1583 results about "Pigment" patented technology

The invention discloses a colorful acid and alkali resistant laser printing ink and a preparation method thereof. The printing ink is composed of the following components in parts by weight: 0 to 30 parts of butanone, 10 to 30 parts of isopropanol, 2 to 6 parts of curing agent, 10 to 15 parts of pigment, and 10 to 30 parts of glycidyl ether epoxy resin. The glycidyl ether epoxy resin is adopted to produce the printing ink, aliphatic polyamine is further chosen as the curing agent, the acid and alkali resistant performance of the printing ink is strengthened through optimizing the formula, thus the shortage that the colorful laser printing ink is lost when being mixed with acid and alkali is overcome, moreover, the color of the laser printing product is more abundant, and the patterns are more clear.

The invention relates to the technical field of coating detection, and particularly provides an aluminum pigment thickness uniformity analysis and detection method and system.The method comprises the steps that a multispectral image and a polarization image of an aluminum pigment coating are obtained, and geometrical shape information of a base material is obtained; analyzing whether the aluminum pigment coating has a non-uniformity defect or not according to the multispectral image and the polarization image; when the non-uniformity defect exists, acquiring the defect type and the optical characteristic of the non-uniformity defect according to the multispectral image and the polarization image; acquiring a target light source parameter and an image sensor target receiving angle according to the defect type, the optical characteristic and the geometrical shape information; adjusting a light source and an image sensor of the aluminum pigment thickness uniformity analysis and detection equipment according to the target light source parameter and the target receiving angle of the image sensor; the method comprises the following steps: acquiring a coating image by using aluminum pigment thickness uniformity analysis and detection equipment, and acquiring non-uniformity defect characteristics according to the coating image; according to the method, adaptive adjustment of detection parameters can be realized.

The invention discloses a special color master batch for high-efficiency cool chinlon and a preparation method of the special color master batch, and relates to the technical field of functional master batch and resin modification. The invention relates to a special color master batch for high-efficiency cool chinlon. The special color master batch is prepared from the following components in parts by mass: 40-70 parts of carrier resin, 15-25 parts of a cool functional material, 3-10 parts of a dispersing agent, 5-25 parts of pigment, 0.5-5 parts of an auxiliary processing aid and 1.5-1.5 parts of an antioxidant. Oxidation degradation of the color master batch in high-temperature processing and long-term use of the fabric can be effectively inhibited through oxidation resistance, the problems of yellowing, mechanical property reduction and the like are reduced, and the stable service cycle of the color master batch and the fabric is prolonged.

The invention relates to the technical field of image recognition, in particular to a red tide algae recognition method based on a hyperspectral image, and the method comprises the following steps: calculating a gradient value of each pixel in a spatial dimension and a spectral dimension according to an original hyperspectral data cube, setting a diffusion coefficient for diffusion, and obtaining a three-dimensional fidelity hyperspectral data cube. According to the method, the gradient change trends of the spatial dimension and the spectral dimension are extracted at the same time pixel by pixel, and the regional differentiation diffusion operation is matched, so that the expression ability of the alga plaque boundary and the consistency of the internal spectral characteristics are enhanced, and the fidelity of the hyperspectral data in fine-grained region identification is improved; upper convex hull calculation of a spectral reflectivity curve and construction of a continuous spectrum background baseline are introduced, and characterization of pigment absorption morphological characteristics is enhanced; and in combination with the characteristic absorption wave bands of chlorophyll and phycobiliary, the synergistic weighted response to the distribution of the algae pigment is realized, and the sensitivity and selectivity of pigment recognition are improved.

The invention belongs to the field of chemical engineering, and relates to a preparation method of a high-chroma bismuth vanadate pigment for a coating, which comprises the following steps: mixing a titanium-based ion sieve with an acidic vanadium leachate, filtering after the reaction is completed to obtain a first filtrate, adding mercaptoacetic acid into the first filtrate, and filtering after the reaction is completed to obtain a second filtrate; preparing a bismuth salt solution containing yttrium ions and zirconium ions, mixing the bismuth salt solution with the second filtrate, adjusting the pH value to be in linear gradient change from acidity to neutrality, heating to a first temperature at a set heating rate, aging, centrifuging and drying to obtain a precursor; and calcining the precursor at a second temperature to obtain the bismuth vanadate pigment. According to the method, the acid vanadium leaching solution is used as a raw material, and the bismuth vanadate pigment with high chromaticity and chemical stability is obtained while the production cost is reduced through an innovative ion sieve purification technology and lattice stabilization doping, so that the method has obvious economic benefits.

