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The
PC 100 series consists of a foil strip laminated to a
pressure sensitive tape or film of the customer requirements.
The foil is centrally positioned on the tape/film leaving
a creepage path on both edges of the foil. The PC 100 series
is ideal for applications where overall conductor and insulation
thickness must be minimized. The PC 100 series is also available
with non-adhesive edges. When using a pressure sensitive tape
which will have adhesive on the creepage margin, a release
line can be used for ease of handling when the material needs
to be cut to length for its shielding/conductor usage. The
PC 100 series also comes with a transfer adhesive, conductive
or non-conductive, for EMI/RFI shielding applications.
Applications
for PC 100 and PC 300 Series:
Capacitor shield
Transformer component outerwrap
Electrostatic shielding
Foil winding high frequency application
EMI shielding grounding static charge drainage
Electromagnetic shielding
Cable shielding
The
PC 300 series is a "Cuffed" shield or conductor, consisting
of a foil strip partially enclosed in a polyester adhesive
film. The insulation totally covers one side of the foil wrapping
around the foil edges, and partially enclosing the other side,
creating a cuff along each foil edge. The central portion
of the foil, on the partially enclosed side, remains exposed,
to facilitate the soldering and attachment of leads.
The
standard PC 500 series consists of a foil strip, sandwiched
between a 1 mil adhesive insulating film/tape and a 2 mil,
non-adhesive clear Mylar film. The design, includes a .062"
creepage path along each edge of the foil. The insulating
margin serves to bond the non-adhesive Mylar film to the adhesive
layer, creating the enclosed "sandwich" effect. The creepage
path is determined by the engineer needing to meet the necessary
industry standards. The PC 500 series is available in foil
gauges of .001" to .005" or double or triple foil combinations
making a total of .003" to .006" max. Also available in nonstandard
film thicknesses.
Applications
for PC 500
Electrostatic shield transformers/magnetic devices
Static drain charge component outerwrap
Toroidal primary/secondary shield
Underground cable locator
Mu-metal electromagnetic shield
Silicone steel magnetic shield
Toroidal safety shield in medical power supplies
The
PC 700 series is ideal in light or heavy duty shielding
and conductor applications. The advanced electrical and mechanical
characteristics associated with the PC 700 series, are a result
of the foil being completely enclosed in a 1 or 2 mil, non-adhesive,
clear Mylar envelope. The Mylar envelope is then sealed with
a 1 mil pressure sensitive tape running centrally along the
side with the Mylar seam. The result is a totally insulated
enclosure with special features/benefits.
- Maximum
protection in the event of a breakdown
- Foil
slides easily in or out of its enclosure to simplify soldering
and attached leads.
- Non-adhesive
insulation does not shrink during the bake cycles.
- Standard
design 1-2 mil has a dielectric strength of approx. 5000-8000
volts, and a temperature rating of 150ƒC.
- Air
space within the Mylar enclosure serves to increase the
insulation value, while also stabilizing temperature and
humidity within. Applications 700
- Foil
winding steroidal/conventional transformers
- Safety
shield Toro dial/conventional/inductors
- Primary
secondary shield
- Electrostatic
shield
- Totally
enclosed Mu-metal shield
The
PC 900 series is a multiple conductor consisting of two
or more copper conductors running parallel, equally spaced
on a backing film, with a predetermined creepage path on the
edges of the foil and between the conductors. A typical construction
of the PC 900 series is a 625" double faced polyester film
with a silicone release liner backing with two .002" x .200"
copper conductors leaving a creepage path of .075" on the
edges and between the conductors. This is then overlayed by
a .002" Mylar film creating a sandwich effect. This varies
according to the application and the industry standards that
have to be met by the engineer. With the PC 900 series it
is possible to have several copper conductors at various widths
and thicknessess within the same product.
Applications
for PC 900
- Foil
winding transformers
- Low
voltage wiring 12-24v
- Toroidal
- Inductors
- Speaker
cable
- Hobby
industry
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The
PC 100 "Foil Backed" series is noted for simplicity of
design, and ease of handling; yet is a highly effective shielding
or foil conductor design, ideal for the engineer seeking an
economical solution, suited to high volume applications.
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The
PC 300 "Cuffed" series is one of the most widely recognized
foil shielding designs at work in the transformer industry,
yet until recently it was hand fabricated, in house, at significant
cost. Our PC 300 series, offers engineers and managers an advanced
solution, in the effort to reduce costs, manage quality and
simplify production. |
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The
PC 500 "Sandwich" series unities precision engineering
and technology, easy handling characteristics, durability
and economy, in one compact design. The shielding solution
has created a special niche among toroidal transformer manufactures,
where it is used as a safety, grounding or electrostatic shield.
