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The composition of epoxy plastic
by：CSSSLD
2021-01-23
EP FRP is the main component of injection processing resin, curing agent and glass fiber, basic similar molding method and the UP.
From economic considerations, EP FRP less UP and PF FRP application widely, but it except possesses the advantages of FRP commonly, also can provide higher tensile strength and peel strength between the layers, wet resistance is more outstanding, more suitable for use in harsh conditions, therefore, in many aspects, such as aviation, shipbuilding, electrical applications.
another type of toughening agent are some of the material contains various active group, such as PA, low relative molecular mass and nitrile butadiene rubber, liquid UP, epoxy vegetable oil, etc. They directly participate in the curing reaction of EP, become a part of crosslinking system, therefore, called active toughening agent. This kind of toughening agent can greatly improve the toughness of the EP, to improve the impact strength and elongation. Thinner is a kind of used to reduce EP viscosity, improving infiltration, diffusion, adsorption ability of the material.
the performance of epoxy plastic has the following characteristics: high mechanical properties, especially the EP glass fiber reinforced glass fiber has excellent tensile, impact strength; Excellent heat resistant performance, such as the class contains benzene anhydride curing agent can improve the heat resistance of epoxy plastic; Performance is good, is often used in electrical equipment and insulation device packaging materials; Stability of benzene ring and ether bond, structure compact, and good chemical stability, general acid, alkali medium erosion; Linear expansion coefficient and the molding shrinkage of small, good dimensional stability.
add thinner, can reduce the viscosity of the resin, making them easy to flow, to improve the molding process performance. In addition, select the appropriate thinner, and conducive to control heat of reaction of curing system, extend the curing cycle, improve the dosage of filler. But thinners dosage can reduce curing the main performance. Packing is thermosetting resins commonly used additives. Appropriate to join packing can not only reduce the dosage of resin, relatively lower costs, and can get a lot of effect.
filler can improve the forming performance, such as inhibiting heat of reaction, extend the curing cycle, reduce shrinkage, adjust the viscosity, etc. Improve the heat resistance, improve performance and enhance the mechanical strength, such as hardness, stiffness, compression strength, wear resistance, etc. Thus the above several EP to add all kinds of packing. In actual production, should be used according to the environment and product performance requirements to select different packing, the commonly used with glass fiber, quartz powder, mica powder, talcum powder, kaolin, etc.
toughening agent in order to improve the toughness of the EP is to improve the impact strength and join a class of substances. In essence this kind of material and plasticizer, there is no much difference, and some itself is plasticizer, such as phthalic acid ester, phosphate ester, etc. They do not contain can participate in the curing reaction active group, often referred to as inactive toughening agent. At the same time, due to their small viscosity, can double as diluent, usage is generally 5% 20%.
epoxy plastic performance mainly depends on the type of epoxy resin, curing agent and additives. After curing agent on the curing become part of the structure of EP, so different curing agent can bring a big difference to EP curing performance, such as income with low molecular weight polyamide cured epoxy plastic heat distortion temperature is about 90 ℃, and with anhydride cured epoxy plastic processing plastic heat distortion temperature can exceed 200 ℃, both differ 100 ℃. Thus, compared with other thermosetting plastics, the effect of EP curing agent is especially important.
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another type of toughening agent are some of the material contains various active group, such as PA, low relative molecular mass and nitrile butadiene rubber, liquid UP, epoxy vegetable oil, etc. They directly participate in the curing reaction of EP, become a part of crosslinking system, therefore, called active toughening agent. This kind of toughening agent can greatly improve the toughness of the EP, to improve the impact strength and elongation. Thinner is a kind of used to reduce EP viscosity, improving infiltration, diffusion, adsorption ability of the material.
the performance of epoxy plastic has the following characteristics: high mechanical properties, especially the EP glass fiber reinforced glass fiber has excellent tensile, impact strength; Excellent heat resistant performance, such as the class contains benzene anhydride curing agent can improve the heat resistance of epoxy plastic; Performance is good, is often used in electrical equipment and insulation device packaging materials; Stability of benzene ring and ether bond, structure compact, and good chemical stability, general acid, alkali medium erosion; Linear expansion coefficient and the molding shrinkage of small, good dimensional stability.
add thinner, can reduce the viscosity of the resin, making them easy to flow, to improve the molding process performance. In addition, select the appropriate thinner, and conducive to control heat of reaction of curing system, extend the curing cycle, improve the dosage of filler. But thinners dosage can reduce curing the main performance. Packing is thermosetting resins commonly used additives. Appropriate to join packing can not only reduce the dosage of resin, relatively lower costs, and can get a lot of effect.
filler can improve the forming performance, such as inhibiting heat of reaction, extend the curing cycle, reduce shrinkage, adjust the viscosity, etc. Improve the heat resistance, improve performance and enhance the mechanical strength, such as hardness, stiffness, compression strength, wear resistance, etc. Thus the above several EP to add all kinds of packing. In actual production, should be used according to the environment and product performance requirements to select different packing, the commonly used with glass fiber, quartz powder, mica powder, talcum powder, kaolin, etc.
toughening agent in order to improve the toughness of the EP is to improve the impact strength and join a class of substances. In essence this kind of material and plasticizer, there is no much difference, and some itself is plasticizer, such as phthalic acid ester, phosphate ester, etc. They do not contain can participate in the curing reaction active group, often referred to as inactive toughening agent. At the same time, due to their small viscosity, can double as diluent, usage is generally 5% 20%.
epoxy plastic performance mainly depends on the type of epoxy resin, curing agent and additives. After curing agent on the curing become part of the structure of EP, so different curing agent can bring a big difference to EP curing performance, such as income with low molecular weight polyamide cured epoxy plastic heat distortion temperature is about 90 ℃, and with anhydride cured epoxy plastic processing plastic heat distortion temperature can exceed 200 ℃, both differ 100 ℃. Thus, compared with other thermosetting plastics, the effect of EP curing agent is especially important.
more excellent articles: unsaturated polyester molding and application, click directly.
http://www。 csssld。 cn//html/2017/Info_1106/713。 HTML
changshu smoothly da plastic products factory website: http://www. csssld。 Cn /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
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