Plastics Recognition Help
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  QMFZ2 Component - Plastics

Monday, May 04, 1998
(date of last revision)

E000000    

  ABC Company
  Northbrook, IL 60062-2096
  Material Designation: 1000G(a)
  Product Description: Polyamide 6 (PA6), glass reinforced, furnished in the form of pellets.

Color
Min. Thk.
mm
Flame
Class

HWI

HAI
RTI
Elec
RTI
Imp
RTI
Str
IEC
GWIT
IEC
GWFI
 
NC, BK 0.75 V-2 3 0 100 65 65 - -
                            1.5 V-0 2 0 100 85 85 750 900
                            3.0 V-0, 5VA 1 0 100 95 100 750 900

CTI: 0       HVTR:  3       D495: 7      IEC BP: 120    

  (a) - Represents a number 10-30 incl.
  Report Date: 10/20/1988

Underwriters Laboratories Inc

   (Subscriber #)

UL94 small-scale test data does not pertain to building materials, furnishings and related contents. UL 94 small-scale test data is intended solely for determining the flammability of plastic materials used in components and parts of end-product devices and appliances, where the acceptability of the combination is determined by ULI.


Plastics (QMFZ2) Guide Information

These materials have been tested in accordance with established procedures to define their properties in order to facilitate evaluation of their use in end-use product applications. The tests may include the determination of material flammability (burning characteristics), ignition characteristics from various thermal and electrical sources, electrical tracking and other electrical characteristics, physical and mechanical characteristics, and analytical tests. In addition, the effect of long-term exposure to elevated temperature (air-oven aging), water, ultraviolet light, cold, etc. on property-retention may be evaluated. Due to space limitations, only a limited number of property values may be presented on the individual Recognitions. In those cases where the materials have the same performance characteristics, with the exception of weathering resistance, they are tabulated together as a group with each material designation separated by a comma. These Recognitions may include alternate designations as well as materials that are basically similar in composition but differ by some minor variation, such as molecular weight, lubricants, colorants, etc. Materials within these groupings should be considered equivalent in performance and can be interchanged without additional testing of the end-use product. The colors shown thereon are as pigmented by the material manufacturer; unless otherwise indicated, the property values are for the unpigmented (Natural color) material. Refer to the category Component-Plastics, Flame Retardant and/or Color Concentrates For (QMQS2) and Underwriters Laboratories, Inc. Standard for Polymeric Materials-Fabricated Parts, UL746D for limitations on the use of concentrates by the part molder or processor.


Colors -  The following abbreviations may be used on the individual Recognitions to represent the material color.

Abbreviation Color Abbreviation Color Abbreviation Color
AL Aluminum CL Clear OP Opaque
ALL Any color CT Clear Transparent OR Orange
AM Amber DK Dark PK Pink
AO All Opaque GD Gold RD Red
AT All Transparent GN Green SM Smoke
BG Beige GY Gray TL Translucent
BK Black GT Granite TN Tan
BL Blue IV Ivory TP Transparent
BN Brown LT Light VT Violet
BZ Bronze NC Natural (No pigmentation) WT White
CH Charcoal OL Olive YL Yellow

Levels of performance characteristics required for a particular end-use product application shall be in accordance with the requirements of the end-use product standard.

Flammability - Materials may be classified based on burning tests conducted in accordance with Underwriters Laboratories Inc. Standard Tests For Flammability of Plastic Materials For Parts In Devices and Appliances, UL 94. By small-scale tests, materials are classified as V-0, V-1, V-2, HB, VTM-0, VTM-1, VTM-2, HF-1, HF-2, or HBF. In addition, some materials may also secondarily be classified as 5VA or 5VB. Materials may also be evaluated using the radiant panel in accordance with ASTM E-162 (referenced in UL94); such flame spread indices are shown as "RP25", "RP100", etc. UL94 small-scale test data does not pertain to building materials, furnishings and related contents. UL94 small-scale test data is intended solely for determining the flammability of plastic materials used in the components and parts of end-use product devices and appliances, where the acceptability of the combination is determined by UL Inc.

