Schrijver - polaris

12 juni

Het productieproces van 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 [...]

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11 juni

Het productieproces van PP(2)

Proceskenmerken: (1) er wordt geen oplosmiddel aan het systeem toegevoegd, propyleenmonomeer wordt gepolymeriseerd in vloeibare fase in de ketelreactor;, en ethyleenpropyleen wordt in de gasfase gepolymeriseerd in de wervelbedreactor; (2) eenvoudig proces, minder apparatuur, minder investering, 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 [...]

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10 juni

Het productieproces van PP(1)

Solution polymerization Process features: (1) using high boiling point straight chain hydrocarbon as solvent, operating at a temperature higher than the melting point of polypropylene, all the polymers obtained are dissolved in the solvent and distributed uniformly; (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 [...]

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09 juni

Het productieproces van 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 [...]

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08 juni

The characteristic of PP

PP is a colorless, odorless, nontoxic and translucent solid substance. Polypropylene (PP) is a kind of thermoplastic synthetic resin with excellent properties. It is a colorless and translucent thermoplastic light general plastic. It has chemical resistance, heat resistance, electrical insulation, 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 [...]

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05 juni

Hawaiiaanse overhemden en poloshirts zijn gebruikelijk

1. Hawaiiaanse overhemden en poloshirts zijn gebruikelijk, Hawaiiaanse overhemden en poloshirts zijn gebruikelijk. Hawaiiaanse overhemden en poloshirts zijn gebruikelijk. Hawaiiaanse overhemden en poloshirts zijn gebruikelijk. 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 [...]

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04 juni

Het verschil tussen vier soorten cortex

schapenvacht De poriën op het leeroppervlak zijn afgeplat, klein en gerangschikt in vissenschubben. Over het algemeen, meerdere poriën vormen een groep. Het leer is zacht en elastisch. varkensleer De poriën op het oppervlak van varkensleer zijn rond en dik, die geneigd zijn in het leer door te dringen. 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 [...]

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03 juni

Kenmerken van UV-printtechnologie

Kenmerken van UV-printtechnologie. Bijvoorbeeld, Kenmerken van UV-printtechnologie; Kenmerken van UV-printtechnologie, Kenmerken van UV-printtechnologie, Kenmerken van UV-printtechnologie; 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 [...]

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02 juni

Identify leather and synthetic leather

With the above four basic identification methods, we can compare and identify leather and synthetic leather (artificial leather and synthetic leather refer to products with some characteristics of natural leather produced by different resin materials and processing aids through different processing processes, 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 [...]

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01 juni

Classificatie van rode wijn

Classificatie van rode wijn, Classificatie van rode wijn, Classificatie van rode wijn, Classificatie van rode wijn. 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 [...]

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