346 results about "Polyester composite" patented technology

The invention discloses a photo-thermal aging resistant polyester composite material and a preparation method thereof, a modified monomer, a modified filler, benzophenone, terephthalic acid and neopentyl glycol are subjected to esterification condensation polymerization to prepare the composite material, and the modified monomer is added, so that the prepared polyester molecule is of a branched structure; the side chain of a polyester molecule and the surface of the modified filler both contain unsaturated double bonds which can react after being irradiated by ultraviolet light, so that the number of crosslinking points of the composite material is increased, the crosslinking density is further improved, and the anti-aging effect of the material is further improved; the modified filler can improve the high-temperature-resistant effect of the composite material, the modified filler is matched with the hindered phenol structure of the side chain to further improve the heat aging-resistant effect of the composite material, hydroxyl and ketone groups on the modified filler form intramolecular hydrogen bonds, light energy can be converted into heat energy to be released, and then the light aging-resistant effect of the composite material is improved.

The invention relates to the field of functional fabrics, and provides a flame-retardant fabric with infrared shielding performance and a preparation method thereof, and the fabric is prepared from blended yarns of polyester composite fibers and surface modified polyimide composite fibers through a textile process. The polyester composite fiber comprises magnesium hydroxide / zinc oxide composite filler and is prepared through melt blending and spinning, and the surface modified polyimide composite fiber is obtained through basic zinc carbonate surface modification treatment. Zinc oxide particles and magnesium hydroxide nanowires in the magnesium hydroxide / zinc oxide composite filler have a synergistic effect, so that the flame retardance and the infrared shielding capability of the fiber are enhanced; the use of the surface modified graphene improves the mechanical and thermal stability of the polyimide fiber. By reasonably regulating and controlling the fiber proportion and weaving density, the fabric has excellent mechanical property, infrared shielding property and flame retardant property while ensuring the flexibility, and has wide application value.

The invention relates to a full-biodegradable polyester composite material and a heat shrink film thereof. Corn starch, PBAT and PLA are used as main raw materials, glycerin, water and polyethylene glycol-6000 are used as composite plasticizers, B225 is used as an antioxidant, and solid paraffin and oleamide are used as lubricants. The preparation method comprises the following steps: adding corn starch, glycerol, water, PEG-6000, B225, solid paraffin and oleamide into a high-speed mixer, stirring to obtain plasticized corn starch, adding PBAT and PLA into the high-speed mixer, mixing with the plasticized corn starch, stirring, discharging, putting into an extruder, extruding and granulating to obtain a full-biodegradable polyester composite material, and extruding and blowing to obtain the thermal shrinkage film. The polyester composite material prepared by the invention can be biodegraded under the condition of matured compost, the biodegradation rate is 91.22%, the relative biodegradation rate is 96.55%, and products are carbon dioxide and water and meet the GB / T 41010-2021 standard requirements.

The invention provides a succinic acid composition as well as polyester and a polyester composite material prepared from the succinic acid composition. The succinic acid composition comprises succinic acid, a compound containing sulfate radicals and a phosphorus compound, the mass content of sulfate radicals in the succinic acid composition is 240 to 500 ppm; the mass content of the phosphorus element in the succinic acid composition is 0.5 to 40 ppm. According to the present invention, by compounding the sulfate radical-containing compound and the phosphorus compound with the specific content, the polyester is prepared by using the succinic acid composition as the raw material, such that the production efficiency of the polyester can be ensured, the polyester with characteristics of low acid value and high viscosity can be obtained, and the corrosion of the polyester or the composition thereof on the metal equipment can be reduced during the polyester composite material extrusion process; the quality of the polyester composite material is ensured.

