130 results about "Heat deflection temperature" patented technology

The invention relates to the technical field of polymer optical materials, in particular to an optical-grade polymethyl methacrylate material and a preparation method thereof, and the optical-grade polymethyl methacrylate material comprises the following raw materials in parts by weight: 95-105 parts of methyl methacrylate, 200-240 parts of a composite liquid medium, 1.5-2.5 parts of a composite additive and 0.08-0.12 part of an initiator. According to the invention, the composite additive is used as a main material and the composite liquid medium is used as an auxiliary material, so that the heat resistance and the size stability of the material are synergistically improved, powder in the composite additive is uniformly dispersed in a methyl methacrylate matrix to form a compact physical support skeleton, and the powder is matched with a treating agent and a methyl methacrylate molecular chain to form strong chemical bond combination; the composite liquid medium optimizes the flowability of a polymerization system, reduces polymerization internal stress residues, avoids material deformation caused by internal stress release at high temperature, and enhances high-temperature stability.

The application discloses a large-current aluminum alloy conductor polypropylene insulated medium-voltage power cable and belongs to the technical field of cable preparation, which is used to solve the technical problem that the shielding performance and heat dissipation performance of the polypropylene insulated power cable in the prior art need to be further improved. The polypropylene insulated power cable prepared by the application introduces modified core-shell carbon-nitrogen bodies and silicon-oxygen-nitrogen polypropylene into a polypropylene insulation layer, and a nucleating agent is used to regulate the crystalline structure. The modified core-shell carbon-nitrogen bodies improve the interface heat conduction and charge distribution, the silicon-oxygen-nitrogen polypropylene enhances the chain segment stability and crystalline compactness, and the nucleating agent makes the matrix form a uniform microstructure. Through the structure design, the cable insulation layer maintains a high level in terms of heat distortion temperature, thermal conductivity and volume resistivity, and at the same time, good electromagnetic shielding efficiency is realized, and the heat resistance, thermal conductivity and insulation performance are comprehensively improved.

The invention provides a polylactic acid composite material and a preparation method thereof, and the preparation method comprises the following steps: levorotatory polylactic acid, dextrorotatory polylactic acid and a compatibilizer are subjected to a reaction to obtain a stereocomplex microcrystal, and the stereocomplex microcrystal and a dynamic cross-linked polyurethane prepolymer are subjected to a blending reaction to obtain the polylactic acid composite material. According to the invention, the toughness and the heat resistance of the polylactic acid composite material are improved by utilizing the dynamic cross-linked polyurethane to cooperate with the stereocomplex microcrystals, and the highest elongation at break can reach 302 + / -15% while the unnotched impact strength of the material is maintained to be greater than or equal to 48 MPa; and the maximum thermal deformation temperature can reach 98.6 DEG C.

The present application discloses a kind of polyethylene terephthalate mixture and its preparation method and application, the polyethylene terephthalate mixture includes the following components: polyethylene terephthalate resin 45-86 parts by weight, toughening agent 0-10 parts by weight, reinforcing agent 10-50 parts by weight, nucleating agent 0.7-10 parts by weight, processing aid 0-3 parts by weight.The nucleating agent includes the combination of long-chain linear saturated lignosulfonate, talcum powder and polyethylene.The forming property of the polyethylene terephthalate mixture of the present application is further improved, the forming cycle is greatly shortened, the mechanical strength, toughness and heat distortion temperature can be maintained relatively high, the application range is further expanded, not limited by color, and can be applied to full-color products.

The utility model discloses a connector, which comprises a connector body, an internal protection part, a middle protection layer and an external protection layer, and is characterized in that the connector body comprises a connector rubber core and a circuit board arranged on the connector rubber core; the internal protection part is encapsulated on the circuit board; the middle protection layer is encapsulated at one end, close to the circuit board, of the internal protection part and the connector rubber core; the external protection layer is encapsulated at one end, close to the circuit board, of the middle protection layer and the connector rubber core; the material thermal deformation temperature of the internal protection part is smaller than that of the middle protection layer, and the material thermal deformation temperature of the middle protection layer is smaller than that of the external protection layer.

