What should I pay attention to when buying melamine tableware for wholesale melamine tableware?

Melamine tableware wholesale melamine tableware is N-methylol substituents further condensed into a linear resin. In general, the molecular weight of the product varies with the reaction conditions, from water-soluble to water-insoluble, and even insoluble solids can be formed. Melamine resin does not cure at room temperature, and generally requires heat curing at 130~150°C. The results show that adding a small amount of acid as a catalyst can increase the curing rate. The cured melamine formaldehyde resin is colorless and transparent, stable in boiling water, and can even be used at 150°C. It has self-extinguishing, anti-arc and good mechanical properties.

Due to the high price of melamine powder, some unscrupulous merchants directly use urea-formaldehyde molding powder as raw material in order to pursue profits; some use urea-formaldehyde molding powder as raw material, and then coat a layer of melamine powder on the outer surface of tableware. Tableware made of urea formaldehyde is harmful to the human body. Therefore, melamine tableware wholesale suggests that when purchasing melamine tableware, the following are some suggestions:

1. First, we should go to a large shopping mall or supermarket to buy. Generally, unqualified manufacturers are eliminated when products are introduced.

2. How to distinguish whether it is qualified or not: one look, two touches, and three simple tests.

(1) at a glance

Look at the certificate of conformity, the certificate of melamine tableware must contain information such as QS mark and number, implementation standard, temperature range of use, raw materials used and company name, address, contact information, etc. It should be noted that there are currently some manufacturers on the market who have obtained With the production license (QS), it can produce melamine tableware and imitation porcelain coated with urea at the same time. If you cannot determine whether the product is qualified, it is best to perform a self-inspection according to a simple test method to basically determine whether the product meets the requirements; look at the product itself: whether there is obvious deformation, color difference, smooth surface, uneven bottom, clear decal pattern, wrinkles or bubbles.

(2) Second touch

Check whether the surface is rough or uneven. Use a white napkin to wipe colored dishes back and forth to see if they fade. In addition, compared with counterfeit tableware produced using urea-formaldehyde resin raw materials, qualified melamine tableware has the characteristics of high compactness and large proportion. Qualified melamine tableware with the same appearance and specifications is about 5% heavier than counterfeit melamine tableware.

(3) Simple test reference

Melamine Tableware Wholesale The moisture-proof and heat-resistant test method in standard melamine tableware is very simple, and can test whether the product is qualified: boil in boiling water for 30 minutes, then take it out and put it in for 1 hour, repeat three times. If the tableware has white, astringent taste, foaming, cracking and pungent smell during the process, it indicates that the tableware may have quality problems: it contains toxic and harmful substances such as formaldehyde. However, good quality products can be boiled four times without any problems. Even if the tableware is qualified, whether it is melamine tableware or ceramic or stainless steel tableware, boiling with boiling water can not only sterilize, but also promote the dissolution or volatilization of residual substances.

3. When purchasing, you should ask the mall for the receipt. If there is a quality problem with the product, it is easy to trace it.

4. If consumers purchase suspected unqualified melamine tableware, they should report and complain to the seller and relevant departments in a timely manner.