English
In the field of product packaging, Packaging Stickers play a vital role. They are not only the carrier of product information, but also an important window for brand image display. For many companies that need to paste stickers on curved objects, how to ensure that Packaging Stickers do not produce bubbles or wrinkles after pasting on the curved surface is a key issue that needs to be solved urgently. As a professional Packaging Stickers Manufacturer, JinXin has rich experience and professional technology. The following will introduce the relevant points in detail.
Understand the difficulties of pasting on curved surfaces
Curved surfaces are essentially different from flat surfaces. Their irregular surfaces make it much more difficult to paste stickers. When stickers are pasted on curved surfaces, due to the change in the curvature of the curved surface, the tension on different parts of the stickers is uneven. This uneven tension can easily cause the stickers to be stretched inconsistently during the pasting process, resulting in bubbles or wrinkles. For example, when pasting stickers on cylindrical containers, the edges and middle parts of the stickers experience different degrees of stretching when pasting. The edge part needs a larger stretch to adapt to the curvature of the curved surface, while the middle part is relatively less stretched, which can easily cause bubbles and wrinkles.
In addition, the surface material of the curved surface will also affect the pasting effect of the sticker. Different materials, such as plastic, glass, metal, etc., have different surface smoothness, roughness and chemical properties. If the compatibility between the sticker and the curved surface material is not good, it may cause the pasting to be not firm, and increase the probability of bubbles and wrinkles. For example, when pasting stickers on some plastic curved surfaces with relatively rough surfaces, the stickers are difficult to completely fit the rough surface, and the air is easily trapped between the stickers and the curved surface, forming bubbles.
Choose the right Packaging Stickers
Material characteristics
Flexibility: Sticker materials with good flexibility can better adapt to the curvature changes of the curved surface. For example, stickers made of PVC (polyvinyl chloride) have high flexibility. It can be stretched to a certain extent without breaking easily, and can better fit various curved surfaces. When pasting on some curved surfaces with more complex shapes, stickers made of PVC can adjust the shape through their own flexibility to reduce the generation of bubbles and wrinkles.
Ductility: Stickers with appropriate ductility can evenly disperse tension when pasted on curved surfaces. For example, stickers made of PET (polyethylene terephthalate) have a certain degree of ductility while ensuring a certain strength. When a PET sticker is pasted on a cylindrical container, it can be moderately extended along the curved surface of the container, so that each part of the sticker is evenly stressed, thereby reducing the possibility of bubbles and wrinkles.
Glue performance
Viscosity and fit: High-quality glue can provide sufficient viscosity to ensure that the sticker fits tightly to the curved surface. At the same time, the viscosity of the glue should also have a certain adaptability, and can play a good pasting effect on different curved surface materials. As a professional Packaging Stickers Manufacturer, JinXin strictly controls the research and development and selection of glue. The glue used can achieve firm pasting on a variety of curved surface materials, reducing the problem of bubbles and wrinkles caused by loose pasting.
Initial viscosity and final viscosity: Initial viscosity refers to the adhesive ability of the glue when the sticker just touches the curved surface, and the final viscosity refers to the adhesive strength of the glue after a certain period of time. The ideal glue should have high initial tack, which allows the sticker to be quickly attached to the curved surface and prevents bubbles or wrinkles from being generated due to position shifting during the pasting process. At the same time, the final tack should be strong enough to ensure that the sticker is firmly attached to the curved surface for a long time. The glue used in the Packaging Stickers produced by JinXin has been carefully formulated and performs well in both initial tack and final tack, providing a strong guarantee for the perfect pasting of stickers on curved surfaces.
Optimize the pasting process
Cleaning the curved surface
Remove impurities: Before pasting the sticker, you must ensure that the curved surface is clean and tidy, without dust, oil, moisture and other impurities. These impurities will affect the fit between the sticker and the curved surface, and easily cause bubbles and wrinkles. You can use a special cleaner and a clean wipe to clean the curved surface, and make sure the surface is completely dry before pasting the sticker. For example, when pasting stickers on a glass curved surface, first wipe with alcohol to remove oil and dust, and then wipe dry with a clean paper towel, which can greatly improve the pasting quality of the sticker.
Surface treatment: For some special material surfaces, appropriate surface treatment may be required to enhance the adhesion of the sticker. For example, on metal curved surfaces, the surface roughness can be increased by grinding, sandblasting, etc., and the friction between the sticker and the metal surface can be increased, so that the sticker can be pasted more firmly and reduce the appearance of bubbles and wrinkles.
Correct pasting method
Gradually fit: Starting from one end of the curved surface, slowly fit the sticker to the curved surface, while gently pressing from one end of the fit to the other end with a scraper or finger to squeeze out the air between the sticker and the curved surface. In this process, pay attention to maintaining uniform pressure to avoid local stretching or wrinkles on the sticker. For example, when pasting a sticker on a conical container, start from the bottom of the cone, and then gradually fit upward along the generatrix of the cone, while gently pressing with a scraper to ensure that the air is completely exhausted.
