Check here the list of TAPPI Technical Information Papers (TIPs) recently published:

TIP 0304-01 Procedure for setting up a raw material trial on the corrugator (Revised) WGC: Ted Altman
TIP 0416-16 Recovery boiler energy efficiency improvements (Revised) WGC: Andrew K. Jones
TIP 0425-06 Guidelines and Procedures for Inspections and Maintenance of Yankee Dryer Doctor Systems (New) WGC: Jerry Vandoros
TIP 0502-16 Pilot paper and wet laid nonwoven machines (Revised) WGC: Thomas E. Rodencal
TIP 0502-20 Catalog of Stock Preparation Pilot Plants (Revised) WGC: William Josephson

Special note: Documents appearing in the TAPPI online version of the Standards and TIPs are updated once a month (usually around the 15th). So it is possible that there is a delay between the publication announcement and the posting online. If you are a subscriber to the online access to Standards and TIPs and you are in a hurry for new documents that have not yet been posted, you can send a request for TIPs to tip@tappi.org or for Standards to standards@tappi.org. 

Listed below are TAPPI Standards that have recently gone out for ballot to the corresponding Standard-Specific Interest Group (SSIG). The date in parentheses is the closing date for voting.

T 203 cm-09 Alpha-, beta- and gamma-cellulose in pulp (March 31, 2019)

T 207 cm-08 Water solubility of wood and pulp (April 6, 2019)

T 221 cm-09 Drainage time of pulp (April 7, 2019)

T 235 cm-09 Alkali solubility of pulp at 25°C (April 12, 2019)

T 236 om-13 Kappa number of pulp (April 7, 2019)

T 249 cm-09 Carbohydrate composition of extractive-free wood and wood pulp by gas-liquid chromatography (March 31, 2019)

T 274 sp-13 Laboratory screening of pulp (MasterScreen-type instrument) (March 24, 2019)

T 428 om-13 Hot water extractable acidity or alkalinity of paper (March 31, 2019) 

T 455 sp-14 Identification of wire side of paper (April 18, 2019)

T 459 om-13 Surface strength of paper (wax pick test) (April 18, 2019)

T 494 om-13 Tensile properties of paper and paperboard (using constant rate of elongation apparatus) (April 11, 2019)

T 511 om-13 Folding endurance of paper (MIT tester) (April 18, 2019)

T 529 om-14 Surface pH measurement of paper (April 25, 2019)

T 569 om-14 Internal bond strength (Scott type) (April 18, 2019)

T 604 cm-09 Sulfur dioxide in sulfite cooking liquor (April 7, 2019)

T 656 cm-07 Measuring, sampling, and analyzing white waters (April 18, 2019)

T 804 om-12 Compression test of fiberboard shipping containers (April 19, 2019)

T 820 cm-09 Flexural stiffness of corrugated board (March 30, 2019)

The TAPPI Standards regulations require public review of standards that are up for ballot. Send a message to standards@tappi.org if you want to request a copy of the draft in ballot. If you would like to participate in the SSIGs that review and vote on the Standards, please contact TAPPI Standards Department at standards@tappi.org. 

Listed below are TAPPI TIPs that were recently submitted to the Working Group for review. The date when the Work Item was opened is shown for each TIP, as well as the Subject Category under which the TIP is assigned and the Working Group Chair's (WGC) name. The target completion date for the review of each TIP is one year after the opening of the Work Item.

0402 - Corrosion & Materials Engineering
Data and Calculations TIP - review requested by Working Group
02/25/19 TIP 0402-25 Guidelines for procurement of cast stainless steels for large pumps and valves for the pulp and paper industry. WGC: John Grocki

If you would like to participate in the Working Group to review any of these TIPs, please write to tip@tappi.org.

Migration of the Standards Online Balloting System

TAPPI Standards Online Balloting System, Kavi, will soon be migrating to TAPPI Connect. The migration will not affect any ballot that is currently opened, nor any roster, ballot results or any member’s information. All the information from the current balloting system (Kavi) will be automatically transferred to the new Workspace where normal activity will continue once the migration is completed.

