Description: The most important properties of this thermoplastic gained of cyclohexylendimethylenediole, ethyleneglycole and therephthalic acid are: hardness, an enourmous impact-strength and resistance to chemical substances,
Description: Thermoplastic fluorocopolymer consisting of vinylfluoride and tetrafluoroethylene. Formula: Category:Thermoplastic
Title: Testing of plastics and elastomer films, paper, board and other sheet materials – Determination of water vapour transmission – Part 1: Gravimetric method Category:Water
Title: Non-destructive testing – Leak test – Calibration of gaseous reference leaks; German version EN 13192:2001 Category: Leak Testing Please note: Complete standard sheets are
Description: Perfluorinated elastomers (FFKM’s) are elastic sealing-materials with a natural rest capacitiy, as well as good adaptation-properties to seal surfaces with equal chemical resistance to
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Description: Polymer blend of actually immiscible polymers, whereby miscibility was reached during the blending process. (Cf. Polymer blend) Category:Definition
Description: Testing fuel for determining permeation and resistance properties in general. Composition: 84,5 Vol.% FAM A 15 Vol.% Methyl alcohol 0,5 Vol.% Water Category: Testing
Description: Determining resistance of protective clothings to permeation of sodium chloride with continuous or discontinuous contact and for determining the time lag. Result Unit: Permeation
Title: Standard Specification for Reinforced Epoxy Resin Gas Pressure Pipe and Fittings Category: Thermoset Please note: Complete standard sheets are made available by Beuth Verlag.
Title: Testing of taste transfer from packages and packaging materials through the head space using water as the test medium Category: Sensory Analysis Please note:
Title: Standard Practice for Use of Test Methods E 96 for Determining the Water Vapor Transmission (WVT) of Exterior Insulation and Finish Systems (EIFS) Category:
Title: Standard Practice for Evaluation of Hydrogen Uptake, Permeation, and Transport in Metals by an Electrochemical Techniquen Category: Hydrogen Permeation Please note: Complete standard sheets
Description: The most useful properties of the fluoroploymeres are due to the fluorineatoms, which can be found in the polymerchain. Fluorine is the most electronegative
Description: Produced by radical polymerisation of acrylic amide in aqueous solution, poly-acrylic-acid-amide can be obtained as a white, odorless powder. It is well soluble in
Title: Windows and door height windows; Air permeability test Category: Building Materials and Products Related standards: ISO 9237, ISO 7231, ISO 8272, ISO 4638, ISO
Descpription: Energy needed by a system to initiate a particular process, such as diffusion or a chemical reaction. It can be described using the Arrhenius
Description: Half crystalline, whitish, half transparent functional thermoplastic with properties similar to those of low-density-PE (LDPE, soft PE). In contrast to LDPE, HDPE is significatnly
Description: A widespread family of rubber-like materials that – in contrast to common vulcanised rubbers – can be processed and recycled just as thermoplastics. Usage:
Description: Produced by adding the acetyl radical of the acetic acid to cellulose (available as cotton- or wood-fibers). The result is a robust plastic
Description: Amourphos, transparent and colorless high-perfomance thermoplastic which is both hard and rigid but also refractory and notch-sensitive. PMMA features a good resistance to grinding
Description: Acrylic-modified, transparent and highly weather-resistant rubber thermoplastic with good chemical stability, resilience and stiffness; features antistatic properties. Usage: Building and recreational application, vehicle construction
Description: The American guideline ASTM D1418 (American Society for Testing and Materials) categorizes the fluoroelastomers into three subgroups: FKM (fluorocarbon elastomer) FFKM (perfluorinated elastomers) FVMQ
Description: Also called “phenol resins”; phenol plastics have been the first fully synthetically produced plastics. They are duroplasts made up by polycondensation. They feature high
Description: PPS is a highly crystalline, linear structured thermoplastic composed of alternating sulfur atoms and phenylene rings in a para substitution pattern. This means that
Title:Standard Guide for Selection of Chemicals to Evaluate Protective Clothing Materials Category: Protective Clothing Please note: Complete standard sheets are made available by Beuth Verlag.
