ASTM D787-09

Standard Specification for Ethyl Cellulose Molding and Extrusion Compounds

ABSTRACT
This specification covers the standard requirements for plasticized ethyl cellulose thermoplastic compounds suitable for injection molding and extrusion. It does not however include special materials compounded for special applications. Materials shall be ethyl cellulose plastics in the form of pellets with uniform size and composition and may contain colorants in nominal amounts. Test specimens shall conform to the following physical property requirements: unpigmented specific gravity; Rockwell hardness; tensile strength; impact strength; deflection temperature; water absorption; and weight loss on heating.
SCOPE
1.1 This specification covers requirements for plasticized ethyl cellulose thermoplastic compounds suitable for injection molding and extrusion. It does not include special materials compounded for special applications.
1.2 The values stated in SI units are to be regarded as standard. The English values given are for information only.
1.3 The following precautionary statement pertains only to the Test Methods portion, Section 10 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 limitations prior to use.  
Note 1—There is no known ISO equivalent to this specification.

General Information

• Status: Historical
• Publication Date: 31-Aug-2009
• ICS: 83.140.99 - Other rubber and plastics products
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.15 - Thermoplastic Materials

Relations

• Replaces: ASTM D787-96(2003) - Standard Specification for Ethyl Cellulose Molding and Extrusion Compounds
• Effective Date: 01-Sep-2009
• Replaced By: ASTM D787-12 - Standard Specification for Ethyl Cellulose Molding and Extrusion Compounds
• Effective Date: 01-Aug-2012
• Referred By: ASTM D4000-23 - Standard Classification System for Specifying Plastic Materials
• Effective Date: 01-Sep-2009

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D787 −09
StandardSpecification for
1
Ethyl Cellulose Molding and Extrusion Compounds
This standard is issued under the fixed designation D787; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope* D3641Practice for Injection Molding Test Specimens of
Thermoplastic Molding and Extrusion Materials
1.1 This specification covers requirements for plasticized
D3892Practice for Packaging/Packing of Plastics
ethyl cellulose thermoplastic compounds suitable for injection
molding and extrusion. It does not include special materials
3. Terminology
compounded for special applications.
3.1 Terms in this specification are in accordance with
1.2 The values stated in SI units are to be regarded as
Terminology D883.
standard. The English values given are for information only.
4. Classification
1.3 The following precautionary statement pertains only to
theTest Methods portion, Section 10 of this specification. This 4.1 Thisspecificationcoverstwotypesandelevengradesof
standard does not purport to address all of the safety concerns,
ethyl cellulose molding and extrusion compounds as classified
if any, associated with its use. It is the responsibility of the user in accordance with Table 1. Type I materials are general
of this standard to establish appropriate safety and health
purpose and Type II are characterized by improved resistance
practices and determine the applicability of regulatory limita- to impact, especially at low temperatures. The grades are
tions prior to use.
classified in accordance with their physical properties as
specified in Table 1.
NOTE 1—There is no known ISO equivalent to this specification.
5. Ordering Information
2. Referenced Documents
5.1 Purchase orders for, or inquiries about, the materials
2
2.1 ASTM Standards:
described in this specification shall identify the following:
D256Test Methods for Determining the Izod Pendulum
5.1.1 The number of this specification and the required type
Impact Resistance of Plastics
and grade chosen from Table 1, for example, D787 Type 1,
D570Test Method for Water Absorption of Plastics
Grade 1.
D618Practice for Conditioning Plastics for Testing
5.1.2 Supplementary requirements in accordance with this
D638Test Method for Tensile Properties of Plastics
specification if necessary.
D648Test Method for Deflection Temperature of Plastics
5.1.3 Color and opacity within the limits defined in 6.4.
Under Flexural Load in the Edgewise Position
5.1.4 Particle form and size if choice is available.
D785Test Method for Rockwell Hardness of Plastics and
5.1.5 Suchotherrequirementsasmaybeagreedbetweenthe
Electrical Insulating Materials
seller and the purchaser.
D792Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
6. Materials and Manufacture
D883Terminology Relating to Plastics
6.1 Materialssuppliedunderthisspecificationshallbeethyl
D1505Test Method for Density of Plastics by the Density-
cellulose plastics in the form of pellets unless otherwise
Gradient Technique
specified.
6.2 Material supplied in these forms shall be as uniform in
1
This specification is under the jurisdiction of ASTM Committee D20 on
composition and size and as free of contamination as can be
Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic
achieved by good manufacturing practice.
Materials.
Current edition approved Sept. 1, 2009. Published September 2009. Originally
6.3 These materials may contain colorants in the nominal
approved in 1944. Last previous edition approved in 2003 as D787–96(2003).
amountsordinarilyemployed,butsuchadditivesshallnotalter
DOI: 10.1520/D0787-09.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or the ability of the materials to meet the specified properties.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
6.4 The color and transparency or opacity of items fabri-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cated under the conditions recommended by the manufacturer
*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

