SAE AMS 3787A:2001 pdf download Thread, Para-Aramid Intermediate Modulus
1 . SCOPE:
1 .1 Form: This specification and its supplementary detail specifications cover para-aramid materials in the form of thread.
1 .2 Application: Primarily for use in sewing clothing, equipage, and air delivery and safety equipment.
1 .3 Classification: The requirements specified herein and in the applicable detail specifications define each type of thread by length per unit weight and breaking strength as shown in the detail specification titles.
1 .4 Safety – Hazardous Materials: While the materials, methods, applications, and processes described or referenced in this specification may involve the use of hazardous materials, this specification does not address the hazards which may be involved in such use. It is the sole responsibility of the user to ensure familiarity with the safe and proper use of any hazardous materials and to take necessary precautionary measures to ensure the health and safety of all personnel involved.
2. APPLICABLE DOCUMENTS: The following publications form a part of this specification to the extent specified herein. The applicable issue of referenced publications shall be the issue in effect on the date of the purchase order.
2.1 ASTM Publications:
Available from ASTM, 1 91 6 Race Street, Philadelphia, PA 1 91 03-1 1 87.
ASTM D 1 23 Terminology Relating to Textiles
ASTM D 1 788 Rigid Acrylonitrile-Butadiene-Styrene (ABS) Plastics
ASTM D 41 01 Propylene Plastic Injection and Extrusion Materials
2.2 U.S. Government Publications:
Available from Standardization Documents Order Desk, Building 4D, 700 Robbins Avenue,
Philadelphia, PA 1 91 1 1 -5094.
2.2.1 Federal Specifications:
PPP-P-50 Packaging and Packing of Thread for Domestic and Overseas Shipment
2.2.2 Federal Standards:
FED-STD-1 91 Textile Test Methods
2.2.3 Military Standards:
MIL-STD-1 05 Sampling Procedures and Tables for Inspection by Attributes
3. TECHNICAL REQUIREMENTS:
3.1 Detail Specification:
The requirements for a specific thread shall consist of all requirements specified herein in addition to requirements specified in the applicable detail specification. In case of conflict between requirements of this specification and requirements of the applicable detail specification, requirements of the detail specification shall govern.
3.2 Material:
3.2.1 The yarn used in the thread shall be a para-aramid, intermediate modulus type.
3.2.2 Thread Finish: Thread shall be waxed or finished so that it will have a smooth, dressed surface suitable for high-speed machine sewing. For additional structural integrity, 0.5 to 1 .0% by weight of a resinous finish, such as polyvinyl butyral, may be applied.
3.3 Properties: Thread shall conform to the requirements specified in the applicable detail specification, determined on the thread supplied and in accordance with the following test methods:
3.3.1 Weight: FED-STD-1 91 , Method 401 0.
3.3.2 Breaking Strength: FED-STD-1 91 , Method 41 00. One determination per sample unit; report result as “pass” or “fail”.
3.3.3 Direction of Twist; Initial and Final: FED-STD-1 91 , Method 4050.
SAE AMS 3787A:2001 pdf download
