71results about How to "Improve antistatic properties" patented technology

The invention provides a nitride light-emitting diode (LED) epitaxial wafer and a growing method thereof and relates to the technical field of semiconductor optoelectronics. The nitride LED epitaxial wafer structurally and sequentially comprises a substrate, a low-temperature buffer layer, an unintentionally doped GaN, an N-shaped electron-injection layer, an InGaN/GaN inserting layer, an active area, an electron blocking layer, a u-GaN/p-GaN superlattice and a p-GaN hole-injection layer from bottom to top. The InGaN/GaN inserting layer is grown between the N-shaped electron-injection layer and the active area so as to effective relieve stress of the active area, lower polarization electric fields, reduce limitation of stark effect through a quantum well, and improve luminance and anti-static properties. The u-GaN/p-GaN superlattice is inserted between the electron blocking layer and the P-shaped hole-injection layer so as to improve current expansion capacity and lower chip operating voltage.

The invention belongs to the field of spinning, dyeing and finishing, and particularly relates to coffee carbon multi-component fiber weaving fabric and a preparation method of the coffee carbon multi-component fiber weaving fabric. The coffee carbon multi-component fiber weaving fabric is made of the following raw materials of warp direction yarns and weft direction filaments, wherein the warp direction yarns are formed by blending the following raw materials, by weight, 25-45% of coffee carbon fibers, 25-40% of bamboo fibers, 20-30% of cationic modified polyester fibers and 0.5-0.8% of conductive fibers, and the weft direction filaments are formed by alternately ranking 150D-160D coffee carbon fiber filaments and 100D-120D PTP fiber filaments at the ratio of 1 to 1. The coffee carbon multi-component fiber weaving fabric has the advantages that different characteristics of the coffee carbon fibers and the other fibers are exerted, comfort of the apparel fabric and the uvioresistant function and other protection functions are integrated, physicochemical indexes are good, dyefastness is high, and cost performance of the fabric is high. The preparation method is provided, the process is reasonable, and a new path is opened up for improving high performance and comfort of the coffee carbon multi-component fiber weaving fabric.

The invention discloses an antistatic polypropylene composite material and a method for preparing the same and belongs to the technical field of modifying and processing polymers. The antistatic polypropylene composite material is prepared from the following raw materials in percentage by weight: 50 to 98 percent of polypropylene, 0 to 30 percent of inorganic filler, 0 to 20 percent of flexibilizer POE, 1 to 5 percent of antistatic agent, 0.1 to 1 percent of antioxidant and 0 to 1 percent of other auxiliary agents. The composite material and the method have the advantages that: 1, a proper amount of tin oxide is added in the composite material system, so that the prepared polypropylene composite material has better antistatic property; 2, under a condition of guaranteeing the antistatic property, the physical mechanical properties of the prepared polypropylene composite material are hardly affected; and 3, the method for improving the antistatic property of the polypropylene composite material is simple in preparation process and low in production cost.

The invention provides a GaN-based light emitting diode epitaxial structure. From bottom to top, the structure successively comprises a substrate, a stress control layer, an n-type GaN layer, a stress buffer layer, a multi-quantum well active layer, an interval layer, an electron blocking layer, a p-type GaN layer and an ohmic contact layer. The light emitting diode epitaxial structure also comprises a current extension layer whose forbidden bandwidth is greater than the forbidden bandwidth of the n-type GaN and which is arranged below the multi-quantum well active layer. By using the epitaxial structure, electronic leakage in an active region when a light emitting diode works under a heavy current condition can be effectively reduced, radiation recombination efficiency of a hole-electron pair can be effectively increased and an antistatic characteristic of a LED is improved.

The invention relates to a method for preparing a high-comfortable composite functional polyester fiber, comprising the steps of: first esterification reaction section, secondary esterification reaction section, polymerization reaction process and spinning process, wherein aliphatic dicarboxylic acid and/or non-centrosymmetrically aromatic dicarboxylic acid is led into the first esterification reaction section to serve as a third monomer; flexible polyethylene glycol is led into the secondary esterification reaction section to serve as a fourth monomer; after finishing the esterification reactions, hindered amine light stabilizer and hindered phenolic antioxidant which are respectively prepared by taking acetic acid and ethylene glycol as solvents and hydroxyl silicone oil are added; after finishing pre-polymerization and before final polymerization of the polymerization reaction process, ultraviolet light absorber and antistatic agent are added; and before finishing the spinning process, polyester slices are performed pre-crystallization and drying; fibers with odd-shaped cross sections of three-leaf, cross, five-leaf and the like are prepared by melt spinning. The obtained polyester fiber is anti-ultraviolet light, antistatic, anti-pilling and has wet-absorbing quick-drying performance; and the fabric has high comfort.

