ASTM D3770-91

Specification for Flexible Cellular Materials-High-Resilience Polyurethane Foam (HR) and Combustion Modified High Resilience (CMHR) Polyurethane Foam (Withdrawn 1998)

SCOPE
1.1 This specification covers the minimum physical properties and other requirements for high-resilience polyurethane foam (HR) and combustion modified high resilience polyurethane foams (CMHR).  
1.2 Combustion modified high resilience polyurethane foams are high resilience foams that have been modified to meet specific flammability requirements.  
1.3 This specification includes references to government regulations for burning characteristics of flexible cellular materials used in specific applications (see Table 1).

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1990
• Withdrawal Date: 09-Mar-1998
• ICS: 83.100 - Cellular materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.22 - Cellular Materials - Plastics and Elastomers

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 3770 – 91
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Flexible Cellular Materials—High-Resilience Polyurethane
Foam (HR) and Combustion Modified High Resilience
(CMHR) Polyurethane Foam
This standard is issued under the fixed designation D 3770; 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.
TABLE 1 Applicable Government Regulations for Specified
1. Scope
Applications
1.1 This specification covers the minimum physical proper-
Types Application Regulation
ties and other requirements for high-resilience polyurethane
1 Automotive DOT MVSS 302
foam (HR) and combustion modified high resilience polyure-
2 Mattress and Cushion DOC FF 4–72
thane foams (CMHR).
3 Mattress and Cushion CAL. TB 117
4 Mattress and Cushion CAL. TB 133
1.2 Combustion modified high resilience polyurethane
5 Mattress and Cushion NFPA 260
foams are high resilience foams that have been modified to
6 Mattress and Cushion NFPA 260
meet specific flammability requirements.
7 Mattress and Cushion BSI 5852
8 Aviation FAA Part 25.853 paragraph 6 Append. F
1.3 This specification includes references to government
9 Aviation FAA Oil Burner test
regulations for burning characteristics of flexible cellular
10 Miscellaneous ASTM D3675
materials used in specific applications (see Table 1).
2. Referenced Documents
3. Classification
2.1 ASTM Standards:
3.1 This specification covers two grades of flexible high-
D 3453 Specification for Flexible Cellular Materials—
resilience polyurethane foam material that may be selected for
Urethane for Furniture and Automotive Cushioning, Bed-
use according to load-bearing and other minimum physical
ding, and Similar Applications
properties (see Table 2). Generally, Grade HR-I is used for
D 3574 Test Methods for Flexible Cellular Materials—Slab,
furniture applications and Grade HR-II is used for furniture
Bonded, and Molded Urethane Foams
applications and mattresses.
D 3675 Test Method for Surface Flammability of Flexible
4. Ordering Information
Cellular Materials Using a Radiant Heat Energy Source
2.2 Other Documents:
4.1 Any product represented as complying with this speci-
DOT MVSS 302
fication shall meet all the requirements listed herein for its
DOC FF 4–72
particular classification.
CAL. TB 117
4.2 Orders for material under this specification shall include
CAL. TB 133
the following information:
NFPA 260
4.2.1 Type I or II of HR required as listed in this specifica-
BSI 5852
tion,
FAA Part 25.853, Paragraph 6, Appendix F
4.2.2 Grade number and quality as listed in Table 1 of
FAA Oil Burner Test
Specification D 3453,
4.2.3 Dynamic fatigue performance, if required, as listed in
Table 2 of Specification D 3453,
This specification is under the jurisdiction of ASTM Committee D-20 on
4.2.4 Dimension of foam, and
Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular
4.2.5 Combustibility requirements, if any, as listed in Table
Plastics.
Current edition approved Oct. 15, 1991. Published April 1992. Originally 1.
published as D 3770 – 79. Last previous edition D 3770 – 79 (1985).
Annual Book of ASTM Standards, Vol 09.02.
5. Physical Requirements
Available from Superintendent of Documents, U.S. Government Printing
5.1 The material shall conform to the requirements for
Office, Washington, DC 20402.
Available from California Bureau of Home Furnishings, 3485 Orange Grove physical properties prescribed in Table 2.
Ave., North Highlands, CA 95660.
Available from National Fire Protection Association, 1 Batterymarch Park, P.O.
6. Test Methods
Box 9101, Quincy, MA 02269.
6.1 The physical tests shall be in accordance with Methods
Available from British Standards Institute, 2 Park Street, London, England
W1A 2B5. D 3574.
D 3770
TABLE 2 Physica
...