The utility model belongs to the technical field of reeling equipment, and particularly relates to a high-strength folding-resistant polyester composite filament reeling device which comprises a base, a partition plate is fixedly arranged in the base, a motor is fixedly arranged on the front face of the base, and the output end of the motor penetrates through the inner wall of the front face of the base and is fixedly provided with a winding cylinder. Through the arrangement of the rotating rod, the tool apron, the connecting shaft, the positioning screw rod, the scraper knife, the pressing rod, the limiting strip, the containing hole, the spring and the ejector rod, the scraper knife is installed in the tool apron before cleaning, the pressing rod extrudes the scraper knife, rapid positioning of the scraper knife can be achieved, and the scraper knife can be conveniently and rapidly cleaned. And after installation is completed, the angle of the scraper knife is adjusted through the rotary disc, then the motor is started, the motor drives the winding barrel, the scraper knife is attached to the surface of the winding barrel, cleaning of the polyester yarn can be achieved, manual cleaning of related personnel is not needed, and the labor amount is reduced.

The present invention relates to a high thermal conductivity powder coating, and in particular to a low gloss modified saturated polyester powder coating and its preparation method and application. In parts by weight, the high thermal conductivity powder coating includes the following components: 50-100 parts of graphene oxide modified high acid value saturated terminal carboxyl polyester resin, 50-100 parts of graphene oxide modified low acid value saturated terminal carboxyl polyester resin, 5-18 parts of curing agent, 5-30 parts of thermal conductive filler, 10-30 parts of pigment filler, and 1-8 parts of auxiliary agent. Wherein the graphene oxide modified high and low acid value saturated terminal carboxyl polyester resins are graphene oxide / terminated carboxyl polyester composite resins prepared by in-situ polymerization, and the acid values ​​of the two are 45-65 mgKOH / g and 15-25 mgKOH / g, respectively. The powder coating obtained by the present invention has the characteristics of low gloss, good adhesion and leveling performance, and excellent thermal conductivity and heat dissipation performance. The powder coating obtained by the present invention can be applied to the heat dissipation of LEDs, industrial equipment, automotive parts, 3C parts, etc.

The invention provides a polydopamine nanosheet, a polydopamine-polyester composite material as well as a preparation method and application of the polydopamine nanosheet and the polydopamine-polyester composite material, and relates to the technical field of nano materials. According to the preparation method of the polydopamine nanosheet, provided by the invention, the template is formed by utilizing the organic matter with self-assembly characteristic molecules, and then the polydopamine nanosheet with a relatively large size is formed by polymerizing dopamine on the template, so that the problem that the size of a two-dimensional polydopamine nanosheet prepared in the prior art is relatively small is solved. According to the preparation method of the polydopamine-polyester composite material, the polydopamine-polyester composite material is synthesized through an in-situ polymerization method, the polydopamine-polyester composite material is a strong-interface high-performance organic-organic nano composite material, the strength, toughness and barrier property of the polydopamine-polyester composite material are all greatly improved compared with those of products of the same type, and the polydopamine-polyester composite material has excellent biocompatibility and can be used for preparing the composite material. The application potential in the fields of packaging and biomedicine is huge.

The utility model relates to an automatic winding structure for storing antistatic cationic polyester composite yarns applied in the field of winding structures, comprising a winding roller shaft installed in a winding machine, a strip groove is provided at the front end of the winding roller shaft, and the upper and lower ends of the strip groove are symmetrically hinged with inclined strips, an electric push rod is fixedly connected to the rear inner wall of the strip groove, an output end of the electric push rod is fixedly connected to a vertical plate, and an end of the vertical plate away from the electric push rod is fixedly connected to a cutting strip knife, in this scheme, the cutting strip knife moves out of the strip groove along the gap to cut the wire body, and before cutting the wire, a winding sleeve can be arranged outside the winding roller shaft, and the thickened inner liner surface of the inner side wall of the winding sleeve can provide a force-bearing surface for the cutting of the cutting strip knife, so that the cutting effect of the waste wire body outside the winding roller shaft is better, and the sharpening inner liner layer can remove the passivated part of the cutting strip knife, which is beneficial to ensuring the cutting efficiency of the cutting strip knife.

