ASTM D6100-97

Standard Specification for Extruded, Compression Molded and Injection Molded Acetal Shapes (POM)

SCOPE
1.1 This specification covers requirements and test methods for the material, dimensions, and workmanship, and the properties of extruded, compression molded and injection molded acetal sheet, plate, rod, and tubular bar manufactured from acetal.

General Information

• Status: Historical
• Publication Date: 09-Apr-1997
• ICS: 71.080.10 - Aliphatic hydrocarbons
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Relations

• Replaced By: ASTM D6100-03 - Standard Specification for Extruded, Compression Molded and Injection Molded Acetal Shapes (POM)
• Effective Date: 10-Jul-2003
• Referred By: ASTM F792-17e1 - Standard Practice for Evaluating the Imaging Performance of Security X-Ray Systems
• Effective Date: 10-Apr-1997
• Referred By: ASTM D6778-20 - Standard Classification System and Basis for Specification for Polyoxymethylene Molding and Extrusion Materials (POM)
• Effective Date: 10-Apr-1997

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 6100 – 97
Standard Specification for
Extruded, Compression Molded and Injection Molded Acetal
Shapes (POM)
This standard is issued under the fixed designation D 6100; 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
This specification is intended to be a means of calling out plastic product used in the fabrication of
end items or parts.
1. Scope D 638 Test Method for Tensile Properties of Plastics
D 790 Test Methods for Flexural Properties of Unreinforced
1.1 This specification covers requirements and test methods
and Reinforced Plastics and Electrical Insulating Materi-
for the material, dimensions, and workmanship, and the prop-
als
erties of extruded, compression molded and injection molded
D 883 Terminology Relating to Plastics
acetal sheet, plate, rod, and tubular bar manufactured from
D 3892 Practice for Packaging/Packing of Plastics
acetal.
D 4000 Classification System for Specifying Plastic Mate-
1.2 The properties included in this specification are those
rials
required for the compositions covered. Requirements neces-
D 4181 Classification for Acetal (POM) Molding and Ex-
sary to identify particular characteristics important to special-
trusion Materials
ized applications may be described by using the classification
D 5033 Guide for the Development of Standards Relating to
system given in Section 4.
the Proper Use of Recycled Plastics
1.3 This specification allows for the use of recycled plastics
2.2 ANSI Standard:
as defined in Guide D 5033.
Z1.4-1993 Sampling Procedures and Tables for Inspection
1.4 The values stated in inch-pound units are to be regarded
by Attributes
as the standard in all property and dimensional tables. For
reference purposes, SI units are included in Table S-POM and
3. Terminology
Table 1 only.
3.1 Definitions:
1.5 The following precautionary caveat pertains only to the
3.1.1 regrind (plastic), n—a product or scrap such as sprues,
test method portions, Section 11, of this specification: This
runners and edge trim that have been reclaimed by shredding
standard does not purport to address all of the safety concerns,
and granulating for use in-house.
if any, associated with its use. It is the responsibility of the user
3.1.2 For definitions of other technical terms pertaining to
of this standard to establish appropriate safety and health
plastics used in this specification, see Terminology D 883 or
practices and determine the applicability of regulatory limita-
Guide D 5033.
tions prior to use.
3.2 Definitions of Terms Specific to This Standard:
NOTE 1—There is no similar or equivalent ISO Standard.
3.2.1 centerline porosity, n—microvoids which are visibly
detectable with the unaided eye using the dye penetration
2. Referenced Documents
procedure detailed in 7.4.1.
2.1 ASTM Standards:
3.2.2 low porosity, n—product which either exhibits no
D 256 Test Methods for Determining the Pendulum Impact
white centerline or a white centerline but no dye remains when
Resistance of Notched Specimens of Plastics
tested in accordance with section 7.4.1.
D 618 Practice for Conditioning Plastics for Testing
3.2.3 plate, n—flat stock greater than ⁄4 in.
