What is Melamine plastic tableware?

Melamine (melamine, MF, chemical formula: C3H6N6) plastic tableware is a high molecular polymer, the monomers of which are formaldehyde and melamine. A 37% aqueous solution of formaldehyde was used for the reaction, and the molar ratio of the two monomers of formaldehyde and melamine was 2 to 3.

Tableware synthesis

Melamine (melamine, MF, chemical formula: C3H6N6) plastic tableware is a high molecular polymer, the monomers of which are formaldehyde and melamine. A 37% aqueous solution of formaldehyde was used for the reaction, and the molar ratio of the two monomers of formaldehyde and melamine was 2 to 3. Studies have shown that with the increase of formaldehyde dosage, the amount of formaldehyde is also increased, and the reaction is easy to carry out; changing the amount of formaldehyde can produce melamine resin obtained from different methylol melamine; when the pH of the reaction system is 8.5, side reaction Less, the reaction is easy to control; the temperature is high, the reaction speed is fast, and the amount of formaldehyde binding is not affected in the range of 54-80 °C. The first step of the reaction is to form a different number of N-hydroxymethyl substituents and then further condensed into a linear resin. In general, the reaction conditions are different, and the molecular weight of the product is also different, from water-soluble to poorly soluble in water, and even insoluble solids can be formed. The melamine resin does not cure at room temperature and generally needs to be thermally cured at 130 to 150 °C. Studies have shown that a small amount of acid is added as a catalyst during curing to increase the curing rate. The cured melamine formaldehyde resin is colorless and transparent, stable in boiling water, and can even be used at a high temperature of 150 ° C, and has self-extinguishing property, arc resistance and good mechanical properties.

China Melamine Dinnerware Mold

Production process editor

One. Preheating procedure: Weigh the material according to the required weight of the tableware, and put it into the high-precision wave to preheat it to make the powdery raw material block.

two. The plain noodle procedure: pour the pre-heated agglomerated raw materials into the mold, start the mechanical plain surface procedure, and pass the high temperature and high pressure and solidify molding.

three. Decal procedure: Cut the varnished flower paper according to the flower shape, paste it on the plain-shaped tableware according to the requirements, the flower paper should be affixed, the decal position is moderate, the appearance is beautiful, and the flower is started to start the mechanical printing. program.

four. Gold addition procedure: After the product is affixed with flowers, evenly spread the light powder on the surface of the product, the light powder can not be sprinkled less, otherwise it will affect the color degree of the product, of course, it can not be sown. Then start the machine, under the high temperature and high pressure of the machine, solidify, the surface of the product has the general luster of porcelain.

Fives. Polishing procedure: After the product is produced, it needs to be polished and polished. Because the produced products have burrs, it is not conducive to the use of people's lives, and it is easy to cause damage to human hands and mouth; therefore, polishing and polishing are essential, through polishing, Polishing removes the burrs of the product, making the product look more beautiful and the edges smoother.

China Melamine Tableware Mold

six. Inspection and packaging procedures: After the products have been polished and polished, they enter the inspection process. In order to ensure the quality of the products and strictly control the quality inspection, there should be initial inspection and re-inspection, pick out the unqualified products, and then enter the warehouse packaging.

Tableware knowledge editing

Melamine plastic tableware, also known as melamine tableware, is widely used in fast food because of its light weight, beautiful appearance, low temperature resistance (can be directly placed in the refrigerator), boiling resistance (boiling water can be boiled, boiled), pollution resistance, and not easy to break. Industry and children's catering industry, etc., are loved by consumers and children.

How to choose tableware

Due to the high price of melamine powder, some unscrupulous traders are directly pursuing urea-formaldehyde molding powder as raw material for the pursuit of profit; some are using urea-formaldehyde molding powder as raw material, and then in the tableware. The outer surface is coated with a layer of melamine powder. Tableware made of urea-formaldehyde is harmful to the human body. When consumers buy, first go to the regular store, supermarket to buy, do not be cheap, buy on the stalls; Secondly, when buying, you should see whether the appliance has obvious deformation, color difference, smooth surface, bottom Whether it is uneven, whether the decal pattern is clear, whether there are wrinkles and bubbles, and whether the colored tableware is rubbed back and forth with a white napkin is fading.

China Melamine Crockery Mold

How to use tableware correctly

Due to the special molecular structure of melamine plastics, melamine tableware is not suitable for use in microwave ovens, and cracking may occur if used. For the cleaning of melamine plastic tableware, use a softer rag. Never use rags such as scouring pad or decontamination powder to clean the surface of the tableware, because scouring pad and decontamination powder will wipe the surface of the tableware. To make it more susceptible to pollution.