The Effect of Pre-Entangling Device on Polyester Industrial Yarn Production

2021 ◽  
Vol 11 (02) ◽  
pp. 95-100
Author(s):  
少锐 赵
Keyword(s):  
2016 ◽  
Vol 12 (02) ◽  
pp. 5
Author(s):  
Fenhua Sheng ◽  
Zujue Chen

The paper mainly aimed at solving the problem of yarn color fault detection. Yarn with different color is hard to detect in yarn production, a special photoelectric sensor is designed in this paper. First, this paper analyzed the requirement of light source and photoelectric receiver in the photoelectric sensor, and designs the light path and driver circuit. Then this paper analyzed the amplifier circuit and noise in the photoelectric sensor, with an amplifier circuit of minimal noise proposed at last. Finally, this paper tested the yarn color fault detection system with virtual instrument, and the test results showed a great application prospect of the photoelectric sensor. Photoelectric yarn clearer was the first type of electronic yarn clearer, but due to the under development of the optical technology and measurement technology, the photoelectric yarn cleaner can't meet the requirements of textile production, gradually replaced by capacitive yarn cleaner. Though photoelectric yarn cleaner had a good visual conformity degree, it’s still a unreplaceable method in colored yarn faults


2003 ◽  
pp. 40-60 ◽  
Author(s):  
Keith Slater
Keyword(s):  

2021 ◽  
pp. 71-100
Author(s):  
Jim Powell

This chapter investigates Britain’s cotton supply and usage during the war. It examines all the issues that have been misinterpreted or ignored: cotton imports, bale weights, cotton re-exports, wastage in spinning, raw cotton stocks, stocks of cotton goods, exports of cotton goods and investment in new mills. There was nothing abnormal about the cotton market in 1859–61. Without the war, there would have been no allegation of pre-war over-production, no assertion of the glutting of overseas markets. The chapter offers an alternative explanation of why short-term working, which led to the Lancashire cotton famine, began in October 1862 when there was not yet a scarcity of cotton. The international cotton trade needed a large pipeline of stock. The outbreak of war, followed by the Confederate embargo and the Union blockade, paralysed the world market and caused an abrupt fall in demand. The conclusion is that, for the three main years of the war, British yarn production was at 36 per cent of the market requirement, and that about 4.5 billion lb of raw cotton was denied to Britain in the seven years to the end of 1867.


Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2559
Author(s):  
Wenqian Zhai ◽  
Peng Wang ◽  
Xavier Legrand ◽  
Damien Soulat ◽  
Manuela Ferreira

Micro-braiding and co-wrapping techniques have been developed over a few decades and have made important contributions to biocomposites development. In this present study, a set of flax/polypropylene (PP) micro-braided and co-wrapped yarns was developed by varying different PP parameters (PP braiding angles and PP wrapping turns, respectively) to get different flax/PP mass ratios. The effects on textile and mechanical characteristics were studied thoroughly at the yarn scale, both dry- and thermo-state tensile tests were carried out, and tensile properties were compared before and after the braiding process to study the braidabilities. It was observed that PP braiding angles of micro-braided yarn influenced the frictional damage on surface treatment agent of flax roving, the cohesive effect between PP filaments/flax roving, and the PP cover factor; PP wrapping turns of co-wrapped yarn had a strong impact on the flax roving damage and the PP coverage, which further influenced the characteristics. Micro-braided yarn and co-wrapped yarn with the same flax/PP mass ratio were compared to evaluate the two different hybrid yarn production techniques; it was proven that micro-braided yarn presented better performance.


1947 ◽  
Vol 38 (10) ◽  
pp. P461-P468
Author(s):  
S. A. G. Caldwell
Keyword(s):  

2018 ◽  
Vol 57 (4) ◽  
pp. 2975-2989
Author(s):  
Hassan A.H. Ahmed ◽  
Rola S. Afify ◽  
Ahmed H. Hassanin ◽  
Ibrahim A. El-Hawary ◽  
Raafat I. Mashaly

2000 ◽  
Vol 32 (1) ◽  
pp. 49-61 ◽  
Author(s):  
Darren Hudson ◽  
Don Ethridge

AbstractThe impacts of using export taxes as a price control in a multi-market framework are explored using the cotton and yarn sectors in Pakistan as examples. Results show that the export tax on cotton increased domestic consumption and decreased exports of cotton in Pakistan, transferring income from cotton producers to yarn spinners and the government. There was a social loss to Pakistan in the cotton sector. The export tax on cotton increased domestic yarn production, consumption, exports, and incomes of yarn spinners, but resulted in a large transfer (social loss) out of the yarn sector.


1970 ◽  
Vol 3 (2) ◽  
pp. 101-111
Author(s):  
P. Chellasamy ◽  
N. Sumathi

The textile and garment industry fulfils a pivotal role in the Indian economy. It is a major foreign exchange earner and, after agriculture, it is the largest employer with a total workforce of 35 mn. In 2005 textiles and garments accounted for about 14% of industrial production and 16% of export earnings. In cotton yarn production India has made a mark in the world textile scenario. It is the largest exporter of the cotton yarns in the world. Besides yarn exports, India’s growing garment industry is working as a driving force to improve the yarn quality and to increase the production of cotton yarn. This has resulted in an overall improvement in the quality of all textile products including yarn and fabric. The WTO era has seen remarkable improvement in export of textiles. To help the mills in bench marking, SITRA has conducted a survey on the cotton yarn quality for fine and superfine yarns, in which 58 mills from all over India have taken part.


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