1. What is textile
THE WORD ''TEXTILE'' ORIGINALLY APPLIED ONLY TO WOVEN
FABRICS, NOW GENERALLY APPLIED TO FIBERS, YARNS, OR
FABRICS OR PRODUCTS MADE OFFERS, YARNS OR FABRICS. THE
TERM TEXTILE ORIGINATES FROM THE LATIN VERB TEXERE TO
WEAVE.
2. Write a note on history of textile
Linen fabrics were discovered in Egypt around 5000 B.C.
Woolen textiles from the early Bronze Age in Scandinavia and
Switzerland have also been found centuries ago.
Cotton has been spun and woven in India since 3000 B.C.
Silk has been woven in China since 1000 B.C.
The first synthetics were made in the1920s and 1930s.
3. Textile materials and processes.
Textile manufacturing is a major industry. It is largely based on the conversion of fibre into yarn,
then yarn into fabric. These are then dyed or printed, fabricated into cloth which is then
converted into useful goods such as clothing, household items, upholstery and various
industrial products. Overall, many things can be made with cotton, not just clothing.
Different types of fibers are used to produce yarn. cotton remains the most widely used and
common natural fiber making up 90% of all-natural fibers used in the textile industry. People
often use cotton clothing and accessories because of comfort, not limited to different weathers.
There are many variable processes available at the spinning and fabric-forming stages coupled
with the complexities of the finishing and colouration processes to the production of a wide
range of products.
4. 1. Cotton :-
Cotton is the world's most important natural fibre. In the year 2007, the
global yield was 25 million tons from 35 million hectares cultivated in more
than 50 countries.
There are six stages to the manufacturing of cotton textiles:
Cultivating and Harvesting
Preparatory Processes
Spinning
Weaving or Knitting
Finishing
Marketing
5. Cultivating and harvesting:-
Cotton is grown in locations with long, hot, dry summers with plenty of sunshine and low humidity. Indian
cotton, Gossypium arboreum, is finer but the staple is only suitable for hand processing. American cotton, Gossypium
hirsutum produces the longer staple needed for mechanized textile production. The planting season is from September
to mid-November, and the crop is harvested between March and June. The cotton bolls are harvested by stripper
harvesters and spindle pickers that remove the entire boll from the plant.
Ginning:-The seed cotton goes into a cotton gin The cotton gin separates seeds and removes the trash (dirt, stems and
leaves) from the fibre. In a saw gin, circular saws grab the fibre and pull it through a grating that is too narrow for the
seeds to pass. A roller gin is used with longer-staple cotton. Here, a leather roller captures the cotton. A knife blade, set
close to the roller, detaches the seeds by drawing them through teeth in circular saws and revolving brushes which clean
them away. The ginned cotton fibre, known as lint, is then compressed into bales which are about 1.5 m tall and weigh
almost 220 kg. Only 33% of the crop is usable lint. Commercial cotton is graded and priced according to its quality; this
broadly relates to the average length of the staple and the variety of the plant.
Preparatory processes – preparation of yarn:-
Opening and cleaning
Cotton is shipped to mills in large 500-pound bales. When the cotton comes out of a bale, it is all packed together and still
contains vegetable matter. The bale is broken open using a machine with large spikes, called an opener. To fluff up the cotton
and remove the vegetable matter, the cotton is sent through a picker or a similar machine. In a picker, the cotton is beaten
with a beater bar to loosen it up. It is then fed through various rollers, which serve to remove the vegetable matter
6. • Blending, Mixing and Scutching:-
Scutching refers to the process of cleaning cotton of its seeds and other impurities. The first scutching machine was
invented in 1797, but did not come into further mainstream use until after 1808 or 1809, when it was introduced and used
in Manchester, England. By 1816, it had become generally adopted. The scutching machine worked by passing the cotton
through a pair of rollers, and then striking it with iron or steel bars called beater bars or beaters. The beaters, which turn
very quickly, strike the cotton hard and knock the seeds out. This process is done over a series of parallel bars so as to
allow the seeds to fall through. At the same time, air is blown across the bars, which carries the cotton into a cotton
chamber.
