1、Designation: D4568 13 An American National StandardStandard Test Methods forEvaluating Compatibility Between Cable Filling andFlooding Compounds And Polyolefin Wire and CableMaterials1This standard is issued under the fixed designation D4568; the number immediately following the designation indicate
2、s the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 These test methods evaluate the compatibility
3、 betweencable filling or cable flooding compounds, or both, andpolyolefin materials used in the manufacture of wire and cablethat are usually in intimate contact with the filler or floodant, orboth.1.2 These test methods are useful to ensure compatibilityand to verify that new formulations of fillin
4、g or floodingcompounds will have no deleterious effect upon the otherpolyolefin materials being used or, conversely, use thesemethods to ensure that other polyolefin wire and cable mate-rials are evaluated for possible use not degraded by contactwith fillers or floodants already in use.1.3 Whenever
5、two sets of values are presented, in differentunits, the values in the first set are the standard, while those inparentheses are for information only.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this
6、standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D1711 Terminology Relating to Electrical InsulationD1928 Practice for Preparation of Compression-MoldedPolyethylene Test S
7、heets and Test Specimens (Withdrawn2001)3D2633 Test Methods for Thermoplastic Insulations andJackets for Wire and CableD4730 Specification for Flooding Compounds for Telecom-munications Wire and CableD4731 Specification for Hot-Application Filling Com-pounds for Telecommunications Wire and CableD473
8、2 Specification for Cool-Application Filling Com-pounds for Telecommunications Wire and CableD5423 Specification for Forced-Convection Laboratory Ov-ens for Evaluation of Electrical Insulation3. Terminology3.1 Definitions:3.1.1 For definitions of terms used in these test methods,refer to Terminology
9、 D17113.2 Definitions of Terms Specific to This Standard:3.2.1 aging (act of), nexposure of materials to filling orflooding compound at a specified temperature for a specifiedtime.3.2.2 filling compoundany of several materials (see Speci-fications D4731 and D4732) used to fill the air spaces in thec
10、ores of multi-conductor insulated wires and cables for thepurpose of excluding air or moisture or both; especially withregard to telecommunications wire and cable intended fordirect burial.3.2.3 flooding compoundany of several materials (seeSpecification D4730) used to flood wire or cable sheathinte
11、rfaces (for example, the region between core wrap and ashield, between a shield and a jacket, etc.) to eliminate or tominimize normal voids or air spaces in these areas; especiallywith regard to telecommunications wire and cable intended fordirect burial.1These test methods are under the jurisdictio
12、n of ASTM Committee D09 onElectrical and Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.18 on Solid Insulations, Non-Metallic Shieldings and Coveringsfor Electrical and Telecommunication Wires and Cables. Members of ASTMCommittee D02 on Petroleum Products and Lu
13、bricants and ASTM Committee B07on Light Metals and Alloys have contributed to these test methods.Current edition approved Nov. 1, 2013. Published December 2013. Originallyapproved in 1986. Last previous edition approved in 2009 as D4568 99(2009).DOI: 10.1520/D4568-13.2For referenced ASTM standards,
14、visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.*A Summar
15、y of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Significance and Use4.1 Cable filling and flooding compounds are normallysemi-solid at room temperature and fluid in varying de
16、grees atelevated temperatures. They are normally applied in a liquidstate and at an elevated temperature during wire and cablemanufacturing. The completed finished wire or cable is ex-posed to various ambient conditions during its useful life. If notcarefully selected, components of filling or flood
17、ing com-pounds have the potential to degrade the materials they contact,short term or long term. The following methods are intended tominimize the chances of such problems occurring.4.2 Some of the effects that might occur include, but are notlimited to:4.2.1 Delamination of coated metal shields or
18、screens incompleted wire and cable. Delamination is primarily a functionof the test temperature and the type of laminant used, so testresults are unlikely to vary significantly between filling orflooding compounds of a common family (for example, petro-leum based filling or flooding compounds).4.2.2
