Textiles
- Created by: Eleanor200101
- Created on: 10-02-17 14:32
Fibre Types
Natural fibre-animal -wool /silk/ alpaca /cashmere
plant-cotton /linen /jute /hemp
Sythetic fibres-elastomeric/acrylic/pvc/polyester/nylon/tactel
Regenerated Fibres-viscose/lyocell/acetate/modal/tencel
Woven Fabrics
Interlcok threads or yarns
weft:runs horizontally
warp:runs vertically
Fray easily
strongest along the grain
lack elasticity
stronger and firmer the closer the weave is
Knitted Fabrics
Made from Yarn in a series of interlocking loops
They are:
elastic
warm
can be napped or brushed
making them fluffy
Plain weave
Constrcution-over one under one
Selvedge- doesnt fray
Bias-diagonally across the weave so fabric stretches
Lots of variation/strong/hardwearing/used for fashion and furnishings fabrics
Twill weave
Construction-over 2 under 2 weft moves over 1 warp thread each time
Pattern-forms a diagonal patern
Strong/Drapes well/used on jeans and uniforms and jackets
Satin Weave
Construction-warp over 1 under 3 weft over 3 under 1
weft thread-lies on the surface
Weakest of all weaves/shiny/snags easily/drapes well/used to produce polyester satin
Weft knitted
Construction-horizontal rows interlocking loops /ladders
Made by hand or machine
Stretch and comfortable
Used for socks and jumpers/t-shirts
Warp knitted
Construction-Vertical colums interlocking loops doesnt ladder
Made by machine only
Less elastic and firmer
Used for swimwear and underwear and geotextiles
Non woven Fabrics
Wool felts:
fibres are matted together made from animal hair or wool
Fibre web is squashed together with moisture a machine and heat
Fibres become tangled
used for hats and jackets/slippers
Bonded fabrics :
Fibres are bonded together using adhesive solvent of lines of stitching
Used for disposable fabrics such as medicalmasks and table linen
used for interfacting and stiffening
Non woven Fabrics
Needle felts:
fibres are tangled and interlocked
fibres are passed through lots of barbed needles
Laminated Fabrics:
fabrics are bonded together for extra properties
Gore tex and Sympatex
Fabrics can be made waterproof and breathable
Non woven fabrics summed up
Made from raw fibres using chemicals to mat fibres togetherand heat to bond the fibres together
Then stitching the fibres together in layers
They dont have a grain dont stretch or fray easily not as strong as knitter or woven and are permeable
They can be moulded made from recycled fibres cheap and weaker when wet easily pull
Smart Materials
Smart materials can respond to external stimuli or activated by internal or external power sources
Gore Tex:
-Laminated membrane
-breathable
-lightweight
-waterproof
-used on jackets and shoes
micro encapsulated
scents and smells are released slowly
childrens toys
moistured tights
antebacterial socks
Thermochromic fabrics
-Dyes that change colour in response to tempreture
-used for novelty products and medical uses eg wound dressings to indicate infection
Memory textiles
shape memory polymer
tempreture sensetive foam used to mould and match the body pressuring against it
used for elderly and disabled
could be used for medicine and keyhole surgery
Body enhancing Fabrics
Create a sence of well being
medicine plaster with painkillers
anti stress or calm including properties
Electro textiles
Textiles can be combined with electronics to create products with soft keyboards to provide additional functions
wearable textiles
soft washable fabric with optical/electrical fibres
could be used for shirts with parental use on babys and for military use
uv reactive Fabric
Dyes can respond to light/sunlight and can produce interesting patterns
used for novelty products
can measure sun exposure/military clothing that adjusts according to the environment
phosphorescent Fabric
Transform invisble forms of energy into visible light
dyes can be impregnated
dye can be a surface coating printed on pattern or woven or spun
used for childrens novelty clothing clubbing wear and high visibility for safety purposes
Combining Fibres and Fabrics
Interfacing: Fabrics such as vilene-can be stitched or laminated to other fabrics.which reinforces stiffens and gives strength to collars cuffs to prevent fabric from stretching or sagging
Quilted:Two or more layers sewn together to give an attractive appearance and added warmth
Gore tex:can be laminated toanother fabric using adhesive and heat
used for all weather clothing such as shoes and jackets because its breathable and waterproof
Kevlar:a high strength lightweight and flexible fibre used for bicycle tyres racing sails and bullet proof vests because of its high strength to weight ratio
Thinsulate:a highly insulating but thin fabric
microfibres in thinsulate are fine and capture more air in less space making it a better insulator
it traps air between the wearer and the outside
can be machine washed and dry cleaned is breathable as well as moisture resistant
Two ways of mixing Fibres
Blending:
when fibres are mixed together at the spinning or spineret stage meaning that different fibres are disturbed throughout the fabric
includes polyester and cotton
Mixing:
two different yarns are used during the weaving process one for the warp and one for the weft
Includes nylon and wool /and/ acrylic and wool
Advantages of mixing Fibres
-improves fabric performance
-reduces cost
-different textures can be achieved
-interesting solour effects easily achieves due to different absorbancies
Natural Fibres
Linen-Cellulouse fibre
Cotton-cellulouse
Silk-natural filament fibre
Wool-any type of animal hair
Linen
Properties:
-very absorbent
-dyes well
-dries quicker than cotton
-cool to wear
Disadvantages:
creases easily
stiffer than cotton less subtle
more expensive than cotton
Cotton
properties:
-strong when wet
-dyes easily
-easy to launder
-cool to wear
Disadvantages:
creases easily
takes a long time to dry
stains are absorbed
Wool
properties:
-warmest natural fibre
-heat and moisture can mould the fibres
-water reppelent
Disadvantages:
hairy surface
shrinks when washed harshly
Silk
properties:
-very smooth
-dyes well
-doesnt crease easily
-strongest natural fibre
Disadvantages:
expensive
needs to be laundered carefully
Synthetic fibres
Nylon
polyester
polar fleece
acrylic
Nylon
properties:
strong and elastic
dries quickly
keeps its shape
easy to launder
disadvantages:
collects static electricity
feels cold to touch
damaged by high tempretures
uses:shorts/swimwear/bedspreads
Polyester
Properties:
resists wrinkling
easy to launder
dries quickly
strong and hardwearing
disadvantages:can be damaged by heat
feels cold to touch
doesnt absorb moisture
uses:clothing
sports clothing
Acrylic
properties:
soft and warm
dries quickly
lightweight
dyes well
disadvantages:
easily damaged by heat
not as absorbent as wool
uses: knitwear/blankets/toys
Polar fleece
advantages:
soft and comfortable to wear
warm but light
dries quikly
warm even when wet
disadvantages:
flammable
not windproof
can be damaged by high tempretures
Microfibres and smart materials!!!!!!
