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Do you know the characteristics of high-density sponge?
Release time:
2020-11-30 17:29
The common sponge on the sales market is also divided into two categories: imported and domestic. In the past, it was very easy to distinguish from the appearance and touch. Imported sponge has good ductility, thin and well-proportioned, light net weight, stable quality and slightly soft touch. The arc ball rotates strongly and the route is standard. The net weight of domestic sponge is heavier, the ductility is slightly different, and the touch is slightly hard. Some of the loops float and move down (as the saying goes, better than thieves).
Common sponge is divided into 30 degrees -55 degrees (from soft to hard) according to strength, and the thickness is generally in the middle of 0.3-2.3mm. The production and processing of high-density sponge products are different. Although sometimes the myopia degree at the base price is the same, the malleability of sponge produced by manufacturers is still different. Pay attention when buying.
classification of sponge:
① General sponge (from 15 relative density to 50 relative density)
② Jingdian sponge (without all fillers, well-proportioned cells, excellent tensile strength, ductility and other compressive strength)
③ flame retardant sponge (white, gray black, dark gray, blue and other relative density specifications and models of goods)
④ Mesh, filter sponge (coarse, medium and micro-pore sponge of various colors)
⑤ Special sponge (polyester type, methacrylate type, conductive type, anti-static type, etc.)
⑥ Hardening sponge (harder, hard and various strengths)
⑦ High density sponge (28d, 30d, 33d, 40d, etc.)
⑧ Light soft foam sponge
⑨ Slow rebound sponge
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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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