Buy plastic semi-finished products online | Martan Plastics

Plastic semi-finished products are the basis for numerous technical components in mechanical engineering and in many other industrial sectors. At Martan Plastics you can obtain thermoplastic plastic semi-finished products made from standard, engineering and high-performance plastics – including PE, PP, POM, PA, PC, PTFE, PVDF and PEEK.

Depending on the material and requirement, plastic sheets, rods and other semi-finished product forms are available for subsequent machining. Frequently required plastic semi-finished products can be selected directly via our plastic online shop. For special dimensions, materials, cut pieces or further-machined components, we support you with individual solutions.

POM-C sheets black

What are plastic semi-finished products?

Plastic semi-finished products are pre-manufactured materials that serve as the starting material for the production of technical components. Thermoplastic plastic semi-finished products can be deformed by heating and then solidified again. In addition, depending on the semi-finished product and material, they can be further processed by milling, turning, drilling, sawing or other methods.

Typical plastic semi-finished products are plastic sheets, rods, tubes, profiles, blanks and cut pieces. Which plastic semi-finished product is suitable depends on the later application, the desired geometry and the required mechanical, thermal or chemical properties.

Thermoplastic plastics differ from thermosets and elastomers in that they can be heated and reshaped again under suitable conditions.

Properties and advantages

Thermoplastic plastic semi-finished products are characterised by a wide range of positive material properties that predestine them for industrial applications:

• High formability: They can easily be brought into complex geometries by heat.
• Resistance: Resistant to mechanical loads, chemicals and environmental influences.
• Long service life: High stability and low wear ensure economical use.
• Easy processing: Suitable for various machining techniques such as milling, turning, drilling or welding.
• Low weight: Despite high strength, they are significantly lighter than metallic alternatives.
• Good electrical insulation: Many thermoplastic plastics are excellent insulators and ideal for electrotechnical applications.
• Recyclability: Thermoplastic semi-finished products can be recycled and reprocessed, which makes them particularly sustainable.
• High temperature resistance: Many of these plastics withstand high temperatures without losing their mechanical properties.
• Resistance to moisture and UV radiation: Some variants are particularly resistant to external environmental influences and are therefore suitable for outdoor use.

Frequently used thermoplastic materials include, among others, polyethylene (PE), polypropylene (PP), polyamide (PA), polycarbonate (PC) and polyvinyl chloride (PVC). Depending on the requirement, special high-performance thermoplastics such as polytetrafluoroethylene (PTFE) or polyetheretherketone (PEEK) are also used.

Plastic semi-finished products by material

For technical applications, thermoplastic semi-finished products made from numerous standard and high-performance plastics are available.

Material	Typical properties and main areas of application
PE	high toughness, low water absorption and good chemical resistance
PP	low weight and good resistance to many chemicals
POM	high dimensional accuracy, strength and good sliding properties
PA	high mechanical load capacity and wear resistance
PC	high impact strength and good dimensional stability
PTFE	very high chemical resistance and very low friction
PVDF	high chemical and thermal resistance
PEEK	high mechanical, chemical and thermal load capacity

In particular, PEEK semi-finished products, POM semi-finished products, PTFE semi-finished products and PVDF semi-finished products are used when standard plastics do not meet the technical requirements, or only to a limited extent.

Processing techniques

Thermoplastic plastic semi-finished products can be further processed by a wide range of manufacturing processes. These include:

• Injection moulding: Suitable for the mass production of complex components.
• Extrusion: Production of tubes, profiles and films.
• Thermoforming: Deformation of plastic sheets by heat and vacuum.
• Milling, turning and drilling: Mechanical machining for precise components.
• Welding: Joining of plastic parts for a stable construction.

What plastic semi-finished products are there?

Plastic semi-finished products are pre-manufactured materials that serve as the starting material for further processing into technical components. They are offered in different forms and dimensions and are then further processed, for example by milling, turning, drilling or cutting to size.

Typical delivery forms include:

• Plastic sheets for cut pieces, milled parts and flat components
• Rods for turned parts, bushes, rollers and other rotationally symmetrical components
• Tubes for structural and technical applications
• Profiles for individual constructions and guides
• Blanks and cut pieces as the starting material for further machining

The suitable semi-finished product form depends on the later component, the manufacturing process and the desired material use.

Areas of application

The versatility of thermoplastic plastic semi-finished products makes them indispensable for numerous industries. The most important fields of application include:

Mechanical engineering

Thermoplastic semi-finished products, such as plastic sheets or plastic rods, are used in the manufacture of precise and wear-resistant components. They reduce friction, minimise maintenance effort and extend the service life of machines. In particular, high-performance plastics such as PEEK offer exceptional resistance to extreme temperatures and aggressive chemicals.

Medical technology

Thanks to their high chemical resistance and ease of sterilisation, these plastics are ideal for hygienic applications. They are used in medical instruments, implants and laboratory equipment. Biocompatible thermoplastics such as PE-UHMW (ultra-high-molecular-weight polyethylene) are used in joint implants, while special plastics for single-use products in medical technology

Vehicle construction

In the automotive and aerospace sectors, thermoplastic semi-finished products are used for lightweight yet robust components. They help to reduce vehicle weight and thus improve energy efficiency. Thermoplastic composites are increasingly replacing metal parts, as they offer similar strength values at significantly lower weight.

Electrical engineering

In electrical engineering, thermoplastic plastics are in demand because of their excellent insulating capability. They serve as housing materials for electronic components, cable sheathing or switching units. High-performance thermoplastics such as polycarbonate are particularly resistant to electrical voltages and are therefore frequently used in protective housings.

Food industry

Food-safe thermoplastic plastics such as PP and PE are ideal for packaging, transport containers and machine components in food production. They are flavour-neutral, chemical-resistant and easy to clean, which means they meet the industry's high hygiene standards.

Construction

Thermoplastic semi-finished products also play a decisive role in construction. They are used in façade cladding, window profiles, tubes and insulation materials. Due to their durability and weather resistance, they offer an economical alternative to classic building materials.

Buy plastic semi-finished products

Plastic semi-finished products can be obtained, depending on the material, as sheets, rods and other delivery forms. For the selection, in addition to the plastic, dimensions, material thickness, diameter, colour and the required technical properties are particularly decisive.

For frequently required plastic semi-finished products, sheets and rods are available directly in the plastic online shop. For special materials, dimensions or further-machined semi-finished products, individual solutions are possible.

Thermoplastic plastic semi-finished products offer a unique combination of flexibility, resistance and ease of processing. They are the first choice for numerous industrial applications where precision and durability are required. Through their easy processing, high resistance and recyclability, they also contribute to sustainability in industry. Our high-quality thermoplastic semi-finished products, including plastic sheets, plastic rods and other engineering plastics, are available in different versions – contact us for individual advice and tailor-made solutions!