ASTM D3641-14

Standard Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials

SIGNIFICANCE AND USE
5.1 It is well known that plastic test specimens molded under different conditions can have significantly different properties. This practice is designed to minimize those differences by establishing operating protocols without being unnecessarily restrictive.  
5.2 Always refer to the ASTM material specification or ISO designation for the material for recommended molding conditions. If not available, consult the material supplier.  
5.3 This practice requires the use of adequate quantities of plastic material to find desirable operating conditions and to make the desired test specimens.
SCOPE
1.1 This practice covers the general principles to be followed when injection molding test specimens of thermoplastic molding and extrusion materials. This practice is to be used to obtain uniformity in methods of describing the various steps of the injection molding process and to set up uniform methods of reporting these conditions. The exact conditions required to prepare suitable specimens will vary for each plastic material. Any requirements or recommendations in the material specification that differ from this standard take precedence over those in this standard. Always consult the referenced material document for specimen preparation. If no referenced document exists, then consult the material supplier for specimen preparation guidance and note such in the test report.  
1.2 The methodology presented assumes the use of reciprocating screw injection molding machines.  
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
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. Note 1—This practice is equivalent to the following parts of ISO 294: Plastics—Injection Moulding of Test Specimens of Thermoplastic Materials; 294-1: Part 1—General Principles and Multipurpose Test Specimens (ISO Type A Mould) and Bars (ISO Type B Mould); ISO 294-2: Part 2—Small Tensile Bars (ISO Type C Mould); ISO 294-3: Part 3—Plates (ISO Type D Moulds).

General Information

• Status: Historical
• Publication Date: 28-Feb-2014
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.09 - Specimen Preparation

Relations

• Replaces: ASTM D3641-12 - Standard Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials
• Effective Date: 01-Mar-2014
• Referred By: ASTM D5990-20a - Standard Classification System and Basis for Polyketone Injection Molding and Extrusion Materials (PK)
• Effective Date: 01-Mar-2014
• Referred By: ASTM D787-18 - Standard Specification for Ethyl Cellulose Molding and Extrusion Compounds
• Effective Date: 01-Mar-2014
• Referred By: ASTM D5204-22 - Standard Classification System and Basis for Specification for Polyamide-Imide (PAI) Molding and Extrusion Materials
• Effective Date: 01-Mar-2014
• Referred By: ASTM D4203-17 - Standard Specification for and Basis for Specifications for Styrene-Acrylonitrile (SAN) Injection and Extrusion Materials
• Effective Date: 01-Mar-2014
• Referred By: ASTM D5592-94(2018) - Standard Guide for Material Properties Needed in Engineering Design Using Plastics
• Effective Date: 01-Mar-2014
• Referred By: ASTM D8033-22 - Standard Classification System for Poly(Ether Ether Ketone) (PEEK) Molding and Extrusion Materials
• Effective Date: 01-Mar-2014
• Referred By: ASTM D256-23e1 - Standard Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics
• Effective Date: 01-Mar-2014
• Referred By: ASTM D4101-17e1 - Standard Classification System and Basis for Specification for Polypropylene Injection and Extrusion Materials
• Effective Date: 01-Mar-2014
• Referred By: ASTM D6358-19e1 - Standard Classification System and Basis for Specification for Poly (Phenylene Sulfide) (PPS) Injection Molding, Extrusion and Blow Molding Materials Using ISO Methods
• Effective Date: 01-Mar-2014
• Referred By: ASTM F2617-15 - Standard Test Method for Identification and Quantification of Chromium, Bromine, Cadmium, Mercury, and Lead in Polymeric Material Using Energy Dispersive X-ray Spectrometry
• Effective Date: 01-Mar-2014
• Referred By: ASTM D707-15(2023) - Standard Classification System and Basis for Specification for Cellulose Acetate Butyrate Molding and Extrusion Compounds (CAB)
• Effective Date: 01-Mar-2014
• Referred By: ASTM D5138-23 - Standard Classification System and Basis for Specification for Liquid Crystal Polymers Molding and Extrusion Materials (LCP)
• Effective Date: 01-Mar-2014
• Referred By: ASTM D8156-18 - Standard Classification System for and Basis of Specifications for Thermoplastic Elastomer Copolyester Molding and Extrusion Materials (TPC)
• Effective Date: 01-Mar-2014
• Referred By: ASTM D6394-21a - Standard Classification System for and Basis for Specification for Sulfone Plastics (SP)
• Effective Date: 01-Mar-2014