3.2.4 Porosity Level 1, n—products containing microvoids
with a pore size greater than 50 um (0.002 in.) in which dye
This specification is under the jurisdiction of ASTM Committee D-20 on
Plastics and is the direct responsibility of Subcommittee D20.20 on Plastic Products
(Section D20.20.02). Annual Book of ASTM Standards, Vol 08.02.
Current edition approved April 10, 1997. Published May 1998. Annual Book of ASTM Standards, Vol 08.03.
2 6
As defined in Guide D 5033. Available from American National Standards Institute, 11 W. 42nd St., 13th
Annual Book of ASTM Standards, Vol 08.01. Floor, New York, NY 10036.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D6100–97
remains either in a broken or continuous line which does not 3.2.8 tubular bar, n—annular shapes with minimum inside
3 1
exceed 4 % centerline porosity when tested in accordance with
diameter of ⁄8 in. and minimum wall thickness of ⁄16in.
7.4.1.
3.2.9 virgin plastic shape, n—product that is produced from
3.2.5 recycled plastic shape, n—a product made from up to
100 % plastic resin that has not been subjected to subsequent
100 % recycled plastic.
melt processing.
3.2.6 rod, n—solid cylindrical shape with a minimum di-
ameter of ⁄8 in.
3.2.7 sheet, n—flat stock less than and including ⁄4 in. (mm)
thickness.
TABLE S-POM Requirements for Acetal (Polyoxymethylene) Shapes
Ultimate
Tensile Tensile Dimensional
Tensile
Specification D 4181 Elongation Modulus Stability
Type Description Class Description Grade Description Strength
A
Resin Callout % at break, min, %,
min, psi
mm psi max
(MPa)
B
01 Homopolymer 1 Unfilled 1 POM 111 General Purpose 9000 (62) 25 350 000 0.4
B
2 POM110B44350 General Purpose 9000 (62) 15 350 000 0.4
0 As Specified Recycle Grade 8000 (55) 25 275 000 0.4
As Specified . . . . . . . . . . . . . . .
B
2 Lubricated 1 POM110L20A21720 General purpose 6100 (42) 10 345 000 0.4
B
3 Lubricated 2 POM110L13 General Purpose 6800 (47) 10 340 000 0.4
(PTFE filled)
4 Lubricated 3 POM110L20A991 General Purpose 5500 (38) 10 325 000 0.4
B
(PTFE filled) 20(46)(2400)
B
5 Lubricated 4 POM 110L12 General Purpose 5800 (40) 5 375 000 0.4
Bearing grade
B
02 Copolymer 1 Unfilled 1 POM 211 General Purpose 8000 (55) 25 350 000 0.4
2 Recycle Grade 7000 (48) 25 275 000 0.4
0 As Specified . . . . . . . . . . . . . . .
00 Other Acetals 0 As Specified 1 As Specified General Purpose . . . . . . . . . . . .
2 Recycle Grade . . . . . . . . . . . .
A
Applicable Specification D 4181 resin type to be specified on purchase order.
B
In accordance with Specification D 4181.
4. Classification and Material 4.3.2 Grade 2—Recycle Grade:
4.3.2.1 Extruded, compression molded or injection molded
4.1 Product shape and size as defined in the applicable
product made using any amount up to 100 % of recycled acetal
purchase order.
plastic.
4.2 This specification covers product as listed in Table
4.4 The type class and grade is further differentiated based
S-POM. Products included in the designations reference Speci-
on dimensional stability (elevated temperature excursion test),
fication D 4181 callouts where applicable.
Table S-POM and dimensional requirements, Tables A and B.
4.2.1 The type of acetal extruded, compression molded or
4.4.1 When the level of centerline porosity needs to be
injection molded product may be categorized by type, grade
documentated it will be designated as either low porosity (LP)
and class depending on resin and filler compositions as defined
or P1 (Porosity Level 1) that is determined using the procedure
in Table S-POM.
detailed in 7.4 and will be added to the callout as a suffix (see
4.3 Every type of acetal shape may be categorized into one
Example 2 in 4.6.1.2).
of several grades as follows:
4.5 Property Tables:
4.3.1 Grade 1—General Purpose:
4.5.1 Table S-POM may be used to describe extruded,
4.3.1.1 Extruded, compression molded and injection
compression molded and injection molded products.
molded product made using only 100 % virgin acetal resin.