The invention provides an integrated inductor formed based on a magnetic composite material and a winding and a manufacturing method of the integrated inductor. The integrated inductor comprises a main magnetic ring, iron-based nanocrystalline powder and composite powder which are formed in an axial magnetic field orientation mode under the pressure of 500-700 MPa, the winding and an internal gradient layer. The crushed magnetic particle mixture is of a chain structure of Fe-Si-B-Cr amorphous crushed magnetic particles which are directionally arranged in a magnetic field, and the external coating layer is made of a high-thermal-conductivity magnetic composite material. According to the invention, a three-stage magnetic circuit design is formed by the high saturation magnetic induction intensity of the main magnetic ring, the structural support, the magnetic resistance shunt of the transition layer, the stress buffer and the broadband response and thermal management of the coating layer, so that the broadband response of DC-5MHz is realized, and the saturation current is improved; meanwhile, an epoxy resin-cyanate ester-polysulfide rubber composite matrix is subjected to triazine ring crosslinking and elastomer modification, so that the thermal deformation temperature reaches 200 DEG C or above, meanwhile, the interlayer CTE difference is reduced, and the forming yield is increased.

The application discloses a polyolefin resin composition and a preparation method and application thereof, and the polyolefin resin composition comprises the following components in parts by weight: linear PE resin 60-92 parts; HDPE 2-10 parts; and cyclic polyolefin resin 6-30 parts; the content of bicycloheptene in the cyclic polyolefin resin is greater than or equal to 75%, and the heat distortion temperature is greater than or equal to 127 DEG C. The polyolefin resin composition has good extinction effect and is suitable for packaging materials with high extinction effect requirements.

The invention relates to the technical field of polymer thermoelectric composite materials, in particular to a heat tracing band, which comprises an outer insulating layer, a shielding layer, an inner insulating layer and a conductive core band, and is characterized in that the conductive core band comprises two conductive buses arranged in parallel and a PTC (Positive Temperature Coefficient) composite material coating the conductive buses; the PTC composite material comprises the following components in parts by weight: 180-220 parts of carbon black-carbon fiber composite conductive powder, 600-700 parts of linear low density polyethylene, 50-100 parts of an ethylene-octylene copolymer, 2-4 parts of an antioxidant and 1-3 parts of an ultraviolet light absorber. According to the invention, the ethylene-octene copolymer long-chain branch and the linear low-density polyethylene chain segment are entangled to form a special molecular network; at low temperature, linear low-density polyethylene ensures that the structure is stable, and an ethylene-octylene copolymer flexible chain segment absorbs impact and relieves low-temperature brittleness; at high temperature, the molecular chain of the former is anchored by the long-chain branch of the latter, the sliding of the chain segment is blocked, and a proper amount of balance toughening and heat-resisting agent is added, so that the heat deformation temperature is increased, and the material softening is delayed.

The application discloses a photosensitive resin composition and a preparation method thereof, and particularly relates to the technical field of electronic chemicals. In view of the fact that traditional photosensitive resin is difficult to balance the bending performance and heat resistance, the composition is composed of photosensitive resin, photoinitiator, filler, flame retardant and additive. The core lies in that rigid-flexible synergistic design is performed on polyimide and polyurethane acrylate, and the interface adhesion is enhanced in combination with epoxy resin. In the preparation, a process flow of high-temperature dissolution, medium-temperature mixing, fineness control and segmented curing is adopted. The test shows that the adhesion of the prepared resin composition reaches 5B level, the flame retardant level is V-0, the heat distortion temperature is as high as 185 DEG C, and the bending resistance times are more than 10,000 times. The application realizes synchronous improvement of mechanical flexibility and heat stability without sacrificing photosensitivity, has obvious progressiveness, and is particularly suitable for the fields of flexible electronics and high-end packaging.

The embodiment of the invention discloses a high-temperature-resistant nylon composite material and a preparation method thereof. The material comprises semi-aromatic nylon, a toughening agent and copper salt, the flexibilizer comprises a maleic anhydride grafted flexibilizer, and the copper salt comprises copper salt particles with smooth surfaces. Melting and dispersing the toughening agent at 200-220 DEG C; and mixing the molten toughening agent, the semi-aromatic nylon and the copper salt at the temperature of 270-310 DEG C. According to the embodiment of the invention, the specific flexibilizer is selected, so that the tensile strength is ensured on the premise of ensuring the impact strength and the tensile fracture strain, and meanwhile, the influence on the thermal deformation temperature is reduced to the minimum; meanwhile, copper salt particles with smooth surfaces are screened, so that copper salt agglomeration is effectively reduced, adverse effects of the copper salt on fibers are avoided, toughening and thermal stability are achieved, and the high-temperature nylon composite material is high in toughness, good in processing fluidity, high in thermal deformation temperature and excellent in long-acting thermal stability.

