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 free falling dart impact tester. 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 ma kilka zalet:

• 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

The 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:

Parametr	Opis
Dart Mass	Critical weight causing 50% failures (g)
Impact Energy	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?

Typowy JIS K 7124-1 test follows these steps:

Przygotowanie próbki

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

The 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.

Obliczanie automatyczne

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

FDT-01 Free Falling Dart Impact Tester

The FDT-01 Tester udarności spadających rzutek 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.

Pneumatyczne mocowanie próbek

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

Specyfikacja techniczna

Pozycja	Specyfikacja
Metoda badania	Method A / Method B (optional)
Zakres testu	Method A: 50–2000 g
	Method B: 300–2000 g
Średnica lotki	Method A: 38 ±1 mm
	Method B: 50 ±1 mm
Wysokość uderzenia	660 mm / 1500 mm
Rozdzielczość	0.1 g (0.1 J)
Sample Clamp	Pneumatic
Rozmiar próbki	>150 ×150 mm
Air Supply	0,6 MPa
Moc	AC110–220V, 50 Hz

Materials Suitable for JIS K 7124-1 Testing

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

• Polyethylene (PE)
• Polypropylene (PP)
• Polyester (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.

Opakowania elastyczne

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

Opakowania do żywności

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

Opakowania farmaceutyczne

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

Consumer Products

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	Metoda badania	Primary Application
JIS K 7124-1	Staircase free-falling dart	Plastic film impact resistance
ASTM D1709	Free-falling dart	Folie z tworzyw sztucznych
ISO 7765-1	Staircase dart method	Folie i arkusze z tworzyw sztucznych
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
• Automatic statistical calculations
• Fast touchscreen operation
• Pneumatic specimen clamping
• 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:

Instrument	Primary Application
Tester uderzeń spadającej kuli FBT-01	Impact resistance of rigid plastics, sheets, and panels
PIT-01 Wahadłowy tester udarności	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.

Dlaczego warto wybrać 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:

• Customized fixtures
• Multi-station testing systems
• Automated testing solutions
• 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.

The FDT-01 Tester udarności spadających rzutek mierzy dart impact strength of film according to 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.