562 results about "Melt viscosity" patented technology

The invention discloses a preparation method of an interface-modified flame-retardant polypropylene-based bamboo-plastic composite material. According to the method, a modification solution composed of a polyphenol component and a boron-containing component is adopted, bamboo powder is treated under the normal-temperature stirring condition, and the interface modified bamboo powder is successfully prepared. The mechanism is that polyphenol and a boron-containing component are subjected to a coordination reaction on the surface of bamboo powder, and a reversible borate dynamic covalent bond is constructed. The dynamic bond has a temperature response characteristic: reversible dissociation is realized during high-temperature processing, so that the melt viscosity of a composite system is reduced, and the processing fluidity is improved; the interface bonding force between the bamboo powder and the polypropylene matrix and the mechanical strength of the composite material are remarkably enhanced. In addition, the introduced boron element is used as an efficient flame-retardant component and promotes generation of a compact protective carbon layer during combustion, so that the flame-retardant property of the composite material is comprehensively improved.

The invention belongs to the technical field of temperature control, and discloses a temperature control method and device of a hot runner system for an inverted mold. The method comprises the following steps: defining a critical melt area in a physical sprue which directly influences the product quality in a sprue of a hot runner system as a virtual sprue; dynamically generating a melt viscosity target track of the virtual gate region according to the type of an injection molding material and an injection molding process stage; based on measurable injection molding process parameters and sprue area temperature, estimating a current melt viscosity value of a virtual sprue area in real time through a state observer; calculating to obtain an optimal power control sequence by adopting a multivariable model prediction controller; and driving a sprue area heater according to the optimal power control sequence, so that the actual change of the melt viscosity of the virtual sprue area tracks a melt viscosity target track. According to the invention, the defects such as salivation and wire drawing can be effectively eliminated, so that the sprue quality stability and the production efficiency are improved.

The invention relates to the technical field of process control, in particular to a polyphenylene sulfide polymerizer temperature self-adaptive control method, which comprises the following steps: acquiring melt viscosity, heat release power and residence time deviation of a polymerizer in real time, and constructing a normalized multi-dimensional time sequence input vector by using a sliding window technology; and then, through fusing a weight control model of a long short-term memory network and an attention mechanism, combining static working condition characteristics, and analyzing and outputting adaptive weight coefficients for different deviation dimensions in real time. Meanwhile, based on the shear heat effect and the reaction accumulation effect, specific temperature compensation components for the inlet of the heating medium jacket are calculated, and independent amplitude limiting processing is carried out on all the components. And finally, a target set temperature is synthesized through weighting, and an execution mechanism is driven to act accurately by utilizing cascade PID control and a valve flow characteristic inverse mapping model. According to the invention, through deep fusion and mechanism compensation, accurate steady-state control of the polymerization reaction is realized.

The invention belongs to the technical field of ETFE film preparation, and particularly relates to a preparation method of a high-strength ETFE film. The preparation method of the ETFE film comprises the following steps: preparing a mixture of modified nano cellulose and calcium magnesium silicate whiskers; carrying out modification treatment on the poly (p-benzamide) fiber; and preparing the ETFE film. According to the preparation method of the high-strength ETFE film, the perfluoroalkoxy copolymer and the ETFE resin are selected and mixed for use, during melt extrusion, the perfluoroalkoxy copolymer can lubricate the ETFE and reduce the overall melt viscosity, the critical shear rate of the perfluoroalkoxy copolymer is higher than that of the ETFE, melt fracture can be inhibited, the film is evenly extruded, the flatness of the film surface is improved, and the high-strength ETFE film is prepared. And meanwhile, the elastic retraction of the ETFE is inhibited during high-temperature setting. And the modified nano cellulose and calcium magnesium silicate whisker mixture and the modified poly-p-benzamide fiber are added to enhance the mechanical strength of the prepared ETFE film.

