ASTM D5814-10
(Practice)Standard Practice for Determination of Contamination in Recycled Poly(Ethylene Terephthalate) (PET) Flakes and Chips Using a Plaque Test
Standard Practice for Determination of Contamination in Recycled Poly(Ethylene Terephthalate) (PET) Flakes and Chips Using a Plaque Test
SIGNIFICANCE AND USE
Presence of paper, metal, or incompatible polymer contamination in poly(ethylene terephthalate) renders the recycled polymer unfit for use in secondary product manufacturing operations. This procedure is useful for identifying different types of contamination in recycled PET flakes.
SCOPE
1.1 This practice covers an indication of the quality of recycled transparent poly(ethylene terephthalate) by examination of a wafer or plaque formed by melting a representative sample and quenching it to prevent crystallization.
1.2 Specific contaminants and impurities such as aluminum particles, dirt particles, paper, and fibers are identified in the transparent wafer.
1.3 The overall color of the plaque is indicative of oxidizable contaminants such as ethylene-vinyl acetate (EVA) glue residue and the number of bubbles present in the plaque gives an indication of the moisture content of the sample.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Specific precautionary statements are given in Section 8.
Note 1—There is no known ISO equivalent to this standard.
General Information
Relations
Buy Standard
Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D5814 − 10
Standard Practice for
Determination of Contamination in Recycled Poly(Ethylene
1
Terephthalate) (PET) Flakes and Chips Using a Plaque Test
This standard is issued under the fixed designation D5814; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 3. Terminology
3.1 Definitions: The terminology used in this practice is in
1.1 This practice covers an indication of the quality of
accordance with Terminology D1600 and Guide D5033. Units
recycled transparent poly(ethylene terephthalate) by examina-
and symbols are in accordance with IEEE/ASTM SI 10:
tion of a wafer or plaque formed by melting a representative
Standard for Use of the International System of Units (SI).
sample and quenching it to prevent crystallization.
3.2 Definitions of Terms Specific to This Standard:
1.2 Specific contaminants and impurities such as aluminum
3.2.1 plaque—a transparent wafer resulting from melting
particles, dirt particles, paper, and fibers are identified in the
and rapid quenching of the polymer.
transparent wafer.
1.3 The overall color of the plaque is indicative of oxidiz-
4. Summary of Test Method
able contaminants such as ethylene-vinyl acetate (EVA) glue
4.1 Transparent poly(ethylene terephthalate) flakes are
residue and the number of bubbles present in the plaque gives
melted in an aluminum pan, then the molten sample is rapidly
an indication of the moisture content of the sample.
quenched in ice water to prevent crystallization. The resulting
1.4 This standard does not purport to address all of the
clear plaque is examined for color indicative of oxidizable
safety concerns, if any, associated with its use. It is the
contaminants, bubbles indicative of moisture, and solid con-
responsibility of the user of this standard to establish appro-
taminant particles.
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use. Specific precau-
tionary statements are given in Section 8.
5.1 Presence of paper, metal, or incompatible polymer
contamination in poly(ethylene terephthalate) renders the re-
NOTE 1—There is no known ISO equivalent to this standard.
cycled polymer unfit for use in secondary product manufactur-
ing operations. This procedure is useful for identifying differ-
2. Referenced Documents
ent types of contamination in recycled PET flakes.
2
2.1 ASTM Standards:
D1600 Terminology forAbbreviatedTerms Relating to Plas-
6. Apparatus
tics
6.1 Oven, forced convection type capable of heating
D5033 GuideforDevelopmentofASTMStandardsRelating
samples to 300°C.
to Recycling and Use of Recycled Plastics (Withdrawn
3
6.2 Tongs, long arm.
2007)
IEEE/ASTM SI 10 Standard for Use of the International
6.3 Stopwatch, 0.1-s accuracy.
System of Units (SI): The Modern Metric System
6.4 Bucket, 1 L, stainless steel.
4
6.5 Aluminum Weighing Dishes.
1 6.6 Thermally Insulated Gloves.
This practice is under the jurisdiction ofASTM Committee D20 on Plastics and
is the direct responsibility of Subcommittee D20.95 on Recycled Plastics.
Current edition approved Dec. 1, 2010. Published January 2011. Originally
7. Materials
approved in 1995. Last previous edition approved in 2002 as D5814 – 02.
