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Hydraulic Burst Tester | Cardboard Burst Strength Tester ISO 2759 - UnitedTest

Hydraulic Burst Tester | Cardboard Burst Strength Tester ISO 2759 - UnitedTest

Model: UT4016B; ISO 2759

UT4016B Paperboard Automatic Hydraulic Burst Tester, also widely known as a cardboard burst strength tester or Mullen burst tester, is a precision physical property testing instrument dedicated to measuring the bursting strength and burst index of paperboard, corrugated board, and solid fiberboard per packaging industry standards. As a core quality control device for the paper and packaging sector, this ISO 2759 burst tester applies controlled hydraulic pressure to a clamped test specimen via an elastic diaphragm until the material ruptures, recording the maximum pressure value as the official bursting strength result for quality validation.


Standard: ISO 2759 Board - Determination of bursting strength


General introduction

UT4016B Automatic Hydraulic Burst Tester | ISO 2759 Mullen Burst Test Machine for Paper & Corrugated Board | UnitedTest


UnitedTest designs and produces the UT4016B automatic hydraulic burst tester, also called cardboard burst strength tester or Mullen burst tester, fully compliant with ISO 2759 packaging board testing standards.

ISO 2759 Board – Determination of bursting strength governs this test method. Our precision instrument accurately tests bursting strength and burst index of paperboard, corrugated board and solid fiberboard. It delivers steady hydraulic pressure through an elastic diaphragm onto fixed samples until rupture, capturing peak pressure as the official burst strength reading.


This ISO 2759 certified burst tester serves as essential quality control equipment for paper mills, corrugated carton factories and packaging inspection labs worldwide to verify raw material and finished carton performance.


UnitedTest is a professional OEM & ODM manufacturer of ISO 2759 compliant hydraulic burst testers and cardboard burst strength testers, providing factory-calibrated, high-precision burst testing machines for packaging factories, paper mills, third-party testing laboratories, and quality inspection institutions worldwide.

Key Features

  • Main features
  • Test Principle
  • ISO 2759 Standard Core Compliance
  • Application
  • Keywords

1. The machine automatically stops and returns to its original position after the cardboard is crushed;

2. Fully automatic one-button operation;

3. Can store 40 sets of data at the same time;

4. Comes with a mini printer to print test results;

5. Equipped with an emergency stop button for safer operation;

6. Equipped with an air pressure gauge to monitor pressure anytime;

7. High-definition LCD display;

8. Replaces the traditional glycerin-water method with silicone oil, making the machine less prone to rust and extending its lifespan.


Working Principle of UnitedTest ISO 2759 Hydraulic Burst Tester

The UnitedTest ISO 2759 hydraulic burst tester (cardboard burst strength tester) adopts the classic Mullen hydraulic testing principle in full alignment with ISO 2759 mandatory technical requirements, ensuring fully standardized test results for paper and board materials:

1. Specimen Clamping: Place the cardboard sample on the standard 31.5±0.05mm inner diameter clamping ring; the pneumatic clamping system provides adjustable clamping force (≥690 kPa) to prevent sample slippage, eliminating test errors.

2. Hydraulic Pressure Loading: The precision servo pump delivers hydraulic fluid at a standardized constant flow rate to the rubber elastic diaphragm beneath the specimen.

3. Specimen Rupture: The diaphragm bulges upward with increasing hydraulic pressure until the cardboard sample bursts.

4. Data Recording & Output: The high-sensitivity pressure sensor instantly captures the maximum burst pressure, automatically calculating bursting strength (kPa) and burst index (kPa·m²/g), with data saved and exportable for quality reports.

ISO 2759:2014 (Board — Determination of Bursting Strength)

All UnitedTest hydraulic cardboard burst strength testers fully comply with the ISO 2759:2014 international standard – the global authoritative specification for board bursting strength testing. This standard defines the mandatory hydraulic pressure testing method for board materials, and all our ISO 2759 burst testers strictly follow the regulated test principle, specimen requirements, test procedure, pressure range, and result calculation rules.

Key ISO 2759:2014 Specifications:

• Applicable Materials: All solid fiberboard, corrugated board, and composite board materials

• Test Pressure Range: Standard coverage from 350 kPa to 5500 kPa; extended low range down to 250 kPa for composite material components

• Test Principle: Rigidly clamp the specimen over a circular elastic diaphragm, apply constant-rate hydraulic pressure to bulge the diaphragm, and record the maximum pressure at specimen rupture

• Core Application Boundary: ISO 2759 is dedicated to cardboard testing, while ISO 2758 applies to lightweight paper bursting tests

• Equivalent National Standards: Synchronized with GB/T 1539 (China), QB/T 1057, fully meeting global and regional certification requirements


ISO 2759 Board - Determination of bursting strength

GB/T 6545 Corrugated fibreboard--Determination of bursting strength

GB/T 1539 Board—Determination of bursting strength

GB/T 16717 Packing containers―Heavy duty corrugated boxes


ISO 3036 Board — Determination of puncture resistance using a pendulum device

GB/T 2679.7Board-Determination of puncture resistance


The UnitedTest ISO 2759 hydraulic burst tester (cardboard burst strength tester) is widely deployed for quality inspection requiring official ISO 2759 certification across global paper and packaging industries:

• Paper mills & pulp factories: Raw cardboard burst strength incoming inspection

• Corrugated box manufacturers: Finished carton board performance verification

• Packaging & logistics enterprises: Packaging material compressive and burst resistance quality control

