Can pvc fiber reinforced hose pass drinking water?Can pvc fiber reinforced hose pass drinking water?
PVC fiber-reinforced hose is a composite material mainly used for agricultural irrigation and spraying, which can be seen everywhere in daily life. However, many people don't know much about it. Today, I will introduce the content of PVC fiber reinforced hose.
PVC fiber reinforced hose and pvc grid tube, commonly known as plastic snake skin tube, suitable for pressure or corrosive gas and liquid transportation, widely used in machinery, coal mines, petroleum, chemical industry, non-irrigation, construction, civil (Solar water heater, gas tank) and other fields. It is also widely used for garden and lawn watering. It is mainly composed of automatic feeding machine, extruder, spray water tank, tractor, winding machine, hot melt machine, winder and so on.
Is the PVC fiber reinforced hose toxic?
If the PVC plasticizer is volatilized, the plasticizer of the hose is mainly dioxin, dimethyl ester, etc. This type of plasticizer contains benzene. If it is in such an environment for a long time, it may cause cancer. note.
How are the two layers of PVC inside and outside of the PVC fiber reinforced hose bonded so firmly?
The two extruders are co-extruded. First extrude the inner tube, then weave the reinforcing fiber through the braiding machine, and then extrude the outer tube through the die of the second extruder. It is not difficult to understand that the two layers are tightly integrated. The processing technology of the extruder: his screw rib depth is gradual, divided into feeding section (front, deepest is the largest space), compression section (shallow depth), melting section (shallower), homogenization section (sometimes) Combined with the melting section); the raw material enters the feeding section, becomes soft when heated, and is pushed forward by the screw to the compression section. The temperature setting of this section is higher than that of the feeding section, and begins to melt. When the latter two sections reach their plasticization , Extruded through the die, the temperature is still very high, the surface is very sticky. When the inner tube passes through the outer die (its temperature is above 120 degrees), the outer surface melts and naturally combines with the raw materials of the second extruder. In fact, the PPR tube that appeared later replaced the aluminum-plastic tube quickly because the joints were fusion welded and never leaked.
Good PVC reinforced pipes, non-toxic organic tins are used as stabilizers. Some plasticizers use dioctyl ester or dibutyl ester. They are used in conjunction with epoxy soybean oil. If there is a requirement for cold brittleness (not brittle at low temperature) ), The plasticizer should use "cold protection oil", there are many small factories, plasticizers use chlorinated paraffin, aging soon is a fake product.
It is best to note that lead salt stabilizers are added during the use of PVC fiber reinforced hoses, and lead is toxic to humans; PVC fiber reinforced hoses contain heavy metals that will precipitate out into drinking water and endanger human health. Therefore, please don't drink the water of PVC fiber reinforced hose directly. Long-term consumption may cause cancer risk.
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