365 results about "Single filament" patented technology

The invention provides an intelligent evaluation method for mechanical properties of a carbon fiber composite material, and relates to the technical field of material performance analysis, and the method comprises the following steps: evaluating the performance dispersion of a current batch of samples according to a fiber agglomeration area proportion and a carbon fiber monofilament diameter, and comparing the performance dispersion with a preset dispersion threshold, identifying a non-manufacturability discrete risk level; determining the tensile strength value of each sample through a tensile test, performing statistics to obtain a strength mean value and a strength standard deviation, performing matching analysis on the performance dispersion, the strength mean value and the strength standard deviation, and extracting the fiber reinforcement efficiency; performing weighted fusion processing on the fiber reinforcement efficiency and the fiber agglomeration area proportion to obtain a current batch fiber form comprehensive index, comparing the current batch fiber form comprehensive index with a historical batch, and identifying a fiber form change amplitude; and evaluating the quality consistency degree among the batches according to the strength deviation value and the dispersion difference among the batches, and identifying the non-manufacturability discrete source.

This invention provides a multifunctional gradient composite filament for 3D printing, its preparation method, and its applications, relating to the field of additive manufacturing materials technology. The filament's cross-section includes at least two structurally or functionally distinguishable regions, each region composed of a thermoplastic polymer with different chemical properties, or a thermoplastic polymer matrix with the same chemical properties but different functional modifications. These at least two regions are arranged in an ordered spatial pattern on the filament's cross-section using a multi-component co-extrusion technique, enabling pre-design and integration of properties. This invention overcomes the inherent limitations of traditional single-material filaments, achieving multifunctionality and performance designability of a single filament. It significantly improves the interlayer bonding performance of multi-component 3D printing and the comprehensive mechanical properties of the printed composite material. Furthermore, it allows for the production of components with both functional gradients and high mechanical properties in a single printhead operation, making it suitable for mass production.

The utility model relates to a center twisting type ultra-weak fiber bragg grating temperature and humidity stranded yarn, which adopts a humidity ultra-weak fiber bragg grating array, the temperature ultra-weak fiber bragg grating array and Kevlar fibers are combined to wrap a spiral armor tube, and then a metal wire braid layer is braided along the axial direction to form a temperature and humidity intelligent monofilament; the temperature and humidity intelligent monofilament serves as a center filament and is twisted with the six stainless steel wires to form a cable shape, and the temperature and humidity stranded filament of the ultra-weak fiber grating is manufactured. According to the utility model, the long-distance temperature and humidity ultra-weak fiber grating array is adopted to monitor temperature and humidity, temperature compensation is facilitated, temperature and humidity changes can be quickly responded, the filamentation porosity is large, the response speed is high, the mechanical strength is high, the adaptability is strong, and subsequent processing is facilitated.

Described is an insect net strip produced from a wide insect net which has been cut in a warp direction (xnet) by means of a one-step ultrasonic cutting and welding process. The insect net strip includes warp yarns and weft yarns extending substantially perpendicular to each other and at least 90% of the warp and weft yarns are monofilament yarns made of a thermoplastic material. After cutting and welding process the insect net strip has a first and a second edge extending parallel to said warp yarns each including a deformation zone being constituted by consolidated thermoplastic material deriving at least from said weft yarns. The deformation zone has a width (wdz) in the transverse direction (ystrip) of between 0.5-35 times the weft yarn diameter (øwe). At least 90% of gaps between adjacent weft yarns in the deformation zone are closed by consolidated thermoplastic material at least from the weft yarns which has been melted together to form a continuous or substantially continuous reinforced band-shaped edge portion of said insect net strip. The insect net strip is suitable for use in accordion-style constructions in greenhouse ventilation openings. A method for producing the insect strips is also described.

