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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...
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...
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...
The future development trend of ink binder
The future development of ink binders will closely revolve around the three core trends of environmental protection, high efficiency and functionalization. Its evolution direction profoundly reflects the requirements of industrial upgrading and sustainable development. First of all, environmental protection and sustainability are the primary driving forces. Traditional petroleum-based solvent-based binders are gradually being replaced by more environmentally friendly alternatives due to their...
Promote the green development of flexible packaging printing by enhancing quality with nove
According to incomplete statistics, the global packaging market size will reach 1.14 trillion US dollars, and the output value of China's packaging industry can approximately reach 2.5 trillion yuan, accounting for about 25% of the global packaging market. As an important component of the packaging industry, the Chinese packaging and printing industry accounts for more than 20% of the global packaging and printing market. With the rapid development of the domestic e-commerce industry, the...
The application of polyurethane adhesives in various industries
Polyurethane adhesives have become one of the most widely used types of adhesives in the industrial field due to their outstanding bonding performance, excellent flexibility, good impact resistance and low-temperature resistance. Its unique chemical structure enables the preparation of products ranging from soft elastomers to hard solids through formula design, to meet the demands of various industries. In the transportation industry, polyurethane adhesives are crucial materials. It is widely...
The future direction of polyurethane adhesives
Polyurethane adhesives, as a high-performance material, have been widely applied in the automotive, construction, electronics, packaging and other fields due to their excellent flexibility, chemical resistance, bonding strength and environmental adaptability. In the future, its development direction will revolve around environmental protection, high performance, functionalization and intelligence to meet the global sustainable development demands and technological upgrading requirements. 1....
Ink printing is a process with high technical requirements, involving meticulous operations in multiple links. To ensure printing quality, the following key points need to be noted: 1. Ink selection and blending Select the matching ink type according to the substrate (such as paper, plastic, metal, etc.). For instance, plastic printing requires the use of inks with strong adhesion, while food packaging needs to meet safety standards. When preparing special color inks, it is necessary to...
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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.