The article is provided by Jinan Sanquan Zhongshi Experimental Instrument***.
In the field of materials science, polyethylene shrink film testers play an important role. The tester calculates the thermal shrinkage by accurately controlling the temperature of the heat-carrying oil in the heating tank, cutting the specimen to a certain size, placing it in the heating tank, removing the specimen after a set time, cooling it to room temperature, and measuring the size of the specimen. This process is essential to understand the heat shrink properties of materials such as polyethylene, providing strong data support for production, R&D and application.
1. The principle of polyethylene heat shrinkable film tester.
The polyethylene heat shrink film tester makes use of the principle of thermal expansion and cold contraction. When the polyethylene film specimen is heated, the intermolecular activity increases, causing the material to swell. When the material cools, the intermolecular activity decreases and the material shrinks. The tester evaluates the heat shrinkage properties of a material by controlling the heating temperature and time to simulate the environmental conditions that the material may encounter in actual use.
2. Experimental procedures of polyethylene heat shrinkable film tester.
Specimen cutting: Cut the polyethylene film to be tested to the specified size to ensure that the size and shape of the specimen meet the experimental requirements.
Heating Tank Temperature Control: Adjust the temperature of the heat carrier oil in the heating tank to reach the preset heating temperature. This step is key, as accurate temperature control directly affects the accuracy of experimental results.
Place the specimen in the heating tank: Place the cut specimen in the heating tank to ensure that the specimen is in full contact with the oil.
Set the heating time: Set the heating time according to the experimental requirements. This step is to ensure that the material is sufficiently heated and reaches a state of thermal expansion.
Removal of the specimen: At the end of the heating time, the specimen is quickly removed from the heating tank and placed on a dry flat surface to cool naturally.
Cooling and size measurement: After the sample has cooled to room temperature, use a measuring tool to measure its size and record the data.
Calculate the thermal shrinkage: According to the experimental data, the thermal shrinkage of the sample is calculated. This step is done by comparing the dimensional changes before and after heating.
3. The application value of polyethylene heat shrinkable film tester.
The application value of polyethylene heat shrinkable film tester is mainly reflected in the following aspects:
Quality control: Testing the heat shrink properties of materials under different temperature and time conditions helps to strictly control product quality in the production process.
R&D of new materials: In materials science research, testers provide researchers with the tools to evaluate the heat shrink properties of new materials, helping to screen out materials with superior properties.
Optimize the production process: Understanding the heat shrink properties of materials can help optimize the production process and improve the quality and stability of the product.
Expand the application field: Through in-depth research on the thermal shrinkage properties of materials, it is helpful to discover the application potential of polyethylene and other materials in more fields.
Safety performance evaluation: In some application scenarios, the heat shrinkage performance of a material is closely related to its safety performance. Through the evaluation of the tester, it helps to improve the safety performance of the product.