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The steaming and boiling type polyurethane laminating adhesive is a special lamination raw material for high-temperature sterilization food packaging. Relying on the high-crosslinking polyester molecular structure, it can withstand boiling and steaming processes at temperatures above 121℃, and is widely used in the lamination of packaging bags for meat marinated products, pre-prepared foods, and high-temperature sterilization snacks. This type of adhesive is made by combining high-functional...
Water-based flexible packaging polyurethane laminating adhesive is an environmentally friendly adhesive that uses water as the dispersion medium and does not contain organic solvents. It is a core green material that replaces traditional solvent-based adhesives. Compared with solvent-free and solvent-based polyurethane adhesives, the greatest advantage of this product is its low VOC content and no risk of flammability or explosion. It completely solves the safety and environmental protection...
Solvent-free polyurethane laminating adhesives are the core material for the green upgrade of flexible packaging. They eliminate the use of large amounts of organic solvents in traditional solvent-based adhesives, meeting the dual development requirements of environmental protection and safe production in the packaging industry. They have now been widely applied in the production of snack, frozen food, and seasoning composite films. The traditional solvent-based glue production process...
Flexible packaging polyurethane laminating adhesives are the core auxiliary materials for the production of flexible laminated packaging in industries such as food, cosmetics, and medicine. With excellent adhesion, flexibility, and weather resistance, they have become the preferred adhesive products for laminating various substrates such as films, aluminum foil, and paper. In the industry, based on the raw material structure and system characteristics, they are mainly divided into two...
The Influence Of Temperature On Flexible Packaging Polyurethane Laminting Adhesives
Polyurethane laminating adhesives are the core material in the production of flexible packaging lamination. Temperature, as a crucial environmental and process parameter, directly affects the curing reaction of the adhesives, the coating effect, and the quality of the laminated products. It is an important factor in controlling the yield rate of flexible packaging production. Excessive low temperature will significantly inhibit the molecular movement of the adhesive, slow down the...
Factors Affecting Flexible Packaging Polyurethane Lminating Adhesives
Polyurethane laminating adhesives are the core materials in the production of flexible packaging lamination. Their bonding strength, curing effect, and product stability are influenced by multiple factors, directly determining the lamination quality and service life of flexible packaging products. The key influencing factors mainly lie in the formulation, environment, substrate, and construction process. The formulation ratio of the adhesive itself is the fundamental key. The ratio of the...
In the production of flexible packaging lamination, most people focus on the coating amount, ratio and initial adhesion effect of polyurethane laminating adhesives, but often overlook the core role of the curing process. In fact, the curing of flexible packaging polyurethane laminating adhesives is a crucial step that determines the quality of the laminating products, and directly affects the performance and service life of the packaging. The curing process of polyurethane laminating...
Analysis Of The Aging Resistance Of Flexible Packaging Polyurethane Laminating Adhesives
Flexible packaging polyurethane laminating adhesives are the core materials for the lamination of food, daily chemical, and pharmaceutical flexible packaging. Their aging resistance directly determines the service life and safety of the packaging products, and is also a key indicator for evaluating the bonding quality. In general, high-quality two-component polyurethane flexible packaging adhesives possess excellent comprehensive aging resistance and can be adapted to most normal temperature,...
Five key points to keep in mind when using flexible packaging polyurethane laminating adhesives
Flexible packaging polyurethane laminating adhesives are the core materials for film laminating and flexible packaging production. The bonding effect directly affects the sealing, durability and safety of the packaging products. To avoid problems such as delamination, blistering and poor curing, and to ensure production quality and construction safety, the following five key points need to be paid special attention to when using them. 1. Strictly control the mixing ratio. This adhesive is...
The six key features of flexible packaging polyurethane laminating adhesives
Flexible packaging polyurethane laminating adhesives are the core materials for the composite processing of packaging in industries such as food, cosmetics, and medicine. With excellent comprehensive performance, they have become the mainstream bonding materials in the soft packaging industry. Their core features include six prominent aspects. 1. The bonding strength is high and the stability is good. It can firmly adhere to various flexible packaging substrates such as plastics and aluminum...
Analysis Of The Compressive Strength of Flexible Packaging Polyurethane Laminating Adhesives
The composite strength is the core indicator for evaluating the bonding performance of flexible packaging polyurethane laminating adhesives. It directly determines the inter-layer stability of the composite film and is the key to preventing packaging problems such as delamination, glue separation, and bulging. It is widely used in the production of flexible packaging in fields such as food, cosmetics, and medicine. The industry usually uses the T-type peel strength as the testing standard. The...
Techniques for Using Flexible Packaging Polyurethane Laminating Adhesives
The flexible packaging polyurethane laminating adhesive, with its strong bonding strength, excellent flexibility, and excellent heat resistance and weather resistance, is widely used in the laminating process of food and daily necessities flexible packaging. The proper usage techniques are crucial for preventing problems such as delamination, blistering, and wrinkling, and ensuring the quality of the packaging. Base material pre-treatment is the foundation for a strong bond. Before the...
