Shrink film labels, from material to finished product, you want to know all in here

Concept and advantage of shrinkable film set of tags is a plastic film or plastic printing film suits on label. It has the following characteristics: 1, shrink film set of label processing is convenient, the packing sealing, pollution prevention, for good protection; 2, membrane set against goods, packing compact, and can show product modelling, and thus is applicable to package of irregular goods; 3, shrink film set of tag labeling, do not need to use glue, and can obtain the same as the glass transparency; 4, shrink film set of tags to packaging container with 360 & deg; The omni-directional decoration, and product description such as commodity information can be printed on the label, make consumers don't have to open the packaging will be able to understand the performance of the product; 5, shrink film sets of label printing belong to film in the printing ( Graphic on the film set inside) , can protect the imprinting, and label wear-resisting performance is better. Design and material selection principle 1, label design on the film set of decoration pattern design should be determined according to the thickness of the film. Design first to find out when the film of transverse and longitudinal shrinkage rate, and allow the shrinkage rate of each direction after packaging and decoration design contraction after allowing deformation error, ensure that the patterns of the contraction after, can accurate reduction. 2, film thickness and shrinkage for shrinkable film set of label materials will focus on three factors: environmental requirements, film thickness and shrinkage properties. To determine the film thickness is based on label application field and cost factors. , of course, the price is not the decisive factor, because each film has its uniqueness, users and trademark printing vendors before the signing of the film and the most suitable materials used must be clear. In addition, the requirements of the indicators, and other processing equipment technological factors directly affect the thickness of the choice. Usually requires making shrinkable film set of tags film thickness is 30 ~ 70 microns, among them, 40 microns, 50 microns thin film applications. In addition, the shrinkage of thin film has certain requirements, and the horizontal ( TD） Shrinkage rate is higher than the longitudinal ( 医学博士) The shrinkage rate. Commonly used materials of transverse shrinkage rate is 50% ~ 52% and 60% ~ 62%, special circumstances can reach 90%. Longitudinal shrinkage rate was 6% ~ 8%. When making shrinkable film set of tags, should choose as far as possible longitudinal shrinkage of small material. Thin film material shrinkage film set of label materials are mainly PVC ( Polyvinyl chloride) Film, PET ( Polyester) Film, PETG ( Modified polyester) Film, OPS ( Orientation polystyrene) Membrane, etc. Its performance is as follows: 1, PVC film, PVC film is the most widely used a thin film material. Its price is low, large range of temperature shrinkage and the requirement of heat source is not high, main processing heat source is a combination of hot air, infrared or both. But PVC hard to recycle, burning gas, is not conducive to environmental protection, use has also been banned in Europe, Japan. 2, OPS film as a substitute for PVC film, OPS film get increasingly extensive application. Its shrinkage performance good, also is beneficial to environmental protection. The products in the domestic market demand, at present the high quality of OPS rely mainly on imports, which become an important factor of restricting its development. 3, PETG film PETG copolymer film is not only conducive to environmental protection, and can adjust the shrinkage rate in advance. However, due to the large shrinkage rate, in use will be restricted. 4, PET film, PET film is internationally recognized environmental protection heat shrinkable film material. Its technical indicators, physical properties, application scope and method of use are close to the PVC heat shrinkable film, but cheaper than PETG, is currently the most advanced one-way shrink film. The transverse shrinkage rate was 70%, and the longitudinal shrinkage rate less than 3%, and non-toxic, no pollution, is the most ideal replace PVC materials. In addition, heat shrinkable film tube is a shrinkable film set of label material production, and in the production of a molding without a stitch. Compared with horizontal flat film, heat shrinkable film tube production shrinkable film set of tags cost is low, but the pipe body surface printing is relatively difficult to achieve. At the same time, heat shrinkable film tube by only printing labels in thin film surface, in the process of transportation and storage by easy to wear and tear, which affect the packaging effect. Shrinkable film set of label printing, printing 1 on the selected films for printing. At present, the shrinkable film set printing mainly USES the intaglio printing, use of solvent-based inks, followed by the flexible printing. With the development of flexo printing technology, printing colors should be bright and clear, can be comparable to those, gravure gravure thick and high gloss. In addition, flexo printing using water-based ink, more environmentally friendly. 2, cutting with high performance of the cutting machine to print the drum longitudinal cutting on thin film material, to the edge of the film part of the process at the same time, make it smooth, level off, not curly. Avoid the blade should be paid attention to in the use of cutting machine heating, for fever will lead to the film is cutting blade part of the corrugate. 3, after the suture of slitting film by stitching machine center suture, pipe sticking, form needed for packaging film sets. Materials need to sewing allowance depends on the precision of suture and the skills of operating personnel, the biggest suture xu dosage of 10 mm, usually is 6 mm. 4, transverse cutting film set packing outside the goods, packing in cutting machine according to the size on the transverse cutting. Shrinkable film under the proper heating temperature, the length and width will be a sharp contraction ( 15% ~ 60%) 。 General requirements film size than goods shape the biggest size is about 10%. 5, heat shrinkable through thermal channel, hot oven heating or hot air gun.