Medical Extrusion

mf extrusion

Plastic extrusion is a large-scale manufacturing process where a polymer material is melted together with additional materials to shape in a continuous process. Pressurized molten plastic is moved into a premade mold, where the material cools and hardens. Later, the workpiece is removed from the mold, machined and finished, and sold. Plastic extruding is an ongoing molding process; the injecting machine can fill the mold repeatedly after the hardened piece is released.

Extrusion or molding – the plastic extrusion opportunities are endless. At Seisa, we’re pleased to offer coextrusions and multi-lumen extrusion to our customer’s designs and specifications.

Seisa Medical has over 35 years of organic growth experience as a medical Catheter extrusion technology leader.

Seisa Medical has been a technology leader in the field of medical catheter extrusions for nearly four decades. Seisa offers the broadest range of extrusion technologies for medical devices in the industry. Medical device companies worldwide continue to rely on Seisa for one-stop-shopping of medical catheter extrusion technologies and minimally invasive tubing.

  • We obtained the first of several FDA 510K clearances for Seisa devices in 2015.
  • We manufacture catheter-based products, implantable stents, tubing sets, and pediatric and orthopedic-care products, among many others.
  • Seisa procedures comply with FDA requirements to fulfill manufacturing devices for Class I, II, and III products.

The medical extrusion punching system has been developed for efficient and high-strength quality processing of polymers. The continuous technological process applies to force the melt of the starting material through the void to form the finished product. Our Extruders are standard for the production of the following:

  • Medical tubing
  • Coextruded tubing
  • Multilumen tubing
  • Substrate coating (wire, celcon and other metal or plastic substrates)

What plastics can be used for medical manufacturing extrusions?

The broad functionality of current extruders permits technologists to work with various raw materials within the framework of production charges. The subsequent polymers can be successfully applicable:

  • Shockproof plastic
  • Elastomer
  • Nylon
  • Polyvinyl chloride
  • Polypropylene, etc.

The medical extrusion technology also allows the passing various rubber, starch-containing, and protein-containing mixtures and plastics. Moreover, it arrives through the extrusion-forming head.

Seisa offers a wide range of extruding services

Look at our full capacity of extrusion materials, processing capacities, and secondary operations.

Our standard and custom shapes can be made in manufacturing areas worldwide so that you will have global resources with a local grade of service.


No single material excels in every atmosphere, and some applications need a combination of materials to form an optimal solution.

Coextrusion permits you to combine different materials to get additional characteristics to create a product that delivers numerous benefits. For example, a fluoropolymer tubing liner for superior chemical resistance related to a TPE jacket, giving softness when laying on a patient, would provide a solution that presents more to you and your customer.

Multi-lumen Extrusion

In material engineering, A multi-lumen extrusion is tubing with more than one chamber (or lumen) inside the ID with only an outer diameter.

In medical manufacturing applications, multi-lumen tubing components can be utilized for medical devices that deliver a variety of fluids or drugs simultaneously without cross-contamination and can help decrease the number of procedures on a patient.

Extrusion Process and Machinery

At Seisa medical device manufacturing, we employ a variety of advanced equipment supplies to fulfill plastic extrusion demands. The two major pieces of equipment are extruders and die.


Powdered or granular plastic is held in a hopper above an extruder channel. To start extrusion, the bottom of the hopper is opened, and plastic soaks downward into the extruder inlet due to the natural force of gravity. At this point, either direct heat or friction from a turning operational screw will heat the plastic into a molten state. The melted plastic flows via the channel to the die.


A specially designed plastic extrusions die is linked to the end of the extruder’s pipeline, and the molten plastic fills the whole design at a consistent pressure to mitigate the hazard of gaps or bubbles. The die continually forces the molten material through until the process is clogged or the material runs out. The plastic cools as it rejects the die, after which the extrusion can be shrunk to the length desired.

Plastic extrusion dies are custom-made to consider the exceptional fluid conduct of plastics. Designers account for complex shapes, extra molten material, and how to best medium the plastic and force out air.

Extrusion Benefits

When molding pieces with a constant cross-section, the technique supplies greater flexibility. Similarly, it allows for the large production of parts and blanks. For this manufacturing purpose, one or more polymers are helpful for use as raw materials. It has extrusion and other benefits that provide the technology with a stable competitive position in various industries.

Budget costs:

A solid injection of capital is optional when launching an entire production line. Furthermore, the method is unique in its minimal expense.


In production, we recycle raw materials. Moreover, it reduces the quantity of waste and pollution on the planet to keep an ecological balance.

Continuous work:

The medical extrusion die-forming line drives continuously. Therefore, it allows factories to work multiple shifts 24 hours a day. It is to achieve expected profitability. Enterprises are effectively improving their turnover and expanding the hierarchy of their activities.

Why partner with Seisa Medical for your medical plastic extrusions?

With 150,000 square feet of class 7 & 8 cleanroom manufacturing capacity, 510K generation services, state-of-the-art prototyping and testing technology, and vertically-integrated device manufacturing abilities, Seisa is fully qualified to provide a broad range of solutions to fulfill our customers’ requirements.

Our manufacturing locations are FDA-registered and ISO 13485 compliant. A fully equipped laboratory for incoming raw materials, online statistical procedure control, and an extensive array of contact and non-contact inspection technologies ensure that every product requirement is satisfied.

For decades, we’ve provided our global clientele with innovative solutions to their most complex tubing issues. Discover how our engineering expertise can benefit you by conversing with one of our knowledgeable representatives today.

  • 37+ years of experience with medical devices extrusion services
  • Innovative design and research expertise
  • In-house ISO-certified production facilities

Medical Extrusion FAQ

Q.How many steps require in Medical Extrusion?

A. The first step of the production procedure is the supply of suitable plastic raw materials (Plastic pellets). They are placed in the hopper, on the extruder barrel. Extra additives present in the composition to improve the performance effects of finished products – UV inhibitors and dyes. These materials penetrate the feed throat at the end of the barrel and then contact the auger.

Q. Why is Extrusion needed?

A. The technology has undeniable advantages, like extrusion processes can be automated as much as possible. It qualifies for the necessary revision and adjustments to the geometric shape with little time and labor.

Q. What products are created using the medical extrusion technique?

A. Modern and functional tools for the medical extrusion of acetal, polyethylene, polycarbonate, nylon, PVC, etc., are installed in the production enterprise stores.

Furthermore, it is used for the production of profiles of various complexities:

  • Medical tubing for catheters
  • Reinforced tubing
  • Multilayer tubing
  • Coating
  • Packaging tubing
  • High pressure medical tubing

Lets Connect