Noticias

12 Jun

El proceso de producción de PP.(3)

The core equipment of the process is MZCR (multi zone circulation reactor system) reactor R230 system. The reactor consists of riser and downcomer. In the riser, the polymer is blown upward through the reaction gas to form fluidization, which is sent to the upper part of the downcomer to pass through the cyclone separator, and the powder is collected in the downcomer. The reaction gas is circulated by the centrifugal compressor through the external pipeline, and the reaction heat [...]

Por Lee mas...
11 Jun

El proceso de producción de PP.(2)

Process features: (1) no solvent is added in the system, propylene monomer is polymerized in liquid phase in the kettle reactor, and ethylene propylene is polymerized in gas phase in the fluidized bed reactor; (2) simple process, less equipment, less investment, low power consumption and production cost; (3) polymerization is carried out in the kettle stirring reactor (Hypol process) or the loop reactor (Spheripol process) Random copolymerization and block copolymerization were carried out in a stirred bed reactor.The typical [...]

Por Lee mas...
10 Jun

El proceso de producción de PP.(1)

Polimerización en solución Características del proceso: (1) usando hidrocarburo de cadena lineal de alto punto de ebullición como solvente, operando a una temperatura superior al punto de fusión del polipropileno, todos los polímeros obtenidos se disuelven en el disolvente y se distribuyen uniformemente; (2) high temperature gas extraction method is used to evaporate and remove the solvent to obtain molten polypropylene, and then extrude and granulate to obtain granular products; (3) only Kodak company in the United States is the manufacturer.Liquid phase bulk method The liquid-phase bulk [...]

Por Lee mas...
09 Jun

El proceso de producción de PP.

Polypropylene resin is one of the four general thermoplastic resins (polyethylene, polyvinyl chloride, polypropylene, polystyrene). It is produced by polymerization with propylene as raw material and ethylene as comonomer. The production process of polypropylene mainly experienced several development stages, such as solvent method, solution method, liquid-phase bulk method (including liquid-phase gas-phase combination) and gas-phase method. In the world, the process methods used to produce polypropylene are divided into the following categories: solvent method, solution method, liquid-phase bulk method (including liquid-phase [...]

Por Lee mas...
08 Jun

La característica de PP

PP es un incoloro, inodoro, sustancia sólida no tóxica y translúcida. polipropileno (PÁGINAS) es un tipo de resina sintética termoplástica con excelentes propiedades. Es un plástico general ligero termoplástico incoloro y translúcido.. Tiene resistencia química, resistencia al calor, aislamiento electrico, high-strength mechanical properties and good high wear-resistant processing performance, etc., which makes polypropylene rapidly developed and applied in many fields such as machinery, automobile, electronic and electrical appliances, architecture, textile, packaging, agriculture, forestry, fishery and food industry since it [...]

Por Lee mas...
05 Jun

Daily care of dermis

1. After long-term contact with the outside world, the leather will produce moisture inside. It should always be placed in a ventilated place for drying to prevent bacteria from breeding. It can also be stored with a proper amount of moisture-proof beads. 2. If the leather gets damp inadvertently, it should be absorbed by dry cloth, and then placed in a cool and ventilated place. It should be naturally dried in the shade. It should not be placed in the [...]

Por Lee mas...
04 Jun

La diferencia de cuatro tipos de corteza.

Piel de carnero Los poros de la superficie del cuero son achatados., pequeño y dispuesto en escamas de pez. En general, varios poros forman un grupo. El cuero es suave y elástico.. piel de cerdo Los poros de la superficie de la piel de cerdo son redondos y gruesos., que tienden a penetrar en el cuero. The pores are generally arranged in a group of three pores. There are many small triangles on the surface of pigskin, with poor elasticity and thick skin. cowhide The surface pores of cattle hide are round, compact [...]

Por Lee mas...
03 Jun

The difference of four kinds of leather

Different types of leather have different characteristics and uses. Por ejemplo, cow leather with thin surface and high strength is the most suitable for making leather shoes; sheepskin leather is light, thin and soft, which is the ideal fabric for leather clothing; pig leather has good air permeability, water permeability and vapor permeability.Pigskin The pores on the surface of pigskin are round and thick, which are inclined to extend into the leather. The pores are arranged in a group of [...]

Por Lee mas...
02 Jun

Identificar cuero y cuero sintético

Con los cuatro métodos básicos de identificación anteriores, podemos comparar e identificar cuero y cuero sintético (cuero artificial y cuero sintético se refieren a productos con algunas características de cuero natural producidos por diferentes materiales de resina y coadyuvantes de procesamiento a través de diferentes procesos de procesamiento, also known as artificial leather and imitation leather; there is no clear and unified definition between artificial leather and synthetic leather, so there are also some people They are called synthetic leather without distinction. The author thinks [...]

Por Lee mas...
01 Jun

Método de identificación del cuero.

vista de ojo Hay poros y patrones claros en la superficie del cuero., poros finos simétricos en la piel del ganado, poros gruesos y escasos en la piel de yak, y poros de escamas de pescado en la piel de cabra. Whether leather surface has pores or not is an important feature to identify leather authenticity.Nasopharynx All leather has the smell of leather, while synthetic leather has a strong plastic smell. light Tear off a little fiber from the back of real leather and artificial leather. When ignited, artificial [...]

Por Lee mas...