Archive for July, 2010

BOPP and BOPP Film Testing

BOPP testing is very important for BOPP quality control. BOPP(Biaxially Oriented Polypropylene) cigarette film, with is excellent moisture barrier property, optical performances, heat seal property as well as high heat seal strength, reasonable shrinkage rate and good stiffness, is the first choice for cigarette film. The testing items of BOPP are the judgment for BOOP film performance. In order to better control the quality of BOPP cigarette film, Labthink, integrates the testing demand and introduces the relevant BOPP cigarette film testing methods and items, so as to bring useful helps for the cigarette companies.

A. Moisture Barrier Property Testing of BOPP Cigarette Film

High moisture barrier property performance is a must for cigarette package so as to avoid deterioration caused by moisture. At present, this factor is not fully noticed by the cigarette manufacturers. Labthink PARAM TSY-T1H is developed according to ASTM E96, ISO 2528 and other standards to test moisture transmission rate for materials. The lower WVTR the better. But, higher barrier property means more costs. Therefore, the common data is less than 10g/m2.day or 5g/m2.day.

B. Thickness of BOPP

Thickness of BOPP cigarette film is the basic film performance index. Uneven thickness would influence the tensile strength and permeability as well as the following procedures. Thicker cigarette film would have better stiffness with better visual performance. But, the cost would also be great. In order to find the balanced solution, high precision thickness tester is needed. Labthink PARAM CHY-C2 is the lab thickness tester with the precision up to 0.1um. When testing thickness in different directions, deviation must be controlled within 3% usually. Meanwhile, the edge thickness of BOPP film has to be measured.

C. BOPP Cigarette Film Tensile Strength, Elongation and Elastic Modulus

Cigarette package requires high tensile strength of BOPP films, which can greatly reduce the breakage during packaging process. Generally, 140N/mm2 vertically and 200N/mm2 crosswise are required. Elongation rate is for analysis of incision easiness of films. Cigarette packaging industry is different from other industries. Higher elongation rate is not better. Max. limitations of 200% vertically and 80% crosswise can guarantee easy incision and assembling smoothness. Other industries require those two indexes. But cigarette package requires more detailed requirements on incision easiness during high speed production. Therefore, Elastic Modulus testing is also put forward. Labthink PARAM XLW(PC) Auto Tensile Tester is the professional tester for film and its tensile strength with Elastic Modulus testing. Low Elastic Modulus would lead to worse stiffness, unsuccessful production procedure and inferior incision easiness as well as package breakage and film obstruction.

Commonly, Elastic Modulus is required to be above 2000N/mm2 for cigarette film. However, when testing Elastic Modulus, testing conditions and temperature must be emphasized. Otherwise, the results will fluctuate greatly. Therefore, testing condition must be stated.

D. The Heat Seal Strength of BOPP Cigarette Film

BOPP is required to have high heat seal strength and wider heat seal scope by the cigarette industry, so as to improve packing speed and proper operation. If the heat seal temperature is higher, it would lead to wrinkle because of increased BOPP film shrinkage. Therefore, proper heat seal temperature should be chosen so as to avoid unstable heat seal, wrinkle and other phenomena. The heat seal style of BOPP cigarette film is heat-pressure seal, that is, to heat seal at certain heat seal temperature, pressure and period. The heat seal testing is to test the minimum heat seal separating force after heat sealing. It is widely applied in the cigarette industry that Labthink PARAM HST-H3 Heat Seal Tester and PARAM XLW (PC) Auto Tensile Tester are used together. The heat seal strength of cigarette is normally required to be above 2.0N/15mm. Now, with the development of cigarette packing machine, low temperature heat seal film becomes more popular, which requires the heat seal strength above 1.5N/15mm.

E. BOPP Cigarette Film Coefficient of Friction Testing

The smoothness of BOPP cigarette film is one important index for BOPP films with is the testing requirements coming along with the high speed packing.

