What is the refrigerator made of: materials of the body, doors and internal elements

When you are faced with choosing a new refrigerator or trying To understand the reasons for the corrosion of the old one, the question of the materials for its manufacture becomes key. Not only the appearance and durability of the equipment, but also its energy efficiency, noise level and even the safety of stored products depend on this. Manufacturers use a variety of solutions - from classic steel to innovative polymers with antibacterial properties, and each material has its own strengths and weaknesses.

In this article we will analyze in detail what modern refrigerators are made of: from the outer case to the internal shelves and sealing rubber bands. You will find out why stainless steel is considered a premium option, why cheap plastic is dangerous, and how innovative coatings affect hygiene. We will also compare materials according to key criteria - durability, care, price and environmental friendliness, to make it easier for you to make an informed choice.

Main materials of the refrigerator body: comparison of pros and cons

The refrigerator body is its “face” and at the same time a protective frame that must withstand mechanical loads, temperature changes and humidity. Today, manufacturers use three main materials: metal (steel or aluminum), plastic and their combinations. Each option has unique characteristics that affect the cost, weight and performance properties of the equipment.

Let's look at them in more detail:

• 🔹 Stainless steel —a premium material that is associated with reliability and style. It is resistant to corrosion, easy to clean and looks presentable, but requires regular maintenance (fingerprints and stains are more visible than on matte surfaces). Stainless steel refrigerators are usually 20–40% more expensive than their plastic counterparts.
• 🔹 Enameled steel is a more budget-friendly alternative to stainless steel. The metal is covered with a layer of enamel, which protects against rust and allows you to experiment with colors (white, black, red). However, over time, the enamel can chip off when impacted, exposing the metal.
• 🔹 Plastic is a light and cheap material that is often used in budget models (Indesit, Beko, ATLANT). Modern polymers are scratch-resistant and do not rust, but may yellow over time when exposed to UV rays. Plastic housings are less durable and dampen compressor vibrations less well.
• 🔹 Aluminum is rarely used as the main housing material, but is often used for decorative inserts or handles. It is lightweight, non-magnetic (unlike steel) and resistant to corrosion, but softer than steel and can be deformed under strong impacts.

Interestingly, some brands, for example Liebherr or Miele, combine materials: metal frame + plastic panels. This allows you to reduce the weight of the equipment without losing strength. But in premium models (Samsung Family Hub, LG InstaView) they are often used glass panels on the doors - they look futuristic, but require careful handling.

Internal materials: shelves, containers and seals

If the refrigerator body is responsible for the appearance and protection, then the internal elements directly affect hygienicthe ease of storage and even the taste of the food. Here, manufacturers use other materials that must be safe for food, resistant to low temperatures and easy to clean.

Let's consider the key components:

• 🧊 Shelves most often made from tempered glass or transparent plastic. Glass shelves can withstand weight up to 20–30 kg (depending on the model), do not absorb odors and are easy to clean. Plastic ones are lighter and cheaper, but over time they can become covered with microcracks where bacteria accumulate. In premium refrigerators (for example Bosch Serie 8), shelves are sometimes covered antibacterial layer based on silver ions.
• 🥬 Boxes for vegetables and fruits usually made from transparent or tinted plastic. It is important that it be food grade (labeled PP or PET) and does not contain bisphenol-A (BPA). In some models (LG Door-in-Door), the drawers have adjustable humidity thanks to special valves.
• 🔄 Sealing rubbers (aka magnetic gaskets) are made from food-grade silicone or thermoplastic elastomer (TPE). A high-quality seal should be elastic, not crumble in the cold and fit tightly to the body. Cheap rubbers lose their shape over time, which leads to icing and increased energy consumption.

Particular attention should be paid the back wall of the refrigerator compartment. In old models it was often metal, and in modern ones it was plastic. Plastic is more practical here: it does not rust and insulates the cold better. However, in some premium refrigerators ( drip defrosting system. Plastic is more practical here: it does not rust and insulates the cold better. However, in some premium refrigerators (Smeg) the back wall is made of stainless steel - this is a tribute to the retro style, but requires more careful maintenance.

