Plastic water cups are favored by the market due to their various styles, bright colors, light weight, large capacity, low price, strong and durable. Currently, plastic water cups on the market range from baby water cups to elderly water cups, from portable cups to sports water cups. The material characteristics, production process and use of plastic water cups have been mentioned in many previous articles. Recently, I have received messages from some readers.
There are many questions about how to identify whether a plastic water cup is a safe and qualified water cup and whether the problems found when purchasing a plastic water cup are normal. Today, I will answer some questions about plastic water cups from friends. In summary, how to ” Identify at a glance whether the plastic water cup you purchased is qualified, safe and healthy?
Then I will provide you with some suggestions for judging the order of plastic water cups from top to bottom and from inside to outside. Let’s first look at the appearance of the newly purchased plastic water cup. From the cup lid, check whether the cup lid accessories are complete and whether there are any spots similar to black spots in the original color of the lid. Usually, these spots are caused by adding recycled materials. , that is to say, the more impurities there are, the more recycled materials will be. Recycled materials are the general term for the waste materials produced in the past production of plastic water cups, crushed defective plastic water cups, etc., so recycled materials are not safe and healthy materials, and many recycled materials cannot even reach food grade. .
Then we check whether the cup lid is deformed, whether there are burrs on the edge (the professional use of the water cup factory is called burr), and whether the material used for the cup lid is uneven in thickness. I saw with my own eyes that a friend bought a plastic water cup and found that there were too many flaps. He used a knife to trim the flaps himself. I couldn’t laugh or cry at my friend’s behavior. It was obviously a substandard product, but my friend tolerated it with his broad mind. The uneven thickness of the cup lid can be molded out by hand. I have also seen water cups with seriously uneven lid thickness. Some places are very thick, and some places can even see the lines on the back through light.
Plastic water cup lids have complex functions, especially those with hardware accessories. Friends, you must pay attention to whether the hardware accessories are rusty. If so, no matter how you like this water cup, we recommend that you return it. It’s better to return it.
After looking at the cup cover, we need to look at the body part of the water cup. Many plastic water cup bodies are transparent, translucent or frosted opaque. For the transparent cup body, we need to look at the cleanliness. The closer it is to glass-level transparency, the more transparent it will be. Well, of course, the plastic materials are different, and the transparency of the final product is also different. Here, the editor is talking about identifying whether the water cup is qualified, and does not evaluate other properties of the material, such as whether it contains bisphenol A and whether it can hold high-temperature hot water. The transparency of the cup body will decrease after adding recycled materials. The more recycled materials are added, the worse the transparency will be. Although some water cups are new, when you hold them in your hand, you will find that they should be colorless and transparent, and they do have a foggy feeling. Most of these are caused by adding a large amount of recycled materials. caused by materials.
Most of the translucent plastic water cups are colored, so when we buy them, we try to make them lighter in color, and we also use the cleanliness and transparency as the standard.
For opaque water cups, the editor recommends buying light-colored ones, because the darker the plastic water cup, the harder it is to add recycled materials, especially the black plastic water cup. Even if a large amount of recycled materials is added, it cannot be seen from the surface. figure it out. However, the lighter and more transparent the plastic water cup is, the easier it is to determine whether there is any recycled material added to the cup body. The most obvious manifestation is that you will find variegated colors or black spots in the cup body material.
As for how to identify the surface of a plastic water cup after it is sprayed with paint, this is the most difficult. You can identify it if you want to. Open the lid of the cup and look through the mouth of the cup toward a strong light. Usually, if the surface of a plastic water cup is sprayed with paint, the cup itself will appear. It is transparent, and it is easy to detect whether there are impurities in the wall of the water cup through strong light.
In addition to the way of seeing, we also need to use the way of smelling. The editor of Wen recommends that you use the three times method.
First, smell the packaging box of the water cup to see if there is an unpleasant and pungent smell. I believe that some plastic water cups purchased by some friends will have a pungent smell when opened. If a serious smell appears after opening the package, you can basically tell. There is something wrong with the material used in this water cup and it does not meet food grade standards.
If there is no obvious smell after opening the package, we can open the lid of the water cup and smell it. If there is a pungent smell after opening, it also means that there is a problem with the material of the water cup. The pungent smell is usually caused by the material not meeting the standard. This includes poor quality of the material itself, too much recycled material added to the raw material, or material contamination caused by negligence in material management during production management.
Some friends couldn’t help but ask. They opened the lid of the cup and smelled it inside. They found that there was a smell, but it was not very pungent. Some of them also had a faint smell of tea. In this case, how to judge whether the material of the water cup is suitable and qualified and whether it can be used normally. What’s up?
Then we have to smell it for the third time. Some manufacturers know that there is a problem with their products. In order to prevent consumers from discovering that the product is substandard by smelling the smell, these factories will dry the water cups they produce for a long time to evaporate the smell through drying. In order to further cover up the During packaging, a “tea bag” desiccant with a tea-like aroma is added to the empty cup to cover up the unpleasant smell through the evaporation of the aroma. Water cups with good materials are usually filled with tasteless desiccant from the factory.
Friends, after opening the plastic water cup with peculiar smell, take out the desiccant, then use clean water (normal temperature water is best, no need to use high temperature water) and plant-based detergent to clean it. After washing it twice, wipe it dry or let it dry. Smell again to see if there is any smell inside the cup. If there is an obvious pungent smell, it means there is something wrong with the material of the water cup.
Do any friends think that these methods we share are also suitable for water cups made of other materials, such as stainless steel water cups, glass water cups, etc. Usually, the smell is mainly caused by accessories made of plastic materials. Stainless steel water cups and glass water cups are not very suitable. , when I have the opportunity later, I will sort out how to identify qualified stainless steel thermos cups and qualified glass water cups.
Next, I will share other problems with water cups and tell you how to pay attention to them.
Some water cup factories will have problems with orders due to delivery, quality and other issues. In this case, the factory will have inventory. Some factories even have inventory that has been backlogged for more than 10 years. In order to recover funds, some factories will dispose of their overstocked inventory at very low prices to companies that specialize in inventory recycling. For example, a well-known e-commerce platform is famous for its low prices. The reason why many products are low is that most of them are not Good products or severely overstocked products.
How to judge whether the water cup you purchased is a seriously overstocked product? We have to judge from the silicone part on the water cup. Some water cup lids are covered with silicone, and some have the cup body covered with silicone. If you can’t find silicone on the surface, friends can Pull out the silicone ring for pseudo-sealing and check. The most obvious way in which water bottles that have been overstocked for a long time is the silica gel falling off. This kind of product must be a long-term backlog, and the same goes for white silicone that turns yellow and becomes dark. As for the silicone sealing ring that will break when you pull it, that is the most serious, whether it is the silicone falling off or turning yellow and dark. The editor recommends not to use them. Due to differences in temperature and humidity in long-term storage, although some hard plastics such as PC and AS cannot be seen from the surface, the performance and quality of the water cup have actually declined.
Finally, I hope that the content I share every time will be helpful to everyone. I also hope that friends who like the article will pay attention to our website https://www.yami-recycled.com/. We always welcome friends’ messages to ellenxu@jasscup.com, especially some questions about water cups. You are welcome to raise them and we will take them seriously. One answer.
Post time: Jan-22-2024