Acrylic
sheet
- Also known as Perspex, Plexiglas,etc.
- This product is crystal
clear and about half the weight of glass and seven times stronger. It
is relatively easy to drill and cut, and is a safe alternative to glass.
- Applications such as glazing,
boat windscreens, display, cubby house windows, light boxes, etc.
- It is UV stable and durable
for outdoor use. The life span of the material depends on the selection
of the brand of acrylic.
- Menzels plastics recommends
the Japanese manufactured Mitsubishi Rayon"Shinkolite-A" acrylic
for all applications demanding very high quality and durability, such
as external glazing, Art Gallery use, boat windscreens. We also sell
and recommend a quality commercial grade of acrylic for value for money
uses this is a brand that often use in our factory for fabrication jobs.
- Please note we do not sell
or recommend inferior, cheap, made to a price acrylic. This type of
material often has a shortened life span, may have styrene fillers and
high thickness's variation.
Polycarbonate Sheet
- Also referred to as "Lexan"
- This is a clear extremely
tough sheet. It is about half the weight of glass and approximately
250 times stronger. It is for practical purposes almost unbreakable.
- No problem drilling, cutting
or jig sawing. It can be supplied with the UV coating to ensure long
outdoor life spans.
- Its uses vary from machine
and lathe guards, safety glasses, site tubes, roofing, glazing, inspection
windows, police riot shields, bullet resistant glazing, banks and armoured
cars. It is also finding more use as an anti-vandal protection glazing
and advertising signs. Light boxes. Etc
- Menzel plastics sell a range
of high-quality Polycarbonate sheet, in various sizes, thicknesses and
tints. We supply brands such as GE lexan,gexl10, gemr10, laserlight
macrolon, Sheffield, Rhino, we also supply twinwall and multi wall Poly
carbonate such as,Polly Gal, Macrolon,dampalon,thermoclear.
Traded tips do's and don't's,
care and cleaning of acrylic sheet (Perspex).
- Acrylic is approximately
half the weight of glass and about seven to 10 times stronger but the
trade-off is that it is more easily scratched and hence greater care
is needed.
- It is about the same surface
hardness as aluminum and quality acrylic is among the most stable of
all plastics.
- To clean acrylic we recommend
warm soapy water and to keep it at its best use Vuplex plastic cleaner and polish.
- Chemical Resistance Of
Acrylic it is insolvent to inorganic chemicals and normal chained
hydrocarbons, but contact with organic solvent causes dissolvement,
swelling,hazing and cracking.
- Due to its greater thermal
expansion, allowance must be made when drilling or fitting into a recess.
It is about twice that of cedar, seven times that of iron, about five
times that of glass.
- Drilling Ordinary
drill bits can be used but we recommend drill bits at slower speeds
and having a backing sheet of scrap timber behind the acrylic to avoid
cracking. On important jobs practice on a piece of scrap or offcut acrylic.
- Cutting acrylic can
be cut, scraped, engraved and machined as well as routed. Care must
be taken to support the acrylic and prevent undue flexing and vibration.
Saws can be the triple chip fine tooth circular,fine tooth jigsaw or
band saw etc, if cut to fast, Chipping will occur, and too slow sticking
and melting.
- Fasteners we do not
recommend the use of pop rivets on acrylic as this will often crack
and burst the acrylic due to side expansion of the Rivet within the
hole. Drill the hole a little oversize to allow full thermal expansion
and fastening using screws and nuts, preferably with flat washers. If
vibration proof fastening is required we advise the use of nylock nuts.
- Polishing we can
create a high-quality polished edge using our Diamond machine polishing
equipment. If desired to do by hand it is a labour intensive method
of scraping or standing with wet and dry paper through various grades
from medium to very fine and final polishing with a fine abrasive polish.
Flame polishing can also achieve the same result but we do not recommend
this unless the operator has experience and some plastic and hand skills.
- Cementing solid cementing
creates a strong bond. We sell and recommend the use of Weldon16 in
a tube or Weldon 3 in a tin.
- Acrylic can be heated and
bent and moulded and can be supplied in either flat sheets, clear tubing,
extruded shapes and we have toughened acrylic hinges and off cut pieces.
The sheets also are available in tints and colors, prismatic diffuser
,and Opal for use in skylights, light boxes and advertising signs.
- Storage we recommend
the sheets,especially the paper masked, be stored out of the direct
sunlight and stored in a cool environment. It has a finite life span
and sheets that are a few years old can be very difficult to remove
the paper masking.
Trade tips do's and don'ts
and care and cleaning of Polycarbonate sheets (Lexan)
- Polycarbonate is
half the weight of glass and about 250 times stronger, but the trade-off
is that it is much more easily scratched and hence a greater care is
needed.
- To clean Polycarbonate we
recommend warm soapy water and to keep it at its best use Vuplex plastic polish
and cleaner.
- Due to its greater thermal
expansion allowance must be made when drilling or fitting into a recess
it is about twice that of cedar, seven times that of iron, about five
times that of glass.
- Drilling ordinary
drill bits can be used.
- Cutting easily cut
with most find medium saws, jigsaws, band saws, circular saws. Exercise
great care when using circular saws.
- Fasteners screws,
bolts, rivets can be used, but allow oversized hole for thermal expansion
Use nylock nuts if vibration proof fastening is required.
- Bonding and sealing
Polycarbonate is weakened and attacked by many common solvents and hence
great care is needed both in cleaning and selection of suitable glues
and adhesives. The only silicon we recommend is neutral cure ( roof
and gutter) do not use any silicon with an acetic cure (vinegar smell).
- Storage we recommend
the sheets, especially the paper masked, be stored out of the direct
sunlight and stored in a cool environment. It has a finite life span
and sheets that are a few years old can be very difficult to remove
the paper masking.
- Bending Poly carbonate
can be cold bent using sheet metal benders. It can also be bent and
shaped using heat but with care and experience.
- Poly carbonate is a tough
elastic clear material which has an inherent memory and can withstand
impact. It is thus very suitable for use as machine and lathe guards
and in anti-vandal applications. Examples safety face shields, glasses,
bank bullet resistant shields, police riot shields, roofing, sight glass
tubing, illuminated signs etc.
- Ultraviolet resistance
UV standard Polycarbonate, although very strong, is weakened and will
yellow with exposure to UV light. This grade of Poly carbonate is meant
for indoor use only and we refer to it as general-purpose poly-carb
GP. If the sheets are to be used outside we recommend the use of sheets
treated with a UV coating UV1 one side only UV2 both sides.
- Menzel quality it
is our firm company policy to supply only quality brand sheets and to
advise the customer of the best value for money to suit the application.
We will not sell inferior material or engage in passing off inferior
grades for more expensive ones.
- Thermal expansion
due to its approximately 5 times greater rate of expansion compared
to glass we recommend allowances be made both in the framing or screwing
down. The rate is about 2.1 mm at 3 m per 10°C.
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