469 results about "Isophthalic acid" patented technology

The invention relates to the technical field of polyester fibers, in particular to a high-strength wear-resistant polyester fiber and a preparation method thereof. The invention aims to solve the problem that the mechanical strength and wear resistance of the existing polyester fiber are difficult to consider at the same time. The preparation method comprises the following steps: carrying out esterification and polycondensation on terephthalic acid, ethylene glycol, hydroxyl-terminated polydimethylsiloxane and isophthalic acid to obtain modified PET; the preparation method comprises the following steps: respectively carrying out oxidation treatment on graphene and a multi-walled carbon nanotube, and then adding polyether amine for grafting; carrying out melt blending with PET slices to obtain nano master batches; carrying out melt blending on the chopped glass fibers and the PET slices to prepare micron master batches; and mixing the modified PET, the nano master batch and the micron master batch, carrying out ultrasonic dispersion, adding an auxiliary agent, and carrying out melt spinning, three-section stretching and three-section heat setting treatment to obtain the high-strength wear-resistant polyester fiber. Through the synergistic effect of the components and the process, the prepared fiber has excellent mechanical properties and wear resistance, and has wide application prospects in the fields of clothing, home textiles, industry and the like.

The invention relates to the technical field of high-performance polyester, in particular to a high-strength low-shrinkage polyester fiber and a preparation method thereof. The defects that existing polyester fibers are poor in strength and shrinkage resistance are overcome. The preparation method comprises the following steps: mixing the modified resin, the modified nano silicon dioxide, the composite antioxidant, the composite nucleating agent and the composite lubricant, and carrying out melt spinning. Wherein the modified resin is prepared from the following raw materials: dimethyl terephthalate, isophthalic acid, ethylene glycol and isosorbide; the modified nano silicon dioxide comprises nano silicon dioxide, KH570 and silver nitrate; the composite antioxidant comprises an antioxidant 1010, an antioxidant 168 and an antioxidant 1222; the composite nucleating agent comprises sodium benzoate and nano montmorillonite; the composite lubricant is prepared from ethylene bis stearamide and pentaerythritol stearate. The prepared polyester fiber is high in strength, high in shrinkage resistance and suitable for manufacturing of outdoor equipment.

A toner includes toner particles each containing a binder resin. The binder resin contains 50% or more by mass of a polyester A containing 60 mol % or more of a unit derived from isophthalic acid as an acid component. The toner includes agglomerates on surfaces of the toner particles, each of the agglomerates containing silica and a resin. The toner has a CI (% by number) of 1% or more by number and 15% or less by number, CI being the percentage by number of the toner particles including the agglomerates. The percentage by number of the toner particles including the agglomerates satisfies predetermined requirements.

The invention belongs to the technical field of plastic processing, and particularly relates to a hydrophobic solvent-resistant biodegradable polyester material as well as a preparation method and application thereof in plastic bottles. The preparation method of the hydrophobic solvent-resistant biodegradable polyester material comprises the following steps: reacting polyol glycidyl ether with acrylic acid to prepare polyol glycidyl ether acrylate; the preparation method comprises the following steps: reacting isophthalic dihydrazide with polyol glycidyl ether acrylate to prepare a modifier; pBAT reacts with a modifier and an acrylic acid fluorine monomer to obtain the hydrophobic solvent-resistant biodegradable polyester material. The hydrophobic solvent-resistant biodegradable polyester material adopts PBAT as matrix resin, has biodegradability, has good hydrophobicity and solvent resistance through modification treatment of the modifier and the acrylic acid fluorine monomer, and can be applied to manufacturing of plastic bottles.

