Comprehensive Material Quality Control Testing Solutions

FST-01 Film Shrinkage Tester

CELL INSTRUMENTS

FST-01 Film Shrinkage Tester

Features

  • Precise Temperature Control: Digital P.I.D. ensures fast and stable temperature without fluctuation.
  • Stable Heating: Fluid heating offers a consistent test environment
  • Accurate Timing: Auto timer ensures precise test results
  • User-Friendly Interface: LCD display with microcomputer and PVC panel.
  • Efficient Testing: Wire mesh clamp ensures smooth operation.
FST-01フィルムフリーシュリンケージテスター

Standard

 ASTM D2732 ,GB/T 13519

Applications

  • Industry

    		 Typical packaging materials Application
    Food and beverage PE, POF, OPS heat shrink film Mineral water bottles, beverage bottle labels, food packaging, heat-sealed bags
    Wine packaging PE, PVC, PETG heat shrink film Liquor bottle neck seal, anti-counterfeiting label, wine gift box shrink film
    Pharmaceutical and health care PVC, POF heat shrink film Medicine bottle sealing film, medical device outer packaging, medicine box anti-counterfeiting film
    Daily chemical and personal care OPS, PETG, PVC heat shrink film Shampoo bottle label, cosmetic outer film, skin care bottle shrink sleeve
    Industrial and electronic product packaging PET, POF, PVC shrink film Shrink packaging of small appliances, packaging of electronic parts and accessories, heat sealing of hardware tool assembly

Technical Specifications

Specifications FST-01 Film Shrinkage Tester
Specimen Size ≤100 mm x 100 mm
Temperature Range Room temperature ~ 200°C
Accuracy ±0.3°C
Power Supply AC 110~220V 50Hz
Heating medium Heated by water bath/Heated by oil bath

Principle

Step 1  Sample Preparation
  • Cut the plastic film into 100 mm × 100 mm squares
  • Draw central lines along the Machine Direction (MD) and Transverse Direction (TD)
Step 2  Initial Measurement
  • Measure the length of the marked lines
  • Record as Initial Length (L₀) in both MD and TD
Step 3  Thermal Treatment
  • Place the sample in a preheated medium (e.g., water or air) at the target temperature (e.g., 130°C)
  • Soaking time: 10 seconds, with the sample in an unrestrained condition
Step 4  Cooling
  • Remove the sample and allow it to cool naturally to room temperature
  • Ensure the sample lies flat without distortion
Step 5  Final Measurement
  • Measure the lengths of the lines again
  • Record as Final Length (L₁)

Step 6  Shrinkage Calculation

Use the formula：

Shrinkage (%) = (L0 – L1) / L0 × 100

thermal shrinkage tester

The Importance of Film Shrinkage Tester

Unrestrained Linear Thermal Shrinkage

Necessity of Testing

Conducting heat shrink testing is essential for ensuring product quality and performance reliability.

1.Core means of quality control

The heat shrinkage performance directly affects the dimensional stability and applicability of the material. The heat shrinkage test can monitor the changes of the material during the heating process and detect abnormalities in time.

2.Improve packaging adaptability and user experience

Whether the heat shrink film is tight and beautiful is related to the packaging quality and brand image. Testing can avoid problems such as wrinkles, warping, and breakage.

3.Meet standards compliance and market access

Heat shrink materials must comply with ASTM D2732, ISO 14616 and other standards. Heat shrink testing ensures that products meet technical requirements.

4.Promote innovation and material optimization

Thermal shrinkage test is an important means to evaluate the thermal stability of new materials, which is helpful for R&D and structural design.

Testing Advantages

  • Ensure product consistency
  • Discover defective materials
  • Support factory inspection and release
  • Improve packaging fit and damage resistance
  • Ensure transportation stability and appearance display
  • Enhance user satisfaction and brand trust
  • Avoid non-compliance risks
  • Meet third-party testing requirements
  • Support export and bidding

film heat shrink tester

Frequently asked questions

What is the main purpose of a shrinkage tester?

A shrinkage tester is used to measure the linear thermal shrinkage of plastic films and sheets when exposed to elevated temperatures. It helps assess the dimensional stability of packaging materials during heat sealing, steam sterilization, or shrink-wrapping processes. Common applications include food packaging, medical films, and industrial shrink films.

The most commonly used standard is ASTM D2732, which specifies the method for determining the unrestrained linear thermal shrinkage of plastic film and sheeting. Other related standards may include ISO 14616.

Shrinkage tests can use either a temperature-controlled water bath or a hot air oven as the heating medium. Water baths are ideal for precise and uniform heating, while air ovens are suitable for materials that cannot be exposed to water.

No. According to ASTM D2732, samples should remain unrestrained during the heating process, meaning no clamping or force should be applied. This allows the sample to shrink freely and reflects its natural thermal shrinkage behavior.

Comprehensive Material Quality Control Testing Solutions

Cell Instruments Advantages​

01

Professional manufacturer background

With many years of R&D and production experience, we focus on packaging, medicine, food, and electronics. We have a strong R&D team and modern manufacturing system to ensure leading product quality and technical level.

Film Shrinkage Tester ASTM D2732

02

Strong custom development capabilities

With deep technical accumulation, we provide tailor-made solutions, including function adjustment, software customization, and automation transformation, to flexibly respond to various testing needs and improve testing efficiency.

03

Complete after-sales service system

With a technical support and after-sales service network covering the national and overseas markets, we provide full-service services such as operation training and remote diagnosis to ensure that customers are worry-free and minimize downtime.

shrinking force tester

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