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Experimental Description Of Pp Shopping Bag Material
Oct 31, 2017

For the choice of polypropylene raw materials, "a look at the two bites three burning four", look at the surface of raw materials, the surface of the wax, black without bubbles is a good regeneration material, take a particle of light bite on the teeth, more hard is polypropylene recycled raw materials particles, biting is a good pp recycled particles, the softer is the PE type of recycled raw particles Put the particles on the flames, burn them out of the flames, flame color bottom blue, top yellow, and in the process of combustion has a large number of black smoke, melting drip, emitting oil odor is pp renewable raw materials, in the molten state can continuously pull out fine silk is pp again raw materials, pulling out the silk head short, The burning of wax-like odor of polyethylene-re-meal particles.pp shopping bag


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Polypropylene (PP plastic) is the development of nylon after another fine resin varieties. Look at the appearance of raw materials, the surface of the wax sense, black without bubbles is a good recycled material, the PP recycled meal particles on the flame ignited, leaving the flames can burn themselves, the flame color bottom blue, the top yellow, and in the process of burning a large number of black smoke, melting drip, emitting oil odor is pp recycled raw materials.pp shopping bag

Polypropylene (PP plastic) is the development of nylon after another fine resin varieties, it is a high-density, no side chain, high crystallization of the necessary linear polymers, with excellent comprehensive performance. White translucent when not colored, waxy; Transparency is also better than polyethylene, more rigid than polyethylene.pp shopping bag

PP Plastic properties: crystalline material, hygroscopic small, prone to melt rupture, long-term and hot metal contact easy to decompose. The fluidity is good, but the shrinkage range and the shrinkage value are big, easy to occur the shrinkage hole. Dent, deformation. Fast cooling, pouring system and cooling system should be slowly cooling, and pay attention to control the molding temperature. The direction of material temperature is obvious. Low temperature and high pressure, especially when the mold temperature is below 50 degrees, the plastic parts are not smooth, easy to weld poor, leaving scars, more than 90 degrees prone to warping deformation.pp shopping bag