38results about How to "Affects air permeability" patented technology

The invention provides a nano-silver antibacterial shirt fabric. Warp of the fabric is compact spinning cotton yarns CF 14.8 tex; weft yarns are blended yarns 14.8 tex of 48%modal fibers / 48%bamboo pulp fibers / 4%nano-silver fibers; and the warp density is 512yarns / 10cm, and the weft density is 512yarns / 10cm. The invention further provides a preparation method for the nano-silver antibacterial shirt fabric. The method comprises the following steps: a, spinning; b, warp and cheese dyeing: cone loosening, caging filling, feeding into a cylinder, pretreatment, dyeing, aftertreatment, dehydration, drying and cone fastening, wherein the pretreatment is performed at a temperature of 120 DEG C for 30min to 60min, the NaOH utilization amount is 1.4g / L to 1.6g / L, the utilization amount of H2O2 in a concentration of 27.5% is in a range of 4.3g / L to 4.7g / L, the bath ratio during dyeing is 1:10, reactive dyes containing two active groups of vinyl sulfone and monochlorotriazine, the utilization amount of the dyes is in a range of 3g / L to 5g / L, the utilization amount of Na2SO4 is in a range of 10g / L to 60g / L, and the utilization amount of Na2CO3 is in a range of 5g / L to 20g / L; c, weaving: warping, sizing, drafting and weaving the fabric, wherein K-5000 size is used during sizing; and d, after treatment.

The invention provides a sweat stain resisting tidying method of hygroscopic and sweat releasing knit goods. The sweat stain resisting tidying method is characterized by comprising the following process procedures of mild finishing of the knit goods, size mixing, sweat stain resisting processing on front faces of the knit goods, sweat stain resisting detection and stoving. Sweat can be instantly absorbed or volatilized through the hygroscopic and sweat releasing mild finishing of the knit goods; a pigment printing mode is then used for forming a film coating with a plurality of ventilation minuteness air holes on the surfaces of the knit goods, each minuteness hole is smaller than sweat liquid and bigger than sweat molecules of a human body, and the sweat is spread out in a mode of the sweat liquid to enable sweat stains to leave no trace on the surface of clothes. Therefore, the sweat stain resisting tidying method has the effects of sweat stain resistance, the reverse sides of the knit goods after the sweat stain resisting processing can absorb moisture and rapidly dry, the surfaces of the knit goods have the effects of sweat stain resistance, and the knit goods are good in air permeability, can be comfortably wore and are favorable for popularization and use.

The invention discloses a double-resistant polytetrafluoroethylene microporous membrane and a preparation method thereof. The double-resistant polytetrafluoroethylene microporous membrane is prepared through the following steps of: proportionally mixing a polytetrafluoroethylene dispersion resin, double-resistant powder and an extrusion auxiliary together to form an oil-containing base band, degreasing the oil-containing base band and longitudinally stretching the oil-containing base band for the first time; treating the stretched band by using a double-resistant oil soluble emulsion; stretching the band bidirectionally to form the double-resistant polytetrafluoroethylene microporous membrane. The double-resistant polytetrafluoroethylene microporous membrane provided by the invention has the advantages of high filter efficiency, antibiosis and anti-staticelectricity, low running resistance, easy ash removal, resistance to high and low temperatures, resistance to acids and bases, and corrosion resistance.

The invention discloses a three-dimensional nanocomposite adhesive bandage as well as a preparation method and a use method thereof. The three-dimensional wound-protection layer of the adhesive bandage has a curved surface, and the curved surface is complementary to the uneven wound surface and comprises a nanobacterial cellulose frozen-dried membrane and an eletrospun chitosan-containing nanofiber film. The three-dimensional wound-protection layer can carry a part of liquid medicine. When in use, the adhesive bandage fully fits the wound surface, has air permeability, can keep the wound surface wet, has the functions of stop bleeding, inhibiting bacteria, promoting the healing of a wound and preventing the adhesion of the wound surface to the wound dressing and can be used widely. The adhesive bandage can well fit the concave wound surface and the convex wound surface, is applicable to the wet wound surface with many exudates, the dry wound surface which needs to be wetted by the wound dressing and the potential wound surface which needs protection, thereby being an ideal wound dressing.

