566 results about "Medium density" patented technology

A method and apparatus are provided for etching semiconductor and dielectric substrates through the use of plasmas based on mixtures of a first gas having the formula CaFb, and a second gas having the formula CxHyFz, wherein a / b≧⅔, and wherein x / z≧½. The mixtures may be used in low or medium density plasmas sustained in a magnetically enhanced reactive ion chamber to provide a process that exhibits excellent corner layer selectivity, photo resist selectivity, under layer selectivity, and profile and bottom CD control. The percentages of the first and second gas may be varied during etching to provide a plasma that etches undoped oxide films or to provide an etch stop on such films.

A cushion (10, 12) has a plenum (16) which includes a plurality of flexible plastic woven tubes (34) held within a pair of similarly woven sheathes (38,40). The plenum has its sides and bottom covered by an air impermeable (14) layer with the top covered by an air permeable layer (20). A low to medium density foam pad (19) is located between the plenum (16) and the top layer (20). Conditioned air is provided to the cushions (10,12) from a Stirling cycle heat pump (44).

This invention relates to blends of linear low density polyethylene copolymers with other linear low density polyethylenes or very low density, low density, medium density, high density, and differentiated polyethylenes. The invention also includes articles produced from the linear low density polyethylene and polyethylene blends described.

A coalescer filter element for the separation of water from hydrocarbon fluids, such as kerosene, jet fuel, diesel fuel, and gasoline under surfactant conditions such as thermal stability additive and dispersant. Coalescer fibrous material has hydrophobic properties which resist surfactant coating of the fibers thereby allowing breakdown of water emulsion in the hydrocarbon fluids. The coalescer has a negative media density gradient in the liquid flow direction.

A composite board is made from waste medium density fiber (MDF) board or waste particle board that includes solid urea formaldehyde. The waste board is chopped and milled into particles having a size between 20 mesh and 150 mesh, creating a waste flour. After removing moisture from the waste flour, the dried waste flour is mixed with a thermoplastic to bind and encapsulate the waste flour. Internal lubricants are added to improve the flow characteristics of the blended material, and external lubricants are added to present sticking of the mixture to an extruder or mold. Mineral fillers are added to improve the flexural modules of the composite board, and a plasticizer can be added to improve the physical properties or mechanical characteristics of the mixture. An ultraviolet absorber, a biocide, and a pigment can also be added. The blended material is extruded or molded into a desired shape. When cooled, the thermoplastic hardens to form a solid composite board.

A cementitious product and method of modifying the properties of a low or medium density FRC product by providing a predetermined pore size distribution. The pore size distribution is obtained such that in critical zones of the distribution, the pore volume is substantially equivalent to or less than the pore volume in a respective critical zone of a conventional high density FRC product. The resultant material provides improved properties over conventional medium density FRC products, in particular improved freeze / thaw durability and / or improved workability.

The present invention discloses one kind of making process of E1 / E0 level environment protection artificial plate. After plain plate with free formaldehyde releasing amount greater than or equal to E2 level is made with common urea resin adhesive, the plain plate is processed through ammonia vacuum process to lower the free formaldehyde releasing amount to E1 / E0 level. According to the density and initial formaldehyde releasing amount of the plain plate, the ammonia consumption and formaldehyde lowering time are regulated to control the processing effect. The said process has stable product quality and low cost, and is suitable for various artificial plates, including plywood, medium density fiber plate, high density fiber plate and shaving board.

An absorbent core structure having at least one acquisition region, at least one distribution region, and at least one storage region. The acquisition region being constructed from a fibrous material. The acquisition region having a relatively low density from about 0.018 g / cc to about 0.20 g / cc. The at least one distribution region being constructed from the fibrous material. The distribution region being consolidated to have a relatively medium density from about 0.024 g / cc to about 0.45 g / cc. The distribution region being in fluid communication with the acquisition region. The at least one storage region being constructed from the fibrous material. The storage region being consolidated to have a relatively high density from about 0.030 g / cc to about 0.50 g / cc. The storage region being in fluid communication with the distribution region. A portion of the fibrous material being formed into at least one peak and at least one valley and then subsequently closed on itself in order to cause the peaks to close to form insitubes.

This invention relates to a new and distinct variety of strawberry named `Ventura`. The variety is similar to the varieties `E26`, `Montalvo`, and `Baeza`. The variety is distinguished from `E26`, `Montalvo`, and `Baeza`, in particular, by its globose to flat globose habit, medium density, weak to medium vigor, medium leaf glossiness, calyx diameter that is smaller relative to the corolla, semi-erect attitude at first picking, conical to cordate fruit shape, slight differences in shape between the primary and secondary fruit, narrow band without achenes, insertion of the calyx that is in a basin to level, weak to medium adherence of the calyx, and fruit with firm flesh and a small hollow center.