In addition, some materials have been subjected to Fire Tests in accordance with Underwriters Laboratories Inc. Standard Test Method for Surface Burning Characteristics of Building Materials, UL723 which provides data concerning (1) flame spread, (2) fuel contributed, and (3) smoke developed. For the classification of building materials, see "Building Materials Directory".


Thermal Aging Program -The materials covered by this program have, in many cases, been investigated with respect to retention of certain critical properties (e.g. dielectric, tensile, impact, and the like) as part of a long-time thermal-aging program conducted in accordance with Underwriters Laboratories Inc. Standard for Polymeric Materials-Long Term Property Evaluations, UL746B. The end-of-life of a material at each test temperature in this program has been assumed to be the time when the value of the critical property had decreased to 50 percent of its original (as received) value. If a material has been investigated under the thermal aging program, the Relative Temperature Index (RTI), in degrees C shown is based on a comparison with a material which has acceptable service experience and correlates numerically with the temperatures above which the material is likely to degrade prematurely. If a material has not been investigated under the thermal aging program, the temperature index shown is based on the generic class of the material. A tabulation of the temperature indices according to generic material class is included in UL746B and is based on past field-test performance and chemical structure.

More than one RTI may be appropriate for a given material depending on the property requirements for a given application. In certain cases, higher temperatures are permitted if so specified by the end-use product standard.

Relative Temperature Index (RTI) - Maximum service temperature for a material, where a class of critical property will not be unacceptably compromised through chemical thermal degradation, over the reasonable life of an electrical product, relative to a reference material having a confirmed, acceptable corresponding performance defined RTI.

RTI Elec - Electrical RTI, associated with critical electrical insulating properties.

RTI Mech Imp - Mechanical Impact RTI, associated with critical impact resistance, resilience and flexibility properties.

RTI Mech Str - Mechanical Strength (Mechanical without Impact) RTI, associated with critical mechanical strength where impact resistance, resilience and flexibility are not essential.


Electrical Properties - Performance may be evaluated with respect to electrical track resistance, ability to resist ignition from electrical sources, and other electrical properties. Tests were performed using 60 Hertz unless otherwise specified.

Performance Level Categories-In order to avoid an excessive level of implied precision and bias, material performances for several tests are recorded as Performance Level Categories (PLC), based on the mean test results (rather than recording the exact numerical results), as indicated in the table following the test description.


Hot-wire Ignition (HWI) - Performance is expressed as the mean number of seconds needed to either ignite standard specimens or to burn through the specimens without ignition. The specimens are wrapped with resistance wire that dissipates a specified level of electrical energy.

HWI Range
Mean Ignition Time (In Sec)
PLC
Assigned
120 and longer 0
60 through 119 1
30 through 59 2
15 through 29 3
7 through 14 4
Less than 7 5

High Amp Arc Ignition (HAI) -Performance is expressed as the number of arc rupture exposures (standardized as to electrode type and shape and electric circuit) which are necessary to ignite a material when they are applied at a standard rate on the surface of the material.

HAI Range
Mean Number of Arcs Assigned
PLC
Assigned
120 and greater 0
60 through 119 1
30 through 59 2
15 through 29 3
Less than 15 4

High Voltage Arc Tracking Rate (HVTR) - is denoted as the rate, is mm/min, that a tracking path can be produced on the surface of the material under standardized test conditions. Note is made if ignition on the material takes place. The results of testing the nominal 3 mm thickness are considered representative of the material's performance in any thickness.

HVTR Range
Assigned (in mm/min)
PLC
Assigned
0 through 10 0
10.1 through 25.4 1
25.5 through 80 2
80.1 through 150 3
Greater than 150 4

Arc Resistance (D495) - in accordance with ASTM-D495 is expressed as the number of seconds that a material resists the formation of a surface conducting path when subjected to an intermittently occurring arc of high voltage, low current characteristics. The results of testing the nominal 3 mm thickness are considered representative of the material's performance in any thickness.

