384 results about "Melt mixing" patented technology

The invention relates to the technical field of control systems, in particular to a melt mixing parameter real-time feedback control system for color master batch production. The method comprises the following steps: acquiring a corresponding process parameter reference through a parameter reference setting module; carrying out risk assessment through a grading module to obtain risk grades and carrying out grading processing; constructing a global optimization model through a control sequence module; a target evolutionary algorithm is started in combination with the technological parameter benchmark, and the technological parameter adjustment amount is calculated and a regulation and control sequence is generated by analyzing the dynamic coupling correlation among the technological parameters and the comprehensive influence on the whole; and finally, the process parameters are adjusted through a closed-loop control module, and real-time closed-loop feedback control is formed. The defects exist in real-time feedback and accurate control links of parameters in a color master batch melting and mixing process. Therefore, the invention provides a melt mixing parameter real-time feedback control system for color master batch production.

The invention relates to the technical field of injection molding waste plastic recovery, in particular to injection molding equipment and a process for producing plastic automobile ornaments. The equipment comprises an injection machine and an online recycling mechanism, the injection machine is provided with a double-channel solution cavity composed of a new material main runner and a waste material returning cavity, and the tail ends of the two channels converge in a 30-degree Y shape; the on-line recovery mechanism comprises a waste conveyor belt, a crushing mechanism and a transmission device, a magnetic separation impurity removal device is arranged in the crushing mechanism, and a discharge end is connected with the batching mechanism. Through double channels and a Y-shaped confluence structure, production waste is subjected to online recovery and crushing and then is fused, mixed and reused with new materials, the waste utilization rate is increased, and the cost is reduced. The magnetic separation and impurity removal device efficiently removes metal impurities through the movement of inclined avoiding, rotary impurity scraping and inclined discharging of a scraping plate; the batching mechanism removes dust to prevent impurities from affecting melt performance. The crushing device adapts to different waste materials, airflow assists discharging to improve the efficiency, and the green production concept is met.

The invention discloses a multilayer co-extrusion heat-shrinkable film and a preparation method thereof, the film comprises an outer wear-resistant layer, a middle support layer and an inner functional layer, the thickness ratio of each layer is 1: 3: 1-1: 5: 1, the total thickness is 50-150 [mu] m, and the raw materials are prepared according to respective formulas. The preparation method comprises the steps of raw material preparation, melt mixing, die head extrusion, two-way stretching, water-cooling shaping, electronic crosslinking, aging treatment, heating softening and cold and hot shaping. The carbon nanotubes (CNT) and the h-BN nanosheets synergistically hinder crack propagation in the middle layer, so that the crack propagation resistance of the film is remarkably improved, the tensile strength, the thermal shrinkage rate and other properties are also optimized, compared with a traditional film, the comprehensive properties of wear resistance, high strength and high thermal shrinkage rate are achieved through interface collaborative design, meanwhile, the production cost is reduced by 20-30%, and the application prospect is wide. The method is suitable for food packaging, electronic device protection and other fields.

The present application relates to the technical field of bio-based polymer material, and more particularly to a full bio-based PBAT-PLA copolymer, a preparation method and an application thereof, which is prepared by melt mixing bio-based polybutylene adipate terephthalate, bio-based polylactic acid and bio-based multi-epoxy chain extender through a twin-screw extruder, so that the tensile strength of the full bio-based PBAT-PLA copolymer is 31.5-44.3 MPa, and the elongation at break is 85-498%. The bio-based multi-epoxy chain extender prepared by specific selection can simultaneously improve the tensile strength and elongation at break of the full bio-based PBAT-PLA copolymer, and solve the technical problems of poor compatibility of traditional bio-based polylactic acid and non-bio-based polybutylene adipate terephthalate, and the technical problem that the addition of existing chain extenders cannot simultaneously improve the tensile strength and elongation at break of the copolymer.

