292 results about "Hemp fiber" patented technology

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 discloses a ground directional drilling goaf passing leaking stoppage method which comprises the steps that hole data of a goaf are obtained, and the hole data comprise the hole depth and the crack width; when the width of the crack is larger than 5 mm, a foundation plugging material is adopted for conducting foundation plugging on the hole of the goaf, and the foundation plugging material is an inert material and cement paste; judging whether basic plugging fails or not to obtain a first judgment result; if the first judgment result shows that the basic plugging fails, a flexible plugging material is adopted for conducting medium-term plugging on the holes in the goaf, and the flexible plugging material is a material formed by mixing hemp fiber, sawdust, soybeans and water. According to foundation plugging, a large channel is filled through particle bridging, a primary plugging layer is formed after cement paste is solidified, the flexible material can adapt to trace deformation of surrounding rock through deformation filling, and micro cracks of a foundation layer are plugged. Through graded gradient filling, the leaking stoppage effect can be greatly improved.

The invention discloses a degradable solid insulating material for a transformer. The degradable solid insulating material comprises the following raw materials in percentage by mass: 43-58% of bio-based epoxy resin; 3%-6% of polyethylene glycol; 25%-35% of a functional filler; 5%-10% of degradable reinforced fibers; 3%-8% of a degradation triggering auxiliary agent; 1%-3% of a degradation agent; the invention relates to the technical field of electrical insulation. According to the degradable solid insulating material for the transformer, natural degradation is achieved through hydrolyzable ester bonds of the bio-based epoxy resin in cooperation with the polylactic acid microspheres, the solid waste amount is reduced, meanwhile, degradation products are fatty acid and polysaccharide substances, the environmental safety standard is guaranteed, and through the synergistic effect of the modified calcined kaolin and the boron nitride nanosheets, the breakdown strength is improved; the insulation requirement is met, meanwhile, the heat conduction efficiency can be improved, the dielectric loss is reduced by filling micropores with nano silicon micro powder, and the density of the material is effectively reduced while the bending strength of the material is improved through alkali treatment of linen fibers.

The utility model relates to the technical field of jute fiber hot-rolling grinding tool accessory devices, in particular to a jute fiber hot-pressing forming structure mold which can uniformly heat a jute fiber plate and quickly demold the jute fiber plate so as to ensure the quality of a product and improve the production efficiency. Therefore, the hemp fiber hot-press forming structure mold is improved in practicability. Comprising an upper mounting plate, a lower mounting plate, eight sets of clamping rods, a first fixing block, a second fixing block, an upper die, a lower die, eight sets of first screws and eight sets of fourth screws, the inner ends of the upper mounting plate and the lower mounting plate are connected with the four sets of clamping rods correspondingly, and four sets of first through holes are formed in the outer ends of the first fixing block and the second fixing block correspondingly; four groups of first clamping holes are respectively formed in the outer ends of the upper die and the lower die, eight groups of clamping rods respectively penetrate through the first through holes and are clamped with the first clamping holes, and four groups of second through holes are respectively formed in the outer ends of the upper mounting plate and the lower mounting plate.

The invention provides a biomass antibacterial sweat-absorbent fabric and a preparation method thereof, and belongs to the technical field of fabrics. The preparation method comprises the following steps: firstly, mixing raw materials, spinning and weaving to obtain a textile fabric; wherein the raw materials comprise 20-50 parts of hemp fibers, 15-40 parts of bamboo fibers, 10-30 parts of polyester fibers, 5-15 parts of modified particles and 3-10 parts of sodium alginate; immersing the textile fabric into the finishing liquid, taking out, drying, and washing to obtain the biomass antibacterial sweat-absorbent fabric. The China-hemp fiber, the bamboo fiber and the polyester fiber are used as raw materials, the synthetic fiber and the natural fiber are mixed, the China-hemp fiber and the bamboo fiber enable the fabric to have good moisture absorption and breathability, and the polyester fiber guarantees good strength and wear resistance of the fabric. By introducing the modified particles, the hygroscopicity and antibacterial performance of the fabric are further improved, the modified particles can be combined with the fibers, and a layer of antibacterial functional film is formed on the surfaces of the fibers.

