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Is there any difference between high density sponge and high resilience sponge
Release time:
2020-09-09 10:15
What is the difference between high density sponge and high resilience sponge:
The structural characteristics of high resilience sponge: strong resilience and breathability, low damage after encounter, high reduction load ratio, good flame retardancy, good thermal embrittlement, wet embrittlement and driving force fatigue.
The basic principle of high resilience sponge: EO is generally selected for end-sealing, methacrylate specificity is very large, the diameter and size of sponge foam produced are mixed all over, the frame size is different, and there is a very large opening rate.
classification of high density sponge:
The way sponge is distinguished in the field is divided by relative density, and the relative density of sponge is KG/M3. is the net weight per cubic sponge. Common sponge according to the structure is divided into high density sponge, molar mass formula sponge, low density sponge three. High density of sponge, porous, very mellow, often used to do silencing cotton, sofa cushions, hard bags and other raw materials.
According to the expression of China's customs units, the relative density ≥ 25 is the high density, the relative density is the molar mass formula in the middle of 24~18, and the relative density <18 is the low density.
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How to identify natural sponge and artificial sponge?
Compared with artificial sponges, natural sponges do not have static electricity that hurts the human body, do not peel off and last long. The sponge that lives in the sea is the real sponge, and the artificial "sponge" just imitates the structure of the natural sponge. Natural sponges that live in seawater are mostly grayish yellow, brown or black lumps. Its body surface has many bulges, there are many small holes beside the bulge, and there is a large hole at the top of the bulge. Seawater flows in from small holes and out from large holes, and those tiny creatures enter the sponge with the water and become "self-contained" food. Therefore, although the sponge is called "the flowers and fruits of the sea", it looks like a plant, but it is actually an animal.
Buy a pack of large salt or coarse salt, put the coarse salt and dirty plush toys into a larger plastic bag, and then fasten the mouth of the bag tightly and shake it vigorously. You will surely find that the plush toys are clean. The crude salt removed became gray-black due to the adsorption of dirt. The principle is the use of salt that is sodium chloride adsorption of dirt. Soda powder can also be used instead of coarse salt, the same usage. This method is more suitable for large plush toys and plush toys that can not be washed with sound.
The main ingredient of the sponge?
Polyurethane soft foam rubber, polyurethane is one of the most common polymer materials in life, widely used in the production of various "sponge" products. Now there are three kinds of sponges on the market, 1: polyurethane type, burning to generate a large number of cyano-containing gases, these gases are very toxic and suffocating. 2: polyethylene type, combustion of carbon-containing gas, this kind of gas toxicity. 3: polystyrene type, this kind of foam burning decomposition of a small amount of styrene monomer, toxic, but not as toxic as polyurethane.
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