Self-adhesive refers to paper, film or other special materials as fabric, coated with adhesive on the back, a composite material printed with silicon protective paper as the base paper, the reason for the rapid rise of self-adhesive in recent years, because it is very practical, and very convenient, the cost is not high, the following to tell you about a few small knowledge of self-adhesive printing. Printing size Specifications and dimensions of self-adhesive printing labels, appearance, shape and color of products. According to the size of the product, the content needs to customize the size and shape style is very much, there are round, rectangular, square, rounded corner, irregular shape. To customize the shape and color to match the style characteristics of the product. Printing material Self-adhesive printing label material, the use of adhesive type. Some stickiness is strong, some stickiness is not strong, some can not tear, some can move, there are many kinds of self-adhesive labels, there are thermal paper, PET matte silver paper, coated paper, kraft paper, brushed self-adhesive stickers, transparent PVC stickers, water-soluble paper, etc. Common Uses The common uses of self-adhesive printing labels are customized according to the categories and nature of the products, such as trademarks, stickers, signs, inscription boards, etc., which are not only applied in food and beverage, daily necessities, household appliances, cultural and educational supplies, but also in the field of commodity circulation of price labels and clothing, textiles, medicine, cosmetics and other aspects. At present, our company's waterborne adhesive and and waterborne Label adhesive, has been put on the market, the market feedback is good, the performance is excellent, fully able to meet the complex needs of customers of various packaging structures. For example Description Water based pressure adhesive for paper materials SA-232H is an adhesive specially designed for reverse and various gravure coaters at higher converting speeds, for the production of general purpose paper labels or other pressure sensitive articles. Type Acrylic ester and vinyl ester copolymer dispersion Key Features -Non-yellowing -Wider application range -Very good bleeding resistance -Very good paper-aging resistance -Excellent balance of tack and shear -Higher productivity through high speed converting -Good temperature and aging resistance Typical Properties Appearance Milky white liquid pH 6.0-8.0 Solid content 54±1% Type of emulsion Anionic Viscosity (25℃) 200-300mPa·s Density (20℃) 1.02 g/cm3 Application -General purpose paper labels -Various single copper, mirror copper paper, mirror wet paper, thermal paper, mirror aluminum paper, aluminum foil label and advertising materials

Labels, as they are called in the printing industry, are mostly printed materials used to identify the relevant instructions of their products, and most of them come with glue on the back. But there are also some printing without glue, can also be called labels. Glue label is colloquially known as "sticker label". Label base material classification Substrate application surface material paper Coated paper,writing paper,thermal paper,Mirror coated paper,fluorescent paper,kraft paper,laser paper,Transparent heat-sensitive paper,specialty paper film PET PP PVC HDPE CPP BOPP,pearlized film,synthetic paper,Special film other Aluminum foil paper,aluminized paper,pure aluminum paper,silk cloth synthetic paper,cloth,Foam and so on colour transparency,abrazine,Light white,matte white,Light silver (bright silver),matte silver,golden,laser In our daily life, we often come across some products with labels. After tearing off the labels, there will often be residual glue, which is difficult to remove and affects our use experience. In order to improve user experience, removable self-adhesive labels emerge at the historic moment. As can be seen from its name, it is easy to remove, and can be repasted and used many times. After the label is attached to the commodity, the label can be easily removed from the commodity surface under the condition of relatively stable environment, and the adhesive does not remain on the surface of the object. Between the surface material and the base material of the self-adhesive label, the removable adhesive is used as the adhesive. Suitable for different surface materials and use environment. First of all, removable self-adhesive labels have been widely used in household electrical products, mainly as decorative labels. Its feature is that it can be removed at any time, but also can be retained for a long time. It is also recommended to use removable self-adhesive labels when the goods need to be promoted, so that when we remove the labels from the goods, we can ensure the integrity of the goods surface. There are some daily necessities at the seal, using can also remove the sticker label, can be reattached or multiple use. In addition, there are clothing textile surface labels and special labels in office supplies, are removable sticker labels. In a relatively stable environment, the label can be easily removed from the surface of the product, and the adhesive does not remain on the surface of the object. The reason why the removable sticker label has such a unique performance is that it mainly uses a removable adhesive, which effectively prevents the adhesive from falling off from the surface of the product when the label is removed from the surface of the product. But there is no need to worry about the removable sticker label so easy to fall off, although it can be easily removed clean, but this does not mean that its bond strength is not good, as long as the correct and reasonable use,...

