Good mattresses have long ceased to be rare. The market is replete with a wide range of both springless models (latex, coconut, linen, camel, etc.) and mattresses with spring blocks.
Springless mattresses most often serve some specific purposes. For example: models with coconut coir for newborns or latex for allergy sufferers. However, most of these products can hardly be called orthopedic, that is, they allow the spine to remain in a comfortable, even state during sleep. Therefore, the choice most often has to be made among the assortment of mattresses with spring blocks.
Bonnell spring block - what is it?
Bonnell is a dependent spring unit, widely used in the manufacture of mattresses. On the one hand, this is a conventional design that has existed for decades and is well known to customers; on the other, there is an unusual connection of spirals that eliminates the characteristic creaking. Simple production technology has made Bonnell one of the most popular spring blocks for mattresses.
The Bonnell spring block has nothing in common with conventional spring designs. Its production technology completely eliminates the rapid deterioration typical of older mattress models.
Customer Reviews
There was an old sofa in the rented apartment. After 8 hours in the office, my lower back made itself felt in the evening; by morning the discomfort did not always disappear. I moved into my own apartment and bought a normal bed with a Bonnell mattress. Now my lower back doesn't bother me.
Maxim F.
Before pregnancy I could sleep anywhere! A tourist mat with a sleeping bag on hikes, benches in the waiting rooms of train stations, on the bare floor. But when I became pregnant, I couldn’t even sleep on the sofa - my back hurt so much. I had to buy a bed with a mattress. To save money, we took the bonnel. We made no mistake.
Julia K.
Several years ago, when choosing a mattress, we tossed between dependent and independent springs.
Chosen by addicts because of the price. A month ago we bought a new mattress with independent springs. I only feel the difference when my husband tosses and turns before going to bed. Olesya I.
Production technology
Despite the similarities, the Bonnell block is very different from traditional designs, well known for their terrible squeaking and the unique ability of the springs to sag or, conversely, bulge, creating uncomfortable sleeping conditions.
For Bonnell blocks, four- or five-turn bicone steel springs are used, which are connected to each other with wire. The latter is secured through special locking devices located at the ends of the spirals. The simple technology does not allow the springs to bulge or sag. At the same time, they do not creak when squeezed.
Comparison
| Parameters/Design | Dependent block | Independent |
| Price | Low | The higher the spring density, the higher the price. TFK is not much more expensive than Bonnel. |
| Sleeping weight | 90-120 kg. In some cases up to 150 kg. | From 110 kg (TFC) to 170 kg (S2000) |
| Rigidity | Low | The more springs, the higher the stiffness. |
| Life time | Depends on the fillers, on average about 5-7 years. | Up to 10 years with high-quality fillers and careful handling. |
| Wave and hammock effect | Present | Absent |
| Comfort | Base | Elevated |
| Noise | Available | Absent |
| Endurance | A basic level of | The higher the spring density, the higher it is. |
| Orthopedic qualities | Basic | High level. The higher the spring density, the more pronounced they are. |
| Transportation | Roll models available | Roll models available |
| Who is it suitable for? | For sleeping alone for people of standard build without problems with sleep and posture | For comfortable sleep alone and as a couple. There are a variety of block types available to suit different body types. Suitable as a preventive measure for signs of poor posture and back pain. |
| When is it recommended to buy? | When you need the cheapest option of at least 16 cm for organizing a temporary sleeping place. For example, for guests or during renovation. | Suitable for daily sleep |
Main characteristics of the Bonnel spring block
The Bonnel spring block is distinguished from conventional spring structures by the special, bicone shape of the spirals. They taper towards the center and widen towards the edges, that is, they have a narrowed waist. Thanks to its unusual shape, the spring system evenly distributes the load, which makes it partly similar to independent units, but an order of magnitude cheaper.
Another difference between Bonnell blocks and conventional models is the non-contact connection of the spirals, which completely eliminates the metallic rattle that accompanies sleeping on a regular mattress.
Properties of a spring mattress
Before you go on a budget purchase, you should weigh the advantages and disadvantages of this type of mattress. First, we list the main advantages.
Advantages
Reasonable price . Due to the low cost of production, Bonnell mattresses are the most affordable for consumers. The low cost made these products widespread. They can often be purchased in furniture stores even in small towns.
Durability . The mattress can be used for up to 15 years (if you do not exceed the maximum permissible load on the product, do not stand or jump on it).
Excellent ventilation . Thanks to the almost hollow base, the mattress is perfectly ventilated, does not accumulate moisture and dries quickly.
