11652 results about "Nonwoven fabric" patented technology

The invention relates to the technical field of non-woven fabric production monitoring, and particularly discloses an intelligent monitoring method and system for a high-performance fiber non-woven fabric production line. The method mainly comprises the steps of obtaining a data set of a non-woven fabric production line; the fiber uniformity in the fiber image is calculated, whether the fiber uniformity belongs to a preset interval or not is judged, if not, the fiber putting speed, tension, temperature and humidity of the module area are input into a prediction model, and the fiber prediction uniformity in the specified time in the future is obtained; judging whether the fiber prediction uniformity belongs to a preset interval or not; and adjusting the fiber feeding speed and tension of the module area based on the analysis processing result. According to the method, the change trend of the fiber uniformity can be quickly identified and predicted, potential parameter anomalies can be identified in advance, production management personnel can take preventive measures before problems occur, meanwhile, the calculation amount can be effectively reduced, adjustment measures can be implemented more quickly, and therefore the production efficiency and the product quality are improved.

The invention relates to a nicotine bag absorbed through oral mucosa and a preparation method of the nicotine bag. The nicotine bag comprises nicotine particles, at least one blasting bead containing liquid and a non-woven bag. The nicotine particles and the blasting beads are packaged in the non-woven fabric bags, and the number of the blasting beads contained in each non-woven fabric bag is 1-3. When the nicotine particles are dry particles, the particle size is 1-1000 microns, and the water content range is 1-10% (W / W); when the particles are wet particles, the particle size is 1-1000 microns, and the water content range is 5-15% (W / W); when the particles are oily particles, the particle size is 1-1000 microns, and the moisture content range is 1-10% (W / W); when the particles are pellets, the particle size is 30-2500 microns, and the water content range is 1%-10% (W / W). The nicotine bag capable of being absorbed through the oral mucosa can rapidly and continuously release nicotine and has a long shelf life.

The invention relates to the technical field of composite fiber non-woven fabric manufacturing, in particular to a composite fiber non-woven fabric tensile property testing device which comprises a base, and an n-shaped support and a limiting sliding way located under the horizontal section of the n-shaped support are fixedly installed on the upper end face of the base. And a stretching mechanism for stretching the composite fiber non-woven fabric front and back is arranged on the limiting slide way. The tensile property test of the composite fiber non-woven fabric is completed by adopting an integrated operation model of stretching, twisting and extruding, the test reliability is improved by adopting a fixing mode of combining clamping of upper and lower cambered surfaces with matching of a rubber plate, a convex block and a groove, and meanwhile, the tensile property of the composite fiber non-woven fabric is improved through plane stretching, twisting and plane stretching tests after twisting as well as downward extruding and stretching of a middle section. The composite fiber non-woven fabric tensile property testing device can simulate complex stress conditions possibly faced by the composite fiber non-woven fabric in practical application, so that the tensile property of the composite fiber non-woven fabric in multiple stress states is comprehensively evaluated, multiple testing modes are realized on a single device, and the overall testing efficiency is improved.

A fireproof magnesium oxide board is prepared by mixing the following raw materials, the raw material names and weight parts are as follows: 80-100 parts of magnesium oxide; 20-30 parts of anhydrous magnesium chloride; 10-20 parts of modified expanded vermiculite foaming agent; 20-30 parts of aluminum silicate fiber; 5-10 parts of sawdust; 10-15 parts of fly ash; 8-12 parts of glass magnesium board crushed powder; 1.5-5 parts of non-woven fabric; 10-20 parts of water; wherein the modified expanded vermiculite is prepared by the following steps: (1) Vermiculite is incompletely expanded and calcined; (2) acrylic acid monomer, sodium hydroxide, acrylamide monomer, initiator potassium persulfate, crosslinking aid pentaerythritol polyglycidyl ether, incompletely expanded vermiculite, and water are taken, stirred evenly and ultrasonically dispersed to obtain a first reaction solution, which is placed in a reactor for reaction to obtain a gel material; (3) the gel material is preliminarily crushed and dried, and then further crushed in a ball mill to obtain a fire-resistant expanded vermiculite with water absorption performance.