Microfibres-polyester/nylon microfibres are 60-100 times thinner than human hair
they can be blended with sythetic and natural fibres
used for clothing for outdoor purposes
Themo plastic =They can be heat treated to give them coils/crimps and loopswhich creates textured yarns stretchy and warm
used for underwear and sportswear
Smart material:material that can respond to either external stimuli or activated by internal or external power sources
they can be incoporated by embroidery or printing them on
Nano fibres and technical textiles
Nano fibres=tiny molecules added to fibres to improve the molecular level
they can be used to make fabrics repel water stain resistant non creased when washed
Technical Textiles:
Mnufactured for functionality and technical performance the visual appearance is less important
used in industries such as :medicine and transport/geo textiles
Labelling
Contains:
Fibre content
country of origin
safety advice
care instructions(how to wash)
safety advice(keep away from fire)
extras may include:
retailers logo
a barcode
ethical information eg organic
Care labels !!!!!
Dying
Hand dyeing:
factories emersed in hot and cold dyes in a dye bath
the dye bath is agitated so the dye reaches all areas
when desired colour is achieved the fabric is removed and raised to remove excess dye
Then foxed with a mordant or a fixing agent such as salt
The strength of colour of the dye is determined by:
-time in dye bath
-absorbency of fibres
-original fabric colour
commercial dyeing
Continous dyeing:
The fabric is passed through a dye bath
squeezed between rollers
used for colours that dont require too much of a change quickly with fashion
Batch dyeing:
Fbrics produced without dye
dyed to order in large batches
used for fabrics that have changing colour frequently because of fashion
Rotary screen printing
Uses CAD
roller squeezes one for each colour
very fast used in continuous printing of furnishing and clothing fabrics
Screen printing
A pattern is printed onto a fabric
through a stencil
placed by a screen
each screen prints part of design in one colour
the printing must be fixed by using steam or dry heat
Block printing
Done by using a metal or wooden block
one for each colour
background shapes cut away to leave a raised design on the block cut in relief
dye is applied and stamped onto fabric
slow process by using specialised craft industries
Industrial flat bed printing
Automates the screen printing process
with fabric moved through the machine on a conveyor belt and printed repeatedly rapidly
components
covered buttons
studs
ribon
eyelets
lace
buckles
zips
dyes
thread
bindings
interfacing
Product analysis
Design specification=created from design brief after research
sets out essentialand desirable criteria
Product specification=identifies the materials and equipment neede to make the product in prototype stage
Manufacturing Specifications=
-made after product has undergone final modifications
provides materials and equipment lists
identifies all tasks that need to be completed in sequence to manufacture the product
Colour and design equipment
Batik:
-pots are heat resistant and used to melt wax
screen printing:
-applies patterns onto fabrics with a special mesh placed over the fabric and a squuege to push the pigments through the msh onto the fabric
one off or job production
A single textile product made to a clients specification
developed from a basic pattern to be altered by the clients needs
made by a small team or indivisuals from start to finish
highly skilled and use of versatile equiment
high cost of production
Batch production
Set quantities made to order
prototype is made
manufacturing costs generally low
for seaonal demands such as swimwear
flexible can easily be changed for new orders
Mass production
industrial scale of manufacturing were large quantities of products are on a production line
suitable for products not being redesigned eg jeans towels
not complicated and cost effective
Just in time production
Bought quickly shipped as soon as they are completed and supplied just beforethe the reatiler needs them increases profit but vital they arrive on time
less space required for storage
no money wasted on upholding stock
production line
the work flows in a straight line through work stations
any problems can result in the whole line stopping
cellular work
small group works on a range of skills where they can rotate their work
gives greater skill/higher quality
product changes are easy to do
CAD
COMPUTER AIDED DESIGN!!!!!
-Allows designs to be sompleted very quick almost instantly
-Advantages:
qucik to change colours of a design
quick to change the scale of the motif
reapeat pattern easy
designs can be saved and used agin
accuracy
designs can be sent to the connsumer for instant approval
CAD
Disadvantages:
sepecialist computer aided software is expensive
designers have to be trained to use the software
CAM
COMPUTER AIDED MANUFACTURE!!!!!
Reduces the time required to make the textile product
decreases cost of manufacture not as many workers therfore not as many wages
reduces repetitive work
less waste no mistakes decrease the cost
accurate
Disadvantages:
very expensive to buy machinery
workers have to be traines to programm the machine
if machine breaks will need specialist repair service can take a long time
processes carried out by CAM
spread and cutting out of fabric
cuts many layers at one time
embroider machine embroiders many at once improves productivity
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