Soil which is soft, good in water retention and rich in organic matters is suitable for peanut planting. According to the characteristic, a plurality of soil improving agents, such as shell powder, diatomite and Chinese medical stone powder, are compounded with organic fermented matters and then adopted as a coating component of fertilizer particles, chemical mineral components coated with a coating agent prepared mainly from resin are adopted as an inner core, and the resin slowly degrades to form a porous structure and to slowly release the inner mineral elements after the resin enters soil layers, thus avoiding frequent fertilizing. Peanut needs water, but is not water-tolerant, and waterlogging influences permeability, and therefore fine-hole silica gel is added, and the fine-hole silica gel can be used for pump grinding, and can absorb water vapor after entering soil layers. Improved soil is loose, and is beneficial to peanut expanding and growing, thus increasing the yield.

Peanuts can grow well in soil which is loosened and soft, good in water retention property and rich in organic matter, according to the characteristic, multiple soil conditioners such as shell powder, kieselguhr and medical stone powder are compounded with organic fermentation substances to prepare a coating component of fertilizer granules, chemical minerals coated by a coating agent prepared from resin as a main component is used as an internal core, resin can be slowly degraded after entering a soil layer and thus a porous structure is formed to slowly release internal mineral elements, and then frequent fertilization can be avoided; peanuts need a great amount of water but being poor in water resistance, and the air permeability can be affected by waterlogging, so that fine-pore silica gel is added, then pulping can be implemented on one hand, on the other hand, moisture can be absorbed after the fine-pore silica gel enters the soil layer, the improved soil is loosened and is beneficial to expansion growth of peanuts, and the yield can be increased.

The invention discloses a production process of a back piece of a backpack, relates to a backpack and aims to solve the problem of lack of breathability. The technical scheme of the production processof the back piece of the backpack is characterized by comprising steps as follows: S1, Dupont sorona fiber is carded in a thin net state through a roller carder and sent into a net paving machine onstandby, oyster fiber mixed hot-melt short fiber is carded in a thin net state by a roller carder, sent into the net paving machine and paved above sorona fiber, and a fiber net with 10-40 g / m<2> is prepared from the paved net and finally coiled to form a fiber net; S4, an inner-core blank is sent into a hot cutting press and is cut into a required appearance by a hot cutting die of the hot cutting press, and a filling inner core is prepared; and S5, the filling inner core is wrapped with fabric, and the back piece of the backpack can be made. By means of the production process of the back piece of the backpack, the breathability of the back piece of the backpack is effectively improved, so that the sweating capability is improved, and the hidden danger of breeding of bacteria is further reduced.

The invention relates to a bamboo chitosan functional dressing comprising bamboo fibers and chitosan, and a preparation technology for the dressing. The preparation technology comprises the following steps: (1) mixing and opening; (2) combing; (3) lapping; (4) pre-needling, wherein the pre-needling adopts oblique needling, and the needling angle of the oblique needling is 20-30 degrees; (5) needling of composite fiber net after the pre-needling to obtain dressing primary product; (6) pressing of the dressing primary product to obtain the dressing; (7) winding. The bamboo chitosan functional dressing adopts the bamboo fibers as a frame; the chitosan fibers are uniformly distributed on the frame; viscose fibers are utilized to strengthen adhesion; the component fibers form an integrative non-woven fabric structure without being layered by needling; the non-woven fabric structure is firmer, high in intensity and more durable; the chitosan fibers and the bamboo fibers are intersected complexly, and permeate mutually; the efficacy function of the fibers is more permanent; medicine smeared on the inner surface of a dressing in a conventional manner is easy to drop or be rubbed off; the dressing has no burr on edge.