The invention relates to the technical field of processing, testing or inspection of aircraft parts, and provides a method for detecting surface defects of an aluminum alloy plate with an epoxy coating. The method comprises the following steps: applying an epoxy coating doped with a zinc yellow pigment to an anodic oxide film to construct a coating test piece with a color difference indication function, and placing the coating test piece in a coastal atmospheric environment for exposure sampling. In the detection process, the gloss loss rate, the chromatic aberration, the contact angle, the defect area proportion and the corrosion current density are collected, a dynamic correction coefficient is calculated according to the hydrolysis degree of the zinc yellow pigment, all parameter thresholds are adjusted in a self-adaptive mode, and a threshold set is constructed. And in combination with scanning electron microscope image segmentation and Tafel extrapolation analysis, multi-source indexes are fused to judge whether the coating is invalid. According to the method, the hydrolysis behavior of the zinc yellow pigment can be tracked in real time, the judgment standards of optical, morphology and electrochemical indexes are automatically corrected, and the accuracy and reliability of failure detection of the epoxy coating aluminum alloy plate under the coastal service condition are improved.

The invention discloses a breathable plant leaf biomimetic material with antifouling, self-cleaning and spectrum simulation properties and a preparation method of the breathable plant leaf biomimetic material. The breathable plant leaf biomimetic material can be applied to a base material through a two-step coating method. The first layer is a mesophyll-like porous dual-network hydrogel structure, hyperspectral pigment and moisture absorption salt are dispersed in the first layer, spectral characteristics of plant leaves in visible light and near infrared bands are simulated, and a water transpiration function controlled by plant pores is reproduced through a pore structure and a salt medium, so that stable spectral response and dynamic water exchange are realized; and the second layer is a leaf-skin-imitated coating, and has long-term stable antifouling and self-cleaning characteristics through a liquid-like super-smooth hydrophobic surface structure. The plant leaf spectrum simulation coating has anti-mud and hydrophobic properties, can still keep an excellent plant leaf spectrum simulation effect after being washed by rainwater, and can realize high-weather-resistance spectrum simulation.

The invention relates to an electrophotographic photoreceptor, a process cartridge, and an image forming apparatus. The electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer of a single-layer type disposed on the conductive substrate. The photosensitive layer has an absorption coefficient of 0.008 or less at a wavelength of 1000 nm and contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material. The charge generating material is at least one selected from a hydroxygallium phthalocyanine pigment and a chlorogallium phthalocyanine pigment and is contained in an amount of 0.9% by weight or more and 1.8% by weight or less relative to the binder resin.

The invention discloses engineering chlamydomonas reinhardtii for synthesizing high-value pigment and a construction method and application thereof.An engineering chlamydomonas reinhardtii strain Blup-BKT-CHYB-CHLC is preserved in the China General Microbiological Culture Collection Center on September 1, 2025, and the preservation number is CGMCC NO.46634. The content of astaxanthin in the constructed engineering chlamydomonas reinhardtii strain reaches 25.5 mg / L, and the content of astaxanthin in the engineering chlamydomonas reinhardtii strain reaches 9.5 mg / L; in addition, the light energy utilization efficiency is remarkably enhanced, the stress resistance is improved, very strong oxidation resistance is achieved, the accumulation of astaxanthin endows the engineering strain with highlight tolerance, the yield of high-value pigments is increased, and the biomass of the engineering strain is greatly superior to that of a wild strain under the highlight condition. In addition, the chlorophyll c synthase is applied to the reconstruction of a pigment system of the chlamydomonas reinhardtii for the first time, a frontier tool is quickly converted, and a molecular mechanism of'chlorophyll c-astaxanthin-blue pigment 'for synergistically regulating the photosynthetic efficiency of the chlamydomonas reinhardtii and product synthesis is clarified for the first time. The research blank of pigment system coupling regulation and control of photosynthesis and metabolism in the chlamydomonas reinhardtii is filled.