The utility model discloses a wear-resistant polyester composite fabric which comprises a wear-resistant fabric layer and an antibacterial fabric layer which are compounded with each other, the wear-resistant fabric layer is formed by interweaving double-filament different-twisting-direction fasciated yarns, and the double-filament different-twisting-direction fasciated yarns comprise core yarns, first fasciated filaments and second fasciated filaments, wherein the first fasciated filaments and the second fasciated filaments spirally wrap the outer sides of the core yarns in opposite directions; the core yarn comprises polyester cotton blended yarn; the first wrapping filaments are graphene modified chinlon filaments, and the second wrapping filaments are polypropylene filaments. According to the wear-resistant polyester composite fabric, the nylon filaments and the polypropylene filaments are spirally wrapped on the outer sides of the polyester blended yarns in the wear-resistant fabric layer, so that the wear-resistant effect of the polyester composite fabric can be improved by effectively utilizing the wear-resistant characteristics of nylon and polypropylene.

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 relates to the technical field of fabric fabrics, in particular to preparation of a stain-resistant and waterproof polyester composite fabric. The invention discloses a stain-resistant waterproof polyester composite fabric and a preparation method thereof, the composite fabric is composed of three layers from outside to inside, the first layer is a polyester filament yarn surface layer subjected to fluorinated graphene and plant source C18 alkylsilane amphiphobic finishing; the second layer is a copolyamide hot melt adhesive net film with a melting point of 105 DEG C; and the third layer is a degradable multifunctional thermoplastic polyurethane elastomer film loaded with silver zeolite antibacterial microcapsules and conductive carbon nanotubes. An amphiphobic finishing liquid is uniformly deposited on the surface of polyester by adopting a supercritical CO2 one-step method, and nanoparticles and fibers are covalently bonded through a chitosan-citric acid cross-linked network, so that the waterproof grade is still greater than or equal to 90 after 30 times of water washing, the oil repellent grade is greater than or equal to 5, and the water contact angle and the oil contact angle are reduced by lt; the temperature is 5.5 DEG C, and the moisture permeability retention rate is gt; the antibacterial rate is 97%, and the antibacterial rate is gt; the compost degradation rate within 180 days is gt; 90%.

The invention relates to the technical field of composite films, in particular to a polyester composite film and a preparation method and application thereof. The polyester composite membrane comprises a support membrane and a polyester separation layer, wherein the polyester separation layer comprises a polybasic hydroxyl monomer and a polybasic acyl chloride monomer. The polyester composite membrane provided by the invention can accurately regulate and control the effective cut-off molecular weight, can overcome the technical limitation that the existing polyester membrane is difficult to effectively separate small molecules especially in the aspect of separation of small molecular substances, and improves the separation effect.

The invention relates to the field of cable sheaths, and particularly discloses a migration-resistant cable sheath material and a preparation process thereof, and the cable sheath material comprises the following raw materials: PVC, a filler, a stabilizer, PE wax, a flame retardant, aluminum hydroxide, a polymer non-migration polyester plasticizer and stearic acid; wherein the macromolecular non-migration polyester plasticizer comprises di-iso-decylphthalate and a mica powder-adipic acid polyester composite plasticizer; the preparation method comprises the following steps: mixing the heavy calcium carbonate powder and the PVC powder, adding the stabilizer, the PE wax, the flame retardant, the aluminum hydroxide and the stearic acid, stirring, adding 1 / 2-2 / 3 of the total addition amount of the high-molecular non-migration polyester plasticizer, stirring, adding the rest of the non-migration high-molecular polyester plasticizer, refining the powder, extruding and granulating to obtain the migration-resistant cable sheath material. The cable sheath has the characteristics that the migration resistance of the plasticizer in the cable sheath is improved, and the durability of the cable sheath is improved.

