Large plastic logistics boxes with grid bottom support are widely used in fresh food distribution, factory material transportation, supermarket storage, fruit and vegetable harvesting and other scenarios. The gaps, grid holes, and base slots of the box are prone to retaining soil, food residue, oil stains, mold spots, insect eggs, and residual chemicals. Simple flushing cannot completely clean them, and residual stains can breed bacteria and contaminate the loaded goods over time. This guide combines the characteristics of a hollow mesh box, a heavy-duty base, and a stackable structure. From pre-processing to final maintenance, it is divided into 7 complete steps to refine the operation, taking into account two scenarios: small-scale cleaning at home and large-scale storage cleaning at the enterprise. Ordinary people can execute it on the ground without the need for professional equipment.
Step 1: Clear the disassembled parts+pre sort, and do a good job of stripping before cleaning (the core is to separate the detachable parts to avoid hiding dirt)
The first step is to empty the entire box, giving priority to dumping all residual goods, plastic bags, tape, and dry debris inside the box. For this box with a large area of vertical breathable mesh and bottom integrated tray feet, first check the box buckle, side movable baffle (some of the same logistics box side panels can be folded and disassembled), and remove all detachable movable baffles, plastic locks, and side sealing strips and collect them separately.
Subdivision operation:
Pre cleaning of dry materials
Invert the box and repeatedly bump the four corners of the box on an open ground (preferably cement ground, to avoid dirtying the lawn and indoor floor). Use vibration to make the sand, fruit shells, broken vegetable leaves, and gravel embedded in the grid gaps and base foot slots fall off. The grid hollow structure is a heavily polluted area, and small debris will get stuck in the vertical bar grid gaps. Use a hard short bristled brush (old shoe brush, steel wire brush) to dry brush the inner and outer surfaces of the grid first, without getting wet. The dry brush can first peel off 70% of the dry attachments;
Stain classification and sorting
Divide the box into three categories according to the type of stains and collect and stack them. ① Fresh fruit and vegetable residue (fruit stains, rotten vegetable leaves, fruit and vegetable mucus) box; ② Industrial oil stains, engine oil, and adhesive residue in the casing; ③ Dust, dirt, and other common dirt boxes are suitable for different stains with different cleaning agents. Mixing can easily cause cross adhesion of stains, increasing the difficulty of subsequent cleaning;
Environmental site selection
For large-scale storage and cleaning, priority should be given to open work areas with smooth drainage. The drainage outlet should be cleared in advance to prevent debris from blocking the sewer.
This step may seem simple, but many people directly flush and clean it. Dry residue turns into mud when it comes into contact with water and gets stuck in the gaps of the grid. The subsequent cleaning workload doubles, and sorting and classification can greatly improve the efficiency of subsequent cleaning, especially for large area grid logistics boxes. The hollow structure determines that intervention and treatment are essential.
Step 2: High pressure pre spray infiltration softens stubborn stains (using the permeability of water to dissolve dry attachments)
After completing the dry cleaning and sorting process, enter the pre flushing stage and spray targeted spray on the hollow grid of the box and the dead corners of the base:
Large batch version for warehousing
Low pressure mobile sprinkler pipes are selected, and the entire stack of boxes is disassembled and stacked. Single boxes are placed flat for spraying, and the batch is soaked for 15-25 minutes. For severely dry and oily boxes, the surface is simply sprayed with neutral degreasing solution and left to soak after spraying;
Key points for avoiding pitfalls
Do not directly rinse the plastic box with boiling water. High temperature boiling water will accelerate the aging and whitening of modified plastics, and the deformation and curling of the box. This large logistics box is mostly made of HDPE modified plastic material, with a maximum temperature resistance of 60 ℃. Warm water is the best choice
After immersion, the food clumps and dry dirt that originally formed in the gaps of the grid will expand and loosen, laying the foundation for the third step of brushing and removing, and avoiding scratching the plastic surface of the box with a hard brush (plastic scratches are more likely to hide dirt and turn black later).
