Author: Daniel

Blown Film Extrusion Introduction

Blown Film Extrusion Introduction

Blown Film Extrusion Introduction
Blown film extrusion is a technology that is the most common method to make plastic films, especially for the packaging industry. The process involves extruding a tube of molten polymer through a die and inflating to several times its initial diameter to form a thin film bubble. This bubble is then collapsed and used as a lay-flat film or can be made into bags. Usually polyethylene is used with this process, and other materials can be used as blends with these polymers. A diagram of a polyethylene chain is shown in Figure 1 to the right.
Background Theory on Polymers

In the cooling step of blown film extrusion, the amorphous, transparent melt crystallizes to form a translucent, hazy, or opaque film. The point where opacity begins in the bubble is known as the frost line. 
Fig 1: Model of polytheylene chain frompolyethylene Wikipedia article.The frost line height is controlled by several parameters: the air flow, film speed, and temperature difference between the film and the surroundings. Properties of the film, such as tensile strength, flexural strength, toughness, and optical properties, drastically change depending on the orientation of the molecules. As the transverse or hoop direction properties increase, the machine or longitudinal direction properties decrease. For instance, if all the molecules were aligned in the machine direction, it would be easy to tear the film in that direction, and very difficult in the transverse direction.

The Film Blowing machine Process

Fig 2: Schematic of set-up from User:J.Chiang.

Typically, blown film extrusion is carried out vertically upwards, however horizontal and downward extrusion processes are now becoming more common. Figure 2 shows a schematic of the set-up for blown film extrusion. This procedure consists of four main steps: The polymer material starts in a pellet form, which are successively compacted and melted to form a continuous, viscous liquid. This molten plastic is then forced, or extruded, through an annular die. Air is injected through a hole in the center of the die, and the pressure causes the extruded melt to expand into a bubble. The air entering the bubble replaces air leaving it, so that even and constant pressure is maintained to ensure uniform thickness of the film. The bubble is pulled continually upwards from the die and a cooling ring blows air onto the film. The film can also be cooled from the inside using internal bubble cooling. This reduces the temperature inside the bubble, while maintaining the bubble diameter. After solidification at the frost line, the film moves into a set of nip rollers which collapse the bubble and flatten it into two flat film layers. The puller rolls pull the film onto windup rollers. The film passes through idler rolls during this process to ensure that there is uniform tension in the film. Between the nip rollers and the windup rollers, the film may pass through a treatment centre, depending on the application. During this stage, the film may be slit to form one or two

Home Cleaning Tips Everyone Should Use

Home Cleaning Tips Everyone Should Use

Everyone has to clean their homes at some point. While it may not be a fun task or one most people look forward to, it’s something that has to be done. To help make this process easier and ensure stellar results are achieved every time, consider using some of the professional cleaning tips found here.

The Ceiling Fan

Ceiling fans need to be cleaned, at the very least, once a month (with more often being better). For the most painless way to clean a fan effectively gather supplies first. The things needed include a pillowcase, dusting spray, and a ladder. That’s it.

Spray the interior of the pillowcase with the spray, which will help to clean the blades of the fan and help prevent more dust from accumulating. Climb the ladder and cover the fan blade with the pillowcase. Slide the pillowcase down the blade and all the grime and dirt will come off with it.

Freshen the Mattress

Washing a mattress isn’t possible. However, there are steps that can be used to help it look, smell, and feel fresh. What’s needed includes a vacuum cleaner that has a furniture attachment, essential oil, and baking soda.

Take all the bedding off of the mattress, put baking soda and the essential oil in a container, and mix everything together. Once combined, sprinkle the mixture over the mattress. Let the mixture sit on the mattress for a few hours and then vacuum the lingering baking soda away. This will leave the mattress clean and smelling great.

Steam Clean the Microwave

Cleaning the microwave requires lemon essential oil, a spray bottle, sponge and water. Put the wet sponge in the unit and fill up the bottle with water and a few drops of the essential oil. Spray the unit and close the door. Run the microwave for about two minutes with the sponge inside. Once done, use the sponge to wipe away any lingering grime.

With these cleaning tips, anyone can make short work of chores and housework. Be sure to keep the information here in mind to have a clean and sparkling home.…

Doing Labels The Right Way

Doing Labels The Right Way

Reasons to Use Labels in Organizing Documents

Are you the person that doesn’t like clutter? If we need a document that is the only time we consider it as important. The reality is that we may face problems when we are unable to locate an important document. It is either the document is lost or it is because of poor document organization. It is a skill that one should acquire when trying to store documents. There are times that you simply toss the document, without realizing that you may need to get the same document in the future.

