Name of Expt.: Determination Of Relative Humidity By Wet And Dry Bulb Hygrometer. Objects : To find out the temperature and relative humidity of lab room Theory: Relative humidity is the ratio of actual vapour pressure to the saturated vapour pressure of the same temperature. Expressed as percentage. Relative humidity = actual vapour pressure/standard vapour […]
Introduction to Desizing of Warp Yarns
Introduction to Sizing Introduction to Desizing of Warp Yarns Desizing : Desizing is the process in which the size applied to the warp yarn before weaving is removed to facilitate the penetration of dyes and chemicals in the subsequent wet processing operations. In the process of desizing, not only sizing agents, but also some natural […]
Introduction to Sizing of warp yarns
Introduction to Desizing of Warp Yarns Introduction to Sizing of Warp Yarns Textile Sizing : The process of applying a protective adhesive coating upon the yarn surface is called textile sizing. This is the most important operation to attain maximum weaving efficiency specially for blended & filament yarns. Different types of sizing are used like […]
Reflection and Luster
When light falls on the fiber, part of light is reflected. The luster of a single fiber is determined by the total visual appearance of these reflections from the fiber surface. It is directly proportional to the amount of light reflected by a fiber. Silk fibers has a high luster and cotton has low luster.
Swelling of fibre and Types of swelling
Dimensionally changes due to absorbing water or moisture by any fiber is known as swelling. When fiber absorbs water they change dimensionally. Swelling occurs in transversely (width wise) and axially (Lengthwise). It may be expressed in terms of the increase in diameter, area, length or volume.
Birefringence | Fiber Birefringence
The difference between the refractive index indices of the fiber in a direction at parallel to the fiber axis and in a direction at right angles to the fiber axis is called birefringence of that fiber. Birefringence is responsible for the phenomenon of double reflection.
Optical Properties of Textile Fibers
Part 1: Optical Properties of Textile Fibers Part 2: Birefringence | Fiber Birefringence Part 3: Reflection and Luster Optical Properties of Textile Fibers Optical Properties When light falls on a fiber, it may be partly transmitted, absorbed or reflected, depending on the structure of the light. The transmission, reflection and absorption of light determine the […]
Physical Properties of Polymers
Physical Properties of Polymers Polymer: A chemical compound or mixture of compounds formed by polymerization and consisting essentially of repeating structural units is called ‘Polymer’. Polymers range from familiar synthetic plastic such as polystyrene to natural bio-polymers such as DNA and proteins that are fundamental to biological structure and function. Physical Properties: Physical properties of polymers […]
Fabric Tearing Strength Test
Fabric Tearing Strength Test Tearing strength: A fabric tears when it is snagged by a sharp object and the immediate small puncher is converted into long rip by what may be a very small extra effort. It is probably the most common type of strength failure of fabrics in use. It is particularly important in […]
All Textile Abbreviations | Abbreviation Related to Textiles
Abbreviation Related to Textiles | All Textile Abbreviations ASTM – American Society for Testing Materials AAMA– American Apparels Manufacturing Association AAQC-American Apparels Quality control AAQC– American Association of Quality Control AAMC-American Apparel Manufacturing Corporation ASQC– American Society for Quality Control BGMEA– Bangladesh Garments Manufacturers & Exporters Association BCCFA– Bangladesh Custom Clearing & Forwarding Agent BCI -Bangladesh Commerce & […]