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: D3641 − 14
StandardPractice for
Injection Molding Test Specimens of Thermoplastic Molding
1
and Extrusion Materials
This standard is issued under the fixed designation D3641; 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* D256 Test Methods for Determining the Izod Pendulum
Impact Resistance of Plastics
1.1 This practice covers the general principles to be fol-
D570 Test Method for Water Absorption of Plastics
lowed when injection molding test specimens of thermoplastic
D638 Test Method for Tensile Properties of Plastics
molding and extrusion materials. This practice is to be used to
D648 Test Method for Deflection Temperature of Plastics
obtain uniformity in methods of describing the various steps of
Under Flexural Load in the Edgewise Position
theinjectionmoldingprocessandtosetupuniformmethodsof
D790 Test Methods for Flexural Properties of Unreinforced
reporting these conditions. The exact conditions required to
and Reinforced Plastics and Electrical Insulating Materi-
prepare suitable specimens will vary for each plastic material.
als
Any requirements or recommendations in the material specifi-
D883 Terminology Relating to Plastics
cation that differ from this standard take precedence over those
D955 Test Method of Measuring Shrinkage from Mold
in this standard. Always consult the referenced material docu-
Dimensions of Thermoplastics
ment for specimen preparation. If no referenced document
D957 Practice for Determining Surface Temperature of
exists, then consult the material supplier for specimen prepa-
Molds for Plastics
ration guidance and note such in the test report.
3
2.2 ISO Standards:
1.2 The methodology presented assumes the use of recipro-
ISO 3167 Plastics—Preparation and Use of Multipurpose
cating screw injection molding machines.
Test Specimens
1.3 The values stated in SI units are to be regarded as the
ISO 294-1: Plastics—Injection Moulding of Test Specimens
standard. The values given in parentheses are for information
of Thermoplastic Materials—Part 1: General Principles
only.
and Multipurpose Test Specimens (ISO Type A Mould)
1.4 This standard does not purport to address all of the and Bars (ISO Type B Mould)
safety concerns, if any, associated with its use. It is the ISO 294-2: Plastics—Injection Moulding of Test Specimens
responsibility of the user of this standard to establish appro- of Thermoplastic Materials—Part 2: Small Tensile Bars
priate safety and health practices and determine the applica- (ISO Type C Mould)
bility of regulatory limitations prior to use. ISO 294-3: Plastics—Injection Moulding of Test Specimens
of Thermoplastic Materials—Part 3: Plates (ISO Type D
NOTE 1—This practice is equivalent to the following parts of ISO 294:
Moulds)
Plastics—Injection Moulding of Test Specimens of Thermoplastic Mate-
rials; 294-1: Part 1—General Principles and MultipurposeTest Specimens
(ISO Type A Mould) and Bars (ISO Type B Mould); ISO 294-2: Part 3. Terminology
2—Small Tensile Bars (ISO Type C Mould); ISO 294-3: Part 3—Plates
3.1 Definitions—Definitions of terms applying to this prac-
(ISO Type D Moulds).
tice appear in Terminology D883.
2. Referenced Documents
3.2 Definitions of Terms Specific to This Standard:
2
2.1 ASTM Standards: 3.2.1 average injection velocity, n—the mean value of the
velocity of the molten plastic flow front within a cavity during
the injection time that is calculated from the shot volume and
1
ThispracticeisunderthejurisdictionofASTMCommitteeD20onPlasticsand
injection time. (See Terminology D883.)
is the direct responsibility of Subcommittee D20.09 on Specimen Preparation.
3.2.1.1 Discussion—The average injection velocity is calcu-
Current edition approved March 1, 2014. Published March 2014. Originally
lated as follows:
approved 1991. Last previous edition approved 2012 as D3641 – 12. DOI: 10.1520/
D3641-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*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 ----------------------
D3641 − 14
V 5.2 Always refer to theASTM material specification or ISO
s
V 5
av
T 3A 3n designation for the material for re
...

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: D3641 − 12 D3641 − 14
Standard Practice for
Injection Molding Test Specimens of Thermoplastic Molding
1
and Extrusion Materials
This standard is issued under the fixed designation D3641; 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 the general principles to be followed when injection molding test specimens of thermoplastic molding
and extrusion materials. This practice is to be used to obtain uniformity in methods of describing the various steps of the injection
molding process and to set up uniform methods of reporting these conditions. The exact conditions required to prepare suitable
specimens will vary for each plastic material. Any requirements or recommendations in the material specification whichthat differ
from this standard take precedence over those in this standard. Always consult the referenced material document for specimen
preparation. If no referenced document exists, then consult the material supplier for specimen preparation guidance and note such
in the test report.
1.2 The methodology presented assumes the use of reciprocating screw injection molding machines.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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.
NOTE 1—This practice is equivalent to the following parts of ISO 294: Plastics—Injection Moulding of Test Specimens of Thermoplastic Materials;
294-1: Part 1—General Principles and Multipurpose Test Specimens (ISO Type A Mould) and Bars (ISO Type B Mould); ISO 294-2: Part 2—Small
Tensile Bars (ISO Type C Mould); ISO 294-3: Part 3—Plates (ISO Type D Moulds).
2. Referenced Documents
2
2.1 ASTM Standards:
D256 Test Methods for Determining the Izod Pendulum Impact Resistance of Plastics
D570 Test Method for Water Absorption of Plastics
D638 Test Method for Tensile Properties of Plastics
D648 Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D790 Test Methods for Flexural Properties of Unreinforced and Reinforced Plastics and Electrical Insulating Materials
D883 Terminology Relating to Plastics
D955 Test Method of Measuring Shrinkage from Mold Dimensions of Thermoplastics
D957 Practice for Determining Surface Temperature of Molds for Plastics
3
2.2 ISO Standards:
ISO 3167 Plastics—Preparation and Use of Multipurpose Test Specimens
ISO 294-1: Plastics—Injection Moulding of Test Specimens of Thermoplastic Materials—Part 1: General Principles and
Multipurpose Test Specimens (ISO Type A Mould) and Bars (ISO Type B Mould)
ISO 294-2: Plastics—Injection Moulding of Test Specimens of Thermoplastic Materials—Part 2: Small Tensile Bars (ISO Type
C Mould)
ISO 294-3: Plastics—Injection Moulding of Test Specimens of Thermoplastic Materials—Part 3: Plates (ISO Type D Moulds)
1
This practice is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.09 on Specimen Preparation.
Current edition approved April 15, 2012March 1, 2014. Published May 2012March 2014. Originally approved 1991. Last previous edition approved 20102012 as
D3641 – 10D3641 – 12.A. DOI: 10.1520/D3641-12.10.1520/D3641-14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
*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 ----------------------
D3641 − 14
3. Terminology
3.1 Definitions—Definitions of terms applying to this practice appear in Terminology D883.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 average injection velocity, n—the mean value of the ve
...