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Adhesion (from Latin adhaesio – “sticking”) – the ability of one material to adhere to another under various mechanical and climatic influences. Example: paint to steel, adhesive to plastic.
Block copolymer – a polymer containing alternating polymer blocks of different compositions or structures, chemically bonded together.
Vulcanization – the process of applying a vulcanizing agent to rubber, which crosslinks its molecules into a single three-dimensional network.
Compound – a composition of thermoplastic polymer resin and elastomeric materials, with or without fillers and additives.
PVC plasticizer – a previous-generation material, modified polyvinyl chloride.
Advantages: low cost compared to other types of seals, weldability at the profile corners, low flammability, wide range of colors.
Disadvantages: hardens at sub-zero temperatures, softens at high temperatures, low elasticity and UV resistance, poor mechanical strength and weather resistance, hard corners when welded, difficult replacement at welded joints.
Polymer (from Greek polys – numerous, and meros – part) – a substance whose molecules consist of a large number of repeating structural units.
Rubber (from Latin resina – “resin”) – a class of polymer compounds. It is an elastic material obtained by vulcanizing natural rubber, widely used in tires, seals, hoses, conveyor belts, medical, household, and hygiene products.
EPDM rubber – an elastic material obtained by vulcanizing a copolymer of ethylene and a diene monomer (ethylene-propylene-diene elastomer).
Coextrusion – a method of producing seals with different hardness levels in different sections of the profile. These sections are often distinguished by different colors.
Thermoplastics – materials that can be repeatedly melted when heated.
Thermoplastic elastomer (TPE-S, SEBS-based) – a latest-generation polymer that combines rubber-like properties at normal temperatures with thermoplastic processability at elevated temperatures. The rubber phase is based on styrene-ethylene-butylene-styrene (SEBS). Unlike rubbers, TPE-S requires no chemical vulcanization, making it environmentally friendly and suitable not only for window seals but also for food and medical applications.
Frame seal – a seal installed on the fixed (stationary) part of a window or aluminum structure.
Sash seal – a seal installed on the movable (opening) part of a window.
Underglass seal – a seal located beneath the glazing unit and therefore invisible to the window owner.
Standard Prof® SEBS seals – seals for plastic windows and aluminum profiles, pre-treated with silicone grease, which doubles installation speed in profiles.
Note: The Standard Prof Factory ("VR-Plast", LLC) manufactures seals exclusively from SEBS (TPE-S). The abbreviation TPE in the company’s materials refers to SEBS (TPE-S). The company holds an Invention Patent No. 2556638 (June 19, 2013) for its proprietary SEBS (TPE-S) formulation, enabling production in compliance with GOST 30778-2001 “Elastomeric sealing gaskets for window and door units.”