Innovative materials: antibacterial coatings and eco-solutions

Modern refrigerators are not only about functionality, but also about concern for health and the environment. Manufacturers are actively introducing innovative materials that inhibit bacterial growth, reduce odors and even reduce energy consumption. Let's consider the most interesting developments:

• 🦠 Antibacterial coatings based on silver or copper ions. They are applied to shelves, drawers and seals and suppress up to 99.9% of bacteria (according to Panasonic and Hitachi). Such coatings are especially relevant for families with children or people with allergies. For example, models Panasonic NR-BN use technology Ag Clean.
• ♻️ Recycled plastics. Brands like Electrolux i Whirlpool are starting to use recycled plastic for cases and internal elements. This reduces the carbon footprint of equipment, but requires strict quality control - the recycled material should not release toxins.
• 🧪 Carbon plastic (carbon). This ultra-strong and lightweight material is currently used only in concept models (for example, Samsung Bespoke Carbon). It is resistant to scratches and corrosion, but significantly increases the cost of the refrigerator.
• 🌿 Natural antiseptics. Some manufacturers are experimenting with adding bamboo or tea tree extracts to plastic. These components naturally suppress odors and bacteria, but their effectiveness is lower than that of synthetic coatings.

Important: antibacterial coatings do not replace the need for regular cleaning of the refrigerator! They reduce the risk of bacterial growth, but do not remove dirt, grease and mold mechanically. In addition, some coatings (for example, with silver nanoparticles) may lose effectiveness over time and require updating.

Myths about antibacterial refrigerators

We debunk popular misconceptions:

1. “The antibacterial coating kills all germs” - in fact, it only slows down their reproduction, but does not replace cleaning.

2. “Such refrigerators do not smell” - coatings reduce odors, but do not eliminate them completely, especially if food is stored incorrectly.

3. “Silver ions are hazardous to health” - in concentrations used in household appliances, they are harmless (confirmed by the FDA and the EU).

How the material of a refrigerator affects its operation and energy consumption

The materials from which a refrigerator is made directly affect its thermal insulationnoise level and even energy consumption. For example, a metal casing is better at dissipating heat, but requires more insulation to keep the inside temperature low. Plastic models, on the contrary, conduct heat worse, but may have thin walls, which reduces the useful volume.

Let's consider the key aspects:

• 🔋 Energy efficiency. Refrigerators with a metal frame (especially thick ones) usually consume more energy, since the metal heats up faster and transfers heat into the room. Plastic models benefit in this regard, but only if the insulating layer (usually polyurethane foam) is thick enough. The best option is combined housings with vacuum insulation (for example, in LG InstaView ThinQ).
• 🔇 Noise level. Metal housings better dampen compressor vibrations, so refrigerators made of stainless steel or enameled steel are usually quieter than plastic ones. However, if the metal is thin, it can, on the contrary, enhance the sound (the “drum” effect). In premium models, sound-absorbing material is used to reduce noise. multilayer panels with sound-absorbing material.
• ❄️ Thermal insulationThe quality of insulation depends not so much on the housing material, but on the type. insulation. 90% of refrigerators use polyurethane foam, but the latest models (Samsung SpaceMax) use vacuum insulation, which is 30% thinner, but 2 times more effective.

Interesting fact: in refrigerators with French door (two-door models with a freezer at the bottom) they are often used double glass in the doors. This reduces heat loss. opening, but increases the weight of the door. Therefore, in such models, more powerful hinges and magnets are installed.

Which material is better to choose: tips on criteria

The choice of refrigerator material depends on your priorities: budget, design, durability or environmental friendliness. To make the task easier, we have compiled a checklist based on key criteria:

Select your budget (plastic is cheaper, stainless steel is 30–50% more expensive)

Decide on the design (matte stainless steel hides fingerprints, gloss requires care)

Check the scratch resistance (glass and metal are stronger than plastic)

Check the availability of antibacterial coatings (relevant for families with children)

Assess the noise level (metal cases are usually quieter)

Look at the weight (plastic is lighter, but less stable)

Make sure it is environmentally friendly (look for certificates RoHS or Energy Star)-->

If design and premiumis important to you, choose stainless steel models or glass panels (for example, Smeg FAB28 or Samsung Family HubFor budget option plastic). case with antibacterial coating inside (for example, ATLANT XM 4021-000). If your priority is environmentally friendly, look for refrigerators with recycled plastic and certificates Energy Star (for example, Electrolux EEA).