The invention belongs to the technical field of photoresists, and relates to a wide-color-gamut yellow dye for a color filter, a synthesis method of the wide-color-gamut yellow dye, a green photoresist and a preparation method of the green photoresist. The green photoresist is prepared from the following raw materials in parts by weight: 4 to 8 parts of green pigment, 3 to 8 parts of resin, 3 to 10 parts of acrylic monomer, 0.5 to 2 parts of photoinitiator, 0.2 to 0.4 part of auxiliary agent and 75 to 85 parts of organic solvent. The synthesized yellow dye has good photoresist system adaptability and high molar absorption coefficient, and meanwhile, due to the fact that acrylic acid is grafted, acrylic acid on the yellow dye has carbon-carbon double bonds, under the action of a photoinitiator, after bond breaking, the yellow dye can react with resin or an acrylic monomer and is cured in a film, and the yellow dye has good chemical resistance.

The invention relates to a wear-resistant self-curing insulating coating material and a preparation method thereof, and belongs to the technical field of coatings. Comprising the following components in parts by weight: 50-80 parts of epoxy resin, 5-10 parts of polydimethylsiloxane, 5-15 parts of a curing agent, 15-30 parts of filler, 2-5 parts of a dispersing agent, 3-5 parts of a flatting agent, 5-15 parts of a wear-resistant agent, 5-8 parts of a flame retardant, 3-5 parts of a coupling agent and 1-3 parts of pigment. The coating material prepared by the invention uses a light filler, has an ultra-light characteristic, has excellent insulativity and wear resistance, and can be self-cured at room temperature.

The invention relates to the technical field of pigment dispersity monitoring, in particular to a pigment dispersity monitoring control system for washing-free printed fabric. Acquiring a sample initial parameter of the sample, applying a preset disturbance signal to the sample, and collecting a sample disturbance parameter; measuring and calculating a stability index according to the sample initial parameter and the sample disturbance parameter, performing baseline calibration, and outputting a calibrated sample state parameter; measuring the flow process of the sample, and analyzing the dynamic change of a measurement signal to obtain process characteristic parameters of sample particles; identifying the sample state parameter and the process characteristic parameter to obtain a process offset coefficient; performing state compensation on the sample based on the process offset coefficient to obtain a compensated process transmission parameter; acquiring operation state parameters of the production equipment, and reading quality characteristic parameters of the processing object based on the optical detection device; according to the invention, process abnormity is identified based on the operation state parameters, the quality characteristic parameters and the process transmission parameters, and early warning control is carried out.

The invention relates to a high-entropy oxide-boron nitride composite radiation refrigeration pigment and a preparation method thereof, the pigment is powder, the general formula of the high-entropy oxide is (A1xA2yA3zA4uA5v) O2, A1, A2, A3, A4 and A5 are any five elements of Ce, Zr, Hf, Ti, Sn and Ge, x, y, z, u and v are equal or approximately equal, and x + y + z + u + v = 1; the mass fraction ratio of the high-entropy oxide to the boron nitride is (60-90 wt%): (40-10 wt%). Meanwhile, the invention also discloses a preparation method of the pigment. The pigment disclosed by the invention has high thermal conductivity, and can be widely applied to the fields of thermal management, photovoltaic cooling, aerospace radiation heat dissipation and the like as a radiation refrigeration material.

The invention relates to a high-reflectivity high-entropy rare earth phosphate radiation refrigeration pigment, the high-entropy rare earth phosphate radiation refrigeration pigment has a monazite phase with a monoclinic system structure, the chemical formula of the pigment is (A1xA2yA3zA4uA5v) PO4, A1, A2, A3, A4 and A5 are any five rare earth cations of La, Ce, Yb, Gd, Nd and Eu, the cations are in an equimolar ratio, and x, y, z, u and v meet the condition that x + y + z + u + v = 2. Meanwhile, the invention also discloses a preparation method of the high-entropy rare earth phosphate radiation refrigeration pigment. The high-entropy rare earth phosphate radiation refrigeration pigment has high infrared emissivity in air, the emissivity reaches 0.90 or above within the wave band of 8-13 microns, the solar reflectivity reaches 0.93 or above within the wave band of 0.3-2.5 microns, and the high-entropy rare earth phosphate radiation refrigeration pigment has wide application prospects in the fields of building energy conservation, urban heat island effect reduction, photovoltaic power generation efficiency improvement and the like.