The invention provides a high-wear-resistance and low-dilution gas shielded welding wire and a preparation method thereof, and belongs to the technical field of welding wire manufacturing. The welding wire consists of the following raw materials in parts by weight: 45-52 parts of iron; 18-22 parts by weight of an electrolytic nickel plate; 6-8 parts by weight of high-purity molybdenum powder; 4-6 parts by weight of nano tungsten powder; 3-4.5 parts by weight of a vanadium nitride alloy; 1.2 to 1.8 parts by weight of a niobium-iron alloy; 0.8-1.5 parts by weight of aluminum magnesium alloy powder; 0.3 to 0.6 part by weight of lanthanum cerium mixed rare earth; 0.15 to 0.25 part by weight of ferroboron alloy; 0.5 to 0.8 part by weight of metal silicon powder; 0.2 to 0.4 part by weight of a magnesium-calcium alloy; and 0.1-0.3 part by weight of titanium hydride powder. The hard framework is formed through gradient distribution of carbides such as molybdenum, tungsten and vanadium, the wear-resisting life is remarkably prolonged, melting mixing of base metal is reduced through the nickel-based alloy, the consistency of deposited metal components is ensured, free hydrogen is fixed through hydrogen trap phases such as titanium and niobium, and a moisture absorption path is blocked in combination with a surface passivation film.

The invention discloses a supercritical foaming PHA / PBAT composite material as well as a preparation method and application thereof. The composite material comprises the following components in parts by weight: 60-90 parts of polyhydroxyalkanoate; 10 to 40 parts of poly (adipic acid) / butylene terephthalate; 0.5 to 2.0 parts of a chain extender; 0.2 to 0.8 part of a self-assembly nucleating agent; and 0.1 to 0.5 part of an anti-hydrolysis agent. The preparation method comprises the following steps: mixing the components, melting, mixing and extruding, carrying out underwater pelletizing to obtain modified particles, drying, and carrying out supercritical foaming to obtain the foaming material. The obtained foaming material is bonded with beads through a steam forming technology, the degradable thin-wall plastic cup with the heat insulation performance is prepared, and the problem that in the foaming process of an existing material, phase separation is likely to happen, the cell density is low, and the product particle size is large, so that the thin-wall plastic cup is difficult to form is solved.

The invention discloses a high-toughness PPR pipe machining device which comprises an extrusion system, a pulsation mixing system, a melt online monitoring device, a sizing cooling system, a traction device and a winding device. The extrusion system is used for melting and conveying raw materials, and the pulsation mixing system is used for deeply mixing a melt by utilizing a periodic disturbance structure, so that a toughening agent and a copolymerization component are more uniformly dispersed in the melt. The melt on-line monitoring device can detect the temperature, pressure and dispersity of the melt in real time, so that the extrusion process is monitorable. The sizing cooling system adopts a subsection cooling mode of rapid cooling, constant-temperature slow release and low-temperature shaping, and stable shape control is achieved through vacuum sizing. The traction device and the winding device are used for keeping the production rhythm stable and achieving continuous winding of the formed pipe. According to the invention, the melt mixing quality can be improved, the cooling internal stress is reduced, and the toughness and dimensional stability of the PPR pipe are improved.

The invention relates to a corrosion-resistant polypropylene modified plastic and a preparation method thereof, and belongs to the technical field of polypropylene plastic modification. The modified plastic is prepared from isotactic polypropylene, exfoliated montmorillonite, polyvinylidene fluoride powder, anhydride grafted polypropylene, a beta-crystal nucleating agent, diethyl aluminum chloride, peroxide, hindered phenol, phosphite ester and N, N-distearoyl hydroxylamine. The preparation method comprises the steps of low-shear melting and blending, high-shear supercritical COviscosity reduction, vacuum exhaust, bidirectional orientation, infrared local crosslinking, co-extrusion cooling and the like. The obtained material is excellent in tensile strength, elongation at break, low-temperature impact strength, strong acid corrosion resistance and the like.

The invention relates to the technical field of high polymer materials, and discloses a preparation method of a modified master batch degradable material and application of the modified master batch degradable material in a packaging lunch box, and the modified master batch degradable material comprises the following components by mass: 75.0-93.8 parts of poly (butylene succinate); 5.0 to 20.0 parts of aliphatic series-aromatic copolyester; 1.0 to 4.0 parts of 1, 1 '-methylenebis-4, 1-phenylene-bismaleimide, and 1.0 to 4.0 parts of 1, 1'-methylenebis-4, 1-phenylene-bismaleimide; 0.5 to 2.0 parts of talcum powder; the method comprises the following steps: mixing dried poly (butylene succinate), aliphatic-aromatic copolyester, bismaleimide and talcum powder, performing reactive extrusion and melt mixing through a twin-screw extruder, and then cooling, pelletizing and drying the extrudate. Through specific components and a reactive extrusion process, a dynamic cross-linked network is formed by utilizing a Diels-Alder reaction, and the modified master batch degradable material of which the comprehensive mechanical property and the heat resistance are remarkably improved is prepared.

