Monthly Archives: December 2013

Important fiber properties considered for spinning.

Important properties considered for spinning:

  1. Fibre length & length uniformity.
  2. Fibre strength & elongation.
  3. Fibre fineness.
  4. Fibre maturity.
  5. Fibre cleanliness.
  6. Fibre color.
  7. Fibre stiffness.
  8. Some chemical deposits.

Share (%) of contribution to yarn quality:

Fibre Properties

 

Contribution (%)

For Ring Yarn

For Rotor Yarn

1.Fibre length 22% 12%
2.Fibre uniformity 20% 17%
3. Fibre strength 20% 24%
4. Fibre elongation 05% 08%
5. Fibre fineness 15% 14%
6. Fibre cleanliness 03% 06%
7. Other 15% 19%

 Fibre Length: The average length of spun able fibre is called staple length. Fibre with length of 15-50 mm is preferable for yarn manufacturing.

Influences of fiber length in yarn production & Quality:

  1. Productivity:
  • Long fiber increase production & quality.
  • Higher amount of short influence fiber End breakage  ,Increase quantity of waste  ,Increase Production & Quality .
  1. Yarn Strength: Short fiber reduces yarn strength.
  2. Yarn Evenness: Short fiber causes yarn unevenness.
  3. Yarn Hairiness: Short fiber causes yarn hairiness.

Beside, fiber length has influence on –

Examples of Textiles Used in Agriculture

alliance_img

LANDSCAPE FABRIC

Landscape fabric is used for weed control, a central element in achieving low-maintenance landscaping. Effective weed control means a reduction in actual weeding or in herbicide use-both unsavory landscaping tasks. Thermally spunbonded fabrics are said to be more effective than woven or needle punched geotextiles in preventing fine roots and rhizomes from penetrating the fabric. While woven fabrics are very strong, they offer many spaces for weeds to penetrate. Needle-punched fabrics have loose threads of material that plants can easily grow through. As for thermally spunbonded fabrics, these have fibers fixed in place, keeping roots from penetrating.

WIND PROTECTION FABRIC

Knitted windshield constructed from a commercial grade of U.V. stabilized yarn are often used to protect crops & structures from wind damage. Air exhaust deflection fabrics are otherwise most useful in odor control. These are often seen in swine and dairy house production. Wind protection fabric is available in a variety of aesthetically pleasing colors so structures won’t by an eyesore on the farm. Read the rest of this entry

Fabric Wastage outside the Marker

The maximum usage of the fabric is directly related to the marker efficiency. In spite of this few amount of fabric wastage occurs which is out of control of marker planning. The fabric wastage outside the marker is discussed below

01. Ends of Ply Losses:

Some allowances are needed the end of each pieces of fabric during spreading. Usually 2cm. in each end and on each ply 4 cm. wastage happened. This wastage varies with the fabric type and their durability. For this the wastage can be reduced by controlling carefully the allowance of the marker according to the fabric type. But this loss is less if marker length is higher and vice-versa.

02. Loss of Fabric in Roll:

Fabrics usually come in roll form in garments industries. There are the limitations of fabric length in each roll. Fabric spreading is done according to the marker length. Most of the time it is seen that fabrics are not exact to the multiple lays. For this reason at the end of the roll few amount of fabrics are always wasted as remnant which is cut. We can do splicing & the remaining portion should be reused to save fabric. Read the rest of this entry

Medical Textiles

Medical Textiles

Medical Textiles

Definition: A general term which describes a textile structure which has been designed and produced for use in any of a variety of medical applications, including implantable applications.

An important and growing part of the textile industry is medical, hygiene and health sector. The extent of growth is due to the development and improvement of knowledge in both textile as well as medical sector.

The engineering approach to develop textile products that will be suitable for medical and surgical application should possess a combination of the following properties

Strength, flexibility, and sometimes moisture and air permeability.

Materials include natural fibre, monofilament as well as multifilament yarns.