The invention relates to a non-woven fabric surface quality image recognition method and system, and belongs to the technical field of image data processing, and the method comprises the following steps: S1, collecting an original image of the surface of a non-woven fabric under a uniform illumination condition; s2, preprocessing the original image; s3, performing multi-scale texture analysis on the optimized image, extracting structural features of the surface of the non-woven fabric, and performing wavelet transform decomposition to obtain high-frequency detail information; s4, judging whether surface defects exist or not by utilizing a pre-trained defect classification model based on the structural features and the high-frequency detail information; s5, if the defect is detected, calculating the area proportion of the defect area, comparing the area proportion with a preset threshold value, and if the area proportion exceeds the preset threshold value, judging that the non-woven fabric is an unqualified product; if no defect is detected, judging that the non-woven fabric is a qualified product; s6, outputting a detection result, wherein the detection result comprises a defect position and a defect type; the non-woven fabric surface detection device has the beneficial effect of improving the non-woven fabric surface detection quality.

The invention relates to the field of disposable hygienic products, in particular to a high-diffusion baby paper diaper and a preparation method thereof.The prepared baby paper diaper has the advantages of being good in flow guide effect and high in absorption efficiency. The absorption core layer comprises a top layer non-woven fabric, a middle non-woven fabric, a bulky non-woven fabric, a bottom layer non-woven fabric, a wood pulp fiber layer, a first absorption material layer and a second absorption material layer, the first absorption material layer comprises first polymer water-absorbent resin particles and first wood pulp fibers, and the second absorption material layer comprises second polymer water-absorbent resin particles. The second absorbing material layer is arranged between the bulky non-woven fabric and the bottom layer non-woven fabric, part of the second macromolecule water-absorbent resin particles on the second absorbing material layer are embedded in pores of the bulky non-woven fabric, and the first absorbing material layer is arranged between the bulky non-woven fabric and the middle non-woven fabric. And a part of the first high-molecular water-absorbent resin particles on the first absorbing material layer are embedded in pores of the bulky non-woven fabric.

A nonwoven fabric comprises a first surface, a second surface, and a visually discernible pattern on at least one of the first and second surfaces. The visually discernible pattern has a regular, repeating pattern of three-dimensional features. Each of the three-dimensional features define a microzone comprising a first region and a second region. The first and second regions having a difference in values for an intensive property. The first surface has a TS7 value in the range of about 1 dB V2 rms to about 15 dB V2 rms. The second surface has a TS7 value in the range of about 1 dB V2 rms to about 15 dB V2 rms. A ratio of the TS7 value of the first surface to the TS7 value of the second surface is in the range of about 1 to about 3.

The invention provides a PVDF (Polyvinylidene Fluoride) nanofiltration membrane constructed on the basis of microwave-enhanced bridging interfacial polymerization as well as a preparation method and application of the PVDF nanofiltration membrane. The method comprises the following steps: reacting PVDF powder with an organic alkali to prepare a modified film-forming solution, blade-coating the modified film-forming solution on a non-woven fabric supporting layer, placing the non-woven fabric supporting layer in an ethanol-water or methanol-water coagulating bath, and preparing a PVDF supporting film by virtue of assistance of an ice template; weighing the functionalized nano material and an amino silane coupling agent, performing ultrasonic dispersion, and adding a catalyst for reaction to obtain dispersion liquid; immersing a PVDF support membrane into the dispersion liquid to obtain a modified membrane; immersing the modified membrane into an aqueous solution containing an amine monomer and an organic solution containing an acyl chloride monomer, and carrying out microwave radiation. The interface reaction rate and selectivity are enhanced through the microwave excitation effect, and meanwhile, the hydrophilicity and reaction activity of the PVDF base membrane are cooperatively regulated and controlled, so that the separation efficiency and the anti-pollution capacity of the membrane are remarkably improved. The obtained PVDF nanofiltration membrane has high flux, high selectivity and excellent structural stability, and is suitable for efficient purification and resource recovery application in a complex water system.

