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ASTM D787-12

(Specification)

Standard Specification for Ethyl Cellulose Molding and Extrusion Compounds

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-Jul-2012
ICS
83.140.99 - Other rubber and plastics products
Technical Committee
D20 - Plastics
Drafting Committee
D20.15 - Thermoplastic Materials
Current Stage
Ref Project

Relations

Replaces
ASTM D787-09 - Standard Specification for Ethyl Cellulose Molding and Extrusion Compounds
Effective Date
01-Aug-2012
Replaced By
ASTM D787-18 - Standard Specification for Ethyl Cellulose Molding and Extrusion Compounds
Effective Date
01-Apr-2018
Referred By
ASTM D4000-23 - Standard Classification System for Specifying Plastic Materials
Effective Date
01-Aug-2012

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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 −12
Standard Specification 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 Aug. 1, 2012. Published August 2012. Originally
6.3 These materials may contain colorants in the nominal
approved in 1944. Last previous edition approved in 2009 as D787– 09. DOI:
amountsordinarilyemployed,butsuchadditivesshallnotalter
10.1520/D0787-12.
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 service@astm.org. 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

---------------------- Page: 1 ----------------------
D787−12
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 Grade G
...

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 − 09 D787 − 12
Standard Specification 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. 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 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.
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
D618 Practice for Conditioning Plastics for Testing
D638 Test Method for Tensile Properties of Plastics
D648 Test Method for Deflection Temperature of Plastics Under Flexural Load in the Edgewise Position
D785 Test Method for Rockwell Hardness of Plastics and Electrical Insulating Materials
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
D883 Terminology Relating to Plastics
D1505 Test Method for Density of Plastics by the Density-Gradient Technique
D3641 Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials
D3892 Practice for Packaging/Packing of Plastics
3. Terminology
3.1 Terms in this specification are in accordance with Terminology D883.
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,
especially at low temperatures. The grades are classified in accordance with their physical properties as specified in Table 1.
5. Ordering Information
5.1 Purchase orders for, or inquiries about, the materials described in this specification shall identify the following:
5.1.1 The number of this specification and the required type and grade chosen from Table 1, for example, D787 Type 1, Grade
1.
5.1.2 Supplementary requirements in accordance with this specification if necessary.
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 Sept. 1, 2009Aug. 1, 2012. Published September 2009August 2012. Originally approved in 1944. Last previous edition approved in 20032009
as D787 – 96D787(2003). – 09. DOI: 10.1520/D0787-09. 10.1520/D0787-12.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 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.
*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 − 12
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 Grade Grade Grade Grade Grade
Methods
1 2 3 4 5 6 7 8 9 10 11
Specific gravity, unpigmented, max at 23/ 1.13 1.13 1.12 1.12 1.11 1.10 1.12 1.12 1.11 1.11 1.10 D792
23°C (73.4/73.4°F)
Hardness (Rockwell) R scale, min 110 110 105 105 100 95 105 80 75 75 50 D785
Tensile strength at 23°C, min:
MPa 44.8 41.4 38.1 33.0 31.0 24.2 27.6 24.1 20.7 20.0 15.9 D638
psi 6500 6000 5400 4800 4500 3800 4000 3500 3000 3300 2900
Im
...

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SCOPE
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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.  
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ASTM
ASTM D1562-22(Specification)
Standard Classification System and Basis for Specification for Cellulose Acetate Propionate Molding and Extrusion Compounds (CAP)

SCOPE
1.1 This classification system covers requirements for plasticized cellulose acetate propionate thermoplastic compounds suitable for injection molding and extrusion. These compounds have a propionyl content less than 48 % and an acetyl content less than 3 % and can contain dyes and pigments. Cellulosic plastic materials, being thermoplastic, are reprocessable and recyclable. This classification system allows for the use of those cellulosic materials, provided that all specific requirements of this classification system are met.  
1.2 The properties included in this classification system are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are specified by using the suffixes as given in Section 5.  
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 11, 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 D5336-22(Specification)
Standard Classification System and Basis for Specification for Polyphthalamide (PPA) Injection Molding Materials

