The Importance of Monitoring the Tension of Fibers

Posted by Maureen Redmond on Sep 28, 2020 3:14:04 PM

In upstream composites production processes, it is often necessary to control a fiber 

or a band of fibers to an optimum tension value. However, identifying the correct tension is often overlooked, and production processes still utilize tensioning systems which were developed decades ago without much consideration.

If the starting tension at the creel is not controlled properly, then the final product may be constructed of fibers with varying tension. As a result, it will not fully utilize the strength of all fibers equally. This can degrade the mechanical properties of the final product.

 

 

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Topics: Carbon FIbre, Tension Control

The Essentials for Applying Sizing to Carbon Fibers

Posted by Maureen Redmond on Jul 20, 2020 10:29:26 AM

With the increasing variety of resin systems available for carbon fiber and other high-performance fibers, there is a growing need for development of sizing materials which interface well with each resin/fiber combination.

For the development of the sizing material, it is often difficult to experiment without obtaining un-sized fiber. Unless you produce the fiber in your own facility, in many cases it would be necessary to de-size the fiber first, and then apply the desired sizing materials.


Any handling process can damage the fibers, and de-sizing / re-sizing can be particularly abrasive to the fiber. Thus, equipment for this process needs to put this factor into consideration, and must be as gentle or even more gentle to the fiber as the in-line sizing process during the production of the fiber.

We can provide turn-key systems for single tow sizing development lines as well as multi-tow sizing lines for production scale output requirements. Single tow lines are scalable and configurable: in many cases they are compact table-top units. Production scale lines incorporate industrial-grade equipment, same as the equipment we provide for fiber production plants.

See below for some considerations for specifying the right equipment for the sizing line you may need.

 

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Topics: Carbon Fiber, Industrial Automation, Speed and Length Calibration, Robotunits, Tension Control

The Importance of Tension Control for Carbon Fiber Processes

Posted by Maureen Redmond on Jul 9, 2018 2:25:53 PM

The importance of the accuracy of the tension coming off of a creel or let-off is forgotten at times.  Extensive design effort is put into the equipment to actually produce the sheet or tube formed from carbon fiber, but in many cases the front end of this process is overlooked.

The accuracy of tension coming off of the creel can influence the mechanical properties of the part, and either enhance or degrade it depending on the tension control. In some cases, it is not the absolute value of tension which is important, but the minimization of deviation of tension between ends. A single tow of fiber with higher tension than the others could degrade a UD sheet or a pultruded part….etc.

We have many success stories from our customers implementing our creels. Uniformity and improved characteristics of a UD sheet or tape, better mechanical properties observed in a pultruded part, stronger filament wound products, and better strength in a woven fabric.

See the details below for further types of creels available.

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Topics: Carbon Fiber, Tension Control