The main ingredients and additives of low temperature hot melt adhesive Gangbao

1) 307 resin is an unsaturated polyester resin obtained by esterification reaction of propylene glycol, ethylene glycol, maleic anhydride and phthalic anhydride.

307 resin is mixed with styrene processing to become the main body of what we call 307 glue. 307 glue must have a certain temperature match when applying. 307 glue is cheap, the operation process is simple, it can be glued and repaired in addition to the finished board, and it can also be bonded to the wool board and semi-finished products; permeate bonding; Large-scale plate back mesh adhesion; The use of scrap scraps to produce parquet slates, etc.

2) Styrene is the diluent of 307 resin and the cross-linking agent of 307 glue curing. The adjustment of viscosity in the process of glue application mainly depends on the role of styrene, and the appropriate dilution process helps to obtain a high-quality product, otherwise it will affect a series of properties of the product, and the general increase should not exceed 40% of the weight of the resin. Care should be taken when modulating.

3) Methyl ethyl ketone peroxide (initiator, curing agent) is a 50% translucent solution of methyl ethyl ketone peroxide in dibutyl phthalate. It acts on 307 glue to initiate a redox reaction and thus solidifies. The amount should be appropriate, the amount will delay the curing of the glue and make the curing incomplete, the amount is not only not driven by faster curing, but also the peroxide will seep out from the cured resin, bringing oxidation to the board surface stacked together, causing damage to the board surface.

In many panel processing plants, the surface (front) of colored plates (especially bare boards) is gridded, which is a harmful role. There are strict requirements for the transportation and storage of this item, which must be observed.

4) Cobalt isooctanoate accelerator is a purple solution of cobalt isooctanoate dissolved in styrene in a certain proportion. It is the most oxidative drier with the strongest drying activity. Its function is to reduce the decomposition temperature of the initiator and speed up the reaction between the initiator and the resin.

Promote the polymerization of glue at room temperature. Its dosage should change with the working environment temperature of 307 glue application, the ambient temperature is high, the dosage can be less, and the dosage should be more. Dosage should be restrained at 1-4 .

a) Peroxide is combined with a suitable accelerator to form an oxidation-reduction curing system, which is a commonly used room temperature curing system, which can receive excellent curing results.

b) Methyl ethyl ketone peroxide liquid initiator (curing agent) and cobalt isooctanoate liquid accelerator are two common auxiliary agents that are indispensable for blending and pairing applications in the application of 307 glue. When applying, according to the working environment temperature, different proportions are required, and the application should be strictly in accordance with the regulations. It should be noted that these two liquids are not allowed to be transported and stored in the same room (in the same vehicle and in the same place) during transportation and storage.

5) An appropriate increase in light calcium, heavy calcium, porcelain clay, lithop powder and other fillers can improve the bonding strength of 307 glue, enhance the impact strength of the board surface, reduce the shrinkage rate of glue, prevent the glue from collapsing, and save the amount of resin.

a) Preparation of adhesives (glues).

b) 307 glue, dilution monomer-styrene, accelerator-cobalt naphthenate, filler-stone powder, color paste, etc. are mixed first, and this process is to add accelerator in advance, which is called pre-promotion. The curing agent - methyl ethyl ketone peroxide is added at any time when it is applied.

Gangbao has never heard of it, Endurance Lion is quite famous.

The main ingredient TPU, search for Wenzhou low-temperature hot-melt adhesive Gangbao manufacturer, you will know.

The interface temperature of the material lamination is 80 100; The activation temperature is 75 90If a hot-cooled back-sleeve setting machine is used, the hot mold temperature should be set to 105 120 and held for 15 20 seconds (the temperature and time settings need to be adjusted according to the changes of the facial material and the inner material); If the California last method is used, the temperature of the heating activation system of the side forming line should be set at 100 105 for 5 minutes.

Introduction: Commonly known as Gangbao, scientific name: hot-melt glue Gangbao, is a new type of high-quality material for shoemaking.

The use of low-temperature hot melt glue Gangbao instead of the traditional Gangbao to make the front lining and back cover of shoes, high production efficiency, after the shape of the shoe is straight and round, not easy to deform, the comfort and beauty of the shoes have been greatly improved, 100% environmentally friendly products.

Color: white, blue, green, gray, or customized according to the requirements of the guest only to search the household. Thickness:

Packing: Roll or sheet. How to use hot melt adhesive Gangbao:

The temperature of the laminating interface of all materials is 100-120 degrees, and the activation temperature is 70-90 degrees, if the hot-cooled post-setting machine is used, the temperature of the hot mold should be set to 125-135 degrees and kept for 7-15 seconds (the temperature and time setting refers to the change of the fabric material and the inner material to be adjusted); If the process of California-style last insertion method is used, the temperature of the heating and activation system of the molding line should be set at 110-125 and the temperature should be maintained for 7-15 minutes.

The unit is mainly composed of a main engine, a screen changer, a mold, a tablet press, a laminating device, a conveying table, a traction machine, a winder or a cutting machine, etc.;

The reducer body is made of steel castings, the gears are made of alloy steel and tooth grinding, and each lubrication point in the box is mandatory.

Lubrication method, lubricating oil is equipped with high-efficiency water cooling system.

The screw material is made of 38CrMOA1A high-quality nitriding steel, which is nitrided and sprayed with alloy on the surface.

The barrel material is made of 38CrMOA1A high-quality nitriding steel, which is nitrided and sprayed with alloy on the surface.

This unit is mainly suitable for: hot-melt adhesive shoe materials, hot-melt adhesive Gangbao, dispensing cloth, shaped cloth shoe materials.

Low-temperature hot-melt film is commonly known as low-temperature hot-melt glue Gangbao, low-temperature Gangbao; State-of-the-art front lining and back lining materials, with the high elasticity of rubber and the plasticity of thermoplastic materials; The viscosity remains unchanged after repeated use; After heating and softening, the product is also non-sticky. Extremely low operating temperatures, suitable opening times, and high bond strength. The finished shoes are beautifully molded, not easy to deform after molding, and have excellent resilience, excellent weather resistance and wear resistance, and the material is green and environmentally friendly.

There are no creases and water chestnuts when shaping, which reduces the defective rate of products and has good adhesion to various materials, and there is no need to apply adhesives. Energy-saving and excellent operability.