NEWS - Page 14 of 77

20 Nov

ASTM D4637-2021 Standard Specification for EPDM Rubber Sheeting for Single Layer Roofing

Radius 1.1 This specification covers flexible panels made of ethylene-propylene diene rubber (EPDM) for single-layer roof membranes exposed to weather. The test and performance limits used to characterize the sheet are values that ensure the lowest quality for the intended use. The sheet may be unreinforced, fabric or thin pine reinforced, or a vulcanized rubber sheet backed by fabric. 1.2 Design criteria for on-site roof systems, such as fire resistance, site joint strength, material compatibility and heave resistance, are factors that [...]

20 Nov

ASTM D4674-2019 Standard Practice for Accelerated Testing of Color Stability of Plastics Exposed to Indoor Office Environments

Meaning and use 5.1 Tests conducted in accordance with this practice are designed to cause changes in properties associated with exposure to light and heat used in typical office environments. These exposures are not intended to simulate deterioration caused by local phenomena such as handling, fouling, etc. Note 5: Please refer to Practice G151 for the complete warning guidelines applicable to all laboratory aging equipment. For additional information on sources of variability and strategies to address variability through the design and [...]

18 Nov

ASTM D5215-2021 “Instrumental Evaluation of Coloration of Adhesives for Substrate”

Meaning and use 5.1 Certain substances in adhesives may cause discoloration of vinyl flooring. This test method provides a way to measure discoloration in vinyl that may occur as a result of contact with these adhesives. Vinyl substrate samples, whether in contact with or without the adhesive, are exposed to heat and UVA light to accelerate discoloration. With a colorimeter or spectrophotometer, the color difference between exposed specimens can be accurately measured. Therefore, an instrumental assessment rather than an individual [...]

18 Nov

ASTM D573-2019 “Rubber Hot Air Aging Test Method Standard”

Meaning and use 4.1 Rubber and rubber products need to resist the deterioration of physical properties over time caused by oxidation and thermal aging. The test method provides a way to evaluate these performance characteristics of rubber under certain acceleration conditions specified. 4.2 For important information on standard compounds used for precision testing to accelerate test aging assessment, see Annex A1. ASTM D573-2019 “Rubber Hot Air Aging Test Method Standard” Radius 1.1 This test method covers procedures for determining the effect of high temperature [...]

18 Nov

ASTM D6577-2019 Standard Guide for Testing Industrial Protective Coatings

Meaning and use 4.1 This guide is intended to assist in the selection of appropriate tests to assess the expected general performance level of a coating or coating system on a given substrate exposed to a given type of environment. Table 1 lists all the tests. 4.2 The importance of surface treatment or cleanliness prior to coating to the normal performance of the coating is needless to say. 4.3 The results obtained in the tests referenced in this Guide may not be [...]

18 Nov

ASTM D6662-2022 Standard Specification for Polyolefin Based Wood-Plastic Decorative Panels

concept This code covers polyolefin-based plastic wood products used as exterior residential decks. Plastic wood products are currently made mainly from recycled polyolefin plastics (especially high-density polyethylene), where the cross section of the product is more or less uneven. However, the specification may also apply to similar plastic products made from other plastics and plastic composites with non-uniform cross sections. The performance requirements that the product should comply with include bending properties (allowing bending stress, effective elastic modulus and creep [...]

17 Nov

ASTM D6904-2022 “Test Method for Weather Resistance of Exterior Coatings on Masonry Structures”

Meaning and use 4.1 This practice is intended to simulate the ability of a coating system applied to masonry blocks to withstand a continuous spray of water (rain) and a dynamic pressure equivalent to a wind speed of 98 mph, without exhibiting leakage or weight gain, or both. ASTM D6904-2022 “Test Method for Weather Resistance of Exterior Coatings on Masonry Structures” Radius 1.1 This practice is used to assess the ability of paint to resist water passing through masonry blocks when exposed to [...]

17 Nov

ASTM D904-2021 Fluorescent Ultraviolet (see Method A) or xenon Arc Sources (see Method B)

Meaning and use 4.1 This practice is used to determine the effects of ultraviolet light or ultraviolet light and water on adhesive bonded joints under controlled but artificial conditions. The results of this practice can be used to compare the relative durability of several adhesives under specific laboratory UV exposure. 4.2 This practice is not intended to determine the lifetime prediction of the adhesive in use. It is only used to determine the relative durability between different adhesives. 4.3 Due to the [...]

17 Nov

ASTM F1945-2011 Determination of Light Stability of ink-jet Prints Exposed to Indoor Fluorescent Lamps

Meaning and use 5.1 The light resistance of printing inkjet media over a specified period of time is related to the end use of these materials. Since the ability of inkjet prints to withstand color changes is a function of the spectral power distribution of the light source to which they are exposed, it is important to evaluate light resistance under conditions suitable for the end use. While inkjet printing can be processed and displayed under a variety of conditions, [...]

16 Nov

ASTM C1184-2018 Standard Specifcation for Structural Silicone Sealants

concept This specification describes the properties of elastostructural silicone sealants with cold liquid, one – or multi-component, chemically cured, referred to herein as sealants. These sealants are designed to structurally bond the components of a structural sealant glass system. Sealant should be classified according to type and use: S type; Type M; Use G; And use O. The physical, mechanical and performance characteristics of the sealant should meet the requirements described. The following test methods should be performed: rheological properties; [...]