ASTM F3340 - 18

    Standard Test Method for Thermal Resistance of Camping Mattresses Using a Guarded Hot Plate Apparatus

    Active Standard ASTM F3340 | Developed by Subcommittee: F08.22

    Book of Standards Volume: 15.07


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    Significance and Use

    5.1 The thermal resistance of camping mattresses is an important indicator of insulation performance. This test method establishes criteria to measure this property consistently and in conditions relevant to the application. The measured value can be used for evaluating the thermal insulation performance of the camping mattresses, thus assisting with the product construction and design and providing guidance for consumers in comparing and selecting a mattress.

    1. Scope

    1.1 This test method covers the measurement of the thermal resistance of camping mattresses in conditions of steady-state heat transfer, using a two-plate apparatus. The camping mattress is held under constant compressive force between a guarded hot plate and a cold plate. The primary heat transfer for this method is one dimensional, vertically through the camping mattress thickness. As such this measured thermal insulation value is a repeatable comparative measurement. However, it should be noted that this value may not always correlate to actual insulation performance as real-world heat transfer may differ slightly because of additional heat losses possibly involved (for example, edge heat loss, uncovered surface heat loss, compression rate changes or posture changes during sleep).

    1.2 This test method is applicable to all types of camping mattresses (for example, inflating air mattress with or without insulation, inflating air mattress with reflective materials, self-inflating open cell foam mattress with or without coring, closed cell non-inflatable foam mats). Auxiliary insulation of any type shall be excluded in the measurement. Auxiliary insulations are any type of material removable from the mattress (for example, sleeping bags, mattress covers).

    1.3 The sample thickness shall not exceed the limit determined by the hot plate dimensions stated in 7.1.2.

    1.4 Units—The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.

    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.

    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.


    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C168 Terminology Relating to Thermal Insulation

    C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus

    D1518 Test Method for Thermal Resistance of Batting Systems Using a Hot Plate

    E177 Practice for Use of the Terms Precision and Bias in ASTM Test Methods

    E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method

    ISO Standard

    ISO 8302


    ICS Code

    ICS Number Code 17.200.10 (Heat. Calorimetry); 97.200.30 (Camping equipment and camp-sites)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/F3340-18

    Citation Format

    ASTM F3340-18, Standard Test Method for Thermal Resistance of Camping Mattresses Using a Guarded Hot Plate Apparatus, ASTM International, West Conshohocken, PA, 2018, www.astm.org

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