19、 Degradation of physical properties of insulation,jackets, core coverings, etc. Likely manifestations of degrada-tion of plastic material include embrittlement of some materialsand excessive softening of other materials.4.3 Since the magnitude of any given effect will vary, sometest procedures will
20、be more critical than others. It is not,therefore, intended that every listed procedure be performedwith every compatibility study. Perform procedures to theextent required by product specifications or as agreed uponbetween the producer and the purchaser.5. Apparatus5.1 OvenForced-convection oven, c
21、onforming to Specifi-cation D5423, Type II.5.2 ContainersGlass or other containers of suitable size,shape, and make-up as required to hold the designated speci-mens.5.3 Clamps, or other devices as suitable for holding speci-mens in the oven.5.4 Tensile Strength Testing Apparatus, as specified by the
22、test requirement.5.5 Mill, Press, and Molding Equipment, as needed forpreparation of compression molded specimens as required.5.6 Miscellaneous Lab EquipmentTowels, knives, etc. asrequired for cleaning and cutting specimens.6. Sampling6.1 Ensure that samples of filling and flooding compoundsand the
23、other affected wire and cable materials to be evaluatedare representative of the materials to be used or to be found inthe finished products.COMPATIBILITY EVALUATION BETWEENCOATED METALS AND FILLING OR FLOODINGCOMPOUNDS7. Scope7.1 This test method is specifically for polyolefin coatingson aluminum a
24、nd steel shielding and armoring material used intelecommunications wire and cables.8. Specimen Preparation8.1 Cut a specimen of coated metal tape (shielding tape,armor tape, screen tape) 6 in. (150 mm) long for evaluation. Ifa choice of tape widths is possible, select a width narrowenough to fit eas
25、ily into a container (beaker, graduatedcylinder, etc.)8.2 Heat a quantity of the filling or flooding compound to atemperature such that all components of the compound are insolution and the compound is a homogenous pourable liquid(98C minimum). Maintain at a temperature higher than 102Conly if neces
26、sary for pouring. A standardized pouring tempera-ture of 100 6 2C is preferred in order to produce uniformtesting. Record melting and pouring temperatures used, to-gether with other relevant laboratory data.8.3 Pour the melted compound into the container holdingthe coated metal tape. Pour sufficient
27、 material to ensure that thetape is completely covered.9. Specimen Aging9.1 Place the immersed metal tape into an oven preheated tothe temperature mutually agreed upon between the wire andcable manufacturer and the purchaser. Unless otherwisespecified, maintain this temperature for a period of 168 h
28、 (7days) minimum. See Note 1.NOTE 1It is desirable to age specimens at more than one temperature(60 6 1C and 80 6 1C are commonly used) or to age all specimens toa failure time, or both. If specimens are being aged to failure, it issuggested that sets of specimens be removed from the oven at the end
29、 ofinterim periods (that is, after 7 days, after 14 days, etc).10. Specimen Examination10.1 After the aging period is concluded and before cooling,extract the metal tape from the container of filling or floodingmaterial. Allow as much as possible of the compound to drainfrom the specimen. Avoid wipi
30、ng the specimen and do notexpose it to solvents to remove the filling or flooding material.(See Note 2.)NOTE 2High melt-temperature filling and flooding materials mayhave to be removed from the tape by mechanical or other means. If noother choice is possible, it may be necessary to reheat the contai
31、ner ofimmersed tape to permit extracting it, but recognize that such reheatingmay adversely bias test results by causing the coated metal(s) to behave ina manner not encountered during a normal cable life. Recorded laboratorydata should include descriptions of any special techniques used to extractt
32、ape specimens.D4568 13210.2 Allow the specimen to cool to room ambient condi-tions.10.3 Visually examine (normal vision or corrected-tonormalvision, without magnification) the specimen of coated metaltape for evidence of delamination.11. Interpretation of Results11.1 Unless otherwise specified, cons
33、ider any visual evi-dence of delamination of coated metal to be a failure.11.2 ReportThe report shall be in accordance with Section23.COMPATIBILITY EVALUATIONS FORPOLYOLEFIN INSULATIONS AND FILLINGOR FLOODING COMPOUNDS12. Scope12.1 This test method is specifically for polyolefin insulat-ing material
34、s used in telecommunications wires and cables.13. Specimen Preparation and Initial Testing13.1 Obtain samples of typical insulated conductors forevaluation.13.1.1 Where various insulated conductor sizes are avail-able for evaluation, test the smallest conductor size.13.1.2 Unless otherwise permitted
