Polyurethane hot melt, commonly called PUR hot melt, is an adhesive that is heated and dispensed from a cartridge or slug using a heated gun or piece of bulk dispensing equipment. In comparison, traditional hot melt comes in stick or pellet form. PUR is also unique because it solidifies through moisture in the air to form a strong bond that will not re-melt.
Because of its strength, durability, and fast set time, PUR is ideal for a wide variety of applications in woodworking, finish carpentry, shoe repair, furniture repair, broken glassware repair, laminate countertops, construction and remodeling, and more. It is also simple to dispense, cost effective and bonds to a lot of different substrates.
Advantages of PUR Hot Melt Adhesive Modified Trace-less
Good stability
Ordinary hot burn adhesives in order to an audio state after being heated and melted to a liquid express, as well as the PUR hot burn adhesives will vary, which further causes an irreversible a effect to create a crosslinked compound. Therefore, the soundness of PUR hot melt adhesive is any better than that of ordinary hot melt adhesive.
The use temperature is low
Compared with ordinary hot melt adhesives, PUR hot melt adhesives can be used at relatively low temperature ranges, thereby effectively avoiding the concern of heat deformation during the process of the transparent clear plastic packaging box.
Other performance advantages
In relation to the response basic principle of Pur Hot Melt Glue, it could be formed to make a polymer film with good cohesive strength after combination- linking reaction with wetness in air, in order that PUR hot melt adhesive is solvent resistant and aging resistant on the other hand with ordinary hot melt glue. The performance is very good , and the low temperature amount of resistance and high temperature resistance of PUR hot melt adhesive products are superior to ordinary hot melt adhesives. Table 1 analyzes the performance of PUR hot melt adhesives with common hot melt adhesives.
Fast bonding
Hot melt adhesives bond quickly, leading to improved production efficiency in manufacturing processes.
Versatility
Hot melts can adhere to various substrates, including plastics, paper, wood, metal and textiles, providing flexibility in application.
Environmental advantages
Hot melt adhesives are eco-friendly as they contain no solvents or volatile organic compounds (VOCs), reducing their environmental impact.
Hot melt adhesive is a solvent-free solid adhesive made by melting and mixing thermoplastic resin or thermoplastic elastomer as the main component, adding plasticizer, tackifying resin, antioxidant, flame retardant and filler.
EVA hot melt adhesive has great cohesion and low molten surface tension. It can bond with almost all substances and has excellent chemical resistance, thermal stability, weather resistance and electrical properties.
Hot Melt Adhesive PUN Nature Color
PUN hot melt adhesive is an excellent product designed for furniture and cabinets that require high-end finishing. The PUN nature color adhesive is half transparent yellow color or half transparent before sealing, it makes the furniture a sleek and modern look.
It depends on the temperature first, if you're manufacturing the high end furniture, EVA 8001 A would be a nice choice, if higher quality is needed, trace-less grade A and PUR trace-less modified would be perfect choice.
Hot Melt Adhesive Trace-less Grade A
Trace-less grade A is another type of EVA hot melt adhesive, the core advantage of this type is trace-less as the name shows, after the edge banding tape sealed on the plate edge, the adhesive layer would not be seen, it is used for furniture and cabinets that require high-end finishing. It seals tight and not easy to crack.
PUR Hot Melt Adhesive Modified Trace-less
The PUR modified hot melt adhesive is a high-quality adhesive, it is in granulated shape with white color and in plastic packing. This adhesive is perfect for use in high-end furniture and cabinets, providing an excellent solution for sealing.
EVA hot melt adhesive is a solvent-free, water-free, 100% solid fusible polymer. It is solid at room temperature and becomes a liquid adhesive with a certain viscosity when heated and melted to a certain degree.
Why Choose Us
Stable quality
Our edge banding tape products are backed by years of experience and a commitment to excellence.
Long warranty
We are confident in the quality of our products and are willing to provide you with long-term technical service support.
One-stop services
We have 30+ staff in the operation team, elites are gathered to provide one-stop services in a diversified model.
Oem and odm service
We offer customizable options to meet your specific needs and requirements.
Ethylene vinyl acetate (eva)
Eva hot melt adhesive is a widely used and versatile type. It combines ethylene and vinyl acetate to create a material with excellent adhesion properties. Eva hot melt adhesives are commonly employed in packaging, woodworking, and bookbinding due to their strong bond, flexibility, and ease of use. These adhesives are known for their ability to adhere to various surfaces, making them suitable for a wide array of applications.
Amorphous poly alpha olefin (apao)
Apao hot melt adhesives are characterized by their high heat resistance and their tacky, soft and flexible texture. They are often used in automotive manufacturing and product assembly for their ability to withstand extreme temperature fluctuations and bond difficult substrates, such as plastics and foam. Apao hot melts also provide resistance to acids, alkalis and many solvents.
