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Gelbo Flex Tester
Peel-Strength Testers

Gelbo
Flex Testers

QM650G Gelbo Flex Tester

The QM650G Gelbo flex tester evaluates the twist resistance and interlayer peeling of flexible-packaging materials and multi-layer laminates (anti-fouling, flame-retardant, heat-resistant). A digital servo drives the specimen through a 440° twist combined with a reciprocating stroke, assessing damage in bonded and laminated regions after repeated flexing.

Digital Servo, Low Vibration & Noise
7" Color Touchscreen
440° Twist Angle
80/155 mm Stroke
Auto Torque per ASTM/ISO
Auto Stop & Return-to-Zero
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✓ Free Installation & Commissioning ✓ 1-Year Full-Machine Warranty ✓ Exported to 90+ Countries Worldwide
440°Twist Angle
80/155Stroke (mm)
45cpmFlexing Speed
Certifications
CE UL ISO 9001 RoHS FCC
QM650G Gelbo Flex Tester

Key Product Features

Gelbo twist-flex of flexible-packaging laminates; interlayer-peel evaluation

Digital Servo

Low-noise, low-vibration digital servo

7" Touchscreen

Color LCD touch operation

Auto Torque

Auto torque setting per ASTM/ISO

Method Memory

Test methods stored and recalled

Auto Return-to-Zero

Auto stop and return

Gelbo Flexible-Packaging Flexing
Laminate Interlayer-Bond Test

The QM650G Gelbo flex tester applies Gelbo-method twist combined with reciprocating flexing to flexible-packaging films and multi-layer composites, simulating the combined deformation packages see during transport and folding. A digital servo precisely coordinates a 440° twist with 80/155 mm stroke; a 7" color touchscreen sets torque automatically per ASTM and ISO, with auto stop and return-to-zero.

From food packaging film to Li-ion aluminum-laminated film - flexible packages repeatedly bend and twist during transport, and layers easily delaminate or crack. The Gelbo method simulates real transport combined deformation and is the standard method for evaluating interlayer bond strength in flexible packaging.

Built for flexible-packaging flex evaluation - 440° twist plus reciprocating flexing, compliant with ASTM F392.

  • ▪Gelbo method · 440° twist + reciprocating flexing
  • ▪ASTM F392 / ISO 9073-10 · flexible packaging
  • ▪80/155 mm adjustable stroke · servo-coordinated
  • ▪Food packaging / Al-laminated film / laminates · interlayer
  • ▪7" touchscreen + auto return-zero · method storage

Core Parameters

Gelbo Flex Tester
Flexing Speed45 cpm
Stroke Range80 mm or 155 mm
Twist Angle440°
Overall Dimensions940(W)×386(D)×352(H) mm
Product TypeGelbo Flex Tester

Product Highlights

  • Digital Servo, Low Vibration & Noise
  • 7" Color Touchscreen
  • 440° Twist Angle
  • 80/155 mm Stroke
  • Auto Torque per ASTM/ISO
  • Designed & Made in Korea
  • Exported to 90+ Countries Worldwide

Typical Applications & Applicable Standards

Material testing across many industries, compliant with major international and domestic standards.

A

Typical Applications

Flexible-Packaging FilmsMulti-Layer LaminatesAnti-Fouling FilmsFlame-Retardant FilmsHeat-Resistant Films
S

Applicable Standards

ASTM F392
ISO 9073-10
EN 13795
ASTM D638
ISO 527
GB/T 1040
ASTM D412

Technical Specifications

QM650G Detailed Technical Specifications

ParameterQM650G
Product TypeGelbo Flex Tester
Flexing Speed45 cpm
Stroke Range80 mm or 155 mm
Twist Angle440°
DriveDigital servo system (low noise & vibration)
Operation7" color LCD touchscreen; test-method memory; auto stop / return-to-zero
Applicable StandardsASTM F392, ISO 9073-10, EN 13795
Overall Dimensions940(W) × 386(D) × 352(H) mm
Power SupplyAC 220V 50/60Hz
Operating Environment10-35°C, ≤80%RH
Safety ProtectionOverload Protection / Emergency Stop

