Hot melt adhesive is the abbreviation of hot melt adhesive. It does not use any solvent in production and application. It is non-toxic, tasteless and does not pollute the environment. It is known as "green adhesive", especially suitable for continuous production line.

1. Hot melt adhesive for fabric

Mainly used in the production of clothing, shoes and hats. The clothing with the adhesive not only has a crisp and full appearance quality, but also has the characteristics of natural flatness after washing and wearing without ironing. The shoes and caps made of this glue are light and airy, and have good shape retention. It is especially used in the shoemaking industry. It also has the advantages of wearing comfortable and reducing the smell of shoes. The technical specifications of the hot melt adhesive for this purpose are as follows:

Appearance: white or yellowish granular or powdery.

Melting point: 105-115 ℃; melt index: 18-22g / 10min (160 ℃);

Loose density: 0.48-0.52g/cm3; rest angle: 30-35 degrees;

Bonding strength: ≥ 1.5-2.0kg/25mm; washability: ≥ 5 times.

This kind of hot-melt adhesive can be divided into polyamide (PA), polyester (PES), polyethylene (lope and HDPE) and polyester amide (PEA). This kind of adhesive has passed five achievements appraisal, completed the national "Seventh Five Year Plan" and Hebei "Eighth Five Year Plan" research projects, and won one national invention award, one Tianjin and three Hebei Science and technology achievement awards, and three national invention patents.

2. At present, hot-melt adhesive is used for packaging and bookbinding of food, beverage, instant noodles, cigarettes, beer, medicine, etc. most of the packages are sealed with hot-melt adhesive through the sealing machine. The book binding industry has abolished the old line and nail binding and changed to hot-melt adhesive bonding technology, which not only improves the binding quality, but also greatly accelerates the binding speed. The technical specifications of hot melt adhesive for this purpose are as follows:

Packaging book publishing

Appearance white granular light yellow flake

Melting point (℃) 70-84 65-78

Viscosity 2500-3500 5500-6500

Hardness 78-82 65-75

Curing speed 3-50-20

3. Hot melt pressure-sensitive adhesiveIt is mainly used for women's sanitary napkins, children's diapers, hospital bed cushions, incontinence products for the elderly, etc. Especially the latter, with the aging of population structure in China. In the future, the demand for incontinence products for the elderly will increase rapidly. The technical specifications of the hot melt adhesive for this purpose are as follows:

Shape: white or yellowish block viscoelastic, solid

Melting point: 80-90 ℃ bonding strength: 2.0-2.5lg/25mm

Health requirements: tasteless, non-toxic, non irritating to the skin.

4. Multi purpose solvent 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 mounting, computer printing, food production date typing, wire and cable coding, etc., are all the properties of hot-melt adhesive. However, it is not allowed to use the existing granular or powdery dosage forms, and it is not necessary to make it liquid in the presence of suitable solvents, and coating it on a certain substrate to obtain a thin and uniform adhesive Membrane can be used in the production of the next process. Due to the different kinds of solute (hot melt adhesive), a variety of solvent hot melt adhesives can be prepared.

5. Hot melt adhesive for furniture edge sealing

China is a country lacking in wood. Except for a small number of high-grade furniture using solid wood, most of the general furniture is made of fiberboard, shaving or sawdust board. The edge of the furniture board must be bonded with hot-melt adhesive to increase the aesthetic feeling, which is similar to solid wood furniture. The technical specifications of the hot melt adhesive for this purpose are as follows:

Appearance: white or yellowish granular or rod-shaped.

Melting point: 70-84 ℃; viscosity: 45000-75000 (180 ℃)

Relative hardness: 70-80%; curing speed: 8-12 seconds.