摘要:

This paper describes a quantitative X-ray-diffraction investigation into the effects of the time of heating native and mercerized cotton fibres at 220°C on the crystallographic order. It is concluded that thermally induced structural modifications are time-dependent and that dissimilar mechanisms operate in the two specimens examined. For example, it appears that an initial recrystallization occurs in native fibres, whereas in mercerized specimens degradation of order increases continuously with the time of heating.

ISSN:0040-5000    

DOI:10.1080/00405007608630576

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

An investigation is described in which jute filaments obtained from breaker-card sliver were subjected to the following treatments: (i) samples were made moisture-free but retained the batching oil; (ii) samples were made both moisture-free and oil-free; (iii) moisture-free and oil-free samples were soaked in water and again made moisture-free. Jute filaments were also obtained from raw fibre and from raw fibre from which natural fat and wax had been removed. The X-ray crystallinity was determined for all the samples in the moisture-free condition. The results obtained are explained on the basis of a paracrystalline structure of cellulosic fibre, some regions of which are capable of diffracting X-rays and at the same time are accessible to moisture. It has been proposed that, when the fibre is treated with an oil–water emulsion, water molecules penetrate into the amorphous regions and into portions of the region of intermediate order (paracrystalline), the resultant swelling then producing fissures that oil particles in the emulsion enter and in which they anchor themselves like wedges. These anchored oil particles are retained when the absorbed moisture (the water molecule) gradually evaporates to leave the structure in a less crystalline state. Rigidity values of the variously treated jute filaments support this view.

ISSN:0040-5000    

DOI:10.1080/00405007608630577

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

This paper describes a model of relaxed plain weft-knitting and, by consideration of the forces acting between loops, both in the interlacing region and at possible course- and wale-jamming points, derives equations whose numerical solution gives the loop shape, fabric dimensions, and magnitudes of the forces and couples acting on the yarn.

ISSN:0040-5000    

DOI:10.1080/00405007608630578

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

Corona treatment of viscose–cotton blends enhances sliver tenacity and wettability. The effects depend on the degree of treatment, which increases with the corona power, the time in the corona, and the number of passages through the corona.

ISSN:0040-5000    

DOI:10.1080/00405007608630579

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

The application of the technique of the central compound rotatable designs of Box and Hunter to the optimization of an open-end-spinning process is studied, and the advantages of using a minicomputer for such an analysis are discussed.

ISSN:0040-5000    

DOI:10.1080/00405007608630580

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

摘要:

Wool-polyester-fibre and particularly wool-nylon blends show a significant negative deviation of limiting-oxygen index (LOI) from the average, calculated values. This is probably due to the higher heat of combustion and lower LOI of polyester fibre and particularly of nylon when compared with wool.

ISSN:0040-5000    

DOI:10.1080/00405007608630581

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

ISSN:0040-5000    

DOI:10.1080/00405007608630582

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

ISSN:0040-5000    

DOI:10.1080/00405007608630584

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

ISSN:0040-5000    

DOI:10.1080/00405007608630585

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor

ISSN:0040-5000    

DOI:10.1080/00405007608630586

出版商:Taylor & Francis Group    

年代:1976

数据来源: Taylor