83results about How to "Reduce stuffiness" patented technology

The invention discloses a full-biodegradable paper diaper breathable bottom film, and relates to the technical field of paper diaper production, and the full-biodegradable paper diaper breathable bottom film comprises the following components by weight: 45-55 parts of polylactic acid, 35-45 parts of a starch-based polymer, 10-12 parts of plant short fiber, 8-10 parts of bamboo fiber, 2-4 parts of a photosensitizer, 5-10 parts of polyvinyl alcohol, and 1-3 parts of lavender essential oil. According to the present invention, the starch-based polymer can enhance the biodegradability and the flexibility, the bamboo fiber can improve the water absorption and the natural antibacterial property, and can accelerate the degradation; the photosensitizer accelerates the degradation speed of the material under illumination, and the biodegradable material is adopted, so that the pollution to the environment is reduced, and the requirement of sustainable development is met.

The invention discloses a preparation method of a lead-free breathable porous aerogel material for neutron protection, which comprises the following steps: respectively arranging a plurality of functional thermoplastic polyurethane elastomer films on two surfaces of a shielding powder filled porous aerogel layer, and tightly combining the functional thermoplastic polyurethane elastomer films with the shielding powder filled porous aerogel layer, the structural strength of the porous aerogel layer filled with the shielding powder can be enhanced, meanwhile, the mass of the protective material is reduced, and the protective emphasis and the protective effect of the protective function of the porous aerogel layer filled with the shielding powder can be enhanced according to the type and the content of the functional shielding powder; the protective property and serviceability of the porous aerogel layer filled with the enhanced shielding powder can be ensured at the same time; the functional shielding powder can enter the aerogel, and the content of the functional shielding powder is increased by utilizing the characteristic that the aerogel is porous, so that the probability that neutron rays penetrate through gaps is effectively reduced, and the shielding capability on the neutron rays is greatly improved.

The invention relates to the technical field of phototherapy instruments, in particular to a light system of a phototherapy mask and a phototherapy method.The light system comprises a mask body, a flexible lamp panel, a lamp wick module, a phototherapy detection module, a silica gel film and a breathable film, the mask body is provided with a sinking groove, the flexible lamp panel is arranged in the sinking groove, the lamp wick module and the phototherapy detection module are both arranged on the flexible lamp panel, and the silica gel film is arranged on the silica gel film. The silica gel film is arranged on the sinking groove and covers the lamp wick module and the phototherapy detection module; the phototherapy detection module comprises a temperature sensing module, a distance measuring module and a humidity sensing module, the silica gel film is provided with a light-transmitting groove, the light-transmitting groove is opposite to the lamp wick module, the breathable film is arranged on the silica gel film, the breathable film is provided with a through groove, and the through groove is opposite to the light-transmitting groove, so that the lamp wick module is exposed. Through ingenious combination of the mask body, the flexible lamp panel, the lamp wick module, the phototherapy detection module, the silica gel film and the breathable film, high integration of the phototherapy equipment is realized.

The utility model discloses a hygroscopic warp-knitted fabric and clothes made of the hygroscopic warp-knitted fabric. The moisture-absorbing warp-knitted fabric comprises a fabric body, the fabric body is formed by knitting a guide bar GB1 and a guide bar GB2 in a warp knitting mode, yarn laying of the guide bar GB1 is moisture-absorbing yarn, and yarn laying of the guide bar GB2 is elastic yarn; the ratio X / Y of the width X formed by the open loops of the fabric body to the width Y formed by the three adjacent closed loops on one side and the horizontal distance between the open loops and the closed loops is 1 / 4-1 / 3, and the angle alpha formed by an inlet extension line and an outlet extension line of a first yarn forming loop in the fabric body ranges from 90 degrees to 160 degrees. The moisture-absorbing warp-knitted fabric and the clothes made of the moisture-absorbing warp-knitted fabric are stiff, wide and stylish and have good moisture-absorbing and sweat-releasing effects.

