What plastic are modern refrigerators made of

The interior space of a modern refrigerator is a complex engineering structure, where each element performs its own function. When choosing household appliances, consumers often pay attention to the compressor, defrosting system and external design, forgetting about the interior finishing materials. It is the quality of the polymers that determines how long the shelves will withstand the weight of the products, whether cracks will appear on the drawers and how easy it will be to care for the surfaces.

Manufacturers use various types of plastics, since there is no universal material that is ideal for all components. Polymer compositions they are selected individually for shelves, internal walls, door seals and handles. Understanding what your unit is made of will help not only to properly care for it, but also to avoid mistakes during operation that can lead to breakdowns.

In this article we will analyze in detail the chemical composition of the main elements of the refrigeration chamber, explain the difference between cheap and expensive plastics, and also tell you how to determine the quality of the material visually. You will find out why some drawers become cloudy over time, while others remain transparent for decades.

Main types of plastic for internal walls

The internal lining of the refrigerator is the first barrier that protects the thermal insulation layer and creates a sealed contour. For the production of monolithic internal walls, ABS plastic (acrylonitrile butadiene styrene) is most often used. This is an impact-resistant technical thermoplastic resin that has excellent decorative properties and high resistance to alkalis and acids.

The main advantage of ABS is its ability to maintain elasticity at low temperatures, which is critical for refrigeration equipment. However, this material has its own characteristics. It is susceptible to direct ultraviolet rays and some solvents. That is why, when cleaning the internal walls, you cannot use aggressive household chemicals containing acetone or chlorine.

In more budget models or in freezers from some manufacturers you can find polystyrene. This material is tougher and cheaper to produce, but it is more fragile. With a strong mechanical shock, for example, if you drop a heavy glass jar, the wall made of polystyrene may crack, while ABS is more likely to simply dent.

⚠️ Attention: Never try to seal a crack in the inner wall of the refrigerator with ordinary glue or epoxy resin. Most adhesive compositions contain solvents that can react with the refrigerant or foam located behind the plastic, which will lead to a complete loss of tightness and failure of the equipment.

The quality of the plastic directly affects the hygiene of the device. The smooth surface of ABS plastic absorbs odors and is easy to clean, which prevents the growth of bacteria. Manufacturers often add to the composition antibacterial additives based on silver ions to increase the safety of food storage.

Materials for shelves and drawers for vegetables

Shelves and drawers experience the greatest mechanical load during operation. For their manufacture, polystyrene high impact resistance or polypropyleneis used. These materials allow you to create transparent or translucent structures that do not turn yellow over time and can withstand significant weight.

Polypropylene is valued for its chemical inertness and heat resistance. It does not react with food acids contained in vegetables and fruits and does not emit harmful substances. Unlike ABS, polypropylene is less sensitive to grease, making it an ideal material for drawers where open-packaged foods can be stored.

• 🧊 Transparency: High-quality polystyrene allows for crystal clear shelves that improve visibility of contents.
• 💪 Strength: Reinforced plastics withstand load up to 25-30 kg per shelf without deflection.
• 🧼 Hygiene: The smooth surface has no pores in which dirt could accumulate.
• 🌡️ Thermal resistance: Materials retain their properties in the temperature range from -40 to +80 degrees Celsius.

It is worth noting that in expensive models of refrigerators Liebherr or Bosch tempered glass is often used in combination with plastic edging. This improves aesthetics and durability, but increases the overall weight of the structure. Plastic elements in such systems serve as a buffer, preventing direct contact of glass with metal guides.

When purchasing, you should pay attention to the plastic markings, which are usually stamped on the back of the box. The presence of the "glass and fork" symbol confirms that the material is certified for contact with food. The absence of such markings may indicate the use of technical plastic not intended for the food industry.

Handles, seals and fittings

Refrigerator fittings are the elements that most often come into contact with the user’s hands and are subject to wear. Door handles are traditionally made of durable ABS plastic or polycarbonate. These materials allow you to give products any shape, make them pleasant to the touch and resistant to grease from human hands.

Door seals deserve special attention. Although technically rubber, modern seals are often made from modified thermoplastic elastomer (TPE) or polyvinyl chloride (PVC) with added plasticizers. These materials provide the necessary softness, elasticity and magnetic properties (thanks to the embedded magnetic core).

The quality of the seal directly affects energy consumption. Cheap plastic or low-quality rubber quickly lose their elasticity, “harden” in the cold and no longer fit tightly to the body. This leads to the formation of ice and increased load on the compressor.

Differences between budget and premium plastic

Why do some refrigerators last for decades, maintaining their original appearance, while others turn yellow and crack after a couple of years? The answer lies in the quality of raw materials and additives. The premium segment uses highly purified primary raw materials, which guarantees the absence of impurities and the stability of the polymer structure.

Budget models are often made using recycled recycled plastic or raw materials with a low content of stabilizing additives. This material is more fragile, has an unpleasant chemical odor when first turned on and is prone to rapid aging under the influence of temperature changes.

The key difference is the presence UV filters and antioxidants in the composition. Even if the refrigerator is located in the back of the kitchen and is not illuminated by the sun, the light from the lamp inside the chamber and the background lighting of the room can cause the polymer to degrade over time without proper protection. Expensive models Samsung or LG use nano-coatings that not only protect the plastic, but also make cleaning easier.

⚠️ Attention: If, when purchasing a new refrigerator, you feel a sharp, pungent odor of plastic that does not disappear after airing for 2-3 days, this may indicate the use of low-quality raw materials. In such cases, it is recommended to increase the ventilation of the room.

