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Bonding technology of polyurethane adhesive (Ⅱ)
3. Roughening treatment If the bonding surface is smooth, it is generally necessary to roughen it first to increase the contact area between polyurethane adhesive and substrate. Polyurethane adhesive permeates into the recesses or pores on the surface of the substrate, and after curing, it can be embedded like "nails, hooks and sticks", which can firmly stick the substrate together. Commonly used treatment methods include sand blasting, wood file coarsening and sandpaper grinding. However, if...
Bonding technology of polyurethane adhesive (I)
Polyurethane adhesive is a kind of adhesive with strong adhesion and excellent performance. It has excellent chemical adhesion with porous materials containing active hydrogen, such as foam, plastic, wood, leather, fabric, paper, ceramics and other materials with smooth surface, such as metal, glass, rubber and plastic. Polyurethane adhesive is often used in flexible packaging, automobile, construction and other industries. So, what are the bonding processes of polyurethane adhesives? 1....
Common adhesives for flexible packaging
At present, the commonly used composite adhesives in flexible packaging industry mainly include solvent-free adhesives, water-based adhesives and solvent-based adhesives. Developed countries in Europe and America attach great importance to environmental protection, and solvent-free adhesives and water-based adhesives are mainly used in the composite production of flexible packaging. In most countries in Asia and Africa, solvent-based adhesives are still the main soft packaging manufacturers....
Test method and evaluation standard system of chemical corrosion resistance of polyurethane adhesive
1.What is polyurethane adhesive? What are its characteristics? Polyurethane Adhesive (PU adhesive for short) is a kind of adhesive material with polyurethane resin as the main component. It generates high molecular polymers by the reaction of isocyanate groups with polyols or other active hydrogen compounds, thus achieving the bonding function. The following are the main characteristics of polyurethane adhesive: (1)Excellent bonding performance: it can bond metal, plastic, wood, glass and other...
Application of oily polyurethane resin in printing field
Oily polyurethane resin is widely used in printing field, and its excellent physical properties and chemical stability make it an important part of printing ink. The following is a concrete analysis of the application of oily polyurethane resin in the printing field: First, the role of ink components and resin binders Printing ink is mainly composed of resin binder, pigment (or dye), additives and solvents. As the "heart" of ink, resin binder mainly plays the role of dispersing pigments and...
The Important Role of Polyurethane Adhesive in Flexible Packaging Industry
The Important Role of Polyurethane Adhesive in Flexible Packaging Industry Polyurethane adhesive, as a high-performance adhesive material, plays an indispensable role in the flexible packaging industry. With the continuous improvement of consumers' requirements for packaging quality and the increasingly strict environmental protection regulations, polyurethane adhesive has become the preferred bonding solution in flexible packaging composite technology because of its excellent performance...
Market Applications of Waterborne Polyurethane Adhesives
Introduction Waterborne polyurethane (PU) adhesives have become a key material in various industries due to their eco-friendly properties, strong bonding performance, and versatility. As environmental regulations tighten and demand for sustainable solutions grows, these adhesives are increasingly replacing solvent-based alternatives. This article explores their market applications across different sectors. Key Market Applications 1. Automotive Industry Waterborne PU adhesives are extensively...
The Advantages of Water-Based Polyurethane Adhesives
Water-based polyurethane (PU) adhesives have become increasingly popular in various industries due to their unique properties and environmental benefits. This article explores the key advantages of using water-based PU adhesives, making them a preferred choice for many applications. 1. Environmentally Friendly One of the most significant advantages of water-based polyurethane adhesives is their eco-friendliness. Unlike solvent-based adhesives, which release volatile organic compounds (VOCs)...
The Rising Demand for Two-Component Solvent-Based Polyurethane Adhesives in the Global Market
In recent years, the global market for adhesives has seen a significant shift towards more versatile and high-performance solutions, with two-component solvent-based polyurethane (2K-PUR) adhesives emerging as a key player. This trend is driven by their superior bonding strength, flexibility, and resistance to environmental factors, making them an ideal choice for a wide range of applications across multiple industries. Market Overview According to a report by MarketsandMarkets, the global...
The Future of Food Packaging: Innovations in Polyurethane Adhesives
As smart and active packaging gains traction, next-gen polyurethane adhesives are enabling breakthroughs: Emerging Trends: Smart Labels: Adhesives compatible with RFID and freshness indicators. High-Speed Lamination: Faster curing for efficient production. Bio-Based PU Adhesives: Renewable raw materials for circular economy. The future of food packaging lies in smarter, safer, and more sustainable adhesive technologies—polyurethane continues to lead the way.
Overcoming Packaging Challenges with Polyurethane Adhesives
Flexible packaging faces challenges like delamination, moisture ingress, and chemical exposure. Polyurethane adhesives provide robust solutions for demanding applications. Problem-Solving Features: ✅ Strong Bonding: Prevents layer separation in multi-material films.✅ Chemical Resistance: Withstands oils, acids, and solvents.✅ Barrier Protection: Enhances shelf life by blocking oxygen and moisture. From stand-up pouches to vacuum-sealed bags, these adhesives ensure packaging performs under...
Sustainable Solutions: Eco-Friendly Polyurethane Adhesives for Flexible Packaging
Sustainability is reshaping the packaging industry, and eco-friendly polyurethane adhesives are leading the charge. These adhesives enable recyclable and compostable packaging structures without sacrificing performance. Green Benefits: Solvent-Free & Water-Based: Reduce VOC emissions. Compatible with Bio-Based Films: Supports PLA and cellulose-based packaging. Recyclability: Allows mono-material packaging designs. Brands seeking to meet ESG goals can leverage these adhesives to...
