With the development of the market economy, the demand for flexible packaging in various industries is also rising year by year. The development of flexible packaging materials and processing technology continue to improve, flexible packaging in many areas is playing an increasingly important role, so what are the composite ways of flexible packaging? This article briefly describes five composite methods of flexible packaging, and the content is for the reference of friends in the adhesive supply chain: Flexible packaging composite The "composite" in the flexible packaging industry is actually the meaning of "lamination", which is to make the film of different properties stick together in a certain way, and then seal it to protect the contents. Flexible packaging composite processing methods mainly include dry composite, wet composite, extrusion composite, co-extrusion composite and so on. Each compound way has advantages and disadvantages, comprehensive understanding to avoid bias! 01 Dry compound Among the various processing technologies of composite film, dry composite is the most traditional and widely used composite technology in China, which is suitable for complex varieties, small batches and a wide variety of packaging products. Widely used in food, medicine, cosmetics, daily necessities, light industrial products, chemicals, electronic products and other packaging. Dry composite is coated with a coating device (generally using gravure cable roller coating) on the plastic film coated with a layer of solvent-based adhesive, the solvent is removed by the recoating machine and dried, in the state of hot pressing and other substrate composite, such as film, aluminum foil adhesion into a composite film, the process is as shown in the following figure, because it is in the adhesive "dry" state (solvent-free state) composite. Hence the name dry compound. Dry composite is suitable for a variety of composite film substrate and film and aluminum foil, paper between the composite, a wide range of applications, excellent corrosion resistance to chemical media, such as food with alkali, acid, spicy, grease and other ingredients, cosmetics with water, flavor, emulsifier and other ingredients, chemicals with solvents, pesticides and other ingredients, widely used in the contents of the harsh conditions of packaging. With high composite strength, good stability and high product transparency, it can produce both high and mid-range composite films, and can also produce frozen, fresh-keeping or high-temperature sterilization composite films. Easy to use and flexible, simple operation, suitable for multi-variety, batch less production. However, the dry compound itself also has defects of poor safety and hygiene, environmental pollution and higher cost, and the development of alcohol-soluble and water-soluble adhesives has slowed down the pressure of solvent-based adhesives in terms of safety and hygiene, environmental pollution and cost to a certain extent. ...

The adhesive of the composite aluminum foil is carried out on the adhesive machine, which is provided with an open scroll of aluminum foil and paper (or plastic film) and a winding shaft of the composite aluminum foil, a plate for holding the binder, a roll system for coating the binder, and also includes a guide roller, a flattening roller, a pressing roller, a heating roller, a cooling roller and a temperature and tension adjustment device. The adhesive methods of composite aluminum foil are wet method, dry method and thermosetting method. Wet bonding Wet bonding is a method of pasting aluminum foil and composite layer together in a wet state with water solvent or water dispersed binder, and then drying and evaporating water, so the composite layer is required to have a certain permeability and porosity. Wet bonding is often used for laminating. Binders should be soluble in water or dilute with water. They can be protein binders such as glue, animal glue and casuran, or carbohydrate binders such as starch, dextrin and cellulose. Organic or inorganic binders such as water glass, acrylic acid, denatured vinyl acetate and ethylene-vinyl acetate copolymers can also be used. The binder is usually neutral, but it can also be slightly alkaline, which corrodes the aluminum foil slightly and thus sticks firmly. The most used binders are sodium silicate (sodium silicate, foaming alkali) and vinyl acetate. Water glass is cheap, but it becomes brittle after drying and turns yellow after long-term storage. Vinyl acetate is strong, soft and resistant to water, but it is expensive. Dry bonding Dry bonding is used to bond plastic films that are not breathable. Binder is divided into three kinds: vinyl acetate, vinyl chloride and other solvent-based; Cellulose nitrate, acetaldehyde cellulose, formaldehyde cellulose and other fiber types; Synthetic rubber and acrylic resin copolymer and other types. Dry bonding first dissolve the binder in a volatile solvent, such as acetone and ethanol, coated on aluminum foil, dried, and then pressed together with the film with a certain pressure. Considering that the drying temperature (about 240 -- 250 ° C) exceeds the temperature tolerance of the plastic film and the physical and chemical action of the solvent on the plastic film, the binder is usually coated on the aluminum foil. In order to improve the pasting fastness, the plastic film should be treated by corona before pasting. In wet and dry pasting, the variety, concentration, viscosity, solid content (kg/m3), operating temperature and coating amount of the binder all affect the bonding fastness and operation speed, which should be determined according to the characteristics of the composite layer material. Thermosetting bonding Thermosetting bonding is divided into two kinds: coated wax bonding and coated polyethylene bonding. Wax-coating bonding is to paste the paper onto the aluminum foil with molten paraffin as the adhesive. According to the melting temperature of...