The invention provides a wearable garment sensor and a preparation method and application thereof. The garment sensor comprises a fabric layer, a first electrode layer, a dielectric layer and a secondelectrode layer in sequence from bottom to top; the dielectric layer has a porous structure, and the pore wall of the dielectric layer is loaded with an ionic liquid. The garment sensor has sensing,waterproofing, ventilation and heat control performance, and can not only monitor the movement of the human body such as fingers, elbow bending, leg bending, walking and running in real time, but alsodetect weak physiological signals of the human body such as pulse, heartbeat and breathing.

The peanut planting is suitable for soil with soft soil quality, favorable water retention property and abundant organic matters. According to the characteristics, multiple soil conditioners, such as shell powder, diatomite, medical stone powder and the like are adopted, and organic fermentation substances are compounded and used as the coating component of the fertilizer granules. The inside core is composed of chemical mineral constituents coated by a coating agent mainly prepared from the resin; the resin is slowly degraded after entering the soil layer to form a porous structure and slowly release the inside mineral elements, thereby avoiding frequent fertilizer application. Peanuts need water, but are not tolerant to water. The over waterlogging influences the air permeability, so Kiselgel A is added; and the Kiselgel A can be used for defibrination, and can adsorb water after entering the soil layer. The improved soil is loose, and is beneficial to expansion and growth of peanuts, thereby enhancing the yield.

The invention discloses water-based environment-friendly paint used for a lost foam casting mold for brass casting and a preparation method of the water-based environment-friendly paint. The water-based environment-friendly paint is prepared from, by weight, 100 parts of refractory powder, 4-6 parts of sodium bentonite, 0.3 part of CMC, 6-9 parts of silica sol, 0.5 part of polyacrylamide, 0.2 partof xanthan gum, 60-80 parts of water, 1-5 parts of a wetting dispersant, 0.2-0.8 part of a defoaming agent, and 0.1-1 part of a corrosion remover. According to the water-based environment-friendly paint used for the lost foam casting mold for brass casting and the preparation method of the water-based environment-friendly paint, porous glass ceramic is used for preparing the refractory powder sothat the gas-liquid permeability of a coating can be effectively improved; water is used as carrier liquid and does not contain any hazardous substance, and the refractory powder is easy to suspend and good in coating performance, so that the phenomenon of sand adhesion on the surface of a casting can be obviously reduced; and after the paint is dried, the coating is smooth, flat, free of brush marks, cracks and bubble defects and high in strength.

The invention provides a sweat stain resisting tidying method of hygroscopic and sweat releasing knit goods. The sweat stain resisting tidying method is characterized by comprising the following process procedures of mild finishing of the knit goods, size mixing, sweat stain resisting processing on front faces of the knit goods, sweat stain resisting detection and stoving. Sweat can be instantly absorbed or volatilized through the hygroscopic and sweat releasing mild finishing of the knit goods; a pigment printing mode is then used for forming a film coating with a plurality of ventilation minuteness air holes on the surfaces of the knit goods, each minuteness hole is smaller than sweat liquid and bigger than sweat molecules of a human body, and the sweat is spread out in a mode of the sweat liquid to enable sweat stains to leave no trace on the surface of clothes. Therefore, the sweat stain resisting tidying method has the effects of sweat stain resistance, the reverse sides of the knit goods after the sweat stain resisting processing can absorb moisture and rapidly dry, the surfaces of the knit goods have the effects of sweat stain resistance, and the knit goods are good in air permeability, can be comfortably wore and are favorable for popularization and use.

The invention discloses a greenhouse for vegetable planting. The greenhouse comprises a greenhouse frame and a film fixedly arranged on the top of the greenhouse frame. Two standing plates are vertically and fixedly arranged at the front ends of the left side face and the right side face of the greenhouse frame respectively. A smooth guide rail is horizontally arranged between the left standing plate and the right standing plate, a rack is horizontally arranged between the left standing plate and the right standing plate, the smooth guide rail is movably sleeved with a sliding sleeve, and a motor is fixedly arranged on the upper surface of the sliding sleeve. An output shaft of the motor is fixedly provided with a gear meshed with the rack, and a supporting plate is horizontally and fixedly arranged on the upper surface of the motor. A draught fan is fixedly arranged on the supporting plate, a support is fixedly arranged on the back end face of the supporting plate. A metal pipe is horizontally and fixedly arranged in the middle of the support. The front end of the metal pipe is fixedly connected with the air inlet of the draught fan, a plurality of dust suction openings are vertically installed in the metal pipe from front to back. Two transverse plates are horizontally and fixedly arranged at the left end and the right end of the support respectively, and each transverse plate is sleeved with a cloth sleeve. The greenhouse has the advantages that cleaning is convenient and physical strength is saved.