The invention relates to the field of disposable hygienic products, in particular to a paper diaper with a fluffy non-woven fabric core body of a net structure and a preparation process of the paper diaper, and mainly solves the problems that in the prior art, macromolecular water-absorbent resin particles of an online water-absorbent paper core body are difficult to enter fluffy non-woven fabric, and the strength is poor. The paper diaper body comprises a liquid-permeable surface layer, an absorption core layer and a liquid-tight bottom layer which are sequentially stacked from top to bottom; the absorption core layer comprises a first fluffy non-woven fabric, a second fluffy non-woven fabric compounded on the lower surface of the first fluffy non-woven fabric and macromolecular water-absorbent resin particles laid on the upper surface of the first fluffy non-woven fabric; at least two material storage areas are arranged on the first fluffy non-woven fabric side by side in the transverse direction, holes are punched or embossed on the first fluffy non-woven fabric in each material storage area, and the macromolecular water-absorbent resin particles comprise first macromolecular water-absorbent resin particles which are distributed in each material storage area.

The invention relates to the technical field of non-woven fabrics, in particular to a production process of a functional fiber woven non-woven fabric body, the non-woven fabric body comprises a non-woven fabric base body, middle layers are arranged on the upper portion and the lower portion of the non-woven fabric base body, and outer layer bodies are arranged on the outer sides of the middle layers; the middle layer is compounded with the upper part and the lower part of the non-woven fabric base body through polyurethane glue, and the dosage of the polyurethane glue is 20g / m < 2 >; the non-woven fabric body is formed by mutually matching a non-woven fabric base body, a middle layer and an outer layer body, the non-woven fabric base body is formed by weaving first modified spandex fibers and polyester fibers, the middle layer is formed by interweaving second modified polyester fibers and hemp fibers, and the outer layer body is formed by spraying an outer layer agent. The product is excellent in wear resistance, stain resistance, heat preservation and breaking strength, remarkable in comprehensive coordination effect and excellent in washing resistance and ultraviolet stability resistance.

The invention relates to the technical field of antibacterial non-woven fabrics, and discloses an intrinsic antibacterial non-woven fabric and a preparation method thereof.The intrinsic antibacterial non-woven fabric is prepared by adopting a dip-coating method and by soaking a non-woven fabric in antibacterial slurry, taking out the non-woven fabric for drip drying and then drying the non-woven fabric to constant weight; wherein the antibacterial slurry is prepared by compounding antibacterial polyol with a synergistic antibacterial effect, nano titanium dioxide modified by a coupling functional phenolic hydroxyl Schiff base type antibacterial monomer and a branched antibacterial monomer. According to the intrinsic antibacterial non-woven fabric, the technical problems that in the prior art, an antibacterial agent is large in toxicity, prone to loss and insufficient in antibacterial spectrum coverage range are solved, and the intrinsic antibacterial non-woven fabric can also be applied to the field of filtering materials, the field of medical treatment and public health and the field of textile materials and has the beneficial technical effects of inhibiting bacterial growth and guaranteeing sanitation and safety.

Disclosed are a high-barrier inflatable cushion and a preparation process therefor, which related to the technical fields of high-barrier inflatable cushions. The preparation process includes the following steps: material feeding, heating, vacuum counter-pressure molding, spray cooling, air cooling and drying, die-cutting, and thermal bonding. The high-barrier inflatable cushion comprises an airbag forming material and an airbag base material. The airbag forming material is prepared by laminating a TPU-EVOH composite with Lycra fabric, the TPU-EVOH composite has a total thickness of 0.4-0.8 mm, and the Lycra fabric has a gram weight of 150-230 g / m2. The airbag base material is prepared by laminating the TPU-EVOH composite with non-woven fabric, the TPU-EVOH composite has a total thickness of 0.1-0.3 mm, and the non-woven fabric has a gram weight of 60-80 g / m2.

The present invention relates to an electrospun fiber, a process for preparing the same, a nonwoven fabric comprising the electrospun fiber, as well as corresponding uses and articles. The inventive electrospun fiber comprises a polymer, a surface-reacted calcium carbonate and a pharmaceutically or nutraceutically active ingredient, wherein at least a part of the pharmaceutically or nutraceutically active ingredient is present within the pores of the surface-reacted calcium carbonate. The inventive fibers may be used e.g. in yarns, transdermal patches, intrabuccal patches, implantable textiles, wound dressings and / or medical tapes.