Models on a frame have a built-in base, and therefore can be installed on any base (homemade, not entirely level, even on the floor).
Flaws
At the same time, mattresses of this type have a number of disadvantages. Some of them are quite significant and may influence the buyer's final decision.
Failure of springs . The design technology is such that all the springs in the block are in a compressed position. If the fastening, which is also called a “lock,” breaks, the spring “shoots”—it is released and becomes noticeable. If the solution to the problem is delayed, the spring breaks through the insulating layer and upholstery of the mattress. Broken springs and cracked metal frames are also common problems with Bonnell mattresses.
Lack of orthopedic support . Due to the fact that all the springs are interconnected, the impact on any area of the mattress sets the entire product in motion. The spring block is not able to adapt to the anatomical features of a person. The only thing he is capable of is turning into a “hammock” under the sleeping body. Not recommended for regular use, especially for people with spinal problems. An additional problem with double mattresses is that any body movement of one sleeper is transmitted by a “wave” effect to the other. This factor should be taken into account especially for those who have sleep problems.
Sound effects . The block, under the influence of it, produces a characteristic crunch created by the “working” metal elements. Regular use for 3-4 years leads to increased rustling (due to loosening of the springs). Over time, the set of sounds produced can expand - a creaking is added to the crunch, rustling or rustling.
Inability to withstand heavy loads . For people who weigh heavily (more than 95 kg), a Bonnell-type mattress will be especially uncomfortable (the hammock effect is especially pronounced). The wear of springs in a mattress that regularly works “at the limit” of its capabilities occurs faster. Lumps, dips appear, and spring elements burst.
Advice! If the budget is very limited, a temporary solution may be to purchase a Bonnell mattress reinforced with PPU blocks (between the rows of bonded springs).
Inability to distribute loads evenly . If one partner weighs significantly more than the other, this may create a bias towards the heavier one. Then the lighter one will not be able to stay on its half and will constantly roll onto the opposite half of the sleeping surface.
Tendency to deformation . Over time, the mattress block is pressed in one or more places (due to weakening of the springs due to unevenly applied load). To minimize deformation, the product should be turned over at least once every six months.
Repairing a block of dependent springs is a complex issue. Finding a master who would agree to do this is not easy. Life hacks for repairing broken Bonnell block springs presented on the Internet are, to say the least, questionable. None of the craftsmen (even the old-school ones) recommend “repairing” broken springs, but replacing them with new ones. But finding a new spring of this type on sale is almost impossible. This is explained by the fact that the block of dependent springs is manufactured on special equipment in an automatic way and is not intended for repair (disposable).
Advantages and disadvantages of mattresses with Bonnell block
Mattresses based on Bonnell spring blocks, like any sleep product, have their advantages and disadvantages. It remains to find out what is more important and make the right choice.
pros
- ability to ventilate - the structure, empty inside, promotes excellent air exchange, which is good for health (absence of harmful microorganisms, good thermoregulation);
- reliability - the use of thick steel wire allows you to create elastic springs that do not collapse during operation, which is also useful for the correct position of the spine during sleep;
- durability of mattresses on Bonnell blocks, since the springs are made of durable elastic steel;
- affordable price is the main advantage of Bonnel spring mattresses, which makes them attractive to buyers.
Minuses
- low orthopedic characteristics - despite the non-contact connection of the spirals, people with different weights will feel uncomfortable on such a surface (if the weight is high, it is better to refuse such a mattress);
- When connections and locks wear out, a creaking sound may appear or the springs may begin to bulge.
It should be noted that the last drawback occurs if the manufacturer skimped on high-quality wire for springs. Well-known companies that care about their reputation do not make such mistakes.
More details about the pros and cons in the video:
Summing up
So, Bonnell mattresses - what are they? An invention for the ages or a relic of the past? Today, Bonnell-type mattresses, as before, are in demand and purchased. Such popularity is a consequence of the low price combined with sufficient durability.
Quite often, mattresses with a dependent block can be found in inexpensive hotels, hostels, and recreation centers. This product can be an ideal solution for a country house or cottage.
Nevertheless, the low orthopedic characteristics of the Bonnell type block are a good reason to refuse to purchase this model for regular use, especially for people with diseases of the musculoskeletal system and those who are heavy.
A more suitable option (moderately expensive, but more “orthopedic”) is a model with an independent spring block.
Care instructions
Budget mattresses with Bonnell spring blocks are in high demand among buyers, despite a number of their shortcomings. For example, the hammock effect they create. They are most often used as a guest or country house option.
