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ASTM D6712-01

(Specification)

Standard Specification for Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) Solid Plastic Shapes

Standard Specification for Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) Solid Plastic Shapes

ABSTRACT
This specification focuses on the classification, and requirements and test methods for the material and properties of solid plastic shapes manufactured from ultra-high-molecular-weight polyethylene (UHMW-PE), both virgin and recycled. The properties included in this specification are those required for the compositions covered and are derived from molded samples or fabricated from sheet, rod and profiles. The mechanical properties for which the materials shall be tested on and shall accordingly adhere to are elongation stress, elongation at break, and Izod impact strength.
SCOPE
1.1 This specification covers requirements and test methods for the material and properties of solid plastic shapes manufactured from UHMW-PE.
1.2 The properties included in this specification are those required for the compositions covered and are derived from molded samples or fabricated from sheet, rod and profiles. Requirements necessary to identify particular characteristics important to specialized applications may be described by using the classification system given in Section .
1.3 This specification allows for the use of recycled plastics (as defined in Guide D 5033).
1.4 The values are stated in SI units and are regarded as the standard in all property tables. For reference purposes, English units are also included in and Table A.
1.5 The following precautionary caveat pertains only to the test method portions of this specification. 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 requirements prior to use.
Note 1—There is no ISO equivalent standard.

General Information

Status
Historical
Publication Date
09-Aug-2001
ICS
83.140.99 - Other rubber and plastics products
Technical Committee
D20 - Plastics
Drafting Committee
D20.15 - Thermoplastic Materials
Current Stage
Ref Project

Relations

Replaced By
ASTM D6712-01(2009) - Standard Specification for Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) Solid Plastic Shapes
Effective Date
01-Feb-2009

