At Gemme Plast we are able to inject every kind of technical thermoplastic material. In particular we have many years of experience in PP and PVDF injection moulding, with different percentages of reinforcing materials.

Environment and sustainability have a great importance to us. That’s why we also use recycled materials (such as recycled polypropylene), in a view of circular economy.

Surely, the appearance of the piece is relevant too. For this reason we use several kind of Masterbatch which makes the pieces bright and colourful.

Below we provide a list of technical polymer that can be injected at Gemme Plast.

It’s a semi-crystalline thermoplastic polymer, belonging to the polyolefin class, that can be used in a wide variety of applications thanks to its easy processing.

PP has a good resistance to temperature and chemical solvents –both acids and bases -.

These qualities make PP the most broadly used thermoplastic material in the automotive and synthetic fibers industry. Because of its lower values of traction and compressive resistance, it’s often used in a compound with different fillers, such as:

-Glass fiber: adding PP this fiber allow to obtain structural advanced materials with high mechanical resistance and resilience.
-Carbon fiber: this fiber gives lightness and high mechanical resistance to the compound. It’s commonly used in those applications in which the highest performance are required.
-Talc: this filler increases creep resistance and elastic modulus.

Its operative temperature range is +5°C /90°C.

These are technopolymers used in high technology applications or in particularly aggressive environment.

PVDF (Polyvinylidene fluoride): it’s a partly fluorinated polymer, much easier to work than other fluoropolymers.

It has as excellent chemical resistance and better values of mechanical strength than other fluorinated polymers.

The rigidity , the anti-friction qualities and the high abrasion resistance make the PVDF suitable for applications in which high temperature stability is required.

In order to further improve its mechanical properties, keeping a low specific weight, PVDF can be filled with carbon fiber.

Its operative temperature range is: -40°C / 150°C.

This is an amorphous copolymer belonging to styrenic resins class, with excellent mechanical properties.

Tough and strong at low temperature too, ABS has high hardness and good breaking and scratching resistance.

It does not resist to benzol, oil and solvents. Adding glass fiber, ABS increases the elastic modulus and the mechanical resistance but at the expense of tenacity. It’s widely used in manufacturing of automotive components and pipelines.

Its operative temperature range is -40°C a +80°C .

It is a synthetic aromatic polymer. Under normal condition, PS has hardness, rigidity and transparence, but also brittleness. Chemically inert to many corrosive agents, PS is soluble in solvents such as acetone and benzene. It can be used as compound in order to improve its mechanical, chemical and light resistance properties.

Its operative temperature range is -40°C a + 70°C.

Polyamide, commonly known as Nylon, is a thermoplastic material, widely appreciated for its mechanical properties. It has a low friction coefficient and a good wear resistance.

Properties and temperature range depend on the type of polyamide, classified according to the carbon atoms number in the main chain. The most common types of PA are PA6, PA6.6, PA11.

-Nylon 6: effective in normal condition, it quickly absorbs moisture and loses resistance as temperature increases. Nevertheless, it can easily be machined and it is used in fiber production. Its melting point is about 228°.

-Nylon 6,6: very common commercial polyamide, Nylon 6,6 is a crystalline translucent material, with a melting point of 269° that makes it the most high temperature resistant PA. In normal condition it absorbs more than 2% of moisture from the air: absorbed water increases shock resistance and flexibility in moist environments.

-Nylon 11: it has a good hardness and shock and abrasion resistance, although its mechanical properties are lower than other PA.

For its extraordinary moisture absorption power, it’s not recommended the use in wet areas.
PA with molybdenum disulfide are usually distinguished by fiber glass fulfilled PA, characterized by an higher elastic modulus.

It’s an aromatic filled with glass fiber. to obtain a high breaking resistance comparable to that of some metals. For its rigidity, chemical resistance and ease of processing it can be used in the transport, medical and electronic industry.

Its operative temperature range depends on the type, up to 130°.

It’s an amorphous polymer, commonly known as Plexiglas. Its main properties are brightness and transparency. For this reason it can be used as an alternative to glass in articles for which a resistance to sunrays and weather agents is required.

Maximum operative temperature: +60°C

Crystalline polymer also known as acetal resin. It has a good chemical resistance, with high hardness, tenacity and dimensional stability. These properties make POM suitable for mechanical components (gears, bushes, pipe fittings, pump bodies). In order to further improve his mechanical qualities, POM is often filled with glass or carbon fiber.

The operative temperature range is from -40°C to +80°C.

This polymer is often used as glass replacing for his transparency and impact resistance. It’s light, strong and easy to process. It has a low absorption capacity and a good chemical resistance to oil, organic solvents and greases. PC typical applications are in the automotive, medical, building and consumer good industry.

Its operative temperature changes, according to the PC type, from -190° to 130°.

It’s the most common plastic. It can be classified by its density and branching:

HDPE (High-Density Polyethylene): this polymer is little branched, with more hardness and tensile strength than LDPE, and it can also resist higher temperature (up to 110°).

LDPE (Low-Density Polyethylene): it has more branching than the HDPE, giving it less mechanical resistance but greater resilience. It can resist high temperature up to 80° and has an excellent chemical resistance to diluted acid or basic solutions, alcohols and esters.

PE is broadly used in food packaging, chemical industry and automotive sector.

Amorphous thermoplastic material that has an high elastic modulus and an excellent impact resistance. For its chemical resistance to acids is mainly used in galvanizing and petrochemical industry.

The application temperature range is from -10°C to +70°C.

It’s an high performance semi-crystalline technopolymer that has a low moisture absorption power. Because of its high-temperature resistance (up to 210°) and its chemical resistance to corrosive liquid, PPS is often used for acid pumps impeller. Generally, it’s widely used in pumping, electricity, automotive sector. It can be also filled with glass fibers in order to increase thermal stability and hardness.

Semi-crystalline thermoplastic polymer with excellent mechanical and chemical performance, in high temperature context too. Its melting point is relatively very high (about 340°).

Easy to process in solid form, PEEK has a good abrasion and wear resistance, with an high elastic modulus.
For its properties, PEEK is used in different sectors (medical, aeronautic, automotive), when extreme conditions resistance is required.

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