The invention discloses unsaturated polyester resin for an optical cable reinforcing core and a preparation method thereof, and belongs to the technical field of unsaturated polyester resin. The composition is composed of the following components: PG, IPA, a catalyst, maleic anhydride, AA, styrene, an antioxidant, a first polymerization inhibitor, a second polymerization inhibitor and a third polymerization inhibitor. The ratio of alcohol to acid is (1.08-1.12): 1; the activity is (3.4-3.8): 1; the molar ratio of AA to IPA is 1: (12-16); the preparation method comprises the following steps: 1) uniformly mixing propylene glycol, a catalyst and isophthalic acid; 2) raising the temperature, preserving the heat and raising the temperature again; cooling, sequentially adding a first polymerization inhibitor, maleic anhydride and adipic acid, heating, keeping the temperature, and heating again; 3) cooling and adding a second polymerization inhibitor, and 4) cooling and adding styrene, a third polymerization inhibitor and an antioxidant, uniformly mixing, and cooling to less than or equal to 60 DEG C to obtain the unsaturated polyester resin for the optical cable reinforcing core. The unsaturated polyester resin for the optical cable reinforcing core has the characteristics of high bending strength and high temperature resistance.

This invention discloses a one-piece molded all-plastic flexible hose sheet and its composite hose, belonging to the field of polymer material technology. The one-piece molded all-plastic flexible hose sheet of this invention has a three-layer structure: an outer PE film, an intermediate layer, and an inner PE film. The intermediate layer is selected from one of the following: an intermediate polymer layer, a three-layer composite layer formed by an intermediate polymer layer, a polyethylene layer, and an intermediate polymer layer, or a three-layer composite layer formed by an intermediate polymer layer, an ethylene-vinyl alcohol copolymer layer, and an intermediate polymer layer; the intermediate layer may have a double-sided coated or uncoated adhesive layer; the intermediate polymer layer is polymerized from 2,6-dihydroxyisophthalic acid, diaminoalkane, and 4,4'-tetraphenylsilane. The all-plastic flexible hose sheet provided by this invention is formed in one piece using a five-layer co-extrusion machine, possessing excellent gas barrier properties, water vapor barrier properties, high mechanical strength, and good interlayer peel strength.

The invention discloses an epoxy powder coating and a preparation method thereof, and belongs to the technical field of powder coating production, firstly, the epoxy powder coating is prepared from the following raw materials in parts by mass: 100 parts of epoxy resin, 15-20 parts of modified phenolic resin, 12-15 parts of carboxyl-terminated polyester resin, 4-8 parts of nano cerium oxide coated mica, 1.5-2.0 parts of a flatting agent and 0.5-1.0 part of benzoin; the modified phenolic resin is prepared by carrying out addition on bisphenol A phenolic resin and DOPO, neutralizing and carrying out reduced pressure distillation; the carboxyl-terminated polyester resin is prepared by carrying out esterification polycondensation on terephthalic acid, isophthalic acid, neopentyl glycol and trimethylolpropane, and then modifying by trimellitic anhydride; the nano cerium oxide coated mica is prepared by coating white mica powder with cerium oxide precipitate, and then carrying out surface treatment and crushing.

The invention relates to a preparation device of isophthalic acid-5-sodium sulfonate, and belongs to the technical field of preparation of isophthalic acid-5-sodium sulfonate. Comprising a reaction kettle body, a top cover is arranged at the top of the reaction kettle body, a jacket is arranged in the reaction kettle body, a discharging pipe and a heat-carrying medium inlet pipe are arranged at the bottom of the reaction kettle body, and the discharging pipe is communicated with the interior of the reaction kettle body; the invention also discloses a preparation method. Through rotation of the stirring shaft, the mixing and stirring effects can be achieved, the annular discharging base can be driven to rotate, multiple manual operations are not needed in the whole process, and the effects of automatic material distribution and batch discharging can be achieved only by putting all the needed isophthalic acid into the reaction kettle body at a time; the device is simple to operate, improves the working efficiency, is safe in operation process, is not liable to cause harm to a human body, can meet the requirement of automatic feeding, and can enable the whole production process to be more precise.