The invention relates to the technical field of aluminum alloy casting, and discloses a rare earth alloying modified 3102 aluminum alloy semi-solid casting method which comprises the following steps: S1, preparing ingredients: firstly preparing a raw material of a 3102 aluminum alloy and then preparing a rare earth element, S2, smelting: sequentially putting the raw material of the 3102 aluminum alloy into smelting equipment according to a sequence, S3, adding the rare earth element, and S4, casting. After the 3102 aluminum alloy raw material is smelted, S4, preparing semi-solid slurry, namely, cooling and stirring a smelted solution through stirring equipment, and adding a grain refiner while stirring until the smelted solution is formed into the semi-solid slurry, S5, performing die casting or injection molding, injecting the semi-solid slurry into a die casting mold of die casting equipment, and S6, cooling and demolding. And S7, heat treatment is conducted, specifically, the demolded casting is subjected to solution treatment, and a protective atmosphere is added. The yield strength and tensile strength of the alloy are improved through mechanisms such as solid solution strengthening, copper and aluminum can form an intermetallic compound to achieve dispersion strengthening, hardness increasing and wear resistance improving, silicon is beneficial for reducing melt viscosity and improving fluidity, and the alloy body performance is further improved through mixing of multiple materials, and the alloy is suitable for being used in various scenes.

The invention relates to the technical field of open-milling granulation production control, and provides an open-milling granulation production process control method and system, and the method comprises the steps: monitoring and recording the flow state parameters of a melt strand at the outlet of a granulator die head in real time; monitoring and recording the driving motor torque and the driving motor rotating speed of an extrusion screw of the granulator in real time, and judging the fluctuation trend of the melt viscosity according to the driving motor torque and the driving motor rotating speed to obtain melt viscosity fluctuation trend information; based on the melt strand flow state parameters and the melt viscosity fluctuation trend information, executing a judgment process of a starting strategy of a feed-forward compensation mechanism to obtain a feed-forward compensation judgment result; according to the feedforward compensation judgment result, the rotating speed of a rotating cutter head of the granulator or the heating power of a die head is adjusted, so that the open milling granulation production process is controlled. The method has the effect of improving the stability of the open milling granulation production process.

The invention relates to a flame-retardant high-temperature-resistant fiber woven fabric and a preparation process thereof, and belongs to the technical field of textiles. The preparation method comprises the following steps: grafting and crosslinking a self-made grafting monomer and polyvinyl chloride, and then weaving to obtain the modified polyvinyl chloride fiber fabric; a phosphate group in the monomer can promote surface carbonization to form a protective carbon layer, silicate generated by decomposition of a siloxy group at a high temperature is combined with the carbon layer to improve the strength and melt viscosity of the carbon layer, and the phosphate group and the siloxy group synergistically enhance the flame retardance and the molten drop resistance of the fabric; a cyclic phosphate group and a pyridine ring are connected to form a rigid structure with relatively high thermal stability, chain segment movement is limited, a plurality of siloxy groups in a monomer are crosslinked to form a crosslinked network, molecular chain segments are difficult to move, and the combination of the rigid group and the crosslinked network improves the high temperature resistance of the fabric and effectively improves the mechanical properties of the fabric; in addition, the positively charged quaternary ammonium salt structure in the monomer improves the antistatic performance of the fabric, and cooperates with trifluoromethyl to destroy the structural integrity of bacterial cells, so that the fabric achieves efficient bacteriostasis.

The invention belongs to the technical field of temperature control, and provides a temperature control system of a carbon nanotube master batch production line, which comprises a process data acquisition module for acquiring process state data of the production line in the production process of the carbon nanotube master batch; and the dynamic cooperative control module is used for dynamically generating and outputting a cooperative adjustment instruction when the process state data deviates from the control target by taking the preset melt viscosity range and the specific mechanical energy range as the control target based on the obtained process state data. A composite control mode of feed-forward prevention and feedback fine adjustment is formed through feedback adjustment of the disturbance feed-forward compensation module and dynamic cooperative control, technological parameter drift caused by internal and external interference is restrained, a production line can still keep high stability when facing frequent or unpredictable disturbance, and the reject ratio of products is reduced.

