Bahan resistansi suhu tinggi dan rendah PP Plastik gulungan untuk baki termoforming makanan beku

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

Polypropylene, sejenis plastik, adalah polimer linier dengan kepadatan tinggi, tidak ada rantai samping, dan kristalinitas tinggi. Ini memiliki sifat komprehensif yang sangat baik. Produk umum: cekungan, barel, furnitur, film, tas tenunan, tutup botol, bumper mobil, dll.
pp plastic, chemical name: polypropylene English name: Polypropylene (abbreviated as pp) Specific gravity: 0.9-0.91 g/cm3 Molding shrinkage: 1.0-2.5% Molding temperature: 160-220℃ PP is a crystalline polymer, PP is Comprehensive performance is better than PE material. PP products have light weight, good toughness, and good chemical resistance. Disadvantages of PP: low dimensional accuracy, insufficient rigidity, poor weather resistance, it has post-shrinkage phenomenon, after demolding, it is easy to age, become brittle and easy to deform. In daily life, the commonly used fresh-keeping box is made of PP material.

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 be labeled with more than 100 degrees.
 

Jika Anda ingin tahu apakah materi PP beracun, mari kita pertama -tama memiliki pemahaman yang akurat tentang sifat materi PP. Bahan PP yang disebut adalah apa yang biasanya kita sebut polypropylene dalam kehidupan kita sehari-hari. Ini adalah tembus putih tanpa rantai samping, polimer linier densitas tinggi, memiliki ketahanan minyak yang baik dan asam lemah dan ketahanan alkali, dan memiliki kinerja keseluruhan yang baik. Ini sering digunakan dalam produksi barang -barang rumah tangga, barel, cekungan, tutup botol dan sebagainya.
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.