4.5.2 Table 1 may also be used to describe extruded,
4.3.1.2 Up to 20 % acetal regrind plastic developed during
compression molded and injection molded products not in-
the internal processing steps, may be reused for sheet product.
cluded in Table S-POM via a cell callout which includes the
applicable Table S-POM acetal type and specific properties
TABLE A-1 Dimensional Requirements for Acetal Rod (Grade 1)
(Designations 1 through 7).
Diameter Tolerance, Roundness Camber, in./
Size, in. 4.5.3 To facilitate the incorporation of future or special
in. TIR, in. ft
materials not covered by Table S-POM , the “as specified”
1 7 1
⁄8 to ⁄8 +0.002/–0.001 0.002 2 ⁄2/8
category (OO) for type, class and grade is shown on the table
1 +0.005/–0 0.002 1 ⁄4/8
1 1 1
1 ⁄8 to 1 ⁄4 +0.005/–0 0.004 1 ⁄4/8 with the basic properties to be obtained from Table 1, as they
3 7 1
1 ⁄8 to 1 ⁄8 +0.005/–0 0.005 1 ⁄4/8
apply.
2 +0.005/–0 0.010 1 ⁄4/8
1 1 1 4.5.4 Reinforcements and Additive Materials—A symbol
2 ⁄8 to 2 ⁄2 +0.030/–0 0.025 1 ⁄4/8
2 ⁄8 to 6 +0.250/–0 0.050 1/8
(single-letter) will be used for the major reinforcement or
Over 6 +0.250/–0 0.060 ⁄4/4
combination, or both, along with two numbers that indicate the
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
D6100–97
percentage of addition by mass with the tolerances as tabulated 1 1 1
1 ⁄8 to 3 +0.050/–0 ⁄4/4 ⁄16/2
1 1 1
below. This must be included in all Table 1 callouts (see 3 ⁄8 and over +0.125/–0 ⁄4/4 ⁄8/2
A
Example 3 in 4.6.1.3). Compression molded plate is supplied sufficiently oversize to finish to nominal
dimension listed.
Tolerance
Symbol Material (Based on the Total Mass)
TABLE B-2 Dimensional Requirements for Acetal Compression
C Carbon and graphite fiber 62%
Molded Plates (Grade 1)
G Glass 62%
Length Camber,
L Lubricants (for example, by agreement between the
Size in. Thickness Tolerances Width Bow, in./ft
in./ft
PTFE, graphite, silicone supplier and the user
1 3
and molybdenum disulfide)
⁄4 +0.090/–0 ⁄8/4 0.090/2
5 3
M Mineral 62%
⁄16 +0.090/–0 ⁄8/4 0.090/2
3 3
R Combinations of reinforcements 63 % for the total reinforcement
⁄8 +0.090/–0 ⁄8/4 0.090/2
7 3
or fillers, or both
⁄16 +0.090/–0 ⁄8/4 0.090/2
1 3
⁄2 +0.090/–0 ⁄8/4 0.090/2
5 3
4.6 Callout Designation—A one-line system shall be used
⁄8 +0.090/–0 ⁄8/4 0.090/2
3 3
⁄4 +0.090/–0 ⁄8/4 0.090/2
to specify acetal materials covered by this specification. The
7 3
⁄8 +0.090/–0 ⁄8/4 0.090/2
system uses pre-defined cells to refer to specific aspects of this
1 +0.090/–0 ⁄8/4 0.050/2
1 1
specification as illustrated below:
1 ⁄8 +0.090/–0 ⁄8/4 0.050/2
1 1
1 ⁄4 +0.090/–0 ⁄8/4 0.050/2
4.6.1 Description:
3 1
1 ⁄8 +0.090/–0 ⁄8/4 0.050/2
4.6.1.1 Example 1—Product made from general purpose 1 1
1 ⁄2 +0.090/–0 ⁄8/4 0.050/2
5 1
1 ⁄8 +0.090/–0 ⁄8/4 0.050/2
acetal homopolymer:
3 1
1 ⁄4 +0.090/–0 ⁄8/4 0.050/2
CELL CALLOUT: S-POM0111
7 1
1 ⁄8 +0.090/–0 ⁄8/4 0.050/2
2 +0.090/–0 ⁄8/4 0.050/2
S-POM01 = Product made from POM homopolymer in accordance with
Table S-POM
5. Physical Property Requirements
1 = Unfilled class
1 = General purpose grade product
5.1 The physical property values listed within this specifi-
cation’s tables are to be considered minimum specification
4.6.1.2 Example 2—Product made from general purpose
values. Any requirement for specific test data for a given
acetal copolymer, low porosity:
production lot should be specified at the time of order. Physical
CELL CALLOUT: S-POM0211,LP
properties for products not yet included in Table S-POM may
S-POM02 = Product made from POM copolymer in accordance with
be specified using Table 1 for extruded, compression molded
Table S-POM
and injection molded products.