Avoid excessive stretching: During the pasting process, pay attention to controlling the degree of stretching of the sticker to avoid deformation or cracking of the sticker due to excessive stretching. If the sticker needs to be stretched during pasting, it should be stretched as evenly as possible to make the tension of each part of the sticker consistent. When operating, JinXin's professional technicians will reasonably adjust the stretching force during pasting according to the shape of the curved surface and the material of the sticker to ensure that the sticker is flat and free of bubbles and wrinkles after pasting on the curved surface.
Use professional tools and equipment
Pasting auxiliary tools
Scraper: The scraper is a commonly used auxiliary tool in the process of pasting stickers. It can help squeeze out the air between the sticker and the curved surface, so that the sticker fits the curved surface better. It is very important to choose the right scraper material and shape. Generally speaking, the rubber scraper has good flexibility and can effectively squeeze out the air without damaging the sticker and the curved surface. When using the scraper, pay attention to moderate force and scrape evenly from the center to the edge of the sticker to ensure that the air is completely discharged.
Roller: The roller can provide uniform pressure when pasting stickers, so that the sticker fits the curved surface better. Especially when pasting stickers on a large area of curved surface, the role of the roller is more obvious. By rolling the roller, the air between the sticker and the curved surface can be squeezed out evenly, reducing the generation of bubbles and wrinkles. In the production process, JinXin will select the appropriate roller for auxiliary pasting according to different curved surface shapes and sticker sizes to improve the pasting quality.
Automated pasting equipment
Precise positioning: Automated pasting equipment can accurately position curved objects through advanced visual recognition systems to ensure that stickers are pasted in the correct position. At the same time, the automated equipment can also automatically adjust the sticker pasting angle and strength according to the shape and size of the curved surface, greatly improving the accuracy and consistency of pasting. For example, in the curved surface pasting of automotive parts, the automated pasting equipment can accurately paste the sticker to the specified position according to the complex curved surface shape of the parts, avoiding the position deviation and bubble wrinkle problems that may occur in manual pasting.
Efficient production: For large-scale production companies, automated pasting equipment can not only improve the pasting quality, but also greatly improve production efficiency. Automated equipment can work continuously and uninterruptedly, and can complete a large number of sticker pasting tasks per hour to meet the production needs of the company. As a professional Packaging Stickers Manufacturer, JinXin has advanced automated pasting equipment and can provide customers with efficient and high-quality label customization services.
Quality Inspection and Feedback
Real-time Inspection
Appearance inspection: After the sticker is pasted, it is necessary to conduct an appearance inspection in time to check whether there are bubbles, wrinkles, loose adhesion and other problems. Preliminary inspection can be carried out by naked eye observation and touch. For some subtle bubbles and wrinkles, you can use tools such as a magnifying glass to check. If problems are found, the causes should be analyzed in time and corresponding measures should be taken to improve them.
Performance test: In addition to the appearance inspection, the pasting performance of the sticker needs to be tested. For example, the adhesion, water resistance and weather resistance of the sticker on the curved surface can be tested. The sticker can be tested accordingly by simulating the actual use environment to ensure that the sticker can maintain a good pasting effect under various conditions. During the production process, JinXin will conduct strict performance tests on each batch of Packaging Stickers. Only products that pass the test can be shipped to ensure that the quality of the products received by customers is qualified.
Customer feedback
Collect opinions: Actively collect feedback from customers and understand the problems and needs encountered by customers during use. The actual use experience of customers is an important basis for improving products and services. Through communication and exchanges with customers, some problems that may be overlooked in the production process can be discovered. For example, customers may report that stickers have bubbles or wrinkles on certain special curved shapes or usage environments. Based on these feedbacks, JinXin can make targeted improvements and optimizations.
Continuous improvement: Based on customer feedback and quality inspection results, we continuously improve production processes and product quality. As a professional Packaging Stickers Manufacturer, JinXin always puts customer needs first and continuously invests in R&D and technological improvements to provide better quality Packaging Stickers and more complete services. Through continuous improvement, we can better meet customers' requirements for the effect of stickers on curved surfaces and improve customer satisfaction.
To ensure that Packaging Stickers do not produce bubbles or wrinkles after being pasted on curved surfaces, we need to start from multiple aspects. As a professional Packaging Stickers Manufacturer, JinXin can provide customers with a full range of solutions with its professional technology, high-quality products and perfect services to help customers solve various problems encountered in the process of sticker pasting. Whether in material selection, pasting process optimization, or with the help of professional tools and equipment, quality inspection and feedback, JinXin has rich experience and excellent performance, and is your trustworthy partner.