The application designs and synthesizes a nucleating agent with good compatibility with recycled polyethylene terephthalate. The nucleating agent can effectively solve the technical problems of slow crystallization rate and poor heat resistance of recycled polyethylene terephthalate. The nucleating agent is simple to synthesize, has good effect, can effectively improve the crystallization temperature, crystallization rate and heat distortion temperature of recycled polyethylene terephthalate, and further promotes the wide application of recycled polyethylene terephthalate.

This invention relates to the field of polymer molding technology, specifically to a high-temperature resistant, dimensionally stable acrylic sheet and its preparation and shaping process, comprising the following components: 80-95 parts by weight of polymethyl methacrylate matrix resin, 5-20 parts by weight of isoborneol methacrylate, 2-6 parts by weight of nano-silica, 0.4-1.2 parts by weight of silane coupling agent, 0.2-0.6 parts by weight of initiator, 0.5-1.5 parts by weight of crosslinking agent, 0.1-0.4 parts by weight of antioxidant, 0.1-0.3 parts by weight of light stabilizer, and 0.05-0.2 parts by weight of release agent. By introducing isoborneol methacrylate as a comonomer into the polymethyl methacrylate matrix, the glass transition temperature of the polymer is significantly increased by utilizing the cyclic rigid groups in its molecular structure. Combined with the reinforcing effect of nano-silica, the high-temperature resistance of the acrylic sheet is significantly improved, with a heat distortion temperature and Vicat softening temperature significantly higher than those of ordinary acrylic sheets.

The present invention relates to a single-layer or multi-layer extruded, biaxially stretched, and heat-set film. The film comprises a first polypropylene (PP1) and has a thermal deflection temperature greater than 75°C. The film can be used, for example, as a packaging material, particularly for food packaging. The present invention also relates to a method for producing the film and the use of the film, preferably for packaging food.

The invention relates to the technical field of high polymer materials, and discloses a polymethyl methacrylate composition and a preparation method thereof, and the polymethyl methacrylate composition is prepared from the following raw materials in parts by weight: 100 parts of polymethyl methacrylate resin, 0.2-3.2 parts of a Lewis acid center provider, 0.2-3.2 parts of a multifunctional bridging ligand, and 0.1-1.1 parts of a competitive replacement aid. The preparation method comprises the step of carrying out melt blending on the components. According to the invention, through the synergistic effect of the Lewis acid center provider and the multifunctional bridging ligand, a dynamic reversible supramolecular network is constructed in a polymethyl methacrylate matrix, and the structure of the supramolecular network effectively improves the impact toughness, rigidity and thermal deformation temperature of the material. The technical problem that toughness, rigidity, heat resistance and processability of a traditional polymethyl methacrylate material are difficult to consider at the same time is solved, and the polymethyl methacrylate composition with excellent comprehensive performance is prepared.

The invention provides a low-haze high-heat-resistance polycarbonate block copolymer. The low-haze high-heat-resistance polycarbonate block copolymer comprises a block A as shown in a formula I and a block B as shown in a formula II, the molar ratio of the block A to the block B is (50: 50)-(95: 5). The invention also provides a preparation method of the composition. A bisphenol TMC rigid group is introduced into a polycarbonate molecular structure in a block form, so that the heat resistance, the impact resistance and the optical performance of polycarbonate are synergistically improved; the polycarbonate is especially suitable for optical devices, automobile precision parts, electronic packaging materials and other high-end industrial fields with strict requirements for high-temperature stability, mechanical properties, light transmittance and transparency. Experimental results show that the glass transition temperature (Tg) of the polycarbonate block copolymer provided by the invention reaches 200-210 DEG C, the vicat softening point reaches 190-210 DEG C, the heat distortion temperature (HDT) reaches 170-180 DEG C, and the light transmittance is gt; 89%, and the haze is lt; and 0.3%.

