46results about How to "Consider heat resistance" patented technology

A junction structure is provided with: an electrode of a substrate; an electrode of a semiconductor element; and a junction section that joins the electrode of the substrate, and the electrode of the semiconductor element. Starting from the electrode of the substrate and progressing toward the electrode of the semiconductor element, the following layers are placed in the following sequence in the junction section: a first intermetallic compound layer that contains a CuSn-based intermetallic compound; a Bi layer; a second intermetallic compound layer that contains a CuSn-based intermetallic compound; a Cu layer; and a third intermetallic compound layer that contains a CuSn-based intermetallic compound.

A preparation method of an aryl-containing boron thermoplastic phenolic resin. The method is as below: adding a phenolic compound and a divalent metal salt catalyst into a reaction kettle, adding an aldehyde compound by two times, wherein after the first addition, reacting at 50-70 DEG C for 0.5-2 h, and after the second addition, adding an acidic catalyst, heating to a reflux reaction state for reaction, then removing generated water and unreacted phenolic compounds to obtain the thermoplastic phenolic resin; and adding a boronic acid-containing compound into the thermoplastic phenolic resin, then heating to 100-120 DEG C, removing generated water to obtain the aryl-containing boron thermoplastic phenolic resin; or directly mixing the thermoplastic phenolic resin with the boric acid-containing compound in a solvent evenly and drying to obtain the aryl-containing boron thermoplastic phenolic resin. As the added boronic acid-containing compound contains aryl boric acid, the prepared aryl-containing boron thermoplastic phenolic resin has low water absorption rate and low curing temperature, not only has excellent thermal properties but also shows superior processing and mechanical properties.

The invention belongs to the precision casting technique and relates to a water-soluble ceramic core material and a preparation method thereof. The water-soluble ceramic core material comprises a high-temperature ceramic material, water-soluble inorganic salts, metallic oxides and at least one amorphous ceramic material. The preparation method comprises the following steps: raw material pretreatment, raw material weighing, mixing, mold core forming, degreasing, sintering and secondary sintering. According to the water-soluble ceramic core material and the preparation method, the properties of surface quality, dimensional precision, foaming level, mechanical strength, heat resistance, water solubility, environment friendliness and the like of the mold core can be considered, and scientific research and production requirements of aluminum alloy are met.

The present invention is one kind of thermoplastic polyurethane with weight average molecular weight of 200-800 KD. The thermoplastic polyurethane is prepared with one or two kinds of diisocyanate, one or several kinds of polyol of molecular weight 1000-8000, and chain extender comprising one kind of low molecular weight diol and one kind of aromatic diamine. The thermoplastic polyurethane may beapplied in producing film and spun product possessing high heat resistance, high elasticity and high flexibility.

The invention relates to the field of vacuum equipment, in particular to a heat-radiation-resistant high pumping speed cryogenic pump, which includes a refrigerator, a casing is installed on the refrigerator, and a cold head of the refrigerator is located in the casing; the cold head is provided with a first-stage Cold plate, secondary cold plate; the opening of the shell is provided with a front baffle, the heat radiation entering from the opening of the shell can pass through the front baffle and hit the shell to be reflected and absorbed, from the shell The gas entering through the opening of the body can be guided to the primary cold plate and the secondary cold plate by the front baffle. The advantage of the present invention is that: through the front baffle structure of this solution, the purpose of heat radiation and separation of gas molecules can be basically realized, thereby greatly reducing the heat radiation received by the cold plate of the cryopump, and because the gas movement channel is relatively smooth, Higher gas pumping speed can be achieved, so as to take into account the heat radiation resistance and high pumping speed.

An object of the present invention is to provide a polycarbonate resin composition, a method for producing the same, and a molded article of the polycarbonate resin composition that can balance impact resistance at a high level. The present invention relates to a polycarbonate resin composition containing a polycarbonate resin (A) and a polyrotaxane (B), a method for producing the same, and a molded article of the resin composition. The polycarbonate resin (A) Contains a structural unit derived from a compound represented by formula (1).

The invention discloses a fiber elastomer secondary polymerization process, which comprises the following steps: adopting a fiber elastomer layered by hot-melt fibers and elastic polyester fibers in a net; and performing penetrating deep cleaning on the fiber elastomer by spraying or soaking ; The fiber elastomer after deep cleaning is modified by spraying the modified solution, and the modified solution includes at least softener and chain extender; the sprayed fiber elastomer is heated by a hot air blower to obtain secondary polymerization Fiber Elastomer. The invention can improve the elasticity and softness of the fiber elastic body through the secondary polymerization process, meet the elastic recovery and softness requirements of cushions, mattresses and other cushion bodies, and has excellent fatigue resistance. By modifying the fiber elastomer before welding, it can take into account both heat setting and heat resistance, and the welding surface can be effectively protected, while the rigidity of the welding can be prevented, and the elasticity of the matrix will not be lost. The technological process is concise and ingenious, and is easy to implement and popularize.