Showing posts from September, 2023

Textile Printing Process Flow Chart

  Textile Printing Process Flow Chart Introduction Textile Printing involves localised colouration. This is usually achieved by applying thickened pastes containing dyes or pigments onto a fabric surface according to a given colour design. In particular, the viscosity of a print paste is critical. It determines the volume of paste transferred to the fabric and the degree to which it spreads on and into the surface yarns. The paste must colour all the visible fibres on the printed surface, so it must penetrate somewhat into the yarn structure. If the paste is too 'thin', it will spread, giving poor print definition, and penetrate too far into the yarns decreasing the colour yield. Printing was originally done by hand using wooden blocks with a raised printing surface, much as children do potato printing. The two main techniques used for transferring paste onto fabrics involve engraved rollers carrying paste in the recesses corresponding to the colour pattern, or screens with the

Sizing Process In Weaving: Objectives, Functions, Types, Advantages and Disadvantages

  Sizing Process The method of applying gelatinous film-forming substance on warp is called sizing. Sizing is termed the "heart of weaving". Technically, it is the process of giving protective clothing on the warp yarn to minimize yarn breakage during weaving. Sizing is mainly done on woven fabrics Denim garments and terry towels. Objectives of Sizing To help the fiber from abrasion to the head reed To improve the breaking strength of cellulosic fiber To improve the smoothness of yarn To improve the elasticity of yarn To decrease the hairiness of yarn To decrease the static electricity formation Technical Changes Due to Sizing To increase abrasion resistance To increase the breading strength To increase the fiber smoothness To increase the elasticity To increase the actual dia To decrease the fiber hairiness To decrease the formation of static electricity Sizing Process Flow Chart: Warping Beam Sizing Drying  Leasing Weaver's Beam Chemicals Used for Sizing Process 1. Adhe

Winding Process in Weaving: Objectives, Parameter, Packages and Advantages

  Winding Process in Weaving Winding is a process of transferring yarn from rings, bobbins, hanks, etc. into a convenient form of a package containing a considerably long length of yarn. This simple transfer of yarn from one package to another large package is called winding.  Objectives of Winding:  To get a suitable package To get a quality fabric To empty the spinner bobbin so that it can again in spinning time To clean the yarn To store the yarn To shorter the labor of the worker To improve the efficiency of yarn in the next process. Requirements of Winding: Minimum fault level No change of yarn Easy winding Suitable size and shape of a package Economical condition Avoid excess looseness and tightness  Cheap cost of package Winding Parameter Winding rate = m/min Winding dia = cm Yarn traverse velocity = m/s Angle wind = 0 Surface velocity = m/min Net winding velocity = m/min Types of Packages Used in Winding: Cone Winding:     Cone winding is the process of wounding the tube yarn i