What is the difference between foam, memory foam, and non-thermal memory foam? Mattresses are used which sponge?

Sponge city we all learn to know very familiar, we carry out daily work life in the dishwashing sponge wipe, sofa cushion, seat back, mattress pillow, toy stuffing, powder puff make-up egg many enterprises are through the sponge material. Seen SpongeBob you certainly students know that our sponge is a kind of porous elastic analysis material, simple but powerful sponge is actually can be developed into a variety of, such as teachers can often hear the memory foam, PU foam, rubber sponge and so on, but they as a mattress filler layer which sponge will be more appropriate? Today we will take you to completely solve the problem of recognizing themselves a mattress in the sponge.

First, sponge mattress raw materials

The chemical name of the sponge is polyurethane foam composite material, our country commonly used sponge by lignocellulose nanofibers or foamed plastic polymers can be made. Making a mattress sponge city mainly consists of raw materials are polyether and TDI/MDI (accounting for 25%-35%), plus a number of different foaming agents and catalysts in our country.

Foaming principle of sponge

Sponge has a porous honeycomb structure, with good flexibility, water absorption and other characteristics, widely used in sofas, mattresses, clothing, soft packaging and other industries. In order to increase the flexibility and elasticity of the sponge, often using foam treatment, sponge foam mainly has the following four processes.

1、pre-polymer foaming method

Polyether polyol and diisocyanate first made of pre-polymer, and then add water, catalyst, surfactant, other additives in the pre-polymer mixed with high-speed mixing for foaming, curing can be cured at a certain temperature.

2、Semi-pre-polymer foaming method

First of all, some polyether polyol (white) and diisocyanate (black) made of prepolymer, and then add another part of white and black, catalyst, water, surfactants and other additives, high-speed mixing foam. The foaming method has some similarity with the prepolymer foaming method.

3、One step foaming method

One step to add polyether or polyester polyol, polyisocyanate, water, catalyst, surfactant, foaming agent, other additives and other raw materials, high-speed mixing and foaming. Currently widely used is a one-step foaming process.

4、Manual foaming method

This is a simple method, all the main raw materials will be accurately weighed, placed in one of the standard containers, and then immediately will complete these enterprises raw materials by mixing evenly, injected into the mold or need to fill the foam space can be. The polyisocyanate is weighed in last when weighing.

These are four commonly used foaming methods, after foaming treatment can make the sponge to get better elasticity and water absorption, to meet the needs of many industries on the sponge.

Classification of sponge

1. Chemical classification

From the chemical subjects, the sponge can be divided into: ordinary sponge, slow rebound sponge, high rebound sponge.

2. Process classification

According to the production process of sponge can be divided into: cutting and molding.

Cutting is divided into ordinary sponge, slow rebound sponge (memory sponge: warmu002Fnon-warm), high rebound sponge, latex sponge.

Molded category is divided into gas sensation sponge, warm sensation sponge, ordinary slow rebound, ordinary high rebound, imitation latex enhanced sponge. Conventional pillow as well as mattress system will generally be used [gas-sensitive, temperature-sensitive, ordinary slow rebound] three categories for sponge, the general cushion will be used an ordinary high rebound research sponge city as a corporate raw materials, like lavender, coconut my pillow is often with imitation latex sponge can be made.

Cutting and molding difference: process and raw materials are different, cutting foam is foam line, molding foam is mold molding products, some molding products molding process will be more simple, and will reduce the loss of raw material waste.

In summary, from the classification point of view can be concluded as follows: sponge u003E memory sponge u003E non-temperature memory sponge, that is to say, non-temperature memory sponge belongs to the memory sponge, memory sponge, sponge. The market generally use ordinary sponge and memory sponge as the filling layer of the mattress.

Fourth, sponge density and soft hardness

1. the density of sponge is usually expressed in D

d = kg. To give a chestnut: 25D means that each cubic sponge weighs 25kg.

Ordinary China sponge: 18D-40D

Gas sensitive sponge: 28D-55D

Imitation Latex Foam: 50D-55D

Slow rebound sponge: 33D-80D

The higher the density of sponge, the higher the hardness: Generally speaking, the hardness and stiffness of sponge has nothing to do with the density, mainly by adjusting the formula to change its hardness and softness, the same sponge density can cause different hardness and softness.

2. sponge soft hardness is expressed by ILD

The higher the ILD, the harder the sponge. For example: a £20 ILD sponge indicates that the material requires £20 of pressure to compress the sponge to 25%.