The present application relates to the technical field of degradable packaging. Particularly disclosed are a degradable food container and a preparation method therefor. The degradable food container comprises a paper food container base body and a degradable coating applied on the paper food container base body, wherein the degradable coating is prepared from the following raw materials in parts by weight: 40-50 parts of polylactic acid; 10-15 parts of polybutylene succinate; 15-20 parts of polyglycolic acid; 10-20 parts of cassava starch; 5-8 parts of an external additive; 1.2-1.8 parts of montmorillonite; 0.2-0.8 parts of boron nitride nanotubes; and 1.5-2.5 parts of modified hemp fibers. The preparation method therefor comprises: heating polylactic acid, polybutylene succinate and polyglycolic acid to a molten state, then adding cassava starch and an external additive thereto, finally adding montmorillonite, boron nitride nanotubes and modified hemp fibers thereto, performing extrusion granulation, melting and then coating same on the surface of the paper food container base body, cooling same, and then cutting and forming same into a container to obtain the degradable food container. The degradable food container of the present application can exhibit excellent temperature change resistance when being subjected to temperature change caused by an external environment.

The utility model provides a pair of full-hemp surface layer menstrual period trousers, which comprises a full-hemp surface layer menstrual period trousers body which is in the shape of underpants formed by cutting and compounding non-woven fabrics and rubber bands. The full-China-hemp surface layer menstrual period pants body sequentially comprises a surface layer, a flow guide layer, an absorber, an anti-leakage bottom film and an elastic surrounding body from the skin contact surface to the bottom, and the surface layer is made of full-China-hemp non-woven fabric. The surface layer is the non-woven fabric made of all China-hemp fibers, the China-hemp fibers belong to natural plant fibers and can destroy the thallus structure of bacteria and prevent anaerobic bacteria from surviving, the China-hemp fibers have moisture absorption and quick drying functions, a dry environment is not beneficial to bacterial reproduction, menstrual blood is quickly pulled to the bottom through the multi-layer tiled structure in the absorber, and therefore the menstrual blood can be quickly absorbed. The China hemp fibers can effectively inhibit bacterium breeding and prevent bacteria from breeding upwards, skin or gynecological diseases caused by contact with skin are avoided, and the use requirement of women for menstrual period trousers is met.

The invention discloses a manufacturing method of an environment-friendly paper product. The environment-friendly paper product is prepared from the following raw materials in parts by mass: 60-70 parts of a main fiber raw material, 25-35 parts of an auxiliary fiber raw material, 3-8 parts of an environment-friendly additive and 1-2 parts of a pretreating agent. By means of the components, by adding the auxiliary fiber raw materials, the environmental protection property is remarkably improved, waste cotton and linen and agricultural waste are converted into papermaking raw materials, consumption of primary fibers is reduced, meanwhile, waste recycling is achieved, and pollution caused by incineration and landfill is reduced. The auxiliary fibers and the main fibers have a synergistic effect and are matched with the environment-friendly auxiliaries to reinforce the quality of the paper, the cotton and linen fibers improve the flexibility, the agricultural waste fibers enhance the stiffness, lignin and short fibers are separated through low-temperature pyrolysis, impurities are prevented from affecting the performance of the paper, and solid powder rich in the lignin and the short fibers is recycled and reused.

An aerosol-generating article (10)(100)(1000) comprises: an aerosol-generating substrate (12)(112)(1004); a downstream element (42)(150)(1008) provided downstream of the aerosol-generating substrate (12)(112)(1004) and in axial alignment with the aerosol-generating substrate, the downstream element comprising a cellulosic filtration material. The fibrous material comprises a plurality of regenerated cellulose fibres selected from one or more of viscose fibres, modal fibres, Lyocell fibres and viscose rayon fibres; or a plurality of natural fibres selected from one or more of flax fibres, hemp fibres, jute fibres, kenaf fibres, ramie fibres, abaca fibres, phormium fibres, sisal fibres, coir fibres, cotton fibres, and kapok fibres. The cellulosic fibrous material further comprises an additive coating applied to the plurality of regenerated cellulose or natural fibres, the additive coating comprising at least 5 percent by weight of exogenous lignin on a dry weight basis.

