253 results about "Nylon 6" patented technology

The invention provides a nylon 6 nanofiber virus-removing filtering membrane and a preparation method and application thereof.The nylon 6 nanofiber virus-removing filtering membrane comprises a base material and a nylon 6 nanofiber membrane compounded to the surface of the base material, the average pore size of the virus-removing filtering membrane is 20 nm, the virus-removing filtering membrane plays a role in blocking parvoviruses, the surface of the virus-removing filtering membrane is charged, and the surface of the virus-removing filtering membrane is not prone to being damaged. Proteins with the same charges on the surface can be prevented from adhering to the surface of the fiber. In the preparation process of the virus-removing filtering membrane, the nylon 6 nanofibers with a certain diameter range are selected and compounded on the surface of the base material in a stable dispersion state, the uniform microporous virus-removing filtering membrane is prepared, the effect that parvoviruses are blocked and protein molecules are not easily intercepted is achieved, the hydrophilicity of the nylon 6 nanofibers is relatively good, and the virus-removing filtering membrane has a good application prospect. The non-specific adsorption of the filtering membrane on the protein is reduced; the nylon 6 nanofiber virus-removing filtering membrane can be applied to the field of biological medicine products, and has important significance on separation and purification of biological preparations.

The invention relates to the technical field of engineering plastic detection, and particularly discloses an aging detection and evaluation method and system suitable for nylon 6 in a marine environment, the system comprises nylon 6 as a core layer, an aging response color-changing material as a surface layer and a middle layer located between the core layer and the surface layer; the thickness of the middle layer is 200-250 [mu] m, and the composite conductive film is transferred to the position 0.2 mm below the surface of the nylon 6 component in a hot pressing mode; the thickness of the surface layer is 0-200 microns and is realized by spraying an aging response color-changing material solution. By integrating the specially designed aging response color-changing material and the conductive film into the nylon 6 matrix, real-time, visual and efficient detection of the aging process is realized. According to the method, the problem that equipment such as a traditional optical fiber spectrometer is complex and expensive is solved, the convenience of field detection is greatly improved through double signal output of color gradient indication and simple electronic reading, and a brand new technical solution is provided for life prediction and preventive maintenance of nylon 6 components in ocean engineering.

The invention relates to the technical field of vacuum bag films for aeronautical manufacturing, and discloses an eleven-layer co-extruded film for aeronautical use and a preparation process thereof, and the preparation process specifically comprises the following steps: carrying out grafting modification treatment on polyamide acid by using a monoalkenyl diepoxy composite flexible compound through a carboxyl-epoxy ring-opening reaction to prepare alkenyl functionalized processable polyimide; the preparation method comprises the following steps: carrying out modification treatment on nylon 6 resin by using 3-mercaptopropionic acid through an amino-carboxyl condensation reaction to prepare mercapto functionalized nylon; under the hot melting condition, alkenyl functionalized processable polyimide and sulfydryl functionalized nylon are induced to be subjected to reactive compounding through a free radical initiator, PA-PI alloy master batch is prepared, the master batch serves as a functional modification component of copolymerized polyamide 6 / 66 resin, an eleven-layer co-extrusion film is prepared through an eleven-layer co-extrusion blow molding process, and the eleven-layer co-extrusion film is used as a functional modification component of the copolymerized polyamide 6 / 66 resin. The film product has excellent comprehensive performance and can be used as a high-temperature-resistant vacuum bag film for curing aviation composite materials.

The invention provides a nylon modified material as well as a preparation method and application thereof, and relates to the technical field of nylon compositing, the nylon modified material comprises the following components: nylon 66, low-viscosity nylon 6, a toughening agent, a compatilizer and a flow crystallization accelerant; wherein the toughening agent comprises a block copolymer containing a polyethylene glycol chain segment and a polydimethylsiloxane chain segment; the compatilizer comprises a compound containing a diglycidyl ether group. According to the nylon modified material provided by the invention, under the condition that the modulus of nylon 66 is slightly reduced, the impact strength is improved, so that the nylon modified material has the characteristics of high flowability, high toughness, self-lubrication and the like, and can meet the requirements of occasions such as automobile parts and industrial production.