The invention discloses a comfortable and firm medical fixation belt, which relates to the technical field of medical fixation belts and comprises a fixation belt body, both side surfaces of the fixation belt body are provided with storage bags, the interiors of the two storage bags are respectively provided with a main side strap and a secondary side strap, a ventilation mechanism, the ventilation mechanism is composed of a support component and an adjustment component, the support component comprises: a back support plate and a plurality of side support plates, the surface of each horizontal plate is provided with a plurality of ventilation holes, the adjustment component comprises: a plurality of adjustment boxes, the plurality of adjustment boxes are located inside the fixation belt body, and a tensioning mechanism, the tensioning mechanism comprises: two movable plates, the two movable plates are respectively located on the both side surfaces of the fixation belt body, and a connecting frame is provided on one side surface of the movable plate. In the present scheme, by providing the ventilation mechanism and the tensioning mechanism, the restraint and discomfort that may be caused by the traditional fixation belt during breathing are avoided, the stuffiness of the wearer is reduced, and the wearing comfort and health are improved.

The invention relates to the field of hygienic products, and discloses a macroporous super-breathable, dry and comfortable hygienic product and a preparation process thereof, and the macroporous super-breathable, dry and comfortable hygienic product comprises a macroporous non-gel composite non-woven fabric, a nano platinum antibacterial layer, intelligent super absorbent resin and a softened surface layer. A macroporous structure is introduced into the surface of the non-woven fabric, so that the absorption speed of liquid and the air circulation are obviously improved; the nano platinum antibacterial layer endows the product with efficient antibacterial performance, effectively inhibits the growth of bacteria, and improves the hygienic guarantee of a user; the intelligent SAP automatically adjusts the water absorption capacity according to the environment humidity, rapidly expands under the high-humidity condition, improves the water absorption efficiency, locks the liquid and prevents the liquid from permeating back; the surface layer subjected to softening treatment further improves the comfort and the skin-friendly property of the product, and skin friction is reduced. The product is suitable for baby diapers, female sanitary napkins and adult incontinence nursing products, excellent air permeability, dry and comfortable performance and antibacterial performance are provided, and the comfortable experience of a user is remarkably improved.

The utility model relates to the technical field of textile fabrics, and discloses an ice-cool moisture-absorbing and sweat-releasing jean fabric which comprises polyester fiber cotton, a skin-friendly layer is connected to the lower portion of the polyester fiber cotton in a sewing mode, blended yarns are woven in the skin-friendly layer in a warp-weft crossing mode, a nylon elastic piece is arranged above the polyester fiber cotton, and the nylon elastic piece is connected with the skin-friendly layer in a sewing mode. A first waterproof layer is connected to the upper portion of the nylon elastic part in a sewing mode, weft yarns are connected to the upper portion of the first waterproof layer in a sewing mode, warp yarns are woven on the outer walls of the weft yarns in a warp-weft crossing mode, and the warp yarns are connected to the upper portion of the first waterproof layer in a sewing mode. In the utility model, firstly, the cotton blended yarns are uniformly woven on the outer wall of the textile yarns in a staggered manner, so that the problem of poor ventilation and perspiration effects of the traditional fabric is solved, good ventilation and perspiration are achieved, sweat can be quickly evaporated when the fabric is worn, the skin is kept dry and comfortable, stuffiness and moisture are reduced, and the overall wearing comfort is improved.

The vamp with the protective property and the air permeability comprises a vamp body, a plurality of TPU yarns are woven in an interweaving mode to form at least one TPU yarn arrangement layer, the TPU yarns are fixedly connected at the overlapping position in a hot melting press fit mode, and the TPU yarns are arranged on the vamp body. Breathable winding gaps are formed among the woven TPU yarns; a protective layer is compounded on the side, close to the foot, of the vamp body, the protective layer is formed by weaving materials with puncture resistance and cutting resistance, and the protective layer is provided with a breathable grid structure. According to the vamp with the protective property and the air permeability and the shoe, the vamp material with the protective property and the air permeability is adopted for the shoe, the effects of being simple in structure, good in air permeability and having the protective function are achieved, and safe, comfortable and healthy wearing experience is provided for a wearer.