Water-based pressure-sensitive adhesive is a type of adhesive that uses water as a solvent and is pressure-sensitive, that is, it can adhere quickly to the surface when slight pressure is applied. Due to its environmental protection, non-toxic, cost-effective, adjustable viscosity and other advantages, it has gradually become the mainstream product in the pressure sensitive adhesive market. According to different systems, water-based pressure sensitive adhesive is divided into water-based acrylate system, water-based polyurethane system, water-based latex system and water-based silicone system, etc., which is the most widely used because the water-based acrylate system has a wide adjustable range of performance, rich application scenarios, and high cost performance characteristics. Characteristics of water-based pressure sensitive adhesive 1, strong adhesion: Water-based pressure sensitive adhesive can form a uniform adhesive layer on different types of substrates, compared with other chemical adhesives, its adhesion is stronger, and can cope with different conditions, such as temperature, humidity, etc. 2, drying fast: water-based pressure sensitive adhesive solid content is relatively high, easy to volatilization in processing, drying time is fast, high processing efficiency. 3, Environmental protection: the preparation of water-based pressure sensitive adhesive does not require the use of organic solvents, reducing environmental pollution and safety risks, with low volatility and low VOC content. Application of water-based pressure sensitive adhesive 1.labels and stickers: such as self-adhesive labels, post-it notes, decorative stickers, body stickers, etc. 2.Medical tape/dressing: such as band-aid, dressing, surgical dressing, etc. 3.industrial tape: such as a variety of pressure sensitive tape, transparent tape, BOPP film tape, duct tape, double-sided tape, foam tape, sealing tape, paper tape, high temperature tape, etc. 4.plastic film class, such as PE, PP, PVC and polyester film. In addition, water-based pressure sensitive adhesive can be applied to a variety of substrates (such as foam, non-woven fabrics, nylon fabrics, etc.) self-adhesive processing, shoe materials, paper products, etc., can also be used for high-grade crafts processing, special paper products. For these specific applications and different coating methods, Intron has developed a number of water-based pressure-sensitive adhesives, each with a different solid content and viscosity to suit their specific use. 5.Make up and protect yourself 6.A kind of water-based pressure sensitive adhesive system made by special synthesis process and formula combination can also be used in beauty care scenes, with skin-friendly effect to prevent allergies. Water-based pressure sensitive adhesive (Universal)

Welcome to Sinograce, a leading brand in the chemical coating industry. In this SEO-optimized article, we will explore the world of BOPP lamination glue and adhesive tape glue, with a focus on Sinograce's exceptional BOPP acrylic clear adhesive. As a trusted manufacturer in the field, Sinograce offers innovative adhesive solutions that enhance the performance and durability of BOPP tapes. Throughout this article, we will address frequently asked questions (FAQs) to provide you with comprehensive insights into this specialized domain. Understanding BOPP Lamination Glue BOPP lamination glue plays a crucial role in the production of high-quality BOPP tapes. Sinograce's BOPP lamination glue is specifically formulated to provide excellent adhesion, ensuring a strong bond between the BOPP film and other substrates. This adhesive solution offers exceptional heat resistance, moisture resistance, and long-lasting durability, making it ideal for various applications. Exploring Adhesive Tape Glue Adhesive tape glue is a key component in the manufacturing process of BOPP tapes. Sinograce's adhesive tape glue is designed to deliver superior bonding strength, ensuring reliable adhesion to different surfaces. With its excellent tackiness and cohesive properties, this adhesive solution provides enhanced performance and stability, even in challenging environments. Sinograce's BOPP Acrylic Clear Adhesive Sinograce's BOPP acrylic clear adhesive stands out as a premium choice for BOPP tape applications. This adhesive offers exceptional clarity, allowing the tape's design or printed content to remain visible. Its high initial tack and peel strength ensure secure bonding, while its resistance to aging and yellowing guarantees long-term performance. Sinograce's BOPP acrylic clear adhesive is a reliable solution for industries such as packaging, labeling, and more. FAQs (Frequently Asked Questions): Q1: What makes Sinograce's BOPP acrylic clear adhesive superior? A1: Sinograce's BOPP acrylic clear adhesive stands out due to its exceptional clarity, high initial tack, peel strength, and resistance to aging and yellowing. These qualities ensure reliable and long-lasting adhesion for BOPP tapes. Q2: Can Sinograce's adhesive solutions withstand extreme temperatures? A2: Yes, Sinograce's adhesive solutions, including BOPP lamination glue and adhesive tape glue, are formulated to withstand a wide range of temperatures, ensuring optimal performance in various environments. Q3: Are Sinograce's adhesive solutions environmentally friendly? A3: Yes, Sinograce is committed to sustainability and offers environmentally friendly adhesive solutions. Our products comply with industry standards and regulations, promoting a greener and more sustainable future. Conclusion: Sinograce's expertise in the production of BOPP lamination glue, adhesive tape glue, and BOPP acrylic clear adhesive makes it a trusted partner for businesses in the chemical coating industry. With a focus on quality, du...