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25results about How to "Prevent fading" patented technology

Environment-friendly composite plastic-wood plate and preparation method thereof

ActiveCN119570279Asolve easy reuniongood compatibilityFiberAdipic acid
The invention relates to the technical field of composite plastic wood, and discloses an environment-friendly composite plastic wood plate and a preparation method thereof.The environment-friendly composite plastic wood plate is prepared from bamboo powder, poly (butylene adipate-co-terephthalate), polylactic acid, a compatilizer, filler, a lubricant, functional fibers and a composite additive, the functional fibers are added, so that the prepared environment-friendly plastic-wood plate has excellent mechanical properties and antibacterial properties, and the situation that the composite plastic-wood plate is eroded by bacteria and molds, and the appearance and the performance of the composite plastic-wood plate are affected badly can be avoided; by adding the composite additive, the prepared environment-friendly plastic-wood plate has excellent impact resistance and ultraviolet resistance, energy can be better absorbed and dispersed when the environment-friendly plastic-wood plate is impacted by external force, and the situation that the service life of the composite plastic-wood plate is shortened due to ultraviolet irradiation in the long-term use process is avoided.
Owner:HUIDONG MEIXIN PLASTIC LUMBER PROD MFG CO LTD

High-color-fixation medium-temperature hole sealing agent for aluminum alloy anode oxide film and preparation method and application of high-color-fixation medium-temperature hole sealing agent

The invention belongs to the technical field of hole sealing reagents, and discloses a high-color-fixation medium-temperature hole sealing agent for an aluminum alloy anodic oxide film as well as a preparation method and application of the high-color-fixation medium-temperature hole sealing agent. The medium-temperature hole sealing agent comprises hole sealing main salt, hole sealing auxiliary salt, a color fixing auxiliary agent and an auxiliary agent, the hole sealing main salt comprises nickel acetate or nickel acetate hydrate; the hole sealing secondary salt comprises at least one of cobalt acetate, magnesium acetate, lithium acetate and calcium acetate; the color fixing auxiliary agent comprises at least one of tannic acid, gallic acid, quercetin, ellagic acid, tannic acid and catechin. According to the medium-temperature hole sealing agent, hole sealing of the aluminum alloy oxidation film is achieved under the medium-temperature (55-65 DEG C) condition, meanwhile, the color fixing process of dye molecules in micropores of the oxidation film is synchronously completed through the effect of the specific color fixing auxiliary, and the problems of uneven hole sealing and color fading caused by a separation technology are solved. And after the hole sealing agent is used for treatment, the binding force of the dye and an oxidation film can be enhanced, and the dye is not easy to fade in a high-temperature and high-humidity environment for a long time.
Owner:FOSHAN HAIHUA SURFACE TREATMENT TECH CO LTD

High-temperature-resistant anti-falling anti-counterfeit label

The utility model discloses a high-temperature-resistant anti-drop anti-counterfeit label, which comprises backing paper, an anti-counterfeit label body, a protective layer, a first heat-resistant layer, a first sticking area and a second sticking area, the anti-counterfeit label body is stuck on the backing paper, a wear-resistant layer and the protective layer are arranged on one side of the anti-counterfeit label body, and the protective layer is arranged on the other side of the anti-counterfeit label body. And a first sticking area and a second sticking area are arranged on the bottom surface of the second heat-resistant layer. Through the arrangement of the first heat insulation layer, the heat dissipation layer and the second heat insulation layer, the influence of external high temperature on electronic elements in the label can be effectively reduced through the arrangement of the two heat insulation layers, the electronic elements are prevented from being damaged or losing efficacy due to overheating, heat generated in the label can be rapidly dissipated out through the heat dissipation layer, and the heat dissipation effect is good. The heat is prevented from being accumulated in the label, so that the anti-counterfeit label can better resist the behavior that a counterfeiter destroys or tampers the anti-counterfeit information by means of high temperature and the like, the safety and the reliability of the anti-counterfeit label are effectively improved, and the anti-counterfeit effect is improved.
Owner:JIANGSU SIMINO PACKAGING TECH CO LTD