 The textiles used in medical and surgical purposes can be classified as follows:

  • Nonplantable materials-Wound dressing, bandages, plasters etc.
  • Extracorporeal devices– artificial kidney, liver, and lung
  • Implantable materials-suture, vascular grafts, artificial ligaments, artificial joints, etc.
  • Healthcare/hygiene products-bedding, clothing, surgical gowns, cloths, wipes etc. Read the rest of this entry

Major requirements for a good quality sewing thread

Sewing Threads

Sewing Threads

Tensile strength:

The amount of strength required to break a thread. It varies according to temperature, humidity, rate of applied force, moisture etc. It is expresses in gm, kg, lb, CN etc.

Tensile strength of the thread should be high enough to hold the stitched seam securely during wash and wear.

For coarser thread, Tensile strength is higher and vice-versa.

Tenacity:

Tenacity is the relative thickness of thread expressed in gm/denier, gm/tex etc.

                          Tenacity = (Thread tensile strength/Thread count or thickness).

Sewing threads’ tensile strength depends on count but tenacity is not dependent on count because it is the strength per unit thickness. Read the rest of this entry

Zipper: The continuous fasteners!!

ZIPPERS

ZIPPERS

Evolution of zipper:

  • Zipper is the brainchild of Mr. Whitcomb Judson.
  • It was introduced in 1893 at the Chicago World’s Fair, then with the name ‘Clasp Locker’.
  • Gideon Sundback, an electrical engineer, who was hired to work for the company designed the modern zipper in 1913.
  • B.F. Goodrich Company renamed it as ‘Zipper’.
  • Initially during 1930, zippers were featured in child clothing complementing them for helping children to dress up quickly & by themselves.
  • Zippers came into limelight in 1937 through the French fashion designers who used them on men’s trouser.
  • Esquire magazine described the zippers as ‘Newest Tailoring Idea for Men’.
  • The next big boost for zippers came when they were used on jackets and could be opened on both ends. Read the rest of this entry

Role of Order Negotiation in RMG Business

Negotiation

Orders that have been sent to factories will be negotiated for price, delivery, quota and quality etc. The order negotiation between the buyer and the manufacturer is not always an easy task. The buyers are always trying to get this garments made at very low prices whilst the manufacturers are hoping they will get at least 2 per cent more than what they got last time for a similar style.

The buyer always has a target price for the merchandise he hopes to buy. He has already finished his home work and fully aware of the market price for the particular type of garment. Therefore, he will do his best to buy the garments bellow his target price or for his target price. We should not forget the globe is full of manufacturers and suppliers. The buyer will certainly move to another manufacturer or country if he fails to buy at his price.
On the other hand, the manufacturers will promise the best quality and prompt delivery to convince the buyers to pay extra dollar or two for his merchandise. It is rather difficult to convince a buyer to pay more than his target price, but it may be possible to do so if the company has a good relationship with the buyer or if the company has a very good reputation for excellent performance. In other words a good image should do the trick. Read the rest of this entry

Pros and Cons of garment industry: Future prospects and challenges of Bangladesh Garment Business

Author: Joy Sarkar

Written: May, 2013

Published : December, 2013

Store showing that, they don’t source from Bangladesh

Store showing that, they don’t source from Bangladesh

ABSTRACT

The importance of the textile industry in the economy of Bangladesh is very high. The garments manufacturing sector earned $19 billion in the year to June 2012, one of the impoverished nation’s biggest industries. Currently this industry is facing great challenges in its growth rate. The major reasons for these challenges can be the global recession, unfavorable trade policies, internal security concerns, the high cost of production due to increase in the energy costs, different safety issues specially fire, etc. Depreciation of Bangladeshi Taka that significantly raised the cost of imported inputs, rise in inflation rate, and high cost of financing has also effected seriously the growth in the textile industry. As a result neither the buyers are able to visit frequently Bangladesh nor are the exporters able to travel abroad for effectively marketing their products. With an in-depth investigation it was found that the Bangladesh textile industry can be brought on top winning track if government and others individuals takes serious actions in removing or normalizing the above mentioned hurdles. Additionally, the government should provide subsidy to the textile industry, minimize the internal dispute among the exporters, withdraw the withholding and sales taxes etc. Purchasing new machinery or enhancing the quality of the existing machinery and introducing new technology can also be very useful in increasing the research and development (R and  D) related activities that  in the modern era are very important for increasing the industrial growth of a country.  Read the rest of this entry

%d bloggers like this: