434 results about "Softening point" patented technology

The invention discloses copper-containing slurry suitable for high-temperature sintering and a preparation method thereof, and the copper-containing slurry comprises the following components in percentage by mass: 10-80% of copper powder, 0-80% of silver powder, 0.2-1% of low-softening-point glass powder, 0-3% of high-softening-point glass, 15-20% of an organic carrier and 0.5-3% of an organic auxiliary agent, the low-softening-point glass powder is of a Pb-Te-Li system, the softening temperature ranges from 250 DEG C to 350 DEG C, and the softening temperature is lower than the decomposition temperature of the organic coating agent on the surface of the copper powder. The preparation method comprises the following steps: adding the components according to the ratio, stirring until the components are uniformly dispersed, grinding and sieving to obtain the copper-containing slurry suitable for high-temperature sintering. According to the prepared copper-containing slurry, the low-softening-point glass powder is adopted as a key component, a liquid-phase protection layer is formed in the high-temperature sintering process, oxidation and diffusion of copper are effectively inhibited, and the oxidation resistance and the conductive stability of the copper-containing slurry are improved. Meanwhile, the slurry has good flowability and printing performance, and can meet the requirements of the photovoltaic industry for efficient and low-cost conductive materials.

The invention relates to the technical field of ceramics, and discloses an aluminum oxide ceramic glaze based on domestic waste ceramics, and a preparation method and application thereof. The aluminum oxide ceramic glaze comprises the following raw materials in parts by weight: 28-42 parts of domestic waste ceramic, 25-30 parts of kaolin, 6-12 parts of calcined talc, 3-7 parts of borax, 6-14 parts of aluminum oxide, 3-5 parts of zirconium oxide, 1-3 parts of lanthanum oxide and 3-6 parts of self-repairing particles. The self-repairing particles comprise mesoporous alumina doped with Si and Zr, and V2O5-B2O3-TeO2 series glass which is filled in pores of the mesoporous alumina and has a softening point of 200-300 DEG C. After the glaze is applied to the surface of the aluminum oxide ceramic to form a glaze layer, the insulativity of the aluminum oxide ceramic can be effectively improved, meanwhile, the high bonding stability between the glaze layer and the aluminum oxide ceramic can be achieved, and the problems that the insulativity is greatly reduced and the glaze layer cracks during heat circulation are solved.

To provide a lead with an insulating resin film with which, when applied to a battery, it is possible to eject a gas generated in a region sealed by the outer packaging of the battery to the outside of the region sealed by the outer packaging.SOLUTION: Provided is a lead with an insulating resin film comprising a conductor and an insulating resin film, wherein, when an axis extending along two sides facing each other is defined as an axis X and an axis crossing the axis X is defined as an axis Y with the conductor viewed from above, the insulating resin film is disposed so as to cover the conductor crossing it along the axis X and not to cover both ends of the conductor that are along the axis Y so as to extend off both ends of the conductor and overlap. The insulating resin film has a first layer being in contact with the conductor, and a second layer. The second layer includes a base resin composed primarily of polypropylene, and one or more kinds of additive component selected from a rubber component and an elastomer component. The melting point of the base resin is 110°C to 130°C inclusive, and the softening point of the additive component is 130°C or below. The second layer contains 10 mass% to 40 mass% inclusive of the additive component.SELECTED DRAWING: Figure 3A

A glass material with low refractive index and radiation resistance, method for preparing the same, and applications thereof. The glass material consists of the following components by mole percent: 60-80% SiO2, 2-10% B2O3, 0.1-1% CeO2, 5-10% Na2O, 2-10% K2O, 1-8% Al2O3, 0-2% CaF2, 0-1% As2O3, and 1-5% alkaline earth metal oxides, wherein the alkaline earth metal oxides are selected from at least one of BaO, SrO, CaO, and MgO. The glass material has a refractive index of ≤1.47, a glass transition temperature of ≤550° C., a yield point temperature of 645° C., a softening point temperature of ≤748° C., and a coefficient of thermal expansion of (82-87)×10−7 / ° C. After exposure to a 4700 Gy dose of X-ray radiation, the transmittance decreases by ≤2%. The glass material can be used as cladding glass material for the preparation of optical glass fibers and fiber panels, capable of meeting the requirements for radiation environment applications.