The website that will be hosting the balloting system (Workspace) is TAPPI Connect, which means that SSIG members will get access to the balloting system with the TAPPI Connect login and password (this is the same login and password that is used for tappi.org). If you are a SSIG member and you don’t have a TAPPI Connect account yet, you may set up one through this link: https://connect.tappi.org/register.

The migration is set to occur the beginning of next week. The new Workspace will look very similar to the current balloting system, so current SSIG members will not need any additional training. However, a free webinar will be provided, hosted by Reid Baldwin of Higher Logic, on Friday, March 22, 2019 at 1:00 pm Eastern, and will cover log in information and any details that may be different between the two platforms. If you are a SSIG member, you should have received an e-mail with the meeting attendance information. If you have not received a meeting invite, please contact the Standards Department at standards@tappi.org.

The webinar will be recorded, in case anyone is unable to attend. Once the recording is available, it will be posted to TAPPI Connect.

Thank you very much for dedicating your time and knowledge to review TAPPI Standards!

The working group chair below is currently working on a draft to propose a new Standard:

WGC: Martti Tuomisto

Please find below the current scope of this new proposal:

New standard for measuring coating color viscosity at high shear rate.
Method: Capillary viscometer, shear rate 750 000 1/s

Coating colors are non-Newtonian materials, and therefore their rheology is complicated. The most important rheological factor is viscosity, and in case of coating colors it is strongly dependent on a shear rate. Coating color undergoes variable shear rates during the coating
process, varying from zero to several million 1/s. Therefore, measurements are needed in the whole shear rate area for the realistic simulation of coating processes. Rotational viscometers are suitable tools for screening the rheology of coating colors below the shear rate of 50 000 1/s, but
capillary viscometers, such as ACA AX, is needed for shear rates of 50 000 to 1.5 million 1/s.

There are two major groups of factors, which determine the rheology of coating colors: surface chemistry and hydrodynamics. Surface chemistry determines the rheology of coating colors in the low shear rate area (rotational viscometers). There are both attractive and repulsive forces
between the particles. If attractive forces are too strong, particles tend to flocculate. Viscosity increases and suspension becomes unstable. When the shear rate is high enough, structures break down, and viscosity depends mostly on hydrodynamic factors.

The most important hydrodynamic factors are:
- Solids content (i.e. volume fraction of particles)
- Particles size
- Particle size distribution
- Viscosity of continuous (water) phase
- Shape of the particles

ACA AX-100 is a capillary viscometer, which is specifically designed for measuring the viscosity of coating colors under hydrodynamic conditions, i.e. in the high shear rate area. Extrusion pressure is measured with a pressure transducer, and the displacement of the sample
cylinder is measured with a magnetic position sensor. Flow rate through the capillary is calculated based on the displacement of the sample cylinder and measurement time.

Well known, and generally accepted, equations of pipe flow are used to determine a viscosity
value as a function of shear rate. It is also described in the literature and generally accepted that
the pure hydrodynamic viscosity (ie. surface chemistry is not influencing anymore) can be measured at shear rates above 500 000 1/s. However, so far there has not been a standard method to describe high shear viscosity at such high shear rates. We are setting now a new standard at
the shear rate of 750 000 1/s. The standard is applicable to coating colors, surface treatments, pigment slurries, latex slurries etc…

Roll, blade, curtain and jet coating are presently the most used technologies for paper coating at high speeds. Coating colors are subjected to high stresses in all coaters, and shear forces are clearly above 500 000 1/s. Therefore, the new standard method can be used for simulations of
different coaters to help papermakers optimize blade pressures, coat weights and raw materials in order to avoid or solve runnability problems caused by coating colors.

If you would like to participate in the Working Group that is working on this draft or if you wish to join the correspondent SSIG to review the proposal once a ballot is opened, please write to standards@tappi.org

The scope of the proposal for a new Technical Information Paper is shown below, as well as the assigned Subject Category, the date when the Work Item was opened, the title of the new proposal and the name of the Working Group Chair (WGC).