The invention relates to a high-strength and high-modulus polyacrylonitrile carbon fiber precursor, a carbon fiber and a preparation method thereof, and belongs to the field of polyacrylonitrile-based carbon fiber preparation. A wet spinning process is adopted, the method comprises the solidification step of at least two solidification baths, and n spraying devices are arranged between every two adjacent solidification baths in the solidification process to spray solutions to bath separation fibers; the concentrations Cg (i-1) and Cgi of the polar organic solvent in two adjacent coagulating bath solutions and the concentration C1-Cn of the polar organic solvent in the solution of the spraying device between the two adjacent coagulating bath solutions meet the following relational expression: Cg (i-1) is greater than or equal to C1gt; c2gt; C2gt; gt,... gt; cn > = Cgi, i > = 2, and n > = 3. The method mainly solves the problems that in the prior art, the breaking elongation coefficient of protofilaments (monofilaments) is large, and the number of broken filaments is large in the solidification process. According to the technical scheme, the problems are well solved, and the method can be used for preparing high-performance carbon fibers.

A fabric with a three-layer mesh bottom layer through hole structure comprises a surface layer which is a single-layer solid layer formed by interweaving transparent yarns with different elasticity, a middle layer which is formed by interweaving one or more than one shuttle of monofilaments up and down and is used for connecting the surface layer above the middle layer, and a bottom layer located below the middle layer, the bottom layer is a single-layer solid layer formed by interweaving different polyester yarns and monofilaments, the porous structure is located on the upper middle portion of the bottom layer, the porous structure is a warp weave structure formed by interweaving dyed yarns and transparent yarns in a staggered mode, the material is expanded to form any hole shapes, the air permeability is improved while the layers are rich, and the service life of the material is prolonged. The porous structure that the surface layer can see through the bottom layer is achieved through the layered structure, and the air permeability of the vamp can be further improved through the porous structure of the bottom layer.

The utility model discloses a spray velvet yarn, the spray velvet yarn includes: core yarn, knitting wool layer and outer covering yarn, the core yarn is formed by twisting and winding a plurality of low-elasticity filaments, the knitting wool layer is formed by disordered short fiber, the disordered short fiber of the knitting wool layer includes two types, and the outer covering yarn is formed by twisting and winding a plurality of low-elasticity filaments. One type is bottom silk formed by short fibers twisted among the low-elasticity filaments in the twisting and winding process and short fibers with roots penetrating into dynamic gaps among monofilaments forming the low-elasticity filaments, and the other type is free velvet formed by short fibers mutually adhered and wound together with the bottom silk; the outer wrapping thread is a high-elasticity filament which is twisted and wound on the outer side of the knitting wool layer, and the twisting and winding direction is opposite to the twisting direction of the core thread. By means of the mode, the soft and fluffy feeling of the yarn can be enhanced, and meanwhile yarn falling is reduced.

The application discloses an impact-resistant mine protective clothing and belongs to the technical field of mine protective clothing. The mine protective clothing is provided with an impact-resistant protective layer, and the impact-resistant protective layer comprises alternately stacked and connected first and second functional layers. The outermost layer of the impact-resistant protective layer towards the outside of a wearer of the protective clothing is the first functional layer, the first functional layer is a composite material layer composed of aramid woven fabric and a second resin, the second resin is filled in the fiber gap of the aramid woven fabric as a continuous matrix and covers the fiber surface, the weaving raw material of the aramid woven fabric is aramid monofilament subjected to first resin impregnation pretreatment, the first and second resins are both thermosetting resins, the first resin comprises a first compound, the first compound contains a morpholine ring and is bonded in a crosslinking network of the first resin, and the second functional layer is a dynamic crosslinking polymer layer. Compared with the prior art, the application can not only resist impact and be hard, but also absorb impact force and reduce the risk of blunt injury of personnel.

