JIS K 7124-1

Plastic films used in packaging, industrial products, and protective materials must withstand accidental impacts during production, transportation, and storage. JIS K 7124-1 specifies a standardized method for determining the dart impact strength of film by using a tester d'impatto per dardi in caduta libera. This test enables manufacturers to quantify a film’s resistance to sudden impact, helping engineers optimize material selection, improve product quality, and ensure consistent performance.

For laboratories, quality engineers, and packaging manufacturers, JIS K 7124-1 provides a repeatable and internationally recognized procedure for evaluating impact resistance. Whether developing new film structures or verifying production consistency, this test supplies objective data for informed decision-making.

What Is JIS K 7124-1?

JIS K 7124-1 is the Japanese Industrial Standard that specifies the determination of impact resistance of plastic film and sheeting using the free-falling dart method. The method follows the staircase testing procedure, where successive specimens are tested with varying dart masses until the 50% failure point is statistically determined.

The standard is technically aligned with ISO 7765-1 and serves manufacturers producing plastic films for domestic and international markets.

The measured result represents the impact energy required to cause failure under controlled conditions, providing an excellent indicator of material toughness.

Why Is JIS K 7124-1 Important?

Impact resistance directly influences package reliability throughout the supply chain. Films with insufficient impact strength may puncture or tear during handling, leading to product damage, contamination, or customer complaints.

Testing according to JIS K 7124-1 offre numerosi vantaggi:

• Verifies product quality before shipment
• Optimizes film thickness without sacrificing performance
• Supports material comparison during R&D
• Evaluates supplier consistency
• Reduces packaging failures during transportation
• Improves production quality control

By establishing measurable performance targets, manufacturers can balance cost efficiency with product protection.

Principle of the Dart Impact Strength of Film Test

Il dart impact strength of film test simulates a sudden impact by allowing a hemispherical dart of specified dimensions to fall freely from a fixed height onto a clamped specimen.

Each specimen either:

• Fails (penetration or rupture)
• Passes (no failure)

The staircase method adjusts the dart mass after each result until sufficient data are collected. Statistical calculations then determine the dart weight corresponding to approximately 50% specimen failure.

This value may be expressed as:

Parametro	Descrizione
Dart Mass	Critical weight causing 50% failures (g)
Energia d'impatto	Equivalent impact energy (J)
Failure Rate	Statistical evaluation based on staircase method

These values provide reliable comparisons between materials and production batches.

How Is JIS K 7124-1 Performed?

Un tipico JIS K 7124-1 test follows these steps:

Preparazione del campione

Specimens are cut to dimensions larger than 150 mm × 150 mm and conditioned according to laboratory requirements.

Sample Mounting

The film is securely clamped using a pneumatic clamping system to eliminate wrinkles or uneven tension.

Test Method Selection

Operators choose Method A or Method B depending on the required testing range and product characteristics.

Dart Release

Il free-falling dart impact tester releases the dart electromagnetically, allowing gravity to generate a consistent impact.

Failure Evaluation

After impact, the operator records whether the specimen failed or remained intact.

Calcolo automatico

Modern instruments automatically calculate the 50% failure point after completion of the staircase sequence.

FDT-01 Free Falling Dart Impact Tester

Il FDT-01 Tester d'impatto per la caduta di dardi is designed for accurate testing according to JIS K 7124-1, ISO 7765-1, ASTM D1709, and GB/T 9639.1.

Intelligent Automation

The instrument incorporates:

• PLC industrial control system
• 7-inch color touchscreen interface
• Automatic staircase calculations
• Statistical result generation
• Gram and Joule display

Automation minimizes operator error and significantly reduces calculation time.

High-Precision Dart Release

Consistent impact conditions are achieved through:

• Electromagnetic dart suspension
• Stable release mechanism
• Accurate impact height
• Excellent repeatability

These features ensure reliable compliance with JIS K 7124-1.

Bloccaggio pneumatico del campione

Uniform specimen tension is maintained through pneumatic clamping, preventing distortion that could affect test accuracy.