Soft sponge: 20-35 ILD

Neutral Sponge: 36-40

Hard Sponge:41-45ILD

Hard Sponge (Full Attack) : 46-55ILD

Super Hard ≈ 56ILD

The normal range for slow rebound ILD is 9-15, and the normal range for regular cotton ILD is 32-45.

Sponge can be used in mattresses to regulate its hardness through different ratios, and for different groups of people, mattresses with appropriate hardness can be made.

Five, sponge common problems

1. Why the sponge will be yellow

Because in the foaming/processing process, the heat released by its own reaction can not be quickly released, resulting in yellowing of the core. Oxidation caused by ultraviolet light.

2. mattress just opened the student will have a different flavor

Sponge is a polyurethane product, all new sponges will have the same odor as a new car, especially when opened compressed packaging, but the odor is almost harmless to the human body. It is recommended that newly purchased mattresses be ventilated for 48 hours before use.

3. Will a foam mattress collapse?

This depends on the quality of the mattress. High-quality sponge foam mattress, uniform size, good durability, good resilience, so it is not easy to collapse.

What is a common memory mattress?

Memory foam scientific name is slow rebound sponge, is a kind of soft polyurethane foam. 1966 by the United States for NASA NASA's Ames Research Data Center for the relief of astronauts off the ground when the body's ability to bear the huge economic pressure and research and development.cellulose sponge factory This development sponge city contains an open network structure of molecules in order to be able to move through the action of external forces, dispersing the forces to fit our entire social contact surface.

Advantages: 1 memory foam can disperse the pressure on the human body, creating a "zero pressure" feeling, reducing the human body due to contact with the mattress and the discomfort of extrusion, and promote blood circulation in the human body. Improve sleep comfort and promote deep sleep.

Memory foam can be divided into warm memory foam and non-warm memory foam.

Warm memory foam is the mainstream memory foam material on the market at present, because its hardness and softness change with the change of temperature. The change with temperature is both his characteristic and disadvantage. For example, at temperatures below about 10 degrees Celsius, the memory hardens, especially to below 0 degrees Celsius when it is as hard as a rock. So in a cold winter room, traditional memory foam needs to absorb heat or be used for some time before it becomes soft and cozy. Common brands of cozy memory foam mattresses include: Tapper, Blue Box, and Happy Arrival.

Based on the characteristics and shortcomings of temperature-sensitive memory foam, non-temperature-sensitive memory foam, i.e. gas-sensitive foam, has been researched and modified. As the name suggests, the softness and hardness of non-temperature-sensitive memory foam will not vary significantly with temperature, allowing people to experience the comfort of memory foam in any environment. Gas-sensitive cotton uses more environmentally friendly mdi as the main raw material, making the product more environmentally friendly. Due to the special cell structure, the feel is softer and more comfortable, with strong moisture absorption, and can retain the coolness of the sponge surface. Non-temperature memory foam mattress common brands are: dream lily and so on.

Used as a pillow or corporate mattress culture can certainly be non-thermal memory foam better than warm memory foam.

Tips for selecting a memory foam mattress

Pay attention to the brand

Memory foam itself is a space material with a special physical structure. It has high requirements for raw materials and processes. It is still a technology in the world. Ordinary manufacturers and small brands simply can not produce it, is to pay attention to choose a good manufacturer's brand. At present, Guangdong memory sponge small series manufacturers do better is Jinfengqiao sponge factory, which is a collection of research and development, production and sales in one of the sponge source manufacturers.

Comparison of quality

Memory foam rebound time and density is important, rebound speed of 3-5 seconds. The higher the density, the more expensive, because the product density of the mattress can support the inner side of the knee, waist, back, neck, there is enough fit and support. According to the principle of physical force and reaction force, there is a concept called "zero pressure", that is, when we sleep, as close as possible to zero pressure infinitely. Fitting a curve that absorbs the body is enough to improve healthy sleep.

Non-warm memory foam > Warm memory foam

The front we have carried out an analysis of the difference between non-warm and warm, for a mattress non-warm memory foam material can not do with the environment temperature constantly changing as well as the seasons as one, is to ensure that the quality of student sleep management prerequisites, who wants to sleep in the summer with a soft mattress in the winter to sleep on a hard mattress?

After reading so many books, you must have a better understanding of sponge. You want to know if you are suitable for a memory foam mattress, or you want to buy a memory foam mattress, or visit some foam factories.