The invention discloses a basalt fiber wiredrawing control method, system, equipment and medium, and relates to the technical field of control systems.The basalt fiber wiredrawing control method comprises the steps that a preset time period is set, a current moment and a historical moment are obtained, a historical wiredrawing diameter data sequence is obtained, and a stability index is obtained; if the stability index exceeds a preset threshold value, a historical melt viscosity data sequence is obtained, the viscosity change direction is obtained, and the wire drawing diameter change direction is obtained; if the diameter change direction is decreased, the minimum viscosity value is obtained, a first pretreatment reference viscosity value is formed, the viscosity value of the to-be-monitored melt is obtained, and if the viscosity value of the to-be-monitored melt is smaller than the first pretreatment reference viscosity value, the temperature of the bushing plate is decreased; if the diameter change direction is increased, the maximum viscosity value is obtained, a second pretreatment reference viscosity value is formed, the viscosity value of the to-be-monitored melt is obtained, and if the viscosity value of the to-be-monitored melt is larger than the second pretreatment reference viscosity value, the temperature of the bushing plate is increased. The device has the advantages that the wire drawing quality is improved, the energy efficiency is optimized, and the control is accurate.

The invention discloses a basalt fiber wiredrawing adjusting method, system, equipment and medium, and relates to the technical field of basalt fiber wiredrawing control, and the basalt fiber wiredrawing adjusting method comprises the following steps: obtaining melt viscosity in a pouring furnace; judging whether the melt viscosity is within the range of a preset viscosity threshold value or not, if yes, returning to obtain the melt viscosity in the pouring furnace, and if not, continuously obtaining a plurality of wire drawing state images of the basalt fiber in unit time; according to the multiple wire drawing state images, whether wire drawing abnormal characteristics exist or not is recognized, if not, the operation is returned to the step of obtaining the melt viscosity in the pouring furnace, and if yes, a first temperature adjusting parameter is obtained; wherein the first temperature adjusting parameter is used for adjusting the melt temperature in the pouring furnace; the first temperature adjusting parameter is input into the viscosity-temperature initial curve of the wire drawing process so as to update and obtain the viscosity-temperature target curve, and the method has the advantages that self-adaptive adjustment can be achieved, and the adjusting efficiency is improved.

The invention belongs to the technical field of inorganic mineral fiber preparation, and provides a high-strength and high-modulus inorganic mineral fiber prepared from water-quenched slag and a preparation method of the high-strength and high-modulus inorganic mineral fiber. Firstly, the chemical purity of raw materials is improved through density separation and acid pickling, meanwhile, Na2CO3 and Fe2O3 are added, the tendency of crystal precipitation is reduced, and the vitrification characteristic of water-quenched slag is improved; secondly, the composite oxide modifier further optimizes the structure of the glass network, and B2O3 enhances the chemical stability of the glass network and reduces the melt viscosity by forming a B-O-Si bond; y2O3 provides high electric field intensity, inhibits crystal precipitation and enhances the crosslinking degree of a network; v2O5 provides a redox buffer function through a variable valence state, so that the chemical environment in the melting process is optimized, and the creep resistance is improved; and finally, a compact Al2O3 coating is formed on the surface of the fiber, so that the mechanical strength, the oxidation resistance, the corrosion resistance and the high-temperature stability of the fiber are improved.

The invention provides a dimer acid type polyamide hot melt adhesive and a preparation method thereof. The polyamide hot melt adhesive comprises the following components in parts by weight: 50-90 parts of dimer acid, 5-40 parts of dicarboxylic acid, 45-130 parts of diamine, 1-10 parts of a catalyst and 5-20 parts of an antioxidant. The polyamide hot melt adhesive disclosed by the invention has relatively high softening point and melt viscosity, the adhesive property of the polyamide hot melt adhesive can be improved, and the polyamide hot melt adhesive has relatively high tensile strength and elongation at break, so that the polyamide hot melt adhesive is excellent in mechanical property and relatively wide in application range.

