Posted by admin | Posted in Cartoon Collectables | Posted on 07-02-2008
Tags: bettyboop, illustrations, retro, sign, surf
BOPP BOPP film and testing
BOPP testing is very important to control the quality of BOPP. BOPP (biaxially oriented polypropylene) film with a cigarette excellent barrier against moisture is owned optical performance, heat seal property, high heat seal strength, the rigidity of the reasonable withdrawal rate and well, is the first choice for smoking movies. The test items are frequently stop BOPP film performance BOOP. To better control the quality of the film BOPP cigarette Labthink, integrated application testing and introduces the film of BOPP cigarette test methods and relevant articles to be useful for help cigarette makers.
A. Moisture Barrier Cigarettes Test Property BOPP film
high moisture barrier performance property is a package of cigarettes must avoid the deterioration caused by moisture. At present, this factor is not fully warned by the cigarette manufacturers. PARAM Labthink TSY-T1H is developed by ASTM E96, ISO 2528 and other rules to control the transmission rate of moisture in materials. The smaller the better WVTR. But, much higher means more cost barrier. Therefore, the data are less common or 5g/m2.day 10g/m2.day.
B. BOPP Thickness
film thickness cigarettes BOPP is the performance index of the film base. the influence of uneven thickness tensile strength and permeability and the following procedures. thick layer of cigarette have a greater rigidity to the best visual interpretation. However, the cost would be higher. To find a balanced solution, the accuracy of thickness tester is necessary. Labthink PARAM CHY-C2 Thickness Tester laboratory with an accuracy of 0.1um. When evidence of thickness in different directions, space must be controlled less than 3% for general. Meanwhile, the thickness of the edge of the BOPP film must be measured.
BOPP cigarette C. Film Module elongation at tensile strength, and elastic
cigarette packages requires a tensile strength of BOPP films, which can greatly reduce break during the packaging process. In general, the vertical and lateral 140N/mm2 200N/mm2 necessary. elongation rate is the ease for the analysis of the films of the incision. industry pack of cigarettes is different from other industries. Increasing the amount of tension is not better. Max. limits of 200% and 80% vertically transverse incision can ensure easy editing and soft. Other industries need these indices. But the package of cigarettes more detailed requirements about the ease of reduction of production at high speed. Therefore, elasticity modulus test is also highlighted. Labthink PARAM XLIV (PC) Auto Tester tensile tester is professional film and resistance to tensile modulus test. low modulus stiffness would lead to worse, the procedure fails and the lowest production facility incision broken package and obstruction and film.
In general, modulus is required to be more for cigarettes 2000N/mm2 film. But during the test module, testing temperature and conditions should be highlighted. Otherwise, the results can vary considerably. Therefore, the requirement of proof must be indicated.
D. Heat Seal Film BOPP cigarette Force
BOPP is necessary to have high resistance to heat and seal of a wider margin for heat seal the tobacco industry, to improve the speed packaging and operation. If the heat sealing temperature is higher, leading to wrinkles due to the withdrawal of more BOPP films. Therefore, good heat seal temperature must be such as to avoid the unstable heat seal, wrinkles and other phenomena. Style BOPP film for cigarette seal attached to the heat of pressure, ie, thermal heat sealing cachet a certain temperature, pressure and time. Proof hot stamping is to test the minimum closing force after-sealing. In general, apply to the cigarette industry Labthink PARAM HST-H3 Heat Seal Tester and PARAM XLIV (PC) Auto tensile tester used together. The heat seal strength of cigarettes is normally required to be above 2.0N/15mm. Now, with the development machine packing snuff, the low temperature heat seal film gets more people, which requires the sealing force 1.5N/15mm above.
E. BOPP cigarette film coefficient of friction testing
The thinness of the BOPP film smoking is an important index of BOPP films with testing requirements will come with the package at high speed.
There are four types of situations that require proof of friction, ie, the outer packaging of coefficient of friction of the film and the metal part of the machine or the transfer belt in the interior between the films, film and the inside of the cigarette and the outer side of the film and the outer carton. Among these four coefficients of friction, the former must be low for a better transfer of the packet of cigarettes and improve the speed of packing.
The internal friction coefficient should be somewhat higher than the outside of the film and the metal machine to locate Film precise package of cigarettes in order to improve the quality of heat sealing and packing effects. The coefficient of film and paper box outside must be low to facilitate the insertion of packets of cigarettes. The speed test is in 100mm/min 150mm/min or U.S. standard. Labthink PARAM MXD-Coefficient of Friction Tester complies with 02 standards including the U.S. and many international standards, and get a wider application. Since the reference to the films of cigarettes friction coefficient varies, metal panel, for example, sides of the cigarette box, interior and exterior films, etc, the coefficient of friction is usually between 0.2 to 0.6.
F. The test of thermal contraction of cigarettes BOPP film
heat removal BOPP film is primarily used for evaluation Heat stability in different conditions or different factors. For rigid cigarette packets, has a rigid package Indeed, a good support around which may be high film shrinkage applied to achieve even and very beautiful visual effects. Therefore, rigid packaging requirements of the withdrawal of the film heat BOPP cigarette to a maximum of 8% to 12%.
But the cause deformation, the withdrawal rate is high a problem for the flexible package of cigarettes regular. In general, the withdrawal rate is controlled within 3% -7%. To test the thermal shrinkage Cigarette BOPP Film, ASTM D 2732, or GB / T 13 519 applies. Take Labthink PARAM RSY-R2 Film Free Shrink Tester For example, the mark and the vertical lines through the sample with a clear indication of direction. Place the sample between the frame and immediately leave an average of 120 ± 2C constant temperature for 20 seconds. Then out of the prepared sample in the bathroom of a normal temperature for five seconds and release. Place horizontally and measure vertical and horizontal size in 30 minutes. The measure must be with an accuracy of 1 mm. Today some companies heat 1 minute, 5 minutes or other conditions 120C with the results of different tests.
G. BOPP Cigarette abrasion resistance Film tests
With more stringent requirements for abrasion resistance, resistance to abrasion than the yield would be a great influence on beauty pack of cigarettes. The test for resistance to abrasion is to avoid scratching the surface of the product caused by the contact surface of the film and the machine and avoid injuries and packaging film. ECJ-01A PARAM Labthink Rub tester can be applied to the test. Take a clean piece of paper offset 50 mm wide and 80g/m2 the rub tester. Cut a piece of BOPP cigarette a certain size and placed on the platform of rubbing. Set the brush and begin to see abrasion.
Above all, there are many items of BOPP cigarette film test. During the test, the relevant standards should be applied, or unified test conditions for comparison of data. Labthink is willing to talk more about the BOPP film and its quality with industry professionals.
Labthink Instruments Co., Ltd.
No. 144 Wuyingshan Road, Jinan 250 031, China
Bao Tracy info@labthink.cn
Tel: 0086 531 85061153 Fax: 0086 531 85812140
About the Author
Labthink, the excellent provider of testing instruments and testing services, is devoted to provide most excellent and complete quality control solutions for pharmaceutical, foodstuff, cosmetics, packaging, printing, adhesive, automotive, petrochemistry, environment, biology, new energy, construction, aviation and electronic industries worldwide.
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