PP Grades

Polypropylene is one of the most versatile materials available today. HMC Polymers’ PP resins are the basic building blocks used by our customers to make countless everyday products that have a positive effect on people's lives.

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A Superior Product Portfolio

HMC Polymers' polypropylene resins are used by our customers to manufacture a diverse array of goods including consumer products, fresh food packaging, high-strength construction materials, automotive and electrical components, durable textiles, medical applications, pipe systems and many others.

Applications for PP resins continue to grow every day replacing traditional materials such as glass, wood and metal -- and other polymers.

Primary Advantages of Polypropylene
  • Low density (0.9 g/cm3)
  • Good sound-deadening properties
  • Excellent reproduction of mould surface
  • Versatile (processed in many ways)
  • Easily coloured
  • Easily modified
  • Good water vapour barrier
  • Excellent chemical resistance
  • Capable of being recycled

Polypropylene is a downstream petrochemical product derived from the olefin monomer, propylene. The polymer is produced through a process of monomer connection called addition polymerization, normally by using the Ziegler-Natta catalyst system.

Polypropylene properties can be tailored including process conditions, copolymer components and contents, molecular weight and molecular weight distribution.

Polypropylene Properties
Isotactic polypropylene is well suited for a variety of end uses, ranging from flexible and rigid packaging to fibres and large moulded parts for automotive and consumer products.

Polypropylene is recyclable, an important consideration in many packaging and automotive applications, and it can be incinerated for energy recovery.

It can be processed using most methods including cast, blown and BOPP film extrusion, extrusion coating, blow moulding and injection stretch blow moulding, injection moulding and thermoforming. Its physical properties can be easily enhanced by using functional additives.

Polypropylene has excellent chemical resistance and electrical insulating properties.

Homopolymers (HOMO)
Homopolymers are characterized by a high isotactic index, resulting in a high melting point and leading to excellent stiffness, superior scratch resistance, and good chemical resistance against most inorganic acids, alkalis, and salts.

In addition, homopolymers provide strong resistance to environmental stress cracking when in contact with alcohols, esters, detergents or polar hydrocarbons.

The high melting point also makes HOMO PP resins especially suitable for applications requiring temperature resistance (e.g. hot filling or steam sterilization).

HOMO PP resins are available in a wide viscosity range and therefore can be used in all processing technologies ranging from pipe extrusion to thin wall injection moulding (TWIM).

High Crystalline Polypropylene (HcPP)
High crystalline polypropylene resins are characterized by an extremely high isotactic index. When compared to standard homopolymer resins, these resins exhibit a significantly higher stiffness and excellent chemical and heat resistance.

The increased stiffness versus standard polypropylene provides a significant down-gauging potential. High crystalline polypropylene can be converted with existing extrusion or injection moulding equipment.

Random Copolymers (RACO)
Random copolymers are derived through modification of the polypropylene chain by the addition of small amounts of comonomer, resulting in modified properties when compared with HOMO PP.

Random copolymers provide significantly improved optical properties (haze and gloss), improved hot sealing characteristics, as well as improved impact performance. RACO PP resins show good chemical resistance against most inorganic acids, alkalis and salts, as well as good resistance to environmental stress cracking.

RACO PP resins are widely used as a skin layer in extrusion applications for flexible packaging and in injection moulded consumer goods due to their excellent optical properties.

Heterophasic Copolymers (HECO)
Heterophasic copolymers are achieved by polymerising a rubber component within the polypropylene matrix polymer. The resulting polymers exhibit a good level of stiffness, due to the matrix polymer combined with excellent low temperature impact performance thanks to the rubber component.

Heterophasic copolymers can serve applications in operating environments from deep freeze to microwave ovens. Due to the high impact performance, HECO resins are used in demanding applications including automotive bumpers, pails and crates, and sewage pipe systems.

Heterophasic copolymers are available in a broad range of melt flow rates (MFR) and can be converted with all major technologies, ranging from pipe extrusion, blown film, to injection moulding or TWIM.

HMC Polymers' Trademark Grades

The Moplen group of products represents traditional polypropylene resins based on HOMO, HECO or RACO structure. HMC Polymers continuously works on improving these resin types in order to allow our customers to produce products of the highest quality and greatest cost efficiency.

Adstif resins represent a group of polymers featuring superior stiffness, well ahead of traditional polypropylene resins. The stiffness of Adstif products helps our customers produce goods with reduced thickness, which translates into raw material and cost savings.

Adstif type resins combine utilisation of the latest catalyst developments with HMC Polymers’ advanced production technologies.

The Clyrell family of resins is characterized by a superior transparency level versus traditional resins. In order to achieve the highest level of transparency, HMC utilizes novel structural design capabilities of its assets.

The highly transparent resins allow our customers to produce goods with superior properties, enabling inter-material replacement of traditional materials, such as glass as well as engineering resins such as Polycarbonate.

Purell PP grades for the medical market are made under specific manufacturing procedures and offer consistency of formulation, continuity of supply, and are certified according to regulatory standards such as US Pharmacopeia, European Pharmacopeia and Drug Master File listing supporting the use of the resins in medical and pharmaceutical applications.  Purell full page ad

Adsyl resins are propylene plus ethylene and butene based random copolymers and terpolymers with high comonomer ratios that deliver improved sealing properties. Adsyl resins can be used in all of the main film extrusion technologies, such as BOPP, double bubble, cast and blown film. Adsyl grades are mainly used for skin layers in co-extruded or coated film structures to provide sealing functionality.

Hostalen PP
Hostalen PP is a PP copolymer used by customers for piping applications, sheet extrusion and injection molded plumbing fittings. Hostalen PP is specified for pressure pipe and hot water distribution, drainage and sewage pipe systems. Hostalen PP meets all applicable hot water standards and the PPR-100 cold water classification, and its high stiffness supports sophisticated double wall and spiral wound large diameter applications.