Textile Diploma Educational Institutes in Bangladesh

The textile industry is in a period of rapid and revolutionary modernization and automation in Bangladesh. The engineers graduated in Textile Engineering are equipped with the knowledge of the behavior of textile materials and the functions of machinery in textile and clothing technologies. Textile Engineering deals with the application of scientific and engineering principles to the design and control of all aspects of fiber, textile, and apparel processes, products, and machinery.

Introduction of Flax and Hemp | Difference between Flax and Hemp

Flax (in fibre form) is practically undifferentiated from hemp, which threatens possible confusion with the latter, which is considerably different in price. Flax and hemp are cellulose fibres produced from stocks of row material. Their properties are similar and they are scarcely differentiated at the fibre form. Analytical differentiation is complicated by strong interventions into these fibres during the textile treatment, which is similar in both flax and hemp: the fibres are separated, blanched, and undesirable additions are removed.

Working Process of Roller hank dyeing machines

These machines are based on Hussong type of hank dyeing machines in design .These machines are very simple in design and operation. In the basic design of machine there is rectangular SS tank with proper heating mechanism (either a heating coil or direct steam injection through a perforated steam pipe) and have a false bottom above the heating coil.

The tank is fitted with a temperature indicator and control sensor. There is an array of SS rollers/poles which are fitted on a suitable frame.

Different Types of Computer Color Matching Systems ( CCMS ) | Functions & Advantages

First in 1963, ICI, Dyestuff division established the Computer System for color match prediction in their lab, but it was for their customer only.
Later in 1973, ICS (international color system), manufactured computer matching system commercially
The basic three things are important in CCMS: -

1. Color measurement Instrument (Spectrophotometers).
2. Reflectance (R%) from a mixture of Dyes or Pigments applied in a specific way.
3. Optical model of color vision to closeness of the color matching (CIE L*A*B).

Description of Beam Dyeing Machines

Beam Dyeing Machines

A machine for dyeing yarns or fabrics that have been wound onto a special beam that has evenly perforated holes along its barrel. The dye is forced through the barrel into the yarn/fabric from inside to outside and vice versa. The beam dyeing machines may be capable of dyeing a single beam or to dye multiple beams. The fabric or yarn have better dyeing results because of there is no dimensional changes as well as there is no mechanical force applied to it. The high performance pumps circulate the dye liquor in efficient manner to achieve even dyeing results.

Description of Optical Brightening Agents (OBA)

The coloring matter ,whether it is natural or present as a contaminant in the fiber is generally decolorized by different bleaching methods. However the appearance of the textile substrate is somewhat creamish after the bleaching, therefore chemical treatments are become necessary to neutralize the yellow tint of the textile fibers.

Description of Hank Dyeing Machines

Processing of yarn in hank form
 Why hank dyeing?
Although package dyeing route is much simple and easy to follow for dyeing of different kinds of yarn,but still the hank route is popular for certain qualities, there are two reasons for this,
1.The quality and nature of the product does not allow to follow package route
2.The package route is non practical and non economical.

Working Process of Winch Dyeing Machines

A dyeing machine consisting essentially of a dye vessel fitted with a driven winch ( usually above the liquor level) which rotates and draws a length of fabric, normally joined end to end, through the liquor.

Winch dyeing machines are a low cost design that is simple to operate and maintain, yet versatile in application proving invaluable for preparation, washing or after treatments

Introduction of Environment Management in Textile Industry

An Environment Management System (EMS) is a tool for managing the impacts of an organisation's activities on the environment. It provides a structured approach to planning and implementing environment protection measures.

Like a financial management system monitors expenditure and income and enables regular checks of a company's financial performance, an EMS monitors environmental performance. An EMS integrates environmental management into a company's daily operations, long term planning and other quality management systems.

How many methods of forming yarn into needle loops

There are three methods of forming the newly-fed yarn into the shape of a needle

loop:

1 (Fig. 1) – by sinking the yarn into the space between adjacent needles using

loop forming sinkers or other elements which approach from the beard side.The

action of a straight bar frame is illustrated. (Other obsolete circular bearded

needle machines such as the sinkerwheel and loopwheel frame employ the same

technique.) The distance SL, which the catch of the sinker moves past the beard

side of the needle, is approximately half the stitch length,

Basic mechanical working process of sinker in knitting technology

The sinker is the second primary knitting element (the needle being the first). It is

a thin metal plate with an individual or a collective action operating approximately

at right angles from the hook side of the needle bed, between adjacent needles. It

may perform one or more of the following functions, dependent upon the machine’s

knitting action and consequent sinker shape and movement:

Loop formation

Holding-down

Knocking-over

Physical Properties of Cotton Fiber | End Uses of Cotton Fiber

Cotton Fiber:

Among the seed and fruit fibres, cotton has grown in stature as the most important textile fibre in the world. In fact, cotton is the backbone and basic foundation of the world’s textile trade and industry. Cotton is a natural vegetable fibre produced in the cotton plant in many countries of the world even in Bangladesh also. 

The knitting action of the circular rib machine

                            

                        The knitting action of a circular rib machine is shown in Fig. 

(a) Clearing. The cylinder and dial needles move out to clear the plain and rib

loops formed in the previous cycle.

(b) Yarn Feeding. The needles are withdrawn into their tricks so that the old loops

are covered by the open latches and the new yarn is fed into the open hooks.