Blister Packs –
It is commonly used as unit-dose packaging for pharmaceutical tablets,
capsules or gels. Blister packs can provide barrier protection for shelf
life requirements, and a degree of tamper resistance. Blister packs are
created by means of a form-fill-seal process at the pharmaceutical
company or contract packer. Blister packs consist of two principal
components : 1) a formed base web creating the cavity inside which the
product fits and 2) the lidding foil for dispensing the product out of
the pack. There are two types of forming the cavity into a base web
sheet: thermoforming and cold forming.
Biaxially Oriented Polypropylene (BOPP) –
Orientation of plastic films in both machine and cross machine
directions by stretching. Properties of biaxially stretched films are
generally well balanced in both directions.
Extrusion Lamination –
A laminating process in which individual layers of multi-layer
packaging materials are laminated to each other by extruding a thin
layer of molten synthetic resin (such as polyethylene) between the
A printing process using a raised surface on a flexible plate, often
made of a rubber-like material, mounted on a rotary letterpress.
Flexographic inks are very thin, watery inks that dry very quickly. The
flexible plate makes it possible to print on irregular surfaces such as
aluminum cans, coffee mugs, or corrugated cardboard
High Density Polyethylene (HDPE) –
A plastic material whose thickness ranges from .941 -.965 g/cm3. HDPE
is more expensive to process, but maintains greater strength, resistance
and stiffness than either LDPE or LLDPE.
Laminating Film –
Most thermal laminating film consists of two layers: a base layer of
polyester and an adhesive layer of polyethylene. The polyester layer
forms the harder outer surface of the film and does not melt at
laminating temperature. It provides rigidity and protection for your
laminated items. The greater the polyester content, the higher the level
of protection, rigidity and luster. The polyethylene layer melts at
laminating temperature and bonds the film onto the subject material
under the pressure of the laminating rollers.
Linear Low Density Polyethylene (LLDPE) –
A plastic material that is produced at lower temperatures and pressures
than LDPE through copolymerization, resulting in a crystalline
structure responsible for greater stiffness and a higher melting point
than LDPE. Although it is more difficult to process, LLDPE maintains
greater tensile strength and a greater resistance to stress cracking
the art or process of chemical-printing from a flat stone or metal
plate by a method based on the repulsion between grease and water. The
design is put on the stone surface with a greasy material, and then
water and printing ink are successively applied; the greasy parts, which
repel water, absorb the ink, but the wet parts do not.
Low Density Polyethylene (LDPE) –
The most common and least expensive plastic bag material that maintains
a density of .910-.925 g/cm3. LDPE maintains its durability,
flexibility, water resistance and clarity under low temperatures, and
its low melting point makes it ideal for heat sealing.
Metalized OPP film. It has all the good properties of OPP film, plus
much improved oxygen and water vapor barrier properties, (but not as
good as MET-PET).
Metalized PET film. It has all the good properties of PET film, plus
much improved oxygen and water vapor barrier properties. However, it is
Nylon (NY) –
Polyamide resins, with very high melting points, excellent clarity and
stiffness. Two types are used for films: nylon-6 and nylon-66. The
latter has much higher melt temperature, thus better temperature
resistance, but the former is easier to process, and it is cheaper. Both
have good oxygen and aroma barrier properties, but they are poor
barriers to water vapor.
Offset Lithography –
In Direct Lithography, an image in reverse is printed onto the paper
directly, creating a positive image. In Offset Lithography, a positive
image is transferred to a rubber-covered cylinder (reversing the image),
and then transferred to the paper leaving a positive image.
Oriented Polypropylene (OPP) –
A stiff, high clarity film, but not heat sealable. Usually combined
with other films, (such as LDPE) for heat sealed. Can be coated with
PVDC (polyvinylidene chloride), or metalized for much improved barrier