1 = Unfilled class
1 = General purpose grade product
6. Dimensional Requirements
LP = Low porosity material
6.1 The type, class and grade is further differentiated based
4.6.1.3 Example 3—Product made from 20 % PTFE rein-
on dimensional stability (elevated temperature excursion test),
forced general purpose acetal homopolymer resin:
Table S-POM, and dimensional requirements, Tables A and B.
CELL CALLOUT: S-POM0121
Products shall be produced within commercial tolerances and
S-POM01 = Product made from POM homopolymer in accordance with with the lowest stress levels for machined parts as delineated in
Table S-POM
Tables A and B for extruded, compression molded or injection
2 = Lubricated
molded products. The manner in which the tolerences are
1 = PTFE filled
obtained is not relevant.
4.6.2 The three examples illustrate how a one-line, alpha-
6.2 Tubular bar dimensions shall be supplied in the unfin-
numeric sequence can identify the product composition, com-
ished condition, unless otherwise specified at time of order,
mercial parameters and physical characteristics of extruded,
sufficient to finish to the nominal dimension ordered.
compression molded and injection molded product. A space
6.3 The maximum allowable camber and/or bow shall be
must be used as a separator between the specification number
within the limits referenced in Tables A-1 and B-1.
and the type designation. No separators are needed between
7. Workmanship, Finish, and Appearance
type, class and grade. When special notes are to be included,
such information should be preceded by a comma. Special
7.1 Appearance—The color of products shall be as pub-
tolerances must be noted at time of order and are inserted after
lished by the shapes manufacturer. They shall be uniform in
the grade in parenthesis and preceded by a comma.
color throughout the thickness. Specific colors and color
matching only as agreed to by order. Physical properties may
TABLE B-1 Dimensional Requirements for Acetal Sheets and
be affected by colors.
A
Plates (Grades 1 and 2)
7.2 Finish—All products shall be free of blisters, wrinkles,
cracks, gouges and defects that restrict commercial use of the
NOTE 1—Squareness—All sizes ⁄8 in. max, gap when measured in
accordance with 11.4.
product. Special surface finish shall be supplied only when
specified in the purchase order or contract.
Length Camber,
Size, in. Thickness Tolerances Width Bow, in./ft
in./ft
7.3 Defects—All products shall be free of dirt, foreign
1 3 3 3
⁄16 to ⁄16 610 % ⁄4/4 ⁄16/2
material and embedded particles exceeding ⁄32 in. maximum
1 3 3
⁄4 to 1 +0.025/–0 ⁄4/4 ⁄16/2
diameter as defined in 7.3.1.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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D6100–97
7.3.1 The criteria for determining the internal cleanliness
shall be external visual inspection. A maximum number of two
internal defects per square foot of plate/sheet and one foot
length of rod and tubular bar. Clusters of defects less than
⁄32in. diameter are to be counted as a single defect.
7.4 Centerline Porosity—Maximum allowable porosity
level for products designated as porosity Level 1 shall not
exceed 4 % as described in 7.4.1. Products
...