J&B HotTack Tester Model 4000

Automatic testing of Hot Tack Strength On heat sealable packaging materials

Hot Tack Tester

The Hot Tack Tester is a highly sophisticated instrument for testing sealing properties of packaging material. It is being used in research and development as well as in SQC/SPC applications for raw materials; semi finished goods and finished packaging products.

The Hot Tack Tester permits evaluation of sealability and hot tack under a broad range of testing conditions to optimize packaging machine settings and to ensure consistent quality of the product. The instrument is also a practicable and helpful tool to packaging material manufacturers and end-users for incoming material inspection and for obtaining optimal production line speed.

Hot Tack


Hot Tack is the strength of a heat-seal immediately after sealing, that is, before it has cooled down and reached its maximum strength. Conventional testing with a separate heat sealer and tensile tester seldom correlates with the strength of a hot seal as it is first exposed to stress on a packaging machine. The Hot Tack Tester has been designed for testing the heat seal strength under accurately controlled conditions.






Simulation of an automatic packaging machine


The Hot Tack Tester simulates heat sealing on an automatic packaging machine. It makes a hot seal and stresses it under pre-programmed conditions.

First the operator selects the desired parameter values in the Windows® software by using the keyboard and inserts the sample (fig.1). The testing sequence is activated and the lower sample clamp is moved to its upper position. The sample is automatically folded between the sealing bars with a special folding device (fig.2). The bars close (fig.3) and after the pre-set sealing time has elapsed, the sealing bars open and the heat seal is complete.

The selected cooling time elapses and the lower sample clamp moves down, peeling the seal (fig.4). During peeling, the force transducer attached to upper sample clamp measures the hot tack force. The signal from the transducer is transmitted to the computer to initiate data processing, displaying, reporting and storing of the testing data.







Fully adjustable sealing conditions


Computerized control of the existing parameters enables simulation of different packaging machines. An extensive adjustment range of parameter values enables testing of various materials used in different applications. The values of the following parameters are freely user-selectable:


Sealing Temperature
Sealing Time
Sealing Pressure
Cooling Time
Peeling Speed


Automatic sealing device


The sealing device is conveniently located in the front panel allowing easy use and access to the most frequently used components. The clamps are specially designed for easy attachment of the sample. The clamping plates are automatically activated and firmly hold the sample during the test. Vertical movement of the lower clamp is controlled by an electric motor that enables accurate positioning and speed. The fully automatic folding device provides perfect alignment of the sample and a fully operator-independent operation. The sealing bars are Teflon coated to prevent sample sticking. The sealing bars include integrated heating-elements and thermocouples to keep the selected sealing temperature constant regardless of the ambient temperature.




Sealing device parts

  1. Sample clamps
  2. Automatic sample folding device
  3. Sealing bars
  4. Seal force transducer


User-friendly operation

The software is Windows® designed using the latest tools available. It is easy to learn, easy to use and versatile. The software is mouse-operated and the functions are easy to activate. The parameter settings as well as the measuring results can be stored for future use. The software is compatible with commercially available SQC and spreadsheet software packages.The advanced software enables efficient use of the instrument by any person involved in testing, from a production machine operator to quality control and R&D personnel.

Excellent reporting capabilities


A color monitor and printer are used for reporting. Once a test is completed, a graph of hot tack force versus time is displayed. The hot tack force is calculated automatically as well. The operator can also activate summary graphs from a testing sequence including hot tack force versus selectable variables. The summary reports are especially useful when analyzing optimum seal settings for different materials.

The main window of the Hot Tack software with a Force graph, Results table, Correlation graph and Sample Queue

Advanced new features


  • Easily exchange of sealbars
  • The tester is totally maintenance free
  • The tester is prepared for Robotic operation
  • With an included calibration kit, the user is able to do traceable calibration himself

J&B HotTack32 Software new features


User Interface


32bits application

Graphical user interface

MDI interface for more control of screen layout

Save / Restore windows layout

Most Recently Used (MRU) list added to file menu




Create a new file based on an existing one

Add custom fields to setup

Ability to edit calibration values from within the program




Saves to a single file for a series of measurements
Only zero or one variable per file

Exclusion of measurements instead of deletion
Setup a queue of measurements before measuring

Re-arrange, add or delete measurements from queue during measuring
Automatic save of measurement queue items left to measurement file




Tabular view of measurements results
Add calculated results the tabular view

Waterfall display of multiple measurements
Reference graph for correlation graph

View included and/or excluded samples in correlation graph
Sorting of results in tabular view

Copy measurements and graphs to the clipboard
User definable columns in the tabular view




Export to Microsoft Excel®

Merge data into Microsoft word® template

Custom Export using javascripts

In / export from / to Hottack for Windows

Export to text

Print only selected items and save those layouts for later use

Print preview

Other Features


Contents of measurement files can be viewed from within program HTML Help File


  • Sealing bars: 2 NIPTEF®-coated, including sensors and heaters
  • Seal bars: 5 x 50 mm (» 0.2 x 2”)
  • Sealing operation: symmetrical, two sided
  • Sample width: max. 40 mm (1.6”)
  • Sample thickness: max. 1 mm (0.04”)
  • Sealing time: 0.1…20 s
  • Sealing temperature: 21ºC or ambient … 320ºC (608 ºF)
  • Sealing pressure: 0.1…2.0 N/mm²  (15…570 lb/inch)
  • Sealing pressure control: electronic PID control
  • Sealing pressure sensor: Strain gage
  • Sealing temperature control: electronic PID

Peeling specifications

  • Cooling time: 0.1…99 s
  • Peeling speed: 1…600 mm/s (0.04…25 inch/s)
  • Peeling by: vertically moving lower sample clamp
  • Peel control: electric servo motor
  • Sample length: min. 250 mm (9.8 inch)

Hot tack force measurements

  • Measurement range: 0…45 N (0…22 lb) auto scaling
  • Sampling speed: max. 20 kHz depending on peel speed
  • Number of samples: fixed 1000 per measurement
  • ADC Resolution:12 bits Sensor: Piëzo electric force transducer

Testing mechanics

  • Sample clamps: 2 automatic air activated clamps
  • Sample folding: automatic, servo motor-controlled
  • Optional full automatic measuring mode



  • Compatibility: Microsoft Windows® XP / Vista / 7 / 8
  • Mouse operated graphic user interface
  • Setting, storing and re-calling of test parameters
  • Storing, re-calling and reporting of measuring results


  • Measurement result: hot tack force versus time graph
  • Analysis: graphs from testing sequence versus variables
  • Numeric: reporting with data export capabilities

 Recommended PC

  • Microsoft Windows® PC
  • Inkjet or Laser printer
  • Serial port RS-232C or USB for interface to the instrument


  • Power: 85 to 132 VAC or 170 to 264 VAC Automatic switching / 50 - 60 Hz / 200 VA
  • Air supply: 6…8 bar (85…115 psi)



  • Weight: ca. 26 kg (60 lb)
  • Size (w x d x h): 444 x 297 x 740 mm (17.5 x 11.7 x 29.1 inch)


  • Specially designed to fulfill all ASTM* HotTack measuring requirements

All specifications subject to change without notice

*) ASTM F1921-98. Standard Test Methods for Hot Seal Strength (HotTack) of Thermoplastic Polymers and Blends Comprising the Sealing Surfaces of Flexible Webs.


Vived Management NV

A.G.Bellstraat 49

3620 Lanaken


Tel  +32 89 24 33 05