18 June 1981
4 April 1975
ROVING, GLASS, FIBROUS
(FOR PREPREG TAPE AND ROVING, FILAMENT
WINDING, AND PULTRUSION APPLICATIONS)
This specification is approved for use by all Departments and
Agencies of the Department of Defense.
1. SCOPE AND CLASSIFICATION
This specification covers the requirements of certain con-
continuous filament, single or multiple end, fibrous glass
rovings shall be suitable for use in prepreg tape and fil-
applications for reinforced plastic structures.
1.2 Classification. The rovings shall be of the following types, filament
sizes, classes, and yields as specified (see 6.2, 6.3, and 6.8).
Type I - ″E″ glass
G, H, J, K, L, M, N, P, S, and T filaments
Class 1 - Sizing system compatible with epoxy resin.
Class 2 - Sizing system compatible with polyester resin.
Class 3 - Sizing system compatibility as specified.
Type II - (6.8)
Type III - High tensile strength ″S″ glass.
Beneficial comments (recommendation, additions, deletions) and any pertinent
data which may be of use in improving this document should be addressed to:
Director, US Army Materials and Mechanics Research Center, ATTN: DRXMR-LS,
Watertown, MA 02172 by using the self-addressed Standardization Document
Improvement Proposal (DD Form 1426) appearing at the end of this document or