ASTM D4568-1999(2004)e1 Standard Test Methods for Evaluating Compatibility Between Cable Filling and Flooding Compounds And Polyolefin Wire and Cable Materials《评价电缆填充物、溢流元件、聚烯烃线和电缆.pdf

1、Designation: D 4568 99 (Reapproved 2004)e1An American National StandardStandard Test Methods forEvaluating Compatibility Between Cable Filling andFlooding Compounds And Polyolefin Wire and CableMaterials1This standard is issued under the fixed designation D 4568; the number immediately following the

2、 designation indicates 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 (e) indicates an editorial change since the last revision or reapproval.e1NOTENon-mandatory language was rep

3、laced throughout editorially in November 2004.1. Scope1.1 These test methods evaluate the compatibility 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

4、.1.2 These test methods are useful to ensure compatibilityand to verify that new formulations of filling 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 e

5、valuated for possible use not degraded by contactwith fillers or floodants already in use.1.3 Whenever 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 a

6、ll of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this 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:2D 1711 Terminology

7、Relating to Electrical InsulationD 1928 Practice for Preparation of Compression-MoldedPolyethylene Test Sheets and Test Specimens3D 2633 Test Methods for Thermoplastic Insulations andJackets for Wire and CableD 4730 Specification for Flooding Compounds for Tele-communications Wire and CableD 4731 Sp

8、ecification for Hot-Application Filling Com-pounds for Telecommunications Wire and CableD 4732 Specification for Cool-Application Filling Com-pounds for Telecommunications Wire and CableD 5423 Specification for Forced-Convection LaboratoryOvens for Evaluation of Electrical Insulation3. Terminology3.

9、1 Definitions:3.1.1 For definitions of terms used in these test methods,refer to Terminology D 17113.2 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 o

10、f several materials (seeSpecifications D 4731 and D 4732) used to fill the air spaces inthe cores 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 com

11、poundany of several materials (seeSpecification D 4730) used to flood wire or cable sheathinterfaces (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 telecommuni

12、cations wire and cable intended fordirect burial.4. 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 during wire and

13、cable1These test methods are under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.18 on Solid Insulations, Non-Metallic Shieldings, and Cover-ings for Electrical Wires and Cables. Members of ASTM Committee

14、D02 onPetroleum Products and Lubricants and ASTM Committee B07 on Light Metals andAlloys have contributed to these test methods.Current edition approved April 10, 1999. Published June 1999. Originallyapproved in 1986. Last previous edition approved in 1993 as D 4568 93.2For referenced ASTM standards

15、, 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.3Withdrawn.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshoho

16、cken, PA 19428-2959, United States.manufacturing. 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

17、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 screens incompleted wire and cable. Delamination is primarily a functionof the test tempera

18、ture 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 Degradation of physical properties of insulation, jack-ets, core coverings, etc. Likely ma

19、nifestations of degradationof plastic material include embrittlement of some materials andexcessive 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

20、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, conforming to Specifi-cation D 5423, Type II.5.2 ContainersGlass or other containers of suit

21、able 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 thetest requirement.5.5 Mill, Press, and Molding Equipment, as needed forpreparation of compr

22、ession 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 other affected wire and cable materials to be evaluatedare representative of the materials

23、 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 and steel shielding and armoring material used intelecommunications wire and cables.8. Spec

24、imen 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 easily into a container (beaker, graduated cylin-der, etc.)8.2 Heat a quantity of the filling

25、 or flooding compound to atemperature such that all components of the compound are insolution and the compound is a homogenous pourable liquid(98 C minimum). Maintain at a temperature higher than 102C only if necessary for pouring. A standardized pouringtemperature of 100 6 2 C is preferred in order

26、 to produceuniform testing. Record melting and pouring temperaturesused, together 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 imm

27、ersed metal tape into an oven preheated tothe temperature mutually agreed upon between the wire andcable manufacturer and the purchaser. Unless otherwise speci-fied, maintain this temperature for a period of 168 h (7 days)minimum. See Note 1.NOTE 1It may be desirable to age specimens at more than on

28、etemperature (60 6 1 C and 80 6 1 C are commonly used) or to age allspecimens to a failure time, or both. If specimens are being aged to failure,it is suggested that sets of specimens be removed from the oven at the endof interim periods (that is, after 7 days, after 14 days, etc).10. Specimen Exami

29、nation10.1 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 wiping the specimen and do notexpose it to solvents to remove the filling or flooding

30、 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 container ofimmersed tape to permit extracting it, but recognize that such reheatingmay

31、 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 extracttape specimens.10.2 Allow the specimen to cool to room ambient condi-tions.10.3 Vi

32、sually 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, consider any visual evi-dence of delamination of coated metal to be a failure.11.2 ReportThe r

33、eport shall be in accordance with Sec-tion 23.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.D 4568 99 (2004)e1213. Specimen Preparatio

34、n 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 by the product specifica-tion, evaluate white insulation. (White ins

35、ulation is normallyheavily loaded and is common to most telecommunicationswire and cable products.) Evaluate the other basic telecommu-nications wire and cable colors when required by the productspecification or when otherwise deemed necessary.13.1.3 Use a sample length long enough to permit testing

36、before 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 condition described (seeNote 1). Unless otherwise specified, a set of sp

37、ecimens 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 tensile strength (nominal) and per-centage elongation at the break of th

38、e insulation with theconductor removed (see Test Specimen section of Test Meth-ods D 2633 for methods of removing the conductor). Use testmethods, gage marks, and initial jaw separation in accordancewith Test Methods D 2633. Record results for each specimen“before aging.”13.4 In addition to straight

39、ened 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 enough pigtail samples to permitexamination as specified in 15.2

40、.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(98 C minimum). Maintain at a temperature higher than 102C only if necessary for pouring. A standardized pouringtemperatur

41、e of 100 6 2 C is preferred in order to produceuniform testing. Record melting and pouring temperatures usedtogether 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

42、 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 excessquantities of compound for a matter of seconds rather thanhours; see Note 3

43、).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 Aging14.1 Place the insulated conductor specimens, coated anduncoate

44、d, 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 4Testing of insulations and jackets may be continued beyondthe 28

45、 day minimum period to obtain more data. For long term testing (upto a year of aging), interim examinations at monthly intervals arerecommended. Interim intervals beyond 1 year of aging may be length-ened appropriately.15. Specimen Retest and Examination15.1 At the conclusion of the test period, rem

46、ove 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 stressing the specimens. Do notstraighten the pigtail specimens during

47、this cleaning process.Allow them to cool to room ambient conditions.15.2 Visually examine (normal or corrected-to-normal vi-sion, 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

48、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 evidence ofcracking in pigtail specimens to be a failure.16.2 Exce

49、pt 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 Sec-tion 23.COMPATIBILITY 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 a