Thermal transfer printing receiving sheet capable of transferring high-color-concentration image and preparation method thereof

The invention relates to a thermal transfer receiving sheet capable of transferring a high-color-concentration image and a preparation method of the thermal transfer receiving sheet, and relates to the technical field of thermal transfer. The heat transfer printing receiving sheet comprises a receiving layer, and the receiving layer is prepared from the following raw materials in parts by weight: 30 to 60 parts of vinyl chloride-vinyl acetate resin, 3 to 10 parts of polyvinyl butyral resin, 0.1 to 5 parts of poly-alpha olefin and 0.1 to 1 part of release agent. According to the heat transfer printing receiving sheet formed by the raw materials of the receiving layer, the color saturation of an image on the heat transfer printing receiving sheet can be obviously improved, the heat transfer printing receiving sheet has high demolding performance, and the problems of adhesion, fading and other transfer printing defects occurring in transfer printing are solved.
Owner:HUNAN DINGYIYUAN TECH DEV CO LTD +1

Equipment for weaving multicolor low-cut high-loop carpet by multiple strands of yarns

The invention discloses equipment for weaving a multicolor low-cut high-loop carpet by using multiple strands of yarns, and a manufacturing process of the equipment for weaving the multicolor low-cut high-loop carpet by using the multiple strands of yarns comprises the following steps: step 1, selecting the multiple strands of yarns as basic yarns, and enabling the multiple strands of yarns to consist of a plurality of filaments; 2, dyeing the multi-strand yarn through a multi-color dyeing process; 3, weaving the dyed multi-strand yarns into a main body fabric of the carpet through a weaving machine according to a preset weaving mode; 4, the woven carpet is subjected to low cutting treatment, and the cutting height is controlled within the range of 3-5 mm so that the comfort level and the appearance effect of the carpet can be enhanced; according to the production process for the multi-color low-cut high-loop carpet woven by the multi-strand yarn, through the steps of optimized dyeing, low-cut high-loop weaving, anti-fouling and anti-aging treatment and the like, a high-quality, multifunctional and environment-friendly carpet product is achieved, multiple problems in the prior art are solved, and the production process is suitable for large-scale popularization and application. And the aesthetic degree, the comfort and the durability of the carpet are obviously improved.
Owner:SHANXI CHANGZHI YARUI CARPET CO LTD

Recycled degradable environment-friendly ink-absorbing needle-punched nonwoven fabric

This utility model provides a recyclable, biodegradable, and environmentally friendly ink-absorbing needle-punched nonwoven fabric, relating to the field of nonwoven fabric technology. It includes: a nonwoven fabric body; the nonwoven fabric body has a three-layer composite structure, with an upper dense surface layer and a lower dense surface layer, and a middle loose support skeleton. Both the upper and lower dense surface layers are composed of fibers with a diameter of 2 micrometers. A nanofiber cellulose film with a thickness of 8 micrometers is laminated to the surface of the nonwoven fabric body. The nonwoven fabric body has a three-layer composite structure, with upper and lower polylactic acid dense layers (2 micrometers in diameter, each accounting for 20% of the total thickness) controlling ink diffusion and improving strength, and a middle loose support skeleton (6 micrometers in diameter, accounting for 60%, with a porosity of 75%) storing and penetrating ink. The three-dimensional structure is formed by needle punching at 200 needles / cm². The film contains 3% titanium dioxide for UV resistance. Both polylactic acid and nanofiber cellulose are biodegradable materials, suitable for printing, medical, and packaging fields, balancing environmental friendliness, printing performance, and functionality.
Owner:GUANGDONG ZHICHENG NONWOVEN TECHNOLOGY CO LTD