Pay attention to warranty: manufacturers often give a longer warranty on metal cases (up to 10 years on stainless steel). data-i="212">), while for plastic it is usually 1-2 years. Liebherr), while for plastic it usually takes 1–2 years.

fridge care depends on the type. material

Each material requires its own approach to care. Improper cleaning can lead to scratches, corrosion or loss of antibacterial properties. Here are the key recommendations:

• 🧼 Stainless steel: use a soft cloth and special products for stainless steel (for example, Weiman Stainless Steel Cleaner). chlorine-containing detergents - they can damage the protective layer. To remove fingerprints, a solution of vinegar (1:1 with water) is suitable.
• 🎨 Enamelled steel: wash with warm water and soap. Do not use hard brushes - they can scratch the enamel. If chipped, immediately treat the area with an anti-corrosion compound. (for example, Zincar).
• 🔳 Plastic: a soap solution or plastic cleaner is enough (Mr. Proper). Do not use acetone or solvents - they can corrode the surface. To remove yellowness, a paste of soda and water.
• 🪟 Glass. shelves and doors: wash with glass cleaner (Mr. Muscle) or ammonia solution (1 tablespoon per 1 liter of water) Do not use scrapers - they leave microcracks.

Pay special attention sealing rubberIt must be cleaned at least once a month with a solution of baking soda (2 tablespoons per 1 liter of water) and dried after washing. If the rubber begins to crumble, it can be treated silicone grease (for example, WD-40 Specialist), but if there is severe wear, it is better to replace it.

⚠️ Attention: Never wash the inside of the refrigerator with hot water - a sharp temperature change can damage plastic parts and seals. The optimal water temperature for cleaning is -. 30–40°C.

Frequent problems associated with materials and how to avoid them

Even the highest quality materials can cause problems over time: corrosion, cracks, loss of color or unpleasant odors. Let's consider the typical "diseases" of refrigerators depending on their design and how to fix them. prevention.

One of the most common problems is icing of the sealThis occurs due to loss of elasticity of the rubber or loose fit of the door. ice appears regularly, check:

1. The tightness of the seal (checked with a sheet of paper - it should press tightly against the door).
2. The cleanliness of the magnetic gasket (dirt and grease interfere with the seal).
3. Evenness of installation of the refrigerator (distortion of the door leads to cracks).

⚠️ Attention: If the seal has lost its shape and is not restored after treatment with silicone, it must be replaced. Ignoring the problem leads to increased energy consumption (up to +20%) and the risk of compressor failure.

FAQ: Frequently asked questions about refrigerator materials

Is it possible to paint the plastic body of a refrigerator if it has turned yellow?

Yes, but this is a temporary solution. For painting, use special paint for plastic (for example, Krylon Fusion or Rust-Oleum Plastic). Pre-clean the surface with sandpaper (400–600 grit) and degrease with acetone. However, the paint may peel off after 1-2 years, especially if the refrigerator is washed frequently.

Why is stainless steel magnetic, but some refrigerators are not?

It depends on the grade of steel. Most household refrigerators are made from Ferritic stainless steel (grades 430, 409), which is magnetic. In premium models it can be used Austenitic steel (brands 304, 316) - it is not magnetic, but more expensive. Magnetic properties do not affect quality, but can be important if you hang notes on the refrigerator.

Which case material holds the cold better - metal or plastic?

The case material itself is weak affects the preservation of cold - this is the task thermal insulation (polyurethane foam or vacuum panels). However, metal conducts heat away from the compressor more quickly, which may improve energy efficiency slightly. Plastic cases conduct heat worse, but with high-quality insulation the difference is minimal.

Is it possible to restore the antibacterial coating on the shelves?

No, it is impossible to restore the factory coating (for example, with silver ions) at home. If it is damaged, there are two options left: replace the shelves/drawers with new ones or use removable antibacterial stickers (for example Nano Silver Stickers). However, their effectiveness is lower than that of the factory coating.

What is the danger of cheap plastic in the refrigerator?

Cheap plastic may contain bisphenol-A (BPA) or other toxic additives that are released at low temperatures and end up in products. In addition, such plastic turns yellow faster, cracks and absorbs odors. When purchasing, check the safety certificates (RoHS, REACH) and give preference to brands with a good reputation (Liebherr, Bosch, Samsung).