The invention discloses a cordyceps militaris mycelium solid culture medium. The solid culture medium comprises the following components in percentage by weight: 30%-50% of main materials with the particle sizes less than or equal to 2mm, 0.1%-15% of livestock, 0.1%-15% of vegetables, 0.1%-15% of saccharides and the balance of water, wherein the main materials are non-glutinous cereals or beans, the livestock and the vegetables are auxiliary materials, and the saccharides are monosaccharides or disaccharides. The invention further simultaneously discloses a preparation method of the cordyceps militaris mycelium solid culture medium and a food material-based cordyceps militaris mycelium solid culture method utilizing the solid culture medium. By taking the food materials as the main materials and the auxiliary materials, the solid culture medium has relatively large specific surface area and good loosening breathability, and good nutritional conditions and physical space can be provided for the growth of cordyceps militaris mycelia.

The invention discloses a paint tail gas treatment device, which comprises a tank body, a filter chamber is opened inside the tank body, and an air intake pipe is arranged through one side of the tank body, and a drying device is fixedly installed inside the filter chamber and above the air intake pipe. The inside of the filter chamber and above the drying box is provided with a filter device, the top of the inner wall of the filter chamber is provided with a fan, and one side of the tank and the bottom of the drying box are provided with a water inlet pipe, and the front of the drying box is opened There is a groove, and a storage box is slidably installed inside the groove, and a dry bag is placed in the inside of the storage box. In the present invention, the tank body is provided, and the waste gas enters the inside of the tank body through the air inlet pipe, and through the cooperation of the water inlet pipe, the drying box and the filter device, the waste gas is sequentially treated by filtering and removing impurities, drying the waste gas and filtering the waste gas, thereby Make the paint waste gas be treated cleanly, and reduce the pollution of paint waste gas to the environment.

A multifunctional travel hat comprises a hat brim and a hat body, wherein the hat body comprises an outer layer and an inner layer; a hollow interlayer is arranged between the outer layer and the inner layer; the outer layer consists of a plurality of longitudinal hat sheets; the two adjacent hat sheets are partially overlapped; an inclined convex strip is arranged in the overlapped area of the hat sheets; the top of the convex strip is stuck with the adjacent hat sheets; a clearance between the adjacent convex strips forms an inclined ventilating slot; the inner layer adopts a netted structure; the hat brim consists of a fixed hat brim and a moveable hat brim; the movable hat brim is slidably installed on an annular sliding rail of the hat body; the outer layer of the hat body is not in contact with the head directly, so that regardless of the high hat body temperature, hair on the head is not damaged by heat; the inclined ventilating slot has a ventilating function, so that air convection inside the hat body can be realized, the convecting air can bring away heat on the head, and the temperature of the head is reduced; rainwater can be effectively prevented from entering the hat body to wet the hair on the head, so that the multifunctional travel hat has a rain-proof function; and the movable hat brim can be unfolded, so that that the unfolded multifunctional travel hat has a better sunlight-shading and rainwater-shading effect.

The invention relates to the field of agricultural harvesting machines, in particular to a paris polyphylla seed harvester. Light outer petals are separated from paris polyphylla seeds under suction force of a fan and blowing thrust of an air blower; the paris polyphylla seeds harvested in rainy days are dried by hot air of the air blower and then are easy to store; an air screen is arranged on one side, of a seed bin, close to the air blower; thus, the paris polyphylla seeds and the outer petals are separated by the air blower while the paris polyphylla seeds are dried and jamming at a seed collection port caused by the paris polyphylla seeds in the seed bin is avoided. According to the paris polyphylla seed harvester, the paris polyphylla seeds and the outer petals are separated completely during picking of the paris polyphylla seeds and the outer petals cannot attache onto surface of soil after being chopped, so that damage by insects can be reduced, air permeability of soil is maintained, primary drying of the paris polyphylla seeds is achieved, and jamming at the seed collection port is avoided.