The invention discloses a superfine denier nylon cotton-feeling fabric and a preparation method thereof, and the preparation method sequentially comprises the following steps: yarn configuration and weaving: weaving is carried out by adopting warp yarns and weft yarns, the weft yarns are nylon air textured yarns (ATY), and the weft yarns are prepared by FDY filaments with the filament number of not more than 10D through air texturing processing; the dyed fabric is subjected to padding treatment, adopted finishing liquid contains waterborne polyurethane and a fluoride-free waterproof agent, baking shaping is conducted after padding, and the fabric is subjected to humidifying and moisture regaining treatment during fabric discharging. According to the superfine denier nylon cotton feeling fabric and the preparation method thereof, the touch feeling of the nylon fabric is improved through the specific yarn structure design and the synergistic after-finishing technology, so that the nylon fabric has the soft comfort close to that of a cotton fabric, and meanwhile, the characteristics of high wear resistance and high strength of nylon fibers and the effective fluoride-free waterproof performance are kept.

The invention discloses a combined type netting twine separating machine for processing, and relates to the technical field of separating machines, the combined type netting twine separating machine comprises a rack main body, a yarn guide roller assembly, a separating mechanism and a tension adjusting assembly; the yarn guide roller assemblies are sequentially installed at the feeding end of the machine frame body in the yarn conveying direction, the yarn separating mechanism is connected with the machine frame body through a lifting support, and the tension adjusting assembly is fixed to the discharging end of the machine frame body through a driving unit installation base. The feeding path of the fishing net mother yarn can be precisely restrained through a multi-section type continuous guide structure of the yarn guide roller assembly, and step-by-step precise separation from the mother yarn to the monofilament is achieved in cooperation with the one-to-one correspondence design of the yarn separation needle row and the needle pitch comb teeth of the yarn separation comb tooth plate; and meanwhile, the static electricity eliminating strip can eliminate yarn friction static electricity, monofilament adsorption adhesion is avoided, the angle and position of the filament separating comb plate can be flexibly adjusted through cooperation of the arc-shaped supporting base and the guide sliding rail, the problems of filament doubling and filament leakage are thoroughly solved, and the uniformity and consistency of monofilaments obtained after filament separation are guaranteed.

The invention discloses a carbon fiber polyester composite felt and a preparation method thereof, and relates to the technical field of high polymer materials, and the preparation method comprises the following steps: (1) carbon fiber directional activation; (2) in-situ grafting of sheath-core monofilaments; (3) dual-network synchronous lapping; and (4) node in-situ thermal consolidation. According to the preparation method disclosed by the invention, a carbon fiber polyester composite felt preparation system without an additional binder is constructed by sequentially implementing four steps of processes of carbon fiber directional activation, skin-core monofilament in-situ grafting, dual-network synchronous lapping and node in-situ thermal consolidation, and molecular-level synergistic combination of carbon fibers and polyester components is realized. The interface bonding strength and structural integrity of the composite felt can be remarkably improved, and meanwhile, the mechanical bearing stability of the composite felt is improved, so that the problems that in the prior art, carbon fibers and a polyester matrix are poor in interface compatibility, layering and falling are prone to occurring, and the service life is short can be solved. And the problems that the mechanical property of the composite felt is reduced, the preparation process is complicated and the environmental protection property is insufficient due to the need of adding an external binder are solved.

The invention discloses a dyeing-free black soft polyester fiber and a preparation method thereof, and belongs to the technical field of waste polyester recycling. The preparation method comprises the following steps: melting and extruding waste PET (Polyethylene Terephthalate) with the intrinsic viscosity of 0.50-0.80 dL / g through a twin-screw extruder, and depolymerizing in an EG / BHET homogeneous system to obtain an oligomer with the polymerization degree of 5-7; mixing with carbon black slurry and a polycondensation catalyst, and carrying out pre-polycondensation and final polycondensation to obtain regenerated functional polyester; and finally, carrying out melt spinning under the conditions that the temperature is 275-285 DEG C and the speed is 2500-3500 m / min, so as to obtain the fiber with the monofilament of 0.5-2.0 dtex, the tensile modulus of 30-60 cN / dtex and the color fastness of more than or equal to grade 4. By accurately controlling the depolymerization degree and the dispersion system, the problems of pigment agglomeration, complex process and high fiber modulus in the prior art are solved, high-added-value recycling of the waste PET is realized, and the product can be used for close-fitting textiles.