The invention provides a deodorant bio-based wool blended yarn and a preparation method thereof, and belongs to the technical field of blended yarns. The deodorization bio-based wool blended yarn is prepared by modifying and assembling three bio-based materials; the method comprises the following steps: performing surface reconstruction on hemp fibers by using ionic liquid, and converting rigid surfaces of the hemp fibers into permanently soft and high-moisture-absorption structures; a tea polyphenol in-situ polymerization technology is adopted, so that a layer of durable anti-oxidation and odor-resistant nano coating is connected to the wool fiber; the preparation method comprises the following steps: physically locking antibacterial chitosan in an alginate network by adopting a wet spinning technology to prepare a non-dissolution functional core yarn; the three components are precisely combined through a core spinning technology to form a synergistic core-shell structure, a shell is responsible for resisting oxidation from the source and creating a dry and bacteriostatic microenvironment, and a core actively kills bacteria and performs humidity management, so that coexistence of comfort, lasting functionality and sustainability is realized.

The utility model discloses an antibacterial flax blended yarn which comprises flax fibers, first blended fibers are wound on one sides of the flax fibers, second blended fibers are wound on one sides of the first blended fibers, and third blended fibers are wound on one sides of the second blended fibers. According to the linen blended yarn, the second blended fiber and the third blended fiber are added to the linen blended yarn, the second blended fiber is the cotton fiber, the cotton fiber can improve the hygroscopicity and air permeability of the yarn and reduce the dryness and vulnerability of the yarn, and therefore the anti-fracture performance is improved, and the third blended fiber is the polyester fiber. According to the flax blended yarn, the polyester fibers have high elongation at break and evenness, the spinnability and breaking strength of the blended yarn can be improved, meanwhile, the whole flax blended yarn is formed by weaving various fibers in a crossed mode to be in a twisted shape, force borne by the yarn is evenly dispersed, the possibility of fiber breakage is reduced, and therefore the purpose that the flax blended yarn can be prevented from being broken is achieved.

The utility model discloses a packaging and conveying device for hemp fiber production, and belongs to the technical field of packaging and conveying. The packaging and conveying device for fibrilia production comprises a fixing frame, the lower end face of the fixing frame is fixedly connected with a supporting plate, the two sides of the supporting plate are each fixedly connected with a pair of moving wheels, a packaging mechanism capable of synchronously winding multiple fibrilia is arranged above the fixing frame, and the fibrilia can be packaged through synchronous rotation of a rotating rod and multiple winding rollers. A plurality of jute fibers can be wound at the same time, winding and packaging work of more jute fibers can be completed within the same time, the telescopic end of the electric telescopic rod continuously reciprocates to drive the movable frame and the rope penetrating block to synchronously move, and therefore the winding path of the jute fibers is changed. In this way, the jute fibers can be evenly wound on the winding roller, the problem that the jute fibers are locally stacked on the winding roller or are not evenly wound on the winding roller is solved, the packaging quality and appearance of the jute fibers are improved, and follow-up storage and use are facilitated.

The application relates to the technical field of layered fabrics, and discloses a moisture-conducting layered composite fabric based on multi-element blended yarn and a preparation method thereof. By constructing a gradient moisture-conducting layered structure with a moisture-conducting inner layer and a moisture-absorbing outer layer, the moisture-absorbing and moisture-conducting performance of the layered fabric is optimized; the multi-element blended yarn of moisture-absorbing and sweat-releasing polyester staple fiber, cotton fiber and hemp fiber and modified pure cotton yarn are used in the inner layer to realize moisture absorption and moisture conduction through wicking effect; the outer layer is made of pure cotton fabric which can quickly absorb the moisture conducted by the inner layer and evaporate to the environment, forming a moisture-conducting path. The prepared layered composite fabric not only has excellent moisture-absorbing and moisture-conducting performance, but also has improved washing resistance and antibacterial durability.

A wool-based insulation material is disclosed, wherein the majority fiber component is wool, making up over 50% of the total composition. The wool is blended with a proprietary fire-retardant adhesive and a minority component of green fibers (less than 50%), which includes natural fibers such as hemp fibers, soy fibers, and banana fibers. These plant-based fibers contribute to the insulation's sustainability and structural properties. The blend specifically excludes impurities such as hemp hurd, wood chips, and stalk materials. This insulation material combines excellent fire resistance, thermal insulation, and environmental sustainability, with wool serving as the critical component.

