40results about How to "Uniform mechanical strength" patented technology

A crosslinkable rubber composition comprising 0.2 to 10 parts by weight of an aromatic secondary amine-based anti-aging agent and 0.5 to 20 parts by weight of a polyamine-based crosslinking agent with respect to 100 parts by weight of a nitrile rubber including an α,β-ethylenically unsaturated nitrile unit and an α,β-ethylenically unsaturated dicarboxylic acid monoester unit, and with iodine value of 120 or less. The present invention can provide a crosslinkable rubber composition, providable of a cross-linked rubber excellent in a variety of properties such as mechanical strength and small in compression set, and a cross-linked rubber obtained by cross-linking the rubber composition.

An ultrasonic sensor composed of a substrate and a piezoelectric vibrator mounted on the substrate is advantageously used as a sensor for detecting a distance to an object located in front of an automotive vehicle. Ultrasonic waves transmitted from the sensor are reflected by the object, and the reflected waves are received by the sensor. Based on the reflected waves, the distance from the vehicle to the object is calculated. To reduce rigidity and thereby to lower a resonant frequency of the substrate to a desirable level, grooves are formed in the substrate. A thickness of the substrate is not reduced to maintain its mechanical strength against an impact force. A resonant frequency which is desirable to realize a sufficiently high directivity and sensitivity is obtained in this manner without enlarging a size of the ultrasonic sensor.

The invention discloses an infinite-arbitrary-length bamboo chip integrated material. The infinite-arbitrary-length bamboo chip integrated material is formed by a plurality of lengthened bamboo chipswhich are glued and overlaid; each lengthened bamboo chip is formed by a plurality of bamboo chip units which sequentially and continuously mesh and are connected in a butt joint mode; sharp teeth andgrooves are formed in the two ends in the length direction of the bamboo chip units, wherein the sharp tooth of each bamboo chip unit and the groove of the corresponding bamboo sheet unit are matchedto form a meshing butt-joint part, and the meshing butt-joint parts of the adjacent lengthened bamboo chips are arranged in a staggered mode; and the thickness of the bamboo chip units is 4-12 mm, and the width of the bamboo chip units is 15-50 mm. The invention further provides a manufacturing method of the bamboo chip integrated material. The manufacturing method comprises the steps of preparation of the bamboo chip units, meshing butt-joint, hot-pressing gluing and the like. The infinite-arbitrary-length bamboo chip integrated material and the manufacturing method thereof have the advantages that connectors are small, the mechanical strength is uniform, and the infinite-arbitrary-length bamboo chip integrated material is suitable for structures such as van truck bottom plates.

A manufacturing process for making short fiber low denier unitized composite fabrics with abrasive features includes steps of depositing an assembly comprising one or more layers of fibrous material and optionally one or more layers of non-fibrous material, at least one of the outer layers containing a multicompartment synthetic fiber, and activating at least one component of the multicomponent fiber to impart an abrasive attribute to the outer surface.

A silica-containing conjugated diene based rubber composition which is prepared by co-coagulating an aqueous dispersion or a solution of a conjugated diene based rubber (a) having a glass transition temperature of -120 to 0 DEG C and an aqueous dispersion of silica, so as to form a conjugated diene based rubber-silica mixture (A) containing 30 wt % or more of a component insoluble in toluene, and then compounding the above mixture with a conjugated diene based rubber (b) having a glass transition temperature being different from that of the above conjugated diene based rubber (a) by an absolute value of 3 to 100 DEG C. The above rubber composition can be suitably used for producing a tire tread which offers a balance in high degree of low fuel consumption, wet grip characteristics, mechanical strength, abrasion resistance and low temperature impact resistance.