The invention provides a leakage-proof load-bearing non-woven fabric hand bag and a manufacturing process, and relates to the technical field of non-woven fabric hand bag manufacturing. A multi-layer composite structure design is constructed, and a layered non-woven fabric hand bag manufacturing technology based on outer layer protection, middle functions and inner layer load bearing is provided; on this basis, the process steps of vacuum adsorption permeation, differential cooling and the like of the high-porosity PET needle-punched non-woven fabric and the overheat melting PLA material are introduced, and the needle-punched density, the PLA melting temperature, the vacuum degree, secondary heating and the cooling rate of the bent position / non-bent position are strictly controlled, so that PLA is fully permeated in PET fiber pores, and the local rigidity is directionally enhanced; the comprehensive performance of the leakproof load-bearing non-woven fabric hand bag and the manufacturing process hand bag is obviously improved.

The invention relates to the technical field of production of automobile roofs, and particularly discloses a fiber-reinforced thermoplastic composite automobile interior ceiling and a preparation method thereof. A fiber-reinforced thermoplastic composite material automotive interior ceiling comprises a base material and a fabric, and the base material sequentially comprises a bottom layer non-woven fabric, a first adhesive film, a blend fiber felt and a second adhesive film from bottom to top; the blend fiber felt is made of reinforced fibers and thermoplastic fibers through a non-woven process. The preparation method comprises the following steps of: preparing the base material by a dry method, forming the framework and compounding the fabric by using a set of mold to obtain a ceiling prototype, and then punching by using a cold mold and integrally curling and covering the base material and the fabric of the skylight opening to obtain the ceiling. The automobile interior ceiling made of the fiber-reinforced thermoplastic composite material has excellent dimensional stability and is more low-carbon and environment-friendly, and raw material leftover materials generated in the production process and products produced after the life cycle is ended are easy to recycle.

The utility model relates to a non-woven fabric roll transfer device which comprises a vehicle body, a non-woven fabric roll placing box body and a box body turnover mechanism, the non-woven fabric roll placing box body is arranged on the top of the vehicle body, a V-shaped placing groove is formed in the non-woven fabric roll placing box body, and a non-woven fabric roll to be transferred is placed in the V-shaped placing groove. One side edge of the non-woven fabric placing box body is hinged to the side edge of the top of the trolley body, the box body turnover mechanism is arranged on the trolley body and connected with the non-woven fabric roll placing box body, and the non-woven fabric roll in the V-shaped placing groove is released by driving the non-woven fabric placing box body to turn over through the box body turnover mechanism. According to the non-woven fabric roll transfer device, stable transfer and automatic unloading of non-woven fabric rolls are achieved, the labor intensity of workers is reduced, and the transfer efficiency is improved.

The invention discloses a biodegradable sanitary towel with polylactic acid as a main component. The biodegradable sanitary towel comprises a degradable core body, and the degradable core body comprises a surface layer, an absorption core layer and a bottom layer; the surface layer is a polylactic acid fiber non-woven fabric; the polylactic acid fiber non-woven fabric is a polylactic acid fiber spunlace non-woven fabric, a polylactic acid fiber hot air non-woven fabric or a polylactic acid spunbond non-woven fabric; the absorption core layer comprises an upper layer, a middle layer and a lower layer; the upper layer and the lower layer are made of polylactic acid fiber non-woven fabrics, and the middle layer is a mixture composed of polylactic acid two-component fibers and super absorbent resin. And the bottom layer is a degradable impermeable film which is a PHA modified polylactic acid film. The composite material has natural weak acidity and natural antibacterial activity, can create a weak-acidity antibacterial microenvironment for people, is skin-friendly, environment-friendly and healthy, and is an ideal selected material for disposable hygienic products. The natural antibacterial agent has the functions of natural bacteriostasis, weak acidity and the like, and is biodegradable.