The invention relates to the technical field of powdered ink, and discloses a plant-based environment-friendly powdered ink composition which comprises the following components: resin, a coloring agent, a charge control agent, wax / a release agent and an additive. The resin comprises polyester resin and bio-based resin. The polyester resin comprises polyhydric alcohol and polybasic acid. The polyol comprises ethylene glycol, neopentyl glycol and a bisphenol A derivative. The polybasic acid comprises terephthalic acid, isophthalic acid and oxalic acid. Compared with the prior art, the plant-based environment-friendly powdered ink composition provided by the invention has the advantages that the plant-based environment-friendly powdered ink composition is based on a plant-oil-based biodegradable material and is prepared from plant oil, polyhydric alcohols and polybasic acid compounds, so that the excellent biodegradability and moisture resistance of the plant oil are kept; and when the resin is used for preparing the biological powdered ink, the biodegradability and moisture resistance of the powdered ink can be effectively improved, and the biological powdered ink prepared from the resin has excellent biodegradability, moisture resistance, performance retentivity and fixing strength.

The invention relates to rosin modified resin and a preparation process thereof and low-odor printing ink, the rosin modified resin is prepared from maleic anhydride, sulfonate alkyd resin, rosin and a metal organic framework, and the sulfonate alkyd resin is prepared from neopentyl glycol, dibutyltin dilaurate, m-phthalic acid-5-sodium sulfonate, phthalic anhydride and pentaerythritol. The printing ink has the effect of improving the strength and smell of the printing ink.

The invention discloses a simple preparation method of a barium-based metal organic framework (Ba-H2Sip) and proton conduction application of the barium-based metal organic framework (Ba-H2Sip), belongs to the field of functional material synthesis and energy application, and is characterized in that functional differentiation design of a 5-sulfoisophthalic acid ligand: a sulfonic group forms a two-dimensional layered structure by chelating Ba < 2 + >; the carboxyl groups are differentiated into'anchoring carboxyl groups' for constructing a three-dimensional supramolecular skeleton and'proton supply carboxyl groups' for providing a proton source, and the design is reported for the first time in Ba-based MOFs; according to the present invention, the large-scale preparation can be achieved by stirring the low-cost raw material in 1 mol / L hydrochloric acid at the room temperature, the yield exceeds 70%, the product can resist 8 M acid and pH = 13 alkali liquid, the conductivity at 90 DEG C / 90% humidity can achieve 1.39 * 10 <-2 > Scm <-1 >, the high-temperature process is not required, the raw material is low in cost and easy to obtain, and the feasible scheme is provided for the high-efficiency proton conductor industrialization.

A desulfurizing agent according to the present disclosure is a desulfurizing agent for removing a sulfur compound from a fluid containing moisture and the sulfur compound, the desulfurizing agent comprising: at least one metal ion selected from the group consisting of aluminum ions, iron ions, and copper ions; and an organic ligand coordinated to a metal ion, the organic ligand containing isophthalic acid optionally having a substituent group at the 5-position of a benzene ring, and diffraction peaks respectively present in the range of diffraction angles of 10.9 DEG + / -0.3 DEG and the range of diffraction angles of 18.1 DEG + / -0.3 DEG in an X-ray diffraction pattern of the desulfurizing agent measured using Cu-K alpha rays.

Provided is a toner that includes a toner particle containing a binder resin; and an external additive, wherein the binder resin contains a polyester resin A; when a content of the polyester resin A in the binder resin is taken as Wp (mass %), Wp is 50 mass % or more; when a content ratio of the monomer unit Uiso corresponding to isophthalic acid to all monomer units corresponding to polycarboxylic acids in the polyester resin A is taken as MIPA (mol %), MIPA is 40 mol % or more; the external additive contains inorganic fine powder; and the inorganic fine powder contains a silica fine particle having aluminum hydroxide on the surface thereof.

