Standard test method for water vapor transmission rate of plastic films and sheets using modulated infrared sensors The purpose of this test method is to obtain reliable values of WVTR for plastic films and sheets. WVTR is an important characteristic of packaging materials that is directly related to shelf life and stability of the packaged product. The data from this test method is suitable as a reference test method if the buyer and seller agree on sampling procedures, standardization procedures, test conditions and acceptance criteria. 1.1 This test method covers the procedures for determining the rate of water vapor passage through flexible barrier materials. The method applies to sheets and films up to 3 mm (0.1 in.) thick, consisting of single or multiple layers of synthetic or natural polymers and foils, including coated materials. It provides for the determination of ( 1 ) water vapor transmission rate (WVTR), ( 2 ) film permeability to water vapor, and ( 3 ) water vapor permeability coefficient for homogeneous materials. Note 1 - Water vapor permeability and water vapor permeability values must be used with caution. the inverse relationship between WVTR and thickness and the direct relationship between WVTR and water vapor partial pressure difference may not always be applicable. 1.2 This standard is not intended to address all safety issues, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory restrictions prior to use. GBPI's  Moisture Vapor Transmission Analyzer is used to test the water vapor transmission rate (WVTR) of films or sheet materials. It is suitable for testing the water vapor transmission performance of films, sheets, papers, packaging parts and many other materials in the fields of food, pharmaceuticals, medical devices, daily chemicals, photovoltaic electronics, etc. It is an ideal configuration instrument for off-line or on-line testing of the barrier performance of packaging materials by the majority of production units in the packaging industry. Testing principle W413 2.0 water vapor transmission rate tester adopts the principle of infrared method. The pre-treated specimen is fixed in the middle of the test chamber, and the test chamber is divided into high humidity side and low humidity side, compressed air flows on one side of the film, dry nitrogen (carrier gas) flows at a fixed speed on the other side, due to the existence of humidity gradient, water vapor will penetrate from the high humidity side to the low humidity side, the water vapor through the specimen is carried to the infrared sensor by the flow of dry nitrogen, and the water vapor transmission rate of the specimen is obtained by the electrical signal output from the sensor. Water vapor transmission rate of the specimen and other parameters. GBPI specializes in the production of package testing instruments, with many ...

Exhibition overview The K exhibition in Germany is held every three years and is timeless, and will usher in its 22nd event in 2022. The K exhibition is currently one of the largest, highest level and most professional representative plastic industry events in the world. As a world-class rubber and plastics exhibition, K exhibition is famous not only because of its large scale, but also because of its high recognition and deep influence in the world plastics industry, no matter for the entire plastics and rubber industry, or for enterprises from various application fields, Both are important industry communication platforms, bringing new business opportunities to all areas of the industry. From October 19th to 26th, Düsseldorf, Germany, GBPI will show you a series of specialized, new, special and new equipment in Hall 13, booth 13D07. GBPI Guangzhou Standard International will display its own strength, Let global customers test the scientific and technological power of Chinese enterprises! Time and location October 19 - 26, 2022 Messe Düsseldorf, Germany

In the production process of rubber, plastic and other products, in order to prolong the service life of the product and have good anti-oxidation, smoothness, flexibility and other properties, antioxidants, anti-blocking agents, plasticizers and other additives are often mixed. In addition to this, it is difficult to completely react the individual monomers used to prepare the product. Experiments have shown that these additives and residual monomers will slowly migrate outward in rubber, plastic and other products. When rubber and plastic products are in direct contact with food and medicine in packaging or other forms, these substances are likely to migrate. In food and medicine, food safety incidents such as "liquor plasticizer incident" and "toxic plastic wrap incident" are all related to the migration of harmful substances in packaging. Monitoring of Migratory Substances in Articles. Pacifiers are mostly used by infants and are in direct contact with the milk powder and oral cavity. The functional development of various organs of infants is not perfect. There are more migratory substances in the pacifier, which is more harmful to the baby. The total amount of control to ensure the safety of infant food intake. Each country has national standards, such as Thailand Thailand mandates TIS 1025-2562 (2019) as a new standard for pacifiers. This will take effect on December 13, 2021. On June 16, 2021, the Ministry of Industry of Thailand published a regulation in the Government Gazette requiring TIS 1025-2562 (2019) as a standard for pacifiers (the regulation). This industry standard is mainly based on EN 1400:2013+A1:2014 and contains requirements related to the materials, construction, performance, packaging and product information of such products. It is built with reference to information from the manufacturer, the user and the following documents: EN 1400:2013+A1:2014 "Children's use and care articles - Pacifiers for infants and young children - Safety requirements and test methods" EN 71-3:2013+A2:2017 'Safety of toys - Part 3 "Migration of certain elements" EN 12868:2017 'Children's use and care articles - Method for determination of the release of N-nitrosamines and N-nitroso substances from elastomer or rubber teats and pacifiers DIN 53160-1:2010 "Determination of colour fastness of commonly used articles - Part 1: Artificial saliva test" ISO 105-A03:1993 'Textiles - Tests for colour fastness - Part A03: Grey scales for assessing dyeing' Ministry of Health Circular (No. 369) BE 2558 (2015) Re: Bottles and Containers for Infants and Young Children. TIS 1025-2562 (2019) also requires certain nipple materials/components to comply with certain chemicals/tests involving: Migration of 17 elements Release of N-nitrosamines and N-nitroso species 2-mercaptobenzothiazole release Antioxidant release formaldehyde release Bisphenol A (BPA) release Color fastness Volatile compound content Test methods and instruments The AUTO ZF3600 total migration and ...

Circularity will be in the spotlight at K 2022, the world’s largest plastics trade show.  K SHOW 2022 The World’s No.1 Trade Fair for Plastics & Rubber Location: Germany Booth No:13D07 Time: 19-26 Oct. 2022    we look forward to seeing you there！ K is the world's largest trade fair for the plastics and rubber industry. It gathers the most important supplier of plastics and rubber machinery, raw and auxiliary materials and semi-finished products, technical parts and reinforced plastic products under one roof. It is an ideal platform to showcase products and innovations and to make business contacts. K will be followed by a special exhibition under the theme "Visions in Polymers", that presents the trends and innovations of the industry. Special consideration is given to the subjects of energy efficiency and resource conservation.