There simply a lot of papers that lie around our place of work and it can be a challenge to know how to organize. Always, there is a risk of losing the documents completely. Yet, with a few steps, one can easily organize some paperwork. But before you move to organize the paperwork, you need to get some cabinet where you are going to put the papers. It is going to be a great idea to have a filing cabinet where the documents will be stored. It is important to know the volume of the paperwork you need to store. This will be the one that is going to determine how large the filing cabinet will be. The storage system will also need some manila folders and even labels for the identification of the documents.

We need to emphasize the need to use labels. When storing paper files, the labels can help show that an office is organized and efficient. To those working in home offices, this is also something that can work in a small office too. The labels are being used as a means to provide a visual aid for anyone who is looking for a certain folder where a document is being stored. The labels function as a way for easy retrieval of documents with tons of paperwork being stored in an office or any other organization. The reality is that labels are being used to easily locate the documents being stores in cabinets or shelves. Labels are being used as guide cards that can make it easier to locate other documents that are related. It would be easier to look for certain content with the help of labels thus can save a lot of time and effort.

Exhibit labels or legal stamps are important for legal offices to locate a certain document right away. These customized labels are being customized in such as a way to make it easier to identify certain file folders and to locate a certain document.

Use the labels for the proper identification of pleading, exhibits, court-related letters and communications.

A 10-Point Plan for Labels (Without Being Overwhelmed)

A 10-Point Plan for Labels (Without Being Overwhelmed)

The Beginner’s Guide to

The Beginner’s Guide to

What You Need To Have In Mind When Selecting The Best Web design Agency For Your Business

When you are looking for a reliable agency to take care of your digital needs, you need to make sure that you will get a web that will help you in various ways. That is why you need to see more here before you choose the best agency possible. That is why it is necessary to be sure that you have the correct info on what to look for to help you get the best company for your web design. The following are some of the factors that are supposed to help you when you are deciding on the right company for your web design.

The first thing to think about is the portfolio. If you are dealing with a well-established and trusted web design it will have collection where they showcase their projects. Any web design company that is willing to share their collection on the website demonstrates their confidence in what they have achieved. You can also be sure that they will help you in advertising your products. It is also good if you get more information from the Arvig Media about advertising.

You also need to ensure you know something about their knowledge. One way of making sure you are handling your design process in the right way is to ensure you hire the right agency with the right expertise that you need. There are many website design companies like the website design st cloud mn that can help you, but you have to be sure if their expertise. That is important if you have to have the right company dealing with your web design needs for your business. It is important for you to know that you have a developer with skill in various parts of web design like the digital marketing and search engine optimization.

The other thing that you need to think about is the credibility of the design company. You need to make sure that you hire a credited company that has the license as well as insurance cover. That will help you to be sure that you will get the right services that you are looking for to serve your business.

As you design your web, communication is something that is very important. As the company develops the website for your business; you need to make sure that you follow the process well. You also should make sure that you keep the company emerged during the process. You need to make sure that the company producing the internet is getting good clients feedback. At the same time choosing a company that will work within your budget is a great gain. Get quotes from more than one web development agency. That way you are sure you will get one willing to work within your budget.…

– My Most Valuable Advice

– My Most Valuable Advice

How to Choose the Best Web Design Company in Kansas City

As years pass by, the patent things are becoming in all sectors including business management and that is good and should be appreciated. For example, through your business website, it has become an easy way to find more customers especially by the fact that you can reach as many people as possible across the globe. However, it is important to understand that for you to benefit from a business website attest be functional and user-friendly and that is the work you have to focus on today which is not a lot but that is your way out. This website requires continuous updating and optimization if it asked to generate more leads especially because customer taste and preferences change over time and you need to know how to communicate. This can be too much if your company is handling very important projects and that is why outsourcing web design services is very important. Discussed below are some considerations to make when choosing the best kansas city website design companies.

Many companies have been caught trying to create fake reviews to increase traffic on their page and that is very damaging for companies especially when it is noticed and this is something you should avoid doing. The most important thing to do when choosing Web design services is to work with the company that will with no doubt help you create traffic for your website and that is why you need to visit their online page and view here for more info about them so that you can be informed.

Always consider working with a very experienced company went comes to web design services in Kansas City. When designing a webpage, there are many things you have to put into consideration including the dynamics of technology and customer preferences which change very often, and a person with a lot of experience can better understand these issues. You don’t have to worry about the experience because there are a number of companies that can qualify for that because the of been offering web design services for a very long time and hiring a company like Trijour will be sure way of knowing that they can help you design your webpage. In addition to working with a very experienced web design company in Kansas City you also need to work with professionals like Trijour or are very experienced, but also of knowledge on a functional website and creating traffic hence helping you using different techniques.

Many companies in Kansas City rely on web design companies to help them out and there are many that you can engage them and that is why you can find a company that is within your budget. If you consider researching more to compare the info. …