Manufacturing and Engineering

[ajaysinhaa-blog]

What Is PSA And What Are Its Applications?

PSA or Pressure Swing Adsorption is a technology used to separate some gas species from a mixture of gases under pressure according to the species' molecular characteristics and affinity for an adsorbent material. Specific adsorptive materials like zeolites, activated carbon, molecular sieves, etc.are used as a trap, preferentially adsorbing the target gas species at high pressure. The process then swings to low pressure to desorb the adsorbed material.

The Process

The process is based on the fact that under high pressure, gases are attracted to solid surfaces or are ‘adsorbed’. The higher the pressure, the more a gas is adsorbed. As the pressure reduces, the gas is released or desorbed. PSA processes are used to separate gases in a mixture because different gases tend to be attracted to different solid surfaces differently. For example, if a gas mixture such as air is passed under pressure through a vessel containing an adsorbent bed of zeolite that attracts nitrogen more strongly than oxygen, part or all of the nitrogen will stay in the bed, and the gas exiting the vessel will be richer in oxygen than the mixture entering. When the bed reaches the end of its capacity to adsorb nitrogen, it can be regenerated by reducing the pressure, thus releasing the adsorbed nitrogen. It is then ready for another cycle of producing oxygen-enriched air.

Applications

The above mentioned process is used in:

1.  Medical oxygen generators or medical oxygen plant

2.  Industrial Nitrogen Generators, to produce high purity nitrogen gas (99.9995% pure)

3.  Removal of carbon dioxide (CO₂) as the final step in the large-scale commercial synthesis of hydrogen (H₂) for use in oil refineries

4.  The production of ammonia (NH₃)

5.  Removal of Hydrogen Sulphide (H₂S) from hydrogen feed and recycle streams of hydrotreating and hydrocracking units.

[ajaysinhaa-blog]

Application of Masterbatches in Injection Moulding Plastic Furniture

Injection moulding is a manufacturing process for producing parts or end products by ‘injecting’ material into a mould. Injection moulding is used most commonly in thermoplastic and thermosetting polymers, but can also be used for a host of materials like metals, glasses, elastomers and confections. Material for the part or the end product is fed into a heated barrel, mixed and forced into a mould, after which it is left to cool and hardens in the form of the mould. Thus, the product is formed in the shape of the mould.

Problems with Injection Moulding and How Masterbatches Solve Them

Products formed with injection moulding have silver streak issues (formation of silver streaks on the surface of the product). Also trapped air is a major issue, and causes bubbles as well as blisters. Trapped air can be a result of many issues such as jetting, equipment problems such as non-vented core pins or too much decompression. Water vapour or decomposing by-products can also result in air or gas being trapped in the product.

Desiccant masterbatches are the solution to these problems. These are additive masterbatches produced by most large masterbatch producers, for example REPIN Masterbatches.  Desiccant masterbatches are popular as they require a proportion of only 1%-3% in the process mix, and provide outstanding results in removing the silver streaks and increasing the strength of the moulded article by eliminating bubbles of air or gas. In addition, desiccant masterbatches:

·  Improve surface finish

·  Eliminate porosity

·  Improve strength

Application in Plastic Furniture Industry

Recycled PP is majorly used to manufacture plastic chairs, furniture and crates.This is the biggest market for recycled moulding. Recycled PP tends to cause silver streaks and breakage due to moisture which results a lot of rejection for the manufacturing companies.Just with a small dosage of desiccant masterbatches from a trusted masterbatch distributor is enough to improve the quality of the product.

[ajaysinhaa-blog]

How does On-Site Nitrogen helps Plastic Injection Company stay Eco-friendly?

It’s a known fact that Nitrogen is one of the most important component of various industries. This gas is very much used in the plastics processing which is noted as the Plastics Processing in various plastic injection molding companies. The process is done by injecting the high pressure nitrogen into the respective melt as it starts to solidify so one can enable faster cooling and reduced cycle times, material consumption, warpage, distortion, sink marks and other surface defects which is noted as the most aesthetically pleasing packaging; as well as increased production rates. The extreme cold, inert nitrogen can also help in the reduction of heat produced in the grinding process, that results in high-quality, very fine, uniformly sized particles.

Every company wants to be known as an environmentally conscious company plus they always want to save money on their nitrogen, with the use of Nitrogen Generators they are able to achieve such goals. An on site Nitrogen Generator also helps to eliminate the weekly truck deliveries that saves time, energy as well as the cost of the nitrogen.

Such generators are equipped with High Pressure Nitrogen System that provide an efficient, economical way to obtain the high-volume, high-pressure gas for the injection molding process that helps to achieve pressure uniformity throughout the molding process. Plus, they also provide constant pressure, maintaining your house line pressure while minimizing refrigerant losses. Such systems also maximize the productivity as well as improve the bottom line of every Plastic Injection Company.