1、Designation: D4568 13Standard 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 indicates the year oforiginal adoption
2、 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 betweencable filling or cable
3、 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 filling or floodingcompounds will ha
4、ve 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 two sets of values are present
5、ed, 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 standard to establish appro-pr
6、iate 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 Sheets and Test Specimens (With
7、drawn2001)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 CableD4732 Specification for Cool-Appli
8、cation 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 D17113.2 Definitions of Terms
9、 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 thecores of multi-conductor insula
10、ted 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 sheathinterfaces (for example, the regio
11、n 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 jurisdiction of ASTM Committee D09 onElec
12、trical and Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.07 on Electrical Insulating Materials. Members of ASTMCommittee D02 on Petroleum Products and Lubricants and ASTM Committee B07on Light Metals and Alloys have contributed to these test methods.Current edi
13、tion 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, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book o
14、f 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 Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive
15、, 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 degrees atelevated temperatures. They are normally applied in a liquidstate and at an elevated temperature du
16、ring 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 flooding com-pounds have the potential to degrade the materials they contact,short term or long term. The follow
17、ing 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 screens incompleted wire and cable. Delamination is primarily a functionof the test temperature and the typ
18、e 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 Degradation of physical properties of insulation,jackets, core coverings, etc. Likely manifestations of de
19、grada-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 be more critical than others. It is not,therefore, intended that every listed procedure be performedwith ev
20、ery 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, conforming to Specifi-cation D5423, Type II.5.2 ContainersGlass or other containers of suitable size,shape,
21、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 thetest requirement.5.5 Mill, Press, and Molding Equipment, as needed forpreparation of compression molded spe
22、cimens 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 other affected wire and cable materials to be evaluatedare representative of the materials to be used or to
23、 be found inthe finished products.COMPATIBILITY EVALUATION BETWEENCOATED METALS AND FILLING OR FLOODINGCOMPOUNDS7. Scope7.1 This test method is specifically for polyolefin coatingson aluminum and steel shielding and armoring material used intelecommunications wire and cables.8. Specimen Preparation8
24、.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 easily into a container (beaker, graduatedcylinder, etc.)8.2 Heat a quantity of the filling or flooding compou
25、nd 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 necessary for pouring. A standardized pouring tempera-ture of 100 6 2C is preferred in order to produce uniformt
26、esting. 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 material to ensure that thetape is completely covered.9. Specimen Aging9.1 Place the immersed metal tape i
27、nto 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 (7days) minimum. See Note 1.NOTE 1It is desirable to age specimens at more than one temperature(60 6 1C an
28、d 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 ofinterim periods (that is, after 7 days, after 14 days, etc).10. Specimen Examination10.1 After the aging
29、 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 wiping the specimen and do notexpose it to solvents to remove the filling or flooding material.(See Note 2.)NOT
30、E 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 container ofimmersed tape to permit extracting it, but recognize that such reheatingmay adversely bias test resul
31、ts 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 extracttape specimens.D4568 13210.2 Allow the specimen to cool to room ambient condi-tions.10.3 Visually examine (n
32、ormal vision or corrected-tonormalvision, without magnification) the specimen of coated metaltape for evidence of delamination.11. Interpretation of Results11.1 Unless otherwise specified, consider any visual evi-dence of delamination of coated metal to be a failure.11.2 ReportThe report shall be in
33、 accordance with Section23.COMPATIBILITY EVALUATIONS FORPOLYOLEFIN INSULATIONS AND FILLINGOR FLOODING COMPOUNDS12. Scope12.1 This test method is specifically for polyolefin insulat-ing materials used in telecommunications wires and cables.13. Specimen Preparation and Initial Testing13.1 Obtain sampl
34、es 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 by the productspecification, evaluate white insulation. (White insulation isnormally heavily loaded and is
35、 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 necessary.13.1.3 Use a sample length long enough to permit testingbefore and after exposure to the filling
36、 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 condition described (seeNote 1). Unless otherwise specified, a set of specimens consistsof a minimum of one spec
37、imen 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 tensile strength (nominal) and per-centage elongation at the break of the insulation with theconductor removed (
38、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 results for each specimen“before aging.”13.4 In addition to straightened specimens of insulatedconductor, prep
39、are 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 enough pigtail samples to permitexamination as specified in 15.2.13.5 Heat a quantity of the filling or fl
40、ooding 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 102Conly if necessary for pouring. A standardized pouring tempera-ture of 100 6 2C is preferred in order to pro
41、duce 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) with the filling or flooding material. Dipthe specimens or paint the heated and liquified material on witha b
42、rush, 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 excessquantities of compound for a matter of seconds rather thanhours; see Note 3).NOTE 3The intent of this procedure is t
43、o 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 Aging14.1 Place the insulated conductor specimens, coated anduncoated, into an oven preheated to the temperat
44、ure 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 4Testing of insulations and jackets can be continued beyond the28 day minimum period to obtain more data.
45、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 Retest and Examination15.1 At the conclusion of the test period, remove the sets ofspecimens (both straight a
46、nd 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 stressing the specimens. Do notstraighten the pigtail specimens during this cleaning process.Allow them to cool
47、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 the heat aged specimens of straight insulatedconductors (coated and uncoated) as in 13.3. Record the result
48、sfor each specimen after aging, and calculate the percentagedifference between “before” and “after” test results.16. Interpretation of Results16.1 Unless otherwise specified, consider visual evidence ofcracking in pigtail specimens to be a failure.16.2 Except as noted in 16.1, Pass or Fail interpret
49、ations 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 jacketingmaterials used in telecommunications wires and cables.18. Specimen Preparation and Initial Testing18.1 Obtain typi
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