Inspection standards and methods for plastic water cups of Zhejiang Huajian Commodity Inspection Co., LTD Zhejiang Huajian Commodity Inspection Co., Ltd. is a third party inspection company, engaged in agent inspection, foreign trade inspection, business trip inspection, factory inspection, production tracking, container loading supervision. Our aim: safety, rest assured, commitment. Water is the source of life, water can promote human metabolism, help sweat, regulate body temperature, drinking water has become a lifestyle. In recent years, there have also been innovations in water cups, such as the "big belly Cup", an online celebrity cup, and the recently popular "Ton ton bucket". The "big belly cup" is popular with children and young people because of its cute shape, while the "Ton ton bucket" is innovative in that the bottle is marked with time and water volume scale, which is convenient to remind people to drink water in time. As an important drinking tool, how to choose when buying it? Main material of food grade water cup When purchasing a water cup, the most important thing is to see its material, which involves the safety of the whole water cup. The common plastic material on the market mainly has 4 kinds: PC (polycarbonate), PP (polypropylene), tritan (Tritan Copolyester copolyester), PPSU (polyphenylsulfoxide). 1. PC material PC itself is not toxic, but PC (polycarbonate) material is not resistant to high temperature, if heated or in an acid, alkaline environment, easy to release the toxic substance bisphenol A. Some research report shows that bpa causes endocrine disorders, cancer, metabolic disorders caused by obesity, are becoming is likely to be associated with bisphenol A, many countries such as Canada and early ban bisphenol A is added in the food packaging, and by 2011, China has banned imports of baby bottles and sale of PC material. If you choose PC water cups, please buy them from formal channels to ensure their production compliance. Personally, it is not recommended to buy PC water cups. 2. PP material PP polypropylene, colorless, odorless, non-toxic, translucent, does not contain bisphenol A, flammable, melting point 165℃, at 155℃ or so will soften, the use of temperature range of -30 ~ 140℃. PP tableware and 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 ills of plastics, including toughness, impact strength, hydrolysis stability, chemical resistance, high transparency, and does not yet have the bisphenol A found in PC. tritan has been certified by the Food Contact Notification (FCN) No.729 by the United States Food and Drug Administration, and is the designated material for infant products in Europe and the United States 4. The PPSU material PPSU (polyphenylsulfoxide) material is an amorphous thermal plastic, high temperature resistance 0℃~180℃, can be filled with hot water, has high permeability, high hydrolysis stability, is able to withstand steam disinfection of children's bottle material, does not contain carcinogenic chemical bisphenol A. For the safety of yourself and your family, please purchase the water cup from the formal channels, and carefully check the material composition when buying, which can be known from the following basic parameters: Method for inspection of plastic food grade water cups "Big belly cup", "ton ton bucket" and other water cups are made of plastic, and the common defects of plastic products are as follows: Miscellaneous point (containing impurities) : Having the shape of a point, measured with its maximum diameter as its size. Rough edge: A linear bulge on the edge or binding line of a plastic part (usually caused by poor molding). Silver wire: Gas formed during molding to fade the surface of plastic parts (usually white). Most of these gases Is the moisture in the resin, some resins are easy to absorb moisture, so a drying process should be added before manufacturing. Bubble: A barrier inside a plastic that creates a circular protrusion on its surface. Deformation: Deformation of plastic parts caused by differences in internal stress or poor cooling during manufacturing. Top WHITE: Whitening and deformation caused by EJECTING the finished product out of the die, usually at the other end of the slightly EJecting end (the mother die surface). Lack of material: Due to mold damage or other reasons, the finished product is not saturated and lack of material. Broken printing: printing due to impurities or other reasons caused by white spots in the printed font. Missing printing: printing content missing scratches or corners or fonts broken printing defects greater than 0.3mm, is also considered to have missed printing. Color difference: refers to the actual part color and admitted sample color or color number of the comparison beyond the acceptable value. The same color point: refers to the color and the part color is close to the point; Otherwise, it is a heterochromatic point. Streaks: Streaks of hot - dissolved plastic left at the gate as a result of forming. Weld mark: A linear mark on the surface of a part caused by the convergence of two or more streams of molten plastic. Assembly gap: A gap caused by the assembly of two components in addition to the gap specified in the design. Fine scratch: A surface scratch or mark without depth (usually caused by manual operation). Hard scratch: A deep linear welt on the surface of a part caused by a hard object or sharp object (usually by manual operation). Dent shrinkage: The appearance of a dent on the surface of a part or the size is less than the design size (usually due to poor molding). Color separation: Streaks or spots of color in the flow zone of plastic production (usually caused by the addition of recycled material). Invisible: IF THE DIAMETER OF THE DEFECT IS LESS THAN 0.03mm, IT IS NOT VISIBLE, EXCEPT FOR THE TRANSPARENT AREA OF THE LENS (ACCORDING TO THE DETECTION DISTANCE SPECIFIED BY THE MATERIAL OF EACH PRODUCT). Bruise: The surface or edge of the product is hit by a hard object. The above belongs to the appearance inspection of plastic water cup, identify the quality of water cup, but also need to carry out functional inspection