The invention relates to the field of aupoz fiber processing equipment, and particularly discloses an aupoz fiber scraping device which comprises a first aupoz scraping roller, a second aupoz scraping roller, an aupoz feeding tray, a winding roller assembly, a reversing roller assembly and a discharging groove. The other ends of the blades can be bent downwards to extend into the second hemp scraping roller through the row reversing roller assembly to scrape the hemp, and the winding roller assembly can wind the scraped blade fibers at one end, so that the dragging force of the blades is kept when the second hemp scraping roller scrapes the hemp, slipping is prevented, and the efficiency is improved. Compared with a traditional hemp scraping machine, the efficiency is high, the automation degree is high, the blades can be prevented from slipping, and safety is high.

The present invention provides a polypropylene-viscose-linen fiber blended mattress spring wrap and a preparation method thereof, which belong to the field of non-woven fabrics. The preparation method of the polypropylene-viscose-linen fiber blended mattress spring wrap comprises the following steps: opening and mixing, carding, laying nets, needle punching reinforcement, and post-processing. The polypropylene-viscose-linen fiber blended mattress spring wrap and the preparation method thereof of the present invention can not only realize the concept of green and sustainable development, but also improve the mechanical properties and corrosion resistance of the mattress spring wrap while improving the anti-aging performance of the non-woven fabric; at the same time, in the preparation process of the blended mattress spring wrap, it can effectively avoid the problems of difficult-to-control entanglement state, poor blending uniformity, difficult-to-control soft and hard style, and unstable overall performance of the mattress spring wrap caused by inconsistent raw material fiber characteristics; effectively avoid fiber breakage during the carding process, and avoid fiber adhesion during the laying net process, thereby improving the preparation yield of the mattress spring wrap.

The aerosol generating article (10)(100)(1000) comprises an aerosol generating substrate (12)(112)(1004) and a downstream element (42)(150)(1008) provided downstream of the aerosol generating substrate (12)(112)(1004) and axially aligned with the aerosol generating substrate, the downstream element comprising a cellulosic filtration material. The fibrous material comprises a plurality of regenerated cellulose fibers selected from one or more of viscose fibers, modal fibers, lyocell fibers, and viscose rayon fibers, or a plurality of natural fibers selected from one or more of flax fibers, hemp fibers, jute fibers, kenaf fibers, ramie fibers, abaca fibers, phormium fibers, sisal fibers, coir fibers, cotton fibers, and kapok fibers. The cellulosic fibrous material further comprises an additive coating applied to multiple regenerated cellulose or natural fibers, the additive coating containing at least 5% by weight of exogenous lignin on a dry weight basis.

The utility model discloses a composite yarn, which relates to the technical field of textiles, and is characterized in that the peripheral wall of a yarn core is coated with a waterproof layer, a moisture-conducting yarn is spirally wound on the peripheral wall of the waterproof layer, and a plurality of supporting pieces are arranged on the moisture-conducting yarn along the length direction of the moisture-conducting yarn in an array manner; a first ventilation space is formed by gaps among the multiple supporting pieces, the moisture guiding yarn and the waterproof layer, moisture dissipation yarn is spirally wound around the peripheral walls of the multiple supporting pieces, the moisture absorption performance of the moisture dissipation yarn is larger than that of the moisture guiding yarn and the supporting pieces, and a second ventilation space is formed by gaps among the multiple supporting pieces, the moisture guiding yarn and the moisture dissipation yarn. The first ventilation space is communicated with the second ventilation space. The waterproof layer can effectively prevent the yarn core from making contact with water, the ventilation effect between the interior and the exterior of the yarn is improved through the first ventilation space and the second ventilation space, and the moisture dissipation yarn made of linen fibers can rapidly disperse and remove absorbed water. The moisture absorbed in the moisture guiding yarn and the supporting pieces can be timely transferred into the moisture dissipation yarn to be rapidly dissipated.