Step 3: Mix the cleaning solution according to the material, soak and scrub it in a targeted manner (the most critical cleaning step in the 7 steps is to mix the solution according to the stain without wasting it)
According to the three types of boxes sorted in the first step, corresponding cleaning solutions are prepared separately, and universal cleaning agents are rejected for one size fits all cleaning, which not only saves consumables but also protects the plastic boxes. The focus is on fine brushing of grid gaps and blind spots on the base:
Classification and liquid preparation plan:
water+edible baking soda (250g baking soda per 10L of water)+a small amount of dishwashing detergent. Baking soda is mild and weakly alkaline, decomposing fruit acid stains, milk stains, and rotten vegetable and fruit mucus, non corrosive and non damaging to plastics, and detergent strengthens oil emulsification; Single box soaking time: 30 minutes for small household use soaking, 45 minutes for large full box soaking. During soaking, let the cleaning solution penetrate the bottom half of the box base, completely immerse the grid surface in the liquid surface, and let the solution seep into the internal gaps through the grid.
Clean water+neutral industrial degreaser (strong alkali caustic soda is strictly prohibited, as strong alkali corrodes plastics and causes the box to become brittle and crack), with a ratio of 1:80 to water according to the cleaning agent instructions. For areas with heavy oil adhesion, apply the original solution to the spot and let it stand for 10 minutes before soaking the whole. It is forbidden to mix 84 disinfectant and degreaser, as the mixture of the two liquids produces toxic and irritating gases.
Simply soak in water and a small amount of neutral laundry detergent for 15 minutes to soften the floating dust.
After soaking, use a long handled hard bristled floor brush to treat a large area of the outer wall of the box. The narrow headed gap brush is specially inserted into the vertical grid gaps to push and pull back and forth for brushing. The grid is the iconic structure of this box, and it is difficult to wipe the inside of each vertical grid by hand. The narrow brush moves vertically along the grid to clean the residual stains in the gaps one by one; The groove on the inner side of the support foot of the tray at the bottom of the box is cleaned by inserting a small toothbrush with an elbow. The rivet holes at the corners of the box and the fixing screw holes on the sides are blind spots for dirt accumulation, which should be cleaned one by one.
Important reminder: Do not directly wipe the smooth outer wall of the box with a hard steel wire ball. The steel wire ball will leave fine scratches on the plastic surface, which will then absorb dirt and turn black, and cannot be washed white for a long time. Only severe carbonization oil stains can be locally and temporarily wiped with steel wire dots.
Step 4: Rinse the residual liquid with clean water multiple times to prevent residual cleaning agents from corroding the box
The residual cleaning solution adheres to the gaps of the plastic mesh for a long time, which will accelerate the aging and yellowing of the plastic, and make the box brittle and crack. The core of this step is to rinse it layer by layer with clean water twice:
use flowing clean water to flush off the peeling stains and most of the foam on the surface of the box from top to bottom, turn the box over, let the sewage trapped in the grid drain naturally along the hollow grid, and place the foot of the base downward to flush out the sewage and residue trapped in the groove; During batch cleaning, the entire box can be briefly immersed in a clean water tank for quick rinsing;
Industrial large-scale cleaning can be equipped with a clear water rinse tank, and the box body can be soaked in the tank for a second time to remove residual liquid;
if the box is loaded with raw meat and seafood, the foam is easy to get stuck in the depth of the small grille. After washing, it can be briefly soaked in clean water for 5 minutes and then rinsed again. If the salty residue of seafood is not cleaned, the box will appear white salt stains after long-term storage.
