5.2 Flashcards
what factors consdiered when choosing timber
aetshteics
physical proeprites
sutiability for location
ease of machine
cost
avalability
constency in quality
waste?
timber aestehtcis
grain
pattern
colour
finsih
touch]
what are soft woods
timber from broad leaf trees
slow growing
deciduous trees
what are soft woods
timber from confieruosu trees
fast growing
examples of hard woods
oak
teak
beacch
eg of softwood
pine
spruce
doglas fir
preoprties of oak
hard
tough
attarctive grain
weatjer resitance
what does oak contain that can cdammage steel fixing or screws and shit
tannic acid
uses of oak
furntiture
flooirng
cladding
inetrior exterior joinery
proeprties and characteristics of teak
hard
tough
streight grain
natural oils
what do teaks natrual oils resit
moisture
acids
alkalis
uses of teak
aoutdoor furntiture
benches
deck boats
proeprties and characteristics of beech
hard
tough
close grain
avalabile in steamed and unsteamed
meanign fo stemaed and unsteamed beech
steamed = white colour
unsteamed = pink tinge
uses of beech
chairs
chopping boards
tools, eg mallets
kitchen ware
turned bowls
proeprties and characteristics of pine
straigh grain
knotty
can contain resinous knots
what is pine also knwon as
European red wood
uses of pine
indoor furntiture
proeprties and characteristics of spruce
straight grain
restiant to splitting
uses of spruce
indoor furntiture
proeprties and characteristics of douglas fir
straight/slight wavy grain
few knows
stable
good corrosion resistance
uses of fir
veneers
plywood
joinery
construction work
types of manfuactured boards
laminated baoards
compressed baords
what are laminated boards
layers glued together in a well organsied structrue with a syntehtci resin that sets rapidly udner heat and pressure
what are compressed baords
made from chips strands and particles of timebr glued udner comrpessive forces
why is manufactrued baords better than natrual timebrs
available in large sheets
dimensionally stable
constsen proeties
pre finsihed
envriomental ebenfit
enviro benefits fo manufactured boards
made from low grade timbers
utilise wastage fromother manfuacture
examples of laminated board
ply wood
flexible ply wood
hwo si ply wood made
thin layers of wood placed adn glued 90 degrees to eachother and comrpessed
proeprties of ply wood
good strength in all directions
no grain weakenss
does ply wood have even laeyrs
no always odd
what si MDF
compressed wood fibres
what sometiems is used as an additional resin for mdf
urea formalhydge
proeprties and characteristics of mdf
2 smooth faces
avalible in either standard grade or veneered with layer of timebr
uses of ply wood
structural work
desk tops
indoor furtniture
floor baords
uses of flexible plywood
laminaetd board
curved panels
uses of mdf
model or mould mking
furntiture
furntiture that may be made of mdf
book cases
cabinets
desks
hwo is block baord made
layers of strips of laminated timebr whcich run perpendicular to the baords surfaces
uses of block baord
indoor furntiture
shelvign
tabel tops
what is chip board
chisp of timber comrpessed to board form
proeprties fo chip baord
weak structure
poor aethtcis
why does chip baord haev a weak structure
chipped, non compact struct
is chip baord usually veneered
yes
uses of chip board
flat pack furntiure
where veneeer used on top
kicthen cupboards or work tops
types of metals
ferrous - contain iron
non ferrous - contain no iron
eg of non ferrous
aluminium
copper
eg of ferrous
mild steel
stainless steel
cast iron
proeprties and characteristics of aluminum
light weight
ductile
malleable
corrisve resitant
conductive
weldign processes that can be used on aluminium
MIG AND TIG
meltign temp of aluminum
660
uses of aluminum
drink cans
aricraft bodies
bike frams
sauce pans
cookign utensils
packagign
foil
proeprties and characteristics of copper
ductile
malleable
tough
corrision resitsant
condcuive
can copper be welded
no btu it can be sodlered adn brazed
meltign temp of copper
1083
uses of copper
electrical wires
pricnted circuits
wtaer pipes
hotwater tanks
central ehatign pipes
proeprties and characteristics of mild steel
ductile
high tensile strenght
tough
malleable
is midl steel poor corrsisve reist
yes
eltign temp of midl steel
1427
uses of midl stee
nut
bolt
washers
screws
car bodies
out panels fo white good
proeprties and characteristics of staineless steels
tough
ahrd
corrsive resiatnt
meltign temp of SS
1510
uses of SS
sinks
kitchen ware
cutler y
proeprties and characteristics of cast iron
hard outer skin
brittle core
good udner compression
meltign temp fo cast iron
1149
uses fo cast iron
disc brakes
machien parts
engine blocks
what si a metal alloy
two or more metals or other elements
exampels of metal alloys
bronze
brass
tungsten
proeprties and characteristics of bronze
tough
corrsion rest
can eb cast
compositition fo bronze
90% copper
10% tin
meltign temp of bronze
850 - 1000
proeprties and characteristics of brass
corrsive reistant
conduive
low meltign point
cast well
meling poitn fo brass
930
uses of rbass
boat fittings
door furntire
cast valves
taps
ornaments
proeprties and characteristics of tungsetn
very tough
very dense
reistant to corrosion
high tensile strenght
meltign poitn fo tungsten
3422
uses of tugngset
high speed cuttign tools
tips for circular blades
masonary dirll btis
what are the types of palstic
thermo polymers
pthermo settign polyemrs