The utility model provides a smooth and high-elastic waterproof fabric. The smooth and high-elastic waterproof fabric comprises a water-repellent smooth layer, a plain weave fabric layer, an adhesive layer and a waterproof and moisture-permeable polyurethane film layer which are sequentially compounded, the water-repellent smooth layer is an organic silica film layer; the plain weave fabric layer is of an organization structure formed by interweaving warp yarn and weft yarn in a one-up and one-down mode, the warp yarn and the weft yarn are elastic polyester composite yarn, and the elastic polyester composite yarn is formed by conducting parallel composite spinning on first polyester yarn and second polyester yarn. The first polyester yarn and the second polyester yarn are respectively 20-25D / 24F polyester fully drawn yarns, and the shrinkage rates of the first polyester yarn and the second polyester yarn are different. The waterproof fabric has elasticity similar to that of spandex, the elasticity is stable, the risk of'white exposure 'of conventional spandex fabric is overcome, and the waterproof fabric is waterproof, moisture permeable and good in surface hand feeling smoothness.

The invention relates to the technical field of polyester composite materials, in particular to a reinforced flame-retardant polyester composite material for a baking all-in-one machine shell and a preparation method of the reinforced flame-retardant polyester composite material for the baking all-in-one machine shell. The polybutylene terephthalate and the polybutylene terephthalate cooperate to obtain higher heat deformation temperature, heat resistance and high strength, and the polybutylene terephthalate has better fatigue resistance and dimensional stability and smaller creep deformation; the graft modified thermoplastic polyester elastomer is added, the special thermosensitive hydrophobicity of the graft modified thermoplastic polyester elastomer and the toughening property of the thermoplastic polyester elastomer are utilized, and the graft modified thermoplastic polyester elastomer, the toughening agent and the antioxidant have a synergistic effect, so that the hydrolysis resistance, the high-temperature and high-humidity resistance, the weather resistance, the high-low temperature impact toughness and the low shrinkage rate of the polyester composite material are improved; the added brominated flame retardant and halogen-free flame retardant have a synergistic flame retardant effect, so that the flame retardant requirement of the material can be met; the glass fibers have hydrolysis-resistant and low-warping effects, low shrinkage can promote the structure flatness of the product, and the glass fibers are particularly suitable for producing the baking all-in-one machine shell.

The utility model discloses a flame-retardant cationic polyester composite yarn winding device which comprises a winding table and a winding box, the winding box is arranged in the middle of one side of the top of the winding table, a winding shaft is arranged on the portion, on one side of the winding box, of the winding table, a lead screw is arranged in the middle of the interior of the winding table, a transmission block is arranged on the lead screw, and the transmission block is connected with the winding table. And a threading block is arranged in the middle of one side of the transmission block, a dust collection box is arranged in the middle of the bottom of the side, away from the winding shaft, in the winding box, a cleaning block is arranged in the middle of the top of the dust collection box, an annular groove is formed in the middle of the interior of the cleaning block, and an annular brush is arranged on the inner side of the annular groove. The yarn winding device has the advantages that dust and chippings on the surface of yarn can be removed during uniform winding, the quality of the yarn is prevented from being affected by the dust and chippings, the yarn can be cut after winding is completed, and the yarn is prevented from falling off.

The embodiment of the utility model provides a photovoltaic backboard and a solar photovoltaic panel. The photovoltaic backboard comprises an outer layer, a first adhesive layer, a middle layer, a second adhesive layer and an inner layer which are arranged in sequence, the outer layer adopts a polyethylene glycol terephthalate film; the first adhesive layer is used for bonding the outer layer and the middle layer; the middle layer is made of a continuous glass fiber reinforced thermoplastic polyester composite material; the second adhesive layer is used for bonding the middle layer and the inner layer; and the inner layer adopts a polyethylene film. The photovoltaic backboard is light in weight and high in strength, and has more excellent insulativity, aging resistance, environmental erosion resistance and dimensional stability.