Key points for controlling the coating amount of flexible packaging polyurethane laminating adhesive
The coating amount is the core parameter in the laminating adhesive compounding process of flexible packaging. It directly determines the bonding strength, appearance quality and durability of the packaged products, and is a key link in improving the quality and reducing the consumption of flexible packaging production. In the industry, the dry basis coating amount is used as the unified measurement standard. The setting of the coating amount is not a fixed value. It needs to be precisely...
Volatile Analysis Of Flexible Packaging Polyurethane Laminating Adhesive
The volatility of flexible packaging polyurethane laminating adhesives is a key indicator that affects the quality, production safety, and environmental compliance of packaging products. It is mainly manifested as the release of volatile organic compounds (VOCs) during the production curing process, directly impacting the safety of food packaging and the production environment in the workshop. Currently, the mainstream adhesives in the industry are divided into solvent-based, water-based, and...
Application Of Polyurethane Laminating Adhesive In Food Flexible Packaging
Food flexible packaging serves as an important carrier for food preservation and storage during transportation. With the upgrading of the food industry, multi-layer lamination flexible packaging has become the mainstream. Polyurethane laminating adhesives, due to their excellent comprehensive performance, have become the core material for the lamination processing of food flexible packaging, accounting for over 80% of the market share. Polyurethane laminating adhesive is suitable for various...
With the acceleration of the green transformation in the packaging industry, environmentally friendly polyurethane laminating adhesives for flexible packaging are gradually replacing traditional solvent-based adhesives and have become the core material for the production of flexible packaging for food, medicine, and daily necessities, aligning with the development trend of low-carbon and environmentally friendly industries. This adhesive is mainly divided into two categories: solvent-free...
Flexible packaging polyurethane laminating adhesives are the core materials for the production of food and daily necessities flexible packaging lamination. The adhesive's bonding stability directly determines the quality of the packaged products. Many people only focus on the application process but overlook the storage stage. In fact, proper storage conditions are the key to ensuring the performance of the adhesives and avoiding production losses. Their importance cannot be ignored. The...
Water-based flexible packaging polyurethane laminating adhesive is an environmentally friendly adhesive that uses water as the dispersion medium. It has abandoned the organic solvent system of traditional solvent-based adhesives. With advantages such as low VOC content, no odor, and safety and flame retardancy, it has become the core material for the green upgrade of the flexible packaging industry. It is widely used in the flexible packaging lamination fields of food, cosmetics, and...
Can the unused flexible packaging polyurethane laminating adhesive be reused?
Flexible packaging polyurethane laminating adhesives are commonly used materials in the lamination processing of food and daily necessities packaging. In many production scenarios, there will be leftover adhesive liquid. Many people wonder if such residual adhesive can be reused. In fact, this type of adhesive is not absolutely un-reusable, but it cannot be used for secondary purposes at will. It needs to be judged strictly based on the state of the adhesive liquid and the preservation method,...
The influence of air humidity on the polyurethane laminating adhesive for flexible packaging
The flexible packaging polyurethane laminating adhesive is highly sensitive to air humidity. Humidity is the core environmental factor that affects its curing reaction, bonding strength and product quality. It directly determines the construction effect and bonding stability. In industrial construction, it is necessary to strictly control the environmental humidity. The appropriate humidity is the optimal environment for the curing of polyurethane adhesives. Adequate moisture can assist in...
In the production of flexible packaging, BOPP, CPP, PE and other plastic substrates are commonly used materials for lamination processing. These substrates have strong chemical inertness, extremely low polarity and low surface tension. If polyurethane laminating adhesive is directly applied, the adhesive is difficult to evenly wet and spread, and cannot form a firm bond. This easily leads to problems such as lamination delamination, blistering, and insufficient peel strength. Therefore, before...
The hazards of incomplete curing of the flexible packaging polyurethane laminating adhesive
The flexible packaging polyurethane laminating adhesive forms a dense cross-linked structure through chemical reactions, thereby achieving bonding and sealing effects. However, if the curing process is incomplete after construction, it will cause a series of quality problems, significantly reducing the product quality and service life, and bringing numerous hidden dangers. The most direct consequence of incomplete curing is a significant reduction in bonding strength. The adhesive layer...
Can polyurethane laminating adhesive be used for packaging oily foods?
Polyurethane laminating adhesive can be used for packaging of oily foods, and it is currently the mainstream choice in the lamination process of food flexible packaging. It is widely applied in the production of packaging for oily foods such as fried snacks, nuts, meat products, and sauces. Compared with ordinary adhesives, polyurethane adhesive has excellent oil resistance, bonding strength and chemical stability. It can effectively resist the penetration and erosion of oil, avoiding problems...
The influence of solvents on the flexible packaging polyurethane laminating adhesive
Solvents are the core auxiliary components of the flexible packaging polyurethane laminating adhesive, directly influencing the coating performance of the adhesive, the curing effect, and the quality of the composite product. They are the key factors in controlling product quality in the dry lamination process of flexible packaging. Polyurethane laminating adhesives for flexible packaging are often used in combination with inert solvents such as ethyl acetate. The purity, evaporation rate, and...
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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.