The invention provides a thermoplastic polyimide prepreg preparation method and a special device thereof, and the preparation method comprises the steps of unwinding, cloth storage and desizing, primary impregnation, secondary impregnation, pre-drying, tertiary impregnation, drying and the like. The solvent method for preparing the high-performance thermoplastic prepreg is realized, and the problems that the prepreg is low in resin content, insufficient in impregnation, insufficient in flatness, easy to have air holes, hard spots and the like are solved; the method is high in preparation efficiency and low in abrasion, and the prepared prepreg fiber is uniform in impregnation, flat and smooth in surface and uniform in thickness, has high strength and impact resistance, can be stored for a long time and can be recycled; the method is suitable for manufacturing the resin prepreg which is high in melt viscosity and can be dissolved in a proper single or mixed solvent, and the prepared prepreg can be applied to manufacturing of light-weight high-performance parts in the fields of rail transit, aerospace, weapons and the like.

The invention provides an inorganic fiber prepared from industrial solid waste and a preparation method thereof, and belongs to the technical field of inorganic fiber preparation. According to the rare earth doped low-temperature co-melt, a silicon-oxygen network is destroyed and stabilized, the viscosity of solid waste melt is reduced, phase splitting is inhibited, and a uniform melt environment is created; the viscosity of the carbon-coated composite nanoparticles is reduced through in-situ carbon thermal reduction reaction in a synergistic manner, and meanwhile, a reactant gas is utilized to clarify a melt, so that internal defects are removed; the apatite surface modified core-shell nanocrystal is used as a microstructure construction core, a fine and uniform microcrystalline phase is formed in the fiber through induction, and a high-strength basis of the material is constructed; homogenization of the low-temperature co-melt is the premise of subsequent uniform dispersion of additives, core-shell nanocrystals construct a high-strength microcrystalline matrix, carbon-coated particle cores are positioned at a phase interface, the fibers are endowed with high toughness through a physical mechanism, and comprehensive mechanical properties are improved through cooperation of the core-shell nanocrystals, the carbon-coated particle cores and the core-shell nanocrystals.

The present invention discloses a recyclable bio-based thermosetting polyurethane hot melt adhesive and its preparation method, which includes vegetable oil polyol, poly(propylene carbonate) diol, polyester polyol, macromolecular thermoplastic tackifying resin, isocyanate, furan compound containing active hydrogen, and bifunctional bismaleimide. First, the present invention reacts vegetable oil polyol, poly(propylene carbonate) diol, polyester polyol, and macromolecular thermoplastic tackifying resin with diisocyanate to generate a polyurethane prepolymer. Subsequently, the furan compound containing active hydrogen is reacted with the above prepolymer. Finally, bifunctional bismaleimide is added to form a dynamic covalent polymer therewith. The prepared bio-based thermosetting polyurethane hot melt adhesive has a low melt viscosity, a high ultimate peel strength, and recyclable characteristics. Some raw materials of the present invention are derived from biomass and renewable materials, which improves the green sustainability of the product's entire life cycle.

The invention provides a high-flowability reclaimed material modified PET injection molding material and a molding method thereof. Comprising the following steps: mixing the following components in percentage by weight: 65%-70% of recycled PET, 8%-12% of a PET-BA block copolymer, 2%-4% of a bifunctional polar chain extender, 1%-3% of a nitrogen-doped MXene nanosheet, 3%-6% of a thermally induced reversible Diels-Alder structural monomer, 8%-12% of a plasma modified POE-g-COOH toughening agent, 2%-4% of a polyester-amino silane grafted elastomer and 1%-3% of an efficient phosphate metal salt nucleating agent, by adding the PET-BA block copolymer, the nitrogen-doped MXene nanosheet and the Diels-Alder structural monomer, the melt viscosity of the material is remarkably reduced, the fluidity is improved, and the resistance in the injection molding process is reduced; according to the present invention, the difunctional polar chain extender and the plasma modified POE-g-COOH toughening agent are adopted to enhance the tensile strength, the impact toughness and the bending modulus of the recovered PET so as to make the material meet various molding requirements, and the nitrogen-doped MXene nanosheet and the efficient phosphate metal salt nucleating agent are added to improve the thermal conductivity and the crystallization rate of the material.

