The core application scenario of explosion-proof vacuum packaging machines is to package items that are flammable, explosive, volatile, or may generate combustible dust/gas during the packaging process. Its original design purpose is to eliminate ignition sources such as electric sparks and high temperatures that may occur during equipment operation, thereby preventing safety accidents. Combined with practical industrial applications, the items specifically suitable for packaging can be divided into the following major categories:
The chemical industry is a core application field for explosion-proof vacuum packaging machines. These machines mainly target solid, powdery, or granular chemical products with explosion risks, preventing them from oxidizing, decomposing due to contact with air, or exploding when volatile gases encounter ignition sources.
- Organic chemicals: Benzene derivatives, sodium methoxide, sodium ethoxide, sodium peroxide, etc. (volatile or prone to thermal decomposition to produce combustible gases);
- Solvents: Solid solvents (e.g., camphor balls, solid alcohol), solvent-based coatings/paints (for packaging their powdery raw materials or pre-treatment before finished product canning);
- Other chemical products: Resin powders (e.g., epoxy resin, phenolic resin), curing agents (e.g., amine-based curing agents, some of which are volatile and flammable), dye intermediates (some contain nitro or amino groups and are prone to explosion when encountering ignition sources).
In pharmaceutical production, some raw materials, intermediates, or semi-finished products are volatile, flammable, or explosive. They also need to be strictly isolated from air to ensure purity (preventing oxidation and deterioration), while avoiding safety accidents caused by equipment ignition sources.
- Flammable and explosive raw materials: Solid pharmaceuticals containing alcohol (e.g., alcohol swabs, solid disinfectants), anesthetic drug intermediates (some are volatile and have explosion risks), pharmaceutical intermediates containing nitro groups (e.g., nitrobenzene-based intermediates);
- Oxidation-prone pharmaceuticals: Antibiotic raw material powders (e.g., penicillins, cephalosporins, isolated from air to prevent degradation), vitamins (e.g., vitamin C, vitamin E, preventing oxidation and inactivation);
- Special finished pharmaceuticals: Some external ointments requiring vacuum storage, traditional Chinese medicine extracts containing volatile components (e.g., solid mixtures of menthol and borneol).
The military field has extremely high safety requirements. It is necessary to package various flammable and explosive pyrotechnic products and equipment parts to prevent explosions caused by air contact, static electricity, or ignition sources during storage and transportation.
- Pyrotechnic products: Ammunition components (e.g., bullet casings, fuze housings), semi-finished detonators, pyrotechnic powders (e.g., black powder, aluminum powder explosive for fireworks);
- Military materials: Flammable metal powders (e.g., magnesium powder, aluminum powder, which are prone to spontaneous combustion when in contact with air and require vacuum isolation), solid additives for military fuels (some have explosion risks).
In the food industry, explosion-proof vacuum packaging machines are mainly used for two types of foods: first, foods containing flammable components such as alcohol (to prevent volatile alcohol gas from encountering ignition sources); second, scenarios where dust/oil gas exists in the environment during large-scale production (e.g., fried foods, nuts—though the foods themselves are not easily flammable, oil gas in the production environment is prone to accumulation, requiring explosion-proof design).
- Alcohol-containing foods: Liquor-filled chocolates (with high alcohol content, which easily forms combustible gas after volatilization), solid alcohol blocks (for food heating, which are flammable themselves), fermented foods (e.g., sufu, fermented black beans—some produce a small amount of alcohol during fermentation, requiring explosion-proof packaging for large-scale production);
- High-oil/high-dust foods: Fried nuts (e.g., fried peanuts, fried cashews, with heavy oil gas in the production environment), powdery food additives (e.g., baking sugar powder, milk powder—accumulation of large amounts of dust poses explosion risks).
In the new energy field, raw materials for lithium batteries and energy storage batteries (e.g., electrode materials) are mostly powdery. Some of these materials are flammable and need to be isolated from air to prevent oxidation. At the same time, it is necessary to prevent battery raw materials from exploding due to equipment ignition sources.
- Lithium battery raw materials: Cathode material powders (e.g., ternary material LiNiCoMnO₂, lithium cobalt oxide), anode materials (e.g., graphite powder, which requires vacuum packaging to prevent oxidation in some processes);
- Energy storage materials: Solid battery electrolyte powders (some contain flammable components), electrode powders for supercapacitors (e.g., activated carbon powder—large-scale packaging may lead to dust explosion risks).