If you decide to use the mattress as the main sleeping place, it is recommended to follow the recommendations for its use in order to extend its service life. The main condition is to turn the mattress over regularly, once every six months, so that the springs are compressed evenly and no dips or protruding springs appear.
If all care recommendations are followed, Bonnell dependent springs last on average at least 15 years.
Features of a block with independent springs
The springs are placed in insulated fabric covers that are glued together. When one spring is compressed, the others remain motionless. Their diameter is small, so the number of pieces per square meter reaches 1000 units. Excessive density leads to bending of the springs on the sides and worsens the anatomical properties of the product. The spirals touch and become deformed. Therefore, the best option is up to 350 pieces per square meter.
The model supports the spine, takes the shape of the human body, and relaxes the spinal muscles.
Polyurethane foam
Which mattress to choose for a newborn's crib
Polyurethane foam is a synthetic, highly porous foam material that is obtained by mixing several synthetic polymers.
more durable passportReceipt technology
There are two types of PPU:
- Cast polyurethane foam, which initially has a liquid state. It is poured into special molds that follow the contours and dimensions of the future sofa part. Under the influence of high pressure and significant temperature, it hardens. The resulting element is ready for use and has high dimensional accuracy. In this way, both the seat and the back or side cushions of the sofa can be made. The disadvantage of the cast type is the crust that forms on the surface as a result of sintering. Air circulation may be difficult in this case, which can lead to the formation of a “greenhouse effect.”
- Block polyurethane foam is often called a “sandwich”. This is due to the method of its production. The material comes in the form of large sheets of varying thickness and density. From these sheets, elements of the required sizes are cut and glued together. In this way, different levels of rigidity and height can be achieved. It is precisely because of the presence of several layers that the finished product resembles a sandwich.
For the manufacture of various elements of the sofa, sheets of different degrees of rigidity are used. Products made from polyurethane foam do not tolerate direct sunlight. Under their influence, they can crumble, so mattresses made of this material are additionally protected with covers made of light-proof fabric. An interesting feature of some PU foam compositions is that they have a shape memory effect. It is usually used to make pillows that remember the contours of the human body and adapt to them as much as possible. But as soon as you get up, the pillow will instantly return to its original state.
A product filled with high-quality polyurethane foam will be more affordable in cost than a “Pocket spring” block, and its properties and level of comfort will be approximately the same. This mattress can also be used for sleeping. "Bonnel" will be cheaper than both of these options and significantly worse in technical characteristics.
The advantages of PPU include:
- Long service life;
- Absolute safety and environmental friendliness of the material;
- Good balance of softness/hardness;
- Air and moisture permeability;
- The material does not provoke allergic reactions;
- Does not accumulate dust;
- Rapid restoration of shape after deformation due to high elasticity;
- Ability to withstand significant loads for long periods of time.
This material has significantly fewer disadvantages:
pros
What are the advantages of mattresses with Bonnell block:
- Reasonable price - production is cheap, so you can buy the accessory itself without damaging your own budget. This is another factor contributing to the proliferation of these products.
- Term of use.
- Reliability. The block is made of thick wire, so it can withstand significant loads. This property lasts for a long time. Bonnell mattresses are recommended for use by people weighing more than 100 kilograms.
- Good air conductivity. Ventilation is provided by the hollow base of the mattress. For the same reason, moisture quickly evaporates from it.
Tips for choosing a mattress
Pay attention to these factors:
- The main difference between spring types is that instead of having a round top, the spring usually has a hexagonal shape, which allows the coils to pack closer together.
- Manufacturers claim that this also allows the individual coils to fit more easily into the housing, but the fact that each coil is tied together makes the claim questionable.
- The individual coils in the LFK unit do not have knots at the top of each spring like Bonnell coils, which also affects performance and comfort.
LFK coil units typically contain many more springs than traditional Bonnells, making them stronger.
However, this statement remains questionable because the frame itself can also wear out.
Peculiarities
Conventional spring blocks invariably sag over time. The springs lose their strength, the mattress cover breaks through. The Bonnell device is more stable, which means that the buyer will be able to use the purchased product for a very long time.
The design of the devices allows the internal elements to be connected as tightly as possible. Due to this, the product becomes stronger.
Bicone springs with special type of coils make it possible to distribute the load so as not to harm the sleeping person, maintain correct posture, and also preserve the original properties of the accessory.
How firmly the connections are formed prevents the accessory from swinging.
In today's production, the Bonnell block in mattresses is supplemented with high quality soft filler:
- Wool.
- Cotton wool.
- Felt.
- Spunbond.
- Sintepon.
- Coir.