The invention discloses a preparation method of reactive antioxidant grafted modified nylon 6 and a film thereof, and belongs to the technical field of nylon modification. A reactive antioxidant containing a hindered phenol structure and nylon 6 are subjected to melt chemical grafting to form a covalent bond combined nylon 6-antioxidant system, and hindered phenol provides hydrogen atoms and can be combined with free radicals generated in the aging process, so that the chain reaction of the hindered phenol is terminated, and phenoxy free radicals with low activity are formed by the hindered phenol. According to the invention, the reactive antioxidant grafted modified nylon 6 is further processed into a film product, and the nylon 6 film product prepared by the method has the advantages of less antioxidant migration, aging resistance, high mechanical property retention rate and the like.

The invention provides a high-performance polyamide flame-retardant composite material based on element synergistic effect and a preparation method thereof, and belongs to the technical field of polyamide flame-retardant materials. The preparation method comprises the following steps: preparing a phosphorus-nitrogen flame retardant, preparing a surface-modified rare earth-silicon-based material, preparing a mixture, extruding and granulating. The step of preparing the mixture comprises the following steps: uniformly mixing brominated polystyrene (BPS), a phosphorus-nitrogen flame retardant, a rare earth-silicon-based material, glass fibers, an antioxidant 1098, a heat stabilizer diisooctyl phenyl phosphite, nylon 66 and nylon 6 to obtain the mixture; according to the invention, the use of antimony oxide in the traditional bromine-antimony flame-retardant system preparation process is abandoned, and the preparation process is simple, good in repeatability, green, environment-friendly and efficient.

The invention discloses a double-layer composite structure cable sheath and a preparation method thereof, and belongs to the technical field of cable sheath materials. The invention relates to a preparation method of a cable sheath with a double-layer composite structure. The preparation method comprises the following steps: uniformly mixing polyvinyl chloride, an organic ester compatilizer and a metal salt stabilizer to obtain a PVC mixture; caprolactam is subjected to ring opening treatment and then subjected to copolymerization with adipic acid and polyether amine, and modified nylon 6 is obtained; uniformly mixing the modified nylon 6, an aliphatic diester lubricant and an amine stabilizer to obtain a nylon mixture; the cable core passes through a co-extrusion die head, the PVC mixture and the nylon mixture wrap the cable core from inside to outside in a melt co-extrusion mode, and after shaping, the cable sheath of the double-layer composite structure is obtained. The problems of layering, bubbles, poor interface bonding force and the like in combined processing of the nylon layer and the PVC layer are solved. And the obtained cable sheath has high toughness, bending resistance and fluidity.

The invention provides a composite intumescent flame retardant modified polyamide composite material and a preparation method thereof. The flame-retardant nylon 66 and / or nylon 6 composite material is prepared from the following components in parts by weight: 75-85 parts of nylon 66 and / or nylon 6 matrix and 15-25 parts of composite intumescent flame retardant, wherein the composite intumescent flame retardant is prepared from the following components in parts by weight: 30-50 parts of a phytic acid derivative; 20 to 40 parts of melamine pyrophosphate (MPP); 5 to 15 parts of modified nanosheets; and 10-20 parts of a hydrogen bond cross-linking agent. According to the composite intumescent flame retardant modified polyamide composite material disclosed by the invention, the limit oxygen index and the fireproof grade can be remarkably improved under the condition that the addition amount of the composite intumescent flame retardant is low, and the mechanical property of the polyamide material is not influenced.

The present invention provides a method for recovering ε-caprolactam and polyether polyurethane from a material comprising nylon 6 and polyether polyurethane in a plant, wherein the plant comprises a separation section [B], a depolymerization section [C], a recovery section [D], and a purification section [E].