D495 Range
Mean Time of arc Resistance (in Sec)
PLC
Assigned
420 and longer 0
360 through 419 1
300 through 359 2
240 through 299 3
180 through 239 4
120 through 179 5
60 through 119 6
Less than 60 7

Comparative Tracking Index (CTI) - is 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.

CTI Range
Tracking Index(in Volts)
PLC
Assigned
600 and Greater 0
400 through 599 1
250 through 399 2
175 through 249 3
100 through 174 4
Less than 100 5

IEC Glow Wire Ignitability Temperature (GWIT) - in accordance with IEC 695-2-1/3, is expressed as the temperature (in degrees C), which is 25 C hotter than the maximum temperature of the tip of the glow-wire which does not cause ignition of the material during three subsequent tests.


IEC Glow Wire Flammability Temperature (GWFI) - in accordance with IEC 695-2-1/2, is expressed as the highest temperature (in degrees C) at which, during three subsequent tests, flaming or glowing of the test specimen extinguish within 30 seconds after removal of the glow-wire without ignition of the indicator by burning drips or particles.


IEC Ball Pressure Temperature (BP) - in accordance with IEC 695-10-2, is expressed as the temperature (in degrees C) where a 5mm diameter ball causes a 2mm diameter or less impression on the material surface.


The above characteristics and dielectric strength, volume resistivity and other electrical and mechanical properties may be determined by means of the applicable ASTM and/or UL specification in the Underwriters Laboratories Inc. Standard for Polymeric Materials-Short Term Property Evaluations, UL746A. In addition to minimum electrical and ignition test levels, materials which are used in applications involving support or contact with current-carrying parts are also required to display a minimum stability (heat distortion, moisture resistance, dimensional stability and mold stress) performance level, as described in the Underwriters Laboratories Inc. Standard for Polymeric Materials-Use in Electrical Equipment Evaluations, UL746C.

To determine compliance of a material for a specific application, the test values generated for that material should be compared with the minimum performance level established for that application as outlined in the product standard.


Molding and Fabricating Considerations - To be acceptable for use in end-use product applications, some materials must meet applicable requirements concerning the molding and fabricating of finished parts as described in Underwriters Laboratories Inc. Standard for Polymeric Materials – Fabricated Parts, UL746D.

Manufacturers who produce the following components: Filament Wound Tubing, Industrial Laminates, Vulcanized Fibre, and Materials for use in Fabricating Printed Wiring Boards (QMTS2), Coatings for use on Recognized Printed Wiring Boards (QMJU2), Metallized Parts (QMRX2), Supplier Components for use in the Fabrication of Metallized Parts (QMSS2), Electrical Insulation Systems (OBJY2), Adhesives (QOQW2), Flame Retardants and/or Color Concentrates (QMQS2), or Molded Release Lubricants (QMSX2) are not covered under the Component Plastics category. Requirements concerning these products are located in the respective product category information pages.

The following are considerations to be made in judging the use of these materials in an end-use product.

1. Material identification traceability for parts covered under the Fabricated Parts (QMMY2) category.

2. Identification for a device employing parts molded of these materials should specify the parts' wall thickness, color, material identification, and traceability.

3. Unless otherwise indicated, suitability for use when exposed to weathering, oils, soaps, chemicals, x-rays and the like, has not been determined.

4. Evaluation of parts for other than the properties investigated, in accordance with the applicable UL end-use product standard and/or requirements outlined in the Standard for Polymers Material - Use in Electrical Equipment Evaluation, UL746C. Additional Conditions of acceptability may be included in the individual Recognition Reports.


Generic Material Symbols - The following are the most common symbols that may be used on the individual Recognitions to represent the generic material type. The generic material symbols are based upon the terminology developed in the International Organization for Standardization publications covering "Plastics-Symbols" (ISO 1043) and "Rubbers and Latices" (ISO 1629).

