39 results about "Polyvinylidene chloride" patented technology

The invention relates to the field of high polymer materials, and particularly discloses a high-oxygen-barrier moisture-barrier PE film and a process. The high-oxygen-barrier moisture-barrier PE film comprises a corona layer, a barrier layer and a heat sealing layer which are connected in sequence, the barrier layer comprises the following raw materials in parts by weight: 90-95 parts of polyethylene and 5-10 parts of polyvinylidene chloride, and the heat sealing layer is made of a polyethylene material; in addition, the preparation method provided by the invention has the advantages that the oxygen and moisture resistance of the polyethylene single film is improved, and meanwhile, the printing requirement is met.

The invention discloses an infrared barrier PVB (polyvinyl butyral) intermediate film and a preparation method, and relates to the technical field of environmental functional glass materials, the intermediate film comprises 60-75 parts of polyvinyl butyral resin, 25-35 parts of a plasticizer, 0.5-3 parts of nano tin antimony oxide, 0.1-0.5 part of an ultraviolet absorbent, 0.05-0.2 part of an antioxidant and 0.1-0.5 part of a dispersant, the preparation method comprises the steps of nano infrared blocking agent pre-dispersion, mixing, twin-screw extrusion molding, tape casting cooling, surface treatment and the like, the surface-modified nano tin antimony oxide is introduced as the infrared blocking agent, infrared radiation at the wave band of 780-1300 nm is effectively blocked, the infrared blocking rate reaches 85% or above, the visible light transmittance is larger than 80%, the technology is mature and stable, the cost is low, and the preparation method is suitable for industrial production. The prepared intermediate film can be applied to building and automobile laminated glass, and the heat insulation and energy saving effects are achieved.

The invention relates to a water-based quick-drying fireproof coating and a preparation method thereof. The water-based quick-drying fireproof coating comprises polyacrylic resin, a water-based polyvinylidene chloride (PVDC) emulsion, a flame retardant, reinforced fibers, a pigment filler, an early strength agent, a corrosion inhibitor, an auxiliary agent, a drier and water. The fireproof coating disclosed by the invention is high in drying rate, high in bonding strength and environment-friendly, and can be rapidly expanded to form a fireproof heat-insulating protective layer when a fire disaster occurs, so that the fire endurance of a steel structure is improved, and the situation that a building collapses due to the fact that the steel structure loses supporting force is avoided; and meanwhile, the composite material has excellent corrosion resistance, weather resistance and vibration fatigue resistance.

The invention discloses a production method of a PA / PE high-barrier composite film bag. The composite film bag comprises an outer layer, a middle layer and an inner layer, the outer layer is prepared from PA6, glass fibers, maleic anhydride grafted polyethylene, an antioxidant, a slipping agent, an ultraviolet light absorber, titanium dioxide, nano silicon dioxide and polyimide; the middle layer is prepared from EVOH (Ethylene Vinyl Alcohol), polyamide-imide, nano montmorillonite, maleic anhydride grafted polypropylene, an antioxidant, a slipping agent, terpene resin, polyvinylidene chloride and polybutylene terephthalate; the inner layer is prepared from HDPE, LLDPE, mPE, an antistatic agent, silicon dioxide, dioctyl phthalate, an antibacterial agent and polylactic acid. The composite film bag prepared by the invention not only has high barrier property and good strength, but also has various functions.

The invention relates to the technical field of nano optical materials, in particular to a quantum dot-multi-component composite particle, a quantum dot diffusion plate and a preparation method, and the quantum dot-multi-component composite particle comprises an original quantum dot particle serving as a core, an antioxidant ligand layer coating the surface of the original quantum dot particle, and a quantum dot dispersion layer coating the surface of the original quantum dot particle. The surface of the antioxidant ligand layer is coated with the ternary polymer barrier layer; and the ternary polymer barrier layer contains an ethylene-vinyl alcohol copolymer, polyvinylidene chloride and polystyrene. An antioxidant is directly coordinated on the surfaces of the quantum dots to form an antioxidant ligand layer, so that targeted protection of the quantum dots is realized; the ternary polymer barrier layer is adopted to coat the original quantum dot particles coated with the antioxidant ligand layer, so that the ethylene-vinyl alcohol copolymer plays a role in oxygen isolation, the polyvinylidene chloride plays a role in water resistance, and the polystyrene can improve the compatibility, thereby improving the water and oxygen resistance of the quantum dot-multi-component composite particles and improving the water and oxygen resistance of the quantum dot-multi-component composite particles. Meanwhile, the compatibility of the nanoparticles and polystyrene is improved.

