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Characteristics and applications of polyurethane ink binders
Printing ink is a mixture formed by the uniform dispersion of components such as resin binder, pigment (filler), additives and solvents. Resin binder, as the "heart" of ink, mainly plays the role of dispersing pigments and connecting substrates. Polyurethane resin as an ink binder has the following advantages: (1)Flexibility In the field of flexible packaging printing, as the printing substrate is flexible materials such as PE, OPP, and PET, the ink film should not be too brittle after...
Can polyurethane adhesive be used for beverage packaging bags?
To sum up, the conclusion is: Yes, and polyurethane adhesives are one of the most widely used and outstanding adhesives in the field of high-performance beverage packaging at present. The main reason lies in the fact that polyurethane adhesives can perfectly meet the strict requirements of beverage packaging for safety, barrier properties and durability. The specific analysis is as follows: 1. Outstanding composite strength and flexibility: Beverage packaging bags typically adopt a...
Application of Polyurethane Adhesives in Lithium batteries and related matters
Polyurethane adhesives play a significant role in lithium battery manufacturing due to their unique properties, mainly used for the packaging and structural bonding of battery cells. 1. Main applications (1)Cell packaging (pouch battery) : This is its most core application. Polyurethane adhesives (usually in the form of heat-sealing films) are used to bond the multi-layer structures (nylon, aluminum foil, polypropylene) of aluminum-plastic encapsulation films. It must provide extremely high...
Which flexible packaging can use polyurethane adhesives?
Polyurethane adhesives, due to their outstanding performance, are one of the most widely used and important types of adhesives in the field of flexible packaging lamination. It mainly forms a high-strength and high-toughness chemical structure through the reaction of two components (the main agent and the curing agent), thereby achieving a firm bond between films of different materials. The following are the main types of flexible packaging applicable to polyurethane adhesives and their...
Why is the flexible packaging industry more inclined to choose polyurethane adhesives?
The flexible packaging industry is increasingly favting polyurethane adhesives (PU adhesives), mainly because they can fully meet the comprehensive requirements of modern packaging for performance, safety, efficiency and environmental protection, and are an ideal choice to replace traditional solvent-based adhesives and single-performance adhesives. Its core advantages are reflected in the following aspects: First of all, the outstanding composite performance is the fundamental basis for the...
Introduction to Polyurethane Adhesives for Flexible Packaging
Polyurethane adhesives for flexible packaging are key components used in flexible composite packaging materials for food, daily chemicals, pharmaceuticals and other products. Its main function is to firmly bond two or more films of different properties (such as BOPP, PET, PA, AL, CPP, PE, etc.) together to form a composite structure with various excellent properties, so as to meet the requirements for barrier properties, weather resistance, aesthetics and mechanical strength. At present, the...
Polyurethane adhesive: The Invisible Guardian of the flexible packaging industry
In modern life, flexible packaging, with its lightweight, durable and multi-functional features, is widely used in numerous fields such as food, medicine and daily chemicals. Behind this seemingly simple film composite structure, polyurethane adhesives play an indispensable role, serving as a key guarantee for the performance and safety of flexible packaging. Flexible packaging is usually composed of multiple layers of films made of different materials, such as polyethylene, polypropylene,...
The Application of Polyurethane Adhesives in Flexible Packaging
Polyurethane adhesives are indispensable key materials in the modern flexible packaging industry. Their outstanding comprehensive performance makes them the preferred bonding solution for composite film packaging. It creates packaging materials with multiple functions by firmly laminating different plastic films (such as BOPP, PET, PE, CPP, aluminum foil, galvanized film, etc.) together, and is widely used in many fields such as food, medicine, and daily chemicals. 1. Core advantages and...
The application of polyurethane resin in ink
Ink with polyurethane as the main resin binder is called polyurethane ink. The molecular structures of different types of polyurethane resins vary, and thus the types of polyurethane inks prepared from them also differ. At present, polyurethane inks can be classified into several types based on their resin structure composition, solvents and curing principles, such as one-component volatile polyurethane inks, two-component reactive polyurethane inks, UV-curable polyurethane inks and water-based...
An explanation of the role and application of polyurethane adhesives in ink printing
Polyurethane adhesives play a crucial role in the field of ink printing. Their main function is to serve as binders (or bonding materials), and they are the core components that determine the performance of inks. Main Functions: 1. Excellent adhesion: The polyurethane molecular chain contains highly polar urethane bonds, which can form a strong adhesive force with various polar (such as plastic films, metal foils) and non-polar substrates (such as polyolefins treated with corona), ensuring...
Precautions for the use of polyurethane adhesives
Polyurethane adhesives are widely used in multiple fields due to their excellent bonding performance, flexibility and fatigue resistance. To ensure its optimal performance and guarantee operational safety, the following key points should be noted during use: 1. Surface treatment is the core The surface treatment of the materials to be bonded is the most crucial link that determines the success or failure of the bonding. First of all, it is necessary to thoroughly remove contaminants such as...
Which flexible packaging can use polyurethane adhesives?
Polyurethane adhesives have become one of the most important types of adhesives in the field of flexible packaging composite materials due to their outstanding properties, such as high bonding strength, good flexibility, and excellent resistance to media (oil, acid, and chemicals). It is mainly applied in packaging structures that require high-strength composites and special functional requirements. Its wide application mainly includes the following major categories of flexible...