Convenient Data Management

The tester supports:

• On-screen results
• Micro-printer output
• Optional computer software
• Digital report export
• Laboratory record management

Specifiche tecniche

Articolo	Specifiche
Metodo di prova	Method A / Method B (optional)
Campo di prova	Method A: 50–2000 g
	Method B: 300–2000 g
Diametro del dardo	Method A: 38 ±1 mm
	Method B: 50 ±1 mm
Altezza d'impatto	660 mm / 1500 mm
Risoluzione	0.1 g (0.1 J)
Sample Clamp	Pneumatico
Dimensione del campione	>150 ×150 mm
Air Supply	0,6 MPa
Potenza	AC110–220V, 50 Hz

Materials Suitable for JIS K 7124-1 Testing

Il dart impact strength of film test applies to numerous flexible materials, including:

• Polietilene (PE)
• Polipropilene (PP)
• Poliestere (PET)
• PVC films
• Barrier films
• Multi-layer laminated films
• Metallized films
• Plastic sheeting
• Composite flexible packaging
• Coated paper laminates

Typical specimen thickness is up to approximately 1 mm.

Industries That Benefit from JIS K 7124-1

Many industries rely on JIS K 7124-1 testing to verify packaging durability.

Imballaggio flessibile

Manufacturers evaluate pouch films, wrapping films, and shipping materials before production release.

Imballaggio per alimenti

Impact-resistant films help prevent package failure throughout transportation and retail distribution.

Imballaggio farmaceutico

Medical and pharmaceutical packaging requires dependable mechanical performance to maintain product integrity.

Prodotti di consumo

Protective packaging for electronics, cosmetics, and household products frequently undergoes impact testing.

Material Development

R&D departments compare resin formulations, additives, processing conditions, and multilayer structures using standardized impact data.

Comparison with Related Impact Test Standards

Standard	Metodo di prova	Primary Application
JIS K 7124-1	Staircase free-falling dart	Plastic film impact resistance
ASTM D1709	Free-falling dart	Pellicole di plastica
ISO 7765-1	Staircase dart method	Plastic films and sheeting
GB/T 9639.1	Free-falling dart	Chinese national equivalent

Because these standards are technically similar, laboratories serving international customers can often use one instrument for multiple testing requirements.

Advantages of Using the FDT-01

Compared with traditional manual impact testing, the FDT-01 offers several advantages:

• Fully compliant with JIS K 7124-1
• High testing repeatability
• Calcoli statistici automatici
• Fast touchscreen operation
• Bloccaggio pneumatico del campione
• Electromagnetic dart release
• Reduced operator workload
• Optional software for digital records
• Reliable quality control for production and R&D

These features help laboratories increase productivity while maintaining accurate and traceable test results.

Related Impact Testing Equipment

Different materials require different impact testing methods. Cell Instruments also provides:

Strumento	Primary Application
FBT-01 Tester d'impatto per sfere cadenti	Impact resistance of rigid plastics, sheets, and panels
PIT-01 Tester d'impatto a pendolo	Pendulum impact testing for plastics and engineering materials
PHS-01 IEC Electronic Products Impact Tester	Mechanical impact testing for electronic products
Charpy & Izod Impact Tester	Impact testing of rigid plastic specimens

Selecting the appropriate tester depends on material type, product geometry, and applicable testing standards.

Perché scegliere Cell Instruments?

Cell Instruments specializes in mechanical property testing equipment for packaging materials, medical devices, pharmaceuticals, plastics, paper, and flexible packaging industries.

Beyond standard laboratory instruments, we provide:

• Dispositivi di fissaggio personalizzati
• Sistemi di collaudo multistazione
• Soluzioni per i test automatizzati
• Application-specific engineering support
• International standards compliance
• Professional technical consultation

With extensive expertise in flexible packaging testing, we help laboratories establish reliable quality control procedures while meeting global testing standards.

Il FDT-01 Tester d'impatto per dardi cadenti misura il dart impact strength of film secondo JIS K 7124-1 using the free-falling dart staircase method. Designed for plastic films, laminates, barrier materials, and flexible packaging, it features PLC control, a touchscreen interface, pneumatic specimen clamping, electromagnetic dart release, and automatic statistical calculations. The instrument delivers accurate, repeatable impact resistance data for quality control, material development, supplier qualification, and standards compliance.