What do the symbols on the bottom of plastic water bottles represent?

The numbers and symbols on the bottom of plastic water bottles are markings used by manufacturers to identify the bottle’s material, production date, production location, and production batch. These marks are very important to consumers because they help them understand the quality and safety of the bottles and whether they comply with relevant standards and regulations.

I. Digital Marking

1. Material identification:  The numbers 1-7 on the bottom represent the type of plastic material used in the bottle. From 1-7 are PET (polyethylene terephthalate), HDPE (high-density polyethylene), PVC (polyvinyl chloride), LDPE (low-density polyethylene), PP (polypropylene), PS (polystyrene), PC and other categories. Of these 7 types of markings, only the 5th PP material and the 7th PC and others are the grades commonly used in water bottles. The performance and characteristics of each material are different, so consumers can choose the right material according to their needs.

2. Production date identification: The numbers or letter combinations on the bottom represent the production date of the bottle. Usually the order of the year, month and day, for example, January 1, 2022 can be expressed as 220101. these signs can help consumers understand the shelf life and service life of the bottle.

3. Production batch identification: The numbers or letter combinations on the bottom can also indicate the production batch of the bottle. These marks can help manufacturers track and manage product quality, as well as recall and disposal operations.

Ⅱ. Symbol Identification

1. Triangle symbol: The triangle symbol on the bottom represents that the bottle can be recycled. The numbers 1-7 inside the triangle indicate the type of plastic material used in the bottle, and consumers can choose the correct recycling method according to the numbers.

2. Food-grade symbol: The food-grade symbol on the bottom means that the bottle meets food-grade safety standards and can be used without worry.

3. Weight symbol: The weight symbol on the bottom represents the weight of the bottle. These marks can help consumers understand the weight and capacity of the bottles so that they can choose the right bottle.

4. Trademark symbol: The trademark symbol on the bottom represents the manufacturer’s trademark or brand. These symbols can help consumers understand the brand and manufacturer of the bottle, as well as the quality and credibility of the product.

In summary, the numerical and symbolic marks at the bottom are very important for consumers to understand the material, production date, production location, production batch, weight, brand and other information about the bottle. Consumers can choose the right bottle based on this information to ensure the safety and quality of use. Meanwhile, consumers should also recycle plastic bottles properly to reduce the impact on the environment.

In addition to numerical and symbolic marks, there may be other markings on the bottom, such as the production license number and ISO certification mark. These marks can help consumers further understand the quality and safety of the bottles.

The production license number is issued by the national quality supervision, inspection, and quarantine department, and indicates that the manufacturer is allowed to produce and sell a specific type of product. Consumers can check the production license number to see if the manufacturer of the bottle is qualified to produce and sell the product.

The ISO certification mark indicates that the manufacturer has passed the ISO international quality management system certification, which means that the manufacturer has adopted a strict quality management system to ensure the quality and safety of the product. Consumers can check the ISO certification mark to see if the manufacturer of the bottle has a high level of quality management capability.

In addition to the bottom logo, consumers can also judge the quality and safety of the bottles in other ways, such as checking the appearance and feel of the bottles, and smelling the bottles to see if there is any odor. Taking these factors into consideration, consumers can choose the right bottle to ensure the safety and quality of use.

In conclusion, the numerical and symbolic marks on the bottom are an important way for consumers to understand the quality and safety of the bottles, and consumers can use these marks to choose the right bottles. At the same time, consumers should also recycle plastic bottles correctly to reduce the impact on the environment and make their own contribution to the cause of environmental protection.