The invention discloses a preparation method of a mute tube core layer and a mute tube. The preparation method comprises the following steps: step 01, adding 15-55 parts by weight of polypropylene resin, 0.5-10 parts by weight of a coupling agent, 0.5-5 parts by weight of a lubricant, 0.05-1 part by weight of an antioxidant and 0.1-3 parts by weight of other additives into a twin-screw extruder from a main feeding port of the twin-screw extruder, and melting and mixing to form an intermediate melt; 02, 45-85 parts by weight of barium sulfate is added into a double-screw extruder through at least two side feeding ports of the double-screw extruder, the barium sulfate and the intermediate melt are subjected to melt blending, and a blended melt is formed; and step 03, extruding the blended melt by a twin-screw extruder, and sequentially passing through a melt pump and a pipeline core mold to form the pipe core of the mute pipe. According to the preparation method, the filling proportion of barium sulfate is increased to 70% or above, the material density is larger than 2.4 g / cm < 3 >, and the noise test of a drainage pipe system of the mute pipe prepared through the preparation method is smaller than 20 dB.

The invention discloses a preparation method of a low-dielectric-constant and high-heat-resistance LCP composite material for communication equipment. The preparation method sequentially comprises the following steps: S1, preparing the following raw materials in parts by mass: 50-80 parts of a liquid crystal polymer, 1-10 parts of glass fibers, 10-20 parts of inorganic fibers, 0-2 parts of a surface treating agent and 0.5-2 parts of a processing aid; S2, treating the surfaces of the inorganic fibers by adopting the surface treating agent; s3, mixing the liquid crystal polymer and the processing aid in a rotary mixer in proportion, and feeding from a main feed opening of the double-screw extruder; the preparation method comprises the following steps: mixing glass fibers and inorganic fibers according to a certain adding ratio by a mixer, feeding from a side feeding port of an extruder by a screw feeder, and carrying out melt mixing extrusion granulation. According to the invention, the defect that the LCP is easy to bubble after being involved in water vapor is overcome, the use temperature of the material is increased, and the application range of the LCP in a low-dielectric material in mobile phone components is widened.

The invention discloses a degradable bamboo-plastic composite food packaging film as well as a preparation method and application thereof, and belongs to the technical field of packaging film materials. The preparation method of the degradable bamboo-plastic composite food packaging film comprises the following steps: (1) mixing silanization modified bamboo powder, poly (butylene adipate-co-terephthalate) and polycaprolactone, and then carrying out melt mixing granulation treatment to obtain bamboo-plastic mixed master batches; and (2) carrying out film blowing treatment on the bamboo-plastic mixed master batch to obtain the degradable bamboo-plastic composite food packaging film. The degradable bamboo-plastic composite food packaging film prepared by the invention has excellent mechanical property and barrier property, also has antibacterial property, can be used for packaging fresh meat products or fruits and vegetables, is favorable for realizing high-valued application in the field of food, and assists in high-quality development of bamboo instead of plastic in the field of food packaging film products.

The invention belongs to the technical field of glass materials, and particularly relates to black high-hardness heat-resistant microcrystalline glass ware and a preparation method thereof. Silicon dioxide, sodium oxide, aluminum oxide, potassium oxide, boric oxide, magnesium oxide, calcium oxide, zinc oxide, sodium fluosilicate, iron oxide, manganese oxide, fluorite, lithium oxide, metal manganese coated with silicon dioxide and schorlite are used as raw materials, and the black high-hardness heat-resistant microcrystalline glass ware is prepared through the processes of high-temperature melting and mixing, compression molding, annealing and tempering. The black high-hardness heat-resistant microcrystalline glass ware is excellent in performance, high in hardness and good in heat resistance, and has potential market value.

The present invention discloses a fluorocarbon powder coating and a preparation method thereof, belonging to the technical field of powder coatings, which comprises the following steps: premixing methyl methacrylate, 2-hydroxyethyl methacrylate, 1H,1H,2H,2H-hexafluorobutyl methacrylate and methyl p-coumarate to obtain a premixed solution; transferring the premixed solution to a reaction kettle, heating up, adding an initiator, carrying out a reaction, filtering, and drying to obtain a modified acrylic resin, then carrying out melt mixing and extrusion to obtain material A; putting PVDF fluorocarbon resin and a filler into a reaction kettle, heating up and stirring to obtain material B, adding material A and modified PMMA, stirring, cooling and pressing into tablets to obtain the powder coating. The fluorocarbon powder coating of the present invention can maintain the advantage of high weather resistance, while also improving the internal compatibility and anti-ultraviolet performance, and enhancing the internal bonding effect of the double-layer powder body.

