What is the difference between hot melt and acrylic adhesive?
Adhesives have come a long way since their earliest uses in ancient times. Nowadays, there are a variety of adhesives that can be used for different applications, whether it''s for household repairs, crafting, or industrial purposes.
Two common types of adhesives used today are hot melt and acrylic adhesive. These two adhesives may seem similar at first, but they actually have many differences. In this article, we will explore the differences between hot melt and acrylic adhesive.
Definition
Hot melt adhesive is a type of thermoplastic adhesive that is solid at room temperature and melts to form a liquid when heated. This adhesive is commonly used for bonding plastics, wood, paper, textiles, and other materials.
Acrylic adhesive, on the other hand, is a type of pressure-sensitive adhesive that is made from acrylic polymer. These adhesives become sticky when pressure is applied and are commonly used for bonding plastics, metals, and other materials.
Composition
Hot melt adhesive is typically made from a combination of thermoplastic resin, wax, and other additives. These materials are heated until they melt and then applied to the surface, where they solidify and form a bond.
Acrylic adhesive is made from a mixture of acrylic polymers, solvents, and other additives. These materials are mixed together to form a liquid adhesive, which is then coated onto a backing material. When pressure is applied, the adhesive sticks to the surface.
Application
Hot melt adhesive is typically used in industrial applications, such as packaging, labeling, woodworking, and automotive manufacturing. This adhesive is often applied using a hot melt glue gun, which heats the adhesive to a liquid state and then dispenses it onto the surface.
Acrylic adhesive is commonly used for bonding materials in a variety of industries, including automotive, construction, and electronics. These adhesives are often applied as tape, which can be cut to size and applied directly to the surface.
Strength
Hot melt adhesive typically has a strong bond, but its strength can vary depending on the materials being bonded and the conditions to which the bond will be exposed. This adhesive can withstand high temperatures, making it ideal for use in applications where heat is a factor.
Acrylic adhesive also has a strong bond and can withstand a variety of conditions, including high temperatures, moisture, and UV exposure. This adhesive is ideal for use in applications where durability is important.
Appearance
Hot melt adhesive dries clear and leaves no residue, making it ideal for use in applications where appearance is important.
Acrylic adhesive can dry either clear or with a slight yellow tint, depending on the specific adhesive used. Some acrylic adhesives can leave a residue when removed, which can affect the appearance of the underlying surface.
Cost
Hot melt adhesive is typically less expensive than acrylic adhesive, making it a popular choice for industrial applications where cost is a concern.
Acrylic adhesive is often more expensive than hot melt adhesive, but its durability and strength make it a popular choice for applications where cost is less of a concern.
Conclusion
Hot melt and acrylic adhesives are two of the most commonly used adhesives today. While they may seem similar at first, they actually have many differences in terms of composition, application, strength, appearance, and cost.
As with any adhesive, it''s important to choose the right one for the task at hand. Consider the materials being bonded, the conditions to which the bond will be exposed, and the overall requirements for the job when selecting an adhesive. With the right adhesive, you can ensure a strong bond that lasts for years to come.