翻訳と辞書 Words near each other ・ Purseni ・ Purple-breasted ・ Purple-breasted cotinga ・ Purple-breasted sunbird ・ Purple-chested hummingbird ・ Purple-collared woodstar ・ Purple-crested turaco ・ Purple-crowned fairy ・ Purple-crowned fairywren ・ Purple-crowned lorikeet ・ Purple-crowned plovercrest ・ Purple-edged copper ・ Purple-faced langur ・ Purple-gaped honeyeater ・ Purple-headed starling ・ Purple-K ・ Purple-lined wrasse ・ Purple-naped ・ Purple-naped lory ・ Purple-naped sunbird ・ Purple-necked rock-wallaby ・ Purple-rumped sunbird ・ Purple-shot copper ・ Purple-tailed imperial pigeon ・ Purple-throated carib ・ Purple-throated cotinga ・ Purple-throated cuckooshrike ・ Purple-throated euphonia ・ Purple-throated fruitcrow ・ Purple-throated mountaingem Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Purple-K ： ウィキペディア英語版 Purple-K Purple-K, also known as PKP, is a dry-chemical fire suppression agent used in some dry chemical fire extinguishers.〔Glenn Corbett (ed.), ''Fire Engineering's Handbook for Firefighter I and II'' Penn Well 2009, ISBN 1593701357 page 98 〕 It is the second most effective dry chemical in fighting class B (flammable liquid) fires after Monnex (potassium allophanate), and can be used against some energized electrical equipment fires (USA class C fires). It has about 4–5 times more effectiveness against class B fires than carbon dioxide, and more than twice that of sodium bicarbonate. Some fire extinguishers are capable of operation in temperatures down to −54 °C or up to +49 °C. Dry chemical works by directly inhibiting the chemical chain reaction which forms one of the four sides of the fire tetrahedron (Heat + Oxygen + Fuel + Chemical Chain Reaction = Fire). To a much smaller degree it also has a smothering effect —by excluding oxygen from the fire. "Dry chemical" extinguishers, such as Purple-K, are different from "dry powder" extinguishers that are used to fight Class D flammable metal fires. ==Characteristics== Purple-K powder has an acrid taste and odor, is free-flowing, floating on most liquids, non-abrasive, does not wet with water and is compatible with most foam concentrates. It has violet color, to distinguish it from other dry agents. Its principal component is potassium bicarbonate (78–82% by weight), with addition of sodium bicarbonate (12–15%), mica (1–3%), Fuller's earth (1–3%), amorphous silica (0.2–%), and is made hydrophobic by methyl hydrogen polysiloxane (0.2–1%). Purple-K is normally non-toxic, but ingestion of large amount can cause alkalosis. In high temperatures it decomposes to carbon dioxide and potassium oxide, which is toxic and highly corrosive. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Purple-K」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.