The application relates to the field of high polymer materials, and particularly discloses a high-oxygen-resistance and high-moisture-resistance PE film and a process. The high-oxygen-resistance and high-moisture-resistance PE film comprises a corona layer, a barrier layer and a heat-sealing layer which are sequentially connected, the barrier layer comprises the following raw materials in parts by weight: 90-95 parts of polyethylene and 5-10 parts of polyvinylidene chloride, and the heat-sealing layer is made of polyethylene material; in addition, the preparation method has the advantages that the oxygen-resistance and moisture-resistance performance of the polyethylene single film is improved, and the printing requirement is met.

The application discloses a kind of water-based intumescent steel structure fire-retardant coating, including A component and B component, mass ratio is 15:1-20:1;With mass parts, A component includes 20-40 parts of acrylic acid salt, 0-10 parts of water-based polyvinylidene chloride (PVDC) emulsion, 35-75 parts of intumescent flame retardant, 0.5-2 parts of organic alkali, 0.2-2 parts of reinforcing fiber, 5-20 parts of filler, 2-10 parts of auxiliary agent and 10-30 parts of water;With mass parts, B component includes 1-5 parts of curing accelerator and 5-20 parts of water.The application further provides the preparation method of the water-based intumescent steel structure fire-retardant coating and its construction technology.The fire-retardant coating of the application is environmentally friendly, can rapidly expand to form fire-resistant and heat-insulating protective layer when fire occurs, improve the fire resistance limit of steel structure, avoid building collapse caused by loss of support force of steel structure;Meanwhile, it has excellent corrosion resistance, weather resistance and vibration fatigue resistance.

The invention provides a light photovoltaic module with heat insulation and noise reduction functions and a preparation method thereof, and relates to the technical field of photovoltaic modules. The light photovoltaic module structure comprises a front plate, a packaging layer, a photovoltaic battery piece, a micro-cavity composite layer and a back plate, the microcavity composite layer comprises the following components: aerogel particles, polymer foaming microspheres and a thermosetting resin matrix; the porosity of the aerogel particles is 85%-99%, and the particle size of the polymer foaming microspheres is 3-30 [mu] m; the polymer foaming microspheres are thermoplastic polymer microspheres and are selected from at least one of polymethyl methacrylate, polyacrylonitrile and polyvinylidene chloride. According to the light-heat-sound multifunctional integrated light photovoltaic module and the preparation method thereof, the defects that an existing light photovoltaic module is single in function and cannot meet the heat insulation and sound insulation requirements of a building envelope structure are overcome, and the light-heat-sound multifunctional integrated light photovoltaic module integrating the power generation function, the heat insulation function and the noise reduction function and the preparation method of the light-heat-sound multifunctional integrated light photovoltaic module are provided.

In one aspect, the disclosure relates to a method for supplementing syngas to produce a precursor composition for synthesis of at least one industrially useful chemical, the method comprising contacting the syngas with an external source of hydrogen. In an aspect, industrially useful chemical comprises methanol and the external source of hydrogen comprises hydrogen produced by steam methane reforming (SMR), hydrogen produced by steam injected onto molten metals, or another hydrogen source. In some aspects, the external source of hydrogen comprises hydrogen produced by a halogen acid contacting scrap metal, wherein the halogen acid can be produced by gasifying a halogen-containing polymer such as, for example, polyvinylchloride (PVC), polyvinylidene chloride (PVDC), or any combination thereof. Also disclosed herein are systems useful for carrying out the disclosed methods.

The invention relates to a photovoltaic module and a preparation method thereof. The photovoltaic module comprises a packaging panel, a first packaging adhesive film, a battery piece, a second packaging adhesive film and a packaging back plate which are arranged in a stacked mode. The photovoltaic module further comprises a first blocking layer and / or a second blocking layer, the first blocking layer is arranged between the packaging panel and the first packaging adhesive film, and the second blocking layer is arranged between the second packaging adhesive film and the packaging backboard. The barrier layer comprises a polymer matrix and barrier reinforced particles, the polymer matrix is selected from at least one of polyvinylidene fluoride, polytetrafluoroethylene and polyvinylidene chloride, and the barrier reinforced particles are selected from at least one of nano aluminum oxide, nano titanium dioxide and nano silicon dioxide. Through the arrangement of the barrier layer, the photovoltaic module has good salt spray corrosion resistance.

