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Five packaging principles and storage methods?

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1. Wrapping: use thin flexible packaging materials and other composite flexible packaging materials to completely or partially seal the packaged articles

wrapping process: according to the wrapping operation mode, it can be divided into manual operation, semi-automatic operation and full-automatic operation; According to the form of wrapping, it can be divided into folding wrapping and kinking wrapping. In addition, shrink packaging and stretch packaging also belong to the category of wrapping

packing process: according to the degree of automation of packing, manual packing, semi-automatic (taking blank, unpacking and sealing are manual operations) and full-automatic packing; According to the way of product loading, it is divided into packing process (vertical packing method: drop packing process, lifting packing process, pinch packing process; horizontal packing method), wrapped packing process and sleeved fashion box process (single sleeved packing and collective sleeved packing)

2 Blister packaging:

refers to a packaging method in which the product is sealed between the blister formed by transparent plastic sheet and the bottom plate (paperboard, plastic film or sheet, aluminum foil or their composite materials). (typical process: sheet heating → film forming → filling → substrate installation → heat sealing → trimming. Materials: plastic film sheet, substrate and coating materials.) Body fitted packaging: it is a packaging method in which the product is placed on a breathable bottom plate made of cardboard or plastic sheet (film), which is covered with heated and softened plastic sheet, and the sheet (film) is tightly wrapped and sealed on the floor through vacuum pumping through the bottom plate. (process: the roll plastic film is clamped by the clamping frame, and the upper heater heats the film. The article is placed on the substrate and sent to the vacuum pumping platform; the heater presses the softened film on the article and starts vacuumizing; after vacuumizing, the film is tightly adsorbed on the article and sealed with the substrate to form a complete package, and the heater stops heating; complete The package was sent out. Equipment: substrate supply device, plastic film extrusion head, vacuum pumping device, slit cutter and cutter.)

difference between blister packaging and body fitted packaging:

① commodity protection: Blister packaging has barrier performance and can be vacuum packaged; The substrate of body fitted packaging has vacuum holes and has no barrier

② packaging operation: Blister packaging is easy to realize automation or assembly line production, but the mold needs to be replaced, which is suitable for packaging production with small varieties and large quantities; Body fitted packaging is difficult to realize automation or assembly line production, and the production efficiency is low, but there is no need to replace the mold. It is suitable for multi variety and mass packaging production

③ packaging cost: the packaging materials and equipment of blister packaging are relatively expensive. For large, heavy and small batch items, the cost is higher due to the need to make molds; Body fitted packaging is generally cheaper, but it requires more labor, and the cost is higher in mass packaging production

④ packaging effect: Blister packaging is relatively beautiful, which can improve the value of goods; The appearance of body fitted packaging is slightly inferior because there are vacuum holes on the substrate

difference between shrink packaging and stretch packaging:

⑴ adaptability to products

① shrink packaging is not suitable for frozen or heated items, while stretch packaging is not subject to this restriction

② shrink packaging can wrap the articles on the tray, while stretch packaging only wraps the articles on the tray

⑵ adaptability to circulation environment

① from the storage place of packaging, shrink packaging is not afraid of the sun and rain. It can be stored in the warehouse or in the open air, so the warehouse area can be saved; Stretch packaging can only be stored in the warehouse because the film will relax due to sunlight or high temperature weather

② from the perspective of moisture resistance and air permeability of transportation packages, the shrink packaging is sealed on six sides, which has good moisture resistance and poor air permeability; Stretch packaging is generally only wrapped around the package, and sometimes the top surface can be wrapped. The overall moisture resistance is slightly poor, but the air permeability is good

③ from the operating environment, shrink packaging should not be operated under low temperature conditions, while stretch packaging has no such restriction

⑶ equipment investment and packaging cost. Shrink packaging requires heat shrinkable equipment, which has high equipment investment and maintenance costs, high energy consumption and material costs, and long equipment recovery period; Stretch packaging does not need heating, with lower equipment investment and maintenance costs, less energy consumption, 25% less material consumption than shrink packaging, and shorter investment payback period

⑷ packaging stress: shrink packaging is not easy to control, but relatively uniform; Stretch packaging is easy to control, but the stress at the corner is too large and vulnerable

⑤ stacking adaptability: shrink packaging has good adaptability. Stretch packaging has poor stacking performance because the film has self adhesion, the packages are easy to bond and tear during handling

(6) requirements for inventory films: shrink packaging requires films of various thicknesses, while stretch packaging can be used for different items as long as there is a film of one thickness

spray tank spray principle: liquid, cream or powder and other internal and propellants are loaded into a hermetic container with valves. When opening valves, the inner parts are ejected under the pressure of the advancing gold, and can be used. br>
3. The filling process

can be divided into atmospheric filling (Baijiu, fruit wine, soy sauce, milk, potion), pressure canning and vacuum filling (fruit juice, jam, syrup, oil, pesticide) according to different filling pressure. According to different measurement methods, liquid level filling and volume filling can be divided.