A process for producing a thermoformable fibre-plastics composite product comprising lignolcellulosic or natural fibres, particularly but not exclusively useful as an intermediate product in subsequent manufacture, comprises conveying the fibres in a dry or wet air stream and applying to the fibres a thermoplastic binding agent, and forming the fibres into a solid or semi-solid product such as a panel, which is thermoformable. In at least a preferred embodiment the process may be carried out in known plant for manufacture of medium density fibre board.

A measurement pickup includes at least four measuring tubes for conveying media to be measured. Each measuring tube has a first in- / outlet end and a second in- / outlet end. During operation, the measuring tubes vibrate, at least at times, especially simultaneously. The measurement pickup further includes an electromechanical exciter mechanism causing the measuring tube to vibrate, as well as a sensor arrangement reacting at least to local vibrations of the measuring tubes for producing at least one measurement signal influenced by vibrations of the measuring tubes. Of the at least four measuring tubes, two measuring tubes are, at least at times, inserted into the course of a first medium-line such that each of these two measuring tubes simultaneously conveys, in each case, a partial volume of a medium flowing through the first medium line, and two other measuring tubes of the at least four measuring tubes are, at least at times, inserted into the course of a second medium line such that each of these two measuring tubes simultaneous conveys, in each case, a partial volume of a second medium flowing through the second medium line. The measurement pickup can thus, on the one hand, have two media flowing through it, which differ measurably from one another in at least one physical property, for example mass flow rate, medium density and / or medium temperature, while having, on the other hand, despite the different media, a good zero-point stability.

The present invention concerns a process for producing homogeneous polyethylene materials and processes for making high density, medium density and low density films therefrom. The process involves producing a polyethylene composition in a multistage reaction sequence of successive polymerization stages in the presence of an ethylene-polymerizing catalyst system. According to the invention, the process is carried out using an unsupported catalyst having magnesium and titanium as active constituents, in at least one loop polymerization stage and at least one gas phase polymerization stage and, operated with different amounts of hydrogen and comonomers to produce a high molecular weight portion in one of the polymerization stages and a low molecular weight portion in another so as to provide a polyethylene composition with the low molecular weight part having a MFR2 of 250 g / 10 min or more. With this process it is possible to obtain homogeneous bimodal polyethylene material.

The invention relates to a surface-decorated oriented strand board and a preparation process of the surface-decorated oriented strand board. The surface-decorated oriented strand board comprises a core layer and a surface layer. Rotary cut veneer leftovers left in the plywood production process are selected as raw materials of the core layer. Sawdust, wood shavings, waste fibers and sanding powder produced in the production process of glued-laminated timber, core-boards, particle boards or medium-density fiberboards are selected as raw materials of the surface layer. The raw materials are subjected to drying, screening, gluing, laying, plate blank sawing and cutting and hot-pressing, and then the surface-decorated oriented strand board can be manufactured. The static bending strength of the oriented strand board in the parallel direction can reach 22-30 MPa, the elasticity modulus of the oriented strand board can reach 3500-4800 MPa, and the surface roughness of the oriented strand board is less than 0.8 micron. The surface-decorated oriented strand board can be directly processed into a decorative surface and can also be widely used for replacing artificial boards such as plywood, the core-boards, the particle boards and the medium-density fiberboards.

Sound absorbing or attenuating laminate flooring materials are provided, which are directed to be used in the production of floor covering, floor panels, furniture panels, cabinets, counter-tops and wall panels. As well, the methods for producing such products are provided. In particular, abrasion resistant panels, with a laminated structure, created by forming an assembly which consists of laminating a heat-activated resin impregnated paper wear layer, a decorative layer with printed graphics or a wood veneer decorative layer, a medium density (MDF) or high-density (HDF) natural fiber-based core and a resin impregnated paper balancing layer. To achieve sound absorbing and / or attenuating properties, any or all paper layers may be pre coated with an additional flexible elastomeric coating, film or material prior to assembly of the panel, or the natural fiber core panel may be coated with a flexible elastomeric coating, film or material prior to assembly with the papers. The flexible elastomeric coating, film or material acts to absorb, reduce, and / or ameliorate the sound transmissions inherent in laminated panels.

A yoga comfort system wedge is provided constructed of medium density, high quality, closed cell foam materials and adhesives comprised of layers and septums which create a uniquely flexible prop. The construction forms a triangularly shaped yoga, fitness, or therapeutic device in the form of a flexible wedge which allows users to achieve or maintain certain poses, stretches, exercises or therapeutic positions while improving tactile comfort and aiding range of motion. Said device has advantages over traditional types of yoga, meditation, fitness, or therapy devices. The invention allows for users with specific physical limitations to comfortably modify and maintain desired poses or exercises which would not ordinarily be possible, while at the same time provides for the advanced user to practice their highly skilled activities with greater comfort and ease.