It is also worth considering the thickness of the walls of the plastic elements. A visually thin vegetable drawer will last less, even if the material is of high quality. Manufacturers save on the weight of plastic by making the walls thinner, which reduces the overall strength of the structure when fully loaded with products.

The influence of plastic on the safety of products

Food safety is priority number one. All plastics used in refrigerators must meet strict sanitary standards. The main requirement is migration resistance. This is the ability of a material not to transfer its chemical components to stored products.

Polypropylene and polystyrene used in the food industry are inert. They do not react with acids (lemon juice, vinegar), alkalis and fats. However, if operating conditions are violated, for example, when storing very hot products in closed plastic containers inside the refrigerator, the risk of migration of substances may increase, although the plastic of the refrigerator itself has nothing to do with it.

The myth about “food” plastic

There is a widespread belief that any transparent plastic is safe. This is wrong. Technical polystyrene may contain residual styrene, which is toxic. Therefore, it is important that the internal elements have appropriate markings and quality certificates.

Particular attention should be paid to antibacterial properties. Many modern models are equipped with ionization systems or coatings based on silver ions, which are introduced into the plastic structure at the production stage. This prevents the growth of mold and bacteria in hard-to-reach corners of drawers and at the joints of shelves.

It is important to understand that the porous structures that can form on old, cracked plastic become an ideal habitat for microbes. If you notice that the surface of the drawer has become rough or microcracks have appeared that cannot be washed, it is better to replace such an element.

Rules for the care and cleaning of plastic surfaces

Proper care of the internal surfaces of the refrigerator extends its service life. Plastic, despite its strength, requires delicate handling. The use of abrasive sponges (metallic or hard synthetic) will inevitably lead to the appearance of micro-scratches.

Dirt and grease will become clogged into these scratches, which over time will turn into a coating that is difficult to remove. In addition, the damaged surface loses its aesthetic appeal and becomes dull. For cleaning, it is recommended to use soft flannel rags or sponges with a gentle side.

• 🧽 Use only mild detergents (dishing gel, special detergent for refrigerators).
• 💧 Avoid getting large amounts of water into the gaps between the plastic panels.
• 🚫 Do not use acetone, gasoline, chlorine bleaches and aggressive solvents.
• 🌡️ Do not wash plastic parts with hot water (above 40 degrees) to avoid deformation.

To remove stubborn dirt or odors, you can use a solution of baking soda or vinegar. These natural products effectively break down fat and neutralize odors without damaging the structure polymer. After wet cleaning, all surfaces must be wiped dry with a clean cloth.

Frequent problems and their solutions

One of the common problems is clouding of the transparent plastic. This often occurs due to contact with grease or the use of unsuitable detergents. You can restore transparency by washing the drawers with a solution of warm water and a small amount of ammonia, and then rinsing thoroughly.

Cracks on shelves are another common complaint. If the crack is through, it is better to replace the shelf, as it may burst under the weight of the food. You can try to carefully melt small surface cracks with a soldering iron with a thin tip (skill required!), but this is a temporary solution. In the case of ABS plastic, sometimes careful use of special adhesives for plastics helps, but only on the external side, not in contact with food.

⚠️ Attention: Refrigerator designs and materials used may vary depending on the model and year of manufacture. Specifications and types of plastic are subject to change by the manufacturer without prior notice. For accurate information on your model, please refer to the official instructions or the manufacturer's website.

If the plastic element is deformed (for example, a vegetable drawer has lost its shape and does not move out), you can try to restore it. To do this, the part must be removed, heated in warm water (not boiling water!) until softened, returned to the correct geometry and fixed until it cools completely. However, this method only works with thermoplastic materials and does not guarantee long-term results.

FAQ: Frequently asked questions

Can plastic parts be washed? refrigerator in the dishwasher?

In most cases, manufacturers do not recommend washing internal parts (shelves with plastic edging, drawers) in the dishwasher at high temperatures. Hot water (above 60-70°C) can cause thin plastic to deform or destroy adhesive joints. Only delicate washing at low temperatures is permissible, unless otherwise specified in the instructions for the refrigerator.

What is the danger of the smell of new plastic in the refrigerator?

The smell of new plastic is the result of the evaporation of volatile organic compounds remaining after production. Usually it is not hazardous to health and disappears in 2-5 days. To speed up the process, the refrigerator must be thoroughly rinsed with water and soda and left open for a day. If the smell is sharp, chemical and does not go away for a week, this is a sign of low-quality raw materials.

How to remove yellowness from white plastic?

Yellowness is the result of oxidation of plastic under the influence of light and time. It is difficult to completely remove it, but you can lighten the surface using hydrogen peroxide (apply gel, leave under a UV lamp or in the sun for several hours) or special cleaners for plastic. Mechanical friction will not help here, since the color of the material itself changes.

Is ABS plastic safe for food storage?

Yes, ABS plastic used in refrigerators is certified for contact with food. It does not contain bisphenol-A (BPA) in free form and is inert at low temperatures. However, it is not intended to be heated, so you should not put hot food in the refrigerator, especially in a closed container that creates a vacuum or pressure.

Why did the plastic box in the freezer crack?

Plastic becomes more brittle at extremely low temperatures. If the temperature in the freezer drops below -24...-26°C (super-freeze mode), ordinary polystyrene may not withstand mechanical stress (shock, fall). For such modes, special frost-resistant polymers are designed, which are used in more expensive models.