The present invention relates to a polyvinylidene chloride (PVDC)-based composite and a method for preparing the same, and the PVDC-based composite comprises: a core comprising a PVDC-based polymer, and a shell surrounding the core and comprising wax, wherein the wax is nano-sized particles.

This invention relates to an aramid rope conveyor belt and its preparation method, belonging to the field of conveyor belt manufacturing technology. The aramid rope conveyor belt, by mass fraction, comprises: a composite coating, an aramid rope core layer, and an elastic buffer layer; the aramid rope core layer comprises modified aramid fibers; the elastic buffer layer, by mass fraction, comprises high-saturation nitrile rubber, carbon black, peroxide, and plasticizer; the composite coating, by mass fraction, comprises, from the outside to the inside, a hydrophobic wear-resistant layer, a barrier layer, and a filler layer; the hydrophobic wear-resistant layer comprises modified polyurethane, nano-ZnO, zinc stearate, titanate coupling agent, and defoamer; the barrier layer comprises fluororubber, polyvinylidene chloride, and nano-montmorillonite; and the filler layer comprises polytetrafluoroethylene nano-dispersion, nano-graphene, and silane coupling agent. The aramid rope conveyor belt of this invention can adapt to high-humidity and high-salt-spray environments such as ports, extending the service life of the conveyor belt.

The present application relates to a kind of anticorrosive thermal insulation powder coating and thermal insulation pipeline, belong to the technical field of coating.A kind of anticorrosive thermal insulation powder coating, including primer, intermediate layer coating and surface layer coating;Primer includes the following raw materials: bisphenol A type epoxy resin, curing agent, accelerator, thermoplastic elastomer, silicone resin, coupling agent, filler, leveling agent, defoaming agent;Intermediate layer coating includes the raw material: maleic anhydride grafted polypropylene resin, aerogel powder, hollow ceramic microsphere, foaming agent, thermoplastic elastomer, silicone resin, antioxidant;Surface layer coating includes the following raw materials: polyvinylidene chloride resin, heat stabilizer, maleic anhydride grafted polypropylene resin, pigment and filler, antioxidant.The problem of penetration accelerated corrosion of the inner wall of thermal insulation pipe when conveying high-temperature water is solved in the form of three-layer structure.

The invention belongs to the technical field of variable information recording, and relates to a high-protection type transparent thermosensitive film material and a preparation process thereof, the film material comprises a transparent printing head protection layer, a high-transmittance protection coating, a color development layer, a transparent bottom coating and a film base material which are sequentially arranged from top to bottom; the transparent printing head protection layer is prepared from the following raw materials in parts by mass: 5 to 8 parts of high-transmittance polytetrafluoroethylene wax emulsion, 3 to 5 parts of high-transmittance ethylene oxide wax emulsion, 10 to 15 parts of extender pigment, 10 to 15 parts of epoxy resin liquid, 6 to 10 parts of modified amine curing agent and a high-transmittance protection coating. The printing ink comprises the following components in parts by mass: 15-20 parts of extender pigment and 20-25 parts of polyvinylidene chloride resin emulsion. The prepared product can be used in various fields of medical and chemical engineering, electronic information and the like, has good chemical reagent resistance while meeting the requirement for convenient printing, and can still display all variable information after being wiped by chemical reagents such as alcohol and strong acid.

The invention relates to a water-based polyvinylidene chloride rust-to-rust resin coating and a preparation method thereof, and belongs to the technical field of anticorrosive coatings. The coating is composed of a bottom coating and a surface coating, and both the bottom coating and the surface coating take a water-based polyvinylidene chloride resin emulsion from the same source as a film-forming binder. A stabilizer ethylene diamine tetraacetic acid salt is added in advance in the polymerization process of the water-based polyvinylidene chloride resin emulsion; tannic acid is particularly added into the primer as a rust conversion agent. The preparation method of the coating comprises the following steps: respectively preparing a primer slurry containing tannic acid and an anti-rust pigment and a finish slurry containing a finish pigment filler, respectively mixing the primer slurry and the finish slurry with the water-based polyvinylidene chloride resin emulsion, and filtering to obtain the coating. Through the synergistic effect of the stabilizer and the tannic acid, the obtained coating system has excellent storage stability, physical and mechanical properties and excellent anti-rust and anti-corrosion properties.