Characteristics: (Standard: bore 10 mm), PTFE Description: 2 x 1m Teflon® tube
Title: Standard Practice for Chemical Permeation through Protective Clothing Materials: Testing Data Analysis by Use of a Computer Program Category: Protective Clothing Please note: Complete
Description: HDPE shows no or little branchings, so that the molecules are densely packed. In consequence, the resulting polymer features a rigid structure. Usage: bottles
Description: PTFE (also called “Teflon”) is a non-inflammable plastic that is completely insoluble and inswellable within any type of solvent. It is resistant to all
Description: Plastic which can be transformed into a hard, vitually unmeltable and insoluble product by heating or using other methods. The term “thermoset” comprises both
Description: TFE/PDD is a thermoplastic, amorphous fluorocopolymer, which is also known under the name TEFLON®AF by DuPont. TFE/PDD is a copolymer consists of tetrafluoroethylene (TFE)
Description: TFE/PVS is modified PTFE and was produced first-time by DuPont. It is a thermoplastic fluoropolymer, which consists of tetrafluoroethylene (TFE) and perfluorovinylsulfonicacid. TFE/PVS was
Description: Ultra- and very low density polyethylene are linear structured polyethylenes with a density lower than 0,880g per inch. These semi-crystalline (i.e. normally 50% crystalline),
Description: Measurement cell for pipes and tubing. The specimen seperates inner and outer media (liquid or gas). Not pressure-resistant, appropriate for rough vacuum The Measurement
Title: Gas analysis – Preparation of calibration gas mixtures using dynamic volumetric methods – Part 10: Permeation method (ISO 6145-10:2002); German version EN ISO 6145-10:2008
Title: Non-destructive testing – Terminology – Part 8: Terms used in leak tightness testing; Trilingual version EN 1330-8:1998 Category: Definition Please note: Complete standard sheets
Description: Determining resistance of protective clothings to permeation of hydrogen sulfide with continuous or discontinuous contact and for determining the time lag. Result Unit: Permeation
Description: Thermoplastic fluorocopolymer constisting of vinylidenefluoride and trifluoroethylene Formula: Category:Thermoplastic
From 1.1.2019 the house number of Mecadi GmbH has been changed from 9 to 145. We are at the same place, the change is initiated
Title:Testing of plastics – Determination of gas transmissionsrate – Part 1: Volumetrical method for testing of plastic films Category: Plastics Please note: Complete standard sheets
Description: Testing method for determining nitrogen transmission rate through flat plastic materials like films, sheetings, laminates, co-extruded or coated materials under a differential pressure. Result
Description: The alloy of gases that is fed as test gas into one half of the permeation measuring cell is called “feed”. Category:Definition
Title: Non-destructive testing – Leak testing – Bubble emission techniques; German version EN 1593:1999 Please note: Appendix ZA deleted without replacement Category: Leak Testing Please
Description: Butyl-rubber only features moderate mechanical qualities and has a high inner absorbability. In contrast to that, it features a good resistance to weather and
Characteristics: heat resistant up to 150 ° C(depends on media and pressure) Description: 2x perforated cap and sealing with gauntlet for tube (diameter 32mm)
Descpription: Amorphous, transparent, light-amber-colored high-performance thermoplastic. PESU features a little resistance to pressure and has a tendency towards forming stress cracks. Its resistance to thermal
Title:Standard Test Method for Resistance of Chemical Protective Clothing Materials to Liquid Permeation – Permeation Cup Method Category: Protective Clothing Please note: Complete standard sheets
Title: Non-destructive testing – Leak test – Pressure change method; German version EN 13184:2001 Please note:Appendix ZA deleted without replacement Category: Leak Testing Please note:
Description: Thermoplastic of milky white color that feels like wax. Because of its special properties, this material has a unique position compared to other thermoplastics.View
Description: PCTFE is made from chlorotrifluoroethylene by suspension-polymerization or by emulsion-polymerization with a redox-indicator or a peroxide as starting reagent. PCTFE is a semi-crystalline thermoplastic.
