Material de resistencia a alta y baja temperatura Rollo de plástico PP para bandejas termoformadoras de alimentos congelados

Description of High and low temperature resistance material PP plastic roll for thermoforming trays of frozen food

El polipropileno, una especie de plástico, es un polímero lineal con alta densidad, sin cadenas laterales y alta cristalinidad. Tiene excelentes propiedades integrales. Productos comunes: cuencas, barriles, muebles, películas, bolsas tejidas, tapas de botellas, parachoques de automóviles, etc.
PP Plastic, Nombre químico: polipropileno Nombre del inglés: polipropileno (abreviado como PP) Gravedad específica: 0.9-0.91 g/cm3 El contracción del moldeo: 1.0-2.5% Temperatura de moldeo: 160-220 ℃ PP es un polímero cristalino, PP es el rendimiento comprensivo que el material de PE es mejor. Los productos PP tienen peso ligero, buena resistencia y buena resistencia química. Desventajas del PP: precisión de baja dimensión, rigidez insuficiente, mala resistencia al clima, tiene un fenómeno posterior a la Shrinkage, después del desmoldeo, es fácil envejecer, volverse frágil y fácil de deformarse. En la vida diaria, la caja de frescura comúnmente utilizada está hecha de material PP.

PP polyester is a kind of amorphous, its melting point should be above 220, and its heat distortion temperature should be about 121 degrees, but since it is a macromolecular polymer after all, the higher the temperature, the more likely it is that small analytical oligomers will precipitate Most of these substances are not good for human health, and according to the customer’s use, the general boiling water is 100 degrees, so the general plastic cups will not ser etiquetado con más de 100 grados.
 

If you want to know whether pp material is poisonous, let’s first have an accurate understanding of the nature of pp material. The so-called pp material is what we usually call polypropylene in our daily life. It is a white translucent without side Chain, high-density linear polymer, has good oil resistance and weak acid and alkali resistance, and has good overall performance. It is often used in the production of household items, barrels, basins, bottle caps and so on.
In the pp material, high-purity propylene is used as the main material, which contains a small amount of ethylene copolymer, which is dried, mixed, extruded, granulated, sieved and homogenized into polypropylene particles. The particles are cylindrical, the particles are very smooth, without any mechanical impurities, it has good mechanical properties and heat resistance, and it is non-toxic when used in the temperature range of minus 30 degrees Celsius to 140 degrees Celsius.

The PP microwave meal box is the only plastic box that can be put in the microwave oven and can be reused after careful cleaning. Special attention should be paid to some microwave lunch boxes. The box body is indeed made of No. 5 PP, but the lid is made of No. 1 PE. Because PE cannot withstand high temperatures, it cannot be placed in the microwave together with the box. To be safe, remove the lid before placing the container in the microwave.