The invention provides a high-performance flame-retardant nylon composite material and a preparation method thereof, and belongs to the technical field of flame-retardant nylon composite materials. The high-performance flame-retardant composite material comprises the following raw material components: glass fibers, antimony trioxide, brominated polystyrene, an acid-binding agent, nylon 6, a composite antioxidant, a heat stabilizer and a lubricant. The high-performance flame-retardant nylon composite material disclosed by the invention has excellent mechanical property, flame retardance and whiteness.

The application relates to the technical field of textile materials, and provides hyaluronic acid microcapsules, hyaluronic acid-polyamide 6 master batches, hyaluronic acid-polyamide 6 filaments and preparation methods. The hyaluronic acid microcapsules are prepared by taking gum arabic and gelatin as wall materials, the hyaluronic acid-polyamide 6 master batches are prepared by using the hyaluronic acid microcapsules, and then the hyaluronic acid-polyamide 6 filaments are prepared by using the hyaluronic acid-polyamide 6 master batches. The hyaluronic acid microcapsules provided by the application can be uniformly dispersed in polyamide 6 fibers, and the spinnability and mechanical properties of the fibers are not affected, and the mechanical properties of the obtained filaments are excellent. The results of examples show that the breaking strength of the hyaluronic acid-polyamide 6 DTY filaments prepared by the application is 3.89-4.02 cN / dtex, and the breaking elongation is 26.31-28.02%.

The utility model provides a solid-liquid mixed material conveying system which comprises a material storage tank, a discharging control unit, a power conveying unit and a gas-liquid separation tank and is used for realizing gas-liquid separation and water distribution, and a dehydration unit conveys separated water to the gas-liquid separation tank; the pressure monitoring and control unit is used for controlling the outlet pressure of the slurry pump; the water storage tank is used for receiving the return water from the gas-liquid separation tank, storing water and supplementing water for the conveying process of the solid-liquid mixture; the water inlet pipe is used for conveying desalted water to the water storage tank. The discharging control unit stably controls the water level of the material storage tank. And parts associated with the centrifugal dehydrator, the gas-liquid separation tank, the water storage tank and the like perform own functions, so that water resource recycling, gas-phase pressure balance and liquid level stability are realized. By means of the whole system, stable, efficient and energy-saving conveying of nylon 6 slices from the low position to the high position can be achieved, a foundation is built for efficient and stable polymerization production of nylon 6, and the industrial application value is high.

The present application relates to the technical field of new energy power battery thermal management materials, in particular to a co-extrusion film material for aerogel thermal insulation pad packaging, and discloses a co-extrusion film, a preparation process and application in new energy batteries, wherein the co-extrusion film is prepared from high-performance master batches through a co-extrusion blow molding process, the high-performance master batches are composed of seven-vinyl POSS single-grafted nylon 6 resin, modified expanded vermiculite with octadecenyl and DOPO groups on the surface, and dicumyl peroxide initiator, under the action of the dicumyl peroxide initiator, the vinyl on the POSS cage structure of the seven-vinyl POSS single-grafted nylon 6 resin and the octadecenyl on the surface of the modified expanded vermiculite occur free radical reaction to obtain the high-performance master batches. Through the synergistic modification strategy of double grafting and crosslinking, the present application realizes the synergistic improvement of flame retardation, heat resistance, barrier property and mechanical property, and solves the technical bottlenecks of aerogel packaging materials in high-temperature failure, weak interface bonding and processing performance deterioration.