Acrylic flash point structure plate

The utility model relates to acrylic plate technical field especially relates to acrylic flash point structural board, include: board body, the inside of board body is equipped with the accommodating groove of one end is open, and the side wall department of board body is equipped with two positioning holes close to the opening, and two positioning holes all in -line are equipped with the magnetic block of embedding, the bale, the bale is bonded and is pasted in the outer wall of board body, the pattern board, the pattern board is inserted in the accommodating groove and is consistent with the size of accommodating groove, the seal, both ends of seal are all solid and are equipped with the magnetic column, and the magnetic column is inserted in the positioning hole and is connected with the magnetic block magnetic suction, this acrylic flash point structural board can realize the replacement of different patterns and can improve the protectivity of acrylic plate, and can make the light source of side surface luminous homogenization, make the whole pattern display effect better, clearer, and have the flash silver effect, can improve the ornamental value, can strengthen the ultraviolet resistance ability simultaneously, prevent the board material aging, discoloration, improve the wear resistance and self -cleaning.
Owner:ZHAOMING NEW MATERIAL TECHNOLOGY (ZHONGSHAN) CO LTD

A printing mold for LED bowls and cups

ActiveCN111161645Bavoid contactControl printing thicknessLiquid surface applicatorsCoatings
The present invention discloses an LED bowl cup and a printing mold for improving screen brightness and contrast, and belongs to the field of LED display technology; the purpose is to improve the contrast and brightness index of the display screen through the structure of a small-sized LED bowl cup and the quality of printing ink; the bowl cup is formed by injection molding of a dark plastic material, and the bowl cup includes a conical cup body, a vertical cylindrical cup bottom and a cup mouth protruding from the cup body, and the cup mouth and the cup body form a stepped structure; a light-colored coating is arranged on the inner side of the cup body; the lower mold of the printing mold includes a plurality of printing convex heads arranged on a base, and a printing depth positioning step protruding from the printing convex head is arranged at the connection between the printing convex head and the base, and the structure of the printing convex head is adapted to the LED bowl cup, and the height of the printing depth positioning step is equal to the height of the cup mouth; the bowl cup and the mold with this structure can effectively control the coating thickness and coating coverage, improve the printing quality, and further improve the contrast and brightness index of the display screen.
Owner:SHANXI HIGH TECH HUAXING ELECTRONIC TECH CO LTD

Window frame corner structure with hollow built-in blinds

This utility model discloses a corner joint structure for a window frame with insulated built-in blinds, relating to the field of insulated built-in blinds technology. It includes a window frame body with a corner protection mechanism on one side. This utility model, through the corner protection mechanism, facilitates the splicing and installation of the window frame corners while protecting workers. The two window frame bodies are spliced ​​and installed through the cooperation of the mounting block and mounting groove, and the cooperation of the threaded hole and bolt. The corner protector prevents the spliced ​​window frame corners from being sharp or pointed, avoiding the cumbersome process of splicing the corners, which often requires professional personnel or a long time. This ensures the ease of installation and avoids the risk of injury to workers' hands or feet due to the sharp corners of traditional window frames, thus guaranteeing the safety and reliability of the structure.
Owner:XUZHOU HENGXIN GLASS CO LTD

Color protection processing method for compound fruit and vegetable beverage

The invention relates to a color protection processing method for a compound fruit and vegetable beverage, and belongs to the technical field of beverage processing, and the color protection processing method comprises the following steps: S1, preparing fruit and vegetable raw materials including blackcurrant, mulberry, apple, cherry and celery, and cleaning the fruits and vegetables; s2, slicing apples, cherries and celery, then adding water and a color fixative into all the raw materials, pulping together, and then carrying out enzymolysis and enzyme deactivation treatment; and S3, filtering the pulp subjected to enzyme deactivation, adding auxiliary materials, homogenizing, degassing and sterilizing to obtain the compound fruit and vegetable beverage. According to the processing method disclosed by the invention, pigment of fruits and vegetables can be protected, loss, oxidation, fading and the like of the pigment are avoided, the color of the final product is amaranth, and the obtained compound fruit and vegetable beverage is good in taste and rich in nutrition.
Owner:SHIHEZI DEV ZONE SHENNEI FOOD

