BGT-01 Internal Bond Tester

1. Introduction of BGT-01 Internal Bond Tester

BGT-01 Internal Bond Tester is used to measure the energy required to rapidly delaminate a test piece of paper or board. Rupture of the test piece in the “Z” or thickness direction is initiated by a pendulum having a defined mass, moving at a defined velocity. The test is suitable for both single- and multi-ply papers and boards, including coated sheets and those that are laminated with synthetic polymer films. It is particularly suitable for papers and boards that may be subjected to z-direction rapid impacts, impulses or shock loads during printing or conversion.

For the determination of the internal bond strength of paper and board. The Internal Bond Tester is used to determine the internal bond of paper and board. A pendulum strikes a prepared specimen which splits the sample under controlled conditions. The Internal Bond Tester complies with state-of-the-art technology and convinces with an easy-to-use touchscreen display, a fully automated pendulum return and the possibility of changing the various pendulums very easily.

BGT-01 Internal bond Tester has wide application in single and multi-layer paper and board, including coated paper and those with covered with synthetic polymer, board like case board, white board, grey board, ivory board etc. Explore our advanced internal bond tester, designed for precise internal bonding tests e internal bond strength tests. Our equipment ensures accurate measurement of internal bond strength, essential for evaluating the durability and integrity of materials in various applications.

2. Why testing internal bond strength?

Printing, converting and many product applications subject paper and paperboard to impulses, impacts and shock loads into or out of the plane of the sheet. These can cause structural failures such as surface picks, blistering or delaminations within the interior of the sheet.

The common denominators of these failures are

a) the high velocity of the impact loads
b) the short time period during which the material is stressed, frequently one to a few hundred milliseconds
c) the planar nature of the resultant sheet failure.

3. Principle of HST-01 Heat Seal Tester

A square test piece is adhered to a flat metal anvil by means of double-sided adhesive tape. An “L”-shaped aluminium platen with the same surface area as the test piece is then adhered to the upper surface of the test piece, again, using double-sided adhesive tape. The assembly is secured in position and a pendulum allowed to impact the upper inside surface of the platen, causing it to rotate about its outside corner, splitting the test piece in the “Z” or thickness direction.

The energy absorbed in rupturing the test piece is calculated.

Image of assembly

1 test piece
2 double-sided adhesive tape
3 aluminium platen
4 metal anvil

1 pendulum strike point and direction

4. Advantages of HST-01 Heat Seal Tester

Pendulum Automatic Release

Resolution: Data acquisition resolution of 0.001 lbf/in², equipped with a high-precision 5000-pulse encoder

Self-Calibration: Special 5-level calibration tool kit (additional accessory)

Unit Switching: Switchable between J/M2 and lbf/in²

Human-Machine Interface: 5.0-inch color touchscreen operation, real-time display of test data

Software: Optional computer connection software for document processing, A4 printing at the terminal

Printing Output: Modular integrated thermal printer

5. Specifications of HST-01 Heat Seal Tester

6. Standards

ISO 16260
Full name: Paper and board — Determination of internal bond strength (Scott type)

Content: International standard, which specifies the method of determining the internal bond strength of paper or paperboard by pendulum impact method using Scott type internal bond strength tester.

Scope of application: Applicable to paperboard and thicker paper, not applicable to thin paper.

TAPPI T 569
Full name: Internal bond strength of paperboard (z-direction)

Content: American Pulp and Paper Industry Association (TAPPI) standard, specifically measuring the internal bond strength of paperboard in the Z direction (perpendicular to the paper surface), using Scott Bond Tester or equivalent equipment to test the impact absorption energy.

Scope of application: Especially suitable for thick paperboards such as industrial packaging paperboard, gray board, white board, etc.

GB/T 26203
Full name: Paper and paperboard – Determination of internal bond strength (Scott method)

Content: Chinese national standard, equivalent or equivalent to ISO 16260, specifies the method of determining the internal bond strength of paper and paperboard using a Scott internal bond strength tester.

Scope of application: Applicable to all types of paper and paperboard.

QB/T 5558
Full name: Paper and paperboard – Determination of internal bond strength (Scott method)

Content: Chinese light industry standard, the method is basically consistent with GB/T 26203 and ISO 16260, but mainly serves the internal control and product quality grading needs of the domestic papermaking and packaging industry.

Scope of application: Applicable to paper, paperboard and special paper products.

7. FAQs of HST-01 Heat Seal Tester

What is internal bond strength？
Internal bond strength is the average potential energy, expressed as J/m 2 of surface, required to delaminate a test piece under the conditions of the test. The result is the difference of the potential energy before and the remaining energy after delaminating the test piece.

Whether you’re conducting internal bond tests for wood products, composite materials, or other substrates, our internal bond tester guarantees reliable results. If you have purchase needs, please contact us e Cell Instruments will give you satisfactory products.