The invention relates to the technical field of high-performance polyester, and discloses a moisture-absorbing and sweat-releasing braid, a preparation method thereof and application of the moisture-absorbing and sweat-releasing braid in underwear shoulder straps. The preparation method of the moisture-absorbing and sweat-releasing braid comprises the following steps: combining a guanidyl polymer with a modified quaternary ammonium salt compound to obtain a bi-component organic antibacterial agent; grafting a bi-component organic antibacterial agent to the modified composite inorganic antibacterial material to obtain an antibacterial modifier; mixing the polyester master batch and the antibacterial modifier, and carrying out melt spinning to obtain the modified profiled polyester fiber; the modified profiled polyester fibers are spun into modified polyester yarns, the nylon 6 fibers are spun into nylon yarns, and then the moisture absorption and sweat releasing braid is woven. The moisture absorption and sweat releasing braid made of the modified polyester fibers and the nylon fibers not only has the advantages of being good in mechanical property, high in elasticity, resistant to wear and skin-friendly, but also has excellent moisture absorption and sweat releasing performance and lasting antibacterial performance, and when the braid is used in underwear shoulder straps, comfortable, healthy and safe wearing experience can be provided for wearers.

The application discloses a kind of superdispersion flame-retardant engineering plastic master batch and preparation method thereof, it is related to functional plastic technical field, including functional master batch, the functional master batch includes the following components by weight parts: nylon 6 sheet 100 parts, modified carbon nanotube 0.5-8 parts, diethyl phosphinic acid ethyl aluminum 5-15 parts, flame retardant 5-15 parts, carbon forming agent 2-5 parts, epoxy silicon dioxide 0.5-5 parts, compatible agent 0.5-5 parts.The application introduces diethyl phosphinic acid ethyl aluminum and flame retardant, forms carbon layer on the material surface when plastic master batch burns, and the interaction between the molecular chains of plastic master batch is improved by Schiff base structure, realizes the double performance improvement of plastic master batch flame retardant and anti-dripping, solves the problem of fire spread caused by melt dripping.

The invention discloses a preparation method of a high-conductivity modified carbon fiber reinforced nylon material, and the preparation material comprises the following components: 69-79.5% of nylon 6, 0.5-1.5% of modified carbon fiber and 0.5-1.5% of other assistants. 20 to 30% of modified carbon fiber; and 0.5-1% of other auxiliary agents. The preparation method comprises the following steps: modifying a ferrocene material which is mostly used for a catalyst, accurately controlling a reaction sequence, carrying out amination treatment on carbon fibers, directionally grafting an asymmetric ferrocene derivative of which one end is carboxyl and the other end is an amino group protected by a photosensitive protective agent, and releasing an amino group protected by the photosensitive protective group through ultraviolet rays during processing, according to the present invention, the damage to the group during the traditional chemical deprotection is avoided, the exposed amino group reacts with the carboxyl group of the nylon 6 chain segment to form the firm covalent bond interface so as to substantially improve the interface bonding capacity, and the existence of the ferrocene derivative provides the conductive path on the interface so as to substantially increase the conductivity, the technical problem that the carbon fiber and nylon matrix interface bonding is weak and the conductivity is difficult to consider is solved.

The invention discloses a chinlon 6 filament based on high carboxyl modification and a preparation method thereof, and belongs to the technical field of chinlon production. The polyamide 6 filament based on high carboxyl modification is prepared by adopting PA6 slices with low-end amino groups and high-end carboxyl groups as raw materials, the ordered combining capacity of fibers and anionic dye is enhanced by reducing the content of the end amino groups and increasing the proportion of the end carboxyl groups, the dye is prevented from being accumulated on the surface, the dyeing uniformity and the dyeing permeability of the polyamide 6 filament are improved, and the dyeing quality of the polyamide 6 filament is improved. Meanwhile, the production parameter combination is precisely regulated and controlled, so that more microporous structures are reserved to adsorb the dye while the high viscosity of the high-carboxyl section is solved in the production process, and dye molecules are more easily diffused into the fiber; the prepared chinlon 6 filament based on high carboxyl modification realizes high-saturation and high-uniformity dyeing under low dye concentration, has ideal dye-uptake and fixation rate, and also has excellent dyeing effect on light-color sensitive colors, not only reduces the washing times after the chinlon filament is dyed, but also does not fade after being washed for multiple times.