A preparation method of high-strength and high-density isostatic pressing graphite comprises the following steps: firstly, starting from raw materials, modifying aggregate to increase the specific surface area of the aggregate; secondly, starting from a core process mixing and kneading technical mechanism, asphalt with a higher softening point is adopted as a binder to ensure that the binder asphalt is in contact with the aggregate in a molten state, so that the binder asphalt can be more and more uniformly combined with the aggregate, and therefore, the volume density of the isostatic pressing graphite is improved, the resistivity is reduced, and the strength is improved; the volume density of the obtained isostatic pressing graphite is larger than or equal to 1.5 g / cm < 3 >, the compressive strength is larger than or equal to 80 MPa, the breaking strength is larger than or equal to 40 MPa, and the resistivity is 25-46 omega.m. Compared with the traditional process, the process provided by the invention has the advantages that multiple dipping and roasting processes are reduced, the production period is shortened, and the production efficiency is higher.

The present invention relates to the field of carbon-carbon composite materials, and discloses a carbon-carbon composite material, a carbon-ceramic composite material, an anti-oxidation coating, and an aircraft brake disc. The anti-oxidation coating comprises components by weight: 150 parts of an aqueous solution of aluminum dihydrogen phosphate with a content of 37-43%, 70-130 parts of tin powder, 60-120 parts of silicon carbide powder, 15-60 parts of glass powder with a softening point of 600°C-900°C, 15-50 parts of kaolin, and 10-30 parts of boron carbide powder. The anti-oxidation coating can form a coating with good thermal stability and chemical stability by accurately proportioning and mixing a plurality of materials, and can protect the carbon-carbon composite material from oxidation under a high temperature environment.

The invention provides a thermoplastic hot melt adhesive for bonding cover plates of household appliances and a preparation method of the thermoplastic hot melt adhesive. The thermoplastic hot melt adhesive for bonding cover plates of household appliances comprises the following components in parts by mass: 40-70 parts of a high-polarity thermoplastic elastomer; 5 to 10 parts of a copolymer containing amorphous alpha-olefin; 10 to 50 parts of tackifying resin with a high softening point; 0.5 to 2 parts of an antioxidant; 0.5 to 2 parts of a light stabilizer; 0.2 to 0.5 part of a silane coupling agent; wherein the high-polarity thermoplastic elastomer is at least one of TPU, EAA, TPEE, ACM and PA. The bonding performance is improved through the high-polarity thermoplastic elastomer; the copolymer containing the amorphous alpha-olefin promotes wetting and permeation on the surface of an adhered object, so that the adhesion is improved, and the toughness of the high-temperature-resistant hot melt adhesive is improved; physical cross-linking curing is carried out through temperature reduction, the curing process is not directly influenced by humidity, and the sealing requirement of sizing equipment for water vapor is reduced.

Non-amorphous hard carbons are produced by treating a hydrocarbon feedstock comprising asphaltenes to increase its softening point and producing an asphaltenes-based precursor material, purifying asphaltenes from the precursor material, treating the asphaltenes to increase its softening point, and oxidizing and pyrolyzing the asphaltenes. The asphaltenes can be powdered or spun into fibers prior to oxidation and pyrolysis. The non-amorphous hard carbons can have an d002-spacing larger than 0.35 nm and a ratio of ID / IG in their Raman spectra greater than 1.0.

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

The invention relates to the technical field of optical element machining, in particular to an HUD free-form surface mirror machining method which comprises the following steps of S1, substrate selection and cutting, S2, edge treatment, S3, first-stage hot bending forming, S4, second-stage hot bending forming and S5, grinding. According to the machining method disclosed by the invention, through cooperative use of the first-stage hot bending forming and the second-stage hot bending forming, machining operation of the free-form surface mirror with the large size, the large curvature and the small thickness can be achieved; meanwhile, through the two-stage hot bending forming process, primary forming is conducted through first-stage hot bending forming, pressure maintaining is conducted near a softening point through second-stage hot bending forming, the glass is evenly heated and stressed, residual stress is effectively released, the surface type is promoted to present an ideal gradual change trend, edge distortion is greatly reduced, and the high-precision surface type of the final curved mirror is ensured.