To provide a thermosetting maleimide resin composition which has low melt viscosity during heating, has excellent flexibility of the cured film in its cured product, has low dielectric constant and dielectric loss tangent, has high glass transition temperature, has a low coefficient of thermal expansion, and has excellent long-term heat resistance and moisture resistance.SOLUTION: A thermosetting maleimide resin composition contains (A) a bismaleimide compound represented by the following formula (1) (in the formula (1), A represents a tetravalent organic group including a cyclic structure, B represents a divalent hydrocarbon group derived from a dimer acid skeleton, Q represents a divalent group having a fluorene skeleton or an indene skeleton, W is B or Q, n is 1 to 100, and m is 1 to 100, (B) a thermosetting resin having one or more maleimide group reactive functional groups selected from an alkenyl group, a maleimide group, an epoxy group, a cyanate group, a hydroxyl group, an acid anhydride group, a (meth)acrylic group and a thiol group, and (C) a reaction accelerator.SELECTED DRAWING: None

The invention relates to the field of high polymer materials, and discloses an antistatic polyether-ether-ketone composite material for semiconductor devices, the antistatic polyether-ether-ketone composite material comprises the following raw materials by weight: 60-70 parts of polyether-ether-ketone, 20-30 parts of polyetherimide, 3-5 parts of modified carbon nanotubes, 2-4 parts of nano core-shell particles, 0.5-1 part of a coupling agent, and 0.2-0.5 part of an antioxidant; the modified carbon nanotubes are obtained by acidizing carbon nanotubes and grafting imidazolyl quaternary ammonium salt on the surfaces of the acidized carbon nanotubes; according to the antistatic polyether-ether-ketone composite material, through blending of polyetherimide, the melt viscosity of a composite system can be reduced, the problems that polyether-ether-ketone is high in processing temperature and poor in flowability are solved, and the antistatic performance of the composite material is improved. Through the synergistic interaction of the added modified carbon nanotubes and nano core-shell particles, the material is endowed with excellent mechanical properties, wear resistance and antistatic properties.

The invention relates to the field of high polymer materials, and particularly provides a polyphenylene sulfide oligomer long-chain branching modification method, two chain extenders, namely a chain extender A and a chain extender B, are added, the chain extender A can increase the molecular chain length of polyphenylene sulfide, and the chain extender B increases the branching degree of the molecular chain while increasing the molecular weight length, so that the polyphenylene sulfide oligomer long-chain branching modification effect is improved. The molar mass of the polyphenylene sulfide oligomer is increased under the combined action of the two, the toughness of the polyphenylene sulfide is improved while the melt viscosity is improved, and in addition, the toughness of the material is further improved while the cost is reduced by adding nano calcium carbonate. Compared with thermal oxidation crosslinking, the preparation method has the advantages of short treatment time and high production efficiency, and compared with other blending modification, the preparation method has the advantages that high-molecular-weight polyphenylene sulfide does not need to be added, and the mixing process is simple.

The present invention relates to a high temperature resistant thermosetting polyimide adhesive and a preparation method thereof, wherein a polyimide prepolymer containing a nitrogen heterocyclic structure is prepared, and then a metal salt is added to prepare a coordination prepolymer adhesive, and finally a high temperature resistant thermosetting polyimide adhesive is obtained by thermal crosslinking. The thermosetting polyimide adhesive prepared by the present invention utilizes the dynamic "dissociation / complexation" process of coordination bonds under a temperature field, so that it has a lower melt viscosity in the melt and gives it excellent wettability; due to the coordination crosslinking effect, it not only has a higher glass transition temperature, but also can significantly increase its bonding performance due to the coordination effect.

