Biaxial stretcher is developed for thermoplastic polymer materials including PLA biodegradable film, PET polyester film, BOPP polypropylene film, BOPE polyethylene film and EVOH high-barrier film. It supports constrained uniaxial stretching, free uniaxial stretching, simultaneous biaxial stretching and sequential biaxial stretching.
Product Introduction
PLA, PET and BOPP Film Biaxial Stretcher is a self-developed laboratory-specific stretching instrument for polymer films by Guangzhou Potop. The complete system consists of clamping assembly, stretching assembly, stretching mechanism moving assembly, heating oven assembly, pneumatic air curtain assembly and electrical control system.
The equipment can stretch film specimens of fixed size at preset draw ratios under precisely controlled temperature and time conditions to carry out uniaxial or biaxial stretching tests. It collects full sets of test data in real time, providing reliable experimental support for formula development, film-forming process optimization and film performance research of various polymer materials such as PP, PE, PET, PLA, EVOH and PEEK. It is widely used in university laboratories, research institutes and R&D centers of new material enterprises.
Product Features
✅ Multiple Stretching Modes Available
Constrained uniaxial stretching, free uniaxial stretching, simultaneous biaxial stretching and sequential biaxial stretching are supported. It flexibly simulates diverse industrial film production processes. Corresponding stretching process solutions can be matched for biodegradable PLA films as well as BOPP and PET packaging films.
✅ Servo Drive for Excellent Test Repeatability
The stretching and moving mechanisms are driven by servo motors for stable control of tension, displacement and speed. Test results show high consistency under identical conditions, facilitating comparison of the effects of different formulas and processes on film properties.
✅ Independent Temperature Control for Dual Ovens with Energy Saving and Rapid Cooling
Equipped with two heating units: a stretching oven and a heat-setting oven. Adopting hot-air circulation design, it features a hot-air recycling energy-saving structure and rapid cooling function. Uniform temperature is maintained inside the oven, and the waiting time between batches is shortened to improve R&D and testing efficiency.
✅ Infrared Film Temperature Measurement for More Authentic Data
Different from conventional equipment that only monitors cavity air temperature, it is fitted with an infrared temperature measurement module to directly detect the actual temperature of film specimens. This eliminates the deviation between oven air temperature and real film temperature, making test data more consistent with actual forming conditions.
✅ Visual Observation & Complete Data Recording
Film deformation during stretching can be directly observed. The supporting industrial control system automatically saves stretching curves, temperature curves, operation logs and alarm records. Test data can be queried and exported at any time for research archiving, thesis writing and project documentation.
✅ Integrated Frame with Stable Pneumatic Clamping
The integrated machine frame features high rigidity and low operating vibration. Pneumatic chucks provide uniform clamping force to prevent film slippage during stretching. The compact layout enables easy sample loading, unloading and routine maintenance.
✅ Wide Material Compatibility for General and Advanced Special Materials
Common materials: PP, PE, PET, PLA, PBAT, EVOH, PA Nylon；High-performance special materials: ETFE, PVDF, PI, PTFE, PPS and other fluorine films, engineering films and new energy functional films.Stretching process research can be carried out on this equipment for ordinary packaging films, fully biodegradable films, high-barrier composite films, optical base films and high & low temperature resistant special films.
✅ Material schools and polymer labs for academic research, postgraduate experiments and teaching demonstration
✅ Formula development and process optimization of PLA, PBAT and BOPLA biodegradable films
✅ R&D of BOPP, BOPET, BOPE packaging films and food flexible packaging films
✅ Process research of EVOH high-barrier films and multi-layer co-extruded barrier films
✅ Development of ETFE, PVDF, PI, PTFE fluorine films and high-temperature engineering films
✅ Research on optical films, new energy functional films and lithium battery separator orientation
✅ Fundamental study on polymer orientation, crystallization behavior, mechanical, optical and barrier properties
✅ Pre-test for new processes, providing process reference for pilot and industrial biaxial lines
✅ Verification of modified resin, functional masterbatch and additive effects
Test Process Flow
Sample Preparation: Prepare uniform defect-free pre-cast film by Potop cast film machine or compression molder, cut into standard square specimens. Self-made pre-cast films are also acceptable.
Sample Loading & Clamping: Open oven curtain, place film specimen in the center of clamps, activate pneumatic clamping and confirm uniform force distribution.
Preheating & Soaking: Close the curtain, heat the oven to target temperature and keep constant until the specimen reaches proper stretching temperature.
Biaxial Stretching: The machine executes simultaneous or sequential stretching according to preset draw ratio, speed and sequence, and records tension and displacement in real time.
Heat Setting: After stretching, the film is held at setting temperature to release internal stress and stabilize oriented structure, simulating industrial setting procedure.
Cooling & Unloading: Finish setting, cool down the oven, open the curtain and take out the biaxially stretched film sample.
Performance Characterization: Test mechanical, optical and barrier properties by tensile tester, haze meter, OTR/WVTR tester; export test curves for further analysis.
| Model | FOCI-05 | ||
| Suitable materials | PLA、PET、BOPP、BOPE、EVOH | ||
| Specimen Thickness | 0.02–2 mm | ||
| Specimen Size | Min. 95 mm×95 mm; Max. 110 mm×110 mm | ||
| Maximum Stretch Ratio | 5:1 (for minimum-size specimen) | ||
| Stretching Speed | 0–300 mm/s, stepless adjustable | ||
|
Temperature Control Range |
Ambient temperature ~ 250 ℃ | ||
| Temperature Control Accuracy | ±2 ℃ (steady state) | ||
| Supported stretching modes | Uniaxial constrained stretching, uniaxial unconstrained stretching, simultaneous biaxial stretching, and sequential (asynchronous) biaxial stretching. | ||
|
L*W*H |
3700 mm × 1550 mm × 1800 mm |