Washable cotton fabric

The utility model discloses a washable cotton fabric, which relates to the technical field of cotton fabric, and comprises a fabric roller, a fabric mechanism is arranged on the outer surface of the fabric roller, the fabric mechanism comprises a fabric body, the fabric body is sleeved outside the fabric roller, a pure cotton layer is arranged above the fabric body, a springback layer is arranged above the pure cotton layer, and the springback layer is arranged above the pure cotton layer. A springback layer is arranged above the fabric body, a washable layer is arranged above the springback layer, a reflecting layer is arranged above the washable layer, springback columns which are arranged at equal intervals are fixedly mounted on the inner wall of the fabric body, connecting grooves which are arranged at equal intervals are formed in the bottom surface of the reflecting layer, and the top end of each springback column is clamped in the corresponding connecting groove. Through the arrangement of the fabric body, the rebound layer and the washable layer, the phenomenon that the fabric deforms when being subjected to transverse tension in the cleaning process is avoided as much as possible, through the arrangement of the reflecting layer, the phenomena of color fading and discoloring of the fabric are avoided as much as possible, and then the service life of the fabric is prolonged.
Owner:NANTONG HENGQI TEXTILE CO LTD

A method for dyeing with vat dyes in an overflow dyeing machine

PendingCN122082268Aeasy reunionEvenly dyedDyeing processFiberLightfastness
This invention provides a method for dyeing with vat dyes in an overflow dyeing machine. The use of a dye premix significantly improves dyeing performance. The cationic properties of modified cationic starch electrostatically adsorb onto fabric fibers, allowing the coated dye particles to quickly and evenly adhere to the fabric surface. This avoids localized color differences caused by uneven dye dispersion in the dye bath, and the water flow impact in overflow dyeing prevents localized dye aggregation, effectively improving dyeing uniformity and ensuring consistent dyeing results for the same batch of fabrics. The stable structure formed by the cross-linking of modified cationic starch and vat dye forms a protective film on the fabric fiber surface after color fixation, enhancing the binding stability between the dye and fiber, reducing damage to dye molecules from external factors such as light, improving the dye's lightfastness and the fabric's sunlight fastness. Its film-forming properties also make the dye and fiber bond more firmly, preventing fading.
Owner:ZIBO XINGWEI SUPPLY CHAIN MANAGEMENT CO LTD

Anti-aging power cable

The invention discloses an anti-aging power cable, and belongs to the technical field of power cables. The cable sequentially comprises a conductor, an insulating layer, a metal shielding layer and an outer sheath layer from inside to outside. Wherein the outer sheath layer is made of a POE composite material and comprises the following raw materials in parts by weight: 65-75 parts of POE, 15-20 parts of high-density polyethylene, 10-15 parts of a flame retardant, 4-6 parts of chopped aramid fibers, 1-2 parts of an anti-aging auxiliary agent, 2-4 parts of a light protection auxiliary agent and 0.5-1.5 parts of a processing auxiliary agent. Wherein the light protection auxiliary agent has the effects of widening the ultraviolet absorption range and enhancing the mechanical property. The prepared cable has excellent bending resistance, dragging resistance, rolling resistance, ultraviolet aging resistance and thermo-oxidative aging resistance, and is especially suitable for mobile electrical connection occasions such as charging piles, the service life of the cable is remarkably prolonged, and the safety and reliability of the cable are remarkably improved.
Owner:ANHUI MENTOR CABLE GROUP

Data center cable intelligent identification quick-mounting cable management rack