The invention relates to the technical field of functional polymer materials, and particularly discloses an efficient sensible heat exchange membrane and a preparation method and application thereof. The high-efficiency sensible heat exchange membrane provided by the invention comprises the following components in parts by weight: 70-85 parts of a polymer matrix, 15-30 parts of a heat-conducting moisture-resistant filler and 1-5 parts of an interface compatilizer, the heat-conducting moisture-resistant filler is a mixture of boron nitride, fluorinated graphene, hydroxylated graphene and molybdenum disulfide in a weight ratio of 3: (1-2): (1-2): (0.5-1); the polymer matrix is selected from one or more of polyethylene glycol terephthalate, polyvinyl alcohol, an ethylene-vinyl alcohol copolymer and polyvinylidene chloride; the invention further provides a preparation method of the efficient sensible heat exchange membrane. The high-efficiency sensible heat exchange membrane provided by the invention has high thermal conductivity and extremely low water vapor permeability, and can completely meet the use requirements of a high-efficiency sensible heat exchange device on a membrane material.

Method for making a carbon molecular sieves described herein may include applying an adhesive to exterior surfaces of polymeric hollow fibers at a first end of a plurality of polymeric hollow fibers, wherein the polymeric hollow fibers include polyimide, polyvinylidene chloride, or a combination thereof, and wherein the adhesive includes at least 75 wt. % polyimide, polyvinylidene chloride, or a combination thereof, based on the total weight of the adhesive; curing the adhesive on the exterior surfaces of the polymeric hollow fibers to form a carbon molecular sieve precursor; and pyrolyzing the carbon molecular sieve precursor to form a carbon molecular sieve, wherein the carbon molecular sieve includes a plurality of carbon hollow fibers and a carbonaceous adhesive residue on a first end of the plurality of carbon fibers.

The invention discloses a stacking plastic bucket with high sealing performance and a preparation method thereof, and belongs to the technical field of high polymer materials, the preparation method comprises the following steps: adding a compatilizer into an alpha-olefin ethylene copolymer, mixing, adding polyvinylidene chloride powder, nano montmorillonite and talcum powder, and mixing to obtain a mixture; mixing dicumyl peroxide and triallyl isocyanurate, and spraying the mixture to the surface of the mixture for mixing; adding the pigment and the composite antioxidant; extruding to obtain a barrel blank master batch; performing injection cooling to obtain a barrel blank; and dipping and draining. The binding performance of the alpha-olefin ethylene copolymer, polyvinylidene chloride and other raw materials is optimized by preparing the compatilizer, the binding tightness between the raw materials is greatly improved, medium permeation channels are effectively reduced, a uniform and compact sealing layer is formed on the barrel opening in cooperation with the two-stage impregnation process and the compound emulsifier, meanwhile, the barrel cover is made of differentiated raw material proportions, and the service life of the barrel cover is prolonged. And the overall sealing performance and the medium infiltration resistance of the plastic barrel are cooperatively improved.

This invention belongs to the field of polymer materials technology, specifically relating to polyethylene rotational molding resin powder for high-pressure hydrogen storage cylinder linings and its preparation method. The polyethylene rotational molding resin powder for high-pressure hydrogen storage cylinder linings of this invention is composed of the following raw materials: polyethylene, POE, polyvinylidene chloride, antioxidant, acid scavenger, lubricant, and modified boron nitride; the polyethylene rotational molding resin powder has a melt flow rate of 4.8–5.7 g / 10 min and a density of 0.932–0.938 g / cm³. 3 The bulk density is 0.39–0.45 g / cm³. 3 The flow time is 18–23 s / 100g, the particle size distribution is 40–60 mesh with 50%–65% of the particles, and the hydrogen permeability coefficient is 0.65–0.85 mol·m / (m 2 ·s·Pa)×10 ‑15 It has high bulk density, short dry flow time, reasonable particle size distribution, and low hydrogen permeability coefficient.