• Carding:-
In the carding process, the fibres are separated and then assembled into a loose strand (sliver or tow). The cotton comes
off of the picking machine in laps, and is then taken to carding machines. The carders line up the fibres neatly to make
them easier to spin. The carding machine consists mainly of one big roller with smaller ones surrounding it. All of the
rollers are covered in small teeth, and as the cotton is moved forwards, the teeth get finer .The cotton leaves the carding
machine in the form of a sliver: a large rope of fibres
7. Spinning – yarn manufacture:-
Most spinning today is done using break, or open-end spinning. This is a technique where the fibres are blown by air into a
rotating drum, where they attach themselves to the tail of formed yarn that is continually being drawn out of the chamber.
Other methods of break spinning use needles and electrostatic forces.[This method has replaced the older methods of ring
and mule spinning. It is also easily adapted for artificial fibres.
The spinning machines takes the roving, thins it and twists it, creating yarn which it winds onto a bobbin.
In mule spinning the roving is pulled off a bobbin and fed through rollers, which are feeding at several different speeds.
This thins the roving at a consistent rate. If the roving was not a consistent size, then this step could cause a break in the
yarn, or jam the machine. The yarn is twisted through the spinning of the bobbin as the carriage moves out, and is rolled
onto a cylinder called a spindle, which then produces a cone-shaped bundle of fibres known as a "cop", as the carriage
returns. Mule spinning produces a finer thread than ring spinning.
The mule was an intermittent process, as the frame advanced and returned a distance of five feet. It was the descendant of
the 1779 Crompton device. It produces a softer, less twisted thread that was favoured for fine fabrics and wefts.
The ring was a descendant of the Arkwright Water frame of 1769. It was a continuous process, the yarn was coarser, had a
greater twist and was stronger, thus suitable for use as warp thread. Ring spinning is slow due to the distance the thread
must pass around the ring Sewing thread was made of several threads twisted together, or doubled.
• Checking
This is the process where each of the bobbins is rewound to give a tighter bobbin.
• Folding and twisting
Plying is done by pulling yarn from two or more bobbins and twisting it together, in a direction opposite to the one it was
spun in. Depending on the weight desired, the cotton may or may not be plied, and the number of strands twisted
together varies.
Gassing :-
Gassing is the process of passing yarn very rapidly through a series of Bunsen gas flames in a gassing frame, to burn off
8. Weaving:-
The weaving process uses a loom. The lengthwise threads are known as the warp and the crosswise threads are
known as the weft. The warp, which must be strong, needs to be presented to loom on a warp beam. The weft passes
across the loom in a shuttle that carries the yarn on a pirn. These pirns are automatically changed by the loom. Thus,
the yarn needs to be wrapped onto a beam, and onto pirns before weaving can commence.
•Winding:-
After being spun and plied, the cotton thread is taken to a warping room where the winding machine takes the
required length of yarn and winds it onto warpers' bobbins.
•Warping or beaming:-
A Warper Racks of bobbins are set up to hold the thread while it is wound onto the warp beam of a loom. Because the
thread is fine, often three of these would be combined to get the desired number of ends
•Sizing:-
A sizing machine is needed for strengthening the warp by adding starch, to reduce breakage.
•Drawing in, Looming:-
The process of drawing each end of the warp separately through the dents of the reed and the eyes of the healds, in
the order indicated by the draft.
•Pirning (Processing the weft):-
A pirn-winding frame was used to transfer the weft from cheeses of yarn onto the pirns that would fit into the shuttle.
9. Knitting – fabric manufacture:-
Knitting by machine is done in two different ways; warp and weft. Weft knitting (as seen in
the pictures) is similar in method to hand knitting with stitches all connected to each other
horizontally. Various weft machines can be configured to produce textiles from a single
spool of yarn or multiple spools, depending on the size of the machine cylinder (in which
the needles are bedded). In a warp knit, there are many pieces of yarn and there are
vertical chains, zigzagged together by crossing the cotton yarn.
