58results about How to "Increase mechanical tensile strength" patented technology

The present invention relates to a preparation method of degradable polyglycolic acid. The preparation method comprises the steps of 1) adopting glycolic acid as a raw material, subjecting glycolic acid to dehydrating and refining under the vacuum condition to obtain a glycolic acid oligomer; 2) mixing the obtained glycolic acid oligomer with a catalyst, adding mixed materials into a reaction vessel, and subjecting the materials to heating reaction under the vacuum condition to obtain a polyglycolic acid intermediate; 3) adding a chain extender MDI into the reaction vessel of the step 2), and subjecting materials in the reaction vessel to heating reaction under the vacuum condition to obtain the high-molecular weight polyglycolic acid.

The invention provides an antibacterial deodorizing children's shoe lining made of nano composite material containing silver ions. The nano composite material is of matrix prepared through an acetalation PVA sponge, with high permeability and fine mechanical property, formed through chitosan composite. According to the children's shoe lining, the silver ions play bactericidal and antibacterial roles, the nano composite material has dense and uniform micro pores according to the micro structure, the water absorption performance is fine, the air permeability is high, and the volatilization of sweat in a shoe can be promoted; since the children's shoe lining and human organization are compatible, the toxic and side effect and stimulation are eliminated during direct skin contact, and large mechanical tensile strength can be maintained for a long term.

The invention discloses a lithium battery diaphragm. The lithium battery diaphragm comprises the following components in parts by weight: 93-96 parts of N,N-dimethylamide, 10-13 parts of polyacrylonitrile and 1-2 parts of lithium lanthanite oxide. A preparation method comprises the following steps of 1) mixing the N,N-dimethylamide and polyacrylonitrile powder to prepare a solution; 2) adding lithium lanthanite oxide powder into the mixed solution of the N,N-dimethylamide and the polyacrylonitrile, and carrying out uniform stirring by a stirrer; 3) putting a mixed solution into an electrostatic spinning device, carrying out sequential unidirectional spinning, namely, carrying out transverse reciprocating spinning first, and then carrying out longitudinal reciprocating spinning after the end is reached, until an initial point is reached; and continuing the next spinning to ensure that a fiber has three layers, wherein technological parameters of the electrostatic spinning device are asfollows: an electrostatic voltage is 15-20KV, a jet speed is 0.2-0.71ml/h, and a receiving distance is 16cm; and 4) carrying out vacuum drying on the fiber subjected to spinning forming at 45 DEG C for 5 hours so as to complete the preparation. The lithium battery diaphragm is high in structural strength, high in liquid absorption capacity, high in ionic conductivity, and convenient and fast to prepare.

The invention discloses a new line bridging method and a special bridging line. The special bridging line comprises three bridging units and a special bridge insulating rod, wherein each bridging unit comprises two fixed line clamps which are connected with a line; the bridging line is arranged between the two fixed line clamps; and the special bridge insulating rod is movably connected with the lower ends of the fixed line clamps. The line bridging method and the special bridging line can meet the requirements of bridging of lines of 110KV or less. A device has light weight and high universality, can be conveniently and flexibly operated and is safe to bridge, does not have hidden trouble, and is easy and convenient to transport, assemble and store. Working personnel do not need to work high above the ground. The structure of the bridging device does not have influence on other running equipment and has a broad operating range.

The invention discloses a pre-branched cable which is characterized by comprising a trunk cable, branch cables and a connecting joint. The trunk cable and the branch cables are the same in structure and each comprise a cable conductor, a cable insulating layer, a cable shielding layer and a cable sheath layer. The cross-sectional area of the cable conductor of each branch cable is smaller than that of the cable conductor of the trunk cable. The connecting joint comprises a conductor connecting fitting, a fitting insulating layer, a fitting shielding layer and a fitting sheath layer. The numberof the branch cables is two or three, and each branch cable is fixedly and electrically connected with the trunk cable through the connecting joint. The fitting insulating layer of the connecting joint is connected with the cable insulating layer of each cable into a whole. The fitting shielding layer of the connecting joint is overlapped with the cable shielding layer of each cable in a coveringmanner. The fitting sheath layer of the connecting joint is connected with the cable sheath layer of each cable into a whole.

An optoelectronic component (10) and a method for producing same are provided in various exemplary embodiments. The optoelectronic component (10) has a first electrically conductive contact layer (101), an electrically insulating layer (102) over the first electrically conductive contact layer (101), a second electrically conductive contact layer (103) over the electrically insulating layer (102), a first electrically conductive electrode layer (20) over the second electrically conductive contact layer (103), at least one optically functional layer structure (22) over the first electrically conductive electrode layer (20) and a second electrically conductive electrode layer (23) over the optically functional layer structure (22). The second electrically conductive contact layer (103) comprises a first recess (110). The electrically insulating layer (102) comprises a second recess (111) which overlaps the first recess (110). An electrically conductive through-contact (112) is arranged in the first recess (110) and in the second recess (111), said through-contact being guided to the first electrically conductive contact layer (101). The electrically conductive through-contact (112) is electrically insulated with respect to the second electrically conductive contact layer (103).

The invention relates to a method for preparing degradable polylactic acid. The method includes the steps that firstly, lactic acid serves as the raw material and is dehydrated and refined under the vacuum condition, and lactic acid oligomer is obtained; secondly, the lactic acid oligomer obtained in the first step is mixed with a catalyst, the mixture is added into a reaction container, a heating reaction is conducted under the vacuum condition, and a polylactic acid intermediate product is obtained; thirdly, a chain extender MDI is added to the reaction container in the second step, a heating reaction is conducted under the vacuum condition, and high-molecular-weight polylactic acid is obtained.

The invention relates to a charging pile cable, which comprises cable cores composed of multiple copper wires and an outer insulating sheath. An inner insulating sleeve is arranged on the outer surface of each cable core. A cable wrapping belt is arranged outside the inner insulating sleeves. An outer insulating sleeve, a return spring sheet, a copper wire armor layer and an aluminum-plastic wovenmesh are arranged in turn between the outer side of the cable wrapping belt and the outer insulating sheath. The outer insulating sleeve, the return spring sheet, the copper wire armor layer and thealuminum-plastic woven mesh are fixedly connected with one another. Under the action of the outer insulating sleeve, a better insulation effect can be achieved, and potential safety hazards are reduced. Through the setting of the return spring sheet, the copper wire armor layer and the aluminum-plastic woven mesh, the mechanical tensile strength of the cable in the construction process can be increased under the action of the return spring sheet, the copper wire armor layer and the aluminum-plastic woven mesh, the use safety of the cable can be improved, and normal operation of equipment can be ensured.

A method of preparing powdery bonding material for blankets of glass precursor fibers. It comprises, introducing anion polymeric emulsifying agent, preparing polymer emulsion with high content of solids, low viscosity and high stability by core-sheath polymerization, then obtaining powdery bonding material. The product has excellent bonding ability and cohesion, effectively improves mechanical pulling strength of glass precursor fiber.