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ASTM D6712-01 - Standard Specification for Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) Solid Plastic ShapesASTM D6712-01 - Standard Specification for Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) Solid Plastic Shapes
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ASTM D6712-01 - Standard Specification for Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) Solid Plastic Shapes
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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: D 6712 – 01
Standard Specification for
Ultra-High-Molecular-Weight Polyethylene (UHMW-PE) Solid
Plastic Shapes
This standard is issued under the fixed designation D 6712; 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 (e) indicates an editorial change since the last revision or reapproval.
INTRODUCTION
ThisspecificationisintendedtobeameansofdefiningUltra-High-Molecular-Weight Polyethylene
(UHMW-PE) solid plastic shapes for commercial use.
1. Scope D 883 Terminology Relating to Plastics
D 1600 Terminology for Abbreviated Terms Relating to
1.1 This specification covers requirements and test methods
Plastics
for the material and properties of solid plastic shapes manu-
D 3892 Practice for Packaging/Packing of Plastics
factured from UHMW-PE.
D 4000 Classification System for Specifying Plastic Mate-
1.2 The properties included in this specification are those
rials
required for the compositions covered and are derived from
D 4020 Specification for Ultra-High-Molecular-Weight
molded samples or fabricated from sheet, rod and profiles.
Polyethylene Molding and Extrusion Materials
Requirements necessary to identify particular characteristics
D 5033 Guide for Development of ASTM Standards Relat-
important to specialized applications may be described by
ing to Recycling and Use of Recycled Plastic
using the classification system given in Section 4.
2.2 ISO Standard:
1.3 This specification allows for the use of recycled plastics
ISO 11542-2 Ultra-High-Molecular Weight Polyethylene
(as defined in Guide D 5033).
(PE-UHMW) Moulding Materials—Part 2: Preparation of
1.4 The values are stated in SI units and are regarded as the
Test Specimens and Determination of Properties
standard in all property tables. For reference purposes, English
units are also included in Table S-UHMW-PE and Table A.
3. Terminology
1.5 The following precautionary caveat pertains only to the
3.1 Definitions:
test method portions of this specification. This standard does
3.1.1 For definitions of other technical terms pertaining to
not purport to address all of the safety concerns, if any,
plastics used in this specification, see Terminology D 883,
associated with its use. It is the responsibility of the user of this
D 1600, or Guide D 5033.
standard to establish appropriate safety and health practices
3.2 Definitions of Terms Specific to This Standard:
and determine the applicability of regulatory requirements
3.2.1 additive, n—any material added to the polymer such
prior to use.
as processing aids, stabilizers, and colorants.
NOTE 1—There is no ISO equivalent standard.
3.2.2 recycled-plastic shape, n—a product made from up to
100 % post-consumer material.
2. Referenced Documents
3.2.3 regrind (plastic), n—a product or scrap such as edge
2.1 ASTM Standards:
trim that have been reclaimed by shredding and granulating for
D 618 Practice for Conditioning Plastics for Testing
use in-house.
D 638 Test Method for Tensile Properties of Plastics
3.2.4 rod, n—an extruded solid cylindrical shape with a
minimum diameter of ⁄16 in.
1 3.2.5 sheet, n—flat stock greater than 10 mils thickness.
This specification is under the jurisdiction of ASTM Committee D20 on
3.2.6 solid plastic shape, n—a product of various geom-
Plastics and is the direct responsibility of Subcommittee D20.20 on Plastic Products
(Section D20.20.02) .
etries made up of UHMW-PE, such as sheet, rod, and so forth.
Current edition approved August 10, 2001. Published October 2001.
Ultra High Molecular Weight refers to a polyethylene resin meeting the
requirements of Specification D 4020. Annual Book of ASTM Standards, Vol 08.02.
3 5
Annual Book of ASTM Standards, Vol 08.01. Annual Book of ASTM Standards, Vol 08.03.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6712–01
TABLE S-UHMW-PE Physical Property Requirements for Ultra High Molecular Weight Polyethylene Solid Plastic Shapes
Elongational Stress,
Applicable Izod impact, Test Method Tensile Elongation,
Test Method for
Description Type Class Description Grade Specification Description for D 4020,min,kJ/m Test Method for D 638,
ISO 11542-2 (Annex 1),
Callout (ft-lbs/in. ) % at break, min
min, Mpa
UHMW-PE 01 1 unfilled 1 ASTM D 4020 General purpose 37 (18) >0.20 200
2 see Table A Recycled . . . . . . . . .
0 as specified 1 see Table A General purpose . . . . . . . . .
2 see Table A Recycled . . . . . . . . .
Other UHMW-PE 00 0 . . . 0 . . . . . . . . . . . . . . .
4. Classification and Material
4.1 Product shape and size as defined in the applicable
purchase order.
4.2 This standard covers product as listed in Table
S-UHMW-PE.
4.2.1 The type of UHMW-PE product may be categorized
by grade and type depending on resin and additives present, as
defined in Table S-UHMW-PE.
4.2.2 Every type of UHMW-PE solid plastic shape may be FIG. 1 Callout Designation Layout
categorized into one of two grades as follows:
4.2.2.1 Grade l: General Purpose (Virgin) UHMW-PE—
UHMW-PE solid plastic shapes are made using only 100 % 4.4.1 The system uses pre-defined cells to refer to specific
virgin UHMW polyethylene resin which meets the require- aspects of this specification as illustrated below in Examples
1–3:
ments of Specification D 4020. If appropriate, the resin may
contain additives, such as processing aids, stabilizers and
4.4.2 Example 1—Product made from virgin Type
colorants. Virgin product should not contain materials of UHMW-PE resin.
unknown origin or composition.
CELL CALLOUT: S-UHMW-PE0111
4.2.2.2 Grade 2: Recycled/Regrind UHMW-PE—
where:
UHMW-PE solid plastic shapes are made using any amount up
S-UHMW-PE01 = product made from general purpose
to 100 percent of recycled, or regrind UHMW-PE plastic, or
resin per Table S-UHMW-PE,
both.
1 = unfilled class, and
1 = general purpose.
TABLE A Additional Requirements
...

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1.3 This classification system and subsequent line call out (specification) are intended to provide a means of calling out plastic materials used in the fabrication of end items or parts. It is not intended for the selection of materials. Material selection can be made by those having expertise in the plastic field only after careful consideration of the design and performance required of the part, environment to which it will be exposed, fabrication process to be employed, costs involved, and inherent properties of the material other than those covered by this classification system.  
1.4 The values stated in SI units are to be regarded as standard.  
1.5 The following safety hazards caveat pertains only to the test method portion, Section 12, of this classification system. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: There is no known ISO equivalent to this standard.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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ASTM
ASTM D7258-23(Specification)
Standard Specification for Polymeric Piles

