5results about How to "Good strength properties" patented technology

This electromagnetic steel sheet with an adhesive film is provided with: an electromagnetic steel sheet; and an adhesive film provided on at least a portion of one or both surfaces of the electromagnetic steel sheet, the adhesive film containing a crosslinkable thermoplastic resin (A) and a thermoplastic resin (B) other than the crosslinkable thermoplastic resin (A), the adhesive film having a hardness of 200-260 MPa, and the adhesive film having a hardness of 200-260 MPa. The adhesive film has a hardness of 200 to 300 MPa after the adhesive film is heated at 200 DEG C for 5 minutes.

This invention provides a polyamic acid solution, polyimide, a polyimide film, its preparation method, and its applications. The polyimide film is obtained by blending a low-crosslinking, high-molecular-weight polyamic acid solution with a high-rigidity, low-molecular-weight, crosslinkable polyamic acid solution, followed by solution molding and imidization. This invention utilizes a crosslinked sacrificial network structure to dissipate energy during material stretching, while avoiding material uniformity problems caused by introducing other incompatible systems. The performance advantages of the constructed interpenetrating network structure effectively improve the overall mechanical properties of the polyimide film. The resulting polyimide film exhibits excellent mechanical properties and can be used as a flexible display substrate, etc.

The invention relates to the technical field of high polymer materials, in particular to a halogen-free flame-retardant reinforced PP / ABS alloy material, a preparation method thereof and an explosion-proof distribution box shell, and aims at solving the problems that although efficient flame retardance can be achieved through a traditional halogen flame-retardant scheme, a large amount of toxic smoke dust and corrosive hydrogen halide gas are released in the combustion process, and the flame retardance is poor. And increasingly strict environmental protection laws and regulations are seriously violated. The invention solves the problems that the interface compatibility of matrix resin and filler is deteriorated, the mechanical property of the material is obviously deteriorated, the tensile strength and impact toughness are greatly reduced, the processing fluidity becomes poor and the forming is difficult due to the fact that the common filler such as aluminum hydroxide or magnesium hydroxide needs to reach the same flame retardant grade at an extremely high adding proportion after turning to a halogen-free flame retardant system. By optimizing the proportion of matrix resin and introducing halogen-free flame-retardant components and glass fibers for reinforcement, the flame-retardant and mechanical properties are effectively balanced, meanwhile, halogen pollution is avoided, and the halogen-free flame-retardant glass fiber reinforced plastic has excellent halogen-free flame-retardant properties, good mechanical strength and environment-friendly characteristics.

The utility model discloses an anti-interference petrochemical engineering inclination measuring device, and belongs to the technical field of petrochemical engineering, the anti-interference petrochemical engineering inclination measuring device comprises an outer shell, a protective cover layer is fixedly mounted in the outer shell, a first mounting seat is fixedly mounted in the protective cover layer, and the first mounting seat is close to the midpoint of the outer shell; a first mounting seat is fixedly mounted in the outer shell, an X-axis MEMS chip is fixedly mounted in the first mounting seat, a second mounting seat is fixedly mounted on one side of the first mounting seat in the protective cover layer, a Y-axis MEMS chip is fixedly mounted in the second mounting seat, and a central processing unit is fixedly mounted on one side of the protective cover layer in the outer shell. High measurement accuracy can be kept even in a strong electromagnetic field, meanwhile, the protective cover layer is installed in the outer shell, the size and weight of the device are reduced through the optimized overall layout, and the practicability and convenience of the device are greatly improved.

This disclosure relates to polyethylene with high pressure resistance and cross-linked polyethylene pipes containing the same. The polyethylene of this disclosure has a high melt index and density, and exhibits sufficient cross-linking, thereby exhibiting excellent strength and pressure resistance properties.