摘要:
A shingle having a headlap section and a buttlap section with at least one portion of the buttlap section having a relatively uniform color and another portion of the buttlap section having a color gradient or gradation from light to dark. An illusion of depth or thickness is created on the portion of the buttlap section having the color gradient. The buttlap section defines in part the exposed weather surface of the associated shingle. The relatively uniform color portions may be formed on tabs or dragon teeth and the color gradient formed on a backer sheet disposed beneath the tabs. Openings between adjacent tabs expose the color gradient to view. A plurality of horizontal striations may be used to establish the desired color gradient from light to dark. The amount of tone and contrast may be selected to create the desired illusion of depth or thickness. The amount of contrast may be varied depending upon the color selected for each shingle. The number of horizontal striations and their width may also be varied to provide the desired color gradient.
摘要:
The invention relates to an abrasive article comprising:(a) a plurality of abrasive grains; and(b) at least one binder for the abrasive grains,wherein the binder comprises a cured epoxy resin containing a polycyclic aryl, polycyclic alkyl, or cycloalkyl structure. The abrasive articles can comprise bonded, non-woven or coated abrasive articles.
摘要:
A thermosettable resin composition having a viscosity that decreases during processing temperatures and increases as the temperature is raised to curing temperatures is provided. The composition comprises thermosettable resins and thermoplastic particles that are insoluble in the thermosettable resins at processing temperatures but soluble in the thermosettable resins at curing temperatures. Prepregs prepared from the thermosettable resin composition are also provided.
摘要:
A thermosettable resin composition having a viscosity that decreases during processing temperatures and increases as the temperature is raised to curing temperatures is provided The composition comprises thermosettable resins and thermoplastic particles that are insoluble in the thermosettable resins at processing temperatures but soluble in the thermosettable resins at curing temperatures. Prepregs prepared from the thermosettable resin composition are also provided.
摘要:
Panels of composite wood material are formed in a wet process which includes depositing a layer of wet composite wood material in a mat on a press wire screen mesh and moving the screen mesh to carry the mat into a pressing position between a pair of spaced apart pressure plates having generally matching, contoured facing surfaces for shaping the outer face and a smoothly contoured back face of the panel. The back face of the panel is not flat and generally follows or matches the shape or contour of the outer face so that regions of high fiber stress and dense, brittle areas of high fiber compression are generally eliminated. The resulting finished panels having excellent machining qualities, more uniform surface coating absorption characteristics, more uniform thickness and less rapid moisture absorption properties, along with a lower tendency to check, crack or split.
摘要:
A solventless, fluid epoxy resin composition is storage-stable against separation of phases for at least one year, and when cured provides adhesive bonds of improved peel strength at room and low temperatures without loss of lap shear strength at room and elevated temperatures. The composition comprises an epoxide group-containing compound having in situ polymerized, elastomeric particles colloidally dispersed therein, and as curing agent a poly(oxyhydrocarbolene)diamine compound and optionally, and preferably, a cure accelerator.
摘要:
Polymers containing recurring 2,5-oxolanylene units wherein at least 60 percent of the units are joined directly to one another so as to provide segments consisting of at least 6 of said units.
摘要:
A method of making a mixture of sensing material for a halogen vapor sensor characterized by providing granular activated Alumina (Al.sub.2 O.sub.3) and firing it in a sensitizing material, in the class of alkali metals including carbonates of sodium, lithium, potassium, cesium and rubidium, under controlled temperature conditions for a predetermined time to distribute the sensitizing metal throughout the interstices of the Alumina.
摘要翻译:制备用于卤素蒸气传感器的感测材料的混合物的方法,其特征在于提供颗粒活性氧化铝(Al 2 O 3),并将其在包括钠,锂,钾,铯和铷的碳酸盐的碱金属类的敏化材料中焙烧, 在控制的温度条件下预定的时间将致敏金属分布在氧化铝的整个空隙中。
摘要:
A multifunctional optical film for enhancing light extraction includes a flexible substrate, a structured layer having nanoparticles of different sizes, and a backfill layer. The structured layer effectively uses microreplicated diffractive or scattering nanostructures located near enough to the light generation region to enable extraction of an evanescent wave from an organic light emitting diode (OLED) device. The backfill layer has a material having an index of refraction different from the index of refraction of the structured layer. The backfill layer also provides a planarizing layer over the structured layer in order to conform the light extraction film to a layer of an OLED display device. The film may have additional layers added to or incorporated within it to an emissive surface in order to effect additional functionalities beyond improvement of light extraction efficiency.