Warp knits do not stretch as much as a weft knits, and they are run-resistant. A weft knit is
not run-resistant, but it has more stretch. This is especially true if spools of elastane are
processed from separate spool containers and interwoven through the cylinder with cotton
yarn, giving the finished product more flexibility and preventing it from having a 'baggy'
appearance. The average t-shirt is a weft knit.
10. Finishing – processing of textiles
Finishing is a broad range of physical and chemical processes/treatments that complete one stage of textile
manufacturing, sometimes in preparation for the next step. Finishing adds value to the product and makes
it more attractive, useful and functional for the end-user. Fresh off the loom, cotton fabric not only contains
impurities, including warp size, but it also requires further treatment to develop its full potential and to add
to its value.
Desizing:-
Depending on the size that has been used, the cloth may be steeped in a dilute acid and then rinsed, or enzymes may be
used to break down the size.
Scouring:-
Scouring is a chemical washing process carried out on cotton fabric to remove natural waxes and non-fibrous impurities (like
the remains of seed fragments) from the fibres and any soiling or dirt that might remain. Scouring is usually carried out in
iron vessels called kiers. The fabric is boiled in an alkali solution, which forms a soap with free fatty acids. A kier is usually
enclosed, so the solution of sodium hydroxide can be boiled under pressure, excluding oxygen, which would degrade
the cellulose in the fibre. If the appropriate reagents are used, scouring will also remove size from the fabric, although
desizing often precedes scouring and is considered to be a separate process. Preparation and scouring are prerequisites to
most of the other finishing processes. At this stage, even the most naturally white cotton fibres are yellowish, and bleaching
is required.
11. Bleaching:-Bleaching improves whiteness by removing natural colouration and whatever impurities remain in the cotton; the degree of bleaching
is determined by the levels of whiteness and absorbency required of the fabric. Cotton, being a vegetable fibre, is bleached using an oxidizing
agent, such as diluted sodium hypochlorite or diluted hydrogen peroxide. If the fabric is to be dyed a deep shade, then lower levels of bleaching
are acceptable. However, for white bedding and for medical applications, the highest levels of whiteness and absorbency are essential.
Mercerising:-A further possibility is mercerising, during which the fabric is treated with a caustic soda solution, to cause swelling of the fibres.
This results in improved lustre, strength and dye affinity. Cotton is mercerise under tension, and all alkali must be washed out before the tension
is released, or shrinkage will take place.
Many other chemical treatments may be applied to cotton fabrics to produce low flammability, crease-resistance and other qualities, but the four
most important non-chemical finishing treatments are:
Singeing:-Singeing is designed to burn off the surface fibres from the fabric to produce smoothness. The fabric passes over brushes to raise the
fibres, then passes over a plate heated by gas flames.
Raising:-During raising, the fabric surface is treated with sharp teeth to lift the surface fibres, thereby imparting downiness, softness and warmth,
as in flannelette.
Calendering:-Calendering is a procecss in which the fabric is passed between heated rollers to generate smooth, polished or embossed effects.
Shrinking:-Sanforisation is a form of mechanical pre-shrinking, so that the fabric will shrink less upon laundering.
Dyeing:-
Dyeing is commonly carried out with an anionic direct dye by completely immersing the fabric (or yarn) in an aqueous dye bath according to a
prescribed procedure. For improved fastness to washing, rubbing and light, further dyeing methods can used. These require more complex
chemistry during processing, and are thus more expensive to apply.
Printing:-
Printing is the application of colour in the form of a paste or ink to the surface of a fabric in a predetermined pattern. It can be described as a
form of localised dyeing. Printing designs onto previously dyed fabric is also possible.
12. Processing of other vegetable
fibres:-
Flax is a best fibre, which means it comes in bundles under the bark of the Linum usitatissimum plant.
The plant flowers and is harvested.
Retting
Breaking
Scutching
Hackling or combing
It is now treated like cotton.