There are four kinds of situations that need coefficient of friction testing, namely, the coefficient of friction of the film and the metal side of the machine or the transfer belt; the inside side between films; the film inner side and the cigarette outer package; and the outer film side and the outer package. Of these four coefficients of friction, the first should be low so as to better transfer the cigarette package and improve packing speed.

The inside coefficient of friction should be a bit higher than that of the outer film and the machine metal side for precise location of film and cigarette package so as to improve heat seal quality and packing effects. The coefficient of film and outer paper box should be low for smooth insertion of cigarette packages. The testing speed is 100mm/min, or 150mm/min in US Standard. Labthink PARAM MXD-02 Coefficient of Friction Tester complies with many standards including US standards and international standards, and gets wide applications. Since the reference for cigarette film coefficient of friction varies, e.g., metal panel, cigarette box, inner and outer sides of films, etc., the coefficient of friction is normally between 0.2-0.6.

F. The Heat Shrinkage Testing for BOPP Cigarette Film

BOPP film heat shrinkage is mainly used for the evaluation of heat stability under different conditions or different factors. For rigid cigarette package, such rigid package has good support effect, around which high shrinkage film can be applied so as to achieve even and beautiful visual effects. Therefore, rigid package requires the heat shrinkage of BOPP cigarette film to be up to 8% to 12%.

But, deformation cause by high shrinkage rate is a problem for ordinary flexible cigarette package. Generally, the shrinkage rate is controlled within 3%-7%. For heat shrinkage testing of BOPP cigarette film, ASTM D 2732, or GB/T 13519 is applied. Take Labthink PARAM RSY-R2 Film Free Shrink Tester as an example; mark the vertical and crosswise lines on the specimen with clear indication of direction. Put the specimen in between the frame, and immediately emerge into 120±2C constant temperature medium for 20 seconds. Then, emerge the specimen into the prepared normal temperature bath for 5 seconds, and take it out. Lay horizontally and measure the vertical and crosswise size within 30 minutes. The measurement should be with accuracy up to 1 mm. At present, some companies heats 1 minute, 5 minutes or other conditions under 120C with different testing results.

G. BOPP Cigarette Film Abrasion Resistance Testing

With stricter requirements for abrasion resistance, inferior abrasion resistance performance would greatly influence the beauty of the cigarette package. The testing of abrasion resistance is to avoid scratch on the surface of the product caused by the contact of film surface and the machine; and to avoid wounds caused by film and outer package. Labthink PARAM MCJ-01A Rub Tester can be applied for the test. Take a piece of clean offset paper of 50mm width and 80g/m2 onto the rub tester. Cut a piece of BOPP cigarette of certain size and put on the rub platform. Set the rub times and start to see the abrasion.

Above all, there are many BOPP cigarette film testing items. When testing, relevant standards must be applied; or unified testing conditions for data comparison. Labthink, is willing to have further dialogues on BOPP film and its quality with professionals of the industry.

Labthink Instruments Co., Ltd.

No. 144 Wuyingshan Road, Jinan 250031, China

Tracy Bao  info@labthink.cn

Tel: 0086 531 85061153  fax:0086 531 85812140

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How to Download Movies From Youtube

There was once one YouTube viewer named Brian who published a question on to how he can download the great movies he is watching in this website. He once said that he has been trying to download some YouTube movies but was unable to do so for some unknown reasons. The truth is there are several YouTube users who are sharing the same problem as Brian. Most of them are unaware of how to save their favorite movies on their hard drives.

Anyhow, is it really possible to download movies from YouTube? Great thing, it is. So, if you are one of these people who are tired of bookmarking the pages of your favorite YouTube movies, this is the perfect time for you to learn the ways on how to appropriately do it.

YouTube Movies and How They Work

YouTube basically uses Flash video in order to playback movies on their website. This is actually the main reason why it is harder for people to download movies from YouTube. Using a Flash from a publisher standpoint certainly makes it harder for people to enjoy the benefits of downloading these movies.

However, it is still not impossible for you to download your favorite movies because you can simply search your Temp index for the file depending on how the Flash movies are played. This is feasible because the server downloads the whole movie to your desktop computer during playback.

