Controlling of the Waterproofness for Coffee Powder Package
Coffee powder is one kind of common instant drink, the package of which should have a very good waterproofness. The testing method of the waterproofness of the aluminized composite package for coffee powder can be used for the manufacturers to control the waterproofness of the coffee package.
Jinan, China, August 26, 2015 (Newswire.com) - Coffee is one of the three main drinks in the world, which originated from Ethiopia and featured with multiple functionalities such as refreshing and driving sleepiness. Coffee is more and more popular among the public and even coffee culture has become one part of the modern life.
Coffee is mainly packaged in three kinds of packages i.e. glass bottles, metal cans and flexible plastic bags. All of the packages should have good waterproofness. The coffee is liable to absorb moisture in a high humidity environment, which will influence its taste and cause caking of the coffee. Moreover the coffee may become deteriorated because of the moisture and the shelf life may be reduced. Therefore good waterproofness is an essential property for the coffee package.
Test Method
The waterproofness of the packaging material is evaluated by its water vapor transmission rate. Currently there are mainly four test methods for water vapor transmission rate test i.e. gravimetric method (GB 1037-1998, GB/T 16928-1997), electrolytic detection sensor method (GB/T 21529-2008), infrared detection sensor method (GB/T 26253-2010) and humidity detection sensor method (GB/T 30412-2013). Electrolytic detection sensor method and infrared detection sensor method are usually used for package tests.
in three kinds of packages i.e. glass bottles, metal cans and flexible plastic bags. All of the packages should have good waterproofness. The coffee is liable to absorb moisture in a high humidity environment, which will influence its taste and cause caking of the coffee. Moreover the coffee may become deteriorated because of the moisture and the shelf life may be reduced. Therefore good waterproofness is an essential property for the coffee package.
Test Principle
Under a certain test temperature, a constant humidity difference is generated between two sides of the test specimen. The water vapor permeates through the specimen and into the dry side. By measuring the weight changes of the test dish in different time, water vapor transmission rate and other parameters can be obtained.
and cause caking of the coffee. Moreover the coffee may become deteriorated because of the moisture and the shelf life may be reduced. Therefore good waterproofness is an essential property for the coffee package.
Test Equipment
The packaging materials used for coffee package should be of good waterproofness so that the coffee will not absorb moisture and become caking or even get deteriorate within its shelf life. The aluminized composite film obtained from one brand coffee package was tested with W3/030 Water Vapor Transmission Rate Tester, which was easy to operate and complete the tests in a high efficiency. The human factor was minimized in testing process and the test accuracy can be guaranteed. W3/030 is one WVTR testing instrument that can be used to test and monitor the waterproofness of the flexible plastic packaging materials.
Labthink Instruments Co., Ltd provides customers with advanced and sophisticated high technology packaging testing instruments as well as comprehensive, accurate and prompt testing service. The testing instruments developed by Labthink covers many industries including food, pharmaceutical, medical apparatus, healthy products, chemicals, automobile, printing and daily chemicals, etc. Please visit the website on www.labthink.com to know more about Labthink Instruments Co., Ltd.
