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Types of hot melt adhesives

Hot melt adhesive is short for hot melt adhesive. It does not use any solvent during production and application, is non-toxic, odorless, and does not pollute the environment. It is known as "green adhesive" and is especially suitable for use in continuous production lines.

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1. Hot melt adhesive for fabric
Mainly used in the production of clothing, shoes, hats, dustproof, moisture permeability, protection and furniture. Clothing using the glue not only has a crisp and plump appearance quality, but also has the characteristics of natural flatness after washing and can be worn without ironing. Shoes and caps using the glue are light and breathable, have good shape retention, are especially used in the shoemaking industry, and have the advantages of comfortable wearing and reduced shoe odor. The technical indicators of the hot melt adhesive for this purpose are as follows: Appearance: white or yellowish granular or powder. Melting point: 105-115℃; Melt index: 18-22G/10Min(160℃); Bulk density: 0.48-0.52G/CM3; Angle of repose: 30-35 degrees; Adhesion strength: ≥1.5-2.0KG/25MM ; Washing resistance: ≥ 5 times. Such hot melt adhesives can be divided into polyamide (PA), polyester (PES), polyethylene (LOPE and HDPE) and polyester amide (PEA), etc. This type of adhesive has been identified by five achievements and completed the "Seventh Five-Year Plan". "Tackling key problems, Hebei Province's "Eighth Five-Year Plan" project, won the Invention Award, Tianjin City, Hebei Province Science and Technology Achievement Award each, and won three invention patents.
2. Hot melt adhesive for packaging and bookbinding
At present, the packaging and sealing of food, beverages, instant noodles, cigarettes, beer, medicine, etc., are mostly completed by hot melt adhesives through a sealing machine. The book binding industry has now abolished the old thread and staple binding and replaced it with hot melt adhesive technology, which not only improves the binding quality, but also greatly speeds up the binding speed. The technical indicators of the hot-melt adhesive for this purpose are as follows: Appearance of books and periodicals for packaging White granular light yellow flake Melting point (℃) 70-84 65-78 Viscosity 1800-3500 5500-6500 Hardness 78-82 65-75 Curing speed 3-5 0 -20
3. Hot melt pressure sensitive adhesive
Mainly used for women's sanitary napkins, children's diapers, sick mattresses, elderly incontinence products, etc. Especially the latter, with the continuous aging of my country's population structure. The demand for elderly incontinence products will increase rapidly in the future. The technical indicators of the hot melt adhesive for this purpose are as follows: Appearance: white or yellowish block viscoelastic, solid Melting point: 80-90℃ Adhesion strength: 2.0-2.5lG/25MM Hygiene requirements: odorless, non-toxic and non-irritating to the skin.
4. Multipurpose solvent-based hot melt adhesive
In the production of many products, such as: hot melt transfer printing, liquid crystal material sealing, wallpaper anti-counterfeiting, calligraphy and painting pasting, computer printing, food production date typing, wire and cable coding, etc. Some granular or powdered dosage forms do not need to be made into a liquid in the presence of a suitable solvent, and coated on a certain substrate to obtain a thin and uniform film, which can be used in the production of the subsequent process. Due to the different types of solutes (hot melt adhesives), solvent-based hot melt adhesives for various purposes can be prepared.
5. Hot melt adhesive for edge sealing of furniture
Our country lacks wood. Except for a small amount of furniture that uses solid wood, most general-purpose furniture is made of fiberboard, shavings or sawdust board, and the edge of the furniture board must be bonded with hot melt adhesive to increase the beauty, just like solid wood furniture. . The technical indicators of the hot melt adhesive for this purpose are as follows: Appearance: white or yellowish granular or rod-like. Melting point: 70-84℃; Viscosity: 45000-75000(180℃) Relative hardness: 70-80%; Curing speed: 8-12 seconds.

Post time: Jul-07-2022