36results about How to "Adjust breathability" patented technology

The invention relates to an alginate dressing for treating bedsores and a preparation method thereof. The dressing has a double-layer composite structure, that is, it is composed of a bottom layer and a surface layer, the bottom layer is an alginate composite film layer, and the surface layer is a natural rubber film layer ; Its preparation method comprises the following steps: A, preparation of shark collagen solution; B, preparation of coaxial electrospinning outer layer solution; C, preparation of coaxial electrospinning core layer solution; D, spinning; E, crosslinking ; F, impregnation; G, preparation of epoxidized natural rubber film; H, composite. The dressing prepared by the invention has good biocompatibility, controllable growth mediation of synthetic biological materials, good hygroscopicity, anti-inflammatory and antibacterial properties, can improve local blood supply of wounds, promote tissue growth, and accelerate wound healing, showing It has good versatility, good porosity, soft and comfortable hand feeling, good compliance, easy to use, and is suitable for use in the field of modern biomedicine, especially in the fields of bedsore treatment and care.

The invention relates to the technical field of switch cabinets, and discloses an electrical switch cabinet which comprises a shell, a moving cavity with a backward opening is formed in the shell, moving grooves are formed in the left side wall and the right side wall of the moving cavity in the front-back direction, and first ventilating grooves formed in the left-right direction are formed in the front side wall of the moving cavity at intervals. And a slidable moving plate is arranged in each moving cavity, a sliding block extending into the corresponding moving groove is arranged on each moving plate, and second ventilating grooves which are formed in the left-right direction and staggered with the first ventilating grooves are formed in the moving plates at intervals. By means of thestructure, due to the arrangement of the moving cavities, the moving plates, the first ventilation grooves and the second ventilation grooves, the sealing performance and the ventilation performance of the moving cavities are adjusted by adjusting the distance between the moving plates and the front side walls of the moving cavities.

A cigarette paper having low susceptability to ignition, comprising a common cigarette paper and a coating consisting of a film former, a viscosity modifier and a filler, brushed or printed on an internal surface of the common cigarette paper. Provided also is a method for preparing the cigarette paper having low susceptability to ignition, comprising the following steps: preparing the common cigarette papers with specification; adding the viscosity modifier and the film former to a suspension formulated from the filler; and adding the formulated size onto the surface of the cigarette paper via a screen by printing and coating.

The invention relates to a multifunctional sustained-release fertilizer. The multifunctional sustained-release fertilizer is prepared by the following methods that screened urea and potassium sulfate are placed in a stirrer for fully stirring by the weight ratio, after the urea and the potassium sulfate are uniformly mixed, a fertilizer pelletizer is utilized to conduct pelleting, and polyurethane resin is utilized to coat particles after pelleting; screened ammonium dibasic phosphate, magnesium sulfate, zinc sulfate, sodium octaborate, ammonium molybdata, alpha- Naphthyl acetic acid , alginic acid, vitamin C, polyacrylamide, humic acid and BSAD are placed in the stirrer for fully stirring by the weight ratio, and after the components are uniformly mixed, the fertilizer pelletizer is utilized to conduct pelleting; particles coated by the polyurethane resin and particles which are not coated by the polyurethane resin are fully uniformly mixed to obtain the multifunctional sustained-release fertilizer. The multifunctional sustained-release fertilizer can provide multiple required elements for growth of crops; a coating technology is adopted, so that the sustained-release effect can be achieved, and the utilization rate of the fertilizer is high; the crops can be stimulated to take root, soil can be improved, moisture and fertility can be preserved, rich water seepage force can be improved, continuous cropping can be resisted, soil-borne diseases are reduced, labor and time are saved, and yield and quality of the crops are improved.

The invention relates to the technical field of switchgear, and discloses an electrical switchgear, which includes a housing, in which a moving chamber with an opening facing backward is provided, and the left and right side walls of the moving chamber are provided with moving grooves along the front and rear directions. On the front side wall, there are first ventilation slots arranged along the left and right directions at intervals; a slidable moving plate is arranged in the moving cavity, and a slider extending into the corresponding moving groove is arranged on the moving plate, and there are intervals along the moving plate. The second ventilation grooves arranged in the left-right direction and staggered from the first ventilation grooves. Through the above structure, the present invention adjusts the sealing and air permeability of the moving chamber by adjusting the distance between the moving plate and the front side wall of the moving chamber due to the arrangement of the moving chamber, the moving plate, the first air-permeable groove and the second air-permeable groove.

Provided is a disposable wearing article which has air permeability capable of being adjusted so that the wearing article is kept at appropriate humidity, which can provide a comfortable texture against the wearer's skin, and which does not remove liniment from the wearer's skin. A disposable wearing article is provided with composite layers (11a, 11b) including: (a) first layers (12) having first and second main surfaces (12p, 12q; 12s, 12t) and also having formed therein through-holes penetrating through the main surfaces (12p, 12q; 12s, 12t); and (b) second layers (14) which each have a pair of main surfaces (14p, 14q; 14s, 14t), which each allow air to permeate between the main surfaces (14p, 14q; 14s, 14t), which consist of a hydrophobic material, and which are joined to the second main surfaces (12q, 12t) of the first layers (12). The first main surfaces (12p, 12s) have hydrophobic properties, and the disposable wearing article is worn by the user while the first main surfaces (12p, 12s) are adjacent to the wearer's skin.

The invention belongs to the technical field of batteries, and in particular relates to a multilayer composite aliphatic polyketone microporous membrane and a preparation method thereof. The preparation method of the multi-layer composite aliphatic polyketone microporous membrane disclosed by the invention comprises the following steps: using three extrusion casting machines to respectively melt and extrude the aliphatic polyketone and polypropylene to form a film, and pass through a multi-layer die Casting to obtain a multi-layer composite cast film, wherein the aliphatic polyketone is located in the outer layer, polypropylene is located in the middle layer, and the multi-layer composite cast film is sequentially subjected to heat treatment, heat stretching and heat setting to obtain a multi-layer composite film. Aliphatic polyketone microporous membrane; the multi-layer composite aliphatic polyketone microporous membrane disclosed by the present invention can effectively solve the problem that the microporous isolation membrane in the prior art has low closed cell temperature and poor thermal dimensional stability at high temperature. The technical defect that the battery is easy to run and has potential safety hazards.

The invention provides a method for preparing a high-temperature resistant co-extruded uniaxially stretched microporous membrane, which comprises the following steps: A) using three extrusion casting machines to respectively prepare polyphenylene sulfide and polytetramethylpentene The resin is melted and extruded, and multi-layer composite cast film is obtained through multi-layer die casting; wherein, polyphenylene sulfide is located in the outer layer, and polytetramethyl-pentene resin is located in the middle layer; B) the multi-layer composite cast film The film is heat-treated at 180-220°C for 0.3-2h to obtain a multi-layer heat-treated film; C) at 150-180°C, the multi-layer heat-treated film is stretched in the first stage, and the stretch ratio is 20%-80%; D) in 220-240°C, stretch the multilayer heat-treated film in the second stage, and the stretching ratio is 100%-120%; E) The microporous film obtained after the above-mentioned second stage stretching is set at 240-250°C for 1~ 5min to obtain a microporous membrane. The invention finally obtains a microporous diaphragm with uniform structure and high temperature resistance.