1、UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL UL 746F Polymeric Materials Flexible Dielectric Film Materials for Use in Printed-Wiring Boards and Flexible Materials Interconnect Constructions STANDARD FOR SAFETYUL COPYRIGHTED MATERIAL NOT
2、AUTHORIZED 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 Flexible Dielectric Film Materials for Use in Printed-Wiring Boards
3、and Flexible Materials Interconnect Constructions, UL 746F Second Edition, Dated January 13, 2012 SUMMARY OF TOPICS This revision of UL 746F was issued to incorporate the following changes: 1. Addition of Requirements for an Alternate Condition for Flammability Samples as New Paragraphs 4.3 and 4.4
4、2. Addition of References to Section 7 and Table 7.1 of UL 746B, and to Section 8 of UL 746F, to Paragraph 8.1.1 3. Addition of Requirements to Clarify the Required Samples for IR Testing of Non- Homogenous Films to Table 8.2 4. Addition of Requirements for Sample Thickness Tolerance to a New Table
5、8.7 5. Replacement of References to Thermal Shock with References to Thermal Stress Throughout UL 746F 6. Deletion of the Reference to Coverlay Test from Paragraph 12.3.2 The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated December 4, 2015. Text th
6、at has been changed in any manner or impacted by ULs electronic publishing system is marked with a vertical line in the margin. 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 photocopyi
7、ng, recording, or otherwise without prior permission of UL. UL provides this Standard 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, inci
8、dental, consequential, indirect or similar damages, including loss of prots, lost savings, 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
9、 shall ULs liability for any damage ever exceed the price paid for this Standard, regardless 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 judgme
10、nt (including reasonable attorneys fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchasers computer system. FEBRUARY 22, 2016 UL 746F tr1UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSI
11、ON FROM UL FEBRUARY 22, 2016 UL 746F tr2 No Text on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL JANUARY 13, 2012 (Title Page Reprinted: February 22, 2016) 1 UL 746F Standard for Polymeric Materials Flexible Dielectric Film Mater
12、ials for Use in Printed-Wiring Boards and Flexible Materials Interconnect Constructions First Edition May, 2006 Second Edition January 13, 2012 This ANSI/UL Standard for Safety consists of the Second Edition including revisions through February 22, 2016. The most recent designation of ANSI/UL 746F a
13、s an American National Standard (ANSI) occurred on February 22, 2016. ANSI approval for a standard does not include the Cover Page, Transmittal Pages, Title Page, or effective date information. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Propos
14、als should be submitted via a Proposal Request in ULs On-Line Collaborative Standards Development System (CSDS) 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, owners
15、hips, and rights regarding those Standards shall remain the sole and exclusive property of UL. COPYRIGHT 2016 UNDERWRITERS LABORATORIES INC. ANSI/UL 746F-2016UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL FEBRUARY 22, 2016 UL 746F 2 No Text
16、 on This PageUL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL CONTENTS INTRODUCTION 1 Scope .5 2 Abbreviations .5 3 Units of Measurement .5 4 Measurement Accuracy and Testing Conditions 6 5 References .6 6 Supplementary Test Procedures 7 7 Gl
17、ossary .7 CONSTRUCTION 8 Flexible Dielectric Material Test Programs and Sample Requirements 13 8.1 General 13 8.2 Direct support requirements (DSR) 22 8.3 Polyimide ANSI-like program 23 8.4 Base materials (Dielectric lm material) 23 8.5 Conductor adhesives and conductors 26 8.6 Bonding lm (supported
18、 and unsupported) and internal bonding materials 28 8.7 Coverlay (coverlayer, coverlm and covercoat) 32 8.8 Flexible material combinations and exible mass laminate 34 PERFORMANCE 9 Short Term Performance Prole Tests 37 10 Long Term Thermal Aging Tests 37 11 Flammability Tests 37 12 Thermal Stress Te
