning, or without a history of conditioning. 2.5 BASE MATERIAL An organic or inorganic insulating material used to support a pattern of conductor material. The base material may be rigid or exible. 2.6 BASE MATERIAL THICKNESS The thickness of the base dielectric material excluding conduct
34、ive foil or material deposited on the surface of the base material. If an adhesive is used to adhere the conductor material to the base material, the adhesive thickness and application surfaces (base material sides) are indicated separately. 2.7 BIAS CUT Samples cut crosswise to the surface of the m
35、aterial. See Figure 7.1. 2.8 BONDING LAYER An adhesive layer used to bond discrete layers of multilayer laminate constructions. Also known as prepreg. 2.9 BUILD-UP THICKNESS Overall thickness of a combination of materials. Unless otherwise indicated, the build-up thickness will refer to the overall
36、thickness of a laminate construction where no internal or external conductor material resides. 2.10 CAP LAYER A single sided copper clad laminate bonded to the external surface of the multilayer board with bonding layer material (prepreg or b-stage material). 2.11 CIRCUIT Electrical devices and elem
37、ents interconnected to perform a desired electrical function. AUGUST 5, 2016 UL 746E 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.12 CIRCUITRY LAYER Conductor layer or plane in or on a printed wiring board. 2.13 CLAD MATERIAL See Metal
38、 Clad Base Material. 2.14 COATING A non-metallic substance applied by some process, such as dipping, curtain coating, lm laminating, screening, spraying, or melt-ow. 2.15 CONDITIONING Exposure of test samples to an environment for a period of time, prior to or after testing and prior to evaluation.
39、2.16 CONDUCTIVE (ELECTRICAL) The ability of a substance or material to conduct electricity. 2.17 CONDUCTIVE FOIL A thin metal sheet intended for forming a conductor pattern on a base material. 2.18 CONDUCTOR A trace or path for electricity to transmit in a conductor pattern. 2.19 CONDUCTOR ADHESIVE
40、Adhesive material used to attach conductor material to a base material. 2.20 CONDUCTOR AVERAGE TRACE WIDTH The average width of a length of conductor trace. 2.21 CONDUCTOR BASE WIDTH The width of a conductor at the interface of the conductor material as determined by microsection analysis. This widt
41、h is used to determine bond strength/peel strength values. 2.22 CONDUCTOR LAYER A single plane of a conductor material or pattern on a base material. 2.23 CONDUCTOR MATERIAL An organic or inorganic substance capable of transmitting electricity, used for circuit conductors, including but not limited
42、to copper, tin, nickel, gold, carbon paste, copper paste, silver paste, ruthenium oxide paste, etc. 2.24 CONDUCTOR PATTERN The path, design, or conguration of conductor material on the base material, including but not limited to conductor traces, lands, through-holes, and vias. 2.25 CONDUCTOR THICKN
43、ESS The thickness of the conductor and additional metallic platings or coatings, excluding non-conductive coatings. 2.26 CONDUCTOR TRACE A linear conductor path of a conductor circuit. 2.27 CONDUCTOR WEIGHT See Conductor Thickness. 2.28 CONDUCTOR WIDTH The width of the conductor as viewed from a top
44、 view or at the plane of the surface of a base material, whichever is less. See Conductor Base Width. 2.29 CONFORMAL COATING A protective covering applied on a printed-wiring board capable of conforming to the conguration of objects coated, used to increase the dielectric voltage-withstand capabilit
45、y between conductors and/or to protect against environmental conditions. AUGUST 5, 2016 UL 746E 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 2.30 CONTINUITY An uninterrupted path for the ow of electrical current in a circuit. 2.31 CONSTR
46、UCTION A variation in laminate materials, including but not limited to base material, laminate, prepreg, dielectric materials, or other insulation materials. Variations include singlelayer, multilayer, and composite constructions. 2.32 CORE MATERIAL The innermost material or base material which may
47、be used to support a subsequent layer or layers of dielectric material and conductor pattern. Core material may be an organic or inorganic material, with or without integral dielectric material. Core material may be referred to as substrate material. 2.33 COUPON A test vehicle/specimen constructed t
48、o represent a production material to be used for testing. See Sample. 2.34 CURRENT The ow or movement of electrons in a conductor as a result of voltage difference between the ends of the conductive path. 2.35 DECLAD A dielectric material from which the foil or conductive material has been removed b
49、y etching or other means. 2.36 DELAMINATION A planar separation of materials (i.e., separation between conductor and base material, prepreg, dielectric material, etc.). 2.37 DESSICATOR A sealable vessel containing anhydrous calcium chloride, or other drying agent, maintained at a relative humidity not exceeding 20 percent at 23 2C. 2.38 DIELECTRIC A material capable of high resistance to the ow of electrical current and c