The application discloses a kind of deodorization bacteriostatic casual shoes, belong to casual shoes technical field.It includes casual shoe body, the shoe tongue is integrally arranged in casual shoe body front side, vertical through strip shape zipper strip is sewn in shoe tongue middle part, wherein the zipper strip is engaged with zipper head, insole is padded in the inside of casual shoe body, the present application is provided with zipper strip and zipper head, and the setting of zipper strip and zipper head can open the whole shoe tongue half, so that shoe head part can be unfolded and cleaned and ventilated, after daily use, it can be opened naturally ventilated, avoid shoe head humid and breed bacteria, simultaneously, button female parts are matched and engaged from two sides, can separate the middle part of shoe tongue and stably dock, avoid zipper head being opened downward in daily travel, keep shoe tongue stable and adhere to instep, simultaneously, zipper strip is completely opened, can conveniently take out insole and dry and wash.

The utility model discloses a polycarbonate plate with air permeability, which relates to the technical field of building boards, and comprises a top substrate and a bottom substrate, the bottom of the top substrate is fixedly connected with the top of the bottom substrate, the top of the top substrate is provided with a top air groove, the inner side wall of the top air groove is provided with a side air groove, and the bottom of the bottom substrate is provided with a side air groove. A bottom air groove is formed in the bottom of the top base plate, the top air groove, the bottom air groove and the side air grooves communicate with one another, and a plurality of drainage grooves and vent grooves are formed in the top of the bottom base plate. The polycarbonate plate with the air permeability is provided with the top air groove, the bottom air groove, the side air groove, the vent groove and the drainage groove, when it rains, rainwater enters from the top air groove and flows into the drainage groove to be discharged, and gas enters from the top air groove, then passes through the side air groove and the bottom air groove and finally flows out from the vent groove; according to the structure, the air permeability of the polycarbonate plate can be improved, air circulation is improved, and stuffiness is reduced.

The utility model relates to a kind of air-cooled foot therapy machine, including shell and movement core, wherein: movement core central position is provided with a air passage, air passage is Y-shaped structure, two sides symmetrically are provided with the air outlet towards both feet, the end of air passage is provided with a fan, and the fan corresponds the air inlet slot of shell.The utility model has the characteristics of unique conception, simple structure, good ventilation performance;The gap between the two feet of movement core is used, the air flow is blown out both feet by organically designing air passage, which does not occupy space and can distribute air flow to both feet side using a fan;External air is sucked into by fan, and sent into foot therapy machine, and air pressure is also exchanged to outside using equipment gap, forming circulation, which can effectively take away heat, and also make internal fresh and reduce stuffy.

This utility model discloses an ear-hook earphone and earphone case suitable for wearing on both ears. The ear-hook earphone includes an ear hook and a sound-emitting part and an auxiliary part disposed at the end of the ear hook. The sound-emitting part is provided with a control board and a speaker electrically connected to the control board. When the ear-hook earphone is in the wearing state and is worn correctly, the sound hole of the sound-emitting part on the side near the user's face is facing the user's ear canal, and the touch verification part on the side of the auxiliary part near the user's face is in contact with the user's facial skin. The control board can respond to the user's command to control the corresponding speaker and output audio to the user's ear through the sound hole on the side near the user's face. The ear-hook earphone of this application can make the corresponding speaker output audio through the sound hole near the user when the user wears it on the left and right ears respectively, so as to achieve the purpose of adapting a single earphone to the user's left and right ears.

