Rotational grade

Rotational Molding

Rotational Molding (or Rotomolding) is a unique, low-stress method for manufacturing large, seamless hollow parts.

Function: Polymer powder (usually LLDPE) is placed inside a mold. The mold is heated while rotating slowly around two axes. The powder adheres to the walls and melts. The mold is then slowly cooled to minimize internal stresses.

Primary Advantage: Produces large, one-piece parts without seams and with relatively uniform wall thickness (even in corners).

Products: Water storage tanks, kayaks, large industrial bins, and playground components.

GRADE	MFI	Density		Application	Datasheet
HD-3840UA	4 (190°C / 2.16kg)	0.954		Scpetic tanks - Potable water tanks - Large agricultural tanks - Toys - Wide variety consumer articles - Canoes and Boats
HD-3030UA	3 (190°C / 2.16kg)	0.93		Small Containers(Max 500Lit) - Septic Tanks(max 500Lit) - Toy - Pleasure boats - Traffic warning signs

Key
Materials and Applications in Film Casting

The
choice of polymer raw material is crucial for determining the
final film properties and is heavily influenced by the desired application:

1.
Polyethylene (PE) Grades

LLDPE (Linear
Low-Density Polyethylene): Widely used for high-clarity cast film
applications due to its superior toughness and puncture resistance. It is
the core material for high-performance stretch film.
LDPE (Low-Density
Polyethylene): Used for seal layers in laminates where easy heat-sealing and low
cost are prioritized.
HDPE (High-Density
Polyethylene): Less common for thin films but used for stiffer, stronger cast
sheets and liners requiring chemical resistance.

2.
Polypropylene (PP) and Other Polymers

Cast Polypropylene
(CPP): Highly popular
for flexible food packaging, textiles, and medical packaging due to its
high heat resistance and excellent barrier properties.
PET (Polyethylene
Terephthalate): Cast into high-strength, thin films for electrical insulation,
optical displays, and specialty barrier layers.

Critical
Applications

The
high-quality output of the film casting process
supports demanding markets:

Flexible Packaging: Retort pouches, stand-up
pouches, snack food bags (often as a substrate for printing or
lamination).
Hygiene and Medical: Non-woven laminates, breathable
barrier films for surgical drapes and wound care.
Technical Films: Release liners, protective films
for electronic displays, and specialized barrier films for solar panels
(photovoltaics).