Polyamide (pa)
Polyamide hot melt adhesives are known for their superior resistance to high temperature, oil and chemicals. They can reliably bond many types of substrates, including paper, wood and metal. They can also be used on plastics, such as treated polypropylene and polyethylene. Pa hot melt adhesives find application in the woodworking, electrical and automotive assembly. Their robust nature and reliability make them a top choice for demanding applications.
Polyurethane (pur)
Polyurethane hot melt adhesives are prized for their excellent thermal stability, quick setting and great flexibility. They are extensively used in industries such as furniture making, product assembly, and construction. The ability to bond dissimilar materials, coupled with their fast curing and their resistance to temperature extremes, makes pur hot melts the preferred choice in many high-performance applications.
Polyethylene
Polyethylene hot melt adhesives are well-suited for the packaging industry, particularly in the bonding of porous substrates such as carton. This adhesive type excels in moderate temperature ranges and situations where flexibility is not a primary concern. Polyethylene hot melt adhesives offer several advantages, including remarkable pot life stability and a lack of tendencies to char or produce unpleasant odours. Their characteristics make them a popular choice in the packaging of food, beverages, and consumer goods.
Metallocene
Metallocene-based hot melt adhesives are lighter and less voluminous compared to other types. Metallocene optimizes bead size, using a third less material while still forging a robust bond, enhancing product longevity. This precision extends to application control, ensuring consistent bead size and quality. Furthermore, metallocene hot melt adhesives can withstand extreme temperatures, making them ideal for various applications, from refrigerated food packaging to microwavable products.
Application of PUR Hot Melt Adhesive Modified Trace-less
Woodworking
Polyurethane adhesive (PUR) are ideal for bonding wood products, and used for edgebanding wood panels, laminating plywood, assembling furniture, and veneering wood surfaces. Also employed in bonding cabinetry and other wood products.
Product assembly
Polyurethane adhesive (PUR) are applied in the assembly of appliances, electronics, furniture, and various car parts and interiors(including interior trim, dashboards, and airbags).
DAutomotive manufacturing
PUR adhesives are used in automotive manufacturing to bond a variety of materials, including plastics, metals, and fabrics. They are used to assemble interior and exterior components, such as dashboards, door panels, and headliners.
Construction
Polyurethane adhesive (PUR) used in construction for sealing windows and doors, roofing, flooring installation, and bonding insulation and other building materials.
Packaging
Polyurethane adhesive (PUR) used for sealing cardboard boxes and other packaging materials, as well as for bonding labels and packaging components.
Other applications
Polyurethane adhesive (PUR) utilized in various applications such as shoe repair, bookbinding, medical device assembly, and filter manufacturing.
Components of PUR Hot Melt Adhesive Modified Trace-less
Polymers give the adhesive its main properties, flexibility and strength. The polymers make the hot-melt adhesive durable and capable of maintaining a bond.
Resins make the adhesive feel ''wet'' and provide the primary bond between the two surfaces.
Plasticizers alter the viscosity (thickness and fluidity) of the adhesive and ease application.
How the PUR Hot Melt Adhesive Modified Trace-less Works
Melting
The PUR hot melt adhesive is heated until it becomes liquid. This is usually achieved with the help of special hot melt equipment, such as a hot melt gun or system. The temperature at which the glue melts varies depending on the type of PUR hot melt adhesive used.
Applying
After the PUR hot melt adhesive is melted, it is evenly applied to the surface to be bonded. This can be done manually with a hot melt gun or automatically with special equipment, depending on the application.
Solidification
When used, the PUR hot melt adhesive begins to cool and solidifies quickly. This creates a strong bond between the materials being bonded together.
Some of the properties of hot melt adhesive change depending on the material on which it's applied. Some vary with the temperature of the surroundings. Here are four of its main chemical properties.
Melt viscosity
Melt viscosity is a temperature-dependent property that affects how well the adhesive spreads and its wetting ability. It is lower at higher temperatures.
Melt flow index
Melt flow index (mfi) is a measure of how well the glue flows as it is extruded. The mfi increases as both the molecular weight and viscosity of the hot melt adhesive decrease and vice versa. An adhesive with greater mfi flows easily, but its strength, flexibility, and other mechanical properties are lowered.
Pot life stability
Pot life stability indicates how long the hot melt adhesive can be kept in a molten state without degrading. It goes by several other names, including aging performance, heat stability, and thermal stability.
Bond-formation temperature
The temperature below which the adhesive does not sufficiently wet the substrate is the bond-formation temperature. It is essential because good wetting of the substrate helps to produce high-quality bonds.
How to Maintain PUR Hot Melt Adhesive Modified Trace-less
Regular system inspections
Perform routine inspections of your hot melt adhesive system, including the glue gun, hoses, and nozzles. Any clogged or worn parts will severely affect performance. Prompt replacement of damaged parts will maintain the efficiency of your system.
Use high-quality adhesives
Investing in high-quality hot melt adhesives that are suitable for your specific application can prevent many problems. When selecting an adhesive, consider factors such as high temperature resistance, bond strength, and substrate compatibility.
