What are the quality control links in the process of producing PET dumb silver thermal label paper?

In the process of producing PET matte silver thermal label paper, quality control is the key link to ensure the final quality of the product. The following are some of the main quality control steps:

1. Raw material selection and control

PET film selection: Select high-quality PET film as the substrate to ensure that it has good physical properties and chemical stability. PET film should be able to withstand a certain temperature, humidity changes, and have a certain corrosion resistance and wear resistance.

Thermal coating material: The choice of thermal coating material is equally important, which directly affects the printing effect and durability of the label paper. Environmentally friendly, non-toxic and stable thermal coating materials should be selected.

2. Surface pretreatment

Surface tension enhancement: PET films require surface pretreatment before printing to enhance their surface kinetic energy or wetting ability, thereby enhancing the adhesion of the ink. Common treatment methods include corona discharge and chemical treatment. It should be noted that the effect of corona discharge treatment can be unstable, so more manufacturers tend to use chemical treatment agents, such as corona free PET film surface treatment agents.

Cleanliness check: Ensure that the surface of the treated PET film is clean and free of impurities, so as not to affect the printing effect.

3. Printing process control

Ink selection and allocation: Select a special ink that matches the PET film, and perform predictive analysis and trial printing according to the actual production process to ensure that the printing effect meets the expectations.

Printing speed and pressure: Control the printing speed and pressure to avoid a decline in printing quality caused by too fast or too slow. At the same time, ensure that the printing pressure is uniform to avoid problems such as color difference or pattern blur.

Drying control: Control the drying temperature and time to ensure that the ink is completely dry and avoid the problem of dry and opaque in the overprint position.

4. Finished product inspection

Appearance Check: Check whether the surface of the label is smooth, smooth, and free of impurities, stains, or scratches. At the same time, check whether the size and shape of the label meet the design requirements.

Performance test: Perform temperature resistance, light resistance, corrosion resistance, wear resistance and other performance tests to ensure that the label paper can maintain stable performance in harsh environments.

Printing effect evaluation: Use a thermal printer for actual printing tests to evaluate whether the printing density, clarity and durability of the label paper meet the requirements.

5. Continuous improvement and feedback

Establish a feedback mechanism: Establish an effective feedback mechanism in the production process, collect and analyze production data, customer feedback and other information in a timely manner, in order to continuously improve and optimize the production process.

Staff training: Regularly carry out skills training and quality awareness education for production employees, improve their professional quality and work responsibility, and ensure that the quality control of each link can be effectively implemented.

In summary, the quality control process of the production of PET matte silver thermal label paper involves many aspects such as raw material selection and control, surface pretreatment, printing process control, finished product inspection and continuous improvement and feedback. By strictly implementing these control links, we can ensure that the PET dumb silver thermal label paper produced has excellent quality and stable performance.