This invention provides a natural recycled composite functional fabric, characterized in that: the composite functional fabric is composed of viscose fiber, hemp fiber, and bamboo fiber, woven using a double-weft structure, wherein the warp yarns are a blend of viscose / hemp fiber / bamboo fiber, and both the outer and inner wefts are viscose fiber; the composite functional fabric is modified by lignin / keratin composite. This natural recycled composite functional fabric, composed of viscose fiber, hemp fiber, and bamboo fiber, and woven using a double-weft structure, wherein the warp yarns are a blend of viscose / hemp fiber / bamboo fiber, and both the outer and inner wefts are viscose fiber, can be used as an anti-UV curtain fabric after finishing.

The utility model relates to the technical field of automotive trim rim charge recovery, in particular to a rim charge recovery device for automotive trim jute fiber board production, a recovery box and a processing mechanism, the processing mechanism is mounted at the top end of the interior of the recovery box, and the interior and the top end of the recovery box are hollow. Recycled leftover materials are poured into the recycling box through the processing mechanism, a second driving motor drives a screw rod to rotate in a limiting hole, so that a sliding block on the upper portion moves, a first driving motor at the bottom end of the sliding block drives a rotating rod and scattering rods on the two sides to rotate, and the leftover materials are scattered. According to the leftover material treatment device, leftover materials soaked in water inside are scattered and treated, recycling, processing and utilization are facilitated, treatment liquid is sprayed into water through a pressing spray head on one side, so that the reaction speed is increased, the treatment efficiency is improved through continuous movement and high-speed rotation, the treatment effect is good, the requirement for treating a large number of leftover materials is met, and practicability is high.

The invention discloses a production technology of a jute environment-friendly coir mat with a three-dimensional structure, and relates to the technical field of jute coir mat production.The production technology comprises the following steps that S1, raw material pretreatment is conducted, specifically, raw jute is sequentially subjected to three-stage degumming including anionic surfactant solution soaking, pectinase treatment, lignin peroxidase treatment and caustic soda boiling-off, performing countercurrent cleaning and vacuum drying to obtain flexible fibers; s2, mixing fibrils: mixing the pretreated jute fibers with palm fibers and ramie fibers in proportion to form a mixed fiber raw material; s3, opening and carding: performing loosening treatment on the mixed fibers by a bidirectional opener, and preparing flocculent fibers by a carding machine; the flocculent fiber filaments are sprayed to a lapping machine through an exhaust fan, the lapping machine reciprocates at the constant speed of 1.5-2.5 m / s in the direction perpendicular to the spraying direction, the fiber flexibility can be improved, a three-dimensional supporting structure can be constructed, and a formaldehyde adding source can be eliminated.

The utility model relates to the technical field of linen fiber processing, in particular to supercritical carbon dioxide treatment equipment for uvioresistant linen, which is characterized in that a sealing cover assembly is opened, linen fibers of a hanging assembly are taken down, and the linen fibers rise along with the sealing cover assembly, so that the linen fibers are prevented from being manually taken from the inside of a pressure container; comprising a supporting frame, a gas storage tank, a pressure container and a controller, the gas storage tank and the pressure container are arranged at the bottom end of the interior of the supporting frame, the controller is installed at the front end of the pressure container, the sealing cover assembly is arranged at the top end of the supporting frame, and the sealing cover assembly is used for sealing the top end of the pressure container; a hanging assembly is arranged at the bottom end of the sealing cover assembly and used for hanging linen fibers, and a double-pump assembly is arranged at the bottom end in the supporting frame and used for transferring carbon dioxide between the gas storage tank and the pressure container.

This document provides hemp fiber biocomposites and methods and materials for making and using hemp fiber biocomposites. For example, hemp fiber biocomposites that can be used as a hydroponic growth medium are provided. Methods for making hemp fiber biocomposites also are provided.

The invention relates to the technical field of adhesives, and discloses a high-strength impact-resistant acrylic foam adhesive tape and a preparation method thereof.The acrylic foam adhesive tape comprises an acrylic foam adhesive layer and a release layer, the acrylic foam adhesive layer is prepared by taking acrylate polymerization emulsion as a main raw material and mixing rosin resin, a foaming agent and the like; the acrylate polymerized emulsion has a shell-core structure, a shell layer is cross-linked acrylate, a core layer is sisal fiber, the existence of the sisal fiber enables the finally prepared foam tape to have the characteristic of high strength, the existence of a cross-linked modifier enables the molecular chain density of the acrylate polymerized emulsion to be improved, and the impact performance of the tape is enhanced. And the cross-linked modified body structure also contains rigid heterocyclic rings and active hydroxyl substituent groups, so that the impact resistance and the adhesive property of the adhesive tape can be improved.

