where expertise comes together - since 1996 -

The Largest Open Access Portal of Nondestructive Testing (NDT)

Conference Proceedings, Articles, News, Exhibition, Forum, Network and more

where expertise comes together
- since 1996 -

488 views
Technical Discussions
Sherry Whitaker
Sherry Whitaker
06:20 Apr-28-2003
measuring thickness of coextruded plastic

I am trying to find a sound analytical technique to measure the thickness of a layer of co extruded crystallized plastic. Approximate total thickness of about 20-25ml , the top layer needing measured is around 5 to 10% of total.

Any info you can provide will be appreciated.


 
 Reply 
 
Dr. Patel
Dr. Patel
04:57 Apr-29-2003
Re: measuring thickness of coextruded plastic
: I am trying to find a sound analytical technique to measure the thickness of a layer of co extruded crystallized plastic. Approximate total thickness of about 20-25ml , the top layer needing measured is around 5 to 10% of total.
.
: Any info you can provide will be appreciated.
.
We have measured plastic thickness down to 100 micron with micron accuracy. The system can be used for on-line application. If you are interested please contact me at fallon@netcom.ca. We are using very simple pulse echo technique with broadband pulse of 50 MHz. Some error may occur due to nature of plastic where velocity of material may change.
Regards
Dr. Patel
Fallon Ultrasonics Inc
905-388-7853
Fax 905 387 5897


 
 Reply 
 
Neil Burleigh
Sales
Krautkramer Australia Pty Ltd, Australia, Joined Dec 2002, 159

Neil Burleigh

Sales
Krautkramer Australia Pty Ltd,
Australia,
Joined Dec 2002
159
05:29 May-08-2003
Re: measuring thickness of coextruded plastic
: : I am trying to find a sound analytical technique to measure the thickness of a layer of co extruded crystallized plastic. Approximate total thickness of about 20-25ml , the top layer needing measured is around 5 to 10% of total.
: .
: : Any info you can provide will be appreciated.
: .
: We have measured plastic thickness down to 100 micron with micron accuracy. The system can be used for on-line application. If you are interested please contact me at fallon@netcom.ca. We are using very simple pulse echo technique with broadband pulse of 50 MHz. Some error may occur due to nature of plastic where velocity of material may change.
: Regards
: Dr. Patel
: Fallon Ultrasonics Inc
: 905-388-7853
: Fax 905 387 5897
.
Some years ago I was involved in trying to measure the total wall thickness of co extruded plastic containers. The total thickness was about 2.0 - 2.5 mm which comprised of three layers with the centre layer being made from recycled plastic.Using ultrasonics, a digital caliper, we were not able to penetrate the full thickness and were only ever able to measure the first layer which was about 0.5mm thick. We used a 22MHz probe on a gauge type CL202P.
Therefore depending on the grain size of the crystalized plastic outer layer you should try using a shockwave probe in the frequency of 15 - 25 MHz plus a UFD high frequency capabilities or a Krautkramer thickness gauge from the CL range.
If all this doesn't work can you send a sample to us for trials.

Regards



 
 Reply 
 

Product Spotlight

ISONIC 3510

Very Powerful Superior Performance Extremely Portable Smart Phased Array Ultrasonic Flaw Detector an
...
d Recorder with 2 Conventional UT and TOFD Channels uniquely combines PA, single- and multi-channel conventional UT, and TOFD modalities providing 100% raw data recording and imaging. Suitable for all kinds of every-day ultrasonic inspections
>

GEKKO - Portable Phased Array Testing with TFM in Real-Time

The portable phased array testing system GEKKO provides 64 parallel test channels. On creating testi
...
ng parameters the operator is assisted by the CIVA software. Due to its modular set-up the GEKKO instrument is suitable for operators of all skill levels.
>

TESTD-PT SYSTEM

Pulse thermography is a non-contact test method that is ideal for the characterization of thin fil
...
ms and coatings or the detection of defects. With a remarquable short test time and a high detection sensitivity, the Telops TESTD-PT is the perfect tool for non- destructive testing. With such high frame rates, it is even possible to investigate highly conductive or diffusive materials.
>

Combination of Digital Image Correlation and Thermographic Measurements

The combination of measuring results from the digital image correlation (ARAMIS, DIC) and temperat
...
ure measuring data from infrared cameras permits the simultaneous analysis of the thermal and mechanical behavior of test specimens in the materials and components testing field.
>

Share...
We use technical and analytics cookies to ensure that we will give you the best experience of our website - More Info
Accept
top
this is debug window