5results about How to "Good mechanical elasticity" patented technology

The utility model provides a presser foot structure of a multi-needle machine, and belongs to the technical field of sewing machines. The problem of how to improve the sewing quality of the multi-needle machine is solved. The presser foot structure of the multi-needle machine comprises a connecting base, a presser foot plate with a plurality of needle holes and a presser foot support fixedly connected with the connecting base, the presser foot plate is located below the presser foot support, the two side edges of the presser foot plate are hinged to the presser foot support, and a torsional spring is arranged between the presser foot plate and the presser foot support. The bottom face of the presser foot plate inclines relative to the horizontal plane in the front-back direction and is high in front and low in back, and the presser foot plate can swing relative to the presser foot support and reset through elastic force of the torsion spring. The presser foot is simple, reasonable and stable in structure, the presser foot plate has mechanical elasticity, stable and reliable pressing force can be provided for cloth with different thicknesses, the cloth is not prone to loosening, the pressing effect is good, and the sewing quality of the multi-needle machine is greatly improved.

The application discloses a kind of foam-based flexible tactile sensor and its preparation method, the flexible tactile sensor has three-layer structure, middle layer is PEDOT:pss / rGO composite foam, the composite foam is tactile sensing material, and the upper and lower layers are both flexible PDMS film;The application uses simple and efficient hydrothermal synthesis method and subsequent flash instantaneous irradiation reduction method, and prepares a kind of three-dimensional porous PEDOT:pss / rGO composite foam, can effectively and maximumly keep the composite skeleton structure of original PEDOT:pss / GO foam, and makes PEDOT:pss polymer polymer and rGO sheet closely connected, so that PEDOT:pss / rGO composite foam has better mechanical elasticity and high conductivity, so that flexible tactile sensor has high sensitivity, ultra-low detection lower limit, short response time and good stability and other excellent performance, widely used in human health, motion monitoring and other fields.

The invention relates to a breakdown-resistant and aging-resistant power cable. A power cable has high anti-breakdown and anti-aging requirements, however, cable materials used at present, such as polyethylene, are poor in anti-aging capability. In order to solve the problem, the breakdown-resistant and aging-resistant power cable is invented, the breakdown-resistant and aging-resistant power cable is sequentially composed of a conductor, a conductor shielding layer, an insulating layer, a wrapping layer and a protective layer from inside to outside, and the conductor shielding layer is a composite shielding material composed of organic silicon, graphene and nano molybdenum dioxide. The organic silicon in the conductor shielding layer has good heat resistance and aging resistance; the graphene has good electric conduction and heat conduction performance, can shield electromagnetic waves, and can conduct heat out to reduce the temperature; the nano molybdenum dioxide can react with peroxide at high temperature, so that the degradation effect of the organic silicon resin is delayed, and the aging resistance of the cable can be effectively improved by combining the nano molybdenum dioxide, the peroxide and the organic silicon resin. The breakdown-resistant and aging-resistant power cable can be used in the fields of high-voltage power cables and the like.

The invention discloses an aramid composite aerogel, a supported aramid composite aerogel and a preparation method and application thereof, and the preparation method of the aramid composite aerogel comprises the following steps: uniformly mixing polyethyleneimine and an aramid nanofiber dispersion solution to obtain a composite solution, and freeze-drying the composite solution to obtain the aramid composite aerogel. The aramid fiber composite aerogel is obtained. Taking the aramid fiber composite aerogel as a substrate material, firstly spraying a homogeneous thermoplastic polyurethane solution on the surface of the substrate material by using a spray gun, then spraying a silicon dioxide suspension, and after spraying is completed, curing to obtain the loaded aramid fiber composite aerogel, the aramid fiber composite aerogel and the supported aramid fiber composite aerogel provided by the invention have excellent mechanical, sound-absorbing and heat-insulating properties.

The present disclosure provides a transparent elastic electronic skin of a wearable optoelectronic device and a preparation method thereof. The method comprises the following steps: obtaining an electrode patterned carrier; electrospinning an elastic polymer spinning solution on an electrode pattern layer of the electrode patterned carrier to obtain an elastic fiber membrane-electrode patterned carrier; immersing the elastic fiber membrane-electrode patterned carrier in water or an ethanol solution to obtain a conductive elastic fiber precursor membrane A; performing spin coating on the conductive elastic fiber precursor membrane A, and then drying and curing to obtain a conductive elastic fiber precursor membrane B; and performing selective wetting operation on the electrode pattern layer of the conductive elastic fiber precursor membrane B by using a liquid conductive metal to obtain the transparent elastic electronic skin of the wearable optoelectronic device. The transparent elastic electronic skin prepared by the method has high light transmittance, high mechanical elasticity, excellent air and moisture permeability, stable conductivity and suitable adhesion, so as to better meet the long-term dynamic high-precision wearing requirements.