The present invention relates to a tread of a tyre having a tread pattern with a longtotal index (As) equal to or less than 17; said tread being characterized in that it is made up of a rubber composition comprising: (a) a crosslinkable unsaturated chain polymer base comprising from 10 to 50 phr of a modified styrene-butadiene copolymer rubber having a glass-transition temperature (Tg), measured by differential scanning calorimetry, of −50° C. or less; (b) a filler comprising 40 to 100 phr of silica; (c) a plasticizer system comprising a hydrocarbon resin and from 8 to 25 phr of octyloleate; and (d) a vulcanization system; said hydrocarbon resin having a softening point of 110° C. or higher, and an average molecular weight comprised between 700 and 1500 g / mol.

The invention provides a prebaked anode with high compressive strength. The prebaked anode comprises the following raw materials: 68-85 parts by mass of calcined petroleum coke particles; 12-25 parts by mass of a modified coal pitch binder, wherein the softening point of the modified coal pitch binder is 105-115 DEG C; and 0.3-0.8 part by mass of a whisker reinforcing agent. The production process comprises the following steps: calcining, crushing and grading, modifying fine powder, preparing a binder, mixing and kneading, forming and roasting. The prebaked anode has the advantages that through multi-stage material collaboration and process innovation, under the condition that an existing production line is not changed at all, the core contradictions that the prebaked anode is insufficient in strength, poor in conductivity and poor in high-temperature stability are synchronously solved.

The invention relates to a low-softening-point spinnable mesophase pitch and a continuous production process thereof, and belongs to the technical field of pitch-based carbon materials. The technical problems of low purity, high softening point, non-uniform structural composition, high production cost and the like of the mesophase pitch prepared by a process for producing the mesophase pitch from aromatic hydrocarbon-rich heavy oil in the prior art are solved. According to the continuous production process disclosed by the invention, coal-based or petroleum-based aromatic hydrocarbon-rich heavy oil is taken as a raw material, raw oil refining is realized through a continuous solvent extraction process, and shallow polycondensed asphalt is prepared by adopting a multi-section heating tubular reactor through a thermal polycondensation process; then the pitch is subjected to a supercritical or subcritical extraction process at a certain temperature and pressure to obtain the mesophase pitch with enriched polycyclic aromatic hydrocarbon molecules with low softening point, narrow molecular weight distribution and uniform structural composition, and the mesophase pitch has excellent spinning performance, so that the prepared carbon fiber has excellent mechanical properties and is suitable for industrial production. The high-value utilization of the aromatic hydrocarbon-rich heavy oil is realized.

The invention relates to an electronic component material technology, and aims to provide an LTCC (Low Temperature Co-Fired Ceramic) material with low dielectric constant and low dielectric loss and a preparation method thereof. The LTCC material is prepared from zinc borosilicate glass and zinc borosilicate microcrystalline glass with different softening point ranges, a ceramic filler, silicate and a metal oxide through ball milling, mixing, modeling and sintering, and the material contains Zn2SiO4 with a devitrified phase. According to the invention, two kinds of zinc borosilicate glass with different softening points are adopted as cooling assistants, and a devitrified phase Zn2SiO4 is generated through reaction in the sintering process, so that the problem of large dielectric loss of a composite system caused by more glass phases can be effectively improved; by flexibly regulating and controlling the content of each component and the components of the auxiliary materials, the sintering characteristics of the glass internal component regulation and control material are optimized, and the success rate of matching and co-firing of the material and silver is further improved; meanwhile, the sintering window is relatively wide, so that good quality stability of the product is favorably kept; the dielectric loss of the composite system is reduced by doping the nucleating agent, and the volume shrinkage process of the material is regulated and controlled.

To provide a hot-melt adhesive composition which exhibits a low reactivation temperature, and superior thermal resistance and workability.SOLUTION: The hot-melt adhesive composition comprises: polyolefin component A with a melting point of 120 to 150°C and a melting enthalpy of 60 to 100 J / g; polyolefin component B having a melting point of 80 to 120°C and a melting enthalpy of less than 60 J / g, polymerized by a single-site catalyst; and tackifying resin component C having a softening point in the range of 130 to 150°C.SELECTED DRAWING: None