what are thermo polyers
polymers set with ehat btu can be reused
what are thermo settign polymerns
polymers set with heat adn stay ins oldi staet ocne harded
Types of poletehelen
LDPE
HDPE
proeprties and characteristics of ldpe
tough
chem ristance
weatehr proof
can eb transluscent
lwo rigigdty
safe workign temp of ldpe
65
uses of LDPE
squeezy detergent bottles
toys
carrier bags
bin lines
geenral packagign
food wrap film
food trays
proeprties and characteristics of HDPE
availabel in transulcuent form
weatehr proof
tough
good chem resiatnce
safe workign temp of HDPE
65
uses of HDPE
chemical drum
jerry drums
toys
kitchen ware
logn lfie carrier bags
buckest
proeprties and characteristics of polypropelene
available in translucent form
godo chem resitant
tough
good fatuige retsaitn
what does tough fatigeu restant mean
hinge proeprty
safe workign temp of pp
100
uses of pp
rope
fodlers
folio cases
cotnainers
medical equp
proeprties and characteristics of HIPS
Hard
rigid
avalble in translucent
tough
safe workign temp of HIPS
70
uses of hips
yoghurt pots
fridge linings
single use cops
oilet setas
control knobs
proeprties and characteristics of abs
tough
hard
avalble in opaque
safe workign temp fo ABS
80
uses fo ABS
phone hadnsets
rigid luggage
food mixers
handles
hoovers
bumpers
remote casigns
proeprties and characteristics of PET
hard
transulcuent
good impact reissant
safe workign tmep of PET
65
uses of PET
water bottles
fizzy drink bottles
milk bbottles
chcolaet bo lienrs
types of polyvinyl chloride
palstciised
unpalstsiced
proeprties and characteristics of uPVC
rigid
opaque
tough
hard
weatehr reist
chem reist
safe workign temp of UPVC
95
uses of UPVC
window frames
external doros
gutterign
water srvcie pipes
bank cards
proeprties and characteristics of pvc
flxible
tranlsucent
tough
godo wetaher resit
chem reisst
safe working temp of pvc
95
uses of pvc
hose pipes
cabel isnualtion
medical rgade tubing
inflatble products
seat coevrigns
thermo settign polyemrs eg
urea formalhydge
polyester resin
epozy resin
proeprties and characteristics of UF
hard
heat reistant
good chemcial isnualtor
britlle
safe workign temp of UF
80
uses fo UF
adhesives
electrical fittings
proeprties and characteristics of polyester resin
rigid
heat resiatnt
chemcial resitant
britttle
safe workign temp fo Polyester resin
95
uses of polyester resin
casings
ay up process for GRP
car parts
chair setas
proeprties and characteristics of epoxy resin
rigid
tough
clear
hard
chem reistant
safe workign temp of epoxy resin
tough
hard
chemcial reist
rigid
clear
uses of epoxy resin
adhesives
surface coatigns
aerospace applications
eg of fibres
cotton
wool
silk
polyester
nylon
speak abotu wool
absorbant
strong
poor elastcitiy
tendency to crease
speak abotu wool
good insualtor
water repelent
nto very durable
speak abotu silk
good tensiel strength
druabel
light
hard to care for
speak abotu polyester
versatile
strong
good thermopalstic qualities
speak abotu nylon
strong
durable
good elastsicty nad tear reistance
exampels of fabrics
woven
non woven
kintted
blended textiels
what are woven fabrics
itnerwinign yarns with wafs and wefts
what are non woven fabrics
fabrics created from firbes bunches togehter
pro of non woven
cheap
con of non woven
lack strength
speak ab knitted fabrics
interlcokign loops of yarn
good fludiity
elastsictc
stretchy
speak abotu blended textiles
created from diff types of fibre to combien best preties of both
what are compsoite maetrials
materiasl made fo two or more diff maetrials
eg of compsoite maetriasl
grp
cfrp
how are both grp adn cfro made
firbes mized with themrosettign polyesetr resin
proeprties and characteristics of CFRP
lightweight
corrsive resitatn
tough
hard
good comrpessive strength
lwo thermal expansion
uses of cfrp
sports equipment
biek frames
tennis racquets
fishign rods
card bdoies
hepmets
prosethetcis
proeprties and characteristics of grp
lightweight
corrsive reistant
tough
hard
low thermal expansion
good comp strength
uses of grp
boat hulls
pond lienrs
kayak shells
sport car bodeis adn parts
what are mdoern maetriasl
materiasl developed through the invention fo new or improevd processes
are mdoern maetrials natrually occurign
NEIN
what are etexttiles
condcitve firbes directly into textile to produce clothign etc
uses of etextiles
smart colour displaus
heatign elenets
can sue kinetci enegry for heat
fabric key pads
garmenets to track health
what are super alloys
alloys with significntly enhacned characteristics such as mechanical strenght
high temp profrmace
corrsiona dn war restiant
use of super alloys
turbine baldes
rocket engines
chemical processing
what is graphene
worlds thinnest material
strongest material
harder than diamon
extemely light weight
conducitv
transpartet
elastic
how is grapheen made
carbon atoms arrange in a hexagonal latice
uses of grapehen
ink absed security tags
tennis rackets
skis
helmets
fodlabel phones
what are bioplastics
plastics made form plant based sources
exmapel fo plant based sources for bioplastics
veg oil
corn starch
uses of bioplastics
disposabel items such as pakcagign
cutlery
straws
bags
trays
egg cartons
mobiel phoen cassigns
caper firbe
s
what are nano materials
materials made by aletrign individaul atoms
what does aletrign idnviduas atoms do
reuslts in greater surface area
imrpoved strength to weight
elatssicty
codncutive
optical perfomance