The application relates to a photovoltaic module and a preparation method thereof. The photovoltaic module comprises a packaging panel, a first packaging adhesive film, a cell piece, a second packaging adhesive film and a packaging back plate which are arranged in a stack; the photovoltaic module further comprises a first barrier layer and / or a second barrier layer; the first barrier layer is arranged between the packaging panel and the first packaging adhesive film; and the second barrier layer is arranged between the second packaging adhesive film and the packaging back plate. The barrier layer comprises a polymer matrix and barrier-enhancing particles; the polymer matrix is selected from at least one of polyvinylidene fluoride, polytetrafluoroethylene and polyvinylidene chloride; and the barrier-enhancing particles are selected from at least one of nano-aluminum oxide, nano-titanium dioxide and nano-silicon dioxide. By arranging the barrier layer, the photovoltaic module has good salt mist corrosion resistance.

Composition for the production of a barrier layer, comprising a polymer component, surface-modified inorganic particles in the form of metal particles, which are corrosion-passivated nanoscale platelet-shaped aluminum particles, and a proportion of an organic solvent. wherein the particles are modified on their surface with one or more double bond functionally reactive silane components and with one or more amino functional components, wherein the amino functional component(s) is / are selected from a multifunctional low molecular weight aliphatic, aromatic, heterocyclic component, amino functional polyether components and mixtures thereof; wherein the particles have a nanoscale platelet thickness; and wherein the polymer component is selected from polyacrylates, polyvinylidene chlorides, polyurethanes, polyesters and cellulose derivatives.

The application relates to the technical field of composite films, and discloses a composite film, a preparation method of the composite film and a packaging material, the composite film is a composite film with a multilayer structure, and comprises an ultraviolet-resistant layer, a filling layer, a bonding layer and a high-barrier antibacterial layer; the ultraviolet-resistant layer adopts polyethylene and / or polypropylene as raw materials and a composite ultraviolet-resistant agent; the high-barrier antibacterial layer adopts a composite antibacterial agent and a barrier resin as raw materials; and the barrier resin is ethylene-vinyl alcohol copolymer and / or polyvinylidene chloride. The packaging material film prepared by adopting the composite film is soft, and has the properties of ultraviolet aging resistance and antibacterial performance.

A laminate carbon molecular sieve (CMS) membrane may comprise a microcapillary laminate comprising: two or more microcapillary films, each microcapillary film comprising a first lengthwise face, a second lengthwise face, a first widthwise face, and a second widthwise face; one or more widthwise spacers; and two or more lengthwise spacers, wherein: the one or more widthwise spacers and the two or more lengthwise spacers are interposed between each of the two or more microcapillary films, at least one widthwise spacer is positioned proximal to the first widthwise face of the two or more microcapillary films; at least one lengthwise spacer is positioned proximal to the first lengthwise face of the two or more microcapillary films; at least one lengthwise spacer is positioned proximal to the second lengthwise face of the two or more microcapillary films, and the two or more microcapillary films comprise a polyvinylidene chloride (PVDC) copolymer.

The food preservation bag for household refrigerator is used for burning incense to supplement oxygen and carbon dioxide, belongs to the field of food preservation technology, is composed of a preservation bag body (1), an incense burner (2), an incense igniter (3), a self-sealing strip (4), a power cord (12), incense grains (13), an incense igniter head (16), an incense igniter knob (25) and a preservation bag bottom (36), characterized in that the material of the plastic film used in the preservation bag body (1) is polyethylene, polypropylene, polyvinyl chloride or polyvinylidene chloride, a self-sealing strip (4) is arranged on the bag opening (5), the incense burner (2) and the incense igniter (3) are arranged in the preservation bag body (1), the outer end of the incense igniter (3) is called the incense igniter knob (25), the inner end of the incense igniter (3) is called the incense igniter head (16), and the incense igniter knob (25) and the incense igniter head (16) are connected together through the power cord (12). The present application is simple in manufacture, high in operability, low in cost and obvious in effect.

