One: The eccentricity of the plastic bottle bottom may be related to the temperature of the plastic preform, stretching, pre-blowing, high-pressure blowing, etc.
Two: When the bottom of the plastic bottle is white, it is generally due to excessive stretching, or the plastic preform is too cold, or the pre-blowing pressure is too high, or the pre-blowing is too early.
Third: the plastic bottle partially whitish, usually due to excessive stretching, or the whitish temperature is too low, or hit the stretching rod, or pre-blowing too early.
Four: The upper and lower thickness conditions are generally due to pre-blowing too early, which can reduce the pre-blowing pressure, or reduce the air flow, or delay the pre-blowing time.
Five: There is a magnifying glass phenomenon at the bottom of the plastic bottle, which is generally due to the pre-blowing too late, or the pre-blowing pressure is too low, or the plastic bottle bottom material is too much.
a href="/wp-content/uploads/2018/08/yuming-fujian.rar">Project completion environmental protection acceptance monitoring report form
