Is it better to use No. 5 plastic or No. 7 plastic for plastic water cups?

Today, I saw a friend leave a message in the article for consultation.The original text is to ask: Is it better to use No. 5 plastic or No. 7 plastic for the water cup? Regarding this issue, the editor has described in detail what the numbers and symbols at the bottom of the plastic water cup mean in several previous articles.Today, the editor will share with you about the 5th and 7th, and we will not repeat the other numbers.At the same time, friends who can ask questions about 5 and 7 are also very professional.

The number 5 at the bottom of the plastic water cup means that the body of the water cup is made of PP material.PP material is widely used in the production of plastic water cups, also because PP material has the characteristics of high temperature resistance.In the early days, many translucent plastic square boxes that could be heated in microwave ovens were made of PP.PP material has stable performance, and food grade is recognized by various countries and regions around the world.

Therefore, in the production of water cups, PP material is not only used for the material of the cup body.If friends pay attention, they will find that 90% of the plastic lids of plastic water cups, glass water cups and stainless steel water cups are made of PP.PP material is soft and has good temperature resistance. Even if it is taken out from minus 20 ℃ and immediately added with hot water of 96 ℃, the phenomenon of material chapping will not appear.However, if it is an AS material, there will be serious cracks and it will explode directly.Because the PP material is soft, the PP made of water cups is easy to cause scratches in use, whether it is the cup body or the cup lid.

The number 7 at the bottom of the plastic water cup is relatively more complicated.Because the number 7 not only represents the material, but also has another meaning to represent other plastic materials that are food-grade and safe.At present, the plastic water cups marked with the number 7 on the market usually represent these two materials, one is PC and the other is Tritan.Then the difference between these two materials can be said to be very large for the comparison of PP, which is the material of number 5.

Food-grade PCs are also more widely used in plastic water cups and plastic living utensils.But the PC material contains bisphenol A, which is released when the contact temperature exceeds 75°C.So why is it still used as a cup material?Usually manufacturers who use PC materials to produce plastic water cups will have clear remarks when selling.It should be noted that such water cups can only hold room temperature water and cold water, and cannot add hot water with a water temperature exceeding 75°C.At the same time, due to the relatively high permeability of PC material, the appearance of the produced water cup is thorough and more beautiful.

Compared with PP and PC, Tritan material is safer, healthier and more environmentally friendly.Tritan material does not contain bisphenol A, and has better temperature resistance. The toughness of the material is better than that of PC, and its hardness exceeds that of PP.It has stronger resistance to temperature difference, even adding 100 ℃ hot water will not produce bisphenol A.

Dongguan Zhanyi Commodity Technology Co., Ltd. specializes in the production of metal cups, plastic cups, coffee cups, suction mug, lunch boxes, food jar, travel mugs, portable water bottles, sports bottles, home life desktop trash cans, thermos bottles, etc.These products are all our annual exports, and are recognized and loved by the US, Europe, Australia, Japan, South Korea, Taiwan, Hong Kong and other consumers. Support for small quantity order, fast customization.