Analysis of Polyurethane Casting Resin
Polyurethane Casting Resin is an organic polymer compound containing two or more epoxy groups in the molecule, which is also called artificial resin, artificial resin, resin and the like. Is a thermosetting plastic.
China since 1958 began to study the Polyurethane Casting Resin, and very quickly into the industrial production, has been booming throughout the country, in addition to the production of ordinary bisphenol A-epichlorohydrin-type Polyurethane Casting Resin, Still the production of various types of new Polyurethane Casting Resin, to meet the national defense and national economic departments of the urgent need. Polyurethane Casting Resin has good physical and chemical properties, it is the surface of metal and non-metallic materials with excellent bonding strength, good dielectric properties, variable shrinkage is small, product size and stability, high hardness, flexibility is better , The alkali and most of the solvent stability, which is widely used in national defense, national economy departments, for casting, dipping, laminating materials, adhesives, coatings and other purposes.
Polyurethane Casting Resin Material Features: easy curing, strong adhesion, low shrinkage, chemical stability, resistance to mold. The process is simple, without the need to exert high pressure, with good insulation, chemical resistance, with good oil resistance and solvent resistance.
Storage Note: Store in a cool ventilated place; must be used with the curing agent.
Polyurethane Casting Resin classification is not yet unified, generally in accordance with the strength, heat resistance grade and characteristics of classification, polyurethane resin casting the main varieties of 16 species, including general rubber, structural adhesive, temperature plastic, low temperature plastic, Conductive adhesive, plastic glue, adhesive, plastic, plastic, plastic, plastic, plastic, plastic, plastic, plastic, plastic, plastic, plastic, plastic, plastic,
The classification of Polyurethane Casting Resin adhesives in the industry there are several sub-methods:
1, according to its main composition - divided into pure Polyurethane Casting Resin adhesive and modified Polyurethane Casting Resin adhesive;
2, according to its professional use - is divided into mechanical polyurethane resin casting adhesive, polyurethane polyurethane resin casting adhesive, electronic polyurethane polyurethane resin casting adhesive, repair polyurethane resin adhesive and plastic, Glue and so on;
3, according to its construction conditions - divided into room temperature curing adhesive, low temperature curing adhesive and other curing adhesive;
4, according to its packaging form - can be divided into single-component type glue, two-component plastic and multi-component type glue;
There are other sub-methods, such as solvent-free glue, solvent-based glue and water-based glue. But the application of more classification. Above is purely personal views SMS, Shouban production requirements, please call.
Polyurethane Casting Resin, industrial production for injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping, stretching and other methods to obtain the required products of various molds and tools. In short, Polyurethane Casting Resin is used to shape the product of the tool, this tool consists of a variety of parts, different Polyurethane Casting Resin by the different parts. It is mainly through the molding material to change the physical state to achieve the shape of the product processing. Some of the production of hand-made we used to Polyurethane Casting Resin.
When the billet is deformed in the Polyurethane Casting Resin cavity, it flows and slides along the cavity surface, causing severe friction between the cavity surface and the billet, which causes the Polyurethane Casting Resin to fail due to wear. So the wear resistance of the material is the most basic and most important performance of Polyurethane Casting Resin. Hardness is the main factor affecting wear resistance. Under normal circumstances, the higher the hardness of Polyurethane Casting Resin parts, the smaller the wear, the better the wear resistance. In addition, the wear resistance is also related to the type, quantity, shape, size and distribution of carbides in the material.
2, strong and tough
Polyurethane cast resin working conditions are mostly very poor, and some often bear a greater impact load, resulting in brittle fracture. In order to prevent Polyurethane Casting Resin parts in the work suddenly brittle fracture, Polyurethane Casting Resin to have a high strength and toughness. Polyurethane Casting Resin toughness depends mainly on the material carbon content, grain size and tissue state.
3, fatigue fracture performance
Polyurethane Casting Resin work in the process, the long-term role in the cyclic stress, often lead to fatigue fracture. Its form has a small energy multiple impact fatigue fracture, tensile fatigue fracture contact fatigue fracture and bending fatigue fracture. The fatigue fracture properties of polyurethane resin are mainly determined by its strength, toughness, hardness, and the content of inclusions in the material.