Is sponge poisonous? What effect does long-term contact have on people?

Sponges are all polyurethane foams. If they are qualified sponges produced by regular manufacturers, they are not toxic. If sponge is recycled and reloaded, it will breed bacteria.

Sponge:

Sponge is a porous material with good water absorption and can be used for cleaning articles. Sponges commonly used by people are made of lignocellulosic fibers or foamed plastic polymers. In addition, there are natural sponges made of sponges, which are mostly used for body cleaning or painting. In addition, there are three kinds of synthetic sponges made of other materials, namely low-density polyether (non-absorbent sponge), polyvinyl alcohol (super absorbent material without obvious pores) and polyester.

Sponge production technology:

A, mixing foaming resin, foaming auxiliary agent and adhesive resin (making finished adhesive);

B, carrying out foaming treatment. 80 parts of ethylene vinyl acetate (EVA), 20 parts of APAO PT 3385, 20 parts of azodicarbonamide, 19 part of CaCO and 0.6 part of dicumyl peroxide were mixed together, foamed in a mold, and the closed holes were broken by mechanical force, thereby preparing a foam sponge. Its density (d) is 0.028 g/cm, and its 25% compressive hardness is 65438 0.9 kPa.

Just like foaming, the same material and different manufacturing processes will make different things.

PU sponge mainly includes polyester and polyether, which can be sliced or rolled, and can also be processed by compound processing, hot pressing and sandblasting according to customer requirements. PU sponge has the characteristics of heat preservation, heat insulation, sound absorption, shock absorption, flame retardant, antistatic and good air permeability, and it involves various industries, including automobile industry, battery industry, cosmetics industry, bra and underwear manufacturing, high-end furniture manufacturing and so on.

Selection of sponge:

1. When selecting a sponge, its tactile sensation and elasticity are the primary judging factors. It should be soft and malleable to the touch.

2. In addition, one of the most practical identification methods is to fold the sponge in half and rub it against each other. If the sponge crumbs fall off without rubbing a few times, it should be eliminated.