Often, consumers are faced with the question of which sofa is better - spring or with polyurethane foam? A wide range of upholstered furniture designs are offered on the modern market, which are distinguished by upholstery, a transformation mechanism, additional equipment and dimensions. One of the main indicators of product quality is internal filler. Consider the most popular of them.
Spring models
These modifications are divided into several subtypes. The common similarity is that the block is an effective structure of interconnected spring elements arranged vertically. To understand which sofa is better - spring or with polyurethane foam, we consider the characteristics of all versions in order. Let's start with the Bonnel modification.
This system is a robust design with steel springs of a biaxial configuration with four or five turns. Between themselves, the elements are connected by means of brackets or a spiral wire. The required rigidity is achieved due to the strong fastening of a single unit.
Benefits:
- practicality and weight keeping over 100 kilograms due to high resistance;
- optimal combination of price / quality parameters;
- filler coils do not touch, creak or deform, ensuring product reliability;
- long working resource with preservation of all characteristics.
The disadvantages of users include susceptibility to deformation, especially with point loads, weak orthopedic effect, difficulties with repair and moral old age, compared with modern counterparts.
Pocket Spring System
Continuing to study which sofa is better - spring or polyurethane foam, consider the design of Pocket Spring. It consists of independent cylindrical springs. Elements are made of special red-hot wire, disguised in textile covers sewn together.
Among the advantages, the following points are distinguished:
- elasticity provided by flexible elements, which makes it possible to provide maximum orthopedic effect;
- ease of use, lack of swaying, which guarantees a good rest and a healthy sleep;
- sanitary and hygienic indicators, moisture and air circulation;
- long service life.
The cons include the high cost of the product, due to the complex assembly technology, as well as the sensitivity of the system to directed mechanical stress.
Which sofa is better - spring or with polyurethane foam?
Owner reviews indicate that spring models are chosen by active, practical consumers who appreciate the versatility, functionality and reliability of upholstered furniture. When choosing experts advise to pay attention to the relevant certificates, guaranteeing high quality standards and hygiene standards. The possibility of subsidence and deformation of the sofa, including the duration of the working resource, depends on the degree of the index of the spring filler.
Modifications with polyurethane foam
Polyurethane foam (PUF) is a porous composition obtained from synthetic polymeric substances through a chemical reaction. The most famous analog of this material is foam rubber. In the modern market there are several types of PPU that differ in parameters. The main indicators of the quality of the specified substance are considered density and elasticity.
When choosing a spring sofa or polyurethane foam in the second case, you should focus on a density parameter of 30-40 kilograms per cubic meter. Material with a lower rate wears out faster. The most popular PPU brands:
- type CT-2236 is designed for moderate surface loads (not more than 60 kilograms), has a limited service life;
- mark ST-2536 creates a relatively rigid platform, withstands loads of up to 100 kg;
- variety ST-3540 is durable, convenient, withstands maximum loads.
Features of PPU
The density of polyurethane foam in a sofa with a spring unit is characterized by two categories:
- Cast format. It uses special forms filled with a specific liquid composition. It is possible to manufacture parts of any configuration, which makes it possible to form furniture of an original and unusual design.
- Block modification. The material under consideration is cut from large layers of blanks into strips of the required thickness and size. Then the layers are glued to each other until the required dimensions are obtained.
The advantages of PPU include:
- reasonable cost affordable for wide consumer groups;
- excellent technical and operational parameters with a high indicator of elasticity;
- long service life;
- practicality, hypoallergenicity, resistance to moisture;
- universality of execution due to the possibility of forming various geometric shapes and sizes.
User feedback on PPU
Opinions about which sofa is better - spring or polyurethane foam are very mixed. Some users prefer options with metal coils, focusing on the reliability of these structures. Other buyers prefer PPU as an adequate modern analogue. In any case, when choosing such a product, it is necessary to focus on the quality of the main components and the availability of certification of the materials used.
The advantages of a sofa with PPU are indicated above. Among the shortcomings, the owners indicate the flammability of the material, which, when ignited, releases harmful substances into the air. In addition, consumers do not always get the quality that they expected. When choosing a sofa block spring or polyurethane foam, experts advise to pay attention to the expensive version of the PUF with intellectual memory. Such material has the ability to smoothly take the contours of the torso of the owner of the furniture, adapting as much as possible to the characteristics of the body. In addition to foam rubber, the composition includes latex, special chips, synthetic winterizer or holofiber.
Criterias of choice
When choosing upholstered furniture, regardless of its content, pay attention to the functional value of the product. Many users are wondering: which sofa is better (spring or polyurethane) for daily sleep? And one, and other modifications can be used for the specified purpose. According to customer reviews, the best option would be a berth, which combines both components. Such models are especially convenient for everyday use.
When buying a product, do not forget to try it tactfully: feel the upholstery, sit, jump slightly. In addition, ask sellers for relevant documentation and quality certificates, as well as a detailed description of the materials used. Each of these types has its advantages and disadvantages, while high-quality sofas with any filling can not be cheap.
In conclusion
To buy furniture with polyurethane foam, spring or combined filler in the modern market will not be a particular problem. You will find suitable options in specialized furniture stores or on the websites of manufacturers and official dealers. A wide range of sofas, distinguished by design, equipment and price, allows you to choose a modification for any room, taking into account financial capabilities.