The application discloses an indium-based oxide catalyst, which is prepared by the following method: step one, adding indium nitrate, isophthalic acid, DMF, acetonitrile, imidazole and nitric acid into a reaction kettle, reacting at 80 DEG C for 12 hours, then heating to 100 DEG C and reacting for 24 hours, washing with DMF and anhydrous ethanol respectively, and vacuum drying for 12 hours to obtain an In-MOF precursor; step two, keeping the In-MOF precursor under the condition of nitrogen atmosphere and 200-600 DEG C for 4 hours, and naturally cooling to room temperature to obtain the indium-based oxide catalyst. Most of the prepared indium-based oxide catalysts still retain the corresponding three-dimensional hierarchical porous framework structure of the original MOF; the indium-based oxide catalyst contains highly dispersed metal active sites inside, effectively reduces the aggregation of metal oxides or metal elements, and thus exhibits more excellent catalytic activity; the organic ligand isophthalic acid generates a large amount of carbon material through pyrolysis under an inert atmosphere, greatly improving the conductivity of the indium-based oxide catalyst.

The invention discloses an anti-fouling curtain structure for water dredging engineering, and belongs to the technical field of environment protection of dredging engineering, the anti-fouling curtain structure for water dredging engineering comprises a floating body, an anti-fouling curtain and a vertical body, the floating body is arranged at the top end of the anti-fouling curtain, the vertical body is arranged at the bottom end of the anti-fouling curtain, and the anti-fouling curtain is geotechnical cloth; the geotechnical cloth is prepared from the following components in parts by weight: 100 to 150 parts of polyester, 20 to 50 parts of copolyester and 5 to 30 parts of inorganic filler, the copolyester is a copolymer of terephthalic acid, 5-sulfoisophthalic acid sodium salt, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole, and the geotechnical cloth is further prepared by a post-treatment step. According to the invention, the copolyester composed of terephthalic acid, sodium 5-sulfoisophthalic acid, ethylene glycol and dihydroxyl-terminated polyvinyl imidazole and the inorganic filler are added into the polyester fiber, and the polyester fiber is modified through a post-treatment step, so that the alkali resistance and the antifouling property of the antifouling curtain are improved.

The invention relates to the technical field of cables, and provides a corrosion-resistant control cable and a preparation method thereof. The corrosion-resistant control cable sequentially comprises a conductor, an insulating layer, a shielding layer and a sheath layer from inside to outside, wherein the sheath layer comprises the following components in parts by weight: 50-70 parts of polyvinyl chloride, 15-25 parts of ethylene propylene diene monomer, 10-20 parts of modified graphene oxide, 0.5-1.5 parts of an antioxidant, 3-5 parts of a plasticizer, 15-20 parts of a flame retardant, 2-4 parts of a compatilizer, 4-5 parts of an active agent, 1-3 parts of an assistant crosslinking agent and 1-3 parts of a crosslinking agent; wherein the modified graphene oxide is obtained by modifying graphene oxide with dimethyl 5-hydroxyisophthalate and N-hydroxymethyl acrylamide. According to the technical scheme, the problem of insufficient corrosion resistance of the control cable in the prior art is solved.

A polyester-based woven hook-and-loop fastener including: a woven-fabric and engaging elements, in which the woven-fabric in which a polyethylene terephthalate-based multifilament yarn is a warp yarn and a polyester-based heat-fusible multifilament yarn is a weft yarn is a woven base fabric, a yarn for the engaging elements made of at least one kind selected from the group consisting of a polyethylene terephthalate-based monofilament yarn and a polyester-based multifilament yarn, is woven in parallel to the warp yarn into the woven base fabric, the engaging elements that are formed of the yarn for the engaging elements, that are made of at least one kind selected from the group consisting of a large number of hook shapes and loop shapes, and that rise up from a front face of the woven base fabric, exist on the front face of the woven base fabric, bases of the engaging elements are fixed to the woven base fabric by a melt-solidified material of a heat-fusible component of the the polyester-based heat-fusible multifilament yarn, and the polyethylene terephthalate-based multifilament yarn is made of a copolymerized polyethylene terephthalate containing, as copolymerization components, 1.0 to 2.0 mol % of isophthalic acid with respect to a total amount of dicarboxylic acids and 2.0 to 3.5 mol % of diethylene glycol with respect to a total amount of diols.