The invention provides an antistatic filtering cloth in the surface filtering mode for a dust collector. In a filtering cloth for a pulse blow swiping-off dust collector, the filtering cloth for the dust collector, which has numerous dust leakage after swiping off the dust, higher average outlet dust concentration, poor ventilation and dust swiping off performance and bad antistatic performance, is needed to be improved. The side of a soft material filtering surface made of fiber filtering cloth base materials such as non-woven fabric filtering cloth and the like used in the pulse blow swiping-off dust collector is laminated with a micro fine fibre layer formed by a nano carbon fiber with the conductivity, thereby the filtering cloth in the surface filtering mode for the pulse blow swiping-off dust collector, having excellent dust collecting performance and antistatic performance can be provided.

The invention provides an epitaxial growth structure in a GaN base green-light light emitting diode (LED) with P-type GaN, and relates to the technical field of growth of the P-type GaN applied in a high-brightness GaN base green-light LED. The epitaxial growth structure in the GaN base green-light LED with the P-type GaN comprises a GaN nucleating layer, an un-doped GaN layer, an n-type GaN layer, an InGaN/GaN multiple-quantum-well active layer, the P-type GaN and an InGaN current tunneling layer, wherein the GaN nucleating layer, the un-doped GaN layer, the n-type GaN layer, the InGaN/GaN multiple-quantum-well active layer, the P-type GaN and the InGaN current tunneling layer sequentially grow on a substrate. The epitaxial growth structure in the GaN base green-light LED with the P-type GaN is characterized in that the P-type GaN is composed of a low-temperature P-type GaN hole injection layer, a P-type Al(In) GaN electron barrier layer and a P-type GaN hole activation layer. The P-type GaN with the structure is applied in the growth of the high-brightness GaN base green-light LED. The brightness of a 520 nm green-light chip with the size of 20mil*40mil reaches 75mw under a 120mA current in a COW. After the epitaxial growth structure is encapsulated, external quantum efficiency reaches 31 percent and reaches the domestic leading level. Meanwhile, anti-static performance of the green-light chip with the size of 20mil*40mil is improved to over 8000V.

The invention relates to a preparation method for a polyester fiber with a composite ultraviolet, static electricity and pilling resisting function. The preparation method comprises an esterification reaction procedure, a polymerization reaction procedure and a spinning procedure. The esterification reaction procedure comprises a primary esterification reaction stage and a secondary esterification reaction stage, flexible polyethylene glycol is introduced as a third monomer in the secondary esterification reaction stage, and after esterification is finished, a hindered amine light stabilizer,a hindered phenol anti-oxidant and hydroxyl silicone oil are added, wherein the hindered amine light stabilizer and the hindered phenol anti-oxidant are prepared by taking an acetic acid and ethyleneglycol as solvents. In the polymerization reaction procedure, after prepolymerization and before final polymerization, an ultraviolet absorbent and an antistatic agent are added. Before the spinning procedure, polyester is sliced for pre-crystallization and drying. The polyester fiber obtained by the method has the outstanding ultraviolet, static electricity and pilling resisting functions, and after being woven into knitted machine-made fabrics, is tested to have related technical indexes comprising the ultraviolet light transmittance of less than or equal to 5.0%, the pilling resistance of more than or equal to level 4 and the fiber volume specific resistance of less than or equal to 10*10<10> ohm.cm.

The invention relates to a halogen-free inflaming retarding permanent antistatic polypropylene composite material and a preparation method. The halogen-free inflaming retarding permanent antistatic polypropylene composite material is manufactured by the composite materials with the following weight preparation ratio: 40%-70% of polypropylene,5%-15% antistatic agents,1%-8% compatilizer, 5%-30% fire retardant, 0.1%-0.5% antioxygen, and 0.1%-0.5% lubricant. The preparation method comprises the following steps: weighing materials based on the weight preparation ratio; putting all the materials into a high-effective mixing machine to mix for 2-5 minutes and discharging the materials; and putting the uniformly blended materials in a double screw extruder and squeezing out prilling. Compared with the prior art, the halogen-free inflaming retarding permanent antistatic polypropylene composite material has an excellent inflaming retarding feature, 1.6 millimeters inflaming retarding V0 level, and permanent anti-static electricity. The surface resistance is 1010 omega. The halogen-free inflaming retarding permanent antistatic polypropylene composite material has the advantages of being good in mechanics performance, capable of satisfying product requirements and inflaming retarding performance, greatly improving the surface resistance of the composite material, and achieving a good antistatic level.