Jute is a best fibre, which comes from the inner bark of the plants of the Corchorus genus. It is retted
like flax, sundried and baled. When spinning a small amount of oil must be added to the fibre. It can be
bleached and dyed. It was used for sacks and bags but is now used for the backing for carpets .Jute can
be blended with other fibres to make composite fabrics and work continues in Bangladesh to refine the
processes and extend the range of usage possible. In the 1970s, jute-cotton composite fabrics were
known as jutton fabrics.
Hemp is a best fibre from the inner bark of Cannabis sativa. It is difficult to bleach, and is used for
making cord and rope.
Retting
Separating
Pounding
13. Processing of wool
Wool comes from domesticated sheep. It is used to create two kinds of yarn, woolens and worsteds. These are distinguished by the
direction of the wool fibres in relation to the thread; woolens are perpendicularly arranged, allowing for fluffy yarns that trap air, while
worsteds have parallel fibres, creating a strong and smooth yarn.
Modern sheep have uniform fleeces, while primitive and landrace sheep often have dual coats; a soft, short under layer and a hardier,
coarser, and longer guard layer. These can be sorted to be processed separately, or spun together. The differing characteristics of each coat
allows for very different yarn; the guard hairs can be used for durable outerwear, while the inner coat is what is traditionally used to
produce the ultrafine wedding ring shawls across Europe. Spinning them together, like in lopi, produces a unique yarn that combines the
strength of the guard hairs with the loft and softness of the undercoat.
Wool that has never been used is known as virgin wool and can be mixed with wool that has been recovered from rags. Shoddy is the term
for recovered wool that is not matted, while mungo comes from felted wool. Extract is recovered chemically from mixed cotton/wool
fabrics.
The fleece is shorn in one piece from the sheep. Ideally, the wool is cut as close to the skin as possible to maximize fibre length. Going
over the same spot twice produces small fibres that will produce pills in finished fabric, something that skilled shearers are usually able to
avoid. This is then skirted to remove the soiled wool from around the legs and anus, graded, and baled. Grading is done on quality as well
as length of the fibres. Long wool fibres can be up to 15 in, but anything over 2.5 inches is suitable for combing into worsteds. Fibres less
than that form short wool and are described as clothing or carding wool, and are best suited for the jumbled arrangement of woolens.
At the mill the wool is scoured in a detergent to remove grease (the yolk) and impurities. This is done mechanically in the opening
machine. Vegetable matter can be removed chemically using sulphuric acid. Washing uses a solution of soap and sodium carbonate. The
wool is oiled before carding or combing.
14. Processing of silk
The processes in silk production are similar to those of cotton but take account that reeled silk is a continuous fibre. Theterms used
are different.
Opening bales. Assorting skeins: where silk is sorted by colour, size and quality, scouring: where the silk is washed in water of 40
degrees for 12 hours to remove the natural gum, drying: either by steam heating or centrifuge, softening: by rubbing to remove any
remaining hard spots.
Silk throwing (winding). The skeins are placed on a reel in a frame with many others. The silk is wound onto spools or bobbins.
Doubling and twisting. The silk is far too fine to be woven, so now it is doubled and twisted to make the warp, known as organize and
the weft, known as tram. In organize each single is given a few twists per inch (tpi), and combine with several other singles counter
twisted hard at 10 to 14 tpi. In tram the two singles are doubled with each other with a light twist, 3 to 6 tpi. Sewing thread is two
tram threads, hard twisted, and machine-twist is made of three hard-twisted tram threads. Tram for the crepe process is twisted at
up to 80 tpi to make it 'kick up'.
Stretching. The thread is tested for consistent size. Any uneven thickness is stretched out. The resulting thread is reeled into
containing 500 yd to 2500 yd. The skeins are about 50 inches in loop length.
Dyeing: the skeins are scoured again, and discoloration removed with a sulphur process. This weakens the silk. The skeins are now
tinted or dyed. They are dried and rewound onto bobbins, spools and skeins. Looming, and the weaving process on power looms is
the same as with cotton.
•Weaving. The organize is now warped. This is a similar process to in cotton. Firstly, thirty threads or so are wound onto a warping reel,
and then using the warping reels, the threads are beamed. A thick layer of paper is laid between each layer on the beam to stop
entangling.
