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Monday, April 25, 2016

Comparison of Two Variables of Common Roughness/Smoothness Testers

Flow restrictor used to calibrate air-leak instruments
There are numerous published inter-conversions of data between various roughness/smoothness testers. These should be used with the understanding that the only way to achieve unequivocally valid data of a particular instrument type is to use the specified instrument for the required testing. There are strong proponents for each of the instruments discussed here, as well as additional instruments familiar in different parts of the world. The user must make the decision which instrument is most useful for a specific property measurement task.

The following chart shows some smoothness values for different papers measured with the Sheffield, Gurley and Bekk testers.

Source: Abbott, J.C., "A Training Presentation Prepared for Technidyne Corporation", April 4 & 5, 2000.

Friday, April 22, 2016

Technidyne Survey

Please let us know how we are doing. The Technidyne Customer Survey is on our website.

Technidyne strives to become a trusted partner with each of its customers. In order to do this there must be open communication and a willingness to work together. In an effort to address weaknesses and understand strengths in the Technidyne approach we must have honest feedback.

It also helps us understand the expectations our customers have in terms of:

  • Customer need & innovation
  • Price & ROI
  • Support
  • Product quality & reliability
  • Contact achievement
  • Mill success
  • Outstanding employees
We always welcome your feedback to make Technidyne Corporation a better partner for you and other customers.

Go to the survey HERE, or go the Technidyne website and under "Contact Us", you will see the link to the survey.

Monday, April 18, 2016

From the Testing Lab: Tensile

Most tensile testers today are vertical or horizontal and subject the specimen to a constant rate of elongation.

Units of Reported Values
     Tensile breaking strengths are reported as the force per unit width required to rupture the specimen. Some of the common units for reporting tensile breaking strength are lb/in and kN/m. Tensile breaking strength corrected for grammage is called the tensile index.
     A similar quantity, called the breaking length, is also used for reporting grammage-corrected tensile strength. Breaking length is defined as the length of a strip of given paper that will cause it to break under its own weight. It is calculated by dividing the tensile breaking strength by the grammage. The tensile strength may be expressed in kilograms force per meter for this calculation or one can use customary basis weight and tensile units.

Why is Tensile Breaking Strength Important?
     Tensile strength is a direct indication of the durability and potential end use performance of a number of papers that receive direct tensile stresses in use, such as wrapping, bag, gummed, tape, cable wrapping, twisting papers, and printing papers.
     In general, a certain minimum tensile strength is required of an paper that undergoes a web converting operation where it is subjected to tensile stresses while being pulled through the process. Printing papers are a primary example of this.
Tensile property data for several different grades of paper
How is Tensile Strength Increased?
     There are several ways to increase the tensile strength of paper. For example, increasing beating or refining, increasing wet pressing, adding a beater adhesive, increasing the long fiber content of the furnish, and increasing the basis weight will all usually lead to an improvement in tensile strength.

Source: Scott, William E., Trosset, Stanley, Properties of Paper: An Introduction. TAPPI Press, 1989.

Tuesday, April 5, 2016

Where does the term Elrepho come from?

Elrepho with liquid cooling unit
The Zeiss Elrepho was introduced in the 1950's by the Carl Zeiss Company of Oberkochen, West Germany.  It was a diffuse (sphere) geometry brightness instrument developed for the Paper Industry. The instrument had a needle read out and the lamp was so hot, it required a liquid cooling unit.  The term Elrepho was a shortened version of Electro-recording photometer.

The Elrepho with its integrating sphere (diffuse) geometry was adopted by the European and Canadian Paper Industries and ISO created ISO 2469 as the standard for measuring brightness. The Elrepho remained the only instrument manufactured in accordance with European, Canadian and ISO standards until Technidyne Corporation introduced the Technibrite TB-1 in 1980.

Since that time Technidyne has developed and manufactured several generations of diffuse instrumentation according to ISO 2469 (Technibrite TB-1 [2-piece], Technibrite Micro TB-1C, Technibrite TB-1 [1-piece] & Color Touch family). The Color Touch was initially released in 1994. This instrument changed the capabilities of diffuse instruments with unique features such as automatic calibration (no manual data entry), an internal swing-in standard and an integrated computer with touch screen interface. These are all still uniquely Technidyne Color Touch™ features.

1950's - Zeiss Elrepho
1980 - Technibrite TB-1 [2-piece]
1984 - Technibrite Micro TB-1C
1990 - Technibrite TB-1 [1-piece]
1994 - Color Touch
1998 - Color Touch™ 2
2001 - Color Touch™ PC
2002 - PROFILE/Plus Color Touch
2015 - Color Touch™ X

Friday, April 1, 2016

Repair Turnaround Times Less Than 5 days

Mike has streamlined in-house repairs
In the summer of 2015, Technidyne made some changes and made a committed effort to reduce in-house repair turnaround times. At that point, the turnaround times were not terrible, but they were starting to drag. We needed to follow-up with customers to get an answer on quotes, purge the list of outstanding return authorizations, and ultimately improve the throughput in our service department.

We enlisted the efforts of long-time service veteran, Mike L. Since then he has done a tremendous amount of effort cleaning things up. He has made the process more efficient and the results are outstanding:

  • Instrument repairs that have shipped in the last 30 days had a turnaround time of 4.8 days
  • Turnaround time was 19.1 days in June 2015
Thanks to Mike for getting things back on track and for everyone else for helping Mike institute his vision of how to streamline the in-house repair part of the business.
Mike in 1989
Note: the turnaround time does not include the time the customer takes to make a decision on repair, replacement or disposal of the instrument.