ActiveCN224418352USolve identificationSolve the problem of actual discrepancySoftware engineeringCable management
The utility model belongs to the field of wire arranging frame, especially intelligent identification quick -wiring wire arranging frame of data center. The utility model provides intelligent identification quick -wiring wire arranging frame of data center, include: a plurality of wire arranging blocks, each wire arranging block is mutually spliced and constitutes wire arranging frame through connecting component, the wire arranging block includes bottom piece and top piece, the bottom piece and top piece opposite one end respectively has set up the clamping groove for accommodating cable, between top piece and bottom piece is connected through fixed component, RFID label, RFID label sets up in the top of top piece, and is readable and writeable type label, after RFID label is activated through the cooperation of reader -writer and electromagnetic wave, can read and rewrite its storage content, through the RFID label of readable and writable, replace traditional paper or plastic label, avoided the problem that label faded and fell off because of dust, vibration, while RFID label can directly update information through the reader -writer, need not manual re -label, solved the problem that the cable adjustment is not in conformity with actual after identification.
Owner:ANHUI WANYUAN INFORMATION TECH CO LTD

Sakura color fixing and drying method

PendingCN119563699Aprevent fadingprevent discolorationFood ingredient functionsFood dryingUltrasound techniquesProcess engineering
The invention belongs to the technical field of agricultural product processing, and particularly relates to an oriental cherry color fixing and drying method. The preparation method comprises the following steps: selecting, cleaning and draining fresh oriental cherry to obtain an oriental cherry raw material; the method comprises the following steps: soaking a sakura raw material in a color-protecting solution, performing ultrasonic treatment, and soaking in the color-protecting solution in combination with a pulse vacuum technology; and finally, stopping drying when the water content of the oriental cherry dry basis is reduced to 5% by utilizing a microwave vacuum drying technology, so as to obtain the dried oriental cherry product. According to the method, the self-developed special color protecting liquid for the dried oriental cherry products is adopted, the ultrasonic technology and the pulse vacuum impregnation technology are combined, and the dried oriental cherries which are pink and gorgeous in color are obtained through the microwave vacuum drying technology; the organic combination of the four factors avoids the color deterioration of the oriental cherry caused by a conventional drying method, provides a new method for industrial high-quality production of dried oriental cherry products, and has a wide application prospect.
Owner:ZHEJIANG WANLI UNIV

Ultrafine crepe fabric

The utility model relates to the technical field of cloth accessory devices, in particular to a superfine crepe satin fabric which is good in dyeing property and durability and capable of improving the quality of mulberry silk, so that the experience of consumers is improved, and the practicability is enhanced. Comprising a crepe fabric body, the crepe fabric body comprises a real silk satin surface layer, a reinforced satin surface layer and a dyed satin surface layer, the top of the real silk satin surface layer is covered with the reinforced satin surface layer, and the top of the reinforced satin surface layer is covered with the dyed satin surface layer. The real silk satin surface layer, the reinforced satin surface layer and the dyed satin surface layer are respectively knitted and combined together through mulberry silk.
Owner:HUZHOU XINYU SILK WEAVING CO LTD

Non-fading fish raft floating ball and connecting structure thereof

The invention relates to the technical field of marine equipment, in particular to a fadeless fish raft floating ball and a connecting structure thereof.The fadeless fish raft floating ball comprises a hollow main body, the main body is rotationally connected with a connecting shaft in a penetrating mode through a bearing, and the end, located outside the main body, of the connecting shaft is fixedly connected with a floating ball; a rotating mechanism is arranged in the main body, the rotating mechanism comprises a sliding plate, the sliding plate is slidably connected in the main body in a sealed mode, and the sliding plate is fixedly connected with a rack in a penetrating mode; an air pumping mechanism is arranged in the main body, the air pumping mechanism comprises a main sliding sleeve, the main sliding sleeve is fixedly connected with the bottom wall of the main body in a penetrating mode, the main sliding sleeve is in sealed sliding connection with a main pump column, and the end, located outside the main sliding sleeve, of the main pump column is fixedly connected with a floating block; a coating mechanism is arranged at the position of the main body and comprises an auxiliary sliding sleeve. The floating ball has the advantages that the floating ball can be effectively prevented from fading, and meanwhile the connecting structure of the floating ball is more convenient and more stable to mount.
Owner:福建新胜达新材料科技有限公司