15. Processing of Synthetic fibres
Synthetic fibres are the result of extensive development by scientists to improve upon the naturally
occurring animal and plant fibres. In general, synthetic fibres are created by forcing, or extruding, fibre
forming materials through holes (called spinnerets) into the air, thus forming a thread. Before synthetic
fibres were developed, cellulose fibres were made from natural cellulose, which comes from plants.
The first artificial fibre, known as art silk from 1799 onwards, became known as viscose around 1894,
and finally rayon in 1924. A similar product known as cellulose acetatewas discovered in 1865. Rayon
and acetate are both artificial fibres, but not truly synthetic, being made from wood. Although these
artificial fibres were discovered in the mid-nineteenth century, successful modern manufacture began
much later in the 1930s. Nylon, the first synthetic fibre, made its debut in the United States as a
replacement for silk, and was used for parachutes and other military uses.
The techniques used to process these fibres in yarn are essentially the same as with natural fibres,
modifications have to be made as these fibres are of great length, and have no texture such as the
scales in cotton and wool that aid meshing.
Unlike natural fibres, produced by plants, animals or insects, synthetic fibres are made from fossil fuels,
and thus require no farmland.
16. Types of textile manufacturing
process:-
Traditionally, yarn manufacturing comprises a series of processes involved in
converting the fiber into yarn. It was rooted in natural fibers obtained from
natural plant or animal sources. Natural fibers are produced with natural
impurities that were removed from the yarn in subsequent pretreatment
processes.
cotton is the fiber that has rooted the yarn manufacturing from fiber bale
opening, followed by the series of continuous operations of blending, mixing,
cleaning, carding, drawing, roving, and spinning. All these operations are
mechanical and do not require chemical application.
The study is useful for yarn manufacturing and its development in the textile
industry. Important topics covered include review of yarn production, filament
yarn production, carding and prior processes for short-staple fibers, sliver
preparation, short-staple spinning, long-staple spinning, post-spinning processes,
quality control, and economics of staple-yarn production.
1. yarn manufacturing:-
17. 2.Fabric manufacturing:-
Textile fabric is at least a two-dimensional structure produced by fiber/yarn interlacing. The
interlaced fibrous structure mainly used is woven, nonwoven, and knitted. Traditionally, the
weaving technology was the principal source for fabric production.
The important types of woven fabric produced are the basic weaves, such as plain or tabby,
twill, and satin, and the fancy weaves, including pile, jacquard, dobby, and gauze.
Knitted fabric is the second major type of fabric used following the woven. It has a
characteristic of accommodating the body contour and provided the ease of movement. It is
particularly a comfortable form of fabric structure for sports, casual wear, and undergarment.
Knitted fabrics include weft types and the warp types, raschel, and tricot.
Laminating processes are also increasing in importance, and fairly recent developments
include needle weaving and the sewing-knitting process.
18. 3.Garment manufacturing:-
Garment is known as a piece of clothing. Garment design and manufacturing is the
combination of art and technology.
Garment manufacturing has seen several advancements in design development, computer-
aided manufacturing (CAD), and automation. However, the older version of garment
manufacturing process is still the main theme today—that is, the cutting and joining of at
least two pieces of fabric. The sewing machine has the function of joining woven or cut-
knitted fabrics. Garments are mostly produced by sewing the pieces of fabric using a sewing
machine. These machines are still based on the primary format used.
Today the important topics in the current garment manufacturing industry range over product
development, production planning, and material selection. The selection of garment design,
including computer-aided design, spreading, cutting, and sewing; joining techniques; and
seamless garment construction are beneficial in meeting the consumer needs. The
development in finishing, quality control, and care-labeling of garment are meeting the point-
of-sale requirements.
19. 4.Technical textile:-
Technical textile is an established domain of interdisciplinary application of textile
products. Most of the major industrial sectors are benefiting the function of fiber
material.
Any technical textile is a fibrous structure or a textile product that is produced for
technical performance rather than fashion or aesthetic requirements.