This invention proposes a design method for composite absorber wires used in optical fiber panels, the composite absorber wire itself, its fabrication method, and its applications. The design method calculates the area ratio A of the absorber wire to the filler wire and the area ratio B of the absorber wire to the monofilament wire in existing processes; matches the wire arrangement scheme to ensure that the area ratio C of the absorber material to the filler material deviates from A by ≤1%; and then adjusts to determine the drawing dimension H of the composite absorber wire, ensuring that the ratio D of the total cross-sectional area of ​​the absorber material to the total cross-sectional area of ​​the monofilament wire deviates from B by ≤1%. The composite absorber wire integrates the absorber material and the filler material, and its shape can be selected as an equilateral triangle, square, or regular hexagon. During fabrication, after integration, arrangement, and drawing, it is inserted into the gaps between the primary wires in the optical fiber panel. This invention simplifies the original two wire insertion operations to a single operation, increasing single-person time efficiency by 40%, increasing production capacity by 62.5%, reducing the rework rate to 0%, and reducing the mesh defect rate from 5% to 1%, thus stably ensuring the mesh, contrast, and transmittance performance of the optical fiber panel.

The application belongs to the technical field of textiles, and particularly relates to a high-low temperature TPU monofilament yarn, a processing technology thereof and a knitted vamp, comprising a TPU yarn with a skin-core structure, wherein the TPU yarn comprises a core layer and a skin layer, the core layer is modified for the purpose of improving the melting point, and the melting point of the skin layer is lower than that of the core layer; the core layer is modified by using a TPU raw material, so that the melting point of the core layer is improved, and the problem of poor thermal stability and easy decomposition under high temperature is solved; and the melting point of the core layer is higher than that of the skin layer, so that the processing cost of the whole monofilament yarn is reduced under the condition of modifying and improving the melting point.

This invention relates to the field of hollow polyester fiber technology, and discloses an octagonal star-shaped hollow polyester fiber and its preparation method, as well as a method for preparing filament yarn. The octagonal star-shaped hollow polyester fiber comprises a monofilament with a square ring cross-section and eight wing-like structures on its outer circumferential surface. These eight wing-like structures are evenly distributed on the four outer walls of the square ring, with unequal lengths on adjacent circumferentially adjacent outer walls. This invention uses wing-like structures of varying lengths on the outer circumference of the square ring, creating grooves of different depths on the fiber surface, forming capillary channels. Especially in the multifilament state, the special cross-section increases the gaps between monofilaments, improving bulkiness and air permeability. Furthermore, the large square space in the hollow portion facilitates mold design and processing, resulting in stable product performance, particularly maintaining the hollowness, thus providing better heat-shielding and insulation effects.

A resin composition for monofilaments contains a poly(3-hydroxyalkanoate)-based resin component. The resin composition has a melting point peak temperature of 140° C. or higher and a crystal melting enthalpy of 65 J / g or less as calculated from all melting peaks in differential scanning calorimetry. The monofilament containing the resin composition has high strength and elongation. A method for producing the monofilament containing the resin composition contains, in the stated order, (i) discharging the resin composition in a molten state from a spinning nozzle, and then cooling thereby forming a raw yarn and (ii) stretching the raw yarn in at least one direction.

The utility model discloses a fly fishing line with a composite structure core wire, which comprises a braided wire outer layer and a middle inner layer, the outer side of the middle inner layer is wrapped by the braided wire outer layer, and the middle inner layer adopts a parallel composite core wire. According to the utility model, the middle inner layer adopts the parallel composite core wires, and the inner layer monofilaments or yarns are not woven, straight and parallel, and the elongation is relatively low, so that the effect that the elongation of the finished fly fishing line is low or the elongation is low under at least low tension is realized; the elongation is accurately controlled through the composite core wire structure, and the problem that extension is unstable due to the pitch of a traditional braided wire is solved.