The application discloses a kind of bio-based polyamide composite boards, it includes first surface layer, middle layer and second surface layer;The first surface layer, middle layer and second surface layer are sequentially stacked;The first surface layer and second surface layer are long carbon chain polyamide resin unidirectional prepreg tape, and the middle layer is the composite material layer of bio-based polyamide 56 silk glass fiber blended fabric and fiber cloth.The compression molding of the composite board guarantees the processing rate and efficient forming of the board, improves the mechanical properties and heat distortion temperature of the composite board, reduces the water absorption of the composite board, and the overall quality is light, more meets the demand of lightweight board.

The application provides a reinforced nylon material and a preparation method thereof, and components of the nylon material include, in terms of weight parts, nylon mixture: 50-70 parts; composite reinforcing agent: 20-35 parts; novel toughening agent: 5-12 parts; interface modifier: 1-3 parts; water absorption resistance modifier: 0.5-2 parts; and processing aid: 0.3-1.5 parts. Through the compounding use of the composite reinforcing agent (short-cut glass fiber + silicon-aluminum powder) and the novel core-shell structure toughening agent, and the action of the interface modifier, the material has excellent mechanical strength, good toughness, high heat deformation temperature, and meets the demand of the high-end field for the rigidity-toughness balance of the material, and compared with the existing reinforced nylon material, the impact strength is improved, and the tensile strength is improved.

In order to solve the problems existing in the prior art, common hot rolled steel, carbon manganese steel and low-carbon microalloyed steel are creatively subjected to Al alloying, the difference of free energy of transformation from austenite to ferrite is reduced through addition of the Al element, the free energy is about 140 mol / J, and the content of the Al element in the hot rolled steel is greatly reduced. During thermal deformation, austenite is subjected to phase transformation to induce ferrite phase transformation, so that the difficulty is reduced, and the possibility of deformation-induced ferrite phase transformation is improved. Besides, a certain content of ferrite delta ferrite is obtained within the thermal deformation temperature range (1200-800 DEG C) by adding the Al element, the ferrite delta ferrite is expected to be recrystallized during thermal deformation, fine crystal grains are obtained, and refining of the whole structure is achieved.

The invention relates to a rolled product made of an aluminum alloy having a thickness of 15 mm to 50 mm, consisting of, in% by weight, Cu: 2.3-2.7; 1.3 to 1.7 parts of Li; 0.2 to 0.5 part of Mg; 0.2 to 0.5 part of Mn; 0 to 0.1 part of Ag; zn: lt; 0.20, 0.20; 0.01 to 0.15 percent of Ti; zr < lt >; 0.07, 0.07; fe < lt >; 0.1 part; si < lt >; 0.1 part; other elements per lt; 0.05 and the sum lt; 0.15, the remainder being aluminum, in which phases having an equivalent diameter of 35 to 500 nm have an average equivalent diameter of less than or equal to 100 nm. The product according to the invention is obtained by a method wherein in particular the thermal deformation conditions are such that the final thermal deformation temperature is at least 400 DEG C, and the solution heat treatment of the product comprises a step from 540 DEG C to 580 DEG C for at least 15 minutes and less than 8 hours.

The utility model relates to a drying device and cleaning equipment, and the drying device comprises a device body which is provided with a first inlet and a first outlet which communicate with each other; the supporting assembly is arranged in the device body; the conveying assembly comprises a first driving part and a first rolling part connected to the output end of the first driving part, the first rolling part is movably arranged on the supporting assembly and covers the supporting assembly at least from the first inlet to the first outlet, and the thermal deformation temperature of the first rolling part is 300-350 DEG C. According to the technical scheme, the problems that a traditional drying device is not thorough in drying and poor in product packaging quality are effectively solved; the drying time is long, the drying efficiency is low, and the production efficiency is low.

This application provides a structural member, and an electronic device. The structural member includes a substrate and a metal coating layer. The substrate includes an outer surface. The metal coating layer is provided on the outer surface. The substrate is made of a polymer material having a polar group. A heat distortion temperature of the polymer material is greater than or equal to 175° C. A coefficient of thermal expansion of the polymer material is less than or equal to 60*10−6 / K. In the structural member shown in this application, the substrate is made of the polymer material having a polar group. The polar group of the polymer material helps form a strong bonding force with the metal coating layer. The metal coating layer may be directly formed on the outer surface of the substrate without the need to design a priming coat between the metal coating layer and the outer surface.

