What is the reason for the black spots in plastic bottles?

What are the reasons for the formation of black spots in plastic bottles? The following health care product plastic bottle manufacturers introduce to you:

Pre-storage degreasing inspection can effectively prevent the oil and rust stained goods and raw materials from being mixed into the damaged materials (especially during the production process rather than during the initial test); the mold gates are too small or rough A lot of friction heat occurs. If the mold is poorly ventilated, it will cause the gas to burn to produce significant black streaks; the dryer motor will operate for a long time, and it will need to be cleaned regularly.

The filter should also be cleaned and replaced regularly. Otherwise, it will enter foreign matter or cause discoloration and agglomeration of the raw materials due to poor ventilation. The dryer is not sealed due to negligence of the staff or lack of working equipment, resulting in dust entering the air; Perhaps the dust is scattered, polluting the surrounding goods and destroying the materials inside the machine; perhaps the barrel is too large, the operation is not easy, and the corners are neglected, so that the barrel is not thoroughly cleaned during the refueling process; the cover of the destruction machine is not in place, resulting in Additional information on pollution and pollution.

The destroyer should be used as black and white as possible. If the nozzle aperture is too small or the inner surface is rough, a lot of friction heat will occur. If the mold is poorly exhausted, the gas will be burned to produce obvious black streaks; the barrel or the rubber head will be cracked. In the case of tortuous, a part of the polymer is overheated to form a black streak; when the apron is worn, the advancement of the melt cannot be smooth, and the appearance of the extruded material causes excessive gas in the material tube, and when the injection is smooth, it occurs due to sharp friction. Black lines.

The outer diameter of the outer ring of the rubber ring and the tolerance of the gap of the cylinder wall are too small, so that the frictional heat of the screw melt occurs on the large resistance surface, causing the black grain to occur; the temperature is not correct, the actual temperature of the electric heating piece and the temperature gauge are too large, and a certain temperature is overheated. It is not easy to be intuitive. It needs to be inspected by the measuring device; the material itself has black spots, and the share of this black spot exceeds the allowable scale of the customer's incoming inspection or the allowable specification of the product; the original material bag is damaged during transportation, transfer and storage. It is contaminated and mixed with foreign matter.

The material is mixed with impurities during artificial proportioning or material preparation; some materials need to increase the lubricant. If the increase is lacking, the friction heat will occur, because the exhaust gas is too much to sweep out, and the black matter (black spots) is formed by gas incineration; The original material itself lacks heat resistance and cannot withstand the temperature of the working temperature (increased agent). The material bag or the reserved material bag is unclean, and when it is used again, the foreign matter is mixed.

The above is all the contents of the health care product plastic bottle manufacturer to introduce to you today, for reference only.