Many people only rinse with water once when cleaning, and the residual detergent and dirt mix together. In a short period of time, the box will become moldy and blackened again. Multiple times of flowing water rinsing is the key to extending the service life of the box
Step 5: Targeted mold removal and disinfection treatment (essential for fresh containers, core steps for mold prevention in empty container storage)
Logistics boxes that store and load damp fresh produce for a long time are prone to the growth of black mold and Aspergillus flavus on the inner walls of the grid and grooves on the base. After washing off water stains, disinfection and mold removal should be carried out as needed. There are two disinfection schemes for food loading boxes and industrial material boxes:
Prepare food grade chlorine acid disinfectant (concentration 500mg/L), spray it evenly on the inside and outside of the box and the gaps in the grid in a spray bottle, seal and let it sit for 15 minutes for natural air drying. Hypochloric acid is residue free, non corrosive, and does not require secondary flushing. It is suitable for turnover boxes that come into contact with food; It is strictly prohibited to soak food containers in high concentration 84 disinfectant for a long time, as high concentration chlorine residues may adsorb onto the grid, posing a safety hazard for subsequent food loading; For areas where black mold has already grown, first apply baking soda paste (baking soda mixed with a small amount of water to form a paste) to the mold spot and let it stand for 20 minutes. After wiping off the mold spot with a soft brush, disinfect it;
Diluted 84 disinfectant (1:100 diluted with water) can be used to wipe away mold stains for a short period of time. After wiping, the container must be rinsed with clean water again to avoid residual disinfectant corroding plastics;
The disinfection process should be carried out in a semi dry state of the box as much as possible. Dilution of the disinfectant in a humid environment may not achieve the antibacterial effect.
Step 6: Control dryness and drain water+remove accumulated water with attention to detail to prevent secondary mold growth due to stuffiness
The structure of hollow grid and base groove in logistics boxes is prone to water accumulation, and damp and sealed stacking is the culprit of mold growth. Drying method:
The boxes are stacked diagonally on the sides, and should not be stacked horizontally. The grooves on the flat base cannot allow water to flow out. They should be placed in a single row to leave a ventilation gap. With the help of natural wind and exhaust fans in the factory area, they can be dried quickly. In summer, the temperature is 4-6 hours high, and in winter, the cold environment can be extended to 12-24 hours;
Small accumulated water in the deep crevices of the grid can be blown away with a hair dryer's cold air mode. Do not use high-temperature hot air to directly blow the plastic box, as local high temperatures can cause deformation of the grille.
Step 7: Check the orderly storage and maintain the cleanliness of the box for a long time (final maintenance to reduce the frequency of subsequent cleaning)
After the box is completely dry, it enters the final acceptance and storage stage, and operates from three dimensions: quality inspection, classification, and storage, reducing the probability of subsequent heavy cleaning:
visually inspect the grid seams, base grooves, and corners of the box one by one. If there are no visible stains, water stains, or mold spots, and the inner wall feels dry and sticky by hand, it is considered qualified. If the box does not meet the requirements, return to step 3 for local cleaning; Separate collection of cracked box grilles and damaged buckles found, as the gaps between damaged boxes are more prone to getting stuck and dirty. It is recommended to repair or scrap them;
Reorganize and stack according to the original stain category and usage scenario, store clean food special boxes and industrial material boxes in separate areas, and prohibit mixing and stacking to cause secondary pollution; This box supports stacking up and down, ensuring that the upper box base is completely dry before stacking to prevent the top surface of the lower box from being stained by residual water on the base;
After daily use, develop a simple dry cleaning habit, empty the residue and dry brush the grid dust in a timely manner after each use, rinse once a week with simple water, and thoroughly clean once a month. Shorten the frequency of fresh food use to deep cleaning every two weeks. Regular maintenance can avoid deep consolidation of stains and significantly reduce the labor and consumables costs of a single deep cleaning; The storage environment should prioritize a dry and cool warehouse, away from outdoor rain and damp basements. The box is prone to moisture and mold growth in damp environments.
Supplementary extension (with explanation of daily misconceptions)
Many users make three common mistakes when cleaning large logistics boxes:
- ① directly soaking the entire box in a sealed water bucket, making it impossible to replace the sewage inside the grid, and the more stains soak, the more they seep into the plastic pores;
- ② Strong acid and alkali cleaning agents can remove heavy oil stains quickly in the short term, but can make the box brittle, crack, and scrapped in the long term, greatly reducing the service life of the box;
- ③ Stacking and storing before it dries completely, the box will be covered with accumulated water for 3-5 days, and a large area of black mold will grow on the box.
The difficulty of removing mold will double in the future. This guide consists of 7 steps designed around the structure of this box with hollow mesh and integrated tray base. The entire process, from pre intervention to post storage maintenance, is closed-loop, which can meet the standardized cleaning of large quantities of storage boxes in supermarkets and factories. All operations do not require expensive professional equipment, and household cleaning products can complete the entire process.