Ensuring Food Safety with High-Performance Polyurethane Adhesives
Food safety is non-negotiable in packaging, and polyurethane adhesives play a critical role in meeting regulatory requirements. These adhesives are formulated to resist migration, ensuring no harmful substances transfer to food products. Key Advantages: ✔ Low Migration: Minimizes risk of contamination.✔ Thermal Stability: Withstands sterilization (retort) and freezing.✔ Odorless & Tasteless: Preserves food quality. With strict global standards like FDA 21 CFR 175.105 and EU 10/2011,...
The Rising Demand for Food-Grade Polyurethane Adhesives in Flexible Packaging
The food packaging industry is rapidly evolving, with a growing emphasis on safety, durability, and sustainability. Food-grade polyurethane adhesives have emerged as a leading solution for flexible packaging due to their superior bonding strength, chemical resistance, and compliance with stringent food safety regulations. Why Polyurethane Adhesives? High Performance: Excellent adhesion to films, foils, and plastics. Food Safety: Compliant with FDA, EU, and other global standards. Versatility:...
Two-Component Solvent-Based Polyurethane Adhesive Industry Insights: Trends & Future Outlook
Industry Insights: Trends & Future Outlook Market Growth Drivers Demand from Automotive & Aerospace – Lightweight material trends (e.g., carbon fiber, plastics) drive adoption of high-performance PU adhesives. Sustainability Pressures – While solvent-based systems face scrutiny, innovations in low-VOC formulations are gaining traction. Emerging Economies – Rapid industrialization in Asia-Pacific fuels demand for durable adhesives in construction and...
Product Introduction & Industry Insights: Two-Component Solvent-Based Polyurethane Adhesive
OverviewTwo-component solvent-based polyurethane (2K PU) adhesives are high-performance bonding solutions known for their exceptional strength, durability, and versatility. Comprising a polyol (Part A) and an isocyanate (Part B), these adhesives cure via a chemical reaction, forming robust, flexible bonds resistant to environmental stressors such as moisture, chemicals, and temperature fluctuations. Key Features & Benefits Superior Bonding Performance – Offers excellent adhesion to diverse...
Application and advantages of waterborne polyurethane adhesive in automobile interior decoration
1.Application of waterborne polyurethane adhesive in automobile interior decoration Waterborne polyurethane adhesive can bond automobile interior door panels, instrument panels, ceilings, seats, carpets, rear panels, trunk covers, and other parts. Another typical application range of waterborne polyurethane adhesive is the bonding of the ceiling in a wet process. In addition, two-components waterborne polyurethane adhesive is also widely used for covering parts such as handrails in cars. 2.The...
Information about flexible packaging compound adhesive
Flexible packaging compound adhesive is a kind of material widely used in food packaging and other fields. Its main function is to bond films, papers or other substrates with different properties together through composite technology to form a composite material with a multi-layer structure. This compound adhesive is usually composed of many components, including resin, solvent, plasticizer, additives and so on. The main purpose of flexible packaging compound adhesive is to improve the...
Polyurethane adhesives classified by components
Polyurethane adhesive (foam adhesive) is divided into three types according to its components: polyisocyanate adhesive, prepolymer polyurethane adhesive and end-sealed polyurethane adhesive. 1.polyisocyanate adhesive Polyisocyanate adhesive is an early product of polyurethane adhesive composed of polyisocyanate monomer or its low molecular derivatives. As a reactive adhesive, polyisocyanate adhesive has high bonding strength and is especially suitable for bonding metals with rubber and...
Matters needing attention in storage and use of polyurethane adhesive
The storage conditions of polyurethane adhesives mainly include the following aspects: 1. Moisture-proof: polyurethane adhesive is a material with strong moisture absorption, so it should be stored in a dry and ventilated place to avoid a wet environment and moisture intrusion. It is suggested that the polyurethane adhesive stored in a humid environment should be dried before use to ensure its quality and effect. 2. Sun protection: polyurethane adhesives are prone to aging and embrittlement in...
Main points in the use of polyurethane adhesive
Polyurethane adhesive is a common and multifunctional adhesive, which is famous for its excellent adhesion and various application fields. Polyurethane adhesive plays an important role in modern industry and is widely used in bonding, sealing and repairing multiple materials and surfaces. To ensure the effectiveness and safety of using polyurethane adhesive, the following nine precautions need to be followed: 1. Appearance treatment: before bonding, the appearance of the adherend must be...
Total analysis of polyurethane adhesive and its wastewater treatment
First, the introduction of polyurethane adhesive. Polyurethane adhesive, also known as urethane adhesive, is an adhesive containing carbamate group (-NHCOO-) or isocyanate group (-NCO) in its molecular chain. It is mainly divided into two categories: polyisocyanate and polyurethane. It has high activity and polarity and can form excellent chemical adhesion with porous materials such as foam, plastic, wood, leather, fabric, paper, ceramics and other materials with smooth surfaces such as metal,...
Detailed explanation of polyurethane dry composite adhesive
Polyurethane dry composite adhesive is a kind of high-performance adhesive, which is composed of polyurethane resin, curing agent, and additives. It can form a firm bond between different materials through a special dry composite process and has excellent bonding strength and weather resistance. First, the characteristics of polyurethane dry composite adhesive 1. High bonding strength: Polyurethane dry-type composite adhesive can provide very high bonding strength and ensure that the bonded...
New energy vehicles put forward higher requirements for the dosage and performance of adhesives.
New energy vehicles put forward higher requirements for the dosage and performance of adhesives. In recent years, the wave of electrification has swept the world, and the new energy automobile industry has rapidly developed. As the core product upstream of the electric automobile industry chain, the demand for power batteries has exploded. At the same time, the market scale of adhesives has also been enlarged simultaneously. In 2022, the global tram adhesive market scale reached US$ 2.142...
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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.