Q:Do vacuum packing bags have to be vacuum packed?

Vacuum packaging bags and vacuum packaging machines are related. Vacuum packaging machine not only can complete vacuum extraction, but also can complete heat sealing packaging in vacuum, and ensure vacuum in vacuum bag can meet the requirement.

Q:How many kinds of packing bags are there in the packaged foods?

PE's softness and mechanical properties are worse than those of PP. It represents shopping bags, plastic wrap, garbage bags and so on.PP is stiffer, anisotropic (with a notch that is easily ripped), has good mechanical properties, and is superior to PE in high-temperature performance, representing bread bags.I wonder if this answer has met your requirement.

Q:Dried fish vacuum packaging packing bag can not puncture

Anti piercing vacuum packaging bags, first of all, choose the material of the bag to have toughness, followed by the thickness of the bag

Q:What kind of material is the packing bag of ceramic tile?

The general is the use of a three paper membrane material, can play a waterproof effect, and not easy to damage, for this paper packaging, you can also consult some packaging manufacturers to see, for example, Hengyi Lihong, sincerity of these packaging manufacturers.

Q:Three layer coextrusion material for packaging bags

Three layer co extruded films composed of outer layer of high mechanical strength polyester or polypropylene, elastic material mixed or SEBS intermediate layer is polypropylene with different proportion (SEBS), mixed layer is polypropylene copolymers with SEBS.

Q:How to evaluate the quality of a food packaging bag design? From what angle?

Most importantly, the design of this package has a direct sensory connection to this product. Let's take a simple example, moon cake, which is a more common packing, is packed in a plastic bag and can only buy a few dollars, but it will appreciate a lot more when it is put into the gift box. It's in the bag. Moon cake is just food. In the gift box, it becomes a gift. Before consumers buy, the product is analyzed as a food or a gift, which is the most important message that the mooncake package conveys to the consumer.

Q:Is the color of cement packing bags related to cement?

Portland ash cement, fly ash, silicate sleep and composite Portland cement -- black or blue.The cement packing bags shall clearly indicate the standards of implementation, cement varieties, codes, strength levels, producers' names, production licence marks (QS) and serial numbers, serial numbers, date of packing and net contents.

Q:Is the packet in the food package a reducing agent or an oxidizing agent?

Take active ferric antioxidants as an example;Due to the activity of iron is extremely fine powder, high surface area, the rate of reaction with oxygen is faster. Reduced iron powder. In general, the reaction equation is 4Fe+3O2+6H2O=4Fe (OH) 3, and iron corrosion reactions may also occur.Followed by iron powder particles will adsorption of these smaller food packaging bags in water, the water, in part from within the food, in part from nature. After absorbing most of the excess water, the relative humidity in the food package can be kept constant, which plays a very important role in controlling microbial pollution.

Q:Why is the higher the elevation, the more food bags inflate? From a physical point of view

The higher the altitude, the thinner the air outside, the lower the air pressure; and the air pressure inside the food bag is high, which causes the food bag to drum up. As the height gets higher, the air pressure outside may be lower, and food bags are likely to burst because of the pressure inside and outside

Q:What are the advantages and disadvantages of OPP and CPP membranes? What kind of bags are they used for?

(steaming film) CPP, good heat resistance. Because the softening point of PP is about 140 DEG C, this kind of film can be used in hot filling, retort bags, aseptic packaging and other fields. With acid, alkali, grease resistance, making it bread products, packaging or laminated materials and other fields of choice. Its contact with food safety, demonstration of good performance, will not affect the flavor of the built-in food, and can choose different grades of resin to obtain the desired characteristics.