The invention relates to the technical field of bio-based degradable high polymer materials, in particular to a bio-based degradable pearl wool microcellular foaming material. The composite material is prepared from the following components in parts by mass: 70-85 parts of a bio-based polyester resin composite system of polylactic acid and poly (terephthalic acid)-butylene adipate (in a mass ratio of 60: 40-75: 25), 10-20 parts of bagasse microfibers modified by a silane coupling agent, 1.5-4 parts of a composite nucleating agent of flaky talcum powder and spherical nano calcium carbonate (in a mass ratio of 1.5: 1-2.5: 1), the bio-based plasticizer is prepared by compounding epoxidized soybean oil and tributyl citrate, the montmorillonite degradation accelerant is loaded with iron and cobalt ions (the molar ratio is 3: 1-5: 1), and the mixed foaming agent is prepared from 5-12 parts of supercritical carbon dioxide and nitrogen (the volume ratio is 60%-85%). A bio-based polyester composite system of polylactic acid and PBAT is adopted, silane modified bagasse microfibers are matched, montmorillonite loaded with iron and cobalt ions serves as a degradation accelerant, a bio-based plasticizer and the like are combined, and the composite material is prepared through a twin-screw extrusion melt blending and supercritical fluid foaming technology.

The invention relates to the field of cable materials, and provides an anti-UV environment-friendly photovoltaic solar cable which structurally comprises a cable core, an isolating layer, an insulating layer, a shielding layer and an outer layer. And the outer layer is prepared from a modified polyurethane and polyester composite material, and is obtained by adopting components such as surface modified titanium dioxide / magnesium hydroxide filler, montmorillonite, thermoplastic polyurethane and modified polyester master batch through a melting and extruding process. The cable has excellent flame retardance, ultraviolet resistance and durability, can keep stable performance under atrocious weather conditions, and meets special requirements of solar power stations, roof solar panel systems and photovoltaic agricultural facilities. The preparation method comprises the steps of preparing the cable core, the isolation layer, the insulation layer, the shielding layer and the outer layer step by step, and finally extruding and coating the outer layer through double screws to ensure that the cable is safe, environment-friendly and durable.

The utility model relates to a knitted fabric with front and back checks, the knitted fabric with front and back checks is formed by interweaving polyester composite filaments, the knitted fabric with front and back checks comprises a fabric body with a front face and a back face, and the front face and the back face of the fabric body are respectively provided with a plurality of concave-convex three-dimensional checks with the same size. The fabric manufactured by the utility model is the knitted fabric with the front and back checks, the fabric is woven by a double-sided circular knitting machine through arrangement and combination of machine part triangles and knitting needles of a machine table, the fabric body is matched with 50-150D / 80-130F polyester composite filaments in a weaving manner, and the yarn length of inlet threads is adjusted, so that the finally woven fabric has concave-convex three-dimensional check texture on the front and back surfaces, attractive patterns and strong stereoscopic impression; and the fabric has the properties of good fluffiness, high resilience, comfortable hand feeling and good breathability.

The polyester based polymer composition includes a polyester, a metal oxide, and a metal hydroxide. The polymer composites contains the metal oxide and a metal hydroxide made from melting blending has good mechanical property as well as greater degradability after a required time in the higher temperatures and moisture of downhole conditions. The reinforced polymer composites with glass fibers, and the metal oxide and metal hydroxide made from melting blending has higher mechanical property as well as greater degradability after a required time in the higher temperatures and moisture of downhole conditions. The polymer composites made from melting blending have the required mechanical properties and the degradability so that the polymer composites can be used for degradable or dissolvable component of a downhole tool.

The present invention relates to a halogen-free flame-retardant reinforced polyester composite material with high hydrolysis resistance. The hydrolysis-resistant halogen-free flame-retardant reinforced polyester composite material of the present invention comprises a polyester resin, alkali-free glass fiber, a halogen-free flame retardant, an anti-hydrolysis agent, a buffer, an antioxidant, and a lubricant. The alkali-free glass fiber can improve the mechanical strength and impact resistance of the material. The hydrolysis-resistant halogen-free flame retardant, the anti-hydrolysis agent, and the buffer work together to obtain a polyester composite material with high hydrolysis resistance. The flame retardancy meets the UL-94 standard 0.4mm V-0 rating, and after storage in an 85°C / 85% RH environment for 2000 hours, the tensile strength retains 70%.