The invention discloses a high-temperature melt viscosity testing device and method, and the testing device comprises a testing box; a visual assembly is arranged on one side of the test box; an adjusting mechanism, wherein the test box and the visual assembly are arranged above the adjusting mechanism; collecting the change state of the material in the test box through the visual component, and calculating the viscosity of the material; image data of materials in the testing box can be monitored in real time through the visual assembly, the viscosity of the materials is calculated according to the change of size data, the testing box can control the temperature and atmosphere, the high-temperature melt viscosity in different testing environments can be conveniently adjusted, testing is easy and convenient, the sample preparation size is small, and the testing time is short.

The invention provides a modified polyvinyl chloride reinforced chlorinated polyvinyl chloride composite material and a preparation method thereof, and belongs to the technical field of high polymer material modification. The preparation method comprises the following steps: grafting a flexible chain segment of an ethylene-vinyl acetate copolymer (EVA) onto a polyvinyl chloride molecular chain to obtain modified polyvinyl chloride, and then blending the modified polyvinyl chloride with chlorinated polyvinyl chloride to obtain the modified polyvinyl chloride reinforced chlorinated polyvinyl chloride composite material. According to the chlorinated polyvinyl chloride composite material, the compatibility of polyvinyl chloride and chlorinated polyvinyl chloride is improved by introducing a polar group; according to the invention, by adjusting the proportion of the modified polyvinyl chloride in the chlorinated polyvinyl chloride composite material, the mechanical properties and processability of the composite material are balanced, the melt viscosity is reduced, and the chlorinated polyvinyl chloride composite material has good practicability.

A temperature sensor comprising a housing that receives a temperature measuring element is provided. The housing includes a polymer composition comprising a polymer matrix that includes a thermotropic liquid crystalline polymer. The polymer composition exhibits a melt viscosity of about 150 Pa−s or less and a deflection temperature under load of about 170° C. or more.

The invention relates to the technical field of plastic recycling, and discloses circulating nested plastic corner recycling injection molding equipment which comprises a machine base, a main machine barrel with a machine head at the left end is mounted at the upper end of the machine base through a mounting base, an exhaust screw is rotatably mounted on the inner wall of the main machine barrel, and a synchronous heating part is arranged on the outer wall of the exhaust screw. The circulating nested type plastic leftover material recycling injection molding equipment can effectively solve the problems that in the prior art, large-particle-size fragments which are not fully molten are prone to blocking a filter screen, a production line is forced to be frequently shut down to remove obstacles, the continuous production capacity is seriously restricted, particle size distribution dispersion of recycled leftover materials is high, and the production efficiency is high in the melting and mixing stage before injection molding. Due to heat conduction difference among particles, local plasticizing is insufficient or excessive degradation is caused, so that a final plastic product has apparent defects such as flow marks and mechanical property defects; and the recovered leftover material melt has high viscosity and is difficult to diffuse quickly after being directly put into a new plastic melt, so that the local concentration of the fused plastic melt is too high or too low.

The invention discloses a polyaryletherketone copolymer and a preparation method thereof, the polyaryletherketone copolymer provided by the invention comprises a repeating unit in a formula I, a repeating unit in a formula II and a terminal unit, the repeating unit in the formula I comprises a 1, 4-naphthalene diphenol structure, and the molar ratio of the formula I to the formula II is 55: 45-95: 5. According to the polyaryletherketone copolymer, a 1, 4-naphthalene diphenol structure is introduced, so that the melting point is reduced while the high-temperature-resistant characteristic is maintained, the regulation and control of the melting point and the melt viscosity are realized at lower cost, and the polyaryletherketone copolymer is more suitable for industrial application such as carbon fiber impregnation and the like.

