When choosing new household appliances for the kitchen, consumers often focus on size, energy efficiency and functionality, forgetting about the fundamental characteristic - the materials used. The durability of the unit, the ease of its maintenance and the safety of stored products directly depend on the raw materials from which the body, interior space and shelves are made. The question of which material will make a refrigerator last longer does not have a clear answer, since manufacturers use complex composites and alloys for different components.
The modern market offers models that combine metal, glass, various types of plastic and specialized polymer coatings. Understanding the physical and chemical properties of these components will help you not only buy a reliable device, but also properly care for it in the future. In this article, we will analyze in detail what refrigerators are made of, we will weigh the pros and cons of popular solutions.
Materials for the exterior finishing of the case
The first thing the buyer pays attention to is the front panel and sides. Traditionally, for the production of the body, sheet steelis used, which is then covered with a protective and decorative layer. This can be powder coated enamel or a polymer film. Enameled surfaces are highly resistant to mechanical damage and chemical influences, however, fingerprints are clearly visible on dark shades.
In the premium segment it is increasingly found stainless steel with various surface textures, such as Brushed (satin) or Mirror (mirror). Such models look impressive, but require regular polishing with special products to maintain a neat appearance. An alternative to metal is tempered glass, which is often tinted black, white or gray. Glass panels do not scratch, are easy to clean, but are more fragile when subjected to pinpoint impacts.
⚠️ Attention: when purchasing a model with a stainless steel facade, check the type of coating. Some types of “stainless steel” have a protective film that must be removed before turning it on for the first time, otherwise the material may turn yellow from the heating of the compressor.
When choosing between metal and glass, it is worth considering the overall style of the kitchen. Metal cases are more repairable: small dents can be straightened out, and scratches on the enamel can be painted over. Glass, if damaged, requires replacing the entire panel, which can be expensive.
Internal space: plastic or metal?
If you look inside the chamber, you can see that the main material forming the internal volume is ABS plastic (acrylonitrile butadiene styrene). This is an impact-resistant, hygienic and lightweight material that holds heat well and is not susceptible to corrosion. In more expensive models, the internal walls can be made of aluminum with an antibacterial coating or even stainless steel, which significantly increases their wear resistance.
The plastic inside the chamber often has a textured surface. This is done not only for aesthetics, but also for functionality: the roughness hides small scratches that inevitably appear during use when moving pots. However, cheap types of plastic can absorb odors over time or change color under the influence of ultraviolet radiation if the refrigerator is located near a window.
- 🧊 ABS plastic - industry standard, lightweight and cheap to produce, but is afraid of sharp objects.
- 🛡️ Coated aluminum - found in professional series, easy to clean, but can be noisier in contact with utensils.
- ✨ Stainless steel inside —maximum hygiene and durability, typical for commercial and luxury equipment.
It is important to note that the quality of plastic directly affects the smell in the new refrigerator. A high-quality one ABS plastic should not have a strong chemical odor after unpacking. If the smell is persistent and unpleasant, this may indicate the use of recycled materials or a violation of production technology.
What are they made of? shelves and door baskets
Shelves in modern refrigerators are most often made from tempered glass. This is a durable material that can withstand significant loads (usually up to 25-30 kg per shelf), while it does not absorb odors and is easy to clean. The glass can be clear or tinted, and its edge is often framed with a metal or plastic profile for safety.
Door baskets and vegetable drawers are almost always made of clear plastic. Here, as a rule, polystyrene or polypropylene is used. These materials are flexible enough to withstand the stress of bottles, but can become brittle at low temperatures. That is why it is not recommended to slam the door sharply or put hot dishes in plastic drawers.
| Shelf/Drawer type | Material | Advantages | Disadvantages |
|---|---|---|---|
| Main shelves | Tempered glass | Durability, hygiene, style | Heavy weight, risk of breakage if dropped |
| Door baskets | Polystyrene | Flexibility, transparency, lightness | They become cloudy over time, brittle in the cold |
| Boxes for vegetables | Polypropylene | Impact resistance, moisture resistance | Can crack when overloaded |
| Drawer systems | Metal + Plastic | Smooth running, reliability | More difficult to clean, more parts |
When When choosing, pay attention to the profile of the shelves. If the glass is simply inserted into the grooves, it is easier to clean, but more difficult to fix. Shelves with metal edging look more solid, but dirt can accumulate at the junction of metal and glass.
☑️ Checking the quality of the shelves
Antibacterial and functional coatings
Modern technologies make it possible to apply special coatings to the internal surfaces that not only protect the material, but also prolong the freshness of products. Most often we are talking about silver ions, which are embedded in the structure of the plastic or applied in the form of a spray. Such surfaces prevent the growth of bacteria and the formation of mold, which is especially important for the fresh zone and vegetable drawers.