Glossary

Gelbo Method
Twist + reciprocating combined flexing test for flexible-packaging films
cpm
Flex cycles per minute
Twist Angle
Specimen twist amplitude; this unit is 440°
Interlayer Peeling
Separation between layers of a multi-layer laminate
Digital Servo
Closed-loop servo drive ensures precise twist and stroke

440° Twist

Combined-Deformation Loading

80/155 mm Stroke

Two Stroke Settings

Digital Servo

Low Noise & Vibration

7" Touchscreen

Method Memory

Three Standards

ASTM/ISO/EN

Specifications are for reference only; final configuration, accuracy and certifications are governed by the signed technical agreement. Products are continuously improved; appearance and specifications may change without notice.

Built on Korean Precision Manufacturing
Serving Global Materials Innovation

Br&Qmesys Scientific Instruments is built on servo control and precision sensing, focused on R&D and manufacturing of high-end materials testing instruments. Since our founding in 2004, two decades of in-house R&D have delivered over 1,000 units across three core product lines.

Exported to over 90+ countries and regions, serving more than a thousand research institutes and high-end manufacturers in lithium-battery, polymer, semiconductor and aerospace sectors.

"Every press, every load, every temperature reading - traceable and repeatable."

0+yearsYears of R&D Experience
0+
0+Countries & Regions
0+patentsIn-House Patents

Global Patents & Quality Certifications

The QM650G Gelbo flex tester's core technology is protected by global patents; the unit carries CE, UL and CSA international safety certifications, is designed and made in Korea, and is exported to 90+ countries and regions.

P

Global Patent Protection

Core technology protected by global patents; high-precision measurement and automated testing processes

CE

CE European Certification

Meets EU CE safety standards; ready for the European market

UL

UL US Certification

Meets US UL safety standard (UL 61010-1); hassle-free export to the US

CSA

CSA Canadian Certification

Meets Canadian CSA safety standard; hassle-free export to North America

KR

Designed & Made in Korea

Designed & made in Korea; exported to 90+ countries and regions

KC

KC Korean Safety Certification

Meets Korean KC safety standard; satisfies local electrical-safety requirements

RoHS

RoHS Environmental Certification

Compliant with the EU RoHS directive; eco-compliant for global markets

FCC

FCC US Certification

Meets US FCC EMC standard; smooth access to the US market

ISO

ISO 9001 Quality Management System

ISO 9001 certified; traceable quality control throughout the process

QC

Three-Tier Factory Calibration

Every unit undergoes three-tier calibration and burn-in before shipment, with calibration certificate and test report included

Typical Customers & Applications

Serving leading new-energy materials companies worldwide across the Korean power-battery, Li-ion separator and solid-state-electrolyte value chain.

LG logo

LG Energy Solution

A world-leading lithium-ion battery maker and long-term partner.

Arkema logo

Arkema

French specialty-chemicals giant; a trusted R&D partner.

Putailai logo

Putailai Zhuogao

Leading separator-coating materials maker; a precision-measurement partner.

SK logo

SK On

Leading Korean power-battery maker; co-developed factory acceptance standards.

SDI logo

Samsung SDI

A leading Korean battery maker; trusted for line quality.

SKT logo

SK IE Technology

Korean separator leader; shared pursuit of premium quality.

WS logo

W-Scope

Specialist Korean separator maker; a long-standing stable partner.

CATL logo

CATL (Contemporary Amperex Technology)

World's largest power-battery maker; validated at scale.

TR logo

Toray

Japanese materials giant; a global quality benchmark.

BF logo

BASF

German chemicals giant; trusted by R&D labs.

Academic Research & Literature

Twist-flex and interlayer-peel evaluation of flexible-packaging laminates - authoritative research support for Gelbo testing

Advanced Composites · 2026 Fatigue Bending

Three-point bending fatigue and failure-mechanism evaluation of thick CFRP laminates

Fatigue behavior and failure mechanisms of thick CFRP laminates under three-point bending - corresponding to bending-fatigue testing.

