I have a plastic water cup with a sign on the bottom. There are two "T" s in a regular triangle, one in the upper left corner and the other in the lower right corner. What does this mean?

Is this a sign? If this symbol represents the material of plastic raw materials, it is a safety level.

The numbers in the triangle sign at the bottom of the plastic bottle, from 1 to 7, respectively represent the safety grade of plastic. I haven't seen a trademark printed with "T⊥". Is there something wrong? Please take a closer look ~ If I provide the above picture, it will be the security level. If I didn't find such a logo for you, the following is a material introduction for reference only:

[No.1] Pet

Mineral water bottles, carbonated beverage bottles? Don't recycle hot water from beverage bottles? Usage: heat-resistant to 65℃, cold-resistant to -20℃, only suitable for warm or frozen drinks, high-temperature liquids, or heating to deform and dissolve harmful substances. Moreover, scientists have found that after 1 plastic products are used 10 months, DEHP, a carcinogen, may be released, which is toxic to testicles. ? Therefore, drink bottles should be thrown away when they are used up. They should not be used as drinking cups or as storage containers for other items, so as not to cause health problems.

"No.2" high density polyethylene

Cleaning products, bath products? Do not recycle if the cleaning is not thorough? Usage: It can be reused after careful cleaning, but these containers are usually not easy to clean, leaving the original cleaning supplies and becoming a hotbed of bacteria. You'd better not recycle them

No.3 polyvinyl chloride

At present, it is rarely used for food packaging, so it is best not to buy it? Usage: this material is easy to produce harmful substances at high temperature, and even it will be released during manufacturing. Toxic substances enter the human body with food, which may cause diseases such as breast cancer and birth defects of newborns. At present, containers made of this material are rarely used for packaging food. If it is in use, don't let it get hot.

"No.4" low density polyethylene

Plastic wrap, plastic film, etc. Plastic wrap is not wrapped on the surface of food. Use microwave oven: heat resistance is not strong. Usually qualified PE plastic wrap will melt when the temperature exceeds 1 10℃, leaving some plastic preparations that cannot be decomposed by human body. Moreover, food is wrapped and heated with plastic wrap, and the oil in food can easily dissolve the harmful substances in plastic wrap. Therefore, before putting food into the microwave oven, you must first remove the wrapped plastic wrap.

"No.5" PP

Microwave lunch box, crisper? Because microwave lunch boxes generally use PP (polypropylene, high temperature resistance 120℃, low temperature resistance -20℃) for microwave ovens, because of cost reasons, lids are generally not used. When put into the microwave oven, the cover must be removed before use. Because all kinds of bayonet fresh-keeping boxes use transparent PP instead of special PP, they can't be put into the microwave oven. ? Usage: The only plastic box that can be put into the microwave oven can be reused after careful cleaning. It should be noted that some microwave lunch boxes are indeed made of No.5 PP, but the lid is made of No.0/kloc-PET. Because PET is not resistant to high temperature, it can't be put into the microwave oven with the box. To be on the safe side, open the lid before putting the container in the microwave oven.

No.6 PS

Bowl of instant noodles box, fast food box? Don't cook a bowl of instant noodles in the microwave oven? Usage: it is heat-resistant and cold-resistant, but it can't be put into the microwave oven to avoid releasing chemicals when the temperature is too high (it will be released when the temperature is 70℃). And it cannot be used to load strong acids (such as orange juice) and strong alkaline substances, because it will decompose polystyrene which is unfavorable to human body and easy to cause cancer. Therefore, you should try to avoid packing hot food in fast food boxes.

No.7 personal computer

Other categories: kettle, water cup, milk bottle? Will PC glue release bisphenol A when heated? Uses: A widely used material, especially in milk bottles, is controversial because it contains bisphenol A. Lin Hanhua, an associate professor in the Department of Biochemistry of City University of Hong Kong, said that in theory, as long as bisphenol a 100% is converted into plastic structure in the process of manufacturing PC, it means that the product contains no bisphenol A at all, let alone released. However, if a small amount of bisphenol A is not converted into the plastic structure of PC, it may be released into food or drink. Therefore, when using this kind of plastic container, we should be especially careful. ? Cleaning measures to deal with bisphenol A? The higher the temperature, the more bisphenol A remaining in PC is released and the faster it is. Therefore, PC water bottles should not be used to hold hot water, so as not to increase the release speed and concentration of bisphenol A (if any). If your kettle number is 7, the following methods can reduce the risk: ● Do not heat it when using it. ? ● Do not use dishwasher or bowl dryer to clean the kettle. ? ● Don't let the kettle be exposed to direct sunlight. ? ● Before the first use, wash it with baking soda powder and warm water and dry it naturally at room temperature. Because bisphenol A will release more during the first use and long-term use. ? ● If the container is injured or damaged, it is recommended to stop using it, because if there are tiny pits on the surface of plastic products, it is easy to hide bacteria. ? ●? Avoid reusing aging plastic appliances. ? Plastic name-code and corresponding abbreviation code are as follows:? Polyester fiber? 01-pet? (Bott bottle)? High density polyethylene? 02— High density polyethylene? Pvc-？ 03—PVC？ Low density polyethylene? 04— Low density polyethylene? Polypropylene? 05—PP？ (Can withstand temperatures above 100 degrees)? Polystyrene-? 06—PS？ Heat resistance 60-70 degrees, hot drinks will produce toxins, and styrene will be released when burning? Other plastic codes-? 07— Other? Among them, PP, PE and PVC are abbreviations of English names. The Chinese name is polypropylene, polyethylene and polyvinyl chloride, and the English name is polypropylene, polyethylene and polyvinyl chloride? Chloride? Plastic additives, also known as plastic additives, are some compounds that must be added to improve the processability of polymers (synthetic resins) or the properties of resins themselves. For example, adding plasticizer to reduce the molding temperature of PVC resin and make the product soft; Another example is to add foaming agent to prepare lightweight, vibration-resistant, heat-insulating and sound-insulating foam plastics; The thermal decomposition temperature of some plastics is very close to the molding processing temperature, so it can't be molded without heating stabilizers. Therefore, plastic additives play a particularly important role in plastic molding.

Harm of plastic articles for daily use to health

Plastic cups are safer than paper cups? The temperature resistance of plastic product code 5 is 130 degrees. Can I put hot water in the microwave oven? The darker the straw, the less safe it is. Plastic straws shouldn't be used for hot drinks? Use disposable chopsticks as little as possible? How to use plastic bowls and imitation porcelain bowls? Don't use dark plastic bowls? Imitation porcelain tableware can't hold acid? Code of mineral water bottle and pure water bucket "1"? Plastic bottles can store dry goods? Water bottle code 5 is resistant to high temperature and can be reused? Qualified plastic lunch boxes are marked with "5" PP, and there are air holes on the box cover.