Jiangsu Provincial Consumer Protection Committee tested the fresh-keeping film and fresh-keeping bags

How about the safety performance, performance and cost performance of plastic wrap and fresh-keeping bags? Recently, the comparison test results of plastic wrap and fresh-keeping bags announced by Jiangsu Consumer Protection Committee show that if PVC plastic wrap comes into contact with food with oil, it will precipitate more chemical substances that pose a hazard to human heal.

The samples for this comparative test were purchased by Jiangsu Consumer Protection Committee staff from five physical supermarkets in Suzhou and Nanjing, as well as four e-commerce platforms including Tmall, .

The comparative test samples were commissioned by Jiangsu Provincial Institute of Product Quality Supervision and Inspection to test and compare the hygiene performance indicators (items 1-5) and performance (items 6-10) that consumers are concerned about according to relevant national standar.

The total migration of 6 batches of PVC plastic wrap in contact with grease exceeded the standard

The total migration index is to assess the amount of chemical substances that may be precipitated when the plastic wrap and plastic bag are in contact with water, vinegar, wine, oil and other substances during u.

The comparative test results show that when 60 batches of products are exposed to acid simulants and alcohol simulants with a concentration value of less than 20%, the total migration test results meet the national standar.

3 batches of fresh-keeping bags were damaged

Among the 30 batches of fresh-keeping bags, there are 21 batches of continuous roll bags, of which 3 batches of fresh-keeping bags were torn and damaged during the te.

The length of 5 batches of plastic wrap does not match the label

Among the 60 batches of samples purchased in this comparison test, 5 batches of PVC plastic wraps purchased from e-commerce platforms did not match the length marked on the promotional page of the web page, and the actual lengths of some plastic wraps were close to one anoth.

1 batch of product standard labeling error

This comparative test found that the labels of fresh-keeping bags and fresh-keeping films have some problems: First, the microwaveable information is not comprehensive, and the heating temperature is not marked, but only "Microwave Suitable"; Second, the warning information is not comprehensive, and the heating time is not mark.

The strength of PVDC is the best, and the self-adhesiveness of PVC is better

The strength value includes tensile strength and right-angle tear streng.

This comparative test found that the strength of polyvinylidene chloride (PVDC) material is the best, followed by polyvinyl chloride (PVC), and polyethylene (PE) material is the wor.

Self-adhesion refers to the adhesion of the plastic wrap itself, which reflects the firmness of the wrapped food in the actual use proce.

        The fresh-keeping bag is not suitable for carrying

        Many consumers encounter such a situation that a hole is popped out of the fresh-keeping bag just after a box of yogurt is placed in it; the seal at the lower part of the fresh-keeping bag leaks after packing food in the fresh-keeping bag or carrying it for a whi.

        The test found that the thickness of the ziplock bag is about 05mm, which is about 5 times that of ordinary household fresh-keeping bags, and the sealing strength exceeds 10N, which can be used for short-distance food carrying; while the thickness of ordinary household fresh-keeping bags is only about 01.

        PE clip chain ziplock bag has better water vapor barrier performance

        One of the biggest uses of fresh-keeping film and fresh-keeping bags is for consumers to package fresh vegetables or fruits, e.

        The water vapor barrier performance is mainly to investigate the entry of external water vapor into the package after the food is packaged, and also to prevent the moisture inside the package from penetrating o.

        Oxygen is one of the main reasons for the deterioration of the quality of many foods during stora.

        Therefore, when choosing packaging materials for moisture-sensitive foods such as coffee, tea, dried fruits, e.

, it is necessary to choose a zip-lock bag with better water vapor barrier properties for storage; while for tomatoes, apples, bananas and other fruits and vegetables because they themselves will release The ripening agent (ethylene) should be placed in a fresh-keeping bag for fruits and vegetables with good air permeability and moisture retention, and then stored in the refrigerat.

        Consumer Alert

        The Jiangsu Provincial Consumer Protection Committee hereby reminds consumers that PVC plastic wrap is likely to produce harmful substances such as plasticizers when it comes into contact with greasy food, which affects their heal.

Bring your own packagi.

        In addition, consumers should pay attention to the following points:

         Try to buy self-adhesive fresh-keeping film or fresh-keeping bag made of PE material, not only to pay attention to the price, but also to pay attention to the integrity of the product label or description;

         Use it according to the temperature range specified on the product packagi.

If the food needs to be heated, choose a plastic wrap with strong heat resistance, and try to avoid direct contact with oily food;

         Do not reuse the plastic wrap that should be used once, and do not allow the plastic wrap to come into direct contact with food for a long time;

         For the plastic wrap not marked "Microwaveable", do not use the microwave to heat it; for the plastic wrap marked for microwave heating, pay attention to prevent the use of high temperature due to improper heating methods and lead to changes in chemical or physical properties;

         Because some fruit shops, delicatessen stores or supermarkets will use PVC plastic wrap to pack food, for cooked food containing oil, it is recommended that consumers take it out in time, and do not bring plastic wrap for heating;

         For fruits and vegetables that will release ripening agents (ethylene), such as tomatoes, apples, e.

, it is recommended to put them in a fresh-keeping bag with good air permeability and moisture retention, and then put them in the refrigerator for storage; and the fresh-keeping film made of PVDC is moisturizi.

The performance is relatively good, and it can moderately ensure the fresh-keeping period of vegetables and frui.