Are plastic products safe to use
Boy, do you have a glass bottle in your shop? On November 3, Ms. Wang for grandson in maternal and child stores bottles of choose and buy, although the salesperson introduced her as much money from the famous brand of plastic bottles, wang is still determined to choose a glass bottle. Ms. Wang said that before the bottle was used to boil and disinfect with boiling water, the daughter-in-law was saying that the plastic milk bottles were heated and they were volatile. "Are plastic products safe? Can they be used for heating?" Ms. Wang said she was confused.
What are the components of plastic
From 1 to 7 represent different materials
Plastic products are ubiquitous in everyday life, but like ms wang, many citizens know little about the basic knowledge of plastic products. The author interviewed 20 citizens in supermarkets and residential communities, and found that 80 percent of the public use plastic products in their daily lives, but it is not safe to know how to use plastic materials and how to use them.
"According to the regulations, there is a triangular sign with an arrow on the normal plastic ware. There is a number in the triangle, which is defined from 1 to 7 and the range of usage is defined." Jinhua entry-exit inspection and quarantine bureau dongyang office staff introduced.
Number 1 for main manufacture material for pet (polyethylene terephthalate oxalic ester), commonly used to make the beverage bottle, it can heat 70 ℃, with high temperature liquid or heating is easy to deformation, lead to harmful substances RongChu, not suitable for recycling.
Number 2 for hdpe (high density polyethylene), suitable for cleaning supplies, bath products, etc., resistant to high temperature of 110 ℃, but usually not clean, become a hotbed of bacteria, it is best not to recycle.
The number 3 is PVC (PVC), mainly used for building materials, raincoats, etc., rarely used in food packaging, which can produce harmful substances at high temperature.
Figure 4 for ldpe (low density polyethylene), used in the manufacture of cling film, plastic products, heat resistance is not strong, more than 110 ℃ hot melt phenomenon would appear, leave some of the human body cannot decompose plastic preparation, therefore, physical objects into the microwave, first remove the wrapped in plastic wrap.
The number 5 for pp (polypropylene), resistance to high temperature of 130 ℃, is the only state that can be used in the microwave, can be reused after careful cleaning, but some microwave boxes box body with 5 pp manufacture, lifted the lid with a pet or ps, so can't together with the box body into the microwave oven.
Figure 6 for ps (polystyrene), is often used to make bowl of instant noodles box, snack box and so on, the material can't into the microwave oven, also cannot be used to install acid (such as orange juice), strong alkaline substances, because will break down the polystyrene is bad for the body. As a result, food should be avoided by putting hot food in a box of fast food or putting a bowl of instant noodles into the microwave.
Number seven for PC (polycarbonate), used to produce the kettle, bottles, space cup, etc., due to incomplete reaction and so on in the process of production, manufacturing plastic containers of this material easy to release toxic substance bisphenol a, should try to avoid using this material to make plastic containers holding food.
Safe use of plastic products
Therefore, it is generally accepted that the bottles made of pp materials are safe and can be heated and reused. Inspection and quarantine staff reminded people that drinking hot drinks should not be used plastic straws, and the more deeply colored straw, the less safe; The beverage bottle should not be exposed to the sun or long-term circulation; Use the supermarket gift plastic cup to pay attention to the correct use after separating the material; Refrigerate, frozen food in the use of plastic wrap or plastic bags, instead of ordinary plastic bags; Color plastic bags are banned directly from the food, avoiding the chemical composition of the plastic due to oil or heat.