The invention relates to the technical field of spinning preparation, and discloses cool color master batch gradient blended spinning and a preparation method thereof.The preparation method comprises the steps that the proportion of cool master batches and color master batches is obtained, and the cool master batches and the color master batches are prepared; the preparation method comprises the following steps: performing nano coating treatment on a cool master batch and a color master batch to obtain an optimal synergistic ratio of the cool master batch and the color master batch, dynamically adjusting a blending ratio and a process path, performing programming regulation and control on a cool degree and color shade to execute a partitioned melting and mixing strategy, and performing staged functional component mixing; a gradient color distribution strategy is executed, material distribution in the fibers is adjusted, annular airflow is adopted for cooling, the cooling speed and the cooling flow direction are controlled, and the melt is rapidly shaped; comparing the actual parameters of the generated fiber structure with the target performance demand parameters, and judging whether the color distribution uniformity, the cool feeling performance index and the structural integrity meet preset standards or not; according to the scheme, the diversified requirements of the market for cool feeling and color can be better met.

A process for preparing a fiber reinforced thermoplastic is disclosed. The process includes melting a first thermoplastic and a second thermoplastic in a melting zone of a twin-screw processor, feeding at least one continuous fiber downstream of the melting zone into a melted mixture of the first thermoplastic and the second thermoplastic, incorporating the at least one continuous fiber into the melted mixture in a mixing zone, the mixing zone including at least one wave element having a continuous outer surface in the form of a helical wave, and obtaining the fiber reinforced thermoplastic from the twin screw processor. Further, a fiber reinforced thermoplastic composition prepared by an extrusion process the composition having a density between 1.3 g / cc to 1.7 g / cc and a flexural modulus of at least 4000 MPa is disclosed.

The present invention relates to a high-solid content epoxy molding compound composition, a high-solid content epoxy molding compound and a preparation method and application thereof, wherein the composition comprises the following raw materials in percentage by mass: 88-92% filler, 3-7% epoxy resin, 3-5% phenolic resin, 0.05-0.2% accelerator, 0.1-0.5% stress release agent, 0.1-0.4% colorant, and 0.2-0.4% release agent. The preparation method is as follows: S1 melts and mixes the filler, epoxy resin, stress release agent, and colorant, and obtains a mixture A after crushing; S2 melts and mixes the filler, phenolic resin, accelerator, and release agent, and obtains a mixture B after crushing; S3 melts and mixes the mixture A and the mixture B, and obtains a high-solid content epoxy molding compound after crushing. Compared with the prior art, the epoxy molding compound prepared by the present invention has a high solid content, meets the V-0 flame retardant grade, has a high thermal conductivity, a low thermal expansion coefficient, a low water absorption rate, and good insulation.

The invention relates to a low-color-difference color master batch and a corresponding polyolefin product. The color master batch is mainly suitable for coloring polyethylene and polypropylene films or injection molded parts. According to the invention, epoxidized poly-alpha-olefin with a determined chemical structure is selected as a dispersing agent, and the epoxidized poly-alpha-olefin has an epoxy group with relatively high polarity and a non-polar long carbon chain, and has dispersing and lubricating effects, so that the compatibility of the carrier resin and the polar coloring agent is improved, and the carrier resin and the polar coloring agent are melted and mixed more sufficiently; the color master batch has the advantages of lower color difference, more uniform coloring, more stable coloring performance, bright color and no flow lines in the application of coloring polyolefin products, and meanwhile, the yellowing of the polyolefin products at high temperature is avoided.

The invention belongs to the technical field of non-woven processing, and discloses a melt-blowing spinning die head, a hollow crimped fiber-based flocculus prepared by the melt-blowing spinning die head and a preparation method, the melt-blowing spinning die head comprises a spinneret plate and two gas plates, and the two gas plates are arranged on the two sides of the lower portion of the spinneret plate respectively; the included angles between the planes of the inner sides of the two gas plates and the surfaces of the opposite spinneret plates are respectively recorded as alpha and beta, and the horizontal distances between the outlet ends of the two gas plates and the center of the spinneret orifice are respectively recorded as a and b; alpha ranges from 10 degrees to 45 degrees, beta ranges from 45 degrees to 89 degrees, and alpha is not equal to beta; b is equal to 1.1 a-3a; the preparation method of the hollow crimped fiber-based flocculus comprises the following steps: melt-blowing raw materials are fused and mixed by a screw extruder and then are fed into a melt-blowing metering pump, metered melt is sprayed out by a melt-blowing spinning die head, and the hollow crimped fiber-based flocculus is collected after being stretched by air flow asymmetrically distributed on the two sides and cooled and solidified. The warm keeping performance of the flocculus can be improved while the light and thin characteristics are kept.

