Laboratory heat seal instrument is a kind of instrument used to test the heat seal strength and heat seal performance of plastic film, composite film and other materials. Its principle is based on the physical process and thermal principle of heat sealing.

How it works
The laboratory heat seal instrument usually consists of two heat heads, which can heat and press two films together to form a heat seal area. During the test, it is necessary to place the film sample to be tested in the heat seal area, adjust the temperature and pressure and other parameters, and carry out the heat seal test.

The process of heat sealing mainly includes heat conduction, melting and curing steps. When the heat head is heated to a certain temperature, the temperature on its surface is higher than the melting point of the film, and the film begins to melt. At the same time of melting, heat energy will transfer from the heat head to the film, so that the surrounding material will also begin to melt. When two melted films meet, they will form a certain heat seal area through heat energy transfer. After the heat seal is completed, the film will begin to cure and form a certain heat seal strength, which is used to test the heat seal performance.

Principle and operation steps of laboratory heat sealing apparatus

In the laboratory heat sealing instrument, the heat sealing process can be controlled by adjusting the heating temperature, pressure, time and other parameters, and the heat sealing strength and performance of the film can be tested. Through the heat seal test, the heat seal quality, reliability and durability of materials can be evaluated, providing technical support and reference for the application of materials.

Procedure of operation
The following are the basic operation steps of the laboratory heat sealing instrument:

Sample preparation: According to the test needs, prepare the film samples that meet the requirements, usually need to be cut, cut, cleaning and other processing, to ensure that the samples meet the standard requirements.

Adjust the test parameters: place the heat head on the test platform and adjust the test parameters such as temperature, pressure and time to meet the test requirements and standard requirements. When adjusting the parameters, it is necessary to refer to the test standard and instrument manual, and adjust according to the actual situation.

Place the sample: Place the prepared sample between the hot heads, position and place according to the standard requirements and test needs. When placing samples, it is necessary to pay attention to factors such as the number, location and density of samples to ensure the accuracy and reliability of test results.

Principle and operation steps of laboratory heat sealing apparatus

Perform the test: Press the test button and the instrument starts to perform the test automatically. In the test process, it is necessary to monitor the test data and instrument status, record and deal with the test results and abnormal conditions in time. As required, multiple tests can be performed to obtain more accurate test results.

Result analysis: At the end of the test, the results were analyzed and evaluated according to the test results and standard requirements to determine the heat sealing strength, heat sealing performance and appearance quality of the samples. When analyzing the results, it is necessary to refer to the test standards and technical requirements, and make the necessary comparisons and statistics.

Principle and operation steps of laboratory heat sealing apparatus

Data processing and reporting: According to the test results and analysis, process and summarize the test data, and prepare the test report. The test report should include test methods, test results, data analysis and conclusions to meet the actual needs and requirements.

In general, the operation steps of the laboratory heat sealing instrument need to follow the standardized test process and requirements to ensure the accuracy and reliability of the test results. When conducting the test, attention should be paid to the problems of sample preparation, test parameters, test process and data processing to ensure the scientific and reliable test results.