9results about How to "Good strength properties" patented technology

The invention belongs to the technical field of resource utilization of engineering residue soil, and particularly discloses an adjustable backfill material based on low-viscosity fine-grained soil and a preparation method of the adjustable backfill material. The adjustable backfill material comprises the following components in percentage by mass: 65-85% of low-viscosity engineering waste soil, 5-10% of a high-strength curing material system, 0-1% of a fluidity promoting material system, 0-1.5% of a compactness reinforcing material system and 5-25% of water, wherein the sum of the percentages of the components is 100%. According to the backfill material, low-viscosity fine-grained soil serves as base soil, three different material systems including a high-strength curing material system, a fluidity promoting material system and a compactness enhancing material system are doped, and cured soil with the properties of high fluidization, self-compaction, controllable strength, low permeability and the like is obtained; the raw materials of the backfill material are simple and easy to obtain, the process is simple and convenient, different engineering requirements can be met by regulating and controlling the proportion of different material systems, and the problems that the muck containing area is insufficient and the disposal cost is high can be effectively solved.

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 present invention relates to a porous polyimide film, a separator for a secondary battery and a secondary battery. A porous polyimide film has a plurality of holes, the average flatness of the plurality of holes is in the range of 0.1 to 0.7, the coefficient of variation of the distance between the holes is in the range of 0.10 to 0.40, and the surface and the back are connected through the plurality of holes.

The invention belongs to the field of oil and gas well cementation and oilfield chemistry, and particularly relates to a curing liquid for improving the cementation quality of oily well wall interface cementation and application thereof, the curing liquid comprises the following raw materials by weight: 100 parts of oil well cement, 1 part of a fluid loss agent, 1-2 parts of an enhancer, and 44 parts of water; the interface reinforcing agent is a mixture of a silane coupling agent KH560, sodium methyl silicate and Tween 60, the oily well wall is an oil-based drilling fluid drilling well wall or a coal rock well wall, the curing liquid contains a special reinforcing agent, and the cementing quality of the curing liquid and the oily well wall is obviously superior to that of conventional oil well cement paste; the problem that the enhancement effect is lost after a traditional enhanced prepad fluid modified oily well wall interface is scoured by oil well cement paste is solved; the problem that oily well wall interface modification cannot meet requirements due to prepad fluid leakage is avoided, and the problems that oil well cement paste is too long in setting time and slow in strength development after a traditional interface reinforcing agent is added into the oil well cement paste are solved.

The invention discloses a supporting unit and system suitable for an assembly type concrete frame shear wall structure, and belongs to the technical field of building construction. An aluminum alloy short beam is connected between the two early-dismantling heads located on one side, the faces, away from each other, of the multiple early-dismantling heads located on the two sides are all connected with the aluminum alloy main beam, the portion between the two corresponding early-dismantling heads located in the middle is connected with the aluminum alloy main beam, and independent supporting rods are connected to the bottoms of the multiple early-dismantling heads; according to the invention, the bidirectional rigid beam structure is adopted as a formwork bearing beam, the optimization of horizontal lateral force resistance and anti-overturning performance is effectively realized through an integral stress system formed by the bidirectional rigid beams, and the structural design is unique in that an under-beam horizontal rod does not need to be additionally arranged, so that a spacious construction space is created at the lower part of the formwork; and the operation convenience of constructors is remarkably improved, so that the workers can safely and conveniently carry out passing and construction operation.

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.