The invention discloses a needle-punched cotton felt containing plant functional fibers and a preparation method of the needle-punched cotton felt, and belongs to the technical field of non-woven materials. The needle-punched cotton felt is composed of jute fibers, polyester staple fibers, auxiliary agent type deodorization fibers and 4080 low-melting-point fibers according to specific mass percent. Wherein the jute fibers are subjected to pretreatment of chemical degumming and soft modification treatment; the assistant type deodorizing fiber is a fiber prepared by blending and spinning a composite deodorizing assistant and a modified polymer matrix; the composite deodorizing auxiliary agent comprises nano zinc oxide, a chitosan derivative and zeolite powder; the modified polymer matrix is a polymer matrix modified by a compatilizer. The needle-punched cotton felt disclosed by the invention has excellent flexibility, high mechanical strength and an efficient and lasting deodorization function.

This invention relates to the field of roof construction technology, and in particular to a construction method for a modern traditional-style wooden tile roof. The method includes the following steps: re-laying sheathing boards impregnated with preservatives on the roof; grouting the gaps between adjacent sheathing boards; injecting preservatives into the tenon and mortise joints and corners of the sheathing boards; applying protective mortar and allowing it to dry; applying a layer of plaster backing and patting it when it is 70-80% dry; after the plaster backing is completely dry, applying a light gray backing and applying hemp fiber to form knots when it is 80% dry; brushing a nano-composite waterproof layer onto the light gray backing; applying a flame-retardant layer onto the nano-composite waterproof layer; applying shoulder mortar to the ridge; laying the tiles on the flame-retardant layer; and finally, securing the joints and ensuring a tight seal. This invention, using the above steps, improves the waterproof performance of the thatched wooden roof and provides a method for laying the tiles to prevent them from slipping off on steeply sloping roofs.

The application discloses an environment-friendly curtain fabric and a preparation method thereof. The environment-friendly curtain fabric comprises a fabric base layer and a surface functional layer, and the surface functional layer is obtained by growing a metal organic framework on the surface of the fabric base layer. The fabric base layer comprises the following components in parts by weight: 70-82 parts of polyester fiber, 9-15 parts of cotton fiber and 9-15 parts of hemp fiber. The environment-friendly curtain fabric prepared by the application has good wrinkle resistance, wear resistance and air permeability, and can absorb and degrade formaldehyde in the air and purify indoor air.

The application provides an antibacterial fabric applied to a home wear and a processing technology thereof, and is applied to the technical field of degerming and antibacterial technology; the bamboo fiber and the silk fiber are applied as the processing materials of the home wear, so that perspiration is helped and the dryness of the body is maintained; meanwhile, the hemp fiber, the metal fiber and the activated carbon fiber are applied as the processing materials, so that the body temperature is adjusted and antibacterial is achieved, and the peculiar smell and the bacteria in the air are adsorbed and removed, so that the home wear has good air permeability and the effect of sweat absorption and antibacterial is achieved.

The invention provides composite expansive soil containing microorganisms-sisal fibers. The composite expansive soil comprises the sisal fibers, expansive soil, a bacillus pasteurii solution and a cementing solution. Wherein the mass part ratio of the bacillus pasteurii liquid to the cementing liquid is 3: (2-6); the mass part of the sisal fiber is 0.4-1.0; the concentration of the cementing liquid is 1.0 to 3.0 mol / L; the cementing liquid comprises the following components in parts by mass: 1 part of urea and 1-6 parts of calcium chloride. The composite expansive soil provided by the invention is improved by adopting a means of combining a microbe induced carbonate precipitation technology and fiber reinforcement, and the advantage complementation of microbe mineralization and physical reinforcement can be realized. The invention further provides a preparation method of the composite expansive soil containing the microorganisms-sisal fibers.