The invention relates to the technical field of belly supporting belts, and particularly discloses an intelligent belly supporting belt for pregnancy and a monitoring system of the intelligent belly supporting belt. The two sides of the abdomen supporting belt are each provided with a folding and unfolding mechanism, a fixing mechanism is jointly installed between the opposite faces of the two folding and unfolding mechanisms, a sponge cushion is installed on the inner side of the fixing mechanism, shoulder belts are installed at the top ends of the two folding and unfolding mechanisms, and the other ends of the two shoulder belts are installed at the top end of the abdomen supporting belt; a controller is installed in the middle of the outer wall of the fixing mechanism in an embedded mode. An adjusting mechanism; through meshing rotation of a driving gear and an adjusting gear and cooperation with a transmission belt, the two adjusting cylinders drive the two retracting and releasing shafts to rotate correspondingly, then the degree of tightness of the abdomen supporting belt can be automatically adjusted according to changes of the body type of a pregnant woman, it is ensured that the abdomen supporting belt is not too tight or too loose, the abdomen can be effectively supported, and the abdomen supporting effect is good. And unnecessary compression on the fetus can be avoided, so that the use effect of the bellyband is enhanced.

The invention relates to the field of composite nylon knitted fabrics, in particular to a high-elastic double-sided knitted fabric and a preparation process thereof. The invention relates to a preparation process of a high-elastic double-sided knitted fabric. The preparation process comprises the following steps: deoiling gray cloth; the gray cloth is formed by weaving nylon 66 and spandex through a double-sided speed weft knitting circular knitting machine; dyeing the deoiled gray cloth to obtain dyed cloth; drying the dyed cloth, and padding the finishing liquid to obtain padding cloth; the finishing liquid is prepared from polydimethylsiloxane, amino silicon oil, a nonionic surfactant, a polyurethane emulsion, a plant extracting solution and water, and the plant extracting solution is at least prepared from mint, aloe and seaweed; and drying and padding the cloth, and tentering and shaping to obtain the high-elastic double-sided knitted fabric. The fabric has the advantages that the moisture absorption and ventilation effects of the fabric are enhanced, and the fabric is softer and more fit.

The application belongs to the technical field of functional textiles, and discloses a preparation method of a lyocell / hollow polyester filament interwoven fabric with high air permeability in a wet state, which comprises the following steps: one, preparing a single-sided lyocell cover hollow polyester filament single jersey: using a 32G single-sided circular knitting machine, interweaving prepared combed lyocell yarn, FDY hollow polyester filament and spandex filament to obtain a single-sided lyocell cover hollow polyester filament single jersey, and the thread length is 235mm / 100 needles, 120mm / 100 needles and 100mm / 100 needles respectively; two, preventing fibrillation; three, dyeing the hollow polyester filament; and four, dyeing the lyocell. The lyocell / hollow polyester filament interwoven fabric prepared by the application can quickly absorb sweat and still has better air permeability than that in a dry state after absorbing sweat, so that the feeling of stuffiness is reduced, and the wearing comfort of the fabric is improved.

The utility model relates to the technical field of special performance products and composite materials, in particular to a composite material and an absorption article, and the composite material comprises an EPTFE (Expanded Polytetrafluoroethylene) film and a moisture-proof and gas-proof film which are laminated; a through hole is formed in the moisture-proof and gas-proof film; the EPTFE film and the moisture-proof and gas-proof film are bonded and fixed in partial areas; the moisture and gas insulation film is in direct contact with the EPTFE film, or a barrier layer is arranged between the moisture and gas insulation film and the EPTFE film. The composite material provided by the utility model has the advantages of high air permeability and low moisture permeability, so that part of moisture can be discharged from the core body, and the external environment cannot be influenced. In addition, residual liquid in the interlayer space can be sucked back into the absorption layer through the through holes, so that the air permeability of the composite material is kept, and the composite material has good comfort and leakage resistance.

