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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...
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...
The advantages of flexible packaging
Flexible packaging refers to the packaging form made of flexible materials (such as plastic film, aluminum foil, composite materials, etc.), and is widely used in industries such as food, medicine, and daily chemicals. Compared with traditional rigid packaging (such as glass bottles, metal cans, paper boxes, etc.), flexible packaging has the following significant advantages: 1. Lightweight and space-saving Soft packaging materials are lightweight and can significantly reduce transportation...
The food flexible packaging industry is showing a diversified development trend
The food flexible packaging industry is showing a diversified development trend along with the upgrading of consumer demands and technological innovations, mainly reflected in the following aspects: 1. Sustainable and environmentally friendly Environmental protection pressure is driving the application of degradable materials (such as PLA, PBAT) and single-material composite technologies to reduce the impact of traditional multi-layer composite materials on recycling. Bio-based films,...
Precautions for the use of flexible food packaging
Food flexible packaging is widely used in daily life due to its advantages such as lightness, easy sealing and low cost. However, the following points should be noted during the usage process to ensure food safety and packaging performance. 1. Choose the appropriate packaging material Common materials for flexible packaging include plastic, aluminum foil and composite film, etc. The heat resistance, barrier properties and oil resistance of different materials vary. For instance,...
Precautions for Polyurethane adhesives
Polyurethane adhesive is a high-performance bonding material, widely used in bonding materials such as metal, plastic, wood and rubber. The following points should be noted during use to ensure the bonding effect and safety: 1. Surface treatment Before bonding, the surface of the objects to be bonded must be thoroughly cleaned to remove impurities such as oil stains, dust, rust or mold release agents. For non-polar materials (such as polyethylene and polypropylene), it is recommended to carry...
Future trends of polyurethane adhesives
As a high-performance material, the future development trend of polyurethane adhesives will revolve around four major directions: environmental protection, high performance, functionalization and expansion of application scenarios, in order to meet the demands of global industrial upgrading and sustainable development. 1. Environmental protection and green transformation With the tightening of global environmental protection regulations (such as REACH and VOCs emission limits), waterborne...
The development of flexible packaging
The development history of flexible packaging reflects the evolution of modern industrial technology and consumer demand. Before the middle of the 20th century, traditional packaging was mainly made of metal, glass and hard plastic, which was costly to transport and inconvenient to use. With the breakthroughs in petrochemical technology, flexible composite materials such as polyethylene (PE) and polypropylene (PP) emerged in the 1950s and 1970s. Flexible packaging, with its advantages of...
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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.