The invention belongs to the field of air filtering materials, and provides a non-gel activated carbon air filtering non-woven fabric. The design that the activated carbon particles are coated with polydopamine in situ and covalently connected with the nylon 6 fibers through Schiff base bonds and Michael addition bonds is adopted, and firm loading of the activated carbon particles in the non-woven fabric can be achieved without adding an independent binder; the problem that the adsorption efficiency is reduced due to the fact that a traditional binder blocks activated carbon micropores is solved. The thickness of the polydopamine coating layer is controllable, the loading capacity of the activated carbon can reach 5-40 wt%, low filtering resistance and high adsorption efficiency are still kept under the high-loading condition, the spunlace reinforcing technology ensures the particle distribution uniformity and batch stability, the tensile strength is not lower than 5 N / 5 cm, and the air purification application value is wide.

The invention discloses a method for preparing a PA6 / 56 bio-based copolyamide fiber through melt direct spinning, which comprises the following steps: mixing raw materials containing a caprolactam solution, a PA56 salt solution and a molecular weight regulator, preheating, carrying out prepolymerization reaction and polycondensation reaction to obtain a PA6 / 56 copolymer melt, and carrying out devolatilization to obtain a PA6 / 56 devolatilization melt; and carrying out melt spinning on the PA6 / 56 devolatilization melt to obtain the PA6 / 56 bio-based copolyamide fiber. According to the invention, bio-based 1, 5-pentamethylene diamine is adopted as a raw material of PA56, preheating and pre-polycondensation are firstly carried out after configuration, then polycondensation is carried out to further increase the number-average molecular weight of a nylon 6 prepolymer, and the obtained copolymer melt is in a molten state. Low polymers of the copolymer are removed through the devolatilization reactor, liquid phase extraction of PA6 / 56 is achieved, the extractable matter content of the obtained copolymer melt is smaller than or equal to 2 wt%, the technological process is simplified, and the production cycle, the equipment investment cost and the production energy consumption are greatly reduced.

The application is a kind of low water absorption and high heat distortion temperature copolymer nylon resin, which comprises the following components in weight percentage: 98% to 99.8% of nylon salt; 0.1% to 1% of end-capping agent; and 0.1% to 1% of hindered phenol monomer. The nylon salt comprises 60% to 80% of nylon 66 salt and 20% to 40% of nylon 6T salt. The end-capping agent is glycidyl ether containing silane and / or siloxane structure. The hindered phenol monomer comprises one or more of N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexanediamine, 4,4'-butylidenebis(6-tert-butyl-3-methylphenol), and tris(2-methyl-4-hydroxy-5-tert-butylphenyl)butane. The product of the application can meet the production requirements of differentiated copolymer nylon and has universal applicability. Without adding filling materials such as fiber, kaolin, talc, etc., the water absorption can be significantly reduced, the melting point and heat distortion temperature can be increased, and the inherent properties of nylon 66 resin are not affected.

The application discloses a kind of photoresponsive self-repair antibacterial nylon materials and preparation method thereof.The material is modified nylon 6 polymer, aromatic Schiff base dynamic imine bond generated by condensation reaction of carboxyl benzaldehyde and p-phenylenediamine is embedded in its molecular main chain, which gives the material the ability of light-triggered self-repair without external heat source, and unexpectedly improves the mechanical properties and thermal stability of the material, the molecular chain end is bonded with antibacterial organic acid through amide bond, and the antibacterial organic acid is 2-methyl-4-(trifluoromethyl) thiazole-5-carboxylic acid.The preparation method adopts one-pot two-stage polymerization, after pressure opening ring prepolymerization, pressure relief vacuum is carried out to carry out deep condensation and end-capping, and the product is obtained by extrusion granulation and drying.The material can realize room temperature self-repair under natural light, and the antibacterial component is non-dissolution fixed.The application process is simple, the performance is adjustable, and can be used in the field of intelligent packaging, repairable antibacterial coating and biomedical materials.

