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Those in the field of thermal transfer printing have all experienced this: for the same transfer film, other companies can produce it with clear textures and stable adhesion. However, when using it on their own machines, either some parts will bubble and flake off, or the finished product will start to peel and fade after a period of use. Many people then feel that the quality of the film is poor. They have changed several suppliers, but the problem still keeps recurring.
Among the clients that Wuxin Technology has worked with, similar situations are not uncommon. Many people believe that the quality of the heat transfer printing effect is solely determined by the quality of the film， but they overlook many details in the process. From substrate treatment to machine operation， and even to model selection and matching， if any step is not done properly， it may lower the performance of the finished product. Today, Wuxin Technology will talk to you about several easily overlooked points in the heat transfer printing process.
Base material pre-treatment is a step that can be easily omitted.
Many processing factories rush to complete the production schedule. They directly start the transfer printing process once the base materials are received. They often skip the step of surface cleaning. However, during the production, transportation and storage of the base materials, the surfaces are inevitably contaminated with dust, oil stains or residual release agents. These invisible impurities will directly interfere with the adhesion between the ink and the base material. After the transfer printing, there are likely to be problems such as poor local adhesion and edge detachment.
The pre-treatment methods vary depending on the different types of substrates. For instance, PVC and wood-plastic commonly used in home building materials, as well as outdoor wall panels and automotive interior substrates, have distinct surface characteristics. When connecting with customers, Wuxin Technology will confirm the type of substrate and provide corresponding treatment suggestions to reduce the probability of transfer errors at the source.
The transfer parameters cannot be applied uniformly everywhere.
Many factories, in an effort to save time, use the same set of temperature and pressure parameters regardless of the product being transferred or the type of film being used. This is a common reason for the unstable transfer printing effect.
Different thicknesses of films, different materials of substrates, as well as flat decorative panels and special-shaped decorative lines, and products like slot machines' frames, all require different heat pressing conditions. If the parameters are too low, the ink transfer won't be sufficient and the adhesion won't keep up; if the parameters are too high, the film surface is prone to thermal deformation, resulting in wrinkling and pattern texture tearing. Even for the same type of film, when used on flat wall panels and narrow skirting lines, the applicable parameters also vary. Wuxin Technology provides suitable parameter reference ranges for different types of heat transfer films. Customers can make fine adjustments based on their equipment conditions, which is much more efficient than blind trial and error.
The storage and loading of membranes, details matter for the qualification rate
Many people do not take the storage of the film seriously, but often encounter problems in this regard. Especially during the rainy season in the south, if the transfer film is improperly stored and gets damp, after being transferred onto the machine, it is prone to watermarks and small bubbles, affecting the entire batch of products. In addition, the tension control during the transfer process and the alignment degree between the film and the substrate also affect the product effect.
For example, for long-shaped products such as skirting boards and decorative lines, if the tension of the film is not properly adjusted, during the transfer process, there is a high possibility of texture deviation and uneven thickness on both sides; for large-sized products like outdoor wall panels, if the alignment of the film is not accurate, the edges are prone to incomplete transfer. These details may seem insignificant, but they directly determine the qualification rate of the finished products.
In summary, if one only focuses on the quality of the film while neglecting the details of the manufacturing process, it is very likely that one will keep encountering problems repeatedly but fail to identify the root cause. Since Wuxin Technology has been producing heat transfer films for many years, it not only delivers the films to customers but also follows up on the subsequent process integration, helping customers troubleshoot and adjust the problems that arise during the process.