The present invention relates to a low-color-difference masterbatch and corresponding polyolefin products. The masterbatch is primarily suitable for coloring polyethylene and polypropylene films or injection-molded parts. The present invention uses an epoxidized polyalphaolefin (PAO) with a defined chemical structure as a dispersant. The epoxidized PAO has highly polar epoxy groups and non-polar long carbon chains, providing both dispersing and lubricating properties. This improves the compatibility of the carrier resin and the polar colorant, allowing for more complete melt mixing of the two. This results in lower color difference, more uniform coloring, more stable coloring performance, and bright, streaky-free color when used to color polyolefin products. Furthermore, it prevents yellowing of the polyolefin products at high temperatures.

This invention discloses a flame-retardant masterbatch and its preparation process, belonging to the field of polymer materials technology. The flame-retardant masterbatch comprises the following raw materials in parts by weight: carrier resin: 65-90 parts, modified magnesium hydroxide: 25-45 parts, colorant: 15-45 parts, dispersant: 1-5 parts, and antioxidant: 0.05-1 part. The preparation steps are as follows: S1, Weigh the carrier resin, modified magnesium hydroxide, colorant, dispersant, and antioxidant according to their weight proportions and add them to a high-speed mixer for uniform mixing to obtain a mixture; S2, Transfer the mixture to a twin-screw extruder, and after melt mixing, extrusion granulation, and drying, obtain the flame-retardant masterbatch. The prepared flame-retardant masterbatch has excellent flame-retardant and mechanical properties, and is stable and durable. Furthermore, the raw materials for preparing the flame-retardant masterbatch are readily available, the processing is simple, and it can be widely promoted.

A process for preparing a fiber reinforced thermoplastic is disclosed. The process includes melting a first thermoplastic and a second thermoplastic in a melting zone of a twin-screw processor, feeding at least one continuous fiber downstream of the melting zone into a melted mixture of the first thermoplastic and the second thermoplastic, incorporating the at least one continuous fiber into the melted mixture in a mixing zone, the mixing zone including at least one wave element having a continuous outer surface in the form of a helical wave, and obtaining the fiber reinforced thermoplastic from the twin screw processor. Further, a fiber reinforced thermoplastic composition prepared by an extrusion process the composition having a density between 1.3 g / cc to 1.7 g / cc and a flexural modulus of at least 4000 MPa is disclosed.

The invention discloses a method for modifying a material. The method comprises the following steps: melting and mixing a plurality of materials to form an alloy material; wherein the multiple materials comprise a first material and a second material; and removing the first material in the alloy material. According to the material modification method provided by the invention, the required alloy structure is directly generated on the base material, so that the problems caused by secondary adhesion are avoided. Particularly, according to the method, various materials are fused and mixed into the alloy, the alloying depth and position can be accurately controlled in a three-dimensional space, the highly-customized microstructure design of the product is achieved, and in other words, the pore structure can be designed through the method.

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 present invention relates to the technical field of foaming materials. Disclosed are a TPU supercritical foaming material and method for fabricating midsoles in footwear. According to the key points of the technical solution, the foaming material comprises the following raw materials in parts by weight: (1) 40-80 parts of polyol; (2) 20-50 parts of isocyanate; (3) 4-12 parts of a chain extender; (4) 0.1-30 parts of a modifier; and (5) a supercritical gas. The method for fabricating footwear midsoles from said raw materials comprises the following steps: S1, mixing, in the described parts by weight, the polyol, the isocyanate, and the chain extender, and compounding the resulting mixture in a twin-screw extruder to obtain a polymer melt; S2, preparing a supercritical gas by means of a gas inlet system, and then injecting the supercritical gas and the polymer melt into a single-screw extruder to prepare a molten mixture containing the supercritical gas; and S3, injecting the molten mixture into a mold, leaving it to stand, and then opening the mold to obtain the product.