The invention provides spinning-grade flame-retardant antistatic anti-aging copolymerized nylon 6 and a preparation method thereof, and belongs to the technical field of copolymerized nylon and preparation thereof. The spinning-grade flame-retardant antistatic anti-aging copolymer nylon 6 is prepared from the following components in parts by weight: 1000 parts of caprolactam, 40 to 80 parts of flame retardant salt, 2 to 30 parts of m-rGO, 1 to 10 parts of chain extender, 1 to 5 parts of phosphorus-containing catalyst and 1 to 5 parts of anti-aging agent, the flame-retardant antistatic nylon 6 is prepared by a pretreatment and copolymerization method, so that the flame retardance, antistatic property and aging resistance of the nylon 6 are improved, and meanwhile, the problems that a flame retardant is migrated and separated out, and processing or spinning is difficult after the flame retardant and an antistatic agent are added are solved.

The application discloses a composite nylon material preparation method, which is prepared by blending modified polytrifluoropropyl methyl siloxane containing hydrophobic trifluoropropyl side chains with nylon 6, realizing nanoscale dispersion in a melt extrusion process, adding an epoxy functionalized silane coupling agent and an organic tin catalyst, forming a three-dimensional crosslinked network under the hydrophobic effect of the trifluoropropyl side chains and the water blocking effect of the three-dimensional crosslinked network in the extrusion process, effectively blocking the diffusion channel of water molecules, improving the moisture resistance of the material, maintaining the tensile property of the raw material at 92-95%, and enhancing the wear resistance and thermal stability of the material by modified nanosilica; the equilibrium water absorption rate is only 0.7-0.9%, the low-temperature resistance is improved by more than 25%, and the low-temperature resistance is far superior to the embrittlement temperature of traditional PA6, so that the nylon material modification method has the advantages of maintaining mechanical properties, water resistance and low-temperature brittleness.

The present invention relates to a preparation method of physically regenerated nylon 6, which is characterized by comprising the following steps: (1) classifying and recycling waste silk and waste blocks in the production process according to glossiness and whether they contain spinning oil, and then cutting the waste silk into short fibers of 5-10 cm, and crushing the waste blocks into short fibers of 5-8 mm. 2 (2) extracting the cut or crushed waste silk and waste blocks with 100°C desalted boiling water for 8-10 hours to fully remove the monomers, oligomers and oils in the waste silk or waste blocks; (3) drying the waste silk and waste particles after extraction, and drying the moisture in the material to below 400ppm; the present invention omits the intermediate re-granulation step through the above process steps, making the entire production cost lower and the operation simpler, and performing two monomer removal steps, so that the spinning stability is high and the product quality is comparable to that of conventional chip spinning.

The invention discloses a method for efficiently preparing a nylon 6 micro-nano fiber antibacterial air filtering membrane material, which comprises the following steps: etching porous ceramic microspheres, mixing with a non-polar material solution, coating, drying, and injecting charges to obtain electret microspheres; mixing an antibacterial substance solution with the electret microspheres in the step S1, and drying to obtain antibacterial-electret microspheres; meanwhile, spinning a bottom layer of the filtering membrane by using a crude fiber spinning solution and a fine fiber spinning solution through blowing spinning; adding a crude fiber spinning solution and antibacterial-electret microspheres into a cross-linking agent for mixing and spraying to form a middle layer with the surface of the bottom layer; repeating bottom layer operation and spraying again to form a top layer with the middle layer to obtain the filtering membrane with a multi-layer structure; carrying out hot press molding on the filtering membrane with the multi-layer structure; the dynamic interaction between a flow field and particles is enhanced, so that fine particles are more easily adsorbed or intercepted by the fiber surface, and efficient filtration is realized.