0808 - Physical Properties
7/26/18 TIP 0808-XX Measurement of haptic properties of tissue by an objective measuring device

WGC: Giselher Grüner

This is to request development of a TAPPI TIP that would provide a method to characterize the haptic properties of tissue by simulating the human hand by an objective measuring device.
Fundamentals: The haptic feeling of the human hand based on different tactile cells/sensors in our finger tips, what detect vibrations respectively forces, which will be created by moving the fingers over the sample surface as well as by crumpling the sample.
The different cells are sensitive for different frequencies respectively load, what will be generated from the different structure dimensions and specific texture as well as the resistance against deformation (stiffness).
The haptic impression can be split into three basic parameters: micro-surface variations(what can be described as "surface softness"), macro-surface variations (what correlates to "felt roughness/smoothness"), and in-plane stiffness (what correlates to tensile test results).
Because of the nature of our hands and finger tips with the sensor cells, the individual signals will be conducted via nerves to the brain and combined there to an overall impression of the haptic quality of the sample.
Disadvantages of the hand tests are the subjectivity of the results, as well as the fact, that the hand can only feel a combination of the basic parameters. Because of that specific for samples with small differences it is impossible to distinguish by hand, if the difference is felt because of differences in surface softness, or smoothness, or stiffness.
Method and device: The instrument provide parameters, what correlate very good with the three basically parameters of the haptic: micro-surface variations, macro-surface variations as well as in-plane stiffness.
With the software of the instrument it is possible to calculate "HF" hand feel numbers as combination numbers of the three basic parameters (combined with grammage, thickness and number of plies), based on mathematical models of human panels. However, by using the three single parameters separate, information about the relationship of the different components of processes can be obtained.
The provided basically parameters of the device can be used to optimize the tissue production process, because it can help to identify the reasons for changes in overall quality. Because of that it can be used to perform adjustments on the machine, on chemicals or on the pulp. Furthermore it can be used for R&D, benchmarking tests, incoming control in converting.

If you would like to join the Working Group or review the final draft for this new proposal, please write to tip@tappi.org

Volunteers to chair the following working groups of Technical Information Papers (TIPs) are needed.
All Working Groups of TIPs require a minimum of 3 TAPPI members from 3 different companies in order to review a TIP. The following TIPs do not have an assigned Working Group Chair (WGC) to initiate the review:

The Standards listed below are ready for final approval at next SARG meeting on May 7, 2019.  

In order to act on any appeals from TAPPI members relevant to the standards up for approval, the SARG meeting is open to anyone for participation. The information for the SARG meeting is shown on Section "Announcement of SARG meeting". If you would like to review the draft, a copy with links to the documents up for approval has been posted on the SARG page**. Any comments or appeals should be sent to standards@tappi.org within 30 days of this notice. 

(* indicates Standards eligible for submission as American National Standards)

1. * T 230 Viscosity of pulp (capillary viscometer method)

2. * T 282 Hexeneuronic acid content of chemical pulp

3. * T 410 Grammage of paper and paperboard (weight per unit area)

4. * T 496 Specimen preparation for cross directional internal tearing resistance for paper, paperboard and related materials

5. * T 812 Ply separation of solid and corrugated fiberboard (wet)

** http://www.tappi.org/Get-Involved/Develop-Standards-Methods/Standards-Advisory-Review-Group/ 

The next meeting of the Standards Advisory Review Group (SARG) is scheduled for Tuesday, May 7, 2019 1:30 – 2:00 pm (EASTERN time), at the Indiana Convention Center, Indianapolis, IN, the site of the 2019 PaperCon. SARG approval is the last step prior to publication for any new or revised standard.

In order to act on any appeals from TAPPI members relevant to the standards up for approval, the SARG meeting is open to anyone for participation. The agenda has been posted on the SARG page*. There are links from the agenda items to the final drafts that are up for approval.

If you would like to participate by conference call, please send a message before April 19, 2019 to standards@tappi.org.

* http://www.tappi.org/Get-Involved/Develop-Standards-Methods/Standards-Advisory-Review-Group/