The invention provides a prefabricated substation with a protective device, which comprises a box body, a roof and a box door, the inner side of the roof is provided with an inner cavity, the inner sides of the box body and the box door are welded with partition plates, the inner side of the box body is provided with a transformer, the top and the bottom of the transformer are welded with support columns, and the support columns are welded with the protective device. Clamping sleeves are welded to the top and the bottom of the box body, first springs sleeve the outer sides of the supporting columns, an air duct is welded to the top of the box body, and a first draught fan is installed on the inner side of the air duct through bolts. According to the prefabricated substation with the protection device, the heat dissipation efficiency in cloudy and rainy days can be guaranteed, water is prevented from entering the box body, and the service life of the prefabricated substation is prolonged. Heat dissipation safety of a transformer is guaranteed, noise is greatly attenuated in the box body, noise is prevented from being transmitted out, quiet work of a transformer station is guaranteed, life of surrounding personnel is facilitated, moisture and dust on the net belt are blown off, air permeability of the net belt is guaranteed, heat dissipation efficiency is guaranteed, and the box is suitable for voltage conversion and power transmission.

The invention discloses a textile air permeability tester, which comprises a mounting base, a processing table is fixedly connected to the middle position of the top of the mounting base, a ventilation slot is opened in the middle position of the processing table, and the upper surface of the processing table is A sealing groove is provided on the outer edge of the vent hole, and the top of the installation base is fixedly connected to the limit housing relative to the upper position of the processing table. The top of the limit housing is fixedly equipped with a hydraulic cylinder. The bottom extends to the inner cavity of the limit housing, and a sealing cover is fixedly installed on the bottom. When the spur rack moves upward, it drives the first gear to deflect counterclockwise, and then drives the pointer to deflect on the outer wall of the dial. Since the sealing cover and the limit housing are both transparent structural materials, by directly observing the deflection angle of the pointer on the outer wall of the dial The air pressure value entering the inner cavity of the sealed cover can be directly read, and then the air permeability of the fabric can be obtained indirectly.

The invention relates to the field of disposable hygienic products, in particular to a production method of an absorbent product with a breathable waistline. A clothing layer making method comprises the following steps: (a) defining that the circumferential length of the clothing layer, at a waist opening, of the absorbent product is 2L, conveying a first non-woven fabric in a continuous conveyingmode, applying a streak of sealing adhesive and two to four streaks of bonding adhesive on the two transverse sides of the upper surface of the first non-woven fabric respectively at an interval of the length L in the longitudinal direction, wherein the longitudinal length of the sealing adhesive is 30-50 mm, and the transverse width of the sealing adhesive is X; the streaks of bonding adhesive are uniformly arranged in the longitudinal direction of the clothing layer, the longitudinal length of each streak of bonding adhesive is 5-20 mm, and the transverse width of each streak of bonding adhesive is Y, and Y-X equals -10-10 mm. The production method is applied to the production of hygienic products, and the problem is solved that the waistlines of existing hygienic products are poor in air permeability.

The invention belongs to the technical field of non-woven fabrics, in particular to a medical sanitary non-woven fabric. The fabric comprises a surface layer, an intermediate layer and a contact layer, wherein the surface layer is arranged above the intermediate layer; the contact layer is arranged under the intermediate layer; the surface layer is a non-woven fabric; the contact layer is a non-woven fabric; the intermediate layer is high-molecular water-absorbing resin. The medical sanitary non-woven fabric has a simple structure, and the production process is simple and implementable; besides, the use of an adhesive is omitted, the production cost is effectively reduced, strength of the product is improved by pressed lines formed by ultrasonic pressing, dislocation and aggregation of composition of the product can be avoided, and performance of the product is ensured.

