Page 53 - Plastics Engineering

36 General Properties of Plastics

Cellophane CA
-
PC
-

-

tl 1 1 1 I

Oxygen permeability (cc-25 pm/m2-24 h-atm)
Fig. 1.13 Permeability data for a range of plastics

Nylon
u)
v 2)
.- 3 loo-
- EVOH
a
m
E
ZY
P
L 10-
a
0
a
9
tl
c
1 10 100 lo00 10000 1OOOOO
C02 permeability (cc-25 pdm2-24 h-atm)
Fig. 1.14 Permeability data for a range of plastics

plastics are unique in design terms in that they offer a wider choice of conver-
sion techniques than are available for any other material. A simple container
for example could be made by injection moulding, blow moulding or rotational
moulding; light fittings could be thermoformed or injection moulded. In this
brief introduction to designing with plastics it is not possible to do justice to the