importance of water
Water is the source of life. Water can promote human metabolism, help perspiration, and regulate body temperature. Drinking water has become a living habit for people. In recent years, water cups have also been constantly innovating, such as the Internet celebrity cup “Big Belly Cup” and the recently popular “Ton Ton Bucket”. The “Big Belly Cup” is favored by children and young people because of its cute shape, while the innovation of the “Ton-ton Bucket” is that the bottle is marked with time and drinking water volume scales to remind people to drink water in time. As an important drinking water tool, how should you choose when buying it?
Main materials of food grade water cups
When purchasing a water cup, the most important thing is to look at its material, which involves the safety of the entire water cup. There are four main types of common plastic materials on the market: PC (polycarbonate), PP (polypropylene), tritan (Tritan Copolyester copolyester), and PPSU (polyphenylsulfone).
1. PC material
PC itself is not toxic, but PC (polycarbonate) material is not resistant to high temperatures. If it is heated or placed in an acidic or alkaline environment, it will easily release the toxic substance bisphenol A. Some research reports show that bisphenol A can cause endocrine disorders. Cancer, obesity caused by metabolic disorders, premature puberty in children, etc. may be related to bisphenol A. Many countries, such as Canada, have banned the addition of bisphenol A in food packaging in the early days. China also banned the import and sale of PC baby bottles in 2011.
Many plastic water cups on the market are made of PC. If you choose a PC water cup, please purchase it from regular channels to ensure that it is produced in compliance with regulations. If you have a choice, I personally do not recommend buying a PC water cup.
2.PP material
PP polypropylene is colorless, odorless, non-toxic, translucent, does not contain bisphenol A, and is flammable. It has a melting point of 165°C and will soften at around 155°C. The use temperature range is -30~140°C. PP tableware cups are also the only plastic material that can be used for microwave heating.
3.tritan material
Tritan is also a chemical polyester that solves many of the shortcomings of plastics, including toughness, impact strength, and hydrolytic stability. It is chemical-resistant, highly transparent, and does not contain bisphenol A in PC. Tritan has passed FDA certification (Food Contact Notification (FCN) No.729) of the U.S. Food and Drug Administration and is the designated material for infant products in Europe and the United States.
4.PPSU material
PPSU (polyphenylsulfone) material is an amorphous thermoplastic, with high temperature resistance of 0℃~180℃, can hold hot water, has high permeability and high hydrolysis stability, and is a children’s bottle material that can withstand steam sterilization. Contains the carcinogenic chemical bisphenol A.
For the safety of yourself and your family, please purchase water bottles from regular channels and carefully check the material composition when purchasing.
Food grade plastic water cup inspection methodWater cups such as “Big Belly Cup” and “Ton-ton Bucket” are all made of plastic. Common defects of plastic products are as follows:
1. Miscellaneous points (containing impurities): have the shape of a point, and its maximum diameter is its size when measured.
2. Burrs: Linear bulges at the edges or joint lines of plastic parts (usually caused by poor molding).
3. Silver wire: The gas formed during molding causes the surface of plastic parts to discolor (usually white). Most of these gases
It is the moisture in the resin. Some resins easily absorb moisture, so a drying process should be added before manufacturing.
4. Bubbles: Isolated areas inside the plastic create round protrusions on its surface.
5. Deformation: Deformation of plastic parts caused by internal stress differences or poor cooling during manufacturing.
6. Ejection whitening: The whitening and deformation of the finished product caused by being ejected from the mold, usually occurs at the other end of the ejection bit (mother mold surface).
7. Material shortage: Due to damage to the mold or other reasons, the finished product may be unsaturated and lack material.
8. Broken printing: White spots in printed fonts caused by impurities or other reasons during printing.
9. Missing printing: If the printed content is missing scratches or corners, or if the font printing defect is greater than 0.3mm, it is also considered to be missing printing.
10. Color difference: refers to the actual part color and the approved sample color or color number exceeding the acceptable value.
11. Same color point: refers to the point where the color is close to the color of the part; otherwise, it is a different color point.
12. Flow streaks: The flowing streaks of hot-melt plastic left at the gate due to molding.
13. Weld marks: Linear marks formed on the surface of a part due to the convergence of two or more molten plastic streams.
14. Assembly gap: In addition to the gap specified in the design, the gap caused by the assembly of two components.
15. Fine scratches: surface scratches or marks without depth (usually caused by manual operation).
16. Hard scratches: Deep linear scratches on the surface of parts caused by hard objects or sharp objects (usually caused by manual operations).
17. Dent and shrinkage: There are signs of dents on the surface of the part or the size is smaller than the design size (usually caused by poor molding).
18. Color separation: In plastic production, strips or dots of color marks appear in the flow area (usually caused by the addition of recycled materials).
19. Invisible: means that defects with a diameter less than 0.03mm are invisible, except for the LENS transparent area (according to the detection distance specified for each part material).
20. Bump: caused by the product surface or edge being hit by a hard object.
Post time: Aug-15-2024