The invention belongs to the technical field of fuel cell proton exchange membranes, and discloses a hydroxyl-containing modified polybenzimidazole proton exchange membrane and a preparation method thereof. According to the modified polybenzimidazole, a monomer (5-hydroxyisophthalic acid) containing a hydroxyl structure is added during polymerization of a raw material monomer, and the novel hydroxyl-containing modified polybenzimidazole is obtained through an imidazole forming reaction. The hydroxyl-containing modified polybenzimidazole can be prepared into the modified polybenzimidazole proton exchange membrane by using a solution casting method. According to the modified polybenzimidazole disclosed by the invention, stable doping of phosphoric acid in the membrane is facilitated by introducing hydroxyl and ether bonds, so that more proton carriers are kept under an anhydrous condition, the phosphoric acid doping rate of the prepared proton exchange membrane is further improved, and construction of a proton transmission channel is facilitated. The novel hydroxyl-containing modified polybenzimidazole proton exchange membrane has a good application prospect in the aspect of proton exchange membrane fuel cells.

The invention relates to a fluoro-ligand regulated metal organic framework material and a preparation method and application thereof, the fluoro-ligand regulated metal organic framework material is prepared and synthesized by using zirconium oxychloride as a metal node and trimesic acid / 5-fluoroisophthalic acid as an organic ligand through a reflux method; the unit structural formula of the fluorinated ligand metal organic framework material is [Zr6O4 (OH) 4 (BTC) 2-x (F-BTC) x (AA) y (H2O) z], according to the preparation method, trimesic acid and part of 5-fluoroisophthalic acid are co-coordinated, a C-F bond is introduced to regulate and control the electronic environment around a Zr node through deletion of a connecting site, uniform nucleation of crystals is promoted, the grain size of the obtained material is remarkably reduced, and the dispersity is higher.

The invention relates to the technical field of high polymer materials, and provides a hard foaming polyester material and a preparation method thereof, the hard foaming polyester material comprises the following raw materials by mass: 10000 to 15000 parts of 1, 4-butanediol, 800 to 850 parts of diethylene glycol, 9000 to 11000 parts of terephthalic acid, 6000 to 8000 parts of isophthalic acid, 10 to 15 parts of a catalyst, and 15 to 25 parts of an antioxidant. The rigid acid, the flexible acid, the rigid alcohol and the flexible alcohol are jointly used, efficient environment-friendly catalysis and anti-aging components are combined, and a hard foaming polyester material system which is high in strength, high in melting point, uniform in foam hole, high in heat stability, environment-friendly and controllable is established.

The invention discloses semi-aromatic nylon and a preparation method thereof, and belongs to the technical field of polyamide materials, the method comprises the following steps: adding calcium carbonate, a coupling agent and polyformaldehyde foam, and mixing to obtain pretreated calcium carbonate; the pretreated calcium carbonate, bio-based 2, 5-bis (aminomethyl) furan, bio-based isophthalic acid and an acid catalyst are mixed for polymerization, and a polymerization melt is obtained; performing post-treatment to obtain semi-aromatic nylon; the nylon prepared by adopting the formula and the method disclosed by the invention has the rigidity of wholly aromatic nylon and the toughness of semi-aromatic nylon, and is mild in synthesis condition and low in energy consumption; the addition of the polyformaldehyde foam can reduce the use amount of the coupling agent, reduce the addition of the auxiliary agent and improve the performance of the nylon material, and the polyformaldehyde foam gasifies and escapes from the system after assisting the uniform dispersion of the calcium carbonate, so that the introduction of the auxiliary agent is further reduced; the nylon can be applied to the fields of automobiles, electronics, ocean engineering or aerospace and the like.

