東華大學圖書館 |

Language: English

Help

回圖書館首頁

手機版館藏查詢

Back

Switch To: Labeled | MARC Mode | ISBD

Processing mechanics of alternate tw...

Elkhamy, Donia Said.

Linked to FindBook

Google Book

Amazon

博客來

Processing mechanics of alternate twist ply (ATP) yarn technology.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Processing mechanics of alternate twist ply (ATP) yarn technology./
Author:	Elkhamy, Donia Said.
Description:	244 p.
Notes:	Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5498.
Contained By:	Dissertation Abstracts International68-08B.
Subject:	Engineering, Materials Science. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3275171
ISBN:	9780549155379

Processing mechanics of alternate twist ply (ATP) yarn technology.
Elkhamy, Donia Said.

Processing mechanics of alternate twist ply (ATP) yarn technology. - 244 p.

Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5498.

Thesis (Ph.D.)--Drexel University, 2007.

Ply yarns are important in many textile manufacturing processes and various applications. The primary process used for producing ply yarns is cabling. The speed of cabling is limited to about 35m/min. With the world's increasing demands of ply yarn supply, cabling is incompatible with today's demand activated manufacturing strategies.

ISBN: 9780549155379Subjects--Topical Terms:

1017759
Engineering, Materials Science.

Processing mechanics of alternate twist ply (ATP) yarn technology.
LDR:03053nam 2200289 a 45 001 951810
005 20110617
008 110617s2007 ||||||||||||||||| ||eng d
020 $a 9780549155379
035 $a (UMI)AAI3275171
035 $a AAI3275171
040 $a UMI $c UMI
100 1 $a Elkhamy, Donia Said. $3 1275817
245 1 0 $a Processing mechanics of alternate twist ply (ATP) yarn technology.
300 $a 244 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-08, Section: B, page: 5498.
502 $a Thesis (Ph.D.)--Drexel University, 2007.
520 $a Ply yarns are important in many textile manufacturing processes and various applications. The primary process used for producing ply yarns is cabling. The speed of cabling is limited to about 35m/min. With the world's increasing demands of ply yarn supply, cabling is incompatible with today's demand activated manufacturing strategies.
520 $a The Alternate Twist Ply (ATP) yarn technology is a relatively new process for producing ply yarns with improved productivity and flexibility. This technology involves self plying of twisted singles yarn to produce ply yarn. The ATP process can run more than ten times faster than cabling. To implement the ATP process to produce ply yarns there are major quality issues; uniform Twist Profile and yarn Twist Efficiency. The goal of this thesis is to improve these issues through process modeling based on understanding the physics and processing mechanics of the ATP yarn system.
520 $a In our study we determine the main parameters that control the yarn twist profile. Process modeling of the yarn twist across different process zones was done. A computational model was designed to predict the process parameters required to achieve a square wave twist profile.
520 $a Twist efficiency, a measure of yarn torsional stability and bulk, is determined by the ratio of ply yarn twist to singles yarn twist. Response Surface Methodology was used to develop the processing window that can reproduce ATP yarns with high twist efficiency. Equilibrium conditions of tensions and torques acting on the yarns at the self ply point were analyzed and determined the pathway for achieving higher twist efficiency. Mechanistic modeling relating equilibrium conditions to the twist efficiency was developed. A static tester was designed to zoom into the self ply zone of the ATP yarn. A computer controlled, prototypic ATP machine was constructed and confirmed the mechanistic model results. Optimum parameters achieving maximum twist efficiency were determined in this study. The successful results of this work have led to the filing of a US patent disclosing the method for producing ATP yarns with high yarn twist efficiency using a high convergence angle at the self ply point together with applying ply torque.
590 $a School code: 0065.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Textile Technology. $3 1020710
690 $a 0794
690 $a 0994
710 2 $a Drexel University. $3 1018434
773 0 $t Dissertation Abstracts International $g 68-08B.
790 $a 0065
791 $a Ph.D.
792 $a 2007
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3275171