The invention provides a preparation method of chlorinated paraffin 70 with a high softening point, and belongs to the technical field of chlorinated paraffins.The preparation method comprises the steps that S1, mixed wax is provided, and raw materials of the mixed wax are Fischer-Tropsch wax and petrochemical wax; s2, feeding the mixed wax into a reactor, then turning on an ultraviolet lamp in the reactor for irradiation, after liquid chlorine is gasified to form chlorine, feeding chlorine into the reactor, heating and carrying out segmented control reaction; s3, after the reaction is finished, blowing air into the reactor, then washing a reaction product with water, and then adding a compound stabilizer into a crude product obtained by washing with water, so as to obtain chlorinated paraffin 70; the chlorine content of the chlorinated paraffin 70 is not less than 69.5%, the softening point is not less than 98 DEG C, and the acid value is not more than 0.1 mgKOH / g. According to the method, hot chlorination and photo-initiation are combined, so that the chlorine content and the softening point of the product are controllable, the production efficiency is high, the reaction speed is high, the reaction temperature is reduced, the production period is shortened, and the product quality is stable.

The invention provides aluminum paste overprinted on a BC battery silver grid line, a preparation method of the aluminum paste and the BC battery grid line, and belongs to the technical field of BC batteries. The aluminum paste comprises 65-90 parts by mass of aluminum powder; 2-10 parts by mass of glass powder; 2-5 parts by mass of an organic resin; 10-20 parts by mass of a solvent; 0-2 parts by mass of an additive; wherein the glass powder adopts bismuth-boron glass powder with the softening point of 400-500 DEG C. By adopting the bismuth-boron glass powder with low softening point temperature, silver-aluminum alloy is reduced during sintering at the medium-high temperature of 580-630 DEG C, the silver-aluminum lap resistance is reduced, the low composite level of the grid line is ensured, the electrical property of the grid line is improved, the replacement of silver paste by aluminum paste in a BC battery is realized while the light conversion efficiency is high, and the cost is reduced.

The invention relates to the technical field of hot-melt pressure-sensitive adhesives, in particular to a hot-melt pressure-sensitive adhesive special for instillation type coating and a preparation method of the hot-melt pressure-sensitive adhesive. The hot-melt pressure-sensitive adhesive is prepared from the following raw materials in parts by mass: 25 to 35 parts of styrene block copolymer, 40 to 50 parts of tackifying resin, 20 to 30 parts of plasticizer and 0.1 to 0.5 part of antioxidant. Wherein the styrene block copolymer is preferably compounded from S-1528, 4411ND and 6241A, the tackifying resin is preferably hydrogenated rosin glyceride with the softening point of 85-90 DEG C, and the plasticizer is medical white oil. The 180-degree peel strength of the prepared product is larger than 5.0 N / 25 mm, the 180-degree viscosity is 2000-6500 cps, the instillation precision can reach + / -8 microns, and the product has excellent adhesive performance and process adaptability and is suitable for instillation type coating scenes.

To provide a busbar electric wire that allows insulation to be maintained for a certain period of time or longer even under high-temperature conditions and enables reduction of breakage risk during forming processing while retaining manufacturability.SOLUTION: A busbar electric wire 1 includes: a metal busbar 10 formed in a flat shape from pure copper; and an insulator 20 covering the metal busbar 10. The insulator 20 has: a silicone resin 21 serving as a main component; and a fire-resistant filler 22 composed of a substance having a second softening point higher than a first softening point, the first softening point being a softening point of the silicone resin 21. The tear-strength / density is 11.5 kN cm3 / m g or more and 23.0 kN cm3 / m g or less, and a residual amount after combustion in heating exceeding the first softening point and below the second softening point is 36 wt.% or more relative to before combustion.SELECTED DRAWING: Figure 2

The invention relates to the field of adhesive preparation, in particular to a preparation method of modified C5 petroleum resin and application of the modified C5 petroleum resin in a hot melt adhesive. According to the method, high-quality synthesis of the C5 petroleum resin under mild conditions is realized by adopting the eutectic solvent catalyst containing AlCl3, so that the softening point of the synthesized petroleum resin is relatively high, and the chromaticity is relatively low; by combining the use of an isoamylene / maleic anhydride combined modifier system, the performance of the C5 resin can be comprehensively improved, and the C5 resin can be more easily matched with the requirements of application scenes, especially the application in hot melt adhesives.