The invention relates to the field of hygienic products, and particularly discloses a probiotic hygienic product and a preparation method thereof. The probiotic hygienic product comprises a probiotic non-woven fabric, the probiotic non-woven fabric contains fibers rich in probiotics, and a preparation method of the fibers rich in the probiotics comprises the following steps: dissolving soybean protein isolate and calcium chloride to obtain a receiving solution; performing coaxial electrostatic spraying on the shell layer solution and the core layer solution to obtain probiotic embedded particles; carrying out electrostatic spinning on polyethersulfone to obtain a polyethersulfone nanofiber membrane; adding the probiotic embedded particles into a pectin solution to obtain a spraying solution, and spraying the spraying solution on the polyether sulfone nanofiber membrane to obtain blended powder; and mixing the blended powder with PE resin and an auxiliary agent according to a mass ratio, extruding, granulating to obtain a shell material, and carrying out composite spinning on the shell material and PET slices. The probiotic hygienic product disclosed by the invention has the advantages of high survival rate of probiotics, good storage stability, high activity retention rate, high water-holding capacity and good antibacterial activity.

The invention belongs to the technical field of radial artery haemostat, and particularly relates to a multifunctional radial artery haemostat which comprises a base, a haemostasis sliding hole is formed in the top of the base in a penetrating mode, a haemostasis pressure piece is arranged in the haemostasis sliding hole in a sliding mode, mounting grooves are formed in the two ends of the base, and a bandage is fixedly mounted between the two mounting grooves jointly. The bandage is made of flexible non-woven fabric, and the hemostasis pressing piece comprises a compression internal thread tube which is installed in the hemostasis sliding hole in a sliding mode. After a medical worker stops pressing the two pressing blocks, a reset spring pushes the friction tile to reset under the action of resilience force, and the abutting effect with the friction ring is relieved, that is, after the medical worker stops pressing the two pressing blocks, if the twisting sleeve rotates again, the adjusting screw cannot be driven to rotate, and therefore the pressing inner threaded pipe cannot move upwards or downwards, and the medical worker cannot be damaged. The twisting sleeve is prevented from rotating and hurting the wound of the radial artery of the patient again, and the safety protection performance of hemostasis is improved.

The invention relates to the technical field of reverse osmosis membranes, in particular to a polyamide reverse osmosis membrane for high-salinity wastewater treatment and a preparation method of the polyamide reverse osmosis membrane. The invention solves the problem that the polyamide reverse osmosis membrane cannot give consideration to both desalination rate and water flux. The polyamide reverse osmosis membrane comprises a polyester non-woven fabric layer, a polysulfone porous layer, a transition layer and a polyamide layer. The polysulfone porous layer is prepared, and the modified pore-forming agent is added to improve the water flux of the reverse osmosis membrane; the hydrophilicity of the reverse osmosis membrane is improved by preparing the transition layer and adding a hydrophilic auxiliary agent when the polyamide layer is prepared; the flux attenuation rate of the polyamide reverse osmosis membrane is reduced by preparing the polyamide layer; the desalination rate of the reverse osmosis membrane is improved by introducing a composite ion complexing agent and graphene quantum dots into the polyamide layer.

The invention relates to the technical field of cloth bag processing, and discloses a non-woven fabric bag processing parameter regulation and control method and system based on deep learning, and the method comprises the steps: obtaining the real-time rotation speed and tension data of equipment, carrying out the signal filtering and state calculation, obtaining a cloth traction state, carrying out the fuzzy logic processing, and determining the adjustment amount; obtaining a target rotation speed adjustment amount; according to the target rotation speed adjustment amount, threshold judgment and parameter dynamic updating are carried out, a new tension fluctuation index is obtained, fitness evaluation is carried out, and the product specification fitness is obtained; according to the product specification fitness, a dynamic adjustment decision is made, a parameter regulation and control scheme is obtained, risk quantification is carried out, and a production interruption risk level is obtained; and according to the production interruption risk level, risk threshold verification and optimization algorithm correction are carried out, a defective percentage inhibition value is obtained, tension stable signal analysis and global fusion output are carried out, and final processing equipment parameter configuration is obtained. The method can improve the qualified rate of products.