The invention discloses a preparation method of an ultrathin and super-hydrophilic polyamide-polyester composite nanofiltration membrane. According to the method, on the basis of a nano-scale sodium-based cyclodextrin metal-organic framework (U-Na-beta-CD-MOF) synthesized by a green ultrasonic strategy, accurate regulation and control on the structure and performance of a polyamide active layer are realized by regulating and controlling the diffusion behavior of a piperazine (PIP) monomer in an interfacial polymerization process. The preparation method comprises the following steps: S1, contacting a pretreated polyester porous support membrane with a water-phase solution, standing, enabling the water-phase solution to fully infiltrate the surface of the support membrane, and then removing redundant water-phase solution; s2, contacting the support membrane from which the water phase solution is removed in the step S1 with an organic phase solution under a low-temperature condition, standing, carrying out interfacial polymerization reaction, and removing the organic phase solution to form a polyamide active layer; and S3, cleaning the composite membrane obtained in the step S2, and carrying out curing or quenching treatment to obtain the ultrathin and super-hydrophilic polyamide-polyester composite nanofiltration membrane with the nano wrinkle structure. The water phase solution is a mixed solution of piperazine, sodium carbonate and a nanoscale sodium-based beta-cyclodextrin metal-organic framework; the invention provides an efficient, simple and controllable nanofiltration membrane preparation strategy, is suitable for efficient separation of pollutants and ions, and has a good application prospect.

The invention discloses a composite degradation accelerant, a controllable degradation polyester composite material and a preparation method of the controllable degradation polyester composite material. According to the invention, the halloysite-loaded degradation accelerant is used for coating the degradation bacterium spores to form a core-shell structure, so that the composite degradation accelerant is obtained, the thermal stability of the degradation bacterium spores is improved, and the degradation bacterium spores can be subjected to thermal processing with biodegradable polyester; through the synergistic effect of the composite degradation accelerant and the degrading bacteria, the biodegradation rate of the biodegradable material is regulated and controlled; the composite degradation accelerant and biodegradable polyester are blended and compounded, and the degradation rate is regulated and controlled through the design of the load rate and the raw material ratio, so that the problem of poor controllability of the degradation rate of the existing biodegradable material is solved; the production process is simple, and the existing biodegradable polyester modification production line is adopted, so that large-scale industrial production can be realized.

This invention discloses a method for preparing polyethylene / polyester composite fibers and their applications, belonging to the field of composite fiber technology. It solves the problems of poor compatibility, easy separation of the core and sheath, and poor mechanical properties in existing technologies. The method involves preparing polyethylene / polyester composite fibers by combining sheath and core materials using a core-sheath composite spinning process. The sheath material is polyethylene, and the core material is a blend of polyester and a compatibilizer. The compatibilizer is a graft copolymer of polyethylene and poly(ethylene-co-glycidyl methacrylate). The polyethylene / polyester composite fibers are then carded into a web, heat-dried, and shaped to form polyethylene / polyester composite fiber sheets. The areal density of the polyethylene / polyester composite fiber sheets is 17.8 g / m³. 2 The transverse breaking strength is 5.0~5.6N, and the longitudinal breaking strength is 30.7~35.3N. The preparation method of this invention can effectively reduce the separation and slippage of the core and sheath of polyethylene / polyester composite fibers, and the composite fiber flocs made from polyethylene / polyester composite fibers have excellent mechanical properties.