The invention relates to an antibacterial antistatic enhanced polycarbonate (PC) material and a preparation method thereof. The antibacterial antistatic enhanced PC material comprises the following components in parts by weight: 70-90 parts of PC resin, 5-20 parts of carbon fiber, 0.5-1 part of flame retardant and 5-10 parts of antibacterial agent. The preparation method comprises the following steps: adding the PC resin, antibacterial agent and flame retardant into a mixing stirrer, mixing, adding the mixture through a main feed inlet of a double screw extruder, adding the carbon fibers through a side feed inlet of the double screw extruder, and carrying out blend melting and extrusion granulation to obtain the product. Compared with the prior art, the antibacterial agent added in the PC resin enhances the antibacterial property of the PC material; the carbon fibers are compounded to improve the electric properties of the product; and thus, the material has the advantages of high rigidity, static resistance, bacterial resistance and flame retardancy, and can be widely used in various electronic product devices.

The invention discloses a carbon nanotube/TiO2 modified UV resin coating with antistatic and antibacterial functions. The carbon nanotube/TiO2 modified UV resin coating with antistatic and antibacterial functions is formed through compounding UV resin with a photoinitiator, an active diluent and various assistants; the resin is epoxy acrylic resin; and carbon nanotubes (CNTs) with the surface being grafted with methyl methacrylate (MMA) and nano-TiO2 with the surface being hydrophobically modified are added to the UV coating. The invention also discloses a production method of the carbon nanotube/TiO2 modified UV resin coating with antistatic and antibacterial functions. The method comprises the following steps: 1, purifying the CNTs, and grafting the surface of the CNTs with the MMA; 2, hydrophobically modifying the surface of the nano-TiO2; and 3, modifying an epoxy acrylic resin coating with the CNTs with the surface being grafted with the MMA and the nano-TiO2 with the surface being hydrophobically modified. The carbon nanotube/TiO2 modified UV resin coating has good antistatic and antibacterial functions.

The invention discloses water antistatic synthetic leather and a preparation method thereof. The synthetic leather is prepared from an antistatic sizing agent by adopting a rolling process, wherein the antistatic sizing agent is prepared by following components in parts by weight: 100 parts of water polyurethane resin, 5 to 10 parts of antistatic agent, 0.5 to 1 part of antifoaming agent, 0.5 to 1 part of flatting agent, 0.5 part of organic silicon dry sliding agent and 0.3 to 0.5 part of compatilizer, and the antistatic agent is a complex consisting of a quaternary ammonium cationic surfactant and a nonionic surfactant. The synthetic leather is not only relatively good in mechanical property and capable of improving tensile strength and impact strength of the product, realizing high filling and improving the processing rheological property, but also relatively excellent in antistatic characteristic.

The invention disclose a PET (polyethylene terephthalate) antistatic release film, comprising a PET release layer, a PU (polyurethane) glue layer and a PET film face layer; the PET release layer, the PU glue layer and the PET film face layer are stacked together from bottom to top, and the PU glue layer is made from the following materials according to parts by weight: 65-80 parts of polyurethane resin, 5-8 parts of a solvent, 20-30 parts of a curing agent, 14-18 parts of an antistatic agent, 4-5 parts of a plasticizer, and 3-4 parts of an antioxidant agent. The PU glue layer prepared according to the formula of the invention has high electrostatic resistance, good antistatic feature, low peeling force, low adhesion and easiness of peeling and also has good self-gassing performance, easiness of attaching, good weatherability and zero post-peeling residue, the PET film face layer 30 is provided with holes in use, precision components are then disposed in the holes and adhered by the PU glue layer 20, and the film may be a replacement for circuit trays.

The present application relates to an adhesive composition, a protection film, an optical device, and a display device. The adhesive composition of the present application has excellent storage stability, exhibits appropriate low-rate and high-rate peeling forces after the formation of a cross-linking structure, and is excellent in terms of quantum balance. Thus, when being applied to, for example, a protection film, the adhesive composition has an excellent protective effect, can be easily peeled at the time of high-rate peeling and thus favorable in terms of a high-rate process, and can exhibit an excellent anti-static property during the process.

The invention relates to film-coated packaging paper and a preparation method thereof, in particular to a microcellular foam film-coated packaging paper material and a preparation method thereof. Thematerial is prepared from, by weight, 70-90 parts of polyvinyl alcohol, 1-10 parts of a melt reinforcing agent, 1-10 parts of a flow modifier, 1-10 parts of a foaming agent, 0.5-3 parts of an anti-adhesion agent, 1-5 parts of a foaming auxiliary agent and 0.5-2 parts of other auxiliary agents. The material is excellent in melt forming and stretching performance, small in foam hole diameter and high in cellular density, the foam film thickness can reach 20micron or below, and a product is light in weight, high in tensile strength and tear resistance and excellent in heat resistance and can be applied to the field of packaging with the requirement of high temperature of 80 DEG C or above; in addition, the product is environmentally friendly and biologically degradable; the product is excellent in oil substance barrier property; furthermore, due to high paper adhesiveness, a film surface aftertreatment process is avoided, and high productivity is realized.

