PUR Hot Melt Adhesive (full name: moisture-curable reactive polyurethane hot melt adhesive) is a high-performance adhesive that is solid at room temperature and melts into a liquid upon heating. Its unique reactive curing mechanism allows it to rapidly cure under the influence of ambient moisture, forming a strong chemical structure. PUR hot melt adhesive exhibits excellent adhesion to a wide range of materials, including metals, plastics, glass, and rubber, and is widely used in fields such as lithium batteries, automotive, and home appliances.

Reasons for Using PUR Edge-Folding Adhesive in Polymer Lithium Batteries

In traditional pouch cell manufacturing, the edges of the cells are sealed with adhesive tape to maintain the cell’s appearance and dimensions, as well as to prevent external short circuits. While this method is effective, the increasing demand for higher energy density in lithium batteries has led to the gradual replacement of tape sealing with adhesive-based edge-folding processes. The adhesive edge-folding process optimizes the battery structure, improving volumetric energy density while reducing production costs. This new process not only enhances production efficiency but also increases automation levels on the production line and improves the yield of quality products.

The application of PUR edge-folding adhesive in this new process addresses the limitations of traditional edge-sealing methods in terms of stability and production efficiency, making it the preferred solution for side bonding in polymer lithium batteries.

Advantages of EUBO PUR Edge-Folding Adhesive

The main advantages of PUR edge-folding adhesive lie in its excellent high-temperature peel resistance and strong adhesion, ensuring secure bonding of battery sides even under high-temperature operating conditions and preventing bond failure. In addition, the adhesive features fast curing, low odor, and a solvent-free, environmentally friendly formulation. These properties not only meet safety and environmental standards but also enhance production line automation, reduce manual operations, and improve production efficiency and product yield.

Features of UR 6136 PUR Edge-Folding Adhesive

1. Excellent Adhesion: Provides outstanding bonding strength to various aluminum-plastic film substrates, ensuring dimensional stability of the battery.

2. High-Temperature and Weather Resistance: After curing, the adhesive maintains its strength under high-temperature conditions and exhibits excellent weather resistance, suitable for a variety of environmental conditions.

3. High Mechanical Performance: The cured PUR adhesive has good toughness, able to withstand vibration and mechanical stress, preventing bond failure due to external forces.

4. Environmentally Friendly and Solvent-Free: Formulated with 100% solid content and no solvents, compliant with environmental standards, with no harmful gas emissions, ensuring production safety.

Application Scenario:
The UR 6136 PUR adhesive is primarily used for side edge-folding bonding in polymer lithium batteries, ensuring stable cell edge sealing, preventing cell deformation or short circuits, and thereby enhancing battery safety and performance.

With the continuous development of industry, high-temperature greases are being used more widely, playing an especially important role in large-scale industrial equipment. However, during use, it is often observed that high-temperature grease gradually depletes. What causes this loss? Below, EUBO experts provide a detailed explanation.

The main causes of high-temperature grease loss include:

1. Internal Structure Degradation of the Grease
High-temperature grease, when exposed to heat and air over extended periods at friction points, can experience oxidation of the base oil and thickener, which damages the soap structure of the grease. This oxidation process causes the grease to soften, eventually leading to loss.

2. Impact of Operating Load
Continuous operation at friction points subjects high-temperature grease to constant shear stress, gradually damaging the thickener structure. Over time, the grease softens and is lost, significantly reducing its lubrication performance.

3. Environmental Factors
Metal particles generated during machinery operation can catalyze grease oxidation, producing organic acids that further compromise the stability of the grease, resulting in structural failure and loss.

These are the three main factors that lead to high-temperature grease loss. To prevent mechanical failures caused by grease depletion, high-temperature grease should be regularly inspected, replenished, or replaced. After all, the production losses resulting from equipment downtime due to lubrication issues far exceed the cost of routine maintenance.

For more information on high-performance grease products, we invite you to follow EUBO. We provide professional solutions to help your equipment operate efficiently and reliably.