ABSTRACT
This specification establishes the physical and performance requirements for round and rectangular cross-section polymeric piles in axial and lateral load-bearing applications including, by not limited to, marine, waterfront, and corrosive environments. It does not apply to individual polymeric pile products, sheet piles, and other mechanically connected polymeric pile products using inter-locking systems. Covered here are six types of polymeric piles that are fabricated from materials that may be virgin, recycled, or both, as long as the finished product meets all of the criteria specified herein. These types are: Type I, polymeric only; Type II, polymeric with reinforcement in the form of chopped, milled or continuous fiber or mineral; Type III, polymeric with reinforcement in the form of metallic bars, cages, or shapes; Type IV, polymeric with reinforcement in the form of non-metallic bars or cages; Type V, polymeric composite tube with a concrete core; and Type VI, any other polymeric piling meeting the requirements stated herein and not otherwise described by Types I through V. The polymeric tiles shall adhere to specified physical attributes such as size, cross-sectional shape, length, straightness, placement of reinforcement, and surface conditions. The performance requirements which pile specimens shall conform to include creep rupture, serviceability, flexural properties, shear strength, bearing strength, design flexural stiffness, energy absorption, compressive strength, combined stresses, dimensional stability (thermal expansion), hygrothermal cycling, and flame spread index.
SCOPE
1.1 This specification addresses the use of round and rectangular cross-section polymeric piles in axial and lateral load-bearing applications, including but not limited to marine, waterfront, and corrosive environments.  
1.2 This specification is only applicable to individual polymeric pile products. Sheet pile and other mechanically connected polymeric pile products using inter-locking systems, are not part of this specification.  
1.3 The piling products considered herein are characterized by the use of polymers, whereby (1) the pile strength or stiffness requires the inclusion of the polymer, or (2) a minimum of fifty percent (50 %) of the weight or volume is derived from the polymer. The type classifications of polymeric piles described in Section 4 show how they can be reinforced by composite design for increased stiffness or strength.  
1.4 This specification covers polymeric piles fabricated from materials that are virgin, recycled, or both, as long as the finished product meets all of the criteria specified herein. Diverse types and combinations of inorganic filler systems are permitted in the manufacturing of polymeric piling products. Inorganic fillers include such materials as talc, mica, silica, wollastonite, calcium carbonate, etc. Pilings are often placed in service where they will be subjected to continuous damp or wet exposure conditions. Due to concerns of water sensitivity and possible affects on mechanical properties in such service conditions, organic fillers, including lignocellulosic materials such as those made or derived from wood, wood flour, flax shive, rice hulls, wheat straw, and combinations thereof, are not permitted in the manufacturing of polymeric piling products.  
1.5 The values are stated in inch-pound units as these are currently the most common units used by the construction industry.  
1.6 Polymeric piles under this specification are designed using design stresses determined in accordance with Test Methods D6108, D6109, and D6112 and procedures contained within this specification unless otherwise specified.  
1.7 Although in some instances it will be an important component of the pile design, frictional properties are currently beyond the scope of this document.  
1.8 Criteria for design are included as part of this specification for polymeric piles. Certain Types and...

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ASTM
ASTM D7486-22(Test Method)
Standard Test Method for Measurement of Fines and Dust Particles on Plastic Pellets by Wet Analysis

SIGNIFICANCE AND USE
5.1 Molding and extruding plastic pellets require dust free, dry pellets to prevent processing problems. Plastic producers try to remove the dust and streamers with dust removal systems prior to packaging and loading. How to accurately measure dust and streamer content in plastic pellets is an important quality control issue.  
5.2 Particle size analysis is used to determine a percentage of particle size distribution from a representative sample of the whole. In terms of size analysis concerning plastic pellets, sieving is used to determine the dust content in the range of 500 to 2000 micron. Test Method D1921, Test Method B, is used to determine this type of particle sizing.  
5.3 After dry sieve analysis, particles smaller than 500 microns need to be analyzed by wet method. A fresh sample shall be used for wet analysis. This test method allows washing down the fines attached to the pellets by electrostatic forces.  
5.4 The wet analysis provides accurate quantification of small to large amounts of fines, negating static effects, and eliminating detrimental effects of mechanical agitation. A wet analysis must be employed to accurately quantify lower PPM dust levels in plastic pellets.
SCOPE
1.1 This test method measures the amount of fine particles adhered on plastic pellets or granules in which they are commonly produced and supplied. The lower limit of this test method is restricted only by the porosity of the filter disc used to capture the particle size being quantified.  
1.2 The wet analysis technique allows for separation and collection of statically charged particles by liquid wash and filtration methods. This must be performed under standard laboratory conditions.  
1.3 The values stated in SI units are to be regarded as standard.  
1.4 This test method describes an essential practice to check the quality of plastics once the production cycle is terminated and to evaluate the performance of pellet cleaning systems or of the special pneumatic conveying systems for the distinct size fractions below 500 micron only.  
1.5 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: There is no known ISO equivalent to this standard.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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