This utility model relates to the field of underwear molded cup technology, specifically disclosing a breathable underwear molded cup, including an underwear molded cup body. The underwear molded cup body is composed of a skin-friendly breathable layer, a three-dimensional support skeleton layer, and an outer shaping layer, arranged in the following order from the inside out: the underwear molded cup body consists of the skin-friendly breathable layer, the three-dimensional support skeleton layer, and the outer shaping layer. The three-dimensional support skeleton layer has a three-dimensional mesh structure and is filled with phase change temperature-regulating microcapsules. An air convection channel is formed between the three-dimensional support skeleton layer and the outer shaping layer. This utility model forms a self-driven air circulation system through a three-stage linkage of rapid moisture wicking by the skin-friendly breathable layer → vapor permeability through the mesh gaps of the three-dimensional support skeleton layer → active heat dissipation through the air convection channel, improving the breathability efficiency by more than 40% compared to traditional molded cups; at the same time, the phase change temperature-regulating microcapsules absorb / release heat when body temperature fluctuates, reducing the duration of stuffiness by 50%.

This utility model discloses a comfortable medical protective mask, including a mask body, a mask surface, and ear loops. The mask body includes a mask surface and two plastic frames symmetrically arranged on both sides of the mask surface. A face support strip, fixedly connected to the mask surface, is arranged parallel to the inner side of both plastic frames. An ear loop is provided on one side of each plastic frame via a mating protrusion, and an adjustment block is installed on the ear loop. A first strap and a second strap are respectively provided at the top of the two ear loops. A buckle is provided at the top of the first strap, and a fixing strip matching the buckle is provided at the top of the second strap. This utility model, by symmetrically arranging two plastic frames on both sides of the mask surface and providing a face support strip fixedly connected to the mask surface parallel to their inner sides, creates a three-dimensional space inside the mask surface when unfolded, providing a more comfortable breathing experience when worn.

The utility model belongs to the sole technical field provides the perspiration and moisture absorption antibacterial composite sole, include: sole body, the sole body includes the slow shock antibacterial layer, slow shock antibacterial layer one side is connected with the sweat absorption layer, the sweat absorption layer is connected with the perspiration layer far from slow shock antibacterial layer one side, the perspiration layer is connected with the antiskid waterproof layer far from sweat absorption layer one side, slow shock antibacterial layer contacts foot, slow shock antibacterial layer is used for providing slow shock and antibacterial, the sweat absorption layer is used for absorbing the perspiration of foot, the perspiration layer is used for promoting the evaporation of perspiration and air circulation, the antiskid waterproof layer is contacted with ground, the antiskid waterproof layer is used for providing antiskid, the utility model discloses through the scientific collocation and reasonable layout of four different function materials, not only has promoted the wearing comfort, still has shown the remarkable superiority in foot health protection, environmental adaptability and safety etc.

The invention relates to a preparation method of mulberry silk and rose fiber interwoven fabric with rose fragrance, which combines a rose fragrance agent with mulberry silk and rose fiber through a specific weaving technology and a treatment process, and aims to overcome the defects of the traditional mulberry silk fabric in the aspects of fragrance durability, wearing comfort and novelty and creativity. The prepared fabric has rich rose fragrance, the fragrance lasting time is long, and the expectation of consumers for the fragrance of the fabric can be met. Meanwhile, the fabric is excellent in softness, glossiness, air permeability, skin touch feeling and the like, and the wearing comfort is remarkably improved. In addition, the method has flexibility and can be adjusted according to different requirements of consumers so as to meet individual requirements.

The utility model relates to the field of medical fixing instruments, in particular to an adjustable cardiac pacemaker postoperative compression fixing structure which comprises an oversleeve and an elastic bandage, the front side of the oversleeve is connected with a chest compression piece, the rear side of the oversleeve is connected with a back connecting piece, the chest compression piece is used for covering dressing at an incision, and the back connecting piece is used for connecting the back connecting piece. The rear end of the elastic bandage is fixed to the back connecting piece, a fixing buckle is arranged on the chest pressing piece, the elastic bandage can penetrate through the fixing buckle, a hook face of a hook-and-loop fastener is arranged on the surface of the front end of the elastic bandage, and a suede face of the hook-and-loop fastener is arranged on the other portion of the surface of the elastic bandage. The compression structure solves the problem that an existing compression structure is common in compression effect.