The invention discloses a polycarbonate material and a preparation method thereof. The polycarbonate material is prepared from the following components in parts by mass: 100 parts of polycarbonate, 30 to 50 parts of silicon copolymerized polycarbonate, 3 to 10 parts of brominated polycarbonate, 30 to 50 parts of polysulfone, 2 to 10 parts of polyvinylidene chloride, 10 to 20 parts of polyarylate fiber, 1 to 5 parts of wollastonite, 1 to 5 parts of zinc stannate compound, 0.3 to 1 part of ferrocene and 0.3 to 1 part of phosphorus flame retardant. By adding the polyarylester fiber to form a reinforcing system, on one hand, the characteristics of low smoke density and low heat release of polyarylester are utilized, and on the other hand, the polyarylester is added in a fiber form, so that the problems of large processing temperature difference and poor compatibility of the two materials are solved, and meanwhile, the heat resistance and multi-axis impact resistance of the material are more excellent; the obtained polycarbonate is low in smoke density and low in heat release in the combustion process, and is particularly suitable for being applied to the fields of aviation and railways.

The invention relates to the technical field of lithium batteries, in particular to a preparation method and application of a temperature-driven phase-change self-locking hole nanofiber solid electrolyte. According to the solid electrolyte, a self-made phase change polymer material and a polyvinylidene chloride-hexafluoropropylene copolymer are blended, and the nanofiber solid electrolyte with a flexible three-dimensional network structure is prepared by an electrostatic spinning technology. According to the preparation method and application of the temperature-driven phase-change self-locking hole nanofiber solid electrolyte, the preparation mode is simple, the adjustable range is wide, and the prepared solid electrolyte has high ionic conductivity, low bulk impedance and wide working voltage; meanwhile, when the lithium dendrites pierce the electrolyte to induce heat release, the phase change material is triggered to be converted from a solid state to a viscous state, micropores and nanofiber three-dimensional through holes formed by the lithium dendrites are spontaneously locked, positive and negative electrode contact is isolated, thermal runaway is interrupted, and the safety of the battery is improved.

This invention relates to a composite coating with both rust conversion and active corrosion protection functions, its preparation method, and its application, belonging to the field of coating corrosion protection technology. The composite coating with both rust conversion and active corrosion protection functions comprises the following components by mass percentage: 0.1%~0.35% corrosion inhibitor, 2.5%~4% tannic acid, 15%~25% phosphoric acid, 0.5%~2% Texanol, 1%~5% diethylene glycol monomethyl ether, 0.1%~0.3% wetting agent, and the balance being a copolymer emulsion of polyvinylidene chloride and acrylic acid; wherein the corrosion inhibitor is Ti3C2T x MXene is a composite corrosion inhibitor obtained by intercalating L-histidine after modification with a silane coupling agent. This composite coating has three functions: rust conversion, barrier protection, and active corrosion prevention, and avoids the problem of excessive corrosion of the substrate by rust conversion agents, eliminating the need for additional coatings.

The invention discloses easily-degradable lining composite paper with high barrier performance. The easily-degradable lining composite paper comprises a paper base layer, and a bonding layer, a reinforcing layer, a barrier layer and a functional coating are sequentially arranged on the inner side of the paper base layer; the adhesive layer is formed by coating a biological adhesive; the reinforcing layer is a PLA film, the barrier layer is formed by coating and curing a barrier coating, and the barrier coating comprises lignin, cationic starch, chitosan, zeolite powder, kaolin, a citric acid solution, polyvinylidene chloride, an acrylonitrile copolymer, a hexafluoroisopropanol solution and polylactic acid. The functional coating is formed by coating and curing a functional coating, and the functional coating comprises a water-based acrylic acid mixed solution, a silicon dioxide mixed solution, epoxy polylactic acid, triethylamine and chitosan. The composite paper produced by the invention not only has the advantages of reasonable structural layout, remarkable barrier property and high wear resistance, but also has relatively high tensile strength.

The application discloses a shrink film and a preparation method thereof, and relates to the technical field of shrink films. The shrink film comprises a plurality of first polyethylene layers, a first ethylene / vinyl acetate layer arranged on the polyethylene layer, a polyvinylidene chloride layer arranged on the first ethylene / vinyl acetate layer away from the polyethylene layer, a second ethylene / vinyl acetate layer arranged on the polyvinylidene chloride layer away from the first ethylene / vinyl acetate layer, and a mixed functional layer arranged on the second ethylene / vinyl acetate layer away from the polyvinylidene chloride layer. The application solves the problem that the blue compensation scheme in the prior art is mostly added by manual experience, cannot be dynamically adjusted in real time according to the color change of the film body, is prone to cause local color difference, transparency fluctuation and haze increase, and is difficult to meet the requirements of high-end transparent packaging on color consistency and optical stability.