To spare you from exerting too much effort, it is better to find someone to do the work for you in locating the file for YouTube movies. One of the website to help you on this matter is the KeepVid, which locates downloads from a number of Internet sites.

How to Download YouTube Movies Using KeepVid

If you happen to see a YouTube video you want to keep, simply copy the URL next to the page where the video is posted. And then, paste it into the download lookup of the KeepVid. Go to the list of sites, locate for YouTube and select it. Finally, click the download button.

KeepVid will be the one to locate for the download link and give you the instructions on how to download the movie you want putting an end to all your hassles.

Since YouTube utilizes the FLV Flash format that is not instantaneously playable, you then also need an application to play it back. You may use Windows user so you can get a copy of FLV Player. This way, you can already watch the files from your desktop computer. You may also try the shareware application SWF.max, this actually displays thumbnails of the movies and includes a number of great features to give you full control on playback.

How to Download YouTube Movies for Firefox Users

If your default browser is Firefox, you can download movies from YouTube by simply installing an extension. Example of this extension is Unplug, which allows you to save both audio and video inserted on a webpage. Set up the extension and when you are already on a page where the movie you want to save is located, simply go to Tools then Unplug and you can download the movie finally.

Other Ways to Download YouTube Movies

There a lot of other option to download Youtube movies. You may want to download iTube, a freetool, and install it on your computer. Open iTube and choose File and then go to Options. And then below the Save Movies To: simply field enter the location where you want to save the YouTube movie. You can actually choose if you want to convert the file giving you more options to download it on your iPod or if you simply want to MPEG for daily use on your home computer.

If you want to download the movie to your iPod, you have to check the Import Converted Files Into iTunes option. In case you don’t have iTunes, you have to be sure that this option is unchecked. Once this is checked, the program will detect it as an error. Finally, once the download is done, simply click OK.

Afterwards, you can enter the URL of the movie right in the field of Page URL, then click Go. You will notice that the program will initialize and begin to download the movie in the hard drive of your computer. Now, once the download is over, the movie will be converted according to what you have chosen during the third step. If you are planning though to download movies right from other sites such as Metacafe or GoogleVideo, you will be in need of other handlers. In this case, you may also download your chosen handler and install when finished downloading.

Knowing More about Legal Films Download

You would be surprised to know that many of the films which are available on the Internet are currently copies which have been bootlegged or pirated. Many people are definitely not going to worry about the legal aspect of downloading such pirated copies. Nevertheless if you are really intending to go in for a films download it is necessary to go to a place where you are going to get a legal movie copy of your choice of films.
Thanks to so many P2P servers and sites out there like pirate Bay etc. it has become very easy for a person to upload and download the movies of his choice. That is the reason why whenever you go in for a search of films download you are going to be astonished at the number of websites offering you just that. Not only are all these websites quite capable of giving you pirated copies but also they are not going to take any responsibility for the quality of the movie.
So if you want to download Moerder ohne Erinnerung – The Alzheimer Case  or even download Nea – Ein Maedchen entdeckt die Liebe you would want to go to a place which can give you some really good quality material. You do not want to pirated movie copy taking up space on your hard disk would you? Besides you would not want to waste 8 to 10 hours going in for films download only to find that the downloading process stopped at 22% four hours ago. Not only has your computer stayed on for 4 hours but the frustration aspect is also going to come into it!
That is the reason why if you intend to download Moerder ohne Erinnerung – The Alzheimer Case and download Nea – Ein Maedchen entdeckt die Liebe you would want to go on a proper site which can give you full films download of your choice. So what are you waiting for? Go on to the Internet for films download and look for places where you can go in for complete films download in a systematic and methodical manner.
There are plenty of places on the Internet where you are going to get to download Moerder ohne Erinnerung – The Alzheimer Case or even download NEA – Ein Maedchen entdeckt die Liebe in a legal manner. You just need to pay a limited sum of money. And after that the movie of your choice is yours to do with as you like.

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