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Vacuum Forming Terms
– The dark particles that appear
in plastic film during thermoforming processes because of contamination.
– The characteristic of some plastics of losing their colors
when coming into contact with water or certain solvents. Also, this is
the undesirable movement of materials to the surface of plastic or into
an adjacent material.
– Thermoformed semi-rigid plastic shells, typically made
to conform to the shape of the product being packaged.
– A protrusion on a plastic part that adds strength, assists
with alignment in assembly and allows for fastenings.
– Portions of thermoformed plastic where vacuum and
heat produce an opening in weak or thin points.
– A change in the structure of a plastic material.
– The detachment of thermoformed parts, like blisters, from
one another for the next phase of the packaging procedure.
– The process of removing static electricity from
plastic so that less dust clings to it.
(http://www.diecutting.net)
– The use of a steel rule die to cut finished sheets of blisters
or blister cards to create individual pieces.
– The degree to which the sidewall of a blister or
clamshell is tapered to smooth the progress of the removal from the thermoforming
mold and denesting of the blister.
– A technique that creates depressions in a specific
pattern on plastic film and sheeting.
– The tendency of thermoformed plastic
to crack under the influences of certain chemicals.
– A blister
card that is scored and die cut, permitting entrapment of the blister
between the two halves of the card. This supplies a seal between two boards
or between a board and a blister flange, especially useful when blister
packaging heavy items.
– The process of joining two or more plastics together
with the application of heat and pressure.
– The result of inadequate contact of the plastic material
with the surface of the mold due to trapped air, moisture on the surface
of the mold or low pressure in irregular indentations on the material’s
surface.
– A model of an intended
part. Prototypes show the final size as well as the design.
– Thermoplastic material derived from industrial
plastic scrap from a different processor.
– The flow of heated plastic
sheeting in a thermoforming procedure in which molten plastic sheets sag
before forming. The distance of the sag is determined by an electric eye
and is good for determining the forming readiness of the material.
– A heating procedure before forming a thermoplastic
sheet that involves heating both sides.
– Any plastic material,
which is not part of the product, that results from a molding procedure.
This material is typically tip scrap and can be reused.
– The construction required to create plastic sheeting,
comprised of an extruder, die, polish rolls, conveyor, draw rolls, cutter
and a stacker.
– The minute change in length or volume of a
material when subjected to heat.
– A double blister for encapsulating a product
for product visibility on two sides.
– An indentation or protrusion that hinders the removal
from a mold.
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