аминопластмассовых прессмасса

IntroductionA.the characteristics of Urea moulding compound Urea moulding compound is a kind of moulding compound which is based on the Urea-formaldehyde resin with high-class α-cellulose as filler. To make urea moulding compound be multi-functional, we add all kinds of additives like pigment, cure regulators, lubricants and heat-resistance. To make sure that the chemical composition of the material will minimize the risks to the natural and society, we should choose the raw and auxiliary material with high quality from home and abroad at fixed points and quantity. Urea moulding compound has all kinds of types and colors, with the characteristics of odorlessness, good relative stability and well moisture resistance. The surface of the product made from it is very good-looking, tracking resistant, hard but glossy. Furthermore, the chemical resistance is very good. Fats, oils and common organic solvent do not attack the material and it is also resistant to weak acids, weak bases and surfactants. The electrical properties of the urea moulding compound are also excellent. It has good effects towards insulation, arc resistance, flammability, glow wire, surface resistance and so on. No halogens are present in the composition of the urea moulding compound. Because it has good mechanical physical properties, such as shrinkage and post shrinkage, water absorption, impact resistance, and flexural strength, it complies with the requirements of the widely used material specifications. B.the fields of application for urea moulding compound 1. the contact-element accessories of the low-voltage apparatus 2. the matched toilet seat cover of the sanitary products 3. auxiliary equipments of the daily necessities 4. for entertainment (domino, mahjong) 5. auxiliary equipments of compote and utensil tray C.the processability of urea moulding compound Through the pattern of heat transfer, urea moulding compound includes compression models and injection models. Meanwhile, each of them has different requirements of processability. It can be shown from the aspects of liquidity, moulding speed, low volatility and anti-friction. During the process of shaping of low-voltage apparatus and toilet seat cover, the liquidity and moulding speed should be adjusted according to the change of the average of pressure. Because the cavity is very complex, the low-voltage apparatus is made by using the injection method, and the ability of anti-friction of the moulding compound should be strengthened. However, low volatility is favorable to the cure of the process of moulding, so it will make the stability of the size and the mechanical physical properties meet the standard. D.packaging and storage Our products are delivered in 25kg bags or big-bags. Because urea moulding compound has its own characteristics and it has the requirements of sunscreen, waterproof and ventilate. Therefore, the products should be stored in the dry and ventilated place. Normally, under the condition of below 20°C and the relative humidity ≤40 50°, the storage life will be at least 6 mouths. E.recycling and environment 1. recycling Urea moulding compound can be used for the normal products, and its waste products or the obsolete old products can be made into the granule and fine powder, which can be used in the relative fields, through the way of mechanical smashing and ball-milling. 2. environment Urea moulding compound is made from α-cellulose. The law material is from carbon-based compound, so at last it will end up as natural harmless chemicals like water, nitrogen and carbon dioxide. Moreover, as potentially carcinogenic flame-retardants are not required, the risk to health is reduced. It has the sustainability the environmental management needs. F.general properties property: density, shrinkage, post shrinkage, water absorption, flexural strength, notched impact strength, non-notched impact strength, HDT, glow wire, flammability, surface resistance, volume resistivity, dielectric constant, tracking resistance.