The present application relates to polybutylene terephthalate (PBT) material toothbrush filament technical field, specifically relates to a kind of multifilament version anti-lodging PBT monofilament and preparation method thereof;The preparation method is realized with the basic concept of multifilament to realize the basic form of monofilament, in the drawing process, every three monofilaments are gathered into a multifilament, in the subsequent water cooling, oiling etc. Process path, with the mode of multifilament, drafting, winding forming are completed.In the condition that monofilament specification remains unchanged, corresponding design is carried out to production process, and the quality indexes such as breaking strength, breaking strength variation coefficient, breaking elongation, breaking elongation variation coefficient of monofilament are controlled.In the realization equipment efficiency is improved three times target, product quality is upgraded, and the anti-lodging performance of PBT monofilament is improved.

The utility model discloses a chemical fiber monofilament oiling device, which relates to the field of monofilament production equipment, and adopts the technical scheme that the chemical fiber monofilament oiling device comprises an oiling tank and an oiling roller, an oil storage tank is arranged on the top surface of the oiling tank, filament separating frames are arranged on two sides of the oiling roller, an annular groove is formed in the oiling roller, and a mounting plate is integrally formed on the top surface of the oiling tank; a mounting groove is formed in the top surface of the mounting plate, a flow guide plate is rotationally connected into the mounting groove, a cover plate sleeve is detachably connected to the mounting plate, and the cover plate sleeve is arranged outside the mounting plate in a sleeving mode and seals the mounting groove. By arranging the guide plate, the upper oil tank has enough area for adding oil, the oil entering the oil storage groove along the guide plate does not make contact with the monofilament, and then the guide plate can be contained in the mounting groove again after being used, so that the guide plate does not increase the space occupied by the periphery of the upper oil tank; and meanwhile, the contact between dust and the flow guide plate can be reduced.

The invention discloses a material for improving impervious and self-healing functions of concrete and a preparation method of the material. The material is prepared from 8-10 parts of polypropylene fibers, 30-35 parts of a magnesium expansion material, 30-35 parts of an active low-carbon cementing material, 10-15 parts of a mineral admixture active exciting agent, 3-5 parts of sodium carbonate, 1-2 parts of calcium formate, 3-5 parts of a catalyst and 1-2 parts of a penetration enhancer. The polypropylene fiber is monofilament or reticular modified polypropylene fiber, the length is 6-19mm, and the diameter is 18-48; the active low-carbon cementing material is one or more of granulated blast furnace slag micro powder or I-grade fly ash; the catalyst is an aluminate compound and is used for accelerating the reaction process of active substances, calcium ions and water. The water penetration resistance of the concrete is remarkably improved by exciting the activity of the active low-carbon cementing material in the concrete, pores and cracks in the concrete can be effectively filled, and the self-repairing and healing capacity of the concrete is improved.

The utility model relates to the technical field of glass fiber production, in particular to a cooling fin beam splitting device which comprises a pair of handles and further comprises a filament splitting sheet, the upper ends of the handles are hinged to each other, and the handles are opened and closed around the hinge point; mounting grooves are formed in the tops of the handles, the mounting groove in one handle horizontally extends rightwards to form a long groove structure, and the mounting groove in the other handle horizontally extends leftwards to form the other long groove structure; a plurality of yarn separating sheets are detachably arranged on each mounting groove, and the plurality of yarn separating sheets are parallel to one another; according to the cooling fin bundle splitting device, the filament splitting sheets replace fingers to allocate and gather needed monofilaments, it is guaranteed that the number of the monofilaments allocated to each bundle of yarn is accurate, the problem that filament splitting errors are prone to occurring in the traditional bare-handed bundle splitting process is solved, and product quality is improved.