 

Generic Material Symbol
Acrylonitrile Butadiene Styrene ABS
Acrylonitrile Styrene Acrylate ASA
Alkyd Molding Compound AMC
Cellulose Acetate CA
Cellulose Acetate Butyrate CAB
Cellulose Acetate Propionate CAP
Chloroprene Rubber CR
Diallyl Phthalate DAP
Dough Molding Compound DMC
Epoxy EP
Ethylene/Propylene/Diene EPDM
Ethylene/Propylene E/P
Ethylene/Vinyl Acetate E/VAC
Ethylene/Tetrafluoroethylene E/TFE
Liquid Crystal Polymer LCP
Melamine-Formaldehyde MF
Melamine/Phenolic M/P
Methyl Methacrylate Butadiene Styrene MMBS
Natural Rubber NR
Neoprene (Chloroprene Butadiene) Rubber CBR
Nitrile Rubber NBR
Perfluoro Alkoxyl Alkene PFA
Phenol-Formaldehyde (Phenolic) PF
Polyamide (Nylon) PA
Polyamide Imide PAI
Polyarylate PAR
Polybutadiene Rubber PBR
Polybutylene Terephthalate PBT
Polycarbonate PC
Polycarbonate/Acrylic PC/A
Polychlorotrifluoroethylene PCTFE
Polyetheretherketone PEEK
Polyether Imide PEI
Polyethersulfone PES
Polyethylene PE
Polyethylene Terephthalate PET
Polymethyl Pentene PMP
Polyoxymethylene (Acetal) POM
Polyphenylene Ether PPE
Polyvinyl Acetate PVAC
Perfluoroethylene Propylene FEP
Polyimide PI
Polymethyl Methacrylate PMMA
Polyphenylene Oxide PPHOX
Polyphenylene Sulfide PPS
Polypropylene PP
Polystyrene PS
Polysulfone PSU
Polytetrafluoroethylene PTFE
Polyurethane PUR
Polyvinyl Chloride PVC
Polyvinylidene Fluoride PVDF
Polyvinyl Fluoride PVF
Polyester PER
Sheet Molding Compound SMC
Silicone Rubber SI
Silicone Molding Compound SIR
Styrene Acrylonitrile AS
Styrene/Butadiene S/B
Styrene (Butadiene) Rubber SBR
Styrene Maleic Anhydride SMA
Styrene/Methylmethacrylate S/MMA
Thermo Elastomeric TEE
Urea-Formaldehyde UF
Unsaturated Polyester UP

Foamed Materials - Materials which have been foamed with the introduction of a chemical blowing agent or inert gas may have significantly different properties than the unfoamed or solid material form; therefore, ratings that are established for solid (unfoamed) material do not automatically apply to the foamed version of that same material.

Investigation of Materials Used For Structural Parts in Room Air Conditioners - Where the retention of physical properties for a material have been investigated for structural parts in specific applications, such as room air conditioners, they are so noted in the individual Recognitions and meet a minimum level beyond which consideration depends on the actual design and use of the part.

Materials For Use in Special Environments - Investigation of materials for specific end-use product applications where requirements exist for the retention of properties after exposure to certain critical operating and/or environmental conditions, may be indicated in the individual Recognitions.

Composite Materials - These materials consist of a sandwich type construction of a metal and a plastic and have been tested for flammability only to determine compliance with UL94. They may also contain an adhesive which serves to bond the individual components into a composite structure.


Abbreviations - The following abbreviations are used on the column headings for the individual Recognitions.

Abbreviation

Term

Min Thk. mm Minimum Thickness in millimeters
Flame Class UL 94 Flammability Classification
HWI Hot Wire Ignition
HAI High Amp Arc Ignition
RTI Relative Temperature Index
Elec Electrical
Imp Impact
Str Strength
CTI Comparative Tracking Index
HVTR High Voltage Arc Tracking Rate
D495 ASTM D495 Arc Resistance

Products Recognized under the Component Program are identified by significant markings, consisting of the manufacturer's identification and catalog, model or other product designation, which correspond with the marking specified in the Laboratories' published records. Only those components which actually carry the ''Marking'' shown in the individual Recognition should be considered as being covered under the Component Program. The Listing Mark of Underwriters Laboratories Inc. is not authorized for use on, or in connection with, Recognized Components.