The invention relates to the technical field of polyester degradation, in particular to a selective depolymerization method of polyester in a polyester composite material. The selective depolymerization method comprises the following steps: carrying out a depolymerization reaction on a polyester composite material, a cosolvent, a depolymerization agent and a basic catalyst at normal pressure and a temperature not higher than 65 DEG C, the cosolvent is at least one of an ethylene glycol diether compound, a propylene glycol diether compound and an isobutyl ketone compound. According to the selective depolymerization method, an ethylene glycol diether compound, a propylene glycol diether compound and an isobutyl ketone compound are used as cosolvents, a depolymerization agent is used as a methylation reagent, and directional polyester depolymerization of a polyester composite material can be realized at normal pressure and the temperature not higher than 65 DEG C; when the polyester material is degraded, the non-polyester material is basically not degraded or depolymerized, and the selective depolymerization and separation of the polyester composite material such as a polyester blended fabric can be realized.

The invention relates to polylactic acid carbon dots as well as a PLA / PVA (polylactic acid / polyvinyl alcohol)-based full-biodegradable polyester composite material and a preservative film thereof. The polylactic acid carbon dots are prepared by a microwave irradiation method, and the full-biodegradable polyester composite material takes PLA as a main base material, PVA as auxiliary resin, food-grade talcum powder as a filler, the polylactic acid carbon dots as a compatilizer, glycerol and stearic acid as lubricants and B215 as an antioxidant. Performing high-speed mixing and stirring to obtain a modified mixture, extruding and pelletizing the modified mixture to obtain a full-biodegradable polyester composite material, and performing film blowing on the polyester composite material to obtain the full-biodegradable preservative film. The polyester composite material prepared by the invention can be biodegraded under a matured compost condition (the test period is 140 days), the biodegradation rate is 91.79%, the relative biodegradation rate is 97.15%, the products are carbon dioxide and water, and inspection items such as the total migration amount and heavy metals meet standard requirements.

The application relates to the technical field of high polymer materials, and discloses a high-hygroscopic polyester composite material and a preparation method thereof. The polyester composite material prepared by the application is prepared by taking PTT polyester and hygroscopic modified polyester as main raw materials and adding a toughening agent, an antioxidant, an ultraviolet absorber and a lubricant, and the fiber yarn prepared by using the polyester composite material has high hygroscopicity while keeping the breaking strength and elongation at break. Therefore, the fabric prepared by taking the composite material as raw material has excellent moisture regain and hygroscopicity.

The invention discloses preparation and application of a polyester composite material based on cassia anthraquinone, and belongs to the field of polymer synthesis and polymer composite materials. The synthesized high-molecular-weight polyester is mixed with an antioxidant 300 and a reinforcing agent carboxylated cellulose nanowhiskers for banburying processing to obtain a polyester-based composite material with good oxidation resistance and mechanical properties, and the polyester-based composite material is used for preparing edible oil cans, edible oil tanks and wine storage materials; polyester and white carbon black are mixed and processed to obtain a composite material with good mechanical property, flexibility and oil resistance, and the composite material is used for manufacturing storage and transportation materials containing gasoline, diesel oil, kerosene, lubricating oil and the like.

The present application relates to the technical field of corn fertilization, and provides a corn whole growth period precise fertilization method, which comprises the following steps: S1, applying base fertilizer containing nitrogen fertilizer, phosphorus fertilizer, potassium fertilizer, brown algal polysaccharide, calcium ammonium nitrate, zinc citrate, potassium humate and gamma-polyglutamic acid between corn rows when corn is sowed; S2, spraying leaf fertilizer containing potassium dihydrogen phosphate, magnesium sulfate, alginic acid and polyaspartic acid during the corn filling stage; the base fertilizer is slow-release fertilizer, and after granulation, the base fertilizer is coated with a polyester composite layer and a wax layer in sequence. According to the present application, the base fertilizer is made into double-layer coated slow-release particles and applied with sowing, the outer layer of furfural / wax forms a hydrophobic barrier to inhibit the burst release and salt damage during the seedling stage, and the inner layer of polyester composite layer forms controllable water channels and slowly hydrolyzes with time, so that nutrients are supplied in stages in a platform mode during the corn growth period, and precise fertilization and efficient utilization are achieved during the whole growth period.