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Hot Melt Adhesives in Production
What are adhesives?
"Adhesives" are defined as materials that adhere simply through
pressing together the parts of the joi...
Hot Melt Technology Now
Today, hot melt adhesives are used in a variety of manufacturing
processes, including packaging, b...
Hot Melt Technology Now
Some of these adhesives have been accepted in
many manufacturing industries, where they can be
app...
Uses & Properties
Hot melt adhesives are used primarily for
packaging, textiles, labels, tapes, and other
pressure sensiti...
Hot Melt Processes
Hot melt production is a continuous process. In most
cases a compounder is used to produce a
homogenous...
Feedrates and Ingredients
The typical throughput ranges are 100 - 1000 kg/hr,
(220 - 2200lb/hr).
Depending on the recipe a...
High Accuracy Requirements
There are tough performance requirements on the
various types of hotmelts with regard to workin...
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Hot Melt Adhesives in Production

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Indemax has been manufacturing high quality hot melt replacement parts for over 36 years. Their parts fit all major brands. They also restore hot melt machines so you can get more value out of your investment. To see their line of products, shop their catalog or find more information, visit http://www.indemax.com

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Transcript of "Hot Melt Adhesives in Production"

  1. 1. Hot Melt Adhesives in Production
  2. 2. What are adhesives? "Adhesives" are defined as materials that adhere simply through pressing together the parts of the joint which requires bonding. At room temperature, they demonstrate a lasting and permanent bonding. Hot melt adhesives are solvent-free adhesives. This means that they are solid at temperatures below 180°F (82°C), become low viscosity fluids above 180°F, and set rapidly upon cooling. Prior to the development of hot melt adhesive technology, molten wax was used for bonding. When molten wax was no longer an effective solution, thermoplastic systems were introduced. Hot melt technology stemmed from this evolution.
  3. 3. Hot Melt Technology Now Today, hot melt adhesives are used in a variety of manufacturing processes, including packaging, bookbinding and product assembly. There are a number of hot melt adhesives in use, with the most common being those used for hot melt pressure sensitive adhesive applications: • Ethylene vinyl acetate (EVA) copolymers, compatible with paraffin, the original hot melt • Styrene-isoprene-styrene (SIS) copolymers • Styrene-butadiene-styrene (SBS) copolymers • Ethylene ethyl acrylate copolymers (EEA) • Polyurethane reactive (PUR) For the most part, additives like resins, waxes, antioxidants, plasticizers and other materials are combined with these polymers so that they can exhibit a full range of performance.
  4. 4. Hot Melt Technology Now Some of these adhesives have been accepted in many manufacturing industries, where they can be applied in small bond points to eliminate use of mechanical fasteners, like staples, screws, rivets, clips, snaps, nails or stitching.
  5. 5. Uses & Properties Hot melt adhesives are used primarily for packaging, textiles, labels, tapes, and other pressure sensitive applications, disposable products, stamps, envelopes and product assembly processes. Common household products like diapers and disposable pads are made from hot melt technology, along with a significant amount of food packaging.
  6. 6. Hot Melt Processes Hot melt production is a continuous process. In most cases a compounder is used to produce a homogenous melt. After plasticizing/masticating and compounding the various rubbers, the resins (solid or liquid) and softeners/oils are added downstream. For larger quantities, the liquid can be fed at several locations along the extruder, using multiple kneading and homogenizing stages.
  7. 7. Feedrates and Ingredients The typical throughput ranges are 100 - 1000 kg/hr, (220 - 2200lb/hr). Depending on the recipe and number of ingredients, typical feed rates are: • Elastomers: 30-50% • Resins: 20 - 40% • Softeners / Oils: 10 - 40% • Fillers: 1 - 10% • Color pigments: 0.1 - 3%, Stabilizers: 0.1 - 3%
  8. 8. High Accuracy Requirements There are tough performance requirements on the various types of hotmelts with regard to working load and types of stress on the joints, temperature, range, lifetime etc. Typically there is a rather short residence time (as little as 10 - 20 seconds) in the extruder's mixing zone.To ensure constant high quality of the end product, a continuous high feeding accuracy is required for the additive feeders
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