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Phenolic resin acid method
by：CSSSLD
2021-01-23
Colorants gives phenolic plastics color, yellow to brown, but as a result of PF itself so often made him black or brown injection molding processing products.
Sometimes in order to improve some performance also often join polymer modified, for example, to improve the impact strength, often join styrene-butadiene rubber.
To improve the heat resistance and join the organic silicon.
In order to improve the tensile strength can join, PVC, PA.
In addition, still can add mould inhibitor, antistatic agent, flame retardant, etc.
All in all, according to different purposes, adding different additives and polymer modified can obtain different properties and USES of PF plastics.
PF molding powder is also called the molding compound, is on the basis of PF, add powder filler, curing agent, promoting agents, lubricants, and other additives, powder material made by a certain processing technology. Generally mainly choose acid resin molding powder preparation, alkaline resin is only used to require high performance, small and alkali resistance of the use of smell. Moulding powder in addition to the PF acid method, other components can be choose according to the properties and USES of the products.
all kinds of different filler properties, should be selected according to product performance requirements. Wood powder is used as the filler can improve the mechanical strength of products not only, and can effectively reduce the heat and contraction of resin in molding phenomenon, make the products smooth and beautiful appearance, cost reduction, but the wood powder easy water absorption and reducing product performance; Asbestos powder can improve the heat resistance of products, mechanical strength and dimensional stability, but its poor health. Usually, the packing of the molding powder 30% 60%.
acid resin commonly used for six four methylene amine curing agent, mainly used to provide methylene bridge, the resin curing, general usage by 10% 15% as well. Insufficient dosage, molding powder curing speed slower, crosslinking degree is low, lowering the heat resistance and rigidity of products; Dosage is too much, does not increase the curing speed and heat resistance, makes the water resistance, electrical insulation, still can make products with low molecular thing too much, produce more volatiles during forming, make products to produce bubble, swelling phenomenon.
acid resin commonly used magnesium chloride, calcium oxide, such as promoting agent, in addition to increase outside the curing speed of resin and hardener mixture acid method, also rise to neutralize excess acid, prevent mold, equipment corrosion effect; For alkaline resin can promote its curing accelerator, improve heat resistance, water resistance and hardness of the product. Usually, the dosage of the promoter is approximately 2%. The purpose of using lubricants is to prevent the material in the forming die stick in, so that the products emerge, and can increase liquidity in the molding powder, is advantageous to the processing.
under the condition of heating, in 170 ℃ or so commonly make alkaline PF cure is the most commonly used cure method, called the thermal curing. But when used as adhesives or casting resin, need low curing temperature, room temperature curing, even at this point in the resin add proper inorganic acid or organic acid can be realized, such as hydrochloric acid, phosphoric acid, p-toluene sulfonic acid, phenol sulfonic acid, etc. , this is often referred to as the acid curing or room temperature curing.
the commonly used lubricants are oleic acid, stearic acid, calcium stearate and zinc stearate. Usage of resin quality 1% Excessive dosage of 2%, will affect the injection molding processing plant products luster, prevents mixing and plasticizing of each composition. Add a certain amount of filler can improve the performance, or give some PF get rid of disadvantages of brittleness and the shrinkage rate of the resin is too large, at the same time can reduce the cost of materials. PF the commonly used packing wood powder, mica, talcum powder, quartz, alumina powder, red clay, asbestos, graphite, glass fiber, etc.
more excellent articles: polyether ether ketone, click directly.
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changshu smoothly da plastic products factory website: http://www. csssld。 Cn /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
PF molding powder is also called the molding compound, is on the basis of PF, add powder filler, curing agent, promoting agents, lubricants, and other additives, powder material made by a certain processing technology. Generally mainly choose acid resin molding powder preparation, alkaline resin is only used to require high performance, small and alkali resistance of the use of smell. Moulding powder in addition to the PF acid method, other components can be choose according to the properties and USES of the products.
all kinds of different filler properties, should be selected according to product performance requirements. Wood powder is used as the filler can improve the mechanical strength of products not only, and can effectively reduce the heat and contraction of resin in molding phenomenon, make the products smooth and beautiful appearance, cost reduction, but the wood powder easy water absorption and reducing product performance; Asbestos powder can improve the heat resistance of products, mechanical strength and dimensional stability, but its poor health. Usually, the packing of the molding powder 30% 60%.
acid resin commonly used for six four methylene amine curing agent, mainly used to provide methylene bridge, the resin curing, general usage by 10% 15% as well. Insufficient dosage, molding powder curing speed slower, crosslinking degree is low, lowering the heat resistance and rigidity of products; Dosage is too much, does not increase the curing speed and heat resistance, makes the water resistance, electrical insulation, still can make products with low molecular thing too much, produce more volatiles during forming, make products to produce bubble, swelling phenomenon.
acid resin commonly used magnesium chloride, calcium oxide, such as promoting agent, in addition to increase outside the curing speed of resin and hardener mixture acid method, also rise to neutralize excess acid, prevent mold, equipment corrosion effect; For alkaline resin can promote its curing accelerator, improve heat resistance, water resistance and hardness of the product. Usually, the dosage of the promoter is approximately 2%. The purpose of using lubricants is to prevent the material in the forming die stick in, so that the products emerge, and can increase liquidity in the molding powder, is advantageous to the processing.
under the condition of heating, in 170 ℃ or so commonly make alkaline PF cure is the most commonly used cure method, called the thermal curing. But when used as adhesives or casting resin, need low curing temperature, room temperature curing, even at this point in the resin add proper inorganic acid or organic acid can be realized, such as hydrochloric acid, phosphoric acid, p-toluene sulfonic acid, phenol sulfonic acid, etc. , this is often referred to as the acid curing or room temperature curing.
the commonly used lubricants are oleic acid, stearic acid, calcium stearate and zinc stearate. Usage of resin quality 1% Excessive dosage of 2%, will affect the injection molding processing plant products luster, prevents mixing and plasticizing of each composition. Add a certain amount of filler can improve the performance, or give some PF get rid of disadvantages of brittleness and the shrinkage rate of the resin is too large, at the same time can reduce the cost of materials. PF the commonly used packing wood powder, mica, talcum powder, quartz, alumina powder, red clay, asbestos, graphite, glass fiber, etc.
more excellent articles: polyether ether ketone, click directly.
http://www。 csssld。 cn//html/2017/Info_1028/709。 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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