The invention relates to a composition for fading acne marks and application thereof. The composition for fading acne marks comprises PDRN, a lactobacillus / algae extract fermentation product and a fig fruit extract. The acne mark fading composition disclosed by the invention has a synergistic interaction effect, and can efficiently inhibit release of inflammatory factors and fade red marks caused by vasodilatation from the source; the traditional Chinese medicine composition has the advantages that melanin generation can be more synchronously intervened, black marks caused by pigmentation can be effectively prevented and improved, red acne marks and black acne marks can be simultaneously improved through multiple channels by the synergistic mechanism, and the traditional Chinese medicine composition is mild and non-irritant and is more suitable for improving mixed acne marks.

The invention relates to the technical field of functional polymer composite materials, in particular to an intermediate film for laminated glass based on color generation of a photonic crystal structure and a preparation method of the intermediate film. The intermediate film comprises a thermoplastic resin matrix and a three-dimensional photonic crystal structure region dispersed in the thermoplastic resin matrix, wherein the three-dimensional photonic crystal structure region is formed by self-assembly of monodisperse microspheres, and the central wavelength of a photonic forbidden band of the region is located in a visible light range. According to the invention, a three-dimensional photonic crystal structure is constructed in the intermediate film, and structural color generation is generated by utilizing selective reflection of the photonic band gap effect on visible light with a specific wavelength. According to the laminated glass, the color is generated by interference of light instead of absorption of chemical pigments, so that the color can be continuously and regularly changed along with the change of an observation angle or an incident light angle, the dynamic and changing visual aesthetic feeling is given to the laminated glass, and the higher requirements of the fields of modern buildings, automobiles and the like on dynamic aesthetics and personalized appearance are met.

The invention discloses an anti-aging bronze powder pigment and a preparation method and application thereof in the technical field of bronze powder pigments, and the anti-aging bronze powder pigment takes copper-zinc alloy as a base material, and is sequentially connected with a composite chemical passivation layer, a functionalized organic-inorganic hybrid compact barrier layer and a surface super-hydrophobic layer through chemical bonding from inside to outside; wherein the composite chemical passivation layer is formed by treating a passivation solution containing phytic acid, ammonium metavanadate and sodium tungstate; the functionalized organic-inorganic hybrid compact barrier layer is constructed by a silane mixed solution containing 3-mercaptopropyltriethoxysilane, a reaction type ultraviolet light absorber Si-BP, a reaction type hindered amine light stabilizer Si-HALS and tetraethyl orthosilicate through a sol-gel process. Through the design of a multi-layer composite system, the aging resistance of the bronze powder is improved, and meanwhile, the optical decoration performance can be reserved to the maximum extent, so that the dual strict requirements of high-end outdoor applications such as automobile coatings on durability and visual texture can be met.

The invention provides a reverse printing ink system based on a positive photosensitive mechanism and application thereof. The printing ink system comprises three types of products, namely black matte printing ink, high-reflectivity white printing ink and green printing ink, the production process of the ink system comprises the following steps: 1) synthesizing the film-forming resin; (2) sharing the film-forming resin with a pigment system, a dispersion medium and a functional additive; and 3) applying the reverse ink system to PCB manufacturing. According to the method, the characteristic of'dissolution in an exposure area 'is realized through positive light sensing, and the problems of scanning splicing printing, color difference and insufficient reflectivity in a traditional solder mask process are solved by matching with a special developing solution and a DI exposure light spot shaping technology; compared with the prior art, the reverse printing ink system has the advantages that the yellowing index, the resolution ratio, the heat resistance and the like are remarkably improved, and the reverse printing ink system is suitable for manufacturing a high-end mini LED / micro LED PCB (Printed Circuit Board).

Described is an ophthalmic device that contains visible light filters. The ophthalmic device is a free radical reaction product of a reactive mixture comprising: one or more monomers suitable for making the ophthalmic device; a first visible light filtering compound, the first visible light filtering compound having a visible light absorption maximum between 430 and 480 nm and a full width half maximum (FWHM) at the visible light absorption maximum of at least 35 nm and up to 150 nanometers, wherein the compound is photostable, and wherein the compound has a molar extinction coefficient of at least 7740 L·mol−1·cm−1; and a second visible light filtering compound. The devices may provide one or more benefits to wearers, including enhanced macular pigment optical density (MPOD), as well as improved color perception and color enhancement.