7.1 Virgin Poly(ethylene terephthalate).
DOI:10.1520/D5814-10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.2 Ice.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
The last approved version of this historical standard is referenced on Aluminum weighing dishes, available from Fisher Scientific, or exact
www.astm.org. equivalents, have been found suitable for this purpose.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D5814 − 10
7.3 Paper Towels. The bucket should be about 90 % full with the ice and water
slurry. Place the bucket with the ice slurry as close to the oven
8. Hazards
as possible.
8.1 Always wear thermally insulated gloves when introduc-
9.7 At 10.00 min on the stopwatch, quickly remove the
ing or removing the polymer sample from the oven.
samples from the oven with the tongs and immediately
submergethemintotheicebath.Thisrapidquenchingprevents
9. Procedure
crystallization of the PET.
9.1 Preheat the oven to 275 6 5°C and equilibrate for 30
9.8 Remove the pans from the ice bath and blot dry with
m
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:D5814–02 Designation:D5814–10
Standard Practice for
Determination of Contamination in Recycled Poly(Ethylene
1
Terephthalate) (PET) Flakes and Chips Using a Plaque Test
This standard is issued under the fixed designation D5814; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This practice covers an indication of the quality of recycled transparent poly(ethylene terephthalate) by examination of a
wafer or plaque formed by melting a representative sample and quenching it to prevent crystallization.
1.2 Specific contaminants and impurities such as aluminum particles, dirt particles, paper, and fibers are identified in the
transparent wafer.
1.3 The overall color of the plaque is indicative of oxidizable contaminants such as ethylene-vinyl acetate (EVA) glue residue
and the number of bubbles present in the plaque gives an indication of the moisture content of the sample.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use. Specific precautionary statements are given in Section 8.
NOTE1—There is no equivalent ISO standard. 1—There is no known ISO equivalent to this standard.
2. Referenced Documents
2
2.1 ASTM Standards:
D1600 Terminology for Abbreviated Terms Relating to Plastics
D5033 Guide for Development of ASTM Standards Relating to Recycling and Use of Recycled Plastics
IEEE/ASTM SI-10EEE/ASTM SI 10 Standard for Use of the International System of Units (SI): The Modern Metric System
3. Terminology
3.1 Definitions: The terminology used in this practice is in accordance with Terminology D1600 and Guide D5033. Units and
symbolsareinaccordancewithIEEE/ASTMSI-10.IEEE/ASTMSI10:StandardforUseoftheInternationalSystemofUnits(SI).
3.2 Definitions of Terms Specific to This Standard:
3.2.1 plaque—a transparent wafer resulting from melting and rapid quenching of the polymer.
4. Summary of Test Method
4.1 Transparent poly(ethylene terephthalate) flakes are melted in an aluminum pan, then the molten sample is rapidly quenched
in ice water to prevent crystallization. The resulting clear plaque is examined for color indicative of oxidizable contaminants,
bubbles indicative of moisture, and solid contaminant particles.
5. Significance and Use
5.1 Presence of paper, metal, or incompatible polymer contamination in poly(ethylene terephthalate) renders the recycled
polymer unfit for use in secondary product manufacturing operations. This procedure is useful for identifying different types of
contamination in recycled PET flakes.
6. Apparatus
6.1 Oven, forced convection type capable of heating samples to 300°C.
6.2 Tongs, long arm.
6.3 Stopwatch, 0.1-s accuracy.
1
This practice is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.70 on Analytical Methods.
Current edition approved March 10, 2002. Published May 2002. Originally published as D5814–95. Last previous edition D5814–95. DOI: 10.1520/D5814-02.
Current edition approved Dec. 1, 2010. Published January 2011. Originally approved in 1995. Last previous edition approved in 2002 as D5814 – 02. DOI:10.1520/
D5814-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
D5814–10
6.4 Bucket, 1 L, stainless steel.
3
6.5 Aluminum Weighing Dishes.
6.6 Thermally Insulated Gloves.
7. Materials
7.1 Virgin Poly(ethylene terephthalate).
7.2 Ice.
7.3 Paper Towels.
8. Hazards
8.1 Always wear thermally insulated gloves when introducing or removing the polymer sample from the oven.
9. Procedure
9.1 Preheat the oven to 275 6 5°C and equilibrate for 30 min.
NOTE 2—Accuracy of both time and temperature is critical to valid sample-to-sample comparisons using this test.
9.2 Obtain three
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.