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    • 8. 发明授权
    • High tenacity acrylonitrile fibers and a process for production thereof
    • 高韧性丙烯腈纤维及其生产方法
    • US4861659A
    • 1989-08-29
    • US39336
    • 1987-04-17
    • Takashi TakadaKenichi HiraoHiroyoshi TanakaMitsuo Suzuki
    • Takashi TakadaKenichi HiraoHiroyoshi TanakaMitsuo Suzuki
    • C04B16/06C04B20/10C04B28/02D01F6/18
    • C04B16/0658C04B20/1029C04B28/02D01F6/18Y02W30/92Y02W30/97Y10T428/2913Y10T428/2978
    • High tenacity acrylonitrile fibers are provided.The high tenacity acrylonitrile fibers comprise acrylonitrile polymers composed mainly of acrylonitrile having an intrinsic viscosity of at least 2.5 to 3.5 and having a degree of crystalline orientation measured by wide-angle X-ray diffraction within a range of 93-97%, a tensile strength of at least 10 g/d, an initial modulus of at least 180 g/d, a knot strength of 2.2 g/d and a surface smoothness.A process for production of the high tenacity acrylonitrile fiber which comprises once extruding an acrylonitrile polymer solution having an intrinsic viscosity of 2.5 to 3.5 in air or in an inert gas through a spinning nozzle, then introducing into a coagulating bath, subjecting the resulting coagulated filaments to washing with water, drawing and drying, and then drawing the filaments under a drawing tension of about 1.0 to 2.5 g/d with dry heating at about 160.degree. to about 250.degree. C. to make the total drawing magnification about 10 or 25 times per an initial length of the coagulated filaments.
    • 提供高韧性丙烯腈纤维。 高强度丙烯腈纤维包含丙烯腈聚合物,其主要由丙烯腈组成,其特性粘度为至少2.5至3.5,并且具有通过广角X射线衍射测量的结晶取向度在93-97%范围内,拉伸强度 至少10g / d,初始模量为至少180g / d,结强度为2.2g / d和表面平滑度。 一种高强度丙烯腈纤维的制造方法,其特征在于,在空气或惰性气体中,通过纺丝喷嘴一次挤出特性粘度为2.5〜3.5的丙烯腈聚合物溶液,然后将其导入凝固浴中,使得到的凝固丝 用水洗涤,拉伸和干燥,然后在大约160℃至大约250℃下干燥加热,在约1.0至2.5g / d的拉伸张力下拉长丝,使总拉伸倍率为约10或25倍 每凝固细丝的初始长度。
    • 9. 发明授权
    • Heat exchanger
    • 热交换器
    • US4691767A
    • 1987-09-08
    • US772748
    • 1985-09-04
    • Hiroyoshi TanakaMasaaki AdachiYoshiyuki TsudaShigeo AoyamaSatoshi TannoKaoru Kato
    • Hiroyoshi TanakaMasaaki AdachiYoshiyuki TsudaShigeo AoyamaSatoshi TannoKaoru Kato
    • F28F1/32F28D1/04
    • F28F1/325Y10S165/503
    • A heat exchanger is provided in an air conditioner, refrigerator or the like, and is provided for the indirect transmission and reception of heat between fluids. The heat exchanger comprises a plurality of flat plate fins which are arranged parallel to one another at predetermined intervals so as to allow air stream to flow therebetween, and a plurality of heat transfer tubes passing through the flat plate fins for allowing a fluid to flow therethrough. Each fin is provided with a number of groups of air vents arranged to cross the wake side of the air stream. Each of the air vents is defined by a slat having four sides in which two sides, facing the air stream, are opened and other two sides are provided with leg portions for connecting the slat with the fin. The leg portions are aligned with each other and are inclined with respect to the normal line of the leading edge of the fin. With the above structure, a swirling and a turbulent component of air are induced in the air stream flowing between the fins thereby improving the heat transfer efficiency of the fins.
    • 在空调,冰箱等中设置有热交换器,用于在流体之间间接传递和接收热量。 热交换器包括多个平板翅片,它们以预定间隔彼此平行布置,以允许空气流在其间流动,并且多个传热管穿过平板翅片以允许流体流过其中 。 每个散热片配备有多组通风孔,其布置成越过空气流的尾流。 每个通风口由具有四个侧面的板条限定,其中面向空气流的两侧被打开,而另外两个侧面设置有用于将板条连接到翅片的腿部。 腿部彼此对准并且相对于翅片的前缘的法线倾斜。 利用上述结构,在翅片之间流动的空气流中引起空气的漩涡和湍流分量,从而提高翅片的传热效率。