Monthly Archives: August 2014

General Concept About Jute Spinning Process || Batching To Winding

Jute fiber is the golden fiber. This fiber is used for manufacturing different types of environment friendly products. Day by day the demands of jute goods are increasing rapidly. Lots of jute mills are established to satisfy the present requirement of jute goods. So, one should have the knowledge about the processing line up of jute products manufacturing.

Two types of jute mills are generally established, one types produces yarn only and others manufacturing both yarn and finished goods (Hessian, Sacking or CBC). Here I like to give concept about spinning unit which is started from batching unit to winding unit.

Spinning division is divided into following:

  • Batching
  • Carding
  • Drawing
  • Spinning
  • Winding

Batching: Batching is the first section of spinning division. Raw jute is entered in this section which is processed here by the help of softener or spreader machine. Emulsion is applied on jute by this machine. This emulsion is the combination of JBO, Water and Emulsifier. Then, jute fiber is placed for pilling.

Purpose of batch section:

  1. To produce qualified yarn.
  2. To control the batch value.

Carding: Carding is the second section of jute spinning. In the mill, drawing and carding section is combindly called as preparing section. Carding is called the heart of spinning. Main objects of carding are to produce straight and parallel fiber, to remove dust and small fiber.

Two types of carding machines are used. They are-

  1. Breaker card: Breaker card is used to produce sliver roll to facilities next process. Long jute is feed in the feeding side of the breaker card. In breaker card, 32 lbs are feed within 1 clock length.
  2. Finisher card: finisher card is used to make more parallel the fibers. It is used to select a batch for produce selected count. Two types of finisher card are available. One is half circular another is full circular machine.

Draw frame: Draw frame is used to reduce weight in per unit length. By using drawing roller, length of finisher roll sliver is elongated. The setting of drawing unit is varying for CBC, Hessian and Sacking unit. Normally, 1st drawing, 2nd drawing and 3rd drawing are used for CBC and Hessian. On the other hand, 1st drawing and finisher drawing is used for Sacking Weft unit.

Spinning: Spinning frame is used to produce yarn from drawn sliver. Sliver is feed to drafting zone and twisting is done by the flyer. Twisted yarn is worned on the bobbin. Generally, two types of draft is use-

  1. Apron draft
  2. Slip draft

Warp spinning frame (4.25”) contains 100 spindles (CBC, Hessian warp & weft and Sacking Warp). 5.25” spinning frame is used for sacking weft side, which contains 80 spindles.

Different count yarn is produced in the spinning frame. Follings are the range of yarn count:

3.5-6 lbs/spyndle is for fine yarn.

6.5-8.5 lbs/spyndle is for CBC yarn.

7-9 lbs/spyndle is for hessian warp yarn.

7-12 lbs/spyndle is for hessian weft yarn.

8-10 lbs/spyndle is for sacking warp yarn.

20-40 lbs/spyndle is for sacking weft yarn.

Winding: Winding is the last section of jute spinning. Two types of winding is use, they are-

  1. Cop Winding (produce weft yarn)
  2. Spool or roll winding (produce warp yarn).

After winding section, twin yarn is produced. Spool and cop are delivered into weaving section to produce finished jute goods.

So, that’s the short concept about jute spinning.

What Is Medical Textile? || Process Flow Chat Of Medical Textile Technology

Medical textile is the most advanced technology in textile sector. It is the important technical textile. Medical textile is generally used for medical purposes in first aid purpose or clinical and surgery division. Medical textile products includes surgical drapes, surgical gowns, pads, masks, dressings, filtration materials, tissue scaffolds for rebuilding internal organs and many more. This type of medical textile is used for protective and health care purpose.

Process Flow Chat of Medical Textile Technology: Medical textile products are prepared in a line of process. Higher textile technology is used for manufacturing medical textile products. Special types of machineries are used for producing medical textile products. Followings are the most common procedure of manufacturing medical textile products:

Polymer

Spinning

Yarn modification

Textile production

Tailoring

Testing

Textile implements

Above flow chat is the simple line up for medical textile technology.

Geo Textiles || Functions Of Technical Geo Textiles

Geo textile is the most important technical textile. It is used to protect the environment from the different bad affects of the world. Geo textiles are used in road infrastructure, railways, waste landfills, dams, irrigation, hydraulic structures etc.

Functions of Technical Geo Textiles: Functions of geo textiles are given below:

Reinforcement: Reinforcement is the most important function of geo textiles. Composite technical geo textile materials allow water flow within the plane surface of the water, rather than across it. This behaves like a retaining wall behind water. By the EN ISO standards, the reinforcement function is defined as “The use of the stress-strain behavior of a geo textile or a geo textile-related product to improve the mechanical properties of soil or other construction materials”.

Separation: Basically geo textile is used for separation and it is widely used in railway and road work construction. Geo textile preserves the integrity and extends the life of the road surface layer. Geo textile materials placed between different layers in the construction, it prevents migration and mingling of materials. It also allows free movement of water. By the EN ISO standards, the separation function is defined as “The preventing from intermixing of adjacent dissimilar soils and/or fill materials by the use of a geo textile”.

Filtration: By the EN ISO standards, the filtration function is defined as “The restraining of soil or other particles subjected to hydrodynamic forces while allowing the passage of fluids into or across a geo textile”. Geo textile material also used to filter. It allows water movement while preventing movement of soil particles.

Surface Erosion Control: Geo textile also used to control the surface erosion. When water flows over the surface it causes erosion, by using geo textile it is possible to control the erosion.

Protection: By the EN ISO standards, the protection function is defined as “The prevention or limiting of local damage to a given element or material by the use of a geo textile”. Waste disposal system and tunnel constructions are also depends on geo textiles. It is used as geo-membrane. It ensures the integrity of sealing materials when fill material and load are applied.

Drainage: By the EN ISO standards, the drainage function is defined as “The collecting and transporting of precipitation, ground water and/or other fluids in the plane of the geo textile”. For drainage in earth and construction works, geo textiles are widely used. In drainage system, geo textiles are used to flow water over the plane surface of the soil with minimum pressure of the water over soil. This function is different from the filtration.

Stress Relieving: Geo textile also used as a stress relieving materials.

So, there are lots of functions of geo textiles.