Technical Center Biotextiles and Medical Textiles

For the development of fiber-based biotextiles and medical textiles, we make use of various textile processes and the following machinery available at our technical center:

Electrospinning Machine

© ITM/TUD

Technical Data	Features
Producer: In-house development Number of electrodes: 1 Rate of flow: 0.73 µl/h - 1699 ml/h Spinning voltage: 0 - 100 kV Spinning distance: 60 – 300 mm	Production of micro and nanofiber nonwovens Interchangeable spinning electrodes Interchangeable collectors Spinning electrode shield Capable for water and non-water soluble polymers Commonly used polymers on the machine: PVP, PCL, PLA, PS, Collagen, Chitosan

Flocking System KFG 800

© ITM/TUD

Technical data	Features
Manufacturer: Company Maag Flockmaschinen GmbH Electrostat EK 200-80 delivers high voltage ranging from 10 - 80 KV Outer dimensions of the flocking cabin: 800 x 800 mm Metal grid: 600 x 600 mm Distance between metal grid and tray: 130 mm	The flocking cabin type KFG 800 is a manual flocking system, flocking occurs from top to bottom. The flocking fibers placed on the fiber tray are tightened over the metal grid and accelerated. A grounded component on a holder is placed in the KFG 800 so that the flock moves to the adhesive surface. During flocking, this component is rotated manually.

Piston solvent spinning machine

© ITM/TUD

Technical data

Features

manufacturer: Fourné Maschinenbau GmbH max. volume of storage tank: 1558 cm³, heatable to up to 120 °C throughput: 0.68 to 7.49 cm³/min heatable (to up to 80 °C) coagulation bath 90 l, heatable 20 l storage tank heatable (90 °C) elongation washing bath 30 l, heatable 20 l storage tank roller contact dryer, max. 240 °C three roller duos, speed between 3 and 50 m/min preparation roller made of sintered corundum SAHM cross coil winder, 5 to 50 m/min

air gap unit machine is located in a clean room (class ISO 7/GMP C), thus enabling the manufacturing of textile yarns for medical and other technical applications maximum pressure of 80 bar is feasible in the storage tank of the spinning solution

Laboratory Fiber Converter

© ITM/TUD

© ITM/TUD

Technical Data	Features
In-house development Flexible material feed Up to 8 parallel yarn systems Cutting length, cutting speed and quantity desired are individually adjustable by the electronic control Removal and storage of the cut fibers using exhaustion	Machine for cutting of fibers and filaments to short fibers or flock fibers Cutting fibers for biodegradable implants generated via flocking and Net-Shape-Nonwoven technology Suitable for synthetic fibers and biopolymers

Lab Carding Machine Mesdan 337A

Technical Data	Features
company: MESDAN natural, man-made fibers working with from 5 to 50 cm output: up to 3 kg/h variable take-off speed from 8 to 12 m/min	experiments can also be performed with just a few hundred grams of material three individually adjustable work stations (workers-stripper pairings) available

Electrospinning Machine

© Elmarco

Technical Data	Features
Producer of the electrospinning unit : Elmarco Total number of spinning electrodes: 1 Spinning electrode width: 500 mm Integrated unwind / rewind Spinning voltage: 0 - 80 kV Spinning distance: 70 – 210 mm Substrate speed: 0,13 – 1,57 m/ min Substrate width: 600 mm Effective width of nanofiber layer: 500 mm	Production of continuous micro and nanofiber nonwovens Interchangeable spinning electrodes Capable for water and non-water soluble polymers Commonly used polymers on the NS LAB 500: PA 6, PVA, PAN, PES, PVDF, PUR, PAI, PAA, PCL, PLA, PSU, PS, Cellulose acetate, Collagen, Gelatin, Chitosan

Net-Shape-Nonwoven Machine

© ITM/TUD

© ITM/TUD

Technical Data	Features
In-house development 4 print heads for short fibers 1 pneumatically operated print head for highly viscous media 1 piezo-driven print head for low-viscosity media	Additive manufacturing technology Processing of biopolymer short fibers Simulation based design Arbitrary geometries Development of customized implants with tissue adapted inner structural composition

Circular Braiding Machine RU 1 / 32-80

Technical Data	Features
Manufacturer: August Herzog Maschinenfabrik GmbH & Co. KG	production of vascular implants (“stents”) realization of smallest braiding diameters as well as curved implant shapes

Specialty Braiding Machine RU 2/12-80

Technical Data	Features
Manufacturer: August Herzog Maschinenfabrik GmbH & Co. KG double-headed	for the production of surgical sutures

In addition to testing technology already available at our institute for the physical and chemical characterization of textile high-performance materials, they can also be evaluated in terms of their biological properties. Particularly for the development of novel bio and medical textiles, a biological characterization can be a valuable tool to assess potential biological and medical risks for the future clinical use of textile medical products. For this purpose, the ITM is equipped with a cytological laboratory, where polymer samples, filaments, and fabric prototypes are tested to determine their suitablity for use in biomedical applications.

Several flock testing devices are available at the ITM, which are mainly used for the evaluation of mechanical properties of fiber-based, additively manufactured scaffold structures that were generated using flocking technology and net shape non-woven technology.

© Mirko Krziwon

Name

Mr Dr. Michael Wöltje

Research Group Leader Biomaterials and Medical Technology

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Visiting address:

Breitscheidstr. 78, House D, Room 1.1.13

01237 Dresden

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