Abstract
Properties of the fibrous material which has oriented supermolecular formations are depended on such structural factors as morphology, inter position of structure elements, and their interaction. Influence of processing on changing original structure of fibrous material during mechanical processing that causes deformation at loading is determined by peculiarities of its structure. Reversible and irreversible changes of structural elements in fibrous material causes changing of volume and sorption properties and will essentially influence on its chemical finishing processes. Influence of twisting degree and number of silk cords on structure and physical mechanical properties. Changing of supermolecular structure of thread in the process of its forming by X-ray graphic, sorption and focused beam electronic microscopic methods was researched.
Highlights
In mechanical technology at rewinding, twisting and weaving silk threads are subjected to deformation which causes reconstruction of separate filaments in threads and of structural elements in amorphous and crystalline parts of supermolecular silk structure.The analysis of a priori and periodic literary sources has shown that mainly the influence of twist and linear density of crape threads on mechanical and working properties of crape fabrics were researched
Reversible and irreversible changes of structural elements in fibrous material causes changing of volume and sorption properties and will essentially influence on its chemical finishing processes
Changing the quantity of cords in crape threads with twist 2200 tw/m causes increasing of breaking load of the fabric, durability of angle fastening in the fabric, rubbing resistance and fabric capillarity, as filling of the fabric and its thickness increase
Summary
In mechanical technology at rewinding, twisting and weaving silk threads are subjected to deformation which causes reconstruction of separate filaments in threads and of structural elements in amorphous and crystalline parts of supermolecular silk structure.The analysis of a priori and periodic literary sources has shown that mainly the influence of twist and linear density of crape threads on mechanical and working properties of crape fabrics were researched. The author of the work [1] researched physical-mechanical and working properties of crape threads samples with different linear density, twisting and number of cords. Changing the quantity of cords in crape threads with twist 2200 tw/m causes increasing of breaking load of the fabric, durability of angle fastening in the fabric, rubbing resistance and fabric capillarity, as filling of the fabric and its thickness increase. Increasing twists up to 3200 tw/m causes significant decrease of rubbing resistance of the fabric, and breaking load and durability of threads fastening in fabrics change very little. Using natural silk for making knitted goods, the influence of cord and twist number on physical and mechaniccal properties of silk threads were investigated in the work [2]
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