Accession Number : AD0623889

Title :   RESEARCH AND DEVELOPMENT OF HIGH TENACITY FIBERS. PART II. POLYAMIDES.

Descriptive Note : Quarterly progress rept. no. 1, 15 Jun-15 Sep 62,

Corporate Author : UNITED STATES RUBBER CO WAYNE N J RESEARCH CENTER

Personal Author(s) : Fisk,C. F. ; Pochmursky,W.

Report Date : 10 OCT 1962

Pagination or Media Count : 23

Abstract : Nylon 6 monofilaments were spun and oriented to yield a tenacity as high as 9.0 grams per denier. Single-step drawing at 350F gave as good results as were obtained by a two step process of cold-drawing followed by hotdrawing. Multifilament yarns were spun and drawn from the high molecular weight nylon 6 resin Plaskon 8205. The yarns showed considerable nonuniformity and the maximum yarn tenacity obtained was only 6.7 g/d although individual filaments had 8.2 g/d tenacity. The percent crystallinity by X-ray was found to increase after hot drawing, but the amount of crystallinity was not closely related to the tenacity obtained. The amount of polymer breakdown during spinning at 500F was found to be small and relatively unimportant. The tenacity for nylon 6 yarn was relatively unaffected by changing the testing rate at room temperature from 100% per minute to 20% per minute. An attachment has been designed and is being built which will permit spinning nylon 6 through a metering gear pump instead of spinning with extruder screw pressure along as is being done at present. (Author)

Descriptors :   (*NYLON, SPINNING(INDUSTRIAL PROCESSES)), (*SYNTHETIC FIBERS, POLYAMIDE PLASTICS), TENSILE PROPERTIES, DRAWING(FORMING), FILAMENTS, EXTRUSION, BODY ARMOR

Subject Categories : Textiles
      Plastics
      Armor

Distribution Statement : APPROVED FOR PUBLIC RELEASE