The invention discloses a weather-resistant pearlescent pigment and a preparation method thereof. The weather-resistant pearlescent pigment comprises a pearlescent pigment of which the outer surface is coated with a protective layer, the main component of the protective layer is silicon dioxide, and the protective layer is combined with the pigment substrate in a covalent bond form; and the protective layer is formed by curing polysilazane. The invention also discloses a color coating composition containing the weather-resistant pearlescent pigment, a cured coating, and a glass panel and a photovoltaic module containing the cured coating. According to the weather-resistant pearlescent pigment, a high-hardness silicon dioxide protection layer is formed on the surface of a common pearlescent pigment, and the weather resistance of the pearlescent pigment is remarkably improved.

The invention discloses a smoked mural restoration method and system based on a terahertz signal and an X-ray fluorescence signal and a storage medium. The method comprises the following steps: acquiring coordinates of acquisition points on a smoked mural, the terahertz signal and the X-ray fluorescence signal; obtaining thickness information based on the terahertz signal; obtaining component information based on the X-ray fluorescence signal, and obtaining corresponding color information according to the component information; correlating the corresponding thickness information, component information and color information of the pigment layer through the coordinates, and correcting the color information according to the thickness information and the component information of the pigment layer; and outputting the thickness information, the component information and the corrected color information of the acquisition points. According to the method, the color information is corrected based on the thickness information and the component information, the influence of the optical thickness on the color rendering degree of the pigment layer is visually reflected, multi-dimensional correlation analysis of the internal structure and the surface layer components of the smoked mural is achieved, the color of the mural can be restored with high precision under smoked shielding, and the method has wide popularization value.

Existing pulse oximeters have impaired accuracy in measuring blood oxygen levels (SpO2) in patients of color, where the presence of melanin in the skin tends to interfere with measurements of pulse oximetry, resulting in an overestimation of SpO2. Thus, the pulse oximeter often reports a higher oxygen saturation for patients with darker skin tones, often with increasing bias as the actual saturation (SaO2) decreases. This bias is further reinforced by calibration based on individuals with light skin pigmentation, which may lead to inequitable healthcare for patients of color. Our proposed solution is to modify current pulse oximetry calculations—which utilize the relative tissue absorbance of red and infrared light to estimate SpO2—to account for the concentration of melanin by additionally measuring the skin absorbance of UV˜A light. This derived concentration of melanin can then be used to modify the pulse oximetry algorithm output, thus estimating SpO2 more accurately for patients of color.

The utility model discloses spinning forming equipment based on colored noctilucent pre-oriented yarn, which relates to the technical field of spinning forming equipment and comprises a screw extruder, a stirring mechanism is arranged on the left side of the screw extruder, and a filtering mechanism is arranged between the screw extruder and the stirring mechanism and used for filtering melt. The filtering mechanism comprises a multi-stage filtering unit and a backwashing unit, the multi-stage filtering unit is arranged above the stirring mechanism and comprises a filtering barrel, the multi-stage gradient filtering unit is arranged, a nested filtering net structure is adopted in the filtering barrel, and the aperture of a first filtering net barrel is smaller than that of a second filtering net barrel, so that graded fine filtering of the melt is realized. Agglomerated particles and impurities formed by noctilucent pigment or fluorescent dye in melt can be effectively intercepted, and the blocking risk of the spinneret plate is remarkably reduced. Meanwhile, the filter screen cylinder is detachably installed through the first clamping groove and the second clamping groove, maintenance and replacement are convenient, and it is ensured that the filtering effect is continuous and stable.

The utility model provides a rotary drum type color mixing device for design, which comprises a base, a cylinder fixedly mounted on the base, six layers of sliding rails fixedly mounted on the outer wall of the cylinder, a sliding ring slidably mounted on the sliding rails, three pigment trays fixedly connected to the peripheral side of the sliding ring, and a color mixing tank and a cleaning tank arranged on the base around the cylinder, the top end of the cylinder is fixedly provided with a top plate, and the periphery of the top plate is fixedly provided with sector plates. The sliding ring is rotatably connected outside the cylinder, the paint plates are fixedly connected outside the sliding ring, the paint plates are installed in a stacked mode, the paint plates on the upper layer can seal the paint plates on the lower layer, the lifting rod is arranged in the cylinder, and the lifting rod ascends and descends to drive the limiting ball to move through the cross rod, so that limiting of the sliding ring is relieved, and the sliding ring on the upper layer is rotated. The sliding rings and the pigment plates are fixedly connected through the countersunk bolts, so that disassembly, assembly, cleaning or maintenance and replacement are facilitated.