The invention discloses a method for improving molecular weight uniformity of polycarbosilane, and relates to the field of materials and chemical engineering. A packed distillation tower is additionally arranged in a polycarbosilane (PCS) reaction kettle, low-boiling-point small molecules in the reaction kettle in the synthesis process are distilled and separated out through the packed distillation tower, precise separation of the small molecules is achieved in combination with three-stage heating and a corresponding distillation mode, and the low-medium-boiling-point small molecules are removed in real time through rectification separation. The content of low-boiling-point components easily causing molecular weight fluctuation in the PCS is reduced, the randomness of the softening point of the PCS product is remarkably reduced, and the quality stability of the PCS is improved. And the temperature uniformity is improved, a reaction kettle with a larger volume is adapted, the problems of random molecular weight distribution, unstable softening point and the like of the existing PCS are effectively solved, and a reliable process is provided for preparing the high-quality PCS.

The invention discloses cationic polymerization modified pure monomer resin and a preparation method and application thereof.The preparation method of the cationic polymerization modified pure monomer resin adopts a micro-flow field technology and comprises the following steps that a mixed monomer phase and a catalytic solvent phase are prepared and then pumped into a reactor according to the proportion for a reaction; a material receiving container is connected in series behind the reactor and is used for centralized post-treatment of cached materials, and a high-performance modified pure monomer resin product is obtained through a series of post-treatment. The modified pure monomer resin is prepared by using a micro-flow field technology cationic polymerization method, so that the reaction safety is improved, the reaction time is greatly shortened, the production efficiency is improved, meanwhile, the molecular weight distribution of the resin can be reduced, the softening point range is accurately controlled, the product batch is stable, the occupied area of equipment is small, the construction cost is saved, and the workshop utilization rate is improved.

The invention relates to the technical field of road engineering, in particular to a waste plastic modified asphalt compatibility evaluation method based on an infrared spectrum technology, which comprises the following steps: preparing a to-be-tested plastic sheet, and carrying out infrared spectrum analysis on the to-be-tested plastic sheet; calculating the corresponding characteristic peak area of the to-be-tested plastic sheet according to the obtained infrared spectrum data; taking each characteristic peak area of the to-be-tested plastic sheet as an input variable, taking known plastic and asphalt compatibility data as an output variable, and establishing a standard mathematical relationship model; and substituting the infrared spectrum data of the plastic sheet sample into the standard mathematical relationship model, and calculating an output compatibility index, namely the softening point difference. According to the method, the sample preparation process is simplified, and the compatibility of the plastic and the asphalt is predicted by utilizing the infrared spectrum test and the standard mathematical relationship model, so that tedious operation steps in a traditional test method are avoided, and the method has the characteristics of short time consumption, high accuracy, wide adaptability and the like.

The present application relates to the technical field of polymer materials, and discloses a modified resin and a preparation method therefor, a stiffening masterbatch, and a BOPP thin film and a preparation method therefor. The modified resin disclosed in the present application is obtained by grafting and modifying a hydrogenated petroleum resin with a bio-based carboxylic acid monomer. The modified resin has a softening point of 120-165°C, a yellowness index of less than or equal to 15, a volatile organic compound content of less than or equal to 500 ppm, and an acid value of 0.1-25 mgKOH / kg. The raw materials thereof are widely available, and the volatile organic compound content of the modified resin is low. The modified resin is suitable for preparing a BOPP thin film with good optical performance, mechanical properties, and thermodynamic properties.

The invention provides an asphalt material softening point prediction modeling method based on an infrared spectrum, and belongs to the technical field of road engineering material performance prediction. The method comprises the following steps: collecting infrared spectrum data of a multi-source asphalt sample and carrying out standardization pretreatment; fusing and extracting functional group quantitative features, wavelet multi-scale features and principal component dimension reduction features; constructing a high-stability feature subset by adopting a progressive feature optimization strategy guided by a physical mechanism; a self-adaptive Stacking fusion model is constructed and trained, the model integrates four base learners including PLSR, SVR, random forest and gradient boosting regression, and Bayesian ridge regression is used as a meta-learner to realize uncertainty quantification of a prediction result. The method can quickly output the predicted value of the softening point without a physical test, solves the technical problems of low efficiency and poor consistency of a traditional method, and is suitable for production quality control, on-site quick detection and formula optimization of asphalt materials.

