Heat
shrink films for packaging are films belonging to a class of plastics
known as thermoplastic. They soften and melt when heated. The long
polymer molecules in heat shrink films are in a tangled up
configuration. When the film is made, it is stretched while hot, which
lengthens the molecules. They stay frozen when the film is cooled.
Again, when enough heat is applied, they freely move and go back to the
tangled state, and thus get shorter, shrinking the film.
Shrink-wrapping is a simple, attractive and inexpensive packaging
solution. It displays and protects the product, is clean and tamper
evident. Shrink-wrapping is an investment in the appearance and appeal
of any product.
They are tough, durable and highly versatile. Impact is perfect for a
wide range of applications. They offer superior clarity, gloss, and
sheen and are puncture resistant. They are capable of using a wide range
of materials.
Materials Used For Making Films
Polyvinyl Chloride
PVC is a rigid and a versatile polymer and for several of its
applications must be compounded with plasticizing agents. The most
commonly used plasticizer is di (2-ethylhexyl) adipate. PVC films have
excellent thermo-formability, good chemical resistance and optimized
protection and because of this they are a world standard in
pharmaceutical packaging. They have been a major contributor to food
safety, both protecting and preserving food.
Polyolefin
Polyolefin films are the workhorses of the packaging and agricultural
industries. Their good mechanical and durability properties as well as
their excellent cost and performance ratio drive their omnipresence.
Polypropylene
Polypropylene is one of the most versatile polymers that serve both as
a plastic and as a fiber the most important property of polypropylene is
its versatility. Polypropylene films for packing are produced using the
latest technology and are particularly clear and glossy. They have high
mechanical properties, attractive appearance, and can store products for
a prolonged period of time. These are heat sealable films for flexible
packing and have high tensile strength.
Polyester
Polyesters are made from chemical substances found mainly in petroleum
and are manufactured in fibers, films, and plastics. The excellent
combination of optical, physical, mechanical, thermal and chemical
properties of the polyester films is driving the growth of the specialty
films market. Superior dielectric properties make it the preferred film
for use in larger capacitors and also support its use in wire and cable
insulation and electric assembly.
Applications: Heat shrink films and packaging
Typical applications include terminating, environmental protection,
corrosion protection, moisture sealing, mechanical protection, splicing,
color-coding, and strain relief. Leading beverage, dairy,
pharmaceutical, food, cosmetic and chemical manufacturers uses these
films.
It is used for outer packaging of a number of products including cooked
foods, books, magazines, stationery, office supplies, soaps, aerosol
cans, detergent bars, video tapes, CD, DVD, phones, calculators, etc.
Also used for covering electrical connectors. Ideal for multiple
packaging of vitamins, medicines, puddings, jellies, juice, fats food,
pastries and sweets. These films are ideal to make packaging pouches,
bags, food packaging laminates, dairy packaging, cosmetic packaging
materials etc.
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