The invention relates to a preparation method of high-drop-resistance modified polystyrene disposable tableware, and belongs to the technical field of disposable tableware preparation. The preparation method comprises the following steps: mixing nano silicon dioxide and montmorillonite, and adding the mixture into a high-speed mixer for mixing to prepare a composite modifier; the preparation method comprises the following steps: adding polystyrene resin, a composite modifier, a flexibilizer, an antioxidant and a lubricant into a mixer, and mixing to obtain a premix; and adding the premix into a twin-screw extruder, carrying out melt blending, extruding, water-cooling, pelletizing, drying and injection molding to obtain the high-drop-resistance modified polystyrene disposable tableware. The lubricant is prepared from food-grade linoleic acid monoglyceride, food-grade glutathione, food-grade propylene glycol, baking soda and sulfydryl-beta-cyclodextrin; the prepared disposable tableware has the advantages that the anti-falling performance is obviously improved, the heat deformation temperature is high, and the hot food containing requirement can be met; the problems of agglomeration and the like are not easy to occur in the processing process, and the comprehensive performance is excellent.

The utility model discloses a high-straightness aluminum profile heat preservation straightening device which comprises a straightening machine body, guide-in tables are symmetrically fixed to the two sides, away from a straightening roll of the straightening machine body, of a machine table of the straightening machine body, and the straightening machine further comprises a heat preservation mechanism. The heat preservation mechanism comprises a supporting seat, a connecting plate, a main guide box, an outer connecting pipe, a metal corrugated pipe, a pin plate, a supporting and inserting plate, a threaded cylinder, a rotary supporting leg, an L-shaped heat guide pipe and a hot-air blower, and the heat preservation mechanism is arranged at the guide-in table on one side of the feeding end of the straightening machine body and is connected with a flange of the L-shaped heat guide pipe through the hot-air blower to form hot air supply; a full-path heat preservation heat space is constructed by combining the main guide box with the heat preservation lining layer, the outer connecting pipe and the metal corrugated pipe, heat loss of the aluminum profile in the transportation process after straightening and heating is effectively reduced, it is ensured that the aluminum profile still keeps the optimal heat deformation temperature when entering a straightening machine, and therefore the straightness precision of the aluminum profile after straightening is remarkably improved.

The invention relates to the technical field of high polymer material processing and biodegradable plastic, in particular to a preparation method of biodegradable polylactic acid plastic. The invention discloses a preparation method of biodegradable polylactic acid plastic. The polylactic acid plastic is composed of a polylactic acid matrix, an elastomer toughening phase, a nanocellulose enhancer, a reactive compatibilizer and a three-layer core-shell structure microencapsulated enzyme preparation. The preparation method comprises the steps of raw material pretreatment and master batch preparation, reactive melt blending, multi-stage hot stretching orientation and cooling forming, the microencapsulated enzyme preparation sequentially comprises a pH response layer, a temperature response layer and a polymer protection outer layer from inside to outside, and intelligent control over the material degradation behavior is achieved through a synergistic triggering mechanism. The product prepared by the invention has the characteristics of high tensile strength, high elongation at break, high impact strength, high thermal deformation temperature and controllable biodegradability, and effectively solves the technical problem that the toughness, heat resistance and controllable degradability of the polylactic acid material are difficult to consider at the same time.

The invention relates to the technical field of degradable materials, in particular to a degradable polyester resin material and a preparation method thereof. The polyester resin material is mainly prepared from PBAT, PBS, a chitosan stearoyl graft, a chitosan stearoyl catechol double graft, sebacyl dibenzoyl hydrazine, a chain extender containing an epoxy functional group, anhydrous zinc acetate and an antioxidant according to a specific proportion, and a multi-stage reaction extrusion and special heat treatment process is adopted. Through grafting and introduction of a reversible coordination network, the thermal deformation temperature of the polyester material is greatly improved, a heat-sealing window is remarkably widened, and collaborative optimization of mechanical properties and degradation properties is realized. The obtained resin material has excellent film-forming property, thermal and mechanical properties and environmental friendliness, and is suitable for the fields of green packaging and the like.

There is disclosed a flexible pipe for conveying oil and gas field fluids. The pipe comprises a pipe body comprising a first pipe layer formed of a plurality of metallic wires embedded in a composite, the composite comprising a thermoplastic matrix material and a reinforcement dispersed therein. A heat distortion temperature of the composite is at least 200° F. (˜90 °C.) when tested in accordance with ASTM D648 using an outer fibre stress of 0.455 MPa.