Disclosed is a fluorine-based resin film which has a melt viscosity η of 600 Pa∙s to 4,000 Pa∙s inclusive as measured at a measurement temperature of 260°C and a measurement shear rate of 50 s-1. The fluorine-based resin film has a surface roughness height Rz of 0.50 μm or less as measured in accordance with JIS B 0601 (2001), and the number of foreign substances having a size of 100 μm or more is 7 per 0.25 m2 or less, the size being the arithmetic average value of the maximum width and the minimum width when the film is viewed in plan.

The present invention provides a sealing sheet for solar cell modules that offers a desirable level of molding properties, heat resistance, and effectively suppresses defects during hot press processing. [Solution] A encapsulating sheet for solar cell modules, with a polyolefin resin as the base resin, a melting point of 55°C to 120°C, a temperature difference of 20°C or less between the extracellular melting initiation temperature and the melting point, and a shear rate of 2.43 × 10 sec measured at 190°C. -1 The solar cell module comprises a sealing sheet having a melt viscosity of 1000 Pa·s or more and 4000 Pa·s or less, preferably with a gel fraction of 10% or less, and at least one of the front sealing layer and the back sealing layer being composed of the sealing sheet.

The present invention provides a curable composition with excellent thermal expansion resistance when used in prepreg applications, as well as prepregs, resin films, metal-clad laminates, printed circuit boards, semiconductor packages, and a method for adjusting melt viscosity. [Solution] The resin contains at least two compounds that have different structures from the compounds represented by general formula (1), and R is present in the resin. 1 , R 2 and R 3 At least one of them is a vinylbenzyl group, and R present in the resin 1 , R 2 and R 3 A curable composition comprising a resin (A) in which at least one of the members is an arylalkyl group other than a vinylbenzyl group, an azo radical polymerization initiator (B), and an imidazole compound (C).

The invention discloses a conductive polyester fiber and a preparation method and application thereof, and relates to the field of functional fibers.The conductive polyester fiber is of a skin-core structure, a core layer component comprises first polyethylene glycol terephthalate, and a skin layer component comprises second polyethylene glycol terephthalate, a first polyamide elastomer and conductive carbon black masterbatch; the conductive carbon black master batch comprises a second polyamide elastomer and conductive carbon black; the zero-shear viscosity difference value of each polyamide elastomer and each polyethylene glycol terephthalate is controlled, so that the melt viscosity of the polyamide elastomer is lower than that of the polyethylene glycol terephthalate, and the low-viscosity polyamide elastomer is easy to diffuse to the surface of the fiber in the spinning process to drive the conductive carbon black to be enriched on the surface of the fiber; a hard segment in the polyamide elastomer can be crystallized in the stretching and drafting process, so that the conductive carbon black is promoted to be transferred to an amorphous region and enriched; practice shows that the fiber disclosed by the invention not only has excellent conductivity, but also has properties such as lasting stability and excellent mechanical properties.

This invention relates to the field of polymer material processing and blending technology, and discloses a fiber uniform mixing process in the preparation of bio-based materials. The process includes: controlling the barrel wall temperature of the main dispersion zone of a co-rotating twin-screw extruder to be lower than the intrinsic melting point of the polylactic acid matrix and turning off the external heater; adding jute fiber bundles and the polylactic acid matrix and controlling the screw speed, utilizing the frictional heat balance temperature difference generated by mechanical shearing to maintain the actual melt temperature above the intrinsic melting point; and conveying the mixture to the secondary diffusion zone as the motor drive torque increases, thereby increasing the barrel wall temperature of the secondary diffusion zone and reducing the screw speed to blend the materials. This invention eliminates temperature control lag, maintains a stable shear flow field, avoids a sudden drop in melt viscosity to improve fiber dispersion uniformity, automatically indicates process stage transitions, avoids material thermal degradation, and improves the stability of the mechanical properties of the finished material.