Currently, technical textiles occupy strong market consumption. It is significantly
an important sector for industrial development in industrialized and developing
countries.
20. Value addition in textile
manufacturing
• Pretreatment process:-
Any of fiber substrate including fiber/yarn, fabric, garment, technical textile, etc. may require a series of chemical processing to
reduce the undesired content from the fiber. The selection of any pretreatment process, its composition, and methodology
depends upon the end-use requirement of the textile product.
A pretreatment process is generally required to introduce two important value additions in textile substrate including:
Removing the undesired content from the fiber mass including dust, coloring matters, undesired oils, lint, trash, etc.
Imparting the required level of fiber property for subsequent processing of textile substrate. The required fiber property may
include fabric whiteness, absorbency, softness, strength, weight, width, etc.
The pretreatment processes performed in conventional textile industry are sizing, desizing, scouring, bleaching, mercerization,
washing, and heat setting. One or more of any of these processes are required for the textile substrate depending upon the
end use of the textile.
Traditionally, the pretreatment process is performed on cotton, cellulose fibers, wool, and the blend of these fibers with
synthetics and semisynthetics. Natural fibers including cotton and wool have natural impurities, and the purpose of
pretreatment is primarily to remove undesired natural fiber content.
21. • Coloration process:-
Dyeing, printing, and coating are the coloration processes to produce beautiful motif
and color effect on textile. Printing and coating are limited to surface coloration and
may be applied to most of the fiber types, natural fabrics, and synthetics.
Approximately 10,000 different dyes and pigments are used industrially around the
world
Dyeing is the coloring effect throughout the cross section of fiber, and this effect can
be produced on any form of textile substrate including fiber/yarn, fabric, garment,
and clothing articles. However, any dyestuff is suitable for a particular type of fiber for
dyeing.
Dyeing of textile substrate is performed using any of the dyestuff including reactive,
direct, sulfur, vat, pigment, acid, and disperse, depending upon the dye-fiber system
compatibility. The dyeing method used can be continuous, semi continuous, and
batching. Continuous dyeing technique is performed for large-scale production in the
industry.
22. • Special finishing process:-
Special finishing effects are required in textile fibers. The functional attributes of
textile fibers are limited. Textile products are required to exhibit a variety of
performance effects for end use. Crease recovery, flame retardant, water
repellent, antibacteria, antistatic, moth proofing, softening, and hand-builder are
the special finishing effects that can be produced in textile.
Conventionally, special finishing is performed following the coloration of textile;
however, innovation has shown the possibility of performing special finishing
prior the coloration and special finishing in combination with the coloration
process.
23. Environment and textile manufacturing:-
All the environmental spheres, such as air, water and soil, are seriously affected by
the textile manufacturing processes from fiber production to final fabric finishing.
Consequently, a number of initiatives are introduced in textile industry by the public
and private partnership to enhance the environment-friendly nature of textile
processing.
Chemical used in fiber manufacturing and processing of textiles, effluent discharge
from the textile dyeing, printing, and finishing, dust, short fibers, and lint released
from the yarn manufacturing, volatiles and toxic gases released, etc. are the
undesired effects to environment and human lives.
An estimation of the undesired effects to environment associated with the major
processing units of textile industry can be presented based on the amount of
consumption of chemicals, water and energy used. More the chemicals, water and
energy consumed in a textile process, higher is the possibility of undesired effects to
our planet and living species breathing and breeding in the environment
24. Role of textile in interior designer
Textiles are important in interior design because they can help set a tone or bring
elements together for a very finished appearance. Some textile designers
specialize in creating textiles for interiors. Interior designers have to be
knowledgeable about many facets of textiles, including trends, safety and
durability.
Textiles are fabric materials usually made by interlacing threads of natural fibers
like silk and cotton or synthetic fibers like nylon and rayon. Processes for making
textiles include knitting and weaving. Textiles can be made for specific purposes,
like upholstery for furniture or fabrics treated for use in outdoor environments.
Textiles are one of many elements interior designers use in planning the look of a
space.