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The
PC 700 "Totally Enclosed" series is probably the most
rugged and advanced performed foil shielding and conductor design,
currently available in North America. Having found broad acceptance
in Europe's fast growing toroidal market, the PC 700 series
uniquely suited to applications seeking optimum electrical performance,
mechanical strength and reliability. |
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The
PC 900 series "Dual or Multiple Conductor" has found
a niche in every corner of the electronics market from transformers,
computer, speaker telecommunications, to the hobbyist miniature
industry. The PC 900 series is an ultra thin flat foil conductor
with removable release liner enabling the tapewire to adhere
to any surface, for carrying signals, or ac/dc current.
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The
PC 1100 series "Edged Cuffed" has insulation cuffed around
the edges of the foil only, leaving the center of the foil exposed
on both sides. Excellent for use as a grounding strap, and foil
winding. Technical data and specifications are the same as listed
for the PC 300 series. |
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The
PC 1300 series "Margin Edged Cuffed" leaves an insulating
margin between the bobbin flanges and the foil edges. Similar
to the PC 300 series, the design allows the insulation to cover
the back of the foil cuffing around in foil leaving an insulation
path between the bobbin sides and the foil edges, the insulation
then cuffs over the foil leaving exposed foil on the top side
for lead termination. Excellent for high frequency transformer
applications. |
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TECHNICAL
ADVANTAGES
Adhesive Systems RT (Thermosetting Rubber) Thermosetting
adhesives have good initial adhesion and electrical putty.
When subjected to the recommended thermosetting cycle, a rubber-resin
adhesive system will cross-link into a three-dimensional matrix
molecular form providing greater adhesion and bonding, higher
solvent resistance and higher heat resistance. This system
requires the addition of a tackifier; fillers are also used
to add internal strength and yield specific properties. In
order to achieve solvent resistance, the following cure cycles
are recommended. Thermosetting Time/Temperatures for Rubber-Resin
Adhesives.
- 3 hours
at 120°C (250°F)
- 2 hours
at 135°C (275°F)
- 1 hour
at 150°C (300°F)
ST
(Silicone)
Silicone adhesive systems are compounded in a manner similar
to that used for rubber-resin systems. However, the thermosetting
reaction required considerably higher temperatures. Proper
compounding of the silicone adhesive is very important to
provide a system with a good balance of internal strength
and adhesion. The advantages of a silicone adhesive system
are many. It has exceptional heat resistance. It is inorganic
and, if burned, leaves a nonconductive residue. It may be
applied at very low temperatures. Thermosetting Time/Temperatures
for Silicone Adhesives:
- 3 hours
at 260°C (500°F)
- For
maximum solvent resistance, cure for 24 hours at 260°C
(500°F)
A (Acrylic)
Acrylic adhesives are synthetic polymers which have been
specifically formulated to meet the individual needs of the
applications for which the tapes were designed. Acrylic adhesives
are compounded for good resistance to heat, oxidation, solvents
and oils. RN (Nonthermosetting Rubber) An adhesive system
is classified as nonthermosetting if it does not advance in
cure upon application of heat.
BACKINGS
Polyester
Film
These tapes are specified for insulation applications
requiring a thin, physically durable and high dielectric strength
tape that can withstand higher temperature conditions than
tapes with acetate film backing. Polyester film tapes are
conformable, exhibit excellent chemical, solvent and moisture
resistance and resist cut-through and abrasion. 130°C
Polyimide
Film
Tapes with polyimide backing can be used in applications,
such as coils, harnesses and capacitors, that undergo extreme
temperature variations. Under such conditions, these tapes'
physical and electrical properties remain stable. Thermosetting
silicone pressure-sensitive adhesives complement the stability
of polyimide tapes. 180°C
Epoxy
Film
Epoxy film tapes offer solder and puncture resistance,
thinness, high dielectric, strength, conformability and UL
recognition for temperatures up to 150°C and flame retardancy.
The versatility of this construction offers cost-saving opportunities
through tape inventory consolidation.
155°C
Type 410
Type 410 is an original form of Nomex paper, and is widely
used in a majority of electrical applications. It is produced
in 11 thicknessess (2 to 30 mils, or 0.05 to 0.76 mm) with
specific gravities from 0.7 to 1.2 A calendered product, it
has high inherent dielectric strength, mechanical toughness,
flexibility and resilience. Type 410 is used in almost every
known sheet application. Temperatures up to 200° (390°F)
have little or no effect on the electrical and mechanical
properties of Nomex products, and useful values are retained
at considerably higher temperatures. Furthermore, these useful
properties are maintained for at least 10 years of continuous
exposure at 220°C (430°F).
Quality
Superior Electrical Performance - Foil wound coils are superior
to wire in many applications. Foil shields are more reliable
than equivalent wire shields.
Economical - Costly, in-house fabrication is avoided, resulting
in major savings in labor and handling time.
Ease and Speed of Application - Preformed shielding is applied
in one quick, easy operation.
Reduction in Reject Rates - Shields have a proven record
of performance and excellence.
Simplified Budget and Inventory Control - One stop purchasing
for your insulating and shielding needs.
Savings in Lead Time - Performed shielding and conductors
are ready to use off the shelf, giving greater production
flexibility.
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