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Polyurethane (pu)
| Fiber Optic Glossary |
A thermoplastic material used in cable jackets derived from the polymerization of ethylene gas. basically, they are pure hydrocarbon resins with excellent dielectric properties
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Polyurethane, английский
- [oconhrnhcoor`]n
- Полиуретан
- Man-made synthetic foam used for filling and for cushions. rigid polyurethane
- A synthetic chemical compound used to make foam coatings, composites, and cushions.
- Синтетическое химическое соединение, используемое для изготовления вспененных покрытий, композитов и подушек.
Polyurethane fiber, английский
- A lightweight, durable, elastomeric filament composed of at least 85% of a segmented polyurethane. also known as spandex.
- Легкая, прочная эластомерная нить, состоящая не менее чем на 85% из сегментированного полиуретана. также известен как спандекс.
- Spandex fiber
Polyurethane finish, английский
An exceptionally hard and wear-resistant paint or varnish made by the reaction of polyols with a multifunctional isocyanate.
Polyurethane foam, английский
A thermoplastic cellular material especially used for thermal insulation in buildings.
Polyurethane foam sponge, английский
Thermoplastic, английский
- A plastic material that repeatedly softens when heated and hardens when cooled.
- A classification of resin that can be readily softened and reformed by heating and be rehardened by cooling.
- A material that will soften, flow, or distort appreciably when subject to sufficient heat and pressure, i.e., pvc or pe
- (1) capable of being repeatedly softened by heat and hardened by cooling
- A material which becomes soft and pliable when heated (without change in its other properties) and hard and rigid when cooled again.
- Термопласт, термопластичная пластмасса
- A term used to describe a plastic material that is permanently fusible, i.e. manufactured fibers that will soften at higher temperatures.
- A term used to describe a plastic material that is permanently fusible. the term as applied to manufactured fibers describes their tendency to soften at higher temperatures.
Polymerization, английский
- The chemical combination of similar-type molecules to form larger molecules.
- A chemical reaction in which the molecules
- A chemical reaction in which the molecular weight of the molecules formed is a multiple of that of the original substances. polymer-modified stucco a stucco containing a small amount of acrylic resin to increase its workability.
- A chemical reaction wherein small molecules combine to form much larger molecules. (also see addition polymerization and condensation polymerization.)
- The chemical reaction in which a monomer combines with itself to form a long-chained molecule called a polymer.
- The chemical combination and recombination of the same unsaturated hydrocarbon with itself to form an extensive chain; the chemical process of combining similar molecules to form larger molecules.
Hydrocarbon, английский
- Углеводород
- Углеводород. органическое соединение, содержащее только углерод и водород. атомы углерода могут быть соединены либо в незамкнутую цепь, простую или разветвленную (см. alkane; alkene — алкан; алкен), либо в замкнутые кольца. существует два типа углеводородов с замкнутой цепью: алициклические соединения, которые состоят из трех или более углеродных атомов, соединенных в замкнутое кольцо, и свойства которых аналогичны свойствам соединений такой же молекулярной массы, но с незамкнутой цепью, и ароматические соединения. основой молекулярной структуры ароматических соединений является бензол, простейшее соединение этого ряда, который содержит шесть атомов углерода, соединенных тремя простыми и тремя двойными углерод-углеродными связями. если такие соединения содержат два и более ароматических кольца, они называются полицикличе-гкими; используется также термин «многоядерные» (например, многоядерный ароматический углеводород); общепринятое сокращение полициклических ароматических углеводородов — пау. основными компонентами бензина и других нефтепродуктов являются углеводороды с открытой цепью. эти соединения не считаются опасными для здоровья, даже при тех концентрациях, в которых они присутствуют в городском 74
- Углеводороду.
- Chemical compound that contains only, or principally, carbon and hydrogen. the principal constituent of liquid fossil fuels.
- A compound of hydrogen and carbon of which petroleum products are typically examples. petroleum oils are generally grouped into two parts: naphthenics possess a high proportion of unsaturated cyclic molecules; paraffinics possess a low proportion of unsaturated cyclic molecules.
- A compound composed of carbon and hydrogen, the basic element of countless organic compounds and the principal constituents of petroleum. hydrocarbons in petroleum fall into three basic categories: the straight-chain paraffins (aliphatic); the cyclic (ring) chain (naphthenic) and the cyclic chain (aromatic).
Dielectric, английский
- An insulating (non-conductive) material. found between the inner core and outer shield of a co-axial cable.
- Материал, не проводящий электрический ток. используется для изготовления оптоволоконных кабелей, не подвергается воздействию электрических и электромагнитных полей (в том числе и полей большой мощности)
- A nonconductor of direct electric current.
- An insulating (nonconductive) material.
- A non-conductive insulator material between the center conductor and shield of coaxial cable. the dielectric constant determines the propagation velocity.
- A material that acts as an insulator.
Properties, английский
- A dockable window that displays the properties that are set on the selected object. in most cases, the property values can be edited in the window.
- A ui element that users can click to display information about a selected object.
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Breakout cable, английский
- A tight buffered cable with 900-micron coated fibers and aramid yarn surrounding each fiber. jumper cordage is a breakout structure. available in simplex and duplex variations for jumpers and in large fiber counts. normally used for indoor installations and for tactical cables
- A type of fiber optic cable containing several fibers, each with its own jacket and all of them surrounded by one common jacket. breakout cables are designed for convenient installation of fiber optic connectors but tend to have high transmission losses due to bends in the fibers.
- Кабельный отвод
Impact resistance, английский
- A test that determines the ability of fiber optic cables and cable assemblies to withstand repeated impact loads. it measures the number of broken fibers, damage to the outer sheath, and any change in the optical transmittance or attenuation. specified in the tia/eia 455-25 “repeated impact testing of fiber optic cables and cable assemblies” fiber optic test procedure
- The measured ability of material or lens to sustain dynamically applied external forces without breaking.
- The resistance of surface (or a material or product) to a shock, such as a hard blow. impact strength, impact energy the amount of energy required to fracture a material; a measure of the material’s resistance to mechanical shock.
- 1. the resistance of a material to fracture by a blow, expressed in terms of the amount of energy absorbed before fracture. 2. in yarn or cord, the ability to withstand instantaneous or rapid rate of loading.
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