Provided are: a hot-melt adhesive composition which contains a large amount of plant-derived components, has excellent adhesive properties, in particular, 180 DEG peel adhesion, constant load retention, and shear retention, and also has high re-peelability; and an adhesive tape which has an adhesive layer that contains the adhesive composition. The hot melt adhesive composition contains at least (A) a styrene block copolymer having a farnesene structure, (B) a thermoplastic resin having a kinematic viscosity (40 DEG C) of 150 mm2 / s to 200 thousand mm2 / s or a number average molecular weight (Mn) of 450 to 4000, and (C) a tackifier resin having a softening point of 100 DEG C or more. The tackifying resin (C) is contained in an amount of 30 to 500 parts by mass per 100 parts by mass of the styrene block copolymer (A).

The present application relates to a capillary array, its manufacturing method, and use. The capillary array includes a plurality of parallel-axially arranged capillaries made of a first glass, each of which has an inner wall provided with a low-refractive-index layer whose refractive index is lower than that of a liquid scintillator, and a light-absorbing layer made of a second glass between any two adjacent capillaries. The capillary array includes a capillary region in which T1 - T2 is 30 to 50°C, where T1 is the softening point of the first glass and T2 is the softening point of the second glass, and the thermal expansion coefficient of the first glass is α1. The capillary region is made of a third glass, which is disposed outside the capillary region and in contact with the outer surface of the capillary region, and has a softening point of T3, where T2 - T3 is 50 to 100°C, and the thermal expansion coefficient of the third glass is α3, where α1 - α3 is 2×10. -7 ~10×10 -7 / °C. The technical problem to be solved by the present application is to manufacture a capillary array such that a liquid scintillator optical fiber panel manufactured using the capillary array has high spatial resolution, high hole diameter uniformity, high numerical aperture, and high coupling efficiency, and the manufacturing process is simple.

The invention discloses a method, system and equipment for optimizing the temperature of a hot bending station mold and a storage medium, belongs to the technical field of glass hot bending forming, and solves the technical problem that the temperature optimization efficiency of the station mold is low. The method comprises the following steps: step 1, constructing a calculation model for calculating the mold temperature of each work station; step 2, inputting the comprehensive coefficient K of each work station mold and the work station beat CT into a calculation model; step 3, inputting the temperature set value of each work station mold into the calculation model to obtain the predicted temperature reached by each work station mold; 4, judging whether the predicted temperature of the last station of the preheating work station reaches the softening point temperature of the glass or not; 5, if not, adjusting the temperature set value of the previous preheating work station, and executing the step 3; otherwise, executing the step 6; and step 6, outputting the optimized temperature set value of each work station mold. The temperature of the work station mold can be automatically calculated and evaluated only by setting the temperature and the CT of each work station, the efficiency of parameter optimization is greatly improved, and the method is visual, rapid and accurate.

The invention discloses a composite carbon material for semiconductors and a preparation method thereof, and relates to the technical field of carbon materials, the composite carbon material for semiconductors is prepared from the following components by weight: 45-60 parts of pitch coke, 26-42 parts of high softening point pitch, 12-32 parts of petroleum coke, 6-18 parts of artificial graphite, 2-6 parts of sulfur, and 3-12 parts of modified carbon fiber; compared with a traditional carbon material, the composite carbon material for the semiconductor has lower resistivity and higher heat conductivity, shows excellent high-temperature stability and structural compactness, can reliably operate for a long time in an extreme environment of semiconductor manufacturing, and remarkably prolongs the service life of a core component of semiconductor equipment.

The invention discloses an expansion insulating sheet which comprises a base material and two expansion bonding layers arranged on the two sides of the base material respectively. The expansion bonding layer comprises epoxy resin with the softening point being 40 DEG C or above, a temperature-sensitive foaming agent, a curing agent, an accelerant, cellulose resin and thermoplastic resin. According to the prepared expansion insulating sheet, the bending resistance of the expansion bonding layer can be remarkably improved, and breakage caused by bending of the expansion bonding layer is avoided; in addition, the adhesiveness of the expansion bonding layers to the base material can be remarkably improved, floating of the bonding layers is avoided in the cutting process, and meanwhile stripping of the expansion bonding layers and the base material caused by mutual bonding of the expansion bonding layers in the storage process is avoided.