There are also coatings based on titanium oxide or copper, which work on the principle of photocatalysis, decomposing organic pollutants under the influence of light inside the chamber. Some manufacturers use nano-coatings that create a “lotus” effect, due to which liquid and dirt simply roll off the walls without being absorbed into the pores of the material.
⚠️ Attention: the presence of an antibacterial coating does not mean that the refrigerator does not need to be washed. It is recommended to sanitize the internal chambers at least once every 3-4 months, using mild detergents without abrasives.
It is important to distinguish between marketing names and real properties. For example, the term “Bio-Shield” or “Antibac” may simply mean an additive to plastic during production, which loses its effectiveness over time (5-7 years), while silver ions can act longer.
Myths about nano-coatings
There is an opinion that nano-coatings make the refrigerator completely self-cleaning. This is wrong. They only make cleaning easier by preventing the adhesion of grease and dirt, but mechanical removal of food debris is still necessary.
Insulation and insulating materials
Behind the outer wall of the refrigerator there is a layer of thermal insulation, which is the “heart” of the energy efficiency of the device. The vast majority of modern models use polyurethane foam (PPU). This material is foamed directly in the cavity between the internal and external contours of the body, creating a monolithic layer without seams or cold bridges.
The quality of the PPU determines how quietly the refrigerator will operate and how much electricity it will consume. Cheap models may have a less dense foam structure, which leads to faster defrosting during a power outage and increased noise levels from compressor vibration. In some old or budget models, mineral wool may still be found, but this is rather an exception to the rule.
- 🏗️ Solidity — PPU fills all voids, providing structural rigidity and excellent sound insulation.
- 🔥 Safety —modern types of polyurethane foam do not support combustion and are environmentally friendly after polymerization.
- ❄️ Efficiency - low thermal conductivity allows you to keep cold for a long time.
It is worth noting that the thickness of the insulating layer directly affects the useful volume of the refrigerator. With the same external dimensions, a model with higher quality and thinner, but effective insulation (for example, vacuum panels in the premium segment) will have a larger internal volume.
Environmental friendliness and recycling of materials
The question of what material a refrigerator is made of becomes especially relevant at the end of its life cycle. Modern manufacturers strive to use recyclable materials. Steel and aluminum are accepted for scrap without restrictions, glass is also recyclable. The situation is more complicated with plastic, the types of which must be sorted.
Particular attention is paid to refrigerants and blowing agents. If previously substances that destroy the ozone layer (R12 freons) were used, now other environmentally friendly gases are also standard. They are safe for nature, but require a professional approach when disposing of them, as they are flammable. isobutane (R600a) and other environmentally friendly gases. They are safe for nature, but require a professional approach when disposing of them, as they are flammable.
⚠️ Attention: never try to disassemble the refrigerator yourself in order to return the metal. There may be refrigerant vapors and compressor oil inside, which are hazardous to health and the environment. Hand over equipment only to specialized collection points.
By purchasing equipment from well-known brands, you indirectly support recycling programs and the use of “green” technologies. Many large concerns are already switching to packaging made from recycled cardboard and abandoning polystyrene foam in favor of paper inserts.
Comparison of popular solutions: what to choose?
To summarize, we can say that there is no ideal material, there is only the optimal price-quality ratio for your needs. If you are looking for equipment that will last forever and are willing to pay for premium quality, choose models with a stainless steel body and aluminum internal chambers. For a standard city apartment, classic enameled steel and tempered glass shelves are an excellent choice.
It is also important to consider that material is only part of the equation. Build quality, compressor reliability and proper operation play an equally important role. Before purchasing, be sure to ask the seller not only about the functionality, but also about the materials used to make the key components.
Does the color of the refrigerator affect the material?
The color itself does not change the material, but it does affect the coating technology. Black and white refrigerators are often made from painted steel, as they are less likely to show paint defects. Models “metal-like” or with a pattern may have a more complex coating structure or be made of glass.
Is it true that glass shelves are cooler than plastic ones?
Yes, glass has a higher thermal conductivity than plastic. Therefore, products are cooled more evenly on glass shelves. However, the shelf material itself does not generate cold; the evaporator does this.
Is it possible to wash a plastic refrigerator with abrasive agents?
It is strictly not recommended. Abrasive particles leave micro-scratches on the plastic, which then become filled with dirt and bacteria. The plastic becomes dull and loses its appearance. Use only soft sponges and special products.
Which case material hides scratches best?
Stainless steel surfaces with a texture (satin) and light-colored enameled surfaces with a textured pattern hide small scratches and abrasions best. Glossy black surfaces and glass, on the contrary, show any traces of touch.