The invention provides an antistatic cloth-based coated abrasive tool. The antistatic cloth-based coated abrasive tool sequentially comprises a cloth base, a primer layer, abrasive materials and a composite adhesive layer, the primer layer is adhered to the sand planting surface of the cloth base; the plurality of abrasive materials are uniformly and locally embedded into the primer layer; the composite adhesive layer is adhered to the outer sides of the abrasive materials and the primer layer; the cloth base sequentially comprises a non-sand-planting surface blade coating glue material layer, gray cloth and a sand-planting surface blade coating glue material layer; the gray cloth is impregnated with an antistatic impregnating sizing material; the non-sand-planting surface blade coating glue material layer and the sand-planting surface blade coating glue material layer are internally doped with a conductive material; conductive filler is doped in the primer layer and the composite adhesive layer; a conductive path in the abrasive tool body is formed by the non-sand-planting surface blade coating glue material layer, the impregnating sizing material in the gray cloth, the sand-planting surface blade coating glue material layer, the primer layer and the composite adhesive layer, so that the resistance value of the abrasive tool body is reduced. The invention further provides a manufacturing method. The cloth base, the primer layer and the composite adhesive layer of the abrasive tool body form the conductive path, the conductivity is improved, charges generated in the grinding process of the abrasive tool body are conducted to the ground, and the antistatic effect is achieved.

The invention relates to film packaging paper and a preparation method thereof, in particular to an easy-care micro-foam film packaging paper material and a preparation method thereof. The easy-care micro-foam film packaging paper material is made from, by weight, 80-90 parts of polyethylene, 1-10 parts of polyallyamine hydrochloride, 1-5 parts of nano oxides, 1-5 parts of an amphiphilic block copolymer, 0.5-5 parts of a foaming agent, 0.2-1 part of an anti-adhesion agent, 1-5 parts of a foaming aid, and 0.5-2 parts of other aids. The preparation method of the easy-care micro-foam film packaging paper material is also disclosed. The easy-care micro-foam film packaging paper material has the advantages of good melt forming tensile property, small foam cell diameter, high cell density, foamfilm thickness reaching 20 micrometers and below, light weight, high tensile strength, high tear resistance, and excellent heat resistance, and is applicable to the field of packaging having the requirement on the temperature of 80 DEG C and above; the easy-care micro-foam film packaging paper material is environmentally friendly and biodegradable, has excellent oil barrier property and has good adhesion with paper, and production efficiency is high as film surface post-treatment is omitted.

The invention relates to a preparation method of an anti-ultraviolet, antistatic, and anti-pilling polyester chip, which comprises an esterification reaction procedure and a polymerization reaction procedure; the esterification reaction procedure comprises a primary esterification reaction phase and a secondary esterification reaction phase, and flexible polyethylene glycol is introduced into thesecondary esterification reaction phase as a third monomer; after the esterification is completed, a hindered amine light stabilizer and a hindered phenol antioxidant, which are respectively blended with solvents of acetic acid and glycol, as well as hydroxyl silicone oil are added; after the prepolymerization of the polymerization reaction procedure is finished and before the final polymerization, an ultraviolet absorbent and an antistatic agent are added. Polyester fibers spun by the polyester chip obtained by the method of the invention have excellent anti-ultraviolet, antistatic, and anti-pilling effect; when the polyester fibers are woven into knitted fabrics and woven fabrics, related technical indexes obtained by testing are that: the ultraviolet transmittance is not more than 5.0%; the anti-pilling performance is not less than grade 4; and the fiber volume specific resistance is not more than 10*1010 omega.cm.

The invention discloses a preparation process of a high-end release protection polyester base film for an OCA, which comprises the OCA. The OCA is produced by adopting an ABA three-layer structure, when the OCA is laminated, the thickness of a light release film is generally required to be 25-55 mum, the release force is 5-20 mm/g, and the thickness of a heavy release film is 50-100 mum, and the release force is 30-110 mm/g, the thickness of the adhesive layer is 45-100 mum, the shore hardness is 40-50 D, when a customer needs electrostatic treatment, the viscosity of one surface of the film before coating is about 5500 mps.s, and the solid content is about 95%, and by compounding and superposing the multiple adhesive layers, the obtained OCA has a better effect on the basis of ensuring complete curing of each adhesive layer, and has excellent optical apparent performance, excellent transparency and good haze, is free of crystal points, white points and other impurities and foreign matters, and can realize observation of bubbles, foreign matters and other defects in OCA under the condition of not removing the protective film.