What is EVA hot melt?

EVA hot melt was at the beginning of a small adhesive revolution, as the first form of hot melt. It offers the following advantages as an alternative to solvent-based adhesives or water-based adhesives, for example.

  • Solvent-free (no volatile solvents)
  • Provides fast adhesion (approx. 1 second)
  • Adheres to a variety of materials such as glass, cardboard, wood & metal.
  • Relatively cheap
  • Easy to formulate; Build in properties for specific applications

The formulation of an EVA hot melt

EVA hot-melt is an adhesive and usually a mixture of 3 components

  • EVA polymer; The spine
  • Wax (Hot melt wax); workability, short pressing time
  • Resin; improved adhesion range

Hot melt is solid at room temperature. The adhesive generally melts at approx. 110 ° C and is usually processed at approx. 160 ° C.

What is EVA hot melt used for?

EVA hot melts are the first generation of hot melt adhesives that have replaced many solvent and water based adhesives since the 1960s. The most famous applications are:

  • Closing cardboard boxes
    • Packaging applications
    • Food packaging
    • Corrugated cardboard
    • Solid Cardboard
    • Duplex cardboard
  • Production of shoes
  • Textile bonding
  • Gluing glass
  • Gluing metal
    • White goods assembly
  • Gluing wood
    • Edge glue
    • Lamination
    • Product Assembly
  • Filter industry
    • Filter pleating
    • Housing assembly
  • Nonwoven glues
  • Bookbinding
    • Back glue
    • Side glue
    • Covers
  • Mattresses and foam sheet linings
  • Automotive applications
    • Interior extensions
    • Sealing / seals

Are there more types of hot melts?

Following the success of EVA hot melts, various other types have been developed with specific properties, such as:

  • Polyolefin, better adhesion, better adhesion at high and low temperatures
  • PSA, self-adhesive hot melts for the production of eg duct tape and self-adhesive labels
  • PUR, for more structural applications, in wood and construction.

Are there any more options with hot melt?

Hot melt polymers are compatible with a wide variety of chemicals. To this end, they can also be assigned very specific properties.

Fillers in hot melt

Fillers are mainly added to lower the price, when a high adhesive volume is required to glue on irregular surfaces. Fillers are also used to make the hot melt less viscous or to give the hot melt a certain color so that the glue is less noticeable.

Dyes in hot melt

Hot melt adhesives can be colored well, sometimes in combination with fillers. Pure dyes and pre-mixed colors hot melt can be supplied.

UV stabilizers

For specific applications it may be desirable that the hot melt is protected from sunlight, so that the hot melt adhesive bond also remains good during prolonged, direct exposure to sunlight.

UV, optical brighteners

For glue detection applications, UV illuminants can be added to the hot melt. This may be required to guarantee the quality of products, or to be able to perform a quality control, in which it must be demonstrated that sufficient adhesive has been used.

Food contact

Many hot melts can comply with regulations for, for example, use in combination with food, such as the packaging of food. Thus, depending on the specific adhesive type, FDA, EU and BRC regulations can be met.

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