shockproof packaging, also known as buffer packaging, plays an important role in various packaging methods. From production to use, products need to go through a series of transportation, storage, stacking and loading and unloading processes and be placed in a certain environment. In any environment, it will effectively act on the product and cause mechanical damage to the product. In order to prevent products from being damaged, we should try to reduce the impact of external forces. The so-called shockproof packaging refers to the packaging with certain protective measures taken to slow down the impact and vibration of the contents and protect them from damage. There are three main methods of shockproof packaging:

(1) comprehensive shockproof packaging method. The comprehensive shockproof packaging method refers to the shockproof packaging method in which all the shockproof materials are filled between the inner contents and the outer packaging

(2) some shockproof packaging methods. For products with good integrity and products with inner containers, shockproof materials can be used only at the corners or local places of the products or inner packaging. The main packaging materials include foam plastic shockproof pad, inflatable plastic film shockproof pad and rubber spring. Br>
(3) suspension shockproof packaging method. For some valuable and vulnerable items, in order to effectively ensure that they will not be damaged in the process of circulation, the outer packaging container is relatively strong, and then
the loaded items are suspended in the packaging container with ropes, belts, springs, etc. in the logistics, no matter what the operation link is. The contents are stably suspended without collision with the packaging container, so as to reduce damage

2. Anti damage protection technology

buffer packaging has strong anti damage ability, so it is an effective type of anti damage packaging technology. In addition, the following anti damage protection technologies can be adopted:

(1) binding and wrapping technology. The function of strapping and wrapping technology is to make the groceries and bulk cargo form a solid whole, so as to increase the integrity, facilitate handling and prevent bulk stacking to reduce damage

(2) container technology. Container loading is used to reduce the contact with the cargo body, so as to prevent damage

(3) select high-strength protective materials. The high strength of the outer packaging material can prevent the inner contents from being damaged by external forces

3. Antirust packaging technology

(1) antirust oil antirust packaging technology. Atmospheric corrosion is the result of electrochemical action caused by oxygen, water vapor and other harmful gases in the air on the metal surface. If the metal surface is isolated from various factors causing atmospheric corrosion (i.e. the metal surface is protected), the purpose of preventing atmospheric corrosion of metal can be achieved. Anti rust oil packaging technology is based on this principle to seal the metal to prevent corrosion

to encapsulate metal products with antirust oil, the oil layer shall have a certain thickness, good continuity of the oil layer and complete coating. Different types of antirust oil shall be coated by different methods

(2) vapor phase antirust packaging technology. Vapor phase antirust packaging technology is the technology of antirust treatment of metal products in sealed packaging containers with vapor phase inhibitor (volatile inhibitor). Vapor phase corrosion inhibitor is a substance that can slow down or completely stop the destruction process of metal in corrosive medium. It is volatile at room temperature. In the sealed packaging container, the corrosion inhibitor gas volatilized or sublimated in a very short time can fill every corner and gap in the whole packaging container and adsorb on the surface of metal products at the same time, So as to inhibit the corrosion of metal by atmosphere

4. Anti mildew and rot packaging technology

when transporting food and other organic carbohydrate goods in the transportation package, mold may grow on the surface of the goods. In case of moisture in the circulation process, the mold will grow and reproduce very fast, and even extend to the interior of the goods, causing it to rot, mold and deteriorate. Therefore, special protective measures should be taken

the measures to prevent mildew, rot and deterioration of packaging are usually frozen packaging, vacuum packaging or high-temperature sterilization. The principle of frozen packaging is to slow down the process of bacterial activity and chemical changes in order to prolong the storage period, but it can not completely eliminate the deterioration of food; High temperature sterilization can eliminate the microorganisms causing food decay, and can be treated with high temperature to prevent mildew in the packaging process. For some dried food packages, water vapor immersion should be prevented to prevent mildew and rot. packaging materials with waterproof steam and good air tightness can be selected, and vacuum and inflatable packaging can be adopted

vacuum packaging method is also called decompression packaging method or exhaust packaging method. The package can prevent the external water vapor from entering the packaging container, and can also prevent the moist air inside the sealed moisture-proof package from condensing when the temperature drops. When using vacuum packaging method, pay attention to avoid excessive vacuum. To prevent damage to the packaging materials

to prevent the goods in the transportation package from getting moldy, we can also use anti mildew agents. There are many kinds of anti mildew agents. Non toxic anti mildew agents must be used for food

for large enclosed boxes of mechanical and electrical products, corresponding anti mildew measures such as ventilation holes or ventilation windows can be set up as appropriate

5. Insect proof packaging technology

insect repellent packaging technology is commonly used, that is, put drugs with certain toxicity and smell in the packaging, and use the volatile gas of drugs in the packaging to kill and drive away various pests. Commonly used insect repellents include tea, para dichlorobenzene, camphor, etc. Vacuum packaging, inflatable packaging, deoxidation packaging and other technologies can also be used to make pests have no living environment, so as to prevent pests

6. Dangerous goods packaging technology

there are thousands of kinds of dangerous goods. According to their dangerous nature, the transportation and public security fire department stipulates that they are divided into ten categories, namely explosive goods, oxidants, compressed and liquefied gases, spontaneous combustion goods, water burning goods, flammable liquids, flammable solids, toxic goods, corrosive goods, radioactive goods, etc, Some items have more than two dangerous properties at the same time

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