The present disclosure relates to a blow molded article having a visual effect. The invention provides a blow-molded article obtained by blow-molding a preform made by parallel flow co-injection, the blow-molded article having, in at least one region, a wall formed of three layers wherein the outer layer is transparent and the inner layer is transparent and the outer layer is transparent. And the inner layer comprises an effect pigment visible through the transparent layer. The articles according to the invention have improved gloss, lower haze and higher delamination resistance compared to previous articles. The invention also relates to a preform for manufacturing an article as described above and to a method for manufacturing a preform and an article.

In a printed article, pigment flakes are magnetically aligned so as to form curved patterns in a plurality of cross-sections normal a continuous imaginary line, wherein radii of the curved patterns increase along the imaginary line from the first point to the second point. When light is incident upon the aligned pigment flakes from a light source, light reflected from the aligned pattern forms a bright image which appears to gradually change its shape and move from one side of the continuous imaginary line to another side of the continuous imaginary line when the substrate is tilted with respect to the light source.

The utility model discloses a sulfonation reaction device for pigment preparation, and relates to the technical field of pigment preparation devices. The sulfonation reaction device for pigment preparation comprises a basic support, a reaction container, a guide rail frame, a movable frame, an upper cover, a lifting unit, a supporting rod and a depth adjusting unit. According to the sulfonation reaction device for pigment preparation, through the design of the lifting unit, separation operation of the upper cover and the reaction container is convenient, when a stirring structure and a temperature sensor need to be cleaned or maintained, only the lifting unit needs to be started, the stirring structure and the temperature sensor can be synchronously driven to rise, cleaning or maintenance work can be conducted, operation is convenient, and practicability is high. Meanwhile, the depth adjusting unit is arranged to adjust the position of the supporting rod, so that the depth of the temperature sensor in the reaction container can be conveniently adjusted in real time, temperature information of various depths can be monitored in real time, it is ensured that the reaction temperature condition is easy to control and is kept stable, and the use requirement is met.

The invention relates to a colored curable resin composition, a color filter, a display device and a solid-state imaging device. The purpose of the present invention is to provide a colored curable resin composition capable of producing a color filter having improved color separability from green light. [Solution] The colored curable resin composition according to the present invention is characterized by containing a colorant, a resin, a polymerizable compound, and a polymerization initiator, the colorant including xanthene pigment, purple pigment, and blue pigment, and the content of the xanthene pigment is 8-45 parts by mass per 100 parts by mass of the blue pigment.

Disclosed are a nano colorimetric sensor based on natural pigment signal enhancement and a preparation method thereof, the nano colorimetric sensor being a nano colorimetric sensor array formed by nano colorimetric materials, the nano colorimetric materials comprising POEs materials and natural pigments. After 6 POEs materials and 4 natural pigments are respectively self-assembled under magnetic stirring, the nano colorimetric materials with sensitization effect are screened through RGB response values and Euclidean distances, the precursor substance mass ratio is optimized, and finally the sensitization effect is verified. The nano colorimetric sensor has high sensitivity, the colorimetric material is green and environmentally friendly, and can effectively realize rapid quantitative detection of the freshness of aquatic products, and has important practical significance in meeting the needs of consumers for food quality and safety and maintaining market order.

The invention is applicable to the technical field of battery devices, and provides a battery device and electric equipment, the battery device comprises a shell part, and the shell part is used as an appearance part of the battery device. The shell part comprises a base body and a protective layer structure. The base body has a first outer surface facing an external environment of the battery device. The protective layer structure is arranged on the first outer surface. The protection layer structure comprises a heat insulation layer, a reflection layer and a pigment layer. The heat insulation layer is arranged on the first outer surface. The reflecting layer is arranged on the side, away from the first outer surface, of the heat insulation layer and used for reflecting infrared radiation and transmitting visible light. The pigment layer is arranged between the heat insulation layer and the reflection layer. The heat insulation layer obstructs heat transmission and reduces the influence of high temperature or low temperature of the external environment on the shell part and the interior of the shell part. The pigment layer colors the first outer surface. The reflecting layer reflects infrared light radiation to the external environment, the probability that heat radiation of infrared light is transmitted to the pigment layer is reduced, the probability that the pigment layer is decomposed due to the heat effect of the infrared light is reduced, and the color changing probability of the pigment layer is reduced.