The utility model discloses a degradable TPU (Thermoplastic Polyurethanes) melting mixer, which belongs to the technical field of TPU melting, aims at solving the problems that the distance between two crushing rollers cannot be adjusted according to specific actual requirements and materials conforming to particle sizes cannot be circularly crushed, and comprises a box body, an adjusting mechanism, a screening mechanism, a push plate mechanism and a circulating fan, the adjusting mechanism is arranged on the upper middle portion of the interior of the box body, the screening mechanism is arranged below the adjusting mechanism, the push plate mechanism is arranged in the screening mechanism, the circulating fan is arranged in front of the exterior of the screening mechanism, the first motor is fixedly connected to the left side of the box body, and the threaded rod is connected to the output end of the first motor. According to the utility model, the distance between the movable crushing roller and the fixed crushing roller can be adjusted through the arranged adjusting mechanism, so that the device is suitable for the crushing requirements of materials with different sizes, and the application range of the device is widened.

The invention relates to the technical field of polyester material production, and discloses a polymerization method and system for producing chinlon 6 slices, and the provided chinlon 6 slices have the advantages of higher relative viscosity, narrower molecular weight distribution, lower water content, and higher yield. According to the system used by the invention, a ZnO / Al2O3 composite variable active catalyst adding window is directly arranged at the bottom of the melting and mixing unit 1, so that the ZnO / Al2O3 composite variable active catalyst can be ensured to be more uniformly dispersed in the whole reaction system, the reaction conditions are optimized, the variable active catalyst is adopted, the pH is dynamically regulated and controlled, and the reaction efficiency is improved. The exposure degree of active sites of the catalyst can be accurately adjusted according to the requirements of different stages of a polymerization reaction, generation of cyclic dimers in the caprolactam hydrolysis ring-opening process is effectively inhibited in the pre-polymerization stage, the content of cyclic by-products is remarkably reduced to 3.5% or below, the monomer utilization rate is increased, increase of the molecular weight is promoted in the post-polymerization stage, and the yield of the catalyst is increased. And product quality.

This application relates to the field of cable materials, specifically disclosing a low-smoke, low-halogen polyvinyl chloride (PVC) cable material and its preparation method. The material includes the following raw materials: polyvinyl chloride resin, EVM500 rubber, heat stabilizer, antioxidant, plasticizer, lubricant, filler, flame retardant, flame retardant synergist, and acrylate processing aids. The flame retardant includes a mixture of aluminum hydroxide and magnesium hydroxide, and the flame retardant synergist includes a zinc borate and ammonium octamolate-sepiolite composite. The preparation method includes the following steps: mixing the raw materials according to a specified ratio, then melting and mixing them, followed by granulation and extrusion molding to obtain the low-smoke, low-halogen PVC cable material. This application alleviates the problem of traditional PVC cable materials producing large amounts of black smoke and toxic gases during combustion, reduces smoke density, and improves the material's environmental performance and flame retardant properties.

A method for determining manufacturing conditions of a polyarylene sulfide resin composition uses a dataset to execute a machine learning algorithm, thereby determining, in a case where a characteristic value of a characteristic improvement target item of the polyarylene sulfide resin composition is used as a target variable, an item in which a degree of importance of a change in the characteristic value for the characteristic improvement target item among a plurality of items contained in manufacturing condition data and physical property measurement data is high, the dataset including the manufacturing condition data and the physical property measurement data, the manufacturing condition data including at least a compounding component of the polyarylene sulfide resin composition, a mixing condition, and a temperature of a compound during melt mixing as manufacturing condition items, the physical property measurement data including at least an impact resistance of the polyarylene sulfide resin composition manufactured according to the manufacturing condition shown by the manufacturing condition data as a characteristic value item.

The utility model discloses a kind of melting mixing devices for plastic product processing, including mixing shaft, multiple blades are equipped with outside mixing shaft, moving device is arranged outside mixing shaft, protective device is connected with the top of mixing shaft, protective device includes control sleeve, displacement spring, clamping groove, connecting rod, displacement sleeve, connecting sleeve, displacement slot, clamping block, displacement block and card frame, displacement spring is connected with clamping block and displacement block, clamping groove is opened in the outside of connecting rod, displacement sleeve outer wall is connected with the inner wall of control sleeve by thread, displacement slot is opened in connecting sleeve, clamping block is arranged in one side of card frame, locking mechanism is installed in the outside of connecting sleeve, and locking mechanism includes rotary hole, rotating plate, sliding sleeve, movable spring, fixed block, movable block and support rod, rotary hole is opened on rotating plate, support rod is connected in one side of sliding sleeve, the utility model solves the technical defects of existing equipment in cleaning maintenance difficulty, power transmission system lacks effective protection and adjustable overload protection mechanism poor stability etc.