35、 by the productspecification, evaluate white insulation. (White insulation isnormally heavily loaded and is common to most telecommu-nications wire and cable products.) Evaluate the other basictelecommunications wire and cable colors when required bythe product specification or when otherwise deemed
36、 necessary.13.1.3 Use a sample length long enough to permit testingbefore and after exposure to the filling or flooding materials inquestion.13.2 Unless otherwise specified, cut the samples to obtain aminimum of 10 specimens for each color and material beingevaluated and for each environmental condi
37、tion described (seeNote 1). Unless otherwise specified, a set of specimens consistsof a minimum of one specimen of each color and material ineach test configuration (such as straight and pigtail) beingevaluated.13.3 Select at least one specimen of each color and materialunder study and measure tensi
38、le strength (nominal) and per-centage elongation at the break of the insulation with theconductor removed (see Test Specimen section of Test Meth-ods D2633 for methods of removing the conductor). Use testmethods, gage marks, and initial jaw separation in accordancewith Test Methods D2633. Record res
39、ults for each specimen“before aging.”13.4 In addition to straightened specimens of insulatedconductor, prepare pigtail samples of insulated conductor bywrapping individual specimens for 10 complete turns around amandrel equal to the outside diameter of the insulated conduc-tor. As a minimum, prepare
40、 enough pigtail samples to permitexamination as specified in 15.2.13.5 Heat a quantity of the filling or flooding compound toa temperature such that all components of the compound are insolution and the compound is a homogenous pourable liquid(98C minimum). Maintain at a temperature higher than 102C
41、only if necessary for pouring. A standardized pouring tempera-ture of 100 6 2C is preferred in order to produce uniformtesting. Record melting and pouring temperatures used to-gether with other relevant laboratory data.13.6 Coat some (normally one half) of the specimens (bothstraight and pigtail) wi
42、th the filling or flooding material. Dipthe specimens or paint the heated and liquified material on witha brush, etc., so the outer surface is completely covered 0.001to 0.002 in. (0.025 to 0.050 mm). Do not soak the specimens inthe compound in a dipping or similar process (expose to excessquantitie
43、s of compound for a matter of seconds rather thanhours; see Note 3).NOTE 3The intent of this procedure is to provide heat aging ofinsulating and jacketing material in an oven and not in hot grease; hence,the prohibition against soaking as described in 13.6 and 18.5 of this testmethod.14. Specimen Ag
44、ing14.1 Place the insulated conductor specimens, coated anduncoated, into an oven preheated to the temperature mutuallyagreed upon between the cable manufacturer and the purchaser.Unless otherwise specified, maintain this temperature for aperiod of 672 h (28 days) minimum. See Note 1 and Note 4.NOTE
45、 4Testing of insulations and jackets can be continued beyond the28 day minimum period to obtain more data. For long term testing (up toa year of aging), interim examinations at monthly intervals are recom-mended. Interim intervals beyond 1 year of aging can be lengthenedappropriately.15. Specimen Re
46、test and Examination15.1 At the conclusion of the test period, remove the sets ofspecimens (both straight and pigtail) from the ovens. Using apaper towel or a clean dry cloth (no solvents), gently wipe thespecimens to remove as much of the filling or flooding materialas possible without unduly stres
47、sing the specimens. Do notstraighten the pigtail specimens during this cleaning process.Allow them to cool to room ambient conditions.15.2 Visually examine (normal or corrected-to-normalvision, without magnification) the pigtail specimen(s) of insu-lated conductor for evidence of cracking.15.3 Test
48、the heat aged specimens of straight insulatedconductors (coated and uncoated) as in 13.3. Record the resultsfor each specimen after aging, and calculate the percentagedifference between “before” and “after” test results.16. Interpretation of Results16.1 Unless otherwise specified, consider visual ev
49、idence ofcracking in pigtail specimens to be a failure.16.2 Except as noted in 16.1, Pass or Fail interpretations ofinsulation compatibility evaluations are as agreed upon be-tween the parties involved, and based upon the determinationof percentage retention of properties at the end of heat aging atthe agreed-upon temperature.16.3 ReportThe report shall be in accordance with Section23.D4568 133COMPATIBILITY EVALUATIONS FORPOLYOLEFIN JACKETING COMPOUNDSAND FILLING AND FLOODINGCOMPOUNDS17. Scope17.1 This test method is specifically for polyolefin jacketingmateria