Impact-resistant and strong-shock-resistant signboard

ActiveCN224082134UReduce direct damageavoid surface abrasionNon-rotating vibration suppressionSignsClassical mechanicsMechanical engineering
The utility model discloses an impact-resistant strong anti-seismic signboard which comprises a signboard body, a supporting rod is arranged on the outer side of the signboard body, the supporting rod is connected with an elastic buffering assembly through a sliding ring, the upper end of the elastic buffering assembly is connected with a lateral buffering assembly, and a damping buffering assembly is arranged in the middle of the elastic buffering assembly in a sleeved mode. The elastic buffering assembly comprises an outer side arc-shaped buffering plate and an inner side arc-shaped buffering plate. According to the signboard, the outer side arc-shaped buffering plate and the inner side arc-shaped buffering plate are adopted, through double-layer protection, when the signboard is impacted, the buffering effect can be achieved, direct damage of external force to the signboard is reduced, surface abrasion, color fading or deformation of the signboard is prevented, and the service life of the signboard is prolonged; and pressure caused by lateral collision can be further buffered, damage to the signboard due to collision can be effectively reduced, and the signboard is further protected.
Owner:CANGZHOU ANBAI ELECTRIC POWER EQUIP CO LTD

Thermal shrinkage label with positioning metal pattern

ActiveCN224203773Ueasy to identifyIncrease the difficulty of anti-counterfeitingStampsIdentification meansEngineeringProtection layer
The utility model discloses a thermal shrinkage label with a positioning metal pattern, which relates to the technical field of labels and comprises an intelligent identification layer. An anti-sticking release layer, a thermosensitive shrinkage base material, a highlight metal special effect layer, an information printing layer, an ultraviolet refraction layer, an ultraviolet blocking layer and a wear-resistant protection layer are sequentially arranged on the top side of the intelligent identification layer from bottom to top, the intelligent identification layer is arranged at the lowest position, and the anti-sticking release layer is arranged on the top side of the intelligent identification layer. The anti-counterfeiting label has the advantages that the intelligent identification layer is made of fragile materials, once the label is tried to be peeled off or damaged, the intelligent identification layer is irreversibly damaged, so that bad merchants are effectively prevented from counterfeiting products of other brands by replacing the label, the highlight metal special effect layer is combined with the information printing layer, and the anti-counterfeiting effect is good. A unique metal pattern is formed, and the pattern is difficult to copy, so that the anti-counterfeiting difficulty is increased, and counterfeit and shoddy products are easier to identify.
Owner:ANHUI CHENGDE PACKAGING CO LTD

Production method of raw salt field shrimps and product thereof

The invention belongs to the technical field of food processing, and provides a production method of raw salt field shrimps and a product thereof. The soaking solution contains the green tea extracting solution, so that the fishy smell can be effectively removed, the uncooked shrimps can be bright and glossy, the shelf life of the product is prolonged, and fading and blackening of the product are avoided. The method provided by the invention is simple in process, short in production cycle and low in energy consumption, and the processed product has the taste similar to that before freezing after being unfrozen, and is crisp and elastic in taste after being unfrozen, rich in shrimp flavor and free of fishy smell. The product is free of preservatives, has various indexes meeting the standards of uncooked food products, and is safe, reliable, green and healthy.
Owner:SHANDONG MEIJIA GROUP +1

Colorful fluorescent corrosion-resistant gold and silver wire and preparation method thereof

According to the scheme, the fluorescent powder, the disperse dye, the dispersing agent, the anti-settling agent and the resin are mixed according to the set proportion to obtain the prepared colored fluorescent coating slurry, the mechanically-cut metallic yarn is wound on the surface of a yarn drum of a cheese dyeing machine, the colored fluorescent coating slurry is added into a slurry storage tank, and the colored fluorescent coating slurry is sprayed on the surface of the yarn drum of the cheese dyeing machine. The colored fluorescent coating slurry is controlled to be sprayed out from the pores of the spool under set spraying conditions so as to wrap the mechanically cut metallic yarn, so that a metallic yarn monofilament wrapped by the colored fluorescent coating slurry is obtained, and the metallic yarn monofilament is sequentially pre-dried by an infrared pre-drying device and dried by a hot air drying device, so that the metallic yarn monofilament is obtained. The colored fluorescent corrosion-resistant metallic yarn realizes coating protection and fluorescent coating finishing of a metallic yarn section, has good corrosion resistance and excellent night gloss, and can be used for decoration of textiles such as curtains, wall cloth and clothes.
Owner:ZHEJIANG SCI-TECH UNIV +1

