36results about How to "Adjust breathability" patented technology

The invention relates to an alginate dressing for treating bedsore and a preparing method thereof. The dressing has a double-layer composite structure, namely the dressing comprises a base layer and a surface layer. The base layer is an alginate composite film layer. The surface layer is a natural rubber film layer. The preparing method includes following steps of: A) preparing a shark collagen solution, B) preparing a coaxial electrospinning outer layer solution, C) preparing a coaxial electrospinning core layer solution, D) spinning, E) crosslinking, F) dipping, G) preparing an epoxy natural rubber film, and H) compositing. The dressing has good biocompatibility, and has controllable growth regulation, good hygroscopicity, good anti-inflammation performance and good antibacterial performance of synthetic biological materials. The dressing is capable of improving local blood supply of wounds, promoting tissue growth and accelerating wound healing, shows good multifunctional properties, has good porosity, soft and comfort hand feeling, good compliance and using convenience, and can be used in the field of modern biomedicine, especially in the field of bedsore treatment and nursing, and the like.

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 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 discloses a gas interval-type droplet evaporation-resistant micro fluidic chip apparatus. The micro fluidic chip apparatus comprises a control probe; a liquid drop plate used for bearing the micro liquid drop; an evaporation-resistant cover plate with an enclosed hood covered on a liquid drop bearing surface of the liquid drop plate, wherein a through hole structure used for avoiding a control probe when the liquid drop is generated is arranged on the position of the evaporation-resistant cover plate facing to a liquid drop zone; an enclosed space is formed between the evaporation-resistant cover plate and the liquid drop plate, wherein the enclosed space is filled with gas; after the micro liquid drop is generated, an isolation gap is generated between an evaporation-resistant phase and the micro liquid drop; and the evaporation-resistant phase is sealed in the through hole structure or the end face of the through hole structure. The evaporation-resistant phase does not directly contact with the micro liquid drop, by using a method for using gas to space the evaporation-resistant phase and the micro liquid drop in a formed local enclosed space, the cross contamination problem between the micro liquid drop and the evaporation-resistant phase as well as the micro liquid drop and the micro liquid drop can be completely avoided, and the evaporation-resistant and interval problems of the micro liquid drop can be solved.

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 provides a method for preparing a self-flame-retardant co-extruded uniaxially stretched microporous diaphragm, comprising the following steps: A) using three extrusion casting machines to respectively prepare polyphenylene sulfide and polypropylene or a copolymer containing polypropylene Polypropylene mixed resin is melt-extruded, and multi-layer composite cast film is obtained through multi-layer die casting; among them, polyphenylene sulfide is located in the outer layer, and polypropylene or polypropylene mixed resin containing polypropylene copolymer is located in the middle layer ; B) heat-treating the multi-layer composite cast film at 100-150°C for 8-20 hours to obtain a multi-layer heat-treated film; C) stretching the multi-layer heat-treated film at 80°C for the first stage, and the draw ratio is 3%-20 %; D) 130 ~ 140 ℃ for the second stage of stretching the multi-layer heat treatment film, the stretching ratio is 100% ~ 120%; E) the microporous film obtained after the above second stage stretching Shaping for 3 to 4 minutes, and then thermal shock shaping at 240°C for 5 to 8 seconds to obtain a microporous diaphragm.

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 relates to sintered flux for nickel-based band electrode submerged-arc welding, and particularly discloses the sintered flux for nickel-based band electrode submerged-arc welding. The sintered flux is characterized by being prepared through dry powder compositions and binder water glass, the dry powder compositions include, by mass, 20% to 50% of CaF2, 20% to 40% of Al2O3, 10% of 20% of MgO, 5% to 10% of SiO2, 5% to 15% of CaO, 1% to 5% of sodium fluoride, 1% to 5% of rare earth fluoride and 1% to 5% of ferrocolumbium powder, and for the binder water glass, the ratio of kalium to natrium is 2 to 1, the modulus ranges from 2.4 to 3.5, the baume degree under a room temperature ranges from 39 to 45, and the weight of the binder water glass accounts for 20% to 30% of the weight of the dry powder. The sintered flux can be used in cooperation with EQNiCrMo-3, EQNiCr-3 and various nickel-based solder strips, when the sintered flux is used in cooperation with the nickel-based solder strips for band electrode submerged-arc welding, the stable built-up welding process and excellent welding process performance can be kept within a wide welding process parameter range, a built-up welding layer is excellent in forming quality, and all indexes of the built-up welding layer meet the use requirements of a user.

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.