As a daily necessities, cling film is well known to the people and brings a lot of convenience to our lives. But what are the materials of cling film? What brand is better? Generally speaking, everyone is more concerned about the problem. Nowadays, the plastic wrap film on the market is especially popular, so how about the Miaojie plastic wrap? We listen to how professionals can answer these questions. .
     How about Miaojie plastic wrap, first let's take a look at the plastic wrap material. Compared with the original standard, the new standard is extended from self-adhesive plastic wrap made of polyethylene (PE) to cling film made of other materials, including polyethylene (PE), polyvinyl chloride (PVC), A resin such as polyvinylidene chloride (PVDC) is a self-adhesive cling film produced by a single-layer extrusion or multi-layer coextrusion production process. Among them, polyethylene (PE) plastic wrap is widely used in food packaging and can be used for fat food. Most of the semi-finished products purchased in supermarkets use this kind of packaging. It has good moisture resistance and permeability, and is suitable for packaging short-term storage of peanuts. , biscuits, fresh fruits, etc., but its gas barrier properties are poor, it is not suitable for packaging foods that are resistant to gas barriers, especially those with high oxygen barrier requirements; plastic wraps made of polyvinyl chloride (PVC) can only be used limitedly. It can be used to package vegetables, fruits, etc., but can not directly package meat, cooked food and fat food, and can not be directly heated, not used at high temperature; plastic wrapper made of polyvinylidene chloride (PVDC) is used for packaging cooked food, ham, etc. Foods with high barrier performance requirements are less common in the retail market due to their high cost.
     According to the new standard, plastic wrap should identify the material or type of product, oxygen transmission rate, carbon dioxide transmission rate, moisture permeability and net weight. The cling film should be marked with the words for food; for PVC self-adhesive Preservative film (PVC) should be marked with warning signs such as “cannot be contacted with greased foodâ€, “not heated by microwave ovenâ€, “not for high temperature useâ€, etc. If the plastic wrap is nominally heated by microwave oven, it should be marked “can be used in microwave ovenâ€. Typeface and heating method, maximum temperature resistance and so on.
     When consumers buy PE or PVC cling film, in addition to looking at the product packaging logo, mastering certain methods, you can still identify the type.
1. The naked eye: PE material has poor transparency, white color, and the covered food looks blurry; PVC material has good gloss and looks clear and thorough.
2, with hand: PE material is relatively soft, easy to open after hand rub; PVC material has strong toughness, can greatly widen and stretch, but because of good adhesion, it is not easy to spread after hand rubbing, easy to stick In the hand.
3. Burn with fire: After the PE cling film is ignited, the flame is yellow, and the smell of burning the candle has the phenomenon of dripping oil. After leaving the fire source, it will continue to burn, tasteless; the PVC cling film is lit with fire and the flame is yellow-green, no drop The oil phenomenon will be extinguished after leaving the fire source, and there is a strong pungent smell.
     The above is about the introduction of Miaojie plastic wrap. The cling film plays an important role in our lives. When using it, we must choose a safe and reliable brand and use the cling film reasonably.
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