The invention discloses a cold drawing welded tube manufacture process for a high-accuracy hydraulic oil cylinder, which sequentially comprises the following steps of longitudinal shearing, roll bending molding, high frequency welding, welding joint treatment, online eddy current testing, sizing cutting, normalization, pinching, surface treatment, cold drawing, annealing, straightening, defect detection and cutting for measurement. The method is quick in processing molding, high in production volume, free of damage on surfaces in cold drawing and high in manufacture accuracy. After cold drawing, bearing capacity of a welded tube is improved by about 60%, and the welded tube is high in tensile strength and good in elongation rate. Follow-up gold processing amount is reduced, utilization rate of steel materials is improved, and manufacture cost is reduced. The cold drawing welded tube can be directly applied to manufacture of high-accuracy hydraulic oil cylinders.

The invention discloses a transmission display module and a driving method thereof. The transmission display module comprises a transparent display panel, a first light source module, a second light source module, and at least an adhesion layer. The first light source module and the second light source module are respectively configured on two opposite surfaces of the transparent display panel, wherein the first light source module comprises a first light guide plate and a first light source, and the second light source module comprises a second light guide plate and a second light source. The adhesion layer at least adheres the transparent display panel and the first light guide plate, and the refractive index of the adhesion layer is lower than the refractive index of the first light guide plate. The transmission display module has ideal mechanical strength and uniform light emission. In addition, the driving method for the transmission display module provides a plurality of display modes through controlling on-off of the first light source and the second light source and timing sequence of the transparent display panel.

Provided are an aromatic vinyl polymer resin composition capable of being molded into resin foam sheets having good surface smoothness and glossiness well balanced with the mechanical strength thereof even when the expansion ratio in molding is increased, and resin foam sheets and containers of the composition. The resin composition comprises (A) from 80 to 98% by mass of an aromatic vinyl polymer resin having a weight-average molecular weight measured through GPC of from 200,000 to 400,000, a ratio of weight-average molecular weight to number-average molecular weight ranging from 2.2 to 3.6, a number of branches of from 0.1 to 1.0 in one molecule having an absolute molecular weight of 1,190,000 measured through GPC-MALLS, and a melt flow rate of from 1.5 to 3.5 g / 10 min, and (B) from 2 to 20% by mass of a styrene-diene block copolymer or its hydrogenate. This is molded into a resin foam sheet through extrusion foaming, and the sheet is thermoformed into containers.

The invention discloses a double-liquid grouting construction method, which is characterized by comprising the following steps: 1) installing a first grouting pipe and at least one second grouting pipe at a place to be grouted; Inject the grout into the first grouting pipe, stop grouting when the grout overflows from the mouth of the first grouting pipe, and then pour the grout into the second grouting pipe after the grout is in a gel state; 3) When the grouting flow in the second grouting pipe reaches 15L / min~20L / min, the grouting is continued after 5min~10min, and then the grouting is stopped. This method can not only quickly reinforce the area with low soil strength, but also the mechanical strength of the reinforced soil body is uniform, and the soil body can maintain self-stable after excavation, which meets the construction safety requirements.

A radio frequency (RF) heat dissipating plastic is provided. The radio frequency heat dissipation plastic according to one embodiment of the present invention comprises: a polymer matrix comprising a polymer resin; and a first filler dispersed in the polymer matrix and including a high-strength filler and an inorganic coating layer, the high-strength filler being a polymer having at least one hydroxyl group in a repeating unit, and the inorganic coating layer being formed on at least a portion of the surface of the high-strength filler. Accordingly, because the radio frequency heat dissipation plastic contains the first filler, the radio frequency heat dissipation plastic simultaneously shows the effects of low dielectric constant and excellent mechanical strength. Moreover, even if the composition is designed to have a low dielectric constant and excellent mechanical strength, the composition exhibits excellent heat dissipation performance due to the inclusion of the second filler for improving heat dissipation characteristics. In addition, since the first filler and the second filler have excellent dispersibility, uniform low dielectric characteristics, mechanical strength, and heat dissipation characteristics are exhibited over the entire region. According to the radio frequency heat dissipation plastic which shows uniform low dielectric characteristics, mechanical strength and heat dissipation characteristics in the whole area, performance reduction or function loss of a repeater box body which is possibly influenced in the aspect of transmitting and receiving high-frequency-band signals according to dielectric constants can be reduced to the maximum extent; therefore, the material can be widely applied to various articles in the whole industry.