Adequately train operators
Ensure that operators operating hot melt adhesive equipment are adequately trained. It is critical to understand proper setup, operation, and maintenance procedures. This will not only increase the efficiency of your process, but also reduce the risk of equipment failure.
Color
If there is no special requirement for color, yellow PUR hot melt adhesive is recommended. Generally speaking, the adhesion of yellow PUR hot melt adhesive is stronger than that of white PUR hot melt adhesive.
Surface treatment
Like other types of adhesives, PUR hot melt adhesive does not require perfect surface treatment of the substrate. However, cleaning the dust and oil on the substrate helps PUR hot melt adhesive to bond well with the object.
Opening time
High operating speed is one of the main characteristics of hot melt adhesive machines. Industrial PUR hot melt adhesive usually forms a strong bond within 15 seconds. In order to adapt to the continuous improvement of technology, the opening time of PUR hot melt adhesive is getting shorter and shorter. For example, the opening time of book binding applications and speaker manufacturing is about 5 seconds.
Temperature resistance
PUR hot melt adhesive is sensitive to temperature. When the temperature reaches a certain level, PUR hot melt adhesive begins to soften. When the temperature drops to a certain temperature, PUR hot melt adhesive modified traceless will become brittle. Therefore, the working environment should be considered when choosing PUR hot melt adhesive modified traceless.
Adhesion
The adhesion of PUR hot melt adhesive modified traceless is divided into early adhesion and late adhesion. The consistency of adhesion is the premise for the good stability between PUR hot melt adhesive modified traceless and the substrate. During the production process, PUR hot melt adhesive modified traceless should have antioxidant, halogen resistance, acid and alkali resistance and plasticity. The adhesion requirements of PUR hot melt adhesive modified traceless to different objects should be adjusted according to the material of the substrate, so different PUR hot melt adhesive modified traceless should be selected according to the substrate.
Changing PUR Hot Melt Adhesive Modified Trace-Less
Step one
First of all the adhesive should be removed from the system as much as possible. De adhesive tank can be drained by using the drain point. Take the necessary precautions because of the release of hot adhesives. It is recommended to check the main filter for excessive pollution. If the filter is heavily polluted it needs to be changed. hot melt changing testing another type
Step two
When the tank is empty, the whole system needs to be set on a low temperature. A temperature around 20 – 30 degrees beyond the melting point of the new hotmelt can be maintained. This is called the 'Ring & Ball Temperature'. After this the tank is ready to be filled with the new hotmelt.
Step three
In order to prevent the existing pollution in the system (burnt particles etc.) to reach the small channels of the nozzles and cause blockages, it is recommended to disconnect the tubes.
When the new is hotmelt has melted in the tank, the rinsing of the tubes can be started.
Because the new adhesive has a higher viscosity at low temperature, the present old adhesive is pushed out of the tubes. A higher pump pressure is required.
Step four
When the rinsed hotmelt that is released at the end of the disconnected tubes looks clean and consistent, the system must be depressurized and the nozzles can be assembled.
Step five
If there are 'in-line' filters placed before the nozzles it is recommended to renew those. After assembly of the nozzles they should be rinsed as last with the new hotmelt.
Coming into contact with molten hot melt adhesives can cause sever burns. These adhesives reach temperatures in between 250°f to 420°f. This is plenty hot enough to cause sever damage to your skin. At temperatures as low as 160°f, third degree burns can occur).Both the hot melt gun and the hot melt adhesive itself have the potential to burn. It is advisable to ensure protective, heat resistant gloves are warn to avoid any unnecessary injury.
Take the time to check equipment over to ensure there is no damage before use. Any damaged electrical equipment should be treated as a potential hazard.
Removing adhesive from surfaces can be a difficult job. For this reason, taking the time to prepare and protect the work area prior to use is advisable.
Never leave equipment unattended whilst switched on.
Keep the hot melt glue gun away from flammable materials as well as wet or messy surfaces.
Do not tilt the hot melt gun nozzle upwards or attempt to use on overhead jobs.
Our Factory
SINODA is registered in 2010, it is a modern manufacturer of customized edge banding and edge adhesives specified in R&D and sales, Over the years, the company has been committed to producing same-color, environmentally friendly edge banding banding and edge banding glue for panel furniture, whole-house customization, office furniture, door factory supporting etc. The products from SINODA meet high standards and requirements in terms of quality, color, brightness or the use of adhesives are environmental, healthy and non-pollution.
Under the leadership of president Dong Bei, SINODA has pioneered the path of 'high quality, simplicity and high quality' adheres to the high-quality product route, continuously develops and innovates, and creates high-end quality.
At the same time, SINODA also adheres to the creed that 'the growth rate of employees must exceed the growth rate of the company, it will never be slacken in shaping and building its own team, improve the service system, enhance the service capabilities and be at the forefront of the industry'.
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