To provide a polyethylene fiber suppressed in fiber unevenness and fusion and excellent in resistance.SOLUTION: A polyethylene fiber having a minimum rate of 1 * 10 - 8 sec - 1 or less in a measurement in which a diameter (μm) of a single yarn fineness is a horizontal axis, a frequency (%) is a vertical axis, and a half width of a peak including a diameter of a mode value with respect to a diameter indicating the mode value of a distribution curve is 0.1 to 0.7, the measurement temperature is 20 °C, and the measurement load is 800 MPa.SELECTED DRAWING: Figure 1

The utility model discloses an adjustable wire guide mechanism of a steel platform, the wire guide mechanism is mounted at an opening of the steel platform, a hot roller and a network device are arranged above the steel platform, a winding machine is arranged below the steel platform, and a winding wire guide hook is arranged above the winding machine; the wire guide mechanism comprises a mounting plate fixedly mounted at the opening of the steel platform and a movable wire guide hook slidably mounted on the mounting plate, the movable wire guide hook is fixedly connected with a sliding block, and the sliding block is arranged in the sliding groove; in the first horizontal direction, the size of the sliding block is smaller than that of the sliding groove, so that the movable guide wire hook can slide in the first horizontal direction; the movable yarn guide hooks are in one-to-one correspondence with the yarn guide hooks of the winding machine in the vertical direction; the tows passing through the hot roller and the interlacer sequentially pass through the movable tow guide hook and the winding tow guide hook to enter the winding machine; and the tows passing through the movable tow guide hook vertically enter the winding tow guide hook. According to the filament guide mechanism, FDY filament cakes with few holes and ultra-thick denier monofilaments can be formed to be symmetrical on the left side and the right side, and filament stumbling is avoided.

The present application belongs to the technical field of textiles, and relates to a preparation method of a polyester fabric with a gradient dyeing effect, which comprises the following steps: after a fabric is woven from dynamic profiled yarns, the fabric is subjected to desizing and scouring treatment, and then is subjected to heat setting; subsequently, the heat-set fabric is immersed in a dye bath containing disperse dyes, and is subjected to dyeing by using a high-temperature and high-pressure dyeing method, so as to obtain a polyester fabric with a gradient dyeing effect; the cross-sectional shape of the monofilament of the dynamic profiled yarns periodically changes along the length direction, and the cross-sectional shape of the monofilament on each period is circular, flat and triangular in sequence. The present application realizes a differentiated dyeing effect, and simultaneously controls the timing of the nozzles, sets the cross-sectional change period, and makes the monofilament form a regular alternation of 'light-mid-dark' along the length direction, so that the finally prepared fabric presents a gradient dyeing effect after dyeing.

The invention relates to a high-elasticity fabric with high dimensional stability, which comprises a fabric body, a bonding layer and an elastic fabric layer, the fabric body sequentially comprises a skin-friendly layer, an elastic connecting layer and a thermal insulation layer from top to bottom; the skin-friendly layer, the elastic connecting layer and the heat preservation layer are woven into a whole through weft knitting air layer tissue. The bottom end of the fabric body is fixedly connected with the top end of the elastic fabric layer through the bonding layer; the skin-friendly layer is formed by weaving wrap yarns, core yarns of the wrap yarns are spandex filaments, and yarn skins of the wrap yarns are blended yarns formed by uniformly mixing and spinning far infrared heating acrylic fibers / antibacterial viscose fibers; the elastic connecting layer is formed by weaving SORONA monofilaments, the heat preservation layer is formed by weaving hollow polyester filaments, and the elastic fabric layer is formed by vertically interweaving warp yarns and weft yarns in a plain weave structure; the fabric is high in size stability, good in environmental protection property and good in skin-friendly heat retention property.

This product provides a wiping cloth suitable for media cleaning applications that suppresses the increase of particles due to friction during wiping, prevents contamination problems, offers high wiping performance, and leaves minimal residue. [Solution] A wiping cloth made of a fibrous structure using ultrafine polyamide fibers, wherein the single filament fineness of the ultrafine polyamide fibers is 0.7 dtex or less, the content of ultrafine polyamide fibers in the entire wiping cloth is 40% by mass or more, and the average number of airborne particles with a diameter of 0.1 μm or more is 10 particles / cm 2 The following is the wiping cloth.

