Astro Adhesives

Polyamide hot melt adhesives are used in a variety of bonding applications. Polyamide hot melts have a wide range of adhesive properties, they exhibit excellent adhesion to a wide variety of materials, and bond well to porous substrates. Polyamide hot melt adhesives are used in a variety of critical applications. Most polyamide glues possess a broad range of adhesive properties, exhibit excellent adhesion to a wide variety of materials, and bond well to porous substrates. They also demonstrate good chemical and oil resistance, and show good adhesion over a wide range of service temperatures. See our Applications pages for information about the other hot melt adhesives we offer. The characteristics of Polyamide Hot Melt Adhesive are heat resistance and grade flame retardant.
 

POLYAMIDE ADHESIVES

A polyamide is a polymer containing monomers of amides joined by peptide bonds. They can occur both naturally and artificially, examples being proteins, such as wool and silk, and can be made artificially through step-growth polymerization or solid-phase synthesis, examples being nylons, aramids, and sodium poly(aspartate). Polyamides are commonly used in textiles, automotives, carpet and sportswear due to their extreme durability and strength.
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This raw material report defines polyamides as typically condensation products of a dianhydride or dimer acid and primary diamine. Low molecular weight reactive polyamides, commonly used as hardeners in 2-part epoxy adhesives, and very high molecular weight polyamide polymers, such as nylon, used in specialty epoxy film adhesives are included under Raw Material (Epoxies).

Thermoplastic polyamides are usually produced via the reaction of the dimer acid (polymerized fatty acid) and a diamine, usually ethylene diamine. The three principal markets for this type of polyamide are adhesives, printing inks, and reactants for epoxies. The adhesive market utilizes a hydrogenated dimer acid in order to obtain thermal stability. The printing ink industry uses a soluble polyamide, while epoxies require a highly reactive polyamide. The pale yellow liquid found in most 2-part epoxies in End Use (Do-It-Yourself Products) is a reactive polyamide. Nylons are also polyamides, but are not made from a dimer acid.
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PRODUCT RANGE 

  • Our Polyamide Hot Melt Adhesives Offer the following benefits:
  • Aggressive Bonds - Bonds to a wide range of critical, difficult to Bond, Low energy substrates.
  • Low/No Odor, No smoke, offers a more operator-friendly work environment.
  • Clean Machining - High performance. Reduce equipment maintenance and unscheduled downtime.
  • High temperature resistance
  • Increased Mileage, Lowers adhesive usage and costs, depending on application.
  • Adhesion to plastics
  • Reduced Char, No clogged lines or nozzles and no adhesive buildup in the tank, reduced maintenance costs.
  • Increased hardness No Stringing, Tailing - Reduces downtime.

APPLICATIONS

There are several major applications of Polyamide Hot Melt Adhesive:
  • Automobiles, heat resistant glue stick, wire fixing, component bonding, fiber bonding
  • Low-pressure injection forming: sealing, cable, cell phone battery, connector
  • Woodworking, Cabinet & Furniture Assembly
  • Vinyl, Plastics & ABS
  • Shoes industries, shoe toe puff adhesive, upper vamp bonding adhesive, lasting adhesive
  • Filter Assembly, Electrical Potting
  • Electronics, Electrical Industry, hot melt glue stick, electronic Components fixing, planar, jumper cable fixing, filling
  • Woods, Vinyl, ABS & PVCs

MANUFACTURERS

These manufactures carry polyamide glue product lines:
  • Astro Packaging
  • H.B. Fuller
  • Henkel
  • Bostik
  • IFS DURAPro
  • Jowat
  • Forbo Swift

POLYAMIDE HOT MELT ADHESIVE

Always keep polyamide hot melt sealed in an air-tight container when not in use. Most polyamides, particularly the dimer acid polyamides, are prone to oxidation and must be stabilized by antioxidants. Although the stabilizers will vary with the polyamide, the most common antioxidants that are used are hindered phenols, phosphites, phosphates, and hindered aromatic amines. Even with chemical stabilization, it is important to keep polyamide glue sticks and pellets sealed in an air-tight package between uses. Polyamide hot melts offer great chemical and oil resistance, and provide strong bonds over a wide range of operating temperatures. For ultra high demand gluing projects such as high temperature environments, metal to metal, or any non-porous to non-porous requirement, Ultra-Tac polyamide glue is widely regarded as the best in all regards. There is no other glue on the market which is stronger over a wider range of conditions than Ultra-Tac.