The centrifugation vessel includes an outer wall containing an interior space. A dam defines a barrier which divides the interior space into at least two regions including a catch basin defining a higher gee region and a reservoir defining a lower gee region. These regions are joined together over the dam. The dam includes a face which is preferably tapered to enable optimization of speed of separation of a sample placed within the vessel. The vessel is usable in a biological sample processing method by having the higher gee region of the vessel configured to have an elongate form and the volume optimized for collection of a higher density fraction of the sample. Supply and withdrawal tubes extend into the regions for reliable extraction and separate collection of differing density fractions after separation by centrifugation. A medium density fluid is used within the vessel to further isolate constituents of differing densities.

A measurement pickup includes at least four measuring tubes for conveying media to be measured. Each measuring tube has a first in- / outlet end and a second in- / outlet end. During operation, the measuring tubes vibrate, at least at times, especially simultaneously. The measurement pickup further includes an electromechanical exciter mechanism causing the measuring tube to vibrate, as well as a sensor arrangement reacting at least to local vibrations of the measuring tubes for producing at least one measurement signal influenced by vibrations of the measuring tubes. Of the at least four measuring tubes, two measuring tubes are, at least at times, inserted into the course of a first medium-line such that each of these two measuring tubes simultaneously conveys, in each case, a partial volume of a medium flowing through the first medium line, and two other measuring tubes of the at least four measuring tubes are, at least at times, inserted into the course of a second medium line such that each of these two measuring tubes simultaneous conveys, in each case, a partial volume of a second medium flowing through the second medium line. The measurement pickup can thus, on the one hand, have two media flowing through it, which differ measurably from one another in at least one physical property, for example mass flow rate, medium density and / or medium temperature, while having, on the other hand, despite the different media, a good zero-point stability.

The invention relates to an automatic edge brushing machine for a pipelined battery plate, and particularly to equipment for brushing the four edges of a plate automatically in production process of a lead-acid battery. The invention discloses a frame brushing machine which is a pipelined device formed by connecting a rack, a plate running device, a side edge brushing device, an upside edge brushing device, a plate pushing device, a downside edge brushing device and a plate receiving device in sequence. The pipelined device coordinates automatically under electrical control. With the frame brushing machine provided by the invention, automatic edge brushing of low- and medium-density lead alloy plates is realized, the transformation of the production process from a semi-manual labor to an automatic operation is fulfilled, production intensity and operation cost of a manual operation are greatly reduced, labor productivity is improved, and pollution to environment and harm to human bodies caused by lead dust are reduced.

Disclosed are an ethylene polymerization process, a catalyst for use in the process, a production method employing the catalyst, and a product produced thereby. More specifically, disclosed is a process of producing an ethylene copolymer from ethylene and an alpha-olefin comonomer, in which the produced ethylene copolymer has a multimodal molecular weight distribution and excellent processability and physical properties, and thus can increase the value and productivity of products, including pipes and films. Particularly, the produced ethylene copolymer has a trimodal or higher molecular weight distribution or density distribution, and thus, when it is a linear low-density copolymer, it has an excellent effect of improving the impact strength of films, and when it is a medium-density ethylene copolymer, it can be produced into pipes, which have slow crack growth rate and can be used even at high temperature.

The invention relates to the technical field of home decoration, in particular to a construction process for home wiredrawing antique decoration. The invention discloses a construction process for home wiredrawing antique decoration, which comprises the following steps: material sanding, polyurethane ground paint coating, polyurethane ground paint sanding, nitryl true color ground paint coating, nitryl true color ground paint sanding, wiredrawing paint effect coating, nitryl transparent ground paint coating, nitryl glazing, nitryl transparent ground paint coating, cloth printing, lighting and shading, nitryl transparent ground paint coating, nitryl transparent ground paint sanding, nitryl glaze dry brushing, nitryl ground paint coating and nitryl transparent surface paint coating. The process can effectively achieve the paint film visual fullness and solve the problems of nitryl paint surface light loss and partial color change of antique furniture. At the same time, the process not only can ensure that solid wood furniture achieves wiredrawing antique coating effect, but also can ensure that a medium density fiber board or other composite materials are endowed with the wiredrawing antique coating effect, so that the wiredrawing antique effect can be achieved without adopting solid wood.

An absorbent core structure having at least one acquisition region, at least one distribution region, at least one storage region. The acquisition region being constructed from a fibrous material. The acquisition region having a relatively low density from about 0.018 g / cc to about 0.20 g / cc. The at least one distribution region being constructed from the fibrous material. The distribution region being consolidated to have a relatively medium density from about 0.024 g / cc to about 0.45 g / cc. The distribution region being in fluid communication with said acquisition region. The storage region being constructed from the fibrous material. The storage region being consolidated to have a relatively high density from about 0.030 g / cc to about 0.50 g / cc. The storage region being in fluid communication with the distribution region. The fibrous material may be folded to form said absorbent core structure. The fibrous material may be rolled to form the absorbent core structure. The fibrous materials may be layered to form the absorbent core structure.