Polyurethane (polyurethanes, abbreviated PU) is a kind of polymer with -NHCOO-repeat structural unit as the main chain. Isocyanate (monomer) is polymerized with a hydroxyl compound.Due to the strong polarity of the carbamate group, insoluble in non-polar groups, with good oil resistance, toughness, wear resistance, aging resistance and adhesion. Materials suitable for a wide temperature range (-50 -- 1500℃) can be prepared with different raw materials, including elastomer, thermoplastic resin and thermosetting resin. It is not resistant to hydrolysis or alkaline medium at high temperature. Adding polyurethane resin to the ink can improve the wettability of the ink to the pigment, and the film is good, the ink film is fast and wear-resistant, and it is used in the manufacturing of offset printing and water-based ink, but the price is higher. The polyurethane resin used for printing ink is generally made of polyester/polyether polyol and isocyanate reaction, molecular weight of about 20,000 ~ 40,000. Its solvent mainly to benzene, ketone, ester solvent as the main solvent. In the process of research and development according to the ink factory and printing plant environmental protection needs, using ketone ester solvent or alcohol ester solvent to prepare the corresponding benzene free ink resin. The characteristics of polyurethane resin for printing ink are as follows: ①Excellent yellowing resistance. The polyurethane resin for printing ink is synthesized by aliphatic polyester and aliphatic isocyanate as the main raw materials in the process of preparation. Compared with aromatic polyurethane, it has excellent optical stability, and the film has excellent yellow resistance. ②Excellent adhesion fastness to film substrates. Ink with polyurethane resin molecular chain segment contains carbamate, urea formate, ester bond, ether bond and other polar groups, and a variety of polar substrates PET, PA and other plastic surface polar groups to form hydrogen bonds, and then the formation of a certain connection strength of the joint. The polyurethane resin made of ink, printing on the surface of polar plastic substrate has good adhesion fastness. ③Good affinity and wettability with pigments/dyes. Polyurethane resin for printing ink is generally prepared by polyester or polyether polyols, aliphatic diisocyanate and diamine/diol chain extender. Due to the introduction of urea bond in PU resin, polyurethane monourea resin (PUU) is formed, which makes it have good dispersion wettability for pigments. ④Good resin compatibility. Ink with polyurethane resin and aldehyde-ketone resin, chloro-vinegar resin has a good compatibility, according to the actual situation in their own process formula appropriate to add, in order to improve the comprehensive performance of ink. ⑤Excellent film forming properties. Ink polyurethane resin and other fields of polyurethane resin used in the structure is different, the traditional polyurethane is mainly polyester polyol/polyethe...

Polyurethane adhesive is a kind of high-grade adhesive, with excellent flexibility, impact resistance, chemical resistance, wear resistance, and the most important is its low temperature resistance. Because of its series of advantages, polyurethane adhesives are widely used in the following fields. 1. Carpentry industry With the improvement of people's awareness of environmental protection, the wood processing industry has gradually used a new type of environmentally friendly polyurethane adhesive to replace the urea-formaldehyde resin, so as to reduce the pollution to the environment. One-component moisture-cured polyurethane adhesives used in the woodworking industry are liquid and used at room temperature. Usually, it has high bonding strength, good flexibility and water resistance, and can be bonded to many non-wood substrates (such as metal, plastic, rubber, etc.). The dry and wet strength of one component polyurethane adhesive is better than that of phenolic adhesive. Before bonding, coating hydroxymethyl resorcinol (HMR) coupling agent on the surface of bonding substrate can improve bonding strength. 2.Shoe industry Our country is always a large shoe-making country, and in recent years the preparation technology of water-based polyurethane is becoming mature. For some low-polarity shoe materials, such as SBS and other materials bonding, the peeling strength of polyurethane adhesive can not meet the requirements. Polyurethane adhesives for shoes with high crystallinity, high crystallization rate, high cohesion strength and good peeling strength can be developed by adding viscosifying resin. 3.Packaging industry Flexible packaging has surpassed hard packaging, such as plastic, glass bottles and cans, for its unique comprehensive performance such as light and convenient, long shelf life, sanitation, easy storage and transportation, easy to disassemble, less garbage and good shelf effect. Because of its excellent performance, polyurethane adhesive can bond film materials of different properties together to get cold resistance, oil resistance, drug resistance, transparent, wear resistance and other properties of flexible packaging composite film. At present, polyurethane adhesive has become the main adhesive for flexible packaging composite film processing in domestic and foreign markets. 4.Construction and paving industry In addition to the advantages of non-toxic, pollution-free, easy to use, polyurethane adhesive also has other incomparable advantages, that is, excellent low temperature resistance, solvent resistance, aging resistance, ozone resistance and bacteria resistance, in the application of building pavement materials plays an important role. It is widely used in elastic rubber floor MATS, hard rubber floor tiles and laying plastic track sports fields. The new two-component polyurethane adhesive breaks through the contradiction between the shear strength and the peeling strength of the traditional adhesive, and can make both of them ...