Overview of PU Adhesive for Flexible Packaging
Flexible packaging polyurethane adhesive is a key material used in the production of flexible packaging composite materials for food, daily chemicals, pharmaceuticals and other products. Its main function is to firmly bond films of different properties (such as BOPP, PET, PA, AL, CPP, PE, etc.) together through dry lamination process. The core component of this type of adhesive is polyurethane, which contains a large number of carbamate bonds in its molecular chain. By designing and adjusting...
Six major features of waterborne polyurethane adhesives
Waterborne polyurethane adhesives (referred to as waterborne PU adhesives) refer to adhesives made from waterborne polyurethane as the base material. They are an important type of waterborne adhesives. Due to their excellent bonding properties, outstanding solvent resistance, acid and alkali resistance, impact resistance, wear resistance, and resistance to high and low temperatures, they have developed rapidly in recent years due to the strict environmental protection requirements of the...
To commemorate the 80th anniversary of the victory of the Chinese People's War of Resistance against Japanese Aggression and the World Anti-Fascist War, to carry forward the spirit of patriotism, and to enhance the national defense awareness and national pride of the members of the Party branch of Xin Hui Company. On September 3rd, the Party branch secretary and all the committee members of our company gathered in the company's training room. With excitement and joy, they watched the grand...
Matters related to the curing of polyurethane adhesives
Most polyurethane adhesives do not immediately have a high bonding strength when bonding and still need to be cured. Curing refers to the process by which liquid adhesives turn into solids. The curing process also includes post-curing, that is, the reactive groups in the initially cured adhesives further react or crystallize to achieve the final curing strength. For polyurethane adhesives, the curing process is one that enables the -NCO groups in the adhesive to react completely, or allows the...
The application characteristics of PU glue in flexible packaging
Polyurethane adhesive (PU adhesive) is one of the most crucial materials in modern flexible packaging composite processes, and its application characteristics are extremely prominent, mainly reflected in the following aspects: 1. Excellent comprehensive bonding performance: This is its most core advantage. Polyurethane adhesives have excellent bonding strength and adaptability to a variety of common substrates in flexible packaging, such as BOPP, PET, PA, AL aluminum foil, CPP, PE, etc....
Why is polyurethane adhesive used in food flexible packaging?
Food flexible packaging is usually a composite material, which is made by bonding different materials such as plastic film (such as BOPP, PET), aluminum foil, nylon, etc. through dry lamination process. This structure demands that the adhesive must possess outstanding comprehensive performance, and polyurethane adhesives precisely meet these demanding requirements. First of all, its excellent bonding performance is the cornerstone for its selection. Polyurethane adhesives have extremely...
Basic properties of polyurethane adhesive
1. Polyurethane adhesive contains isocyanate group (-－NCO) and carbamate group (-－NHCOO－-) with strong polarity and chemical activity, and has excellent chemical adhesion with materials containing active hydrogen. However, the hydrogen bond between polyurethane and the bonded material will enhance the internal force of molecules and make the bonding stronger. 2. The proportion and structure of soft segment and hard segment in molecular chain can be controlled by adjusting the formula of...
Five major advantages of polyurethane adhesives
Polyurethane adhesives, as a high-performance synthetic adhesive, are widely used in many fields due to their unique chemical structure. Its core advantages are mainly reflected in the following five aspects: 1. Excellent bonding strength and wide applicability The most prominent advantage of polyurethane adhesives is their outstanding bonding strength and wide adaptability to various materials. It can not only effectively bond traditional high surface energy materials such as metal, glass...
The development trend of polyurethane adhesives in the flexible packaging industry
In the current field of flexible packaging, polyurethane adhesives (PU adhesives) continue to hold a dominant position due to their outstanding performance, especially in high-performance packaging applications such as food and pharmaceuticals. Industry information mainly revolves around three dimensions: technological innovation, environmental protection regulations, and market demand. Technology trend: High performance and functionalization To meet the increasingly complex demands of...
A Review of the Dynamics and Trends in the Polyurethane Adhesive Industry
Polyurethane adhesives, as a high-performance bonding material, are widely used in key fields such as packaging, automobiles, footwear, construction and new energy due to their excellent flexibility, impact resistance, low-temperature resistance and good bonding performance to various materials. Recently, the industry has shown the following several notable development trends and news focuses. 1.Green environmental protection and sustainable development have become the core driving...
In what aspects are the advantages of polyurethane adhesives reflected?
Polyurethane adhesives are a type of very important and high-performance polymer bonding materials. Their advantages are mainly reflected in the following aspects: 1. Excellent bonding performance and wide applicability The most prominent advantage of polyurethane adhesives is that they have excellent bonding strength for a variety of materials and can be called "all-purpose adhesives". It can not only effectively bond hard materials with high polarity such as metal, glass and stone, but also...
Prediction of the future development trend of polyurethane adhesives
Polyurethane adhesives have always been key materials in both industrial and consumer fields due to their excellent toughness, impact resistance and bonding adaptability. At present, its technological development is advancing in depth around the three core trends of environmental protection, high performance and functionalization. First, environmental protection transformation has become the core driving force Under the global consensus on sustainable development, the research and development...
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Privacy statement: Your privacy is very important to Us. Our company promises not to disclose your personal information to any external company with out your explicit permission.