19、st 38 12.1 Purpose .38 12.2 Compliance criteria .38 12.3 Test specimens 38 12.4 Test apparatus and material .38 12.5 Procedure .39 12.6 Data collection .40 13 Delamination Test 40 13.1 Purpose .40 13.2 Compliance criteria .41 13.3 Test specimens 41 13.4 Apparatus or material .42 13.5 Procedure .42 1
20、3.6 Data collection .44 14 Bond Strength Test .44 14.1 Purpose .44 14.2 Compliance criteria .45 14.3 Test samples 45 14.4 Apparatus or material .46 14.5 Procedure .46 14.6 Data collection .49 15 Ambient-bend Test 50 15.1 Purpose .50 FEBRUARY 22, 2016 UL 746F 3UL COPYRIGHTED MATERIAL NOT AUTHORIZED F
21、OR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 15.2 Compliance criteria .50 15.3 Test specimens 50 15.4 Apparatus or material .52 15.5 Procedure .52 15.6 Data collection .54 16 Cold-Bend Test .54 16.1 Purpose .54 16.2 Compliance criteria .55 16.3 Test specimens 55 16.4 Apparatus
22、or material .55 16.5 Procedure .55 16.6 Data collection .57 17 Repeated Flexing Test 57 17.1 Purpose .57 17.2 Compliance criteria .58 17.3 Test specimens 58 17.4 Apparatus or material .59 17.5 Procedure .60 17.6 Data collection .62 18 Coverlay Lamination Test 62 18.1 Purpose .62 18.2 Compliance crit
23、eria .63 18.3 Test samples 63 18.4 Apparatus or material .63 18.5 Procedure .64 18.6 Data collection .65 MARKINGS 19 Details .65 SUPPLEMENT SA - FOLLOW-UP INSPECTION SA1 Scope SA1 SA2 Glossary SA1 SA3 Responsibility of the Manufacturer .SA2 SA4 Responsibility of the Field Representative SA3 SA5 Sele
24、ction of Samples for Follow-Up Testing .SA3 SA6 Follow-Up Test Program SA4 FEBRUARY 22, 2016 UL 746F 4UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL INTRODUCTION 1 Scope 1.1 Flexible materials shall be dened as lms or materials exhibiting e
25、xible properties. 1.2 These requirements cover short term and long term test procedures to be used for the evaluation of exible material, lm, base material, conductor adhesive material, bonding lm, cover lay, and other thin lm materials used for parts intended for specic applications in end products
26、. 1.3 Together with the Standards mentioned in the Supplementary Test Procedures, Section 6, these requirements provide data with respect to the physical, electrical, ammability, thermal, and other properties of the materials under consideration and are intended to provide guidance to the material m
27、anufacturer, the fabricator, the end product manufacturer, safety engineers and other interested parties. 1.4 Compliance with these requirements does not indicate the product is acceptable for use as a component of an end product without further evaluation. 1.5 These requirements do not apply to the
28、 evaluation of rigid industrial laminates having a thickness greater than 0.25 mm (0.010 inch). For materials with thicknesses greater than 0.25 mm refer to the Standard for Polymeric Materials Industrial Laminates, Filament Wound Tubing, Vulcanized Fibre, and Materials Used in Printed Wiring Boards
29、, UL 746E. 2 Abbreviations 2.1 The acronym FMIC appears throughout this Standard, and stands for Flexible Materials Interconnect Construction. See 7.54 for the denition of FMIC. 2.2 The acronym MOT appears throughout this Standard, and stands for Maximum Operating Temperature. See 7.56 for the denit
30、ion of MOT. 2.3 The acronym RTI appears throughout this Standard, and stands for Relative Thermal Index. See 7.77 for the denition of RTI. 3 Units of Measurement 3.1 Values stated without parentheses are the requirement. Values in parentheses are explanatory or approximate information. JANUARY 13, 2
31、012 UL 746F 5UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 4 Measurement Accuracy and Testing Conditions 4.1 A measuring device used to perform the tests required by this Standard shall be capable of measuring the specied parameter with an
32、 accuracy within 10 percent of the measured parameter. 4.2 Unless otherwise specied in the individual test method, the standard atmospheric conditions surrounding the specimen prior to and during the test shall be between 15C and 35C (59F and 95F) and 45 percent and 75 percent relative humidity . 4.