The invention discloses an antibiotic disinfectant for garment fabric and a preparation method of the antibiotic disinfectant. The antibiotic disinfectant is prepared from, by weight part, nano-silver loaded SiO2 particles, polylactic acid, sodium carboxymethyl cellulose, tebuconazole, difenoconazole, choline chloride, chitosan propionic acid, bromo-geramine, vermiculite powder, nitroethane, a coupling agent, an antioxidant, a dispersing agent, surfactant, isopropyl alcohol and deionized water. The antibiotic disinfectant is high in safety, the broad-spectrum antibacterial property and excellent laundering durability are achieved, no bad influence exists on whiteness, color light, strength, hand feeling and air permeability of the fabric, the price is low, use is convenient, the antibiotic disinfectant is suitable for antibiotic and odor resistant finish of fabric such as down, cotton, silk, wool, polyester cotton and viscose, the hand feeling is fluffy and soft, composition design is reasonable, the production cost is low, and the economic benefit is good.

The invention belongs to the technical field of non-woven fabric products and in particular relates to a waterproof, breathable and bacteriostatic compound non-woven fabric and a preparation method and application thereof. The preparation method comprises the following steps of mixing and fusing polyacrylonitrile, polyvinylidene fluoride, stuffing and a water soluble pore-foaming agent; and then carrying out spraying by a spinneret plate, air flow drafting, net forming, hot-pressing bonding and water leaching to remove the pore-foaming agent to obtain the waterproof, breathable and bacteriostatic compound non-woven fabric, wherein the stuffing is prepared from raw materials: a zinc oxide- tourmaline compound, an amine-terminated fluorine-containing polymer and 1-allyl-1-3-methylimidazole tetrafluoroborate. The non-woven fabric has good waterproof and breathable properties and is excellent in antibacterial property.

The invention discloses a pair of light and ultrathin VR hypnotic glasses and particularly relates to the technical field of wearable equipment. The pair comprises a shell, wherein a shading sheet anda glasses body are fixedly mounted in an inner cavity of the shell; the outer wall of the glasses body is fixedly connected with a fixing frame; the fixing frame is a copper heat conduction component, the two sides of the fixing frame are fixedly connected with heat absorption pads, the heat absorption pads are fixedly connected with the two sides of an inner cavity of the shell, a plurality of ventilation holes are formed in the positions, corresponding to the heat absorption pads, of the top and the bottom of the shell, and heat conduction columns are fixedly connected to the tops of the heat absorption pads. According to the invention, the shell, the air cushion ring, the silica gel gasket and the heat dissipation fins are arranged; the working area and the wearing area are isolated through the air cushion ring, compared with the prior art, the wearing and immersion type experience is greatly improved, the wearing comfort in the hypnotic state is effectively improved, and the use requirement is met.

The invention relates to a thermosensitive color-changing spun yarn manufacturing method which comprises the following manufacturing steps: S1, mixing polyester and a corn fiber polymer, and performing melt spinning by adopting a hollow spinning nozzle to obtain hollow fibers; s2, when the hollow spinning nozzle is used for spinning, a mixture of thermosensitive reversible color-changing microcapsules and ethanol steam is sprayed to the inner walls and the outer walls of hollow fibers respectively, and hollow thermosensitive color-changing yarn is obtained after stretching and shaping; and S3, combining and winding a plurality of hollow thermosensitive color-changing yarns, rotationally winding the hollow thermosensitive color-changing yarns together through steam flow sprayed by a steam nozzle, and winding and twisting to obtain the thermosensitive color-changing spun yarns. The thermosensitive reversible color-changing microcapsules and the ethanol steam are sprayed on the surfaces of the inner wall and the outer wall of the hollow fiber, the fiber in the obtained hollow thermosensitive color-changing yarn is fully combined with the thermosensitive reversible color-changing microcapsules, the thermosensitive color-changing effect of the hollow thermosensitive color-changing yarn can be maintained, and the hollow thermosensitive color-changing yarn still keeps good heating capacity after being washed for multiple times.

