Industry News

Frequently occurring problems on the surface of ABS sheets: White streaks, bubbles, and cloudy watermarks frequently appear on the sheet surface. There are four main causes: 1. Insufficient raw material drying (ABS is highly hygroscopic, with a moisture content > 0.05%) 2. Excessively high barrel/die temperature, leading to thermal decomposition and gas generation from the material 3. Poor venting, insufficient screw back pressure, and air entrapment in the melt 4. Dead corners in the die flow channel, causing melt retention and degradation.

What are the applications of root control meshes? Root control meshes are used in a wide range of applications, from professional nurseries to home use, from common seedlings to rare varieties, and from lowland seedling cultivation to afforestation in saline-alkali land/barren hills. Why are root control meshes used so widely? Roots grow in separate zones without tangling, with good aeration and drainage, allowing for precise control of the seedling growth environment, improving seedling survival rate and uniformity, and making them suitable for large-scale, refined seedling cultivation.

The core reason for defects in ABS sheet extrusion line: 1. Excessive or uneven cooling rate: A large temperature difference between the upper and lower surfaces of the sheet prevents the release of internal stress. 2. Excessive tension in the traction machine: This causes excessive longitudinal stretching, leading to sheet shrinkage and warping.

Core Causes: 1. Insufficient raw material drying: This easily leads to bubble formation during extrusion; uneven mixing of moisture and melt results in silver streaks. 2. Localized overheating of the extruder barrel: Excessive temperature causes degradation of the ABS molecular chains, producing small volatile molecules that form surface pitting. 3. Impurities or excessive moisture in recycled material: Failure to re-dry recycled material or the presence of dust after pulverization exacerbates defects.