33、3 Flammability samples shall be preconditioned as described in the Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94, or shall be preconditioned using the alternate conditions of 125 2C for 24 1 hours instead of 70 2C for 168 hours, unless otherwise
34、specied. 4.4 Once samples are removed from the thermal or humidity pre-conditioning environment, specimens shall be cooled in the desiccator for at least 4 hours at room temperature and tested within 30 minutes after removal from the desiccator. 5 References 5.1 Any undated reference to a code or st
35、andard appearing in the requirements of this standard shall be interpreted as referring to the latest edition of that code or standard. 5.2 The following is a list of ASTM test procedures referenced in this Standard. a) ASTM D 149 Standard Test Method for Dielectric Breakdown Voltage and Dielectric
36、Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies. b) ASTM D 257 Standard Test Methods for D-C Resistance or Conductance of Insulating Materials. c) ASTM D 348 Standard Test Methods for Rigid Tubes Used for Electrical Insulation. d) ASTM D 495 Standard Test Method for
37、 High-Voltage, Low-Current, Dry Arc Resistance of Solid Electrical Insulation. e) ASTM D 570 Standard Test Method for Water Absorption of Plastics. f) ASTM D 619 Standard Test Methods for Vulcanized Fibre Used for Electrical Insulation. g) ASTM D 882 Standard Test Method for Tensile Properties of Th
38、in Plastic Sheeting. h) ASTM D 1224 Standard Test Methods for Zinc and Cadmium in Paper. i) ASTM D 3850 Standard Test Method for Rapid Thermal Degradation of Solid Electrical Insulating Materials by Thermogravimetric Method (TGA). j) ASTM D 5423 Standard Specication for Forced-Convection Laboratory
39、Ovens for Evaluation of Electrical Insulation. FEBRUARY 22, 2016 UL 746F 6UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 6 Supplementary Test Procedures 6.1 These requirements are intended to be used in conjunction with the following requir
40、ements or standards: a) The Standard for Tests for Flammability of Plastic Materials for Parts in Devices and Appliances, UL 94, contains methods for evaluating the ammability of polymeric materials used for parts in electrical equipment. b) The Standard for Polymeric Materials Short Term Property E
41、valuations, UL 746A, contains short term test procedures to be used for the evaluation of materials used for parts intended for specic applications in electrical end products. c) The Standard for Polymeric Materials Long Term Property Evaluations, UL 746B, contains long term test procedures to be us
42、ed for the evaluation of materials used for parts intended for specic applications in end products. d) The Standard for Polymeric Materials Use in Electrical Equipment Evaluations, UL 746C, contain programs for evaluating polymeric materials. UL 746C is intended for the evaluations of polymeric mate
43、rials in specic applications in end products. e) The Standard for Polymeric Materials Industrial Laminates, Filament Wound Tubing, Vulcanized Fibre, and Materials Used in Printed-Wiring Boards, UL 746E, contain programs for evaluating polymeric materials. UL 746E is intended for the evaluation of po
44、lymeric materials in specic applications in printed wiring boards. f) The Standard for Printed Wiring Boards, UL 796, contains the minimum performance requirements for printed wiring boards. g) The Standard for Flexible Materials Interconnect Constructions, UL 796F, contains the minimum performance
45、requirements for exible printed wiring boards and interconnect constructions. 7 Glossary 7.1 For the purposes of this Standard, the following denitions apply. 7.2 ADHESIVE A substance such as glue or cement used to join, bond, or fasten materials or objects together. 7.3 ADHESIVELESS Sputtered on or
46、 Cast on lm. Adhesiveless does not include Laminated materials. 7.4 AS-RECEIVED Specimens or samples in an unconditioned state, prior to being subject to conditioning, or without a history of conditioning. 7.5 BASE DIELECTRIC MATERIAL An organic or inorganic dielectric barrier material, used to supp
47、ort conductor material. 7.6 BASE MATERIAL An organic or inorganic insulating material used to support a pattern of conductor material, with or without integral adhesive material, with or without integral conductor material. JANUARY 13, 2012 UL 746F 7UL COPYRIGHTED MATERIAL NOT AUTHORIZED FOR FURTHER
48、 REPRODUCTION OR DISTRIBUTION WITHOUT PERMISSION FROM UL 7.7 BASE MATERIAL THICKNESS The thickness of the base dielectric material excluding conductive foil or material deposited on the surfaces. If an adhesive is used for the base material, the adhesive thickness and number of sides is indicated se
49、parately. 7.8 BONDING FILM The layer of insulation used to bond discrete layers during lamination of multilayer exible printed wiring board constructions. A general term used to describe bondply and freelm. See also Bondply and Freelm. 7.9 BONDING LAYER An adhesive layer used to bond discrete layers during lamination. 7.10 BONDPLY See Bonding Film. 7.11 BUILD-UP THICKNESS Overall thickness of a combination of materials.