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D787−09
TABLE 1 Detailed Requirements for Molded Test Specimens
6
NOTE 1—ft·lbf/in.×53.3378660=joules per metre. Megapascals (MPa)=newtons×10 per metre squared.
Type I Type II
Test
Property
Grade Grade Grade Grade Grade Grade
...

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:D787–96 (Reapproved 2003) Designation: D 787 – 09
Standard Specification for
1
Ethyl Cellulose Molding and Extrusion Compounds
This standard is issued under the fixed designation D 787; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope*
1.1 This specification covers requirements for plasticized ethyl cellulose thermoplastic compounds suitable for injection
molding and extrusion. It does not include special materials compounded for special applications.
1.2 The values stated in SI units are to be regarded as the standard. The English values given in parentheses are for information
only.
1.3 The following precautionary statement pertains only to the Test Methods portion, Section 10 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 limitations prior
to use.
NOTE1—There is no equivalent or similar ISO standard. 1—There is no known ISO equivalent to this specification.
2. Referenced Documents
2
2.1 ASTM Standards:
D 256 Test Methods for Determining the Pedulum Impact Resistance of Notched Specimens of Plastics
2
D569Test Method for Measuring the Flow Properties of Thermoplastic Molding Materials Test Methods for Determining the
Izod Pendulum Impact Resistance of Plastics
D 570 Test Method for Water Absorption of Plastics
D 618 Practice for Conditioning Plastics for Testing
D 638 Test Method for Tensile Properties of Plastics
2
D 648 Test Method for Deflection Temperature of Plastics Under Flexural Load
D759Practice for Conducting Physical Property Tests of Plastics at Subnormal and Supernormal Temperatures Test Method for
Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D 785 Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials
D 792 Test Methods for Density and Specific Gravity (Relative Density) and Density of Plastics by Displacement
D 883 Terminology Relating to Plastics
D 1505 Test Method for Density of Plastics by the Density-Gradient Technique
2
D1897Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials
2
D1898Practice for Sampling of Plastics 3641 Practice for Injection Molding Test Specimens of Thermoplastic Molding and
Extrusion Materials
D 3892 Practice for Packaging/Packing of Plastics
3. Terminology
3.1 Terms in this specification are in accordance with Terminology D 883.
4. Classification
4.1 This specification covers two types and eleven grades of ethyl cellulose molding and extrusion compounds as classified in
accordance with Table 1. Type I materials are general purpose and Type II are characterized by improved resistance to impact,
1
This specification is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials.
Current edition approved July 10, 2003. Published September 2003. Originally approved in 1944. Last previous edition approved in 1996 as D787–96.
This edition includes the addition of an ISO equivalency statement and a Keywords section, the elimination of superfluous references to user/seller agreements, and the
removalofspecificrequirementsrelatingtoFederal/Militaryprocurement.SomereferencestospecimenswerechangedtosamplesinkeepingwithnormalusagewithinASTM
materials standards.
Current edition approved Sept. 1, 2009. Published September 2009. Originally approved in 1944. Last previous edition approved in 2003 as D 787 – 96(2003).
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
, Vol 08.01.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 ----------------------
D787–09
TABLE 1 Detailed Requirements for Molded Test Specimens
6
NOTE 1—ft·lbf/in. 3 53.3378660
...