How are latex mattresses made? | Turmerry

How are latex mattresses made?

Author : Commerzilla LLC on February 16, 2022

Do you have trouble sleeping at night? Many people do, and that's why natural latex mattresses are becoming so popular.

Latex mattresses are made of natural materials, and they're good for your health and the environment. Plus, they last for years without losing their shape or comfort.

A woman sitting comfortably on a latex mattress

While the benefits of using a latex mattress are well known, most of you out there are not aware of the lengthy process involved in their fabrication.

You might be surprised by the journey that a latex mattress takes before it reaches your home. From natural rubber tree plantations in tropical climates to factories, there are a lot of steps involved in making natural latex mattresses.

In this post, we'll give you a detailed look into how natural latex mattresses are made. We'll explain the process in detail and explore some of the key components that go into them.

You'll appreciate the craftsmanship that goes into making these mattresses - and you'll be excited to get one for yourself.

STEP 1 - Collecting the raw material

The main ingredient used in making 100% natural latex mattresses is obtained from the rubber tree sap. This tree is mainly cultivated in humid and moist areas like Southeast Asia and West Africa.

Latex is the name given to the milky white liquid produced by the rubber tree. The process of latex harvesting begins with carefully stripping the bark of the rubber tree, about 0.84cm deep. Doing this disrupts the plant ducts, which contain latex. Disrupting these ducts allows the latex to flow down the side of the rubber tree.

A woman tapping latex from a rubber tree

A cup or container is placed near the incision to collect the latex oozing from the tree. The flow stops after six hours, but the rubber tree can be tapped again the next day with a new cut.

When exposed to direct sunlight, liquid latex undergoes coagulation, making it harder prematurely, complicating the processing cycle. To prevent this, latex is usually harvested at night or early morning before the sun comes out.

How much latex does it take to make a mattress?

A large amount of latex is needed to make a single mattress. However, making a queen-size or king-size latex mattress will take a whole day's output of around 12 acres of rubber trees.

It is important to note that the tapping process does not involve harming the rubber tree or creating any kind of pollution. After the liquid latex is collected, the tree bark gets healed quickly.

And, did you know that these trees can yield latex for up to 2 decades?

Latex collected in coconut shell

In other words, when you are purchasing a natural latex mattress, you are actually helping the environment. This means you are encouraging the growth of the rubber trees and, in doing so, you're helping to reduce carbon dioxide from the air.

You're also creating employment opportunities for people who tap rubber trees.

STEP 2 - Liquid latex processing

Once the latex is harvested, it needs to be transported in airtight buckets to the processing facility within the shortest time possible. This is because whenever liquid latex gets exposed to open air or direct sunlight for extended periods, it undergoes rapid coagulation.

After it arrives in the processing factory, liquid latex is poured into a large cylindrical tank using a sieve to remove coagulated lumps and unwanted particles. This tank contains a shaft that spins rapidly to incorporate air particles into the latex and produce a thick foamy paste.

Wondering why air particles are combined with latex? We've got answers! This particular step ensures that the mattresses that are produced become spongy.

Skipping this process leads to the production of stiff, hard, densely-packed mattresses that would be pretty much uncomfortable to rest yourself after a hectic day.

This stage is followed by molding of the latex foam.

STEP 3 - Molding of the latex foam

The foamed latex is finally transformed into a solid mattress in this stage. There are two methods used to carry out this process: the Dunlop method and the Talalay method.

Dunlop latex

In the Dunlop method, the foamed latex is poured into a mold and baked in a vulcanization oven. After the vulcanization process is complete, the baked latex can be separated from the mold and washed thoroughly. After washing, the material is baked again to remove moisture.

Talalay latex

Many steps of the Talalay latex manufacturing process are quite similar to that of the Dunlop method. First, the foamed latex is placed into a mold. Unlike the Dunlop method, here, the mold is only partially filled, and the lid of the mold is vacuum-sealed. This causes the mold to expand.

Once fully expanded, it is frozen rapidly, causing the carbon dioxide gas to push through the latex. At this point, the frozen mold is baked to set.

Once the baking process is over, the foamed latex is removed from the mold, washed carefully, and dried.

The Dunlop manufacturing process does not involve so many steps. This means products made from Dunlop latex are comparatively less expensive than Talalay. Also, the Talalay latex mattress process is more involved and produces a less dense and softer foam.

Natural latex foam layers

STEP 4 -  Quality inspection of the latex foam layers

Each latex layer extracted from the mold has to undergo a careful inspection process to ensure its quality.

In the first stage of the inspection, trained inspectors or experts scrutinize each natural latex foam for any visible deformity.

If any mattresses are found defective, they are immediately taken out of the production line and discarded. Only the good ones get approval to enter the next inspection stage.

The second stage of the latex mattress quality inspection is carried out using computerized hardware and mechanized tools. This stage aims at the foam softness level, susceptibility to shrinkage and premature wear.

To ensure all latex foams have an acceptable uniform stiffness, the foams are placed under a compressing machine. This machine compresses different parts of each mattress and transfers the data to a computer. The gathered data is used to categorize each of the natural latex foams based on the level of stiffness.

A random foam is selected from each batch and placed under a heavy rotating barrel to test the durability. This barrel continuously rotates over the mattress and mimics a human body lying on the mattress. The number of completed rotations is then recorded.

The repeated turning and shifting of the position of a person when lying on a mattress is directly responsible for the wear of the latex foam. Thus the number of times the barrel spins before the latex foam undergoes deformation corresponds to its overall durability.

STEP 5 - Adding fine details to the latex foam

Even after the quality inspection process is over, the latex foams are still not ready for use. Now, they are just rectangular pieces of solid natural latex foam. Some of them may also have minor inconsistencies around the edges, which might probably need actual trimming.

At this stage, natural latex foams are placed on a calibrated table and meticulously trimmed to give it a sharp and defined outline.

STEP 6 - Upholstering the latex foam with cover

The next step in latex mattress production involves upholstering each layer of latex foam using a comfy fabric cover.

The cover is stitched separately with the help of a sewing machine.  The natural latex foam is now ready to be inserted inside the zipper cover. Once the latex foam layers are carefully inserted inside the cover, the mattress is ready to use.

While some manufacturers use zippered covers, others stitch the whole mattress up.

Labels that provide specifications, care instructions, and warranty details can now be placed on the finished mattress.

Finally, the finished natural latex mattresses are packed in clear plastic covers and transported by the manufacturers to the stores for sale.

An animation showing the production process of latex mattress

Are there two types of latex mattresses?

Yes! Latex Mattresses can be made using All Latex Foam Mattress and Latex Hybrid Mattress.

A latex hybrid mattress has a latex foam top and a pocketed coil support core. This mattress comes inside a zipper cover.

  • Base Layer: The base layer of hybrid latex mattress offers stability and padding to the mattress and is typically a 1-inch latex foam.
  • Support Layer:  The support layer of hybrid latex mattress offers support and firmness to the mattress. This layer consists of pocket-wrapped springs and coils between 6 and 8 inches thick.
  • Top Layer: The top layer of the hybrid latex mattress offers utmost comfort and consists of 2 to 3 inches latex foam.

There is no doubt that the latex mattress manufacturing process is long and intensive. However, the end result is usually a non-toxic mattress that is 100% healthy, safe, and worth the extra effort.

That’s it! We hope you found this article about how natural latex mattresses are made interesting and informative. If you still have any questions about the latex mattress manufacturing process, let us know in the comments below.



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