The utility model discloses a flame -retardant heat -insulation waterproof moisture -permeable fabric, including polytetrafluoroethylene moisture -permeable membrane, first flame -retardant fiber water -jet felt and second flame -retardant fiber water -jet felt, polytetrafluoroethylene moisture -permeable membrane with first flame -retardant fiber water -jet felt between, through first point shape flame -retardant adhesive and stick together, first flame -retardant fiber water -jet felt with second flame -retardant fiber water -jet felt between, through second point shape flame -retardant adhesive and stick together, wherein, second flame -retardant fiber water -jet felt has multiple pinholes of array, to increase the moisture -permeability of fabric. The utility model discloses a flame -retardant heat -insulation waterproof moisture -permeable fabric, polytetrafluoroethylene moisture -permeable membrane, first flame -retardant fiber water -jet felt and second flame -retardant fiber water -jet felt three layer materials and stick together, second flame -retardant fiber water -jet felt has multiple pinholes of array, and the whole fabric heat protection performance (TPP) is good, and the moisture -permeability is high, and has the function of moisture absorption and sweat -releasing.

The utility model relates to the technical field of air direction adjustment, and discloses a multi-direction adjusting air supply device which comprises an air supply assembly used for being installed at an air outlet and supplying air in multiple directions, and four air direction adjusting and controlling units used for controlling the air direction are annularly arranged in the air supply assembly. The wind direction regulation and control unit comprises a plurality of wind direction regulation assemblies used for controlling wind flowing, a transmission assembly used for controlling the swing angles of the multiple wind direction regulation assemblies, a guide assembly used for assisting the transmission assembly to move up and down linearly in the longitudinal direction, and a supporting assembly used for stably installing the guide assembly, the transmission assembly and the wind direction regulation assemblies. The working principle of the multi-direction adjusting air supply device is based on synchronous or independent operation of the four air direction adjusting and controlling units, stable supporting provided by the supporting assembly for each unit, accurate guiding guaranteed by the guiding assembly, power transmission provided by the transmission assembly and air flow direction adjustment achieved by the air direction adjusting assembly, and the multi-direction air supply effect is achieved.

This utility model discloses a non-woven protective round hat, relating to the technical field of non-woven hats. The non-woven protective round hat includes a hat body and a brim. The hat body has a seamless three-dimensional structure with evenly distributed ventilation holes at the top and a ring-shaped support frame on the inner side. The brim extends and widens along its height, comprising an elastic and non-elastic section, which are alternately arranged. A section of hook-and-loop fastener is located at the non-elastic section on the outer surface of the brim, bonded to a hook-and-loop fastener, with one end of the hook-and-loop fastener connected and fixed to the non-woven fabric of the non-elastic section. This utility model employs a segmented elastic design for the brim, an adjustable brim size design, a three-dimensional design for the hat body, and a breathable design, further improving the wearing comfort of the non-woven round hat.

The leg fracture fixing device comprises two arc-shaped plates, a plurality of extending plates are movably arranged at the two ends of each arc-shaped plate, a plurality of first side sliding grooves used in cooperation with the extending plates are formed in the two ends of each arc-shaped plate, and a containing groove is formed in the position, close to an opening, of the inner wall of each first side sliding groove; the end, away from the extension plate, of the abutting plate is rotationally provided with a lead screw, and the end, away from the extension plate, of the lead screw penetrates out of the arc-shaped plate in a threaded mode and is fixedly provided with a hand wheel. In the using process, each extension plate is matched with the two arc-shaped plates to limit the position of the leg fracture, and due to the fact that certain distances exist between the extension plates, air can make direct contact with the skin, the stuffiness feeling is small, and the using experience feeling is good.