A long-fiber non-woven fabric comprising fibers mainly composed of a thermoplastic resin, the fibers having an average single-fiber diameter of 10.0 [mu] m or more and 20.0 [mu] m or less, and the cross-sectional porosity of the long-fiber non-woven fabric being 30% or more and 80% or less. Provided is a long-fiber non-woven fabric having excellent flexibility in which it is possible to follow the device form of an airbag housing member, and excellent mechanical strength in which it is not broken or split when in contact with the airbag housing member.

The invention belongs to the technical field of composite non-woven fabric bag production and detection, and provides a composite non-woven fabric bag production water and air permeability detection device which comprises a detection box, a fixing sleeve is fixedly arranged in the detection box, and a lifting seat is arranged on the inner end face of the detection box around the fixing sleeve in a rectangular mode. The lifting seats are fixedly connected with telescopic first electric telescopic seats, the telescopic ends of the first electric telescopic seats are connected with guide rails, the guide rails are slidably connected with a plurality of first electric telescopic seats, and the positioning mechanism can clamp and fix the composite non-woven fabric bag. According to the invention, when the air pressure in the detection tank is increased, the volume in the detection tank is increased through the adjusting assembly, so that the air pressures in all the detection tanks are always kept consistent in the detection process, and the permeation amount of water flow or air flow in the detection tank is judged by observing the change of the volume of the detection tank.

The invention relates to the field of layered interior ceiling processing, and particularly discloses an environment-friendly automobile interior ceiling and a preparation method thereof.The environment-friendly automobile interior ceiling sequentially comprises base cloth, glue-coated PET fiber felt, base cloth, an adhesive and a surface decoration layer from bottom to top; the base cloth is made of any one of non-woven fabric, film-coated non-woven fabric or film-coated non-woven fabric; the preparation method comprises the following steps: coating polyurethane glue on the upper surface and the lower surface of the PET fiber felt to obtain a glue-coated PET fiber felt; spraying water to the glue-coated PET fiber felt, then attaching the glue-coated PET fiber felt to the base cloth, then carrying out hot press molding for 40-120s at the temperature of 100-140 DEG C, and cooling to obtain a semi-finished product; an adhesive is sprayed on the semi-finished product, a surface decoration layer is laid on the semi-finished product, hot pressing is conducted for 20-100 s at the temperature of 90-120 DEG C, after cooling, cutting, edge covering and aftertreatment are conducted, and a finished product is obtained. The method has the advantages of environmental protection, no pollution in the production process, no influence on human health of a user, facilitation of recovery and long service life.

The invention belongs to the field of functional textile materials, and provides a directional moisture-conducting, dry, comfortable, breathable and quick-dry fabric and a preparation method thereof. A three-layer composite structure design is adopted, the outer layer is a gradient wetting structure formed by attaching a thermoplastic polyurethane film subjected to single-face thermal orientation treatment and knitted fabric, the middle layer is a hydrophilic non-woven fabric, the inner layer is a knitted fabric subjected to hydrophilic finishing, and the two layers are compounded through a hot melt adhesive dot-shaped net. Hydrophilic blocks of the thermoplastic polyurethane film are directionally enriched through single-face contact heating, gradient distribution with one hydrophilic side and one hydrophobic side is formed, and the hydrophobic surface is coated with a low-surface-energy coating. The fabric has excellent one-way moisture conduction performance, moisture can be rapidly transmitted from the inner layer to the outer layer and rapidly volatilized, dryness and comfort of the close-fitting fabric are kept, meanwhile, the fabric has good air permeability and quick-drying performance, the moisture conduction rate is increased by 30% or above compared with that of traditional fabric, and the fabric is suitable for being popularized and applied. The fabric has wide application value in the fields of sportswear, outdoor equipment, leakage-proof underpants and the like.

