Structure Development in Melt Spinning and Cold Drawing of Poly(ethylene-co-octene) Copolymer

2006 ◽  
Vol 21 (4) ◽  
pp. 361-373 ◽  
Author(s):  
H. Shan ◽  
J. L. White
Keyword(s):  
Melt Spinning ◽  
Cold Drawing ◽  
Structure Development ◽  
Poly Ethylene

High-Speed Melt Spinning of Sheath-Core Bicomponent Polyester Fibers: High and Low Molecular Weight Poly(ethylene Terephthalate) Systems

1997 ◽  
Vol 67 (9) ◽  
pp. 684-694 ◽  
Author(s):  
J. Radhakrishnan ◽  
Takeshi Kikutani ◽  
Norimasa Okui
Keyword(s):  
Molecular Weight ◽  
High Speed ◽  
Melt Spinning ◽  
Ethylene Terephthalate ◽  
Maxwell Model ◽  
Low Molecular Weight ◽  
Structural Development ◽  
Solidification Temperature ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Sheath-core bicomponent spinning of high molecular weight poly (ethylene terephthalate) (hmpet, IV = 1.02 dl/g) and low molecular weight pet (lmpet, IV = 0.65 dl/g) is done at a take-up velocity range of 1 to 7 km/min. The structures of the individual components in the as-spun bicomponent fibers are characterized. Orientation and orientation-induced crystallization of the hmpet component are enhanced, while those of the lmpet component are suppressed in comparison to corresponding single component spinning. Numerical simulation with the Newtonian model shows that elongational stress in the hmpet component is enhanced and that of the lmpet decreases during high-speed bicomponent spinning. The difference in elongational viscosity is the main factor influencing the mutual interaction between hmpet and lmpet, which in turn affect spinline dynamics, solidification temperature, and structural development in high-speed bicomponent spinning. Simulation with an upper-convected Maxwell model shows that considerable stress relaxation can occur in the lmpet component if the hmpet component solidifies before lmpet. A mechanism for structural development is also proposed, based on the simulation results and structural characterization data.

scholarly journals HIGH SPEED MELT SPINNING OF POLYESTER/ETHER POLY(ETHYLENE-1, 2-DIPHENOXYETHANE-p, p′-DICARBOXYLATE)

1986 ◽  
Vol 42 (7) ◽  
pp. T379-T388 ◽  
Author(s):  
Jiro Shimizu ◽  
Norimasa Okui ◽  
Yoshitaka Imai ◽  
Akira Takaku
Keyword(s):  
High Speed ◽  
Melt Spinning ◽  
Poly Ethylene

scholarly journals ORIENTATION BEHAVIOR OF BRANCHED POLY (ETHYLENE TEREPHTHALATE) IN MELT SPINNING PROCESS

1980 ◽  
Vol 36 (8) ◽  
pp. T319-T323
Author(s):  
Takeshi Akahane ◽  
Takani Mochizuki ◽  
Haruo Nakayasu ◽  
Shuji Kawai
Keyword(s):  
Melt Spinning ◽  
Ethylene Terephthalate ◽  
Orientation Behavior ◽  
Poly Ethylene Terephthalate ◽  
Spinning Process ◽  
Poly Ethylene
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