my country's adhesive consumption will still be at the same level8%-10% growth rate, its development direction can be divided into six major categories, among which, polyurethane adhesive has become the domestic蕞One ​​of the rubber species with great potential for development.

1. Urea-formaldehyde glue

Urea-formaldehyde glue is a catalyst between urea and formaldehyde (alkaline catalyst or acidic catalyst), the initial polycondensation into urea-formaldehyde Resin, and then under the action of curing agent or additives, it forms an insoluble The final resin adhesive.

With the rapid development of science and technology, the new technology of urea-formaldehyde glue production technology keeps pace with the times and continues to improve on the basis of the original tradition. Formaldehyde, urea and glue depot are used as the main raw materials before acid adjustment20 minutes, add a large proportion of Jiao De Bao, adjust the acidity, and adjust the pH value to 7-7.5. The urea-formaldehyde glue produced using new technology has good performance indicators, low production cost and reduced free aldehyde content. Due to the new technology of urea-formaldehyde glue, which is simple to manufacture, easy to use, low cost and has good performance, it has become the main glue type in the production of artificial panels in my country, accounting for more than 90% of the glue used in artificial panels.

It accounts for about 30% of the total amount of synthetic adhesives in my country. As people's environmental requirements for artificial boards will be higher, the market potential of low formaldehyde-emitting urea-formaldehyde adhesives is huge. At present, foreign companies are producing low-formaldehyde-emitting urea-formaldehyde glue in my country, and at the same time, they have established large-scale wood processing plants.

2. Hot melt adhesive

Hot melt adhesive is a plastic adhesive. Within a certain temperature range, its physical state changes with temperature changes, but its chemical properties remain unchanged. It is non-toxic and odorless and is an environmentally friendly chemical product. It is favored because the product itself is solid, easy to package, transport, store, solvent-free, non-polluting, and non-toxic; as well as the advantages of simple production process, high added value, high bonding strength, and fast speed.

This kind of adhesive does not use organic solvents, has fast construction and good bonding effect. It is the reason why my country’s demand has grown in recent yearsVeryQuick glue species is also the future development direction. In addition to the traditionalEVA hot melt adhesive, China is also in urgent need of developing new varieties of polyester and polyamide hot melt adhesives.

3. Polyurethane adhesive

Polyurethane adhesive refers to the polyurethane adhesive containing urethane group or isocyanate-based adhesives. Polyurethane adhesives are divided into polyisocyanate and polyurethane. The polyisocyanate molecular chain contains isocyanate groups and urethane groups , Therefore, polyurethane adhesives show a high degree of activity and polarity. With substrates containing active hydrogen, such as foam, plastic, wood, leather, fabric, paper, ceramics, etc. Porous materials, as well as metals and glass , rubber, plastic and other materials with smooth surfaces have excellent chemical adhesion.

Polyurethane adhesive is currently developing rapidlyPolyurethane resin中 It has excellent performance and has been widely used in many aspects. It is an important component of the eight major Synthetic adhesiveOne ​​of the important varieties 一, is widely used in shoemaking, packaging, construction, Industry,Automotive and other fields, due to its excellent performance, are considered domestic蕞One ​​of the rubber species with development potential.

four , silicone adhesive

Organic silicone adhesive is a single-component, translucent paste-like room temperature-curing adhesive that is a high-performance elastomer that is naturally cured. Haveexcellence's resistance to cold and heat, aging resistance and electrical insulation properties, suitable for most metals andNon-metallic materialshas good adhesion.

In developed countries, silicone sealant is mainly used for building sealing. In the next few years, silicone sealant will also become the leading sealant for construction in my countryMainGlass type.

5. Epoxy resin glue

Epoxy resin glue generally refers to Epoxy resin adhesive , epoxy resin glue generally needs to be addedEpoxy resin curing agentLet it solidify. Epoxy resin glue can be classified according to its main composition, professional use, construction conditions, and packaging form.

Epoxy resin adhesives used in the electronics industry and epoxy structural adhesives used in the construction industry are technically difficult to produce and domestic products are of poor quality. They currently mainly rely on imports.

6. PVC Plastisol

PVC Plastisol usually refers to a suspension of powdered vinyl chloride polymer or copolymer in a liquid plasticizer. Liquid plasticizer has no or only a small dissolving effect on resin at room temperature, but it becomes a solvent for resin after heating. When it reaches a certain temperature, the resin is completely dissolved in the plasticizer to form a homogeneous plastic body, which becomes a flexible solid when cooled

PVC plastisol is the main sealant used in automobiles, accounting for approximately 10% of China’s automobile adhesivesOne-third, the current annual demand is about 10,000 tons, with the increase of China's automobile With the development of industry, especially the automobile industry, PVC plastisol will have broad development prospects.

Title of this article: Six major directions of development of adhesives

Source of this article: http://www. wellgo.com.cn/newb/information_2385.shtml

Title of this article: Six major directions for the development of adhesives

p>

Source of this article: http://www.wellgo.com.cn/newb/information_2385.shtml