The invention relates to a preparation method of a hydrophobic and oleophobic PTFE membrane, and belongs to the technical field of PTFE membrane preparation. Aiming at the problems that an existing PTFE membrane is difficult to construct a micro-nano multi-stage coarse structure and has a synergistic effect with low chemical surface energy, the hydrophobic and oleophobic properties are insufficient and the structural stability is poor, the key points of the technical scheme provided by the invention are as follows: firstly, carrying out ethanol ultrasonic cleaning on a PTFE base membrane of 20-30 microns, and carrying out vacuum plasma treatment to form a nano coarse structure and oxygen-containing polar group active sites; then, under the protection of nitrogen, immersing into an ethanol solution containing perfluorodecyltriethoxysilane, dibutyltin dilaurate and nano cellulose whiskers, carrying out hot-pressing compounding with PET non-woven fabric, carrying out heat treatment, and finally, coating with a fluorine-containing polymer nano fiber layer through an electrostatic spinning process; the composite hydrophobic layer with the synergistic effect of a micro-nano multistage coarse structure and chemical low surface energy is formed, the water contact angle is larger than or equal to 155 degrees, and the oil contact angle is larger than or equal to 130 degrees. The PTFE film prepared by the preparation method can be used in the fields of waterproof breathable materials, self-cleaning surfaces, oil-resistant packaging and the like.

A table or chair leg protective sleeve is provided. The table or chair leg protective sleeve sleeves a table or chair leg; the table or chair leg protective sleeve includes a protective sleeve body and a protective sleeve base; the protective sleeve body is embedded into the protective sleeve base; the protective sleeve base includes a nonwoven cloth pad and a hard component; a first groove is provided in the nonwoven cloth pad; and the hard component is embedded in the first groove. Since the hard component is arranged in the protective sleeve base, a hard structural member exists between the protective sleeve body and the protective sleeve base. When the chair leg is moved, the hard component at a middle layer is used as a support, so that the table or chair leg protective sleeve has a load-bearing capacity and does not deform as a whole.

The invention relates to the field of automobile roofs, and particularly discloses a low-odor dry ceiling and a manufacturing method thereof. The invention discloses a low-odor dry ceiling and a manufacturing method thereof. The low-odor dry ceiling comprises a non-woven fabric, a first chopped glass fiber layer, a first adsorption bonding layer, a first hot melt adhesive film layer, a polyurethane foam layer, a second chopped glass fiber layer, a second adsorption bonding layer, a second hot melt adhesive film layer and a fabric layer which are sequentially connected, each of the first adsorption bonding layer and the second adsorption bonding layer comprises high-density polyethylene powder and an adsorbent, the addition amount of the adsorbent is 15-25wt% of that of the high-density polyethylene powder, the adsorbent is silicon dioxide aerogel modified composite activated carbon, and the composite activated carbon comprises microporous activated carbon and mesoporous activated carbon in a mass ratio of (2.56-3.12): (1.12-2.05); in addition, the preparation method disclosed by the invention has the advantage of reducing odor and VOC (Volatile Organic Compounds) in the production and use processes of the automobile roof.

The invention relates to the technical field of microbial culture, and provides a culture device for agricultural microbial agent production and a use method, the culture device comprises a culture box, and the top of the culture box is hermetically and detachably provided with a box cover. According to the device, the air pump is controlled by the controller to be started, so that the air pressure in the closed space is increased, the air passes through the non-woven fabric and the polymer microporous membrane, more tiny bubbles can be generated under the action of the polymer microporous membrane, a nutrient solution flows and is mixed, and the stirring effect on the nutrient solution is achieved; a nutrient solution in the incubator flows into the culture dish through the liquid discharge pipe, so that the stirring of the nutrient solution and the injection of the nutrient solution into the culture dish to be mixed with a microbial inoculum can be completed without using more structural components, the operation is simple, and the condition of pollution caused by improper cleaning is avoided; therefore, the subsequent microbial agent culture effect is improved.

The invention relates to the technical field of non-woven fabric production and processing, in particular to automatic non-woven fabric roll packaging equipment which comprises a base, a U-shaped seat, a limiting unit and a packaging mechanism. The upper end part of the thin film has an upward moving trend through friction between the two rotating rollers and the thin film in the upward moving process, the lower end part of the thin film has a downward moving trend through friction between the two rotating rollers and the thin film in the downward moving process, and then the thin film is tightened in the width direction of the thin film. According to the non-woven fabric winding device, the film can be wound on the non-woven fabric roll conveniently, the two rotating rollers abut against the film to be matched with the process, the film is tightened and not folded or wound mutually in two operation modes, the film is evenly spread and wound on the non-woven fabric roll, and the problems that the packaging quality is affected and the film is wasted due to folding and winding of the film are solved.