The utility model provides an easy-stripping polypropylene fiber monofilament filter material fiber opening device which comprises a shell, a first cavity is formed in the shell, a first opening assembly and a second opening assembly are rotationally connected in the first cavity, a first opening hole and a second opening hole are formed in the two ends of the shell respectively, the first opening hole is fixedly connected with a feeding pipe, and the second opening hole is fixedly connected with a discharging pipe. The second opening is fixedly connected with a discharging pipe, a discharging channel is formed in the discharging pipe, the end, away from the second opening, of the discharging channel is fixedly connected with an air pump, and a discharging opening is formed in one end of the discharging channel. According to the scheme, the opening roller and the opening cylinder which are opposite in rotation direction are rotationally arranged in the first cavity, and the opening cylinder eccentrically rotates relative to the opening roller, so that the distance between a first opening cutter arranged on the outer circular surface of the feeding hopper and a second opening cutter arranged on the outer circular surface of the second cavity is changed along with rotation of the opening roller; therefore, the purpose of improving the opening efficiency and the opening effect is achieved.

The utility model discloses a durable spiral net with stable air permeability, which comprises a left-hand spiral ring (1) and a right-hand spiral ring (2) which are wound by monofilaments, and the left-hand spiral ring (1) and the right-hand spiral ring (2) are sequentially and circularly crossed together to form a crossed hole (3) which is penetrated by string ring monofilaments (4) to form the spiral net. A corresponding cross-linking core wire (5) is inserted into the left-hand spiral ring (1) in the same column and / or a corresponding cross-linking core wire (5) is inserted into the right-hand spiral ring (2) in the same column, the cross-linking core wire (5) comprises a plurality of cross-linking monofilaments (51) which are arranged in parallel, and the cross-linking monofilaments (51) are fixedly connected through cross-linking points (52) to form the cross-linking core wire (5). According to the durable spiral net with the stable air permeability, the stability of the air permeability of the net surface can be guaranteed in the solid-liquid separation machining process, the solid-liquid separation efficiency is improved, meanwhile, the strength of the net surface is enhanced, the spiral net is durable, and the service life is prolonged.

This invention relates to the field of building materials technology, and discloses a waterproof and crack-resistant dry-mixed mortar and its preparation method. The mortar is composed of cement, graded manufactured sand, powdered composite waterproofing agent, hydrophobic redispersible latex powder, modified fibers, cellulose ether, and polycarboxylate superplasticizer. The core technology lies in utilizing the hydrolysis and condensation of active silane components to form covalent bonds with the cement matrix and undergo interfacial cross-linking with the latex powder, thereby constructing an organic-inorganic interpenetrating network within the micropores of the mortar. Simultaneously, surface-activated and hydrophilically modified fibers achieve uniform monofilament dispersion in the slurry, constructing a three-dimensional crack-resistant network. The preparation process employs step-by-step feeding and differentiated stirring speeds to protect the carrier structure of the waterproofing agent while ensuring sufficient fiber dispersion. This invention solves the technical defects of traditional mortars, such as short-lasting waterproofing and easy fiber agglomeration, achieving high impermeability, low water absorption, and excellent crack resistance, making it suitable for building waterproofing and crack-resistant projects.

The invention discloses a preparation method of a PLA / PCL-based bio-based enhanced degradable medical monofilament, which mainly comprises the following steps: grafting a sulfonic acid group in a PLA chain segment to modify a PLA material so as to promote degradation, and introducing aminated nano cellulose as a reinforcing filler. And carrying out melt blending on the PLA grafted with the sulfonic acid group, the PCL, the aminated nanocellulose and the bio-based compatibilizer to prepare the bio-based enhanced degradable medical monofilament. The polylactic acid (PLA) / polycaprolactone (PCL) composite fiber disclosed by the invention has the advantages of high mechanical property, rapid degradability and excellent biocompatibility.