The breathable waterproof vamp comprises a vamp base layer and a breathable waterproof layer which are connected with each other, the vamp base layer is formed by weaving a plurality of TPU core-spun yarns in an interweaving mode to form at least one TPU core-spun yarn arrangement layer, and the TPU core-spun yarns are fixedly connected at overlapping positions through hot melting press fit. Breathable winding gaps are formed among the woven TPU covering yarns; the breathable waterproof layer is located on the side, close to the foot, of the vamp base layer and used for preventing water from permeating into the inner cavity of the shoe through the winding gap. According to the breathable waterproof vamp and the shoe, the breathability of the shoe made of the breathable waterproof vamp is kept, water can be effectively prevented from permeating into the inner cavity of the shoe, and the wearing experience of a user is improved.

The utility model discloses a steam nursing device, which belongs to the technical field of steam nursing and is technically characterized by comprising a wearing component and a nursing component. When steam nursing is carried out on the eyes of a patient, the eyeshade can be clamped to the positions of the eyes of the patient firstly, then the position of the eyeshade can be fixed through the fixing assembly, and therefore the eyeshade is prevented from falling off subsequently, and in the nursing period, in order to improve the nursing effect, the eyeshade can be fixed through the fixing assembly. Therefore, the nursing assembly can be arranged on the eyeshade during use, a traditional Chinese medicine bag can be inserted into the clamping groove during use, an evaporation device is arranged on the outer surface of the eyeshade, steam can be generated through the evaporation device, the steam can pass through the traditional Chinese medicine bag, and then the steam containing traditional Chinese medicine ingredients is discharged to the eyes of a patient. Therefore, the eyes of the patient can be nursed.

The invention provides a medical textile material and a preparation method thereof, the medical textile material is composed of an isolation layer, a composite salt coating, an ionized layer and an antibacterial layer, and the preparation method comprises the steps of base material preparation, coating, ionized layer manufacturing, antibacterial layer treatment and assembly testing. The fabric is excellent in the aspects of virus protection, disinfection, breathability and comfort, has wide application potential and is suitable for biological protection requirements in a high-risk environment.

The utility model relates to the technical field of wireless earphones, in particular to a wireless earphone with an acoustic noise reduction structure, which comprises a fixed shell and an outer sleeve, one side of the fixed shell is provided with the outer sleeve, the inner side of the fixed shell is fixedly connected with a noise reduction assembly, one side of the noise reduction assembly is provided with a loudspeaker, and one side of the fixed shell is fixedly connected with an impurity blocking cover. Sound absorption cotton is installed on the inner side of the fixed outer shell, a metal sleeve plate is fixedly connected to the outer side of the fixed outer shell, the noise reduction assembly comprises a first foaming aluminum conical shell, a first porous sound absorption material plate is fixedly connected to the inner side of the first foaming aluminum conical shell, and a silica gel column is fixedly connected to one side of the first foaming aluminum conical shell. Noise can be degraded, the sound quality transmitted to the auditory sense of a worker by the loudspeaker is ensured, meanwhile, the device does not hinder normal circulation of gas, the stuffiness of the device and the ears of the worker is reduced, and the wearing comfort of the device is improved.

The invention relates to the field of daily chemicals, in particular to alkoxy active group terminated modified siloxane and a preparation method thereof. The siloxane molecular structure comprises an ethyoxyl-terminated linear siloxane main chain, a middle amino-containing side chain unit and a methylsiloxane unit. The preparation method comprises the steps of hydrolytic condensation, negative-pressure low-temperature removal, ring opening and end capping and the like, and process parameters are accurately controlled to ensure the product performance. Through the synergistic effect of an amino side chain and an alkoxy end group, the hair quality flexibility, the damage resistance and the moisturizing effect are remarkably improved, meanwhile, the residual risk is reduced, and the shampoo is suitable for large-scale industrial production and has remarkable technical progress and market prospects.