This invention discloses an ultrafine polyethylene / polyester composite fiber and its preparation method, belonging to the field of composite fiber technology. It solves the problems of poor compatibility between the core and sheath layers, excessive fineness of PE / PET fibers, and difficulties in achieving ultrafine fiber production in existing technologies. The method involves preparing ultrafine polyethylene / polyester composite fibers using a core-sheath composite spinning process. The single filament fineness of the ultrafine polyethylene / polyester composite fiber is 0.6~0.8 dtex. The ultrafine polyethylene / polyester composite fiber has a core-sheath structure, with the sheath material being polyethylene and the core material being a blend of modified polyester and a compatibilizer. The modified polyester molecular chain consists of terephthalic acid segments, ethylene glycol segments, and isophthalic acid segments. The compatibilizer is a graft copolymer of polyethylene and poly(ethylene-co-glycidyl methacrylate)-g-polymethyl methacrylate. The preparation method of this invention is simple and easy to implement, with excellent core-sheath compatibility, which is beneficial for achieving ultrafine fiber production. The composite fiber exhibits excellent performance and can meet the demands of the high-end market.

The invention discloses a polyurea composite coating based on MXene at carbon dots. The composite coating is prepared by heating and curing a polyurea composite elastomer based on MXene at carbon dots and an organic solvent, the polyurea composite elastomer based on the MXene (at) carbon dots is prepared by mixing a polyurea elastomer and MXene (at) carbon dot powder; the polyurea elastomer is prepared from the following raw materials: isophorone diisocyanate, poly (propylene glycol) bis (2-aminopropyl ether), isophthaloyl hydrazine and 4, 4 '-diaminodiphenyl disulfide through a two-step condensation polymerization reaction. Based on the synergistic effect of dynamic hydrogen bonds and flexible disulfide bonds of a self-repairing polyurea elastomer structure in the composite coating, the self-repairing characteristic of the composite coating is remarkably enhanced, meanwhile, a brick mud structure is formed through uniform embedding of MXene at carbon dots, and the mechanical strength, corrosion resistance, heat stability and rapid self-repairing capacity of the composite coating are greatly improved.

The invention provides a sodium ion specific fluorescence labeled transparent soil sample as well as a preparation method and application thereof, and belongs to the technical field of rock soil and geological engineering. The method comprises the following steps: firstly, sequentially carrying out hydrophilization treatment, solvent evaporation and dissolution on a sodion combined benzofuran isophthalate probe to obtain a probe mother solution; mixing the probe mother solution, a buffer solution, an inorganic sodium salt solution and a solvent to prepare a fluorescence labeling pore solution; and finally, mixing the sodium polyacrylate particles and the fluorescence labeled pore liquid, and performing vacuum saturation treatment to obtain the transparent soil sample. The transparent soil sample provided by the invention still keeps excellent optical transparency while having sodium ion specific response capability, so that a stable and reliable experimental medium is provided for in-situ, real-time and full-field observation of sodium ion migration.

Toner includes toner particles containing a binder resin and an external additive, wherein 1) the binder resin contains a polyester A in an amount of 50% by mass or more, and the polyester A contains a unit Uiso derived from isophthalic acid in an amount of 90% by mole or more based on all units derived from an acid component, and 2) the toner contains hydrotalcite particles as the external additive.

The invention discloses water-soluble nylon glue and a preparation method thereof, and relates to the technical field of water-soluble glue. The preparation method comprises the following steps: preparing a water-soluble polyamide solution from sodium 5-sulfoisophthalate, polyether amine, N-methyl pyrrolidone, pyridine, an antioxidant and an auxiliary agent, adding an inorganic filler, a film-forming agent, a wetting agent and a thickening agent into the water-soluble polyamide solution serving as a base material, and preparing the water-soluble nylon glue under the conditions of heating and high-speed dispersion. The adhesive has the characteristics of good water solubility, high bonding strength and environmental friendliness.

