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This specification covers polyolefin monofilament yarn materials, and test methods for standard polyolefin monofilaments. The direct yarn number in tex or in denier, tensile properties in terms of breaking force, breaking tenacity, elongation at break and initial modulus shall be determined from a sample material. The width, thickness, gloss, hot water shrinkage, resistance to ultraviolet radiation, stability to thermal oxidation and cleanliness of the material shall also be analyzed.
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. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
Significance and Use
Acceptance Testing—The test methods in Specification D3218 for the determination of the properties of polyolefin monofilaments are considered satisfactory for acceptance testing of commercial shipments of polyolefin monofilaments, unless specified in the individual test method. These test methods are the best available and are used extensively in the trade.
If there are differences or practical significance between reported test results for two laboratories (or more) comparative test should be performed to determine if there is a statistical bias between them, using competent statistical assistance. As a minimum, test samples that are as homogeneous as possible, drawn from the material from which the disparate test results were obtained, and randomly assigned in equal numbers to each laboratory for testing. The test results from the two laboratories should be compared using a statistical test for unpaired data, at a probability level chosen prior to the testing series. If a bias is found either its cause must be found and corrected or future test results for that material must be adjusted in consideration of the known bias.
1.1 This specification covers polyolefin monofilament yarn materials, and test methods for standard polyolefin monofilaments. While designed primarily for testing standard polyolefin monofilaments, many of the procedures can be used, with little or no modification, for other polyolefin monofilaments. However, testing on non-standard polyolefin monofilaments should be conducted with caution. See 3.1 for a definition of standard polyolefin monofilament.
1.2 Only on condition that interlaboratory precision data are available for the specific procedure is any test method described, or referenced in this specification, recommended for acceptance testing of commercial shipments of polyolefin monofilaments.
1.3 The specification for polyolefin raw materials appears in Section 4.
1.4 The test methods for individual properties appear in the following sections:
|Hot Water Shrinkage||14|
|Resistance to Ultraviolet Radiation||15|
|Stability to Thermal Oxidation||16|
Note 1—In most instances, the suitability of these procedures for polymeric yarns in general, and polyolefin monofilaments in particular, is already accepted in commercial transactions (see 6.1).
1.5 The values stated in SI units are to be regarded as standard; the values in English units are provided as information only and are not exact equivalents.
1.6 The following safety hazards caveat pertains only to the test methods described in this specification: This standard may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems, 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D123 Terminology Relating to Textiles
D374 Test Methods for Thickness of Solid Electrical Insulation
D1248 Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable
D1776 Practice for Conditioning and Testing Textiles
D1907 Test Method for Linear Density of Yarn (Yarn Number) by the Skein Method
D1921 Test Methods for Particle Size (Sieve Analysis) of Plastic Materials
D2146 Specification for Propylene Plastic Molding and Extrusion Materials
D2256 Test Method for Tensile Properties of Yarns by the Single-Strand Method
D2258 Practice for Sampling Yarn for Testing
D2259 Test Method for Shrinkage of Yarns
D2565 Practice for Xenon-Arc Exposure of Plastics Intended for Outdoor Applications
D4101 Specification for Polypropylene Injection and Extrusion Materials
D4849 Terminology Related to Yarns and Fibers
E203 Test Method for Water Using Volumetric Karl Fischer Titration
G26 Practice for Operating Light-Exposure Apparatus (Xenon-Arc Type) With and Without Water for Exposure of Nonmetallic Materials (Discontinued 2001)
Other DocumentsTechnicalReport24&md A Rapid Method for the Determination of Moisture in Pigmented Polyethylene Coating Materials, Eastman Chemical Products Inc. Available from Eastman Chemical Products, Inc., Subsidiary of Eastman Kodak Co., P. O. Box 431, Kingsport, TN 37662.
ICS Number Code 59.060.20 (Man-made fibres)
UNSPSC Code 11151500(Fibers)