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1.50 holes black seedling tray First of all, the 50 holes black seedling tray can be used as a seed trays and pots, and secondly, because the number of holes in the 50 holes black seedling tray is more, and then it is called a large seedling tray in daily life and agriculture.
2.The difference between PP material and PS material for black seedling tray with 50 holes
PP material has the characteristics of non-toxic, tasteless, health, high mechanical strength, good barrier performance, etc., can be used in industry, agriculture, fruit and other industries. PP blister has: environmental protection, beautiful appearance, screen printing, offset printing, hot stamping, high temperature resistance, low temperature resistance, high transparency, deflection resistance, the product meets the food testing standards, and can be heated by microwave. The disadvantages of PP: low dimensional accuracy, insufficient rigidity, poor weather resistance, easy to produce "copper loss", post-shrinkage phenomenon, easy aging, brittle, easy deformation after demoulding.
PS hard film density is low, poor toughness, easy to burn, burning will produce harmful gases, so it is generally used to make a variety of industrial blister tray packaging. PS sheet is a new type of environmentally friendly packaging material developed in recent years. It has excellent thermoforming performance, good environmental protection performance and health performance, and is widely used in medicine, food and toys.
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