The utility model discloses a dimethyl isophthalate production distillation device, which relates to the technical field of distillation devices, and comprises a filter box, a heating box and a cooling box, the middle part of the upper end of the filter box is provided with a placing hole, the front end of the filter box is provided with an open slot, the inner wall of the placing hole is provided with a liquid storage component, and the inner wall of the open slot is rotatably connected with a door component; a barrier plate is fixedly connected to the upper end of the inner wall of the filter box, an inclined plate is fixedly connected to the inner wall of the filter box, a detachable filter cleaning assembly is arranged in the middle of the inner side of the filter box and comprises two symmetrically-arranged fixing plates fixedly connected to the inner wall of the filter box, and a sleeve column is fixedly connected to the upper end of each fixing plate. The outer ends of the sleeve columns are slidably connected to movable sleeve plates, and a filter screen is fixedly connected between the two movable sleeve plates. According to the utility model, the filter screen can be moved up and down, so that impurities in filter screen holes are shaken, and the filtering efficiency and the distillation efficiency of liquid are improved.

The invention discloses a preparation method of a self-cleaning antibacterial anti-mite fabric, and relates to the technical field of fabric preparation, and the preparation method comprises the following steps: 1-5 g of Cu (NO3) 2.6 H2O, 0.1-1.5 g of isophthalic acid, 20-50 mL of water and a certain antibacterial enzyme mixture are sequentially poured into a glass beaker, stirring is performed for 30 min, uniform mixing is performed, and the antibacterial anti-mite fabric is obtained; pouring the mixture into a 25mL polytetrafluoroethylene inner container, putting the inner container into a high-pressure kettle, sealing, carrying out high-temperature reaction for 72 hours in a drying oven at 90 DEG C, separating out a light blue product by using a centrifugal machine after the reaction is completed, washing for multiple times by using water, drying, mixing the obtained light blue powder with PET slices, melting and granulating, and drying to obtain the PET composite material. The preparation method comprises the following steps: preparing a bio-enzyme coated with a metal frame, mixing the bio-enzyme coated with the metal frame with common polyester chips, carrying out melt spinning to prepare multifunctional polyester fibers containing the bio-enzyme coated with the metal frame, taking the polyester fibers as weft yarns and cotton fibers as warp yarns, and interweaving into gray fabric according to a certain rule, so that the problem that the existing antibacterial anti-mite fabric is poor in effect durability is solved.

The application discloses application of 2-amino isophthalic acid (2-AIA) as a MALDI matrix in characterization of oligosaccharide additives in food. The skeleton structure of 2-AIA has a strong ultraviolet absorption group and a protonation site, which is beneficial to laser energy transmission and desorption ionization process of the measured object. Meanwhile, 2-AIA has multiple polar functional groups, which can effectively enhance the directional combination of the hydroxyl group of 2-AIA and oligosaccharide, and improve the anti-interference ability of impurities in a complex system. In addition, 2-AIA and a traditional organic matrix alpha-cyano-4-hydroxycinnamic acid (CHCA) are combined as a binary matrix (CHCA / 2-AIA), which can play a synergistic role of the double matrix, significantly improve the detection sensitivity of oligosaccharide. On the other hand, the combination of CHCA and 2-AIA with different pH values can significantly improve the uniformity of the co-crystallization, and improve the accuracy and reproducibility of quantitative detection.

A toner includes a toner particle that contains a binder resin, and an external additive. The binder resin contains 50% by mass or greater of polyester A, and the polyester A contains 90% by mole or greater of an isophthalic acid unit Uiso with respect to an amount of all units derived from an acid component. The external additive contains a titanate fine particle.