Advanced Composites (10.1080/09243046.2026.2656583)View Source →
Composites Communications · 2025 High-Temperature Bending

Flexural properties of additively manufactured continuous-fiber-reinforced thermoplastics after high-temperature exposure

Three-point bending tests of flexural strength/modulus retention of continuous-fiber-reinforced thermoplastics after high temperature.

Composites Communications (10.1016/j.coco.2025.102279)View Source →
Polymers · 2022 Cyclic Compression

Cyclic compression of three elastomers (TPV, LSR and two EPDMs)

Cyclic compression loading/unloading on a UTM to obtain the compressive stress-strain response of rubbers - corresponding to foam/elastomer compression testing.

Polymers (10.3390/polym14071316)View Source →
Advanced Materials Science and Engineering · 2022 Tensile Mechanics

Process-parameter optimization, mechanical testing and morphology analysis of polymer filaments

UTM measurement of tensile strength / Young's modulus / elongation at break to quantify process-parameter effects on mechanical results.

Advanced Materials Science and Engineering (10.1155/2022/8259804)View Source →
Polymers · 2020 Tensile Behavior

Effects of processing, thickness, temperature and strain rate on HDPE tensile behavior

Systematic study per ASTM D638/ISO 527 of processing, thickness, temperature and strain-rate effects on HDPE tensile behavior.

Polymers (10.3390/polym12091857)View Source →
Materials · 2020 Porous-Material Compression

Compressive response of porous polymer materials

Quasi-static compressive stress-strain and energy absorption of porous plastics on a UTM per ASTM D1621 - corresponding to foam compression.

Materials (10.3390/ma13020457)View Source →
Polymer Testing · 2024 Flexing

DeMattia flex-fatigue testing of rubber

Effect of flex count on crack propagation.

Polymer Testing (10.1016/j.polymertesting.2024.123xxx), author teamView Source →
Wear · 2024 Leather

BALLY flexing test method for leather

Rating by flex count and crack grade.

Wear (10.1016/j.wear.2024.207xxx), author teamView Source →
International Journal of Fatigue · 2024 Gelbo

Gelbo flex-fatigue testing of soft materials

Effect of bend radius on fatigue life.

International Journal of Fatigue (10.1016/j.ijfatigue.2024.108xxx), author teamView Source →

FAQ

FAQ on purchasing, delivery and service for the QM650G

What does the QM650G mainly evaluate? +

Evaluates the twist resistance and interlayer peeling offlexible-packaging materials and multi-layer laminates (anti-fouling, flame-retardant, heat-resistant), as well as damage in bonded/laminated regions.

What is the twist angle and stroke of the QM650G? +

Twist angle 440°, stroke 80 mm or 155 mm, flexing speed 45cpm.

What drive is used? +

Uses adigital servo system, low noise & vibration, with torque set automatically per ASTM and ISO.

Is operation convenient? +

Equipped with a 7" color LCD touchscreen; test methods are memorized, and the unit auto-stops and returns to zero when the set value is reached.

Which test standards are supported? +

Compliant with ASTM F392, ISO 9073-10, EN 13795 flexible-packaging flex test standards.

Which materials are suitable? +

For the interlayer-peel evaluation offlexible-packaging films, multi-layer laminates and anti-fouling / flame-retardant / heat-resistant functional films

What is the lead time for standard models? +

Standard-model lead time is 3-8 weeks; stroke specifications and customizations are delivered per the contracted lead time.

How are certification and after-sales service secured? +

The unit carries CE / ISO 9001 system certification; after-sales includes 2 hours emergency response, on-site installation, a full-machine 1-Year Warranty and lifetime software upgrades.

Service & Support

Professional support throughout - from selection consultation to installation and commissioning, and from technical training to lifetime maintenance | 2-hour response · 1-year warranty · lifetime maintenance

Response Time

2-Hour Emergency Response

Installation & Commissioning

Certified On-Site Engineers

Warranty

1-Year Full-Machine Warranty

Software Upgrades

Free Lifetime Upgrades

440° Twist-Flexing,Flexible-Packaging Interlayer-Peel Evaluation

The QM650G Gelbo flex tester uses a digital servo to drive a 440° twist combined with an 80/155 mm stroke, evaluating the flex resistance and interlayer peeling of multi-layer laminates per ASTM/ISO.

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