This invention relates to the field of polymer materials technology, and discloses a low-temperature resistant and high-impact protective face shield material and its preparation method. The protective face shield material of this invention comprises the following raw materials in parts by weight: 55-70 parts of nylon 66, 5-15 parts of nylon 6, 5-12 parts of a low-temperature toughening agent, 4-10 parts of a high-temperature resistant additive, 0.5-1 part of oleamide, 0.2-0.5 parts of silane coupling agent 550, 0.2-0.5 parts of an antioxidant, and 0.5-1.5 parts of an ultraviolet absorber. The low-temperature toughening agent of this invention can improve the impact resistance of nylon materials in low-temperature environments, maintaining excellent impact strength even at low temperatures. The high-temperature resistant additive gives the nylon material excellent high-temperature thermal stability, avoiding problems such as softening deformation, yellowing cracking, and mechanical property degradation at high temperatures.

The present invention relates to a process for recovering epsilon-caprolactam from a nylon 6-containing multi-component material. The present invention provides an improved process for the recovery of epsilon-caprolactam from nylon 6-containing multi-component materials, in particular multilayer films. Furthermore, the invention provides: a plant configured to carry out the method of the invention; and the recovered [epsilon]-caprolactam obtainable by the process of the invention having a product carbon footprint of less than 2.5 kg CO2 equivalents per kg of purified [epsilon]-caprolactam.

The invention provides a PA6-doped polypropylene-based semiconductive shielding material for a cable, a preparation method of the PA6-doped polypropylene-based semiconductive shielding material and the cable containing the PA6-doped polypropylene-based semiconductive shielding material The PA6-doped polypropylene-based semiconductive shielding material for the cable comprises a resin matrix, a conductive filler and an antioxidant, and the resin matrix comprises polypropylene, PA6 and an elastomer; the content of the PA6 is 0.5-10 wt% of the total mass of the resin matrix. According to the polypropylene-based semiconductive shielding material provided by the invention, the electrical resistivity of the material at 20 DEG C and 90 DEG C is reduced by adding nylon 6 (PA6), the PTC effect is effectively inhibited, meanwhile, the material still keeps good mechanical properties, and the balance of conductive stability and mechanical properties is realized.

This application relates to the field of nylon 6 polymerization process technology, and provides a separation system for oligomers in nylon extract, including: a feed main pipe, crystallization devices, a temperature control system, a solid-liquid separation device, a fluidized bed, and an oligomer storage tank. At least two crystallization devices are provided, each connected in parallel and connected to the feed main pipe. The discharge end of each crystallization device is connected to the solid-liquid separation device. The temperature control system is connected to each crystallization device and regulates its temperature. The solid discharge port of the solid-liquid separation device is connected to the fluidized bed, and the fluidized bed is connected to the oligomer storage tank. Through the parallel arrangement of the crystallization devices, each crystallization device operates independently, providing time for cooling and crystallization to achieve continuous production.

The application discloses a kind of ultra-high temperature degradable plugging materials and preparation method thereof, by the specified amount of degradable resin, polyamide, polyester elastomer, inorganic filler, plasticizer are mixed, get premix, again, the premix is shaped to obtain plugging material.The application adopts nylon 6 and the degradable resin mainly with polyglycolic acid is blended, while adding degradable polyester polyurethane increases the compatibility of nylon 6 and resin, obtains the degradable plugging material of above 200 DEG C ultra-high temperature resistance and moderate degradation rate;It can be applied to the fracturing temporary plugging construction of above 200 DEG C reservoir, self-degradation at reservoir temperature, complete degradation time 48-120h adjustable, with ultra-high temperature resistance, self-degradation, degradation rate adjustable control characteristics, suitable for ultra-high temperature formation reservoir reconstruction operation, increase fracturing construction success rate.