• Third-party testing labs: ISO 2759 standard testing and certification services

• R&D institutions: New paperboard material performance research and formula optimization

Hydraulic Burst Tester, cardboard burst strength tester, Mullen burst tester, ISO 2759 Burst Tester, Paperboard Burst Testing Machine, UnitedTest Testing Machine Manufacturer, UnitedTest UT4016B burst tester, ISO 2759 hydraulic Mullen burst strength machine, corrugated cardboard burst index testing equipment, automatic hydraulic paperboard burst resistance tester, elastic diaphragm rupture burst test ISO 2759, solid fiberboard packaging QC burst analyzer


Main Technical Specification

Sensing MethodPressure Transducer
Saving ResultsWith print function, can print 10 sets of data and automatically calculate the average
DisplayHigh-definition LCD screen, digital A/D conversion rate 100 times/sec, high testing accuracy
Force Unitskgf/cm², Lb/in², KPa (with unit switching function)
Measurement Range250–5600 kPa
Resolution1 kPa
Measurement AccuracyIndicator error better than ±1% FS
Indicator Stability Better than ±1%
Oil Pressure FlowHigh-pressure type 170±10ml/min
Film Resistance10mm bulge, 170kPa~220kPa18mm bulge, 250kPa~350kPa
Clamp MaterialStainless steel
Clamping Force>690kPa (adjustable)
Upper Clamp Ring Hole Diameterφ(31.5±0.05)mm
Lower Clamp Ring Hole Diameterφ(31.5±0.05)mm
Upper Clamp Plate Diameter95mm
Lower Clamp Plate Diameter135mm
Hydraulic OilSilicone Oil
Dimensions500*500*560mm
Weight70KG
Power SupplySingle-phase AC 220V
Standard Accessories2 plastic films, 1 wrench, 10 calibration sheets, 1 bottle of silicone oil (for export no include), 1 roll of   printing paper, 1 rubber hammer
Air SourceCustomer   provides


Main Accessories

ItemQuantity
Frame1   set
plastic films2   pcs
wrench1   pc
calibration sheets10   pcs
Silicone oil (for export no include)1   bottle
printing paper1   pc
rubber hammer1   pc
Documents (Manual, packing list, certificate)
Hydraulic Burst Tester | Cardboard Burst Strength Tester ISO 2759 - UnitedTest


Standard

ISO 2759 Board bursting strength test

ISO 2759 Board — Determination of bursting strength. 

ISO 2759 defines a uniform hydraulic bursting test method to measure the maximum uniform pressure a solid or corrugated fibreboard can withstand before rupture, with results expressed in kilopascals (kPa).

ISO 2758 Paper bursting strength test

ISO 2758 Paper — Determination of bursting strength

ISO 2758 defines a uniform hydraulic burst test for thin single-layer paper, measuring the maximum uniform hydraulic pressure (kPa) a paper sheet withstands before rupture. It is strictly separated from ISO 2759 for thick solid/corrugated board due to distinct equipment geometry and test parameters.

EN 1719 Loop tack measurement for coated pressure-sensitive adhesives

EN 1719 specifies test method to quantify the loop tack of coated pressure-sensitive adhesives (PSAs)—a critical property for adhesives used in applications requiring rapid, low pressure, initial bonding (e.g., labels, tapes, disposable hygiene products). The standard aligns with European Committee for Standardization (CEN) requirements and is intended for quality control, research, and regulatory compliance in the adhesive and packaging industries. 

ASTM D4521 Coefficient of Static Friction of Corrugated and Solid Fiberboard

ASTM D4521 is specifically for corrugated fiberboard (corrugated cardboard) and solid fiberboard used in packaging. It measures only the static (starting) coefficient of friction — not kinetic/sliding COF.

ISO 3036 Pendulum Puncture Resistance Test of Board

ISO 3036 Board — Determination of puncture resistance using a pendulum device.

ISO 3036 is an impact test method to quantify the energy required to fully pierce paperboard and corrugated fibreboard via a swinging pendulum triangular pyramid probe, with test results expressed in joules (J).

ASTM D2210 Mullen Test for Leather Grain Stretching Crack & Extension

ASTM D2210 Standard Test Method for Grain Crack and Extension of Leather by the Mullen Test

ASTM D2210 quantifies two core leather mechanical properties: grain crack resistance (burst pressure when the leather surface cracks under biaxial stretching) and extension/stretch percentage (deformation before grain failure). This method exclusively applies to thin, finished light leathers: shoe uppers, garment leather, glove leather, furniture upholstery leather. It explicitly excludes wet blue chrome-tanned crust leather. 

Frequently Asked Questions

Q1: What is the difference between ISO 2758 and ISO 2759 burst tests?

ISO 2758 is for lightweight paper bursting testing, while ISO 2759 is dedicated to cardboard/board with a higher pressure range (350–5500 kPa), suitable for corrugated and solid fiberboard.


Q2: Is a hydraulic burst tester mandatory for ISO 2759 testing?

Yes. ISO 2759:2014 explicitly requires a hydraulic pressure loading system and elastic diaphragm test structure for valid board testing; pneumatic testing devices cannot replace a professional hydraulic burst tester to meet official ISO 2759 test principle requirements.


Q3: Can UnitedTest provide calibrated ISO 2759 test reports?

All UnitedTest ISO 2759 cardboard burst strength testers generate test data fully traceable to ISO 2759 standards, and we can provide official factory calibration certificates compatible with global third-party laboratory audits and quality system certification.

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Beijing United Test Co., Ltd.