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Bragantia

On-line version ISSN 1678-4499

Bragantia vol.29 no.unico Campinas Jan. 1970

http://dx.doi.org/10.1590/S0006-87051970000100029 

Inter-relações das características tecnológicas da fibra e outras propriedades do algodão com as características do fio e com a produção*

 

Interrelationship between cotton fiber quality and field properties as related to cotton yield, yarn strength and appearance

 

 

José Fernando Lazzarini

Engenheiro-agrônomo, Seção de Tecnologia de Fibras, Instituto Agronômico

 

 


SINOPSE

As características tecnológicas da fibra — comprimento (UHM), uniformidade, resistência e índice micronaire — e mais a porcentagem de fibra, o pêso de 1 capulho e o pêso de 100 sementes foram estudados em relação à produção do algodão em caroço, resistência e aparência do fio.
Foram calculadas várias equações, através de análises de regressão múltipla, para mostrar o grau de associação entre as três características consideradas respostas e as sete variáveis independentes mencionadas. Através da análise de regressão múltipla foi possível determinar a ordem de importância de cada variável em relação a uma resposta específica.
O estudo foi realizado em 57 algodões diferentes, compreendendo variedades e linhagens, num total de 801 amostras, provenientes de nove localidades do Estado de São Paulo.


SUMMARY

A study is presented regarding the relationship between cotton fiber and field properties and three responses: cotton yield yarn, strength and yarn appearance. Fiber properties such as upper half mean length, length uniformity, strength and micronaire fineness, and other characteristics such as percent lint, weight of one boll and weigth of 100 seeds are studied in relation to cotton yield, yarn strength and yarn appearance.
Statiscal models were developed through multiple regression analyses to show the degree of relationship between three responses (cotton yield, yarn strength and appearance) and seven independent variables. Multiple regression analyses were carried out to determine the order of importance of each independent variable in relation to a specific response.
The 57 cotton strains and varieties used in this study were obtained from 9 locations troughout the State of São Paulo, in a total of 801 samples.


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

LITERATURA CITADA

1. AHMAD, N. A. Review of the position regarding relation of fiber properties to spinning performance of Indians cotton. In: Second Conference of Scientific Research Workes on Cotton in India. Bombay, Indian Central Cotton Committee. 1941.         [ Links ]

2. ________& NAVKAL, H. New prediction formulae for Indians cotton. In: Third Conference on Cotton Growing Problems in India. India Central Cotton Committee, 1946. v.2, p.216-226.         [ Links ]

3. A S T M standards on textile materials. Philadelphia, American Society for Testing and Materials, 1963.         [ Links ]

4. FIORI, L. A. & BROWN, J. J. Effect of cotton fiber fineness on the physical properties of single yarn. Textile Research Journal 21(10):750-757, 1951.         [ Links ]

5. ________; ________ & SANDS, J. E. Effect of cotton fiber strength on single yarn properties and processing behavior. Textile Research Journal 24(6) :503-507, 1954.         [ Links ]

6. NAVKAL, H. & SEN, D. L. Prediction of the spinning value of cotton belonging to different botanical species from their chief fibre properties. Indian Cotton Growing Review 11:44-360, 1949.         [ Links ]

7. ________& VENKATARAMAN, V. The prediction of the spinning value of cotton from its fibre properties. Journal of Textile Institute 25(l):T1-48, 1934.         [ Links ]

8. WATERS, W. T. & FIORI, L. A. Why do ends come down in spinning? Textile Industries 126(5):100-106, 1962.         [ Links ]

9. ________; PHILLIPS, J. & FIORI, L. A. Report on the effect of cotton fiber properties and spinning processing variables on yarn properties and processing performance. Part 1. The relation of fiber strength. Textile Bulletin 88(12):29-33, 1962.         [ Links ]

10. WEBB, R. W. Relationship between properties of cotton fibers and strength of carded yarns. Washington, U.S.D.A., War Food Administration, Officee of Marketing Service, 1945.         [ Links ]

11. ________. Equations for predicting cotton processing performance and product quality by improved evaluations of raw cotton quality. Washington, U.S.D.A., Agricultural Marketing Service, ..... (Marketing Research Report 114)        [ Links ]

12. ________. Interrelationships among five cotton quality factors including fiber strength 1/8 inch vs 0 gauge, as related to yarn strength at three staple length levels. Washington, U.S.D.A., Agricultural Marketing Service, 1965. (Marketing Research Report 684)        [ Links ]

13. ________& RICHARDSON, H. B. Relationship of six elements of cotton quality to strength of 22's yarn (regular draft) by crop year, variety and staple length. Washington, U.S.D.A., Production and Marketing Administration, Cotton Branch, 1949.         [ Links ]

 

 

Recebido para publicação em 16 de junho de 1970.

 

 

* Este trabalho foi extraído da tese de Master of Science, apresentada pelo autor ao Departamento de Tecnologia Têxtil da Universidade Estadual da Carolina do Norte, E.U.A., em 1966.