Description: POM is produced in both variants the homopolymer as well as the copolymer. Both types are hard, impact resisting and rigid polymers with an
Title: Textiles; physiological effects; measurement of thermal and water-vapour resistance under steady-state conditions (sweating guarded-hotplate test) (ISO 11092:1993); German version EN 31092:1993 Category: Textiles Please
Description: An appropriate way of drying gases is to dry them dynamically. Gases with a very high humidity are pre-dried using high-capacity drying agents. Category:Definition
Description: PFA is a semi-crystalline, perfluorinated copolymer, which consists of tetrafluoroethylene (TFE) and perfluoropropylvinylether. Due to the high fluorine fraction in the copolymer, PFA has
Description: Foaming agent is n-pentane. For other details on polysterene see the respective link (polystyrene, PS). Category:Thermoplastic
Description: PBI does not melt and is non-inflammable; it retains its fabric integrity and lissomeness even when having direct contact with flames. Usage: High-performance
Leak location, leak testing and permeation measurement on fuel systems with hydrogen trace gas More (PDF)
Descpription: COC are polymers composed of ethylene and norbornene-groups. The norbornene is randomly spread throughout the polymer backbone. Category:Copolymer Formula:
Title: Standard Test Method for Resistance of Materials Used in Protective Clothing to Penetration by Liquids Category: Protective Clothing Please note: Complete standard sheets are
Description: PPZ is an example of a new class of polymeric materials involving inorganic chains. Its main characteristics are fire resistance, good weatherability as well
Description: Universal testing method applicable to nearly all gases for the determination of gas transmission rate through rubber and elastomer depending on temperature and testing
The article language is german. Please contact for information in Englisch. Permeation of methane through equipment in biogas plants is discussed. German publication in Chemie&More.
Description: Also called “MIL-C-7024D”. Testing fuel for determining permeation and resistance properties in general. Composition: up to 90% (by weight) C10-C15 Isoalkanes Depending on amount
Title: Determination of protective material resistance to permeation by chemicals – Part 2: permeation by gaseous chemical under conditions of continuous contact Category: Protective Clothing
Description: ASTM = American Society for Testing and Materials Standard development organisation, providing international standards for materials, products, systems, and services. Category:Definition
Title: Plastics – Film and sheeting – Determination of gas transmission rate – Part 2: Equal-pressure method Category: Plastics Related standards: ISO 2782-2 Please
Title: Textiles – Measurement of water vapour permeability of textiles for the purpose of quality control Please note: q. v. ISO 15496 Technical Corrigendum 1:2006-02
Title: Standard Test Method for Rubber Property – Vapor Transmission of Volatile Liquids Category:Elastomer Please note: Complete standard sheets are made available by Beuth Verlag.
Beschreibung: PUR is produced by polyaddition out of a homogene mixture of polyols and diisocyanate. There are different types with either rigid, cross-linked or solid
Usage: This halobutyl rubber is used for articles needing low permeability to gases and liquids, e.g. tire inner liners, hoses, certain types of seals, membranes
Please contact us for further information. Calculation model, life expectancy
Title: Standard Test Method for Water Vapor Transmission of Pressure-Sensitive Tapes Category: Adhesives & Sealants Please note: Complete standard sheets are made available by Beuth
Description: Fluorocarbon elastomers are highly fluorinated, carbon based polymers, which resist to chemical attacks and ozone. The service temperature lies between –20°C and 204°C, temporary
Description: Amorphous thermoplastic based on therephtalic acid, phthalic acid and bisphenole A groups implemented in the polymer chain; PAR is a weather resistant, partly aromatic
Description: PS consists of polymerised styrene monomers with or without functional groups. It is strong, rigid, refractory and very notch-sensitive polymer that features an excellent
Title: Standard Test Method for Nondestructive Detection of Leaks in Packages by Vacuum Decay Method Category:Plastic Film and Packaging Please note: Complete standard sheets are
Description: Barrier Packaging is a packaging with very low permeability for possibly interfering materials (e.g. air). Popular applications e.g. are packagings for food (in order
Title: Standard Guide for Intercomparing Permeation Tubes to Establish Traceability Category: Preparation of Calibration Gas Please note: Complete standard sheets are made available by Beuth
Description: Permeation measuring means the process of determining the permeation rate of a certain substance. That means measuring, how much of the permeate per time
Title: Standard Test Methods for Water Vapor Transmission of Materials Category: Water Vapor Permeability Related standard: DIN EN 1931, DIN EN 12086, DIN EN ISO
