Full Description 1. Polymers consist of homopolymer, copolymers, and elastomer compounded with or without the addition of impact modifiers, for example, ethylene-propylene rubber, polyisobutylene rubber, and butyl rubber, colorants, stabilizers, lubricants, or reinforcements. The proportions of recycled, reconstituted, and reground material used, as well as the nature and the amount of any contaminant, cannot be practically covered in this classification system. It is the responsibility of the supplier and the buyer of recycled, reconstituted, and reground materials to ensure compliance. See Guide D
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You are on page 1of 16 Search inside document Standard Specification for Polypropylene Injection and Extrusion Materials1 This standard is issued under the fixed designation D ; 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.
This standard has been approved for use by agencies of the Department of Defense. The selection of these materials is to be made by personnel with expertise in the plastics field where the environment, inherent properties of the materials, performance of the part, part design, manufacturing process, and economics are considered.
Polymers consist of tions prior to use. Referenced Documents stabilizers, lubricants, or reinforcements. The proportions of re- Commercial Power Frequencies cycled, reconstituted, and reground material used, as well as D Test Methods for A-C Loss Characteristics and the nature and the amount of any contaminant, cannot be Permittivity Dielectric Constant of Solid Electrical Insu- practically covered in this specification.
It is the responsibility lation of the supplier and the buyer of recycled, reconstituted, and D Test Methods for Determining the Izod Pendulum reground materials to ensure compliance. See Guide D Impact Resistance of Plastics 1. There may be other require- Resistance of Solid Electrical Insulation ments necessary to identify particular characteristics important to specific D Test Method for Specular Gloss applications.
These will be designated by using the suffixes given in D Practices for Evaluating the Resistance of Plastics to Section 1. Chemical Reagents 1. Published May Last previous edition approved in as D — 03b. Terminology 4. C, Table G, and Table T. Table PP and Table B specify the 3.
T specify the properties after the addition of reinforcements, 3. The injection pressure along with the injection percentage of addition by mass, with the tolerances as tabu- speed determines the volumetric fill rate of the mold. G Glass reinforced— 3.
M Mineral-reinforced— 3. To facilitate 3. If necessary, additional requirements shall be indicated by the use of the both platens. See Note 5. Polypropylene random copoly- polypropylene material is as follows. These are electrical limits facilitate the classification of special materials where Table PP usually applied to unreinforced polypropylene when control of does not reflect the required properties of that unreinforced their electrical properties is required.
Dielectric constant, Test Methods D or 2. Suffixes ated test apparatus that conforms to Practice D using Test Cycle A for exterior applications. Section 7, of Classification D The this irradiance level. Conformance or nonconformance with the specification is based on this comparison. Sampling dulling and chalking or deep-seated changes such as checking, 9.
A batch or lot of resin the original. These will be spelled out in detail and identified Test Method D mold, with a thickness of 3. Basic Requirements General Requirements The color and Melt 7.
The needle should be prevents the product from meeting the performance criteria for moved around in the plastic mass, and a sufficient number of which it was manufactured. To minimize heat loss from the plastic during measurement, the 8. Detail Requirements mass should be collected in a heated container, or in one made 8. The quantity of to the requirements prescribed in Table PP, Table A, Table B, plastic in the free shot should be controlled to be equivalent to Table C, Table G, Table T, and to the suffix requirements as the weight of a complete injection-molded shot.
To avoid they apply. In those cases, the storage medium can be the same as for unfilled materials. Since the needle-type pyrometer technique is somewhat Materials whose properties are affected by humidity, must be tedious, a second technique using an infrared pyrometer may stored in accordance with Practice D , Procedure A.
For all be used. It is methods for electrical testing. In all cases the laboratory shall recommended that the infrared pyrometer have a laser beam to report both the temperature and humidity conditions during the establish the position being measured on the molten mass of conditioning period. The correlation shall be laboratory atmosphere. For a given machine and a given mold, the callout, data for publication, or for cases of dispute over testing injection pressure and the injection speed controls shall be set values.
The injection speed impact shall be notched within 1 to 16 h after molding. Once and injection pressure shall be set to minimize sink and flash. Once the injection NOTE 14—Polypropylene properties change with time as a result of NOTE 12—A single stage pressure can be obtained in two different amorphous densification and, in some cases, due to a small degree of ways: 1 Injection pressure may be set to reach a specified pressure then secondary crystallization in the rubbery phase.
For all materials to be tested for electrical properties, the in accordance with Practice D In all cases the laboratory accordance with Test Method D Conditioning Test Methods For natural unfilled polypropylene the controlled unless otherwise stated herein. Specimens may be Make two determinations on the material in the form envelopes, plastic bags, or racks, whichever is most practical that it is to be molded such as powder, pellets, or granules. It is recommended NOTE 15—This test method serves to indicate the degree of uniformity that specimens be allowed to cool for about 30 min on a bench of the flow rate of the polymer of a single manufacturer as made by an or in a rack before they are placed in any container where the individual process and, in this case, may be indicative of the degree of specimens may come in contact with each other.
For filled and uniformity of molded specimens, and therefore other properties. However, reinforced polypropylene or polypropylene blends, which con- uniformity of flow rate among various polymers of various manufacturers 6 D — 04 as made by various processes does not, in the absence of other tests, Specimens Before cutting the test specimen an incremental discrimination of at least 0.
Measure- from the tensile bar, draw a symbol of any design in the straight ments shall be made with a micrometer, preferably with center section of the bar to indicate which is the gate end of the ratchet, having a movable circular contact foot and a lower specimen.
Cut out the Specimens shall bar. The specimens shall be notched in accordance with Test be measured in accordance with Test Methods D Specimens shall be notched When notched, the apex of the notch shall be The more critical dimension is the Notched specimens The specimen shall be inserted in the clamp with 0. When testing, the specimen shall be clamped D Type I specimen. It is mandatory that the toe correction in the grips with the minimum pressure necessary to prevent be made to correct for the slack in the test fixture and load cell.
Should this pressure deform the specimen, then the crosshead speed of 1. Calculate the average value of clamp pressure may be reduced. What is critical is that the length of material above is placed away from the loading nose. Failure to maintain the The test span shall be known to an accuracy of 0. The loading nose shall be precisely centered between the supports. The test with a load applied at the center to give maximum fiber stresses specimen shall be aligned perpendicular to the supports to an accuracy of of kPa.
More D Polymers consist of homopolymer, copolymers, and elastomer compounded with or without the addition of impact modifiers ethylene-propylene rubber, polyisobutylene rubber, and butyl rubber , colorants, stabilizers, lubricants, or reinforcements. Tests shall be conducted on each of the specimens to determine the required physical and mechanical properties of the materials. The specimens for the various materials shall conform to the following requirements: nominal flow rate; test specimen dimensions; tensile stress at yield; flexural modulus; Izod impact resistance; deflection temperature; and multiaxial impact ductile-brittle transition temperature. This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application.
More D Scope 1. Polymers consist of homopolymer, copolymers, and elastomer compounded with or without the addition of impact modifiers ethylene-propylene rubber, polyisobutylene rubber, and butyl rubber , colorants, stabilizers, lubricants, or reinforcements. The proportions of recycled, reconstituted, and reground material used, as well as the nature and the amount of any contaminant, cannot be practically covered in this specification.