The invention discloses an automatic spraying assembly line based on a metal covering protective layer and capable of transversely moving and rotatably swinging. The automatic spraying assembly line structurally comprises a feeding object stage, a transverse moving and rotatably swinging machine frame, a human machine interface board, an axle wheel top cover groove, a distribution motor box, a conveyor belt plate box and a finished storage cabinet. According to the automatic spraying assembly line, the cooperation of the transverse moving and rotatably swinging machine frame and the axle wheeltop cover groove is realized, the arc surface spraying operation is carried out through the bending rotary swinging of rotary brush plates in cooperation with a track, and thus the paint spraying ofthe metal covering protective layer carries out one-step in-place operation; and the spraying rotary brush plates and hoisting clamp seats are combined into a bidirectional clamping plate for sprayingthe sliding and brushing metal surface of the front end and the rear end of the bidirectional clamping plate, the vertical metal surface is transferred back along the arc surface to form a rotatableswinging sweeping effect, and residual paint liquid bonding the surface forms a sieve brush cleaning effect after a rotary propeller wind wheel band is convoluted, so that liquid drops are rapidly slipped off, the quality and key effect of the single-side protective layer at the later stage is facilitated, the super-thin homogeneous processing of the paint surface is also facilitated, and the production line spraying qualification rate is improved.

The invention discloses a battery diaphragm. The battery diaphragm comprises a polyolefin porous membrane layer and a polyimide porous membrane layer, the polyimide porous membrane layer is an impregnated polyimide base membrane, the puncture strength of the polyimide porous membrane layer is 0.68-3 N, and the tensile strength of the porous diaphragm in the MD direction is two times greater than that of the polyimide base membrane; and thebattery diaphragm further includes analuminum oxide coating and an adhesive layer which are located between the polyimide porous membrane layer and the polyolefin porous membrane layer, and the polyolefin porous membrane layer and the polyimide porous membrane layer are compounded through the aluminum oxide coating and the adhesive layer.

The invention discloses a production process of a back piece of a backpack, relates to a backpack and aims to solve the problem of lack of breathability. The technical scheme of the production processof the back piece of the backpack is characterized by comprising steps as follows: S1, Dupont sorona fiber is carded in a thin net state through a roller carder and sent into a net paving machine onstandby, oyster fiber mixed hot-melt short fiber is carded in a thin net state by a roller carder, sent into the net paving machine and paved above sorona fiber, and a fiber net with 10-40 g / m<2> is prepared from the paved net and finally coiled to form a fiber net; S4, an inner-core blank is sent into a hot cutting press and is cut into a required appearance by a hot cutting die of the hot cutting press, and a filling inner core is prepared; and S5, the filling inner core is wrapped with fabric, and the back piece of the backpack can be made. By means of the production process of the back piece of the backpack, the breathability of the back piece of the backpack is effectively improved, so that the sweating capability is improved, and the hidden danger of breeding of bacteria is further reduced.

The transport belt is made of an air permeable cloth material containing synthetic filament in the fiber strand (2) guidance portion and a static reduction substance.

A multifunctional travel hat comprises a hat brim and a hat body, wherein the hat body comprises an outer layer and an inner layer; a hollow interlayer is arranged between the outer layer and the inner layer; the outer layer consists of a plurality of longitudinal hat sheets; the two adjacent hat sheets are partially overlapped; an inclined convex strip is arranged in the overlapped area of the hat sheets; the top of the convex strip is stuck with the adjacent hat sheets; a clearance between the adjacent convex strips forms an inclined ventilating slot; the inner layer adopts a netted structure; the hat brim consists of a fixed hat brim and a moveable hat brim; the movable hat brim is slidably installed on an annular sliding rail of the hat body; the outer layer of the hat body is not in contact with the head directly, so that regardless of the high hat body temperature, hair on the head is not damaged by heat; the inclined ventilating slot has a ventilating function, so that air convection inside the hat body can be realized, the convecting air can bring away heat on the head, and the temperature of the head is reduced; rainwater can be effectively prevented from entering the hat body to wet the hair on the head, so that the multifunctional travel hat has a rain-proof function; and the movable hat brim can be unfolded, so that that the unfolded multifunctional travel hat has a better sunlight-shading and rainwater-shading effect.