The heat shrinkable film is a thermoplastic film that is stretch oriented during production and shrinks during use. Therefore, no matter which printing method is adopted for printing, the horizontal and vertical shrinkage of the material and the allowable deformation error in each direction of the decorative graphic after shrinking must be taken into account before the design of the surface pattern, so as to ensure the pattern shrinking onto the container, The exact reduction of text and barcode.
1, the direction of the pattern
Regardless of whether the heat shrinkable film is gravure or flexographic printing, the printing is mainly printed in India, and it should be positive with respect to the direction of the pattern on the printing plate. Nowadays, there is also a printed shrink film. In this case, the pattern on the plate should be reversed.
2, the level of the pattern
Due to the disadvantages of flexographic printing, if the shrink film is flexo-printed, the image level should not be too fine, and gravure printing may require a richer image hierarchy.
3, the size of the design
The heat shrinkable film material used for printing has a transverse shrinkage of 50% to 52% and 60% to 62%, and in special cases it can reach 90%, and the longitudinal shrinkage requirement is 6% to 8%. However, when the film shrinks instantaneously, due to the limitation of the container, the horizontal and vertical directions cannot be completely contracted. In order to ensure accurate reduction of the printed pattern, text, and bar code, the shape of the container must be taken into consideration, and the correct size is calculated according to actual conditions. Deformation rate. For heat-shrinkable labels that need to convert the sheet-like film into a tube shape and use an adhesive to seal the overlapped parts together, care should be taken not to design graphics at the sealing area, so as not to affect the adhesion fastness.
4, bar code placement
Usually, the orientation of the bar code should be consistent with the direction of printing, otherwise it will cause the bar code lines to be distorted, which will affect the scanning results and cause misreading. In addition, the color selection of label products should be based on spot colors as much as possible, and the production of the white version is a must, and it can be made full or hollowed out according to the actual situation. The color of the bar code should follow the general requirements, that is, the color of the bar and the empty should match the bar code color matching principle. Printing material selection. The printing of heat shrink labels has been briefly analyzed above, affecting their quality. In addition to controlling the printing process, materials play a decisive role. Therefore, choosing the right material is the key. The thickness of the film material is determined according to the application field and cost of the heat shrink label, the characteristics of the film, the shrinkage property, the printing process, and the labeling process requirements. Generally, the film thickness of the shrink film label should be 30 μm-70 μm, and 50 μm, 45 μm, and 40 μm are more commonly used, depending on the labeling performance of the labeling device. For the selected label material, the shrinkage of the film material is generally required to be within the application range, and the transverse (TD) shrinkage is higher than the longitudinal (MD) shrinkage. The transverse shrinkage of commonly used materials is 50% to 52% and 60% to 62%, and in special cases it can reach 90%. The longitudinal shrinkage requirement is 6% to 8%. In addition, because the shrink film is very sensitive to heat, high temperatures must be avoided during storage, printing, and shipping.
1, the direction of the pattern
Regardless of whether the heat shrinkable film is gravure or flexographic printing, the printing is mainly printed in India, and it should be positive with respect to the direction of the pattern on the printing plate. Nowadays, there is also a printed shrink film. In this case, the pattern on the plate should be reversed.
2, the level of the pattern
Due to the disadvantages of flexographic printing, if the shrink film is flexo-printed, the image level should not be too fine, and gravure printing may require a richer image hierarchy.
3, the size of the design
The heat shrinkable film material used for printing has a transverse shrinkage of 50% to 52% and 60% to 62%, and in special cases it can reach 90%, and the longitudinal shrinkage requirement is 6% to 8%. However, when the film shrinks instantaneously, due to the limitation of the container, the horizontal and vertical directions cannot be completely contracted. In order to ensure accurate reduction of the printed pattern, text, and bar code, the shape of the container must be taken into consideration, and the correct size is calculated according to actual conditions. Deformation rate. For heat-shrinkable labels that need to convert the sheet-like film into a tube shape and use an adhesive to seal the overlapped parts together, care should be taken not to design graphics at the sealing area, so as not to affect the adhesion fastness.
4, bar code placement
Usually, the orientation of the bar code should be consistent with the direction of printing, otherwise it will cause the bar code lines to be distorted, which will affect the scanning results and cause misreading. In addition, the color selection of label products should be based on spot colors as much as possible, and the production of the white version is a must, and it can be made full or hollowed out according to the actual situation. The color of the bar code should follow the general requirements, that is, the color of the bar and the empty should match the bar code color matching principle. Printing material selection. The printing of heat shrink labels has been briefly analyzed above, affecting their quality. In addition to controlling the printing process, materials play a decisive role. Therefore, choosing the right material is the key. The thickness of the film material is determined according to the application field and cost of the heat shrink label, the characteristics of the film, the shrinkage property, the printing process, and the labeling process requirements. Generally, the film thickness of the shrink film label should be 30 μm-70 μm, and 50 μm, 45 μm, and 40 μm are more commonly used, depending on the labeling performance of the labeling device. For the selected label material, the shrinkage of the film material is generally required to be within the application range, and the transverse (TD) shrinkage is higher than the longitudinal (MD) shrinkage. The transverse shrinkage of commonly used materials is 50% to 52% and 60% to 62%, and in special cases it can reach 90%. The longitudinal shrinkage requirement is 6% to 8%. In addition, because the shrink film is very sensitive to heat, high temperatures must be avoided during storage, printing, and shipping.
We are manufacturer and supplier of Stainless Steel Honey Spoon Tea,Metal Honey Spoon,Teaspoon Honey,Spoon For Honey,Metal Honey Dipper. And we located in Jiangmen, Guangdong, China. If any interested, please contact us for free.
Honey Spoon Tea,Metal Honey Spoon,Teaspoon Honey,Spoon For Honey,Metal Honey Dipper
Jiangmen Xinhui Zhancha Metal Products Co,. Ltd. , https://www.zckitchenware.com