34 results about "Kinetic coefficient" patented technology

The present techniques provide multi-layer plastic structures and methods for making such. The multi-layer plastic structures include an inner surface made from a polyolefin resin, and resistant to environmental stress cracking, and an outer surface that includes a styrenic copolymer. The outer surface has a kinetic coefficient of friction with itself of 0.42 and a static coefficient of friction with itself of 0.44.

Provided are SiC-C / C composite materials which have such characteristics as a suitable kinetic coefficient of friction a corrosion resistance in strongly oxidizing and corrosive environment, a creep resistance, and a spalling resistance, a high hardness, and are hardly oxidized or abraded even when exposed to high temperatures with keeping the excellent impact resistance and light weight of the C / C composites. Furthermore, molten metal pumps are provided from which components do not dissolve into the molten metal even when used in molten metal and have sufficient thermal impact resistance and oxidation resistance. The SiC-C / C composite materials can be produced by a method comprising a step of heating a C / C composite and metallic silicon at high temperatures under reduced pressure with flowing an inert gas to grow silicon carbide and simultaneously filling metallic silicon into the remaining pores, a step of increasing the furnace inner pressure to about 1 atm. with or without cooling the furnace and further raising the furnace inner temperature to diffuse the produced silicon carbide or metallic silicon used for filling the pores into the C / C composite comprising carbon fibers and carbon component other than the carbon fibers from the matrix to react with these carbons, and at least the portions of the molten metal pumps contacting with molten metal are made of the SiC-C / C composite materials.

Compositions, methods, apparatuses, kits, and combinations are described for permanently or temporarily re-designing, decorating, and / or re-coloring a surface. In one embodiment, a stencil is provided that has an embossed top layer and a low-slip bottom layer that has a static coefficient of friction between about 0.2 to about 1.2 and / or a kinetic coefficient of friction that is between about 0.1 to about 1.1 as measured against another surface having the same bottom surface as the stencil. Compositions useful in the present disclosure include a décor product that is formulated to be applied and affixed to a surface. If desired, the décor product may be substantially removed from the surface before being affixed thereto. If a user desires to remove the décor product, the décor product is formulated to be removed by a number of methods including, for example, vacuuming, wet extraction, chemical application, and the like. If the user desires to affix the décor product to the surface in a permanent or semi-permanent manner, the décor product may be affixed to the surface by applying energy thereto in the form of, for example, heat, pressure, emitted waves, an emitted electrical field, a magnetic field, and / or a chemical. The décor product may also be utilized in the form of a kit or in conjunction with a design device, such as a stencil, to control the application of the décor product to create, for example, a pattern on the surface.

The apparatus for determining coefficients of friction collects data required for determining static and dynamic coefficients of friction between various materials. The apparatus includes a ramp with adjustable slope and a plurality of test masses for placement on the ramp. Upslope lights and sensors, downslope lights and sensors, and a digital angle meter are installed on the ramp. The apparatus has a timing device having a display to show the elapsed time between a test mass passing the upslope sensor and the downslope sensor. The operator can determine the static coefficient of fraction from the tangent of the angle displayed on the digital angle meter when a test mass first begins to slide, and can compute the kinetic coefficient of friction from the angle displayed on the digital angle meter and the elapsed time shown on the timing device.

The present invention is to provide a toner which is able to inhibit the occurrence of fog, which is excellent in intermittent endurance, and which is excellent in followability during toner transfer and is thus excellent in top edge part uniformity in solid pattern printing. Disclosed is a toner for developing electrostatic images, comprising colored resin particles containing a binder resin, a colorant and a release agent, and an external additive, wherein static and kinetic friction coefficients obtained by measuring, using a 3-mm-diameter stainless-steel ball as a contactor, a 55-mm-diameter disk-shaped pellet obtained by pressing 4 g of the toner at 9 MPa for one minute, are 0.220 to 0.320 and 0.190 to 0.270, respectively, and a difference calculated by subtracting the kinetic friction coefficient from the static friction coefficient is 0.010 to 0.090.

A method of forming and the resulting membrane composition for securement to a patient's bone or tissue to reduce the formation of tissue adhesions following a surgical procedure comprises a first component and a second component. The first component comprises a hydrogel including at least one crosslinked polymer. The second component comprises a textile component. The composition has a thickness between about two tenths of a millimeter (0.2 mm) to about six tenths of a millimeter (0.6 mm), a suture retention strength between about one Newton (1 N) to about thirteen Newtons (13 N), a static coefficient of friction between about one hundredth (0.01) and about one-half (0.5), a kinetic coefficient of friction between about one hundredth (0.01) and about one-half (0.5) and a flexibility of less than thirty millimeters (30 mm) bend length. A method of reducing the occurrence of tissue adhesions following surgery comprises applying the membrane composition to a surgical site.

A sealing sheet for a solar cell, characterized in that it has a resin layer (S) composed of a resin composition containing a polyolefin resin, and the storage elastic modulus of the resin layer (S) at 25° C. is 200 MPa or less, And at least one side of the resin layer (S) is a sheet surface of the above sealing sheet, and the sheet surface satisfies the following conditions (a), (b) and (c). (a) The coefficient of dynamic friction on the strengthened glass of the whiteboard is 1.5 or less; (b) The surface roughness Rzjis is 0.1 to 50 μm; (c) The coefficient of static friction on the strengthened glass of the whiteboard is 1.5 or less.