The present application relates to the technical field of polyester composite material, in particular to a reinforced flame-retardant polyester composite material for baking integrated machine shell and a preparation method thereof, the composite material takes polybutylene terephthalate and poly(1,4-cyclohexylenedimethylene terephthalate) as main raw materials, and higher heat distortion temperature, heat resistance and high strength are obtained by the cooperation of the two, the polybutylene terephthalate has better fatigue resistance and size stability, and smaller creep; the grafting modification thermoplastic polyester elastomer is added, the special heat-sensitive hydrophobicity and the toughening property of the thermoplastic polyester elastomer are utilized, and the toughening agent and the antioxidant are synergistically used to improve the hydrolysis resistance, high-temperature and high-humidity weather resistance, high-low temperature impact toughness and low shrinkage of the polyester composite material; the synergistic flame-retardant effect of the added bromine-based flame retardant and halogen-free flame retardant can meet the flame-retardant requirements of the material; the glass fiber has the effects of hydrolysis resistance and low warping, and the low shrinkage can promote the structure of the product to be flat, and the polyester composite material is particularly suitable for producing baking integrated machine shell.

The invention discloses a glass fiber vibrating diaphragm of a horn type loudspeaker. The vibrating diaphragm material is prepared through an integrated process of fiber pretreatment, resin compounding, compression molding and post-treatment by taking modified glass fiber as a reinforcing phase and modified thermosetting resin as a matrix phase and being supplemented with a nano functional filler and an interface modifier. Wherein the modified glass fiber is subjected to surface grafting modification treatment, the modified thermosetting resin is a blending system of phenolic resin and epoxy resin, and the nano functional filler is composite particles of nano aluminum nitride and nano titanium dioxide. The density of the novel vibrating diaphragm material is as low as 1.3-1.5 g / cm < 3 >, the flexural modulus reaches 8-10 GPa, the thermal deformation temperature exceeds 220 DEG C, the frequency response range of a horn type loudspeaker can be expanded to 80 Hz-18 kHz, the distortion degree is lower than 1.2%, meanwhile, the novel vibrating diaphragm material has excellent humidity and heat resistance and aging resistance, and is suitable for harsh scenes such as outdoor broadcasting, large-scale performance and industrial sound reinforcement.

The invention discloses a terpolymer heat-resistant agent as well as a preparation method and application thereof, and belongs to the technical field of high polymer material modifiers. Comprising the following raw materials in parts by weight: 100 parts of a monomer, 0.1-3.0 parts of a suspending agent, 0.5-2.0 parts of an initiator and 0.1-1.0 part of a chain transfer agent, the preparation method comprises the following steps: (1) weighing raw materials; (2) preparing a water phase; (3) preparing an organic phase; (4) suspension dispersion; (5) heating and polymerizing; and (6) post-treatment. According to the preparation method, a stable suspension system is formed by taking water as a continuous phase and silicon dioxide as a suspending agent, an initiator is added into an organic monomer phase, alpha-methylstyrene dimer is taken as a chain transfer agent, and terpolymer beads which are controllable in particle size, good in dispersity, high in glass transition temperature and adjustable in molecular weight are obtained through segmented heating polymerization. The obtained terpolymer can be used as a heat-resistant modifier of ABS, SAN, ASA, PVC and alloys thereof, the heat deformation temperature of the material is improved, the processing fluidity is considered, and the preparation method is simple in process, low in cost, convenient in post-treatment and suitable for large-scale production.

The application discloses a preparation method of a reinforced flame-retardant PBT / PET alloy with stable heat deformation temperature, and belongs to the technical field of high polymer materials. In the preparation method, a double-screw extruder with a feeding section, a melting section, a metering section and a machine head is used in sequence, a flame retardant is fed in the melting section, decomposition of the flame retardant can be prevented to the maximum extent, and the shearing and mixing force in the feeding section can be increased, so that the mutual dispersion, mixing, melting and reaction of PBT, PET and other additives are realized to the maximum extent. The nucleating agent is fed in the metering section, thermal decomposition of the organic nucleating agent caused by early addition of the nucleating agent can be avoided to the maximum extent, the efficiency of the organic nucleating agent in the PBT / PET alloy is maximized, the heat deformation temperature of the PBT / PET alloy is more stable, and the performance of the blended material is further improved.