Preparation method of colored mortar coating for pervious concrete base surface

The invention discloses a preparation method of a colored mortar coating for a permeable concrete base surface, which comprises the following steps: (1) uniformly mixing red mud powder and / or red brick micro powder, waste glass powder and nano silicon dioxide, then sintering to melt the glass powder, then cooling to room temperature, crushing and screening to obtain modified pigment fine aggregate; (2) adding sepiolite particles into a tetraethoxysilane-absolute ethyl alcohol mixed solution, performing ultrasonic treatment, separating out the sepiolite, and drying to obtain pretreated sepiolite; and soaking the sepiolite in water until the sepiolite is saturated, and then carrying out solid-liquid separation to obtain the modified sepiolite. And (3) uniformly mixing Portland cement, fine aggregate, the modified pigment fine aggregate, the modified sepiolite, a water reducing agent and mixing water as raw materials to obtain the color mortar coating. The method provided by the invention not only effectively avoids the problem that the pigment is easy to wear and fade, but also prevents the adverse effect on the water permeability of the pervious concrete matrix.
Owner:JIANGXI PINGXIANG ARCHITECTURAL DESIGN INSTITUTE CO LTD

Polyimide material, colored polyamide acid precursor composition thereof and application of polyimide material in preparation of copolymerization type phthalocyanine colored polyimide film

PendingCN121991348Auniform performanceImprove heat stabilityImidePolymer science
The invention provides a polyimide material, a colored polyamide acid precursor composition thereof and application of the polyimide material in preparation of a copolymerization type phthalocyanine colored polyimide film. The polyimide is formed by copolymerization of hexafluorodianhydride and biphenyl tetracarboxylic dianhydride according to a specific proportion. The corresponding polyamide acid precursor composition can be dissolved in a conventional polar aprotic solvent, and has excellent solution stability and film-forming property. After thermal imidization treatment, the obtained film shows high transparency, low chromaticity deviation and uniform and controllable light-color appearance while keeping 5% thermal weight loss temperature higher than 500 DEG C, and meets the application requirements of colorless or light-color high-performance polyimide. According to the material, the problem of serious yellowing caused by charge transfer in strong molecules of traditional aromatic polyimide is remarkably solved, processing convenience and thermal mechanical performance are both considered, and the material is particularly suitable for the high-end technical fields of flexible OLED display substrates, optoelectronic device packaging, transparent high-temperature-resistant coatings and the like.
Owner:DALIAN UNIV OF TECH

Colored pearlescent silicon hydrogel contact lens and preparation method thereof

The invention provides a colored pearlescent silicon hydrogel contact lens and a preparation method thereof, and belongs to the technical field of contact lens materials. The colored pearly-luster silicon hydrogel contact lens comprises an inner film coating layer, a pearly-luster layer and a lens layer. The preparation method of the contact lens comprises the following steps: mixing raw materials of the inner covering film layer, and performing light curing to obtain the inner covering film layer; mixing raw materials of the pearly-luster layer, and performing thermocuring to obtain the pearly-luster layer; lens layer raw materials are mixed and then subjected to illumination curing to obtain a lens layer; and placing the demolded contact lens in 0.9% normal saline for replacement for 0.5-1 h to obtain the colored pearly-luster silicon hydrogel contact lens. The contact lens is high in oxygen permeation rate, constant in water content and comfortable to wear.
Owner:GANSU TIANHOU OPTICAL TECHNOLOGY CO LTD