Provided are an ultraviolet-curing powder coating and processes for manufacture and painting, which relate to a manufacturing technique of the powder coating and an operation method. Unsaturated polyester resin, photoinitiators and flatting agents are put into an extrusion machine to be melted and mixed, after being frozen and broken, the unsaturated polyester resin, the photoinitiators and flatting agents are cribrated and classified, finally being packed, wherein the unsaturated polyester resin is provided with (methyl) acrylic acid of double bonds. The ultraviolet-curing powder coating manufactured through the process resolves the problem of the products of the existing technique that the products are not high-temperature resistant and the powder-painting problem of thick substrates. The ultraviolet-curing powder coating increases the curing speed of the powder coating, the leveling property of paint film is good, and chemical resistance and other mechanical properties are also good. The ultraviolet-curing powder coating can be widely used in the painting of wood, plastic, paper, preassembled elements, truck evaporators and the like, in particular to thermosensitive base materials of medium density fiber board (MDF), plastic, paper, soldering elements, assembly parts of electronic components and the like.

A item separating or debris eliminating system includes a tank and a pump for circulating water from one end of the tank around through a duct and back into the opposite end of the tank. A medium density object collector is located within the tank, and a light debris collector is located within the tank. A conveyor filter is included through which substantially all of the water in the tank is circulated. The debris eliminating system preferably also includes a high density object collector within the tank. The system can be used to separate a variety of objects having different densities and terminal velocities in a fluid. Most preferably, the system is utilized for separating debris from potatoes and the like produce.

Sound absorbing or attenuating laminate flooring materials are provided, which are directed to be used in the production of floor covering, floor panels, furniture panels, cabinets, counter-tops and wall panels. As well, the methods for producing such products are provided. In particular, abrasion resistant panels, with a laminated structure, created by forming an assembly which consists of laminating a heat-activated resin impregnated paper wear layer, a decorative layer with printed graphics or a wood veneer decorative layer, a medium density (MDF) or high-density (HDF) natural fiber-based core and a resin impregnated paper balancing layer. To achieve sound absorbing and / or attenuating properties, any or all paper layers may be pre coated with an additional flexible elastomeric coating, film or material prior to assembly of the panel, or the natural fiber core panel may be coated with a flexible elastomeric coating, film or material prior to assembly with the papers. The flexible elastomeric coating, film or material acts to absorb, reduce, and / or ameliorate the sound transmissions inherent in laminated panels.

An Ergonomic Bed / Slipper-Sock (EBSS) combines a sock component with a sole component that may be shock-absorbing, integrated medium-density, highly flexible and slip-resistant. The sock component can be integrated (pre-vulcanized) with inserts to prevent the twisting or turning of the EBSS when worn on a foot of a user. The sole component may ergonomically conform to the anatomy of the foot and be fabricated from a variety of materials.

The invention relates to a graining roll-coating production-line method for carpentry waterborne coating material on medium density fiber board. The invention is characterized by the following steps: (1) processing raw material; (2) roll coating waterborne white primer; (3) roll coating middle-coating primer; (4) roll printing to color; (5) roll coating fining varnish. The invention is advantageous in that the environment-friendly waterborne carpentry material and the novel coating method are applied on low-priced heavy density fiberboards to produce high-quality furniture boards with graining coating effect, provided with low coating consumption, high coating effectiveness and low coating cost]

The present invention discloses a medium-density fibreboard with low formaldehyde-discharging quantity and a production method thereof. The dosage of E2 grade urea-formaldehyde resin is 165 kg / m<3> to 175 kg / m<3>, and the dosage of high-efficiency formaldehyde trapping glue is 5 percent to 20 percent of the dosage of the E2 grade urea-formaldehyde resin and is mixed with the E2 grade urea-formaldehyde resin with a molar ratio of 1.05 to 1.15 in order to form adhesive, which is then applied into wood fibres. Without changing the hot-pressing and hot-grinding techniques in the production of E2 grade medium-density fibreboards, the applied adhesive dosage of the urea-formaldehyde resin of the E2 grade medium-density fibreboards and the dosage of waterproof agent, the discharging quantity of medium-density fibre formaldehyde can be reduced by 50 percent to 80 percent, thus realizing the standard requirement of environment-friendly E1 grade and E0 grade artificial boards. Compared with the E2 grade medium-density fibreboards produced with the same equipment and production technique, the physical mechanical property of the E1 grade and E0 grade medium-density fibreboards is notably improved, the production cost is low, the product quality is stable, the antiaging property is excellent, and the product quality measures up to and is better than standard high-class products and E1 grade requirements.