ABSTRACT
This specification covers the classification, testing, and requirements of polyphthalamide (PPA) materials, both virgin and recycled, suitable for injection molding. This specification is intended to be a means of calling out plastics materials used in the fabrication of end items or parts, and not for the selection of materials. The materials are classified into groups according to crystallinity, and are further subdivided into classes and grades as specified. Materials shall be sampled, prepared, and conditioned appropriately for testing, for which specimens shall conform to specified values of the following requirements: inherent viscosity; melting temperature; glass transition; tensile strength; flexural strength and modulus; Izod impact strength; deflection temperature; and moisture.
SCOPE
1.1 This classification system covers polyphthalamide (PPA) materials suitable for injection molding.  
1.2 The properties included in this classification system are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specialized applications are to be specified by using suffixes as given in Section 5.  
1.3 This classification system allows for the use of recycled materials provided that all specification requirements are met.  
1.4 This classification system is intended to be a means of calling out plastics 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 plastics field only after careful consideration of the design and the performance required of the part, the environment to which it will be exposed, the fabrication process to be employed, the costs involved, and the inherent properties of the material other than those covered by this classification system.  
1.5 The values stated in SI units are to be regarded as the standard (see IEEE/ASTM SI-10). The values given in parentheses are for information only.  
1.6 The following precautionary caveat pertains only to the test methods portion, Section 11, 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. Specific precautionary statements are given in 11.7.1.
Note 1: There is no known ISO equivalent to this standard. ISO 16396-1/-2 for polyamides may also be used to describe and classify these PPA materials, but the technical content is significantly different.
Note 2: ASTM Standard D6779 on polyamide materials also includes PPA materials in its coverage of various polyamide chemistries. This standard gives additional information for classification and specification for PPA compositions classified as Group 10 (PA6T/66), Group 12 (PA6T/6I/66) and Group 13 (PA6T/6I) in ASTM Standard D6779 and includes provisions for other PPA compositions to utilize the classification presented.  
1.7 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 D3294-22(Specification)
Standard Specification for Polytetrafluoroethylene (PTFE) Resin Molded Sheet and Molded Basic Shapes

ABSTRACT
This specification establishes the requirements and test methods for the material, dimensions, and workmanship, and the physical and electrical properties of molded sheet manufactured from polytetrafluoroethylene (PTFE) resin molding materials and molded basic shapes made from resin molding and extrusion materials. The sheet or molded basic shape shall be made from unpigmented PTFE and shall be free from foreign matters. Each of the samples shall undergo visual and dimensional inspection to verify their compliance with the standard requirements. The specimens shall conform to the following physical and electrical property requirements: tensile strength; elongation; dielectric strength; specific gravity; porosity; and melting point. Examination for internal defects shall also be conducted to ensure that the specimens are free from microscopic cracks, voids, inclusions, and other surface defects that might affect the serviceability of the materials.
SCOPE
1.1 This specification establishes requirements and methods of test for the material, dimensions, and workmanship, and the physical and electrical properties of molded sheet in minimum thicknesses of 0.794 mm (1/32 in.) manufactured from PTFE resin molding materials defined in Specification D4894.  
1.2 This specification also establishes requirements for molded basic shapes made from molding materials. This specification is for products 300 mm (12 in.) or less in a dimension parallel to and 12.7 mm (0.5 in.) or greater in the dimension perpendicular to the direction of the applied molding pressure.  
1.3 The values stated in SI units are to be regarded as the standard.  
1.4 The following precautionary caveat pertains only to the test method portion, Section 7, 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Special attention is called to 13.2, 13.3, 13.6, 13.8, and A1.  
Note 1: There is no known ISO equivalent to this standard.  
1.5 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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