With the continuous advancement of smartphone technology, major manufacturers are striving for more advanced processes and technological breakthroughs. Narrow bezel designs, as the current mainstream trend in smartphones, not only increase the screen-to-body ratio but also maximize the display area while ensuring comfortable one-handed operation. To accommodate increasingly thinner bezels, the requirements for adhesives in smartphone assembly have been steadily rising. EUBO’s UR 6140 PUR hot melt adhesive, with its excellent bonding performance, has become a key supplier in the assembly of smartphone frames for many well-known brands.

EUBO Hot Melt Adhesive in Smartphone Frame Applications

EUBO’s UR 6140 hot melt adhesive provides a reliable bonding solution for smartphone frame assembly. The UR 6140 adhesive not only delivers stable and strong bonding even in ultra-narrow bezel spaces, but also meets a wide range of design requirements.

This adhesive is suitable for bonding a variety of materials, including plastics, metals, and glass, and features rapid curing and strong initial tack, allowing bonds to be completed within minutes and significantly shortening production time. It also offers excellent high- and low-temperature resistance, solvent resistance, and impact resistance, ensuring reliable bonding even under extreme environmental conditions. These properties make the UR 6140 hot melt adhesive capable of meeting the increasingly stringent design requirements of smartphone frames while effectively improving production efficiency.

Multi-Scenario Applications of Hot Melt Adhesive in Smartphone Frames

? Plastic-to-Metal Frame Bonding: Provides strong adhesion for smartphone frames and components combining plastic and metal.

? Side Keys and Buttons Bonding: Ensures stability of side keys and buttons, unaffected by external forces.

? Camera and Speaker Component Bonding: Effectively protects cameras and speakers from external impact while maintaining their stability.

? Screen-to-Frame Sealing: Can be used for sealing screens to frames, enhancing the smartphone’s water and dust resistance.

Product Features of EUBO PUR Hot Melt Adhesive

① Excellent Weather Resistance: The PUR hot melt adhesive can withstand various environmental conditions, ensuring smartphone stability under different temperatures and humidity levels.

② Low Shrinkage and High Initial Tack: After curing, the adhesive maintains dimensional stability and provides strong initial tack, keeping components securely in place within a short time.

③ Single-Component, Reactive Hot Melt Adhesive: No mixing required, with a simple and convenient curing process for ease of use.

④ Rapid Curing: Fast curing at low temperatures, moisture-curing of the adhesive layer ensures strong initial bonding and high process efficiency.

⑤ Environmentally Friendly and Solvent-Free: Compliant with environmental standards, safe and non-toxic, suitable for modern production requirements.

In smartphone design and manufacturing, …

During the bonding and assembly of smartphone frames, EUBO PUR hot melt adhesive has demonstrated excellent performance through drop tests, tumble tests, and high- and low-temperature shock tests. The adhesive not only meets the requirements of narrow-bezel smartphone designs but also significantly improves production efficiency and reduces costs, helping manufacturers create more stable, durable, and aesthetically pleasing products.

Smart wearable devices, such as smartwatches, fitness bands, smart rings, smart glasses, and health monitoring wristbands, are evolving toward lightweight, miniaturized, and high-performance designs. These products not only require precise data collection and interactive functions but also need to offer waterproofing, sweat resistance, wear resistance, and weather resistance for long-term use. In the assembly process, adhesives play a key role in ensuring structural stability and sealing protection. EUBO PUR hot melt adhesive, with its excellent adhesion and environmental adaptability, can meet the demands of smart wearable devices for miniaturization, high precision, and high performance.

Applications in Smart Rings

Application Areas: Securing micro batteries, sealing between the outer casing and inner liner, and bonding the induction coil assembly.

Advantages of EUBO PUR Hot Melt Adhesive: It supports high-precision dispensing in extremely small gaps. Once cured, it provides strong adhesion with excellent chemical resistance, capable of withstanding sweat, cosmetics, and other corrosive substances, ensuring long-term reliability.

Applications in Smart Glasses and Other Wearable Devices

Application Areas: Securing the frame structure, bonding the touchpad, and sealing micro batteries and modules.

Advantages of EUBO PUR Hot Melt Adhesive: It enables dispensing with micron-level precision, ensuring the integrity of thin and lightweight structures. It also provides waterproof, sweat-resistant, and dust-proof performance, making it suitable for long-term wear and outdoor use.