PVCs are irregular contractions that get started within the ventricles in place of the atria. The contractions generally defeat prior to the following predicted heartbeat.
کلندرها: جهت تهیهٔ ورقه‌های طویل از کائوچو و ترموپلاستیک‌ها رزین نرم شده را بین دو یا چند سیلندر عبور می‌دهند.
【図解】チェッカープレート(縞板)の曲げ加工が通常より高くなる理由とは？
اعتقاد بر این است که بیشتر محصولات وینیلی زمانی‌که به‌طور صحیح مصرف شوند عموماً بی‌ضررند هر چند تعدادی از افزودنی‌ها و نرم‌کننده‌ها از محصول وینیلی می‌توانند نشت کنند.
About 50 % of the whole world's PVC production capacity is in China, Regardless of the closure of numerous Chinese PVC plants because of concerns complying with environmental rules and very poor capacities of scale.
The molecular structure of PVC consists of a lengthy-chain polymer with repeating vinyl chloride models. Every single vinyl chloride unit includes a single carbon atom double-bonded to some chlorine atom and single-bonded to 2 hydrogen atoms.
PVC is mainly manufactured being a rigid or unplasticized polymer (RPVC) or as a flexible plastic (uPVC). Adaptable, plasticized or typical PVC is softer and more amenable to bending than uPVC due to addition of plasticizers like phthalates including diisononyl phthalate or DINP.
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کارت‌های پی‌وی‌سی جنس مقاوم و قابل انعطافی دارند و به دلیل ماندگاری زیادی که دارند می‌توانند برای چاپ کارت‌های هوشمند و کارت بانکی و اعتباری و همچنین برای چاپ کارت پرسنلی و شناسایی مورد استفاده قرار بگیرند. از دیگر مزایای کارت‌های پی‌وی‌سی می‌توان به قابلیت ضدآب بودن آن اشاره کرد که در برابر رطوبت نیز مقاوم هستند؛ و همچنین پلاستیک مورد استفاده در تولید و چاپ کارت پی‌وی‌سی امکان بازیافت و استفادهٔ دوباره را دارد و به این ترتیب با استفاده از کارت‌های پی‌وی‌سی به جای کاغذ و مقوا از آسیب به محیط زیست هم پیشگیری می‌شود.
・耐衝撃性：他の五大汎用樹脂と比べて耐衝撃性に乏しい。特に低温環境だと衝撃値が低下する。
Poly(vinyl chloride) (PVC) has long been an interesting issue for polymer science investigation. Its traits are heightened by its inherent structural faults ensuing from direct producing (by free of charge-radical polymerization), which also induce its thermal instability. A number of the elemental limiting capabilities of PVC have already been prompt for being alleviated by improved chemistry all through PVC synthesis, Along with using each inorganic and natural and organic thermal stabilizers. The characteristics, characterization, modification, recycling, and several applications of PVC are all examined In this particular paper together with the past and newest study discoveries. It's been شباك pvc suggested that a number of the basic limiting Attributes of PVC may be lessened by applying both inorganic and natural and organic thermal stabilizers along with enhanced chemistry throughout PVC manufacture.
コーティング加工は、繊維材料などに樹脂溶液を塗布して熱乾燥処理する加工方法です。
Identified during the nineteenth century, this tough substance has uncovered programs within a wide spectrum of industries as a consequence of its versatility, chemical balance, and economic effectiveness.