41results about How to "Increase natural degradation rate" patented technology

The invention relates to a degradable polyester fiber and a preparation method thereof. The preparation method comprises the steps that modified polyester FDY filament is prepared from modified polyester melt according to an FDY process, and the degradable polyester fiber is obtained; the molecular chain of the modified polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment, a 2,5,6,6-tetramethyl-2,5-heptanediol chain segment and a fluorine-containing dicarboxylic acid chain segment; fluorine-containing dicarboxylic acid is 2,2-difluoro-1,3-malonic acid or 2,2-difluoro-1,4-succinic acid or 2,2-difluoro-1,5-glutaric acid or 2,2,3,3-tetrafluoro-1,4-succinic acid; modified ZrO2 doped powder is dispersed in modified polyester. After the obtained product is placed for 60 months on the conditions that the temperature is 25 DEG C, and the relative humidity is 65%, the intrinsic viscosity is lowered by 23-28%. The preparation method is low in cost and simple inprocess; the prepared product is high in natural degradation rate, and has great application prospects.

The invention relates to a cationic-dyeable polyester fiber and a preparation method thereof. The preparation method comprises the following steps: preparing cationic modified polyester FDY filamentsfrom cationic modified polyester melt according to an FDY process, thereby obtaining the cationic-dyeable polyester fiber. The molecular chains of the cationic modified polyester comprise terephthalicacid segments, ethylene glycol segments, sodium m-phthalate sulfonate segments and dihydric alcohol segments with tert-butyl side groups; the structural formula of the dihydric alcohol with tert-butyl side groups is as shown in the specification; and solid heteropoly acid powder subjected to high-temperature roasting is dispersed in the cationic modified polyester. The prepared product has dye-uptake of 87.8-92.2% under the temperature condition of 120 DEG C and the K/S value of 23.27-25.67; and after the product is placed under the conditions that the temperature is 25 DEG C and the relativehumidity is 65% for 60 months, the intrinsic viscosity is reduced by 13-17%. According to the preparation method disclosed by the invention, the addition amount of the third monomer is small, the cost is low, and the process is simple; and the prepared product is excellent in dyeing property and national degradation property.

The invention relates to moisture absorbing and sweat releasing polyester fibers and a preparation method thereof. The preparation method comprises the following step: preparing polyester FDY yarns from a polyester melt according to a FDY process by using a cross-shaped spinneret plate to obtain the moisture absorbing and sweat releasing polyester fibers, wherein doped and modified ZrO powder is dispersed in the polyester melt. The doping and modifying process comprises the following steps: first, mixing a solution containing metal ions Mx<+> and a solution containing Zr4<+> uniformly; then dropwise adding a precipitator till the pH value of the solution is 9-10; and finally, calcining the precipitated product, wherein the metal ions Mx<+> are more than one of Mg2<+>, Li<+> and Zn2<+>. Thecross sections of the prepared moisture absorbing and sweat releasing polyester fibers are cross-shaped. The intrinsic viscosity of the moisture absorbing and sweat releasing polyester fibers is reduced by 10-16% if being placed for 60 months under the condition that the temperature of the moisture absorbing and sweat releasing polyester fibers is 25 DEG C and the relative humidity is 65%. The preparation method is simple in process and low in price. The prepared product is high in natural degrading speed, excellent in mechanical property and moisture absorbing and sweat releasing property, and has a good application prospect.

The invention relates to a feather-like polyester fiber and a preparation method thereof. The preparation method comprises the steps: firstly, terephthalic acid, ethylene glycol, dihydric alcohol witha main chain containing silicon, and fluorinated diacid are evenly mixed, and then an esterification reaction and a polycondensation reaction are carried out successively to prepare modified polyester; and then a modified polyester POY filament is prepared from modified polyester flux through a flat four-linking-ring-shaped spinneret plate according to a POY process, then a modified polyester DTYfilament is prepared from the modified polyester POY filament according to a DTY process, and then the feather-like polyester fiber is obtained. Spinneret orifices of the flat four-linking-ring-shaped spinneret plate are in a flat four-linking-ring shape. According to a prepared product, when the temperature is 130 DEG C, the dye-uptake is 89.6-93.7%; when the temperature is 25 DEG C and the relative humidity is 65%, after the product is placed for 60 months, the intrinsic viscosity of the product is lowered by 13-20%; and the preparation method is simple in process and low in cost, and the prepared product is excellent in dyeing property and high in natural degradation speed, and has good application prospects.

The invention relates to a flame-retardant polyester fiber and a preparation method thereof. The preparation method includes the step that modified polyester FDY yarn, namely the flame-retardant polyester fiber, is prepared from a modified polyester melt according to the FDY process. A preparation method of modified polyester comprises the step that terephthalic acid, ethylene glycol, 2-CEPPA, 2,5,6,6-tetramethyl-2,5-heptandiol and doped modified Bi2O3 powder are evenly mixed and subjected to an esterification reaction and a polycondensation reaction in sequence, wherein the structural formulaof 2,5,6,6-tetramethyl-2,5-heptandiol is shown in the description. The dye-uptake of the prepared product is 85.3-89.2% under the temperature condition of 120 DEG C, and the K/S value is 22.35-25.43;after the product is placed for 60 months under the condition that the temperature is 25 DEG C and the relative humidity is 65%, the characteristic viscosity of the product is reduced by 13-18%. Thepreparation method is low in cost and simple in process; the prepared product has excellent dyeing property and natural degradability.

The invention relates to a semi-dull polyester drawn yarn and a preparing method thereof. The preparing method includes the step of repairing the semi-dull polyester drawn yarn from modified polyestermelt through an FDY process. A preparing method of modified polyester includes the steps of evenly mixing phthalic acid, ethylene glycol, dibasic alcohol with silicon in the main chain, fluorinated dibasic acid, a matting agent and doped and modified Bi2O3 powder, and sequentially conducting esterification reaction and condensation polymerization reaction, wherein the fluorinated dibasic acid is2,2-difluoro-1,3-malonic acid, 2,2-difluoro-1,4-succinic acid, 2,2-difluoro-1,5-glutaric acid or 2,2,3,3-tetrafluoro-1,4-succinic acid. The prepared product has the dye-uptake of 87.5-91.8% under thetemperature condition of 120 DEG C, and the specific viscosity of the product is reduced by 18-26% after the product is placed under the temperature of 25 DEG C and the relative humidity of 65% for 60months. The preparing method is simple in process, and the prepared product is good in dyeing and degrading performance.

The invention relates to melt direct-spinning online added colored polyester fibers and a preparation method thereof. The preparation method comprises the following steps: combining a melt direct-spinning online adding process with a FDY process and preparing the melt direct-spinning online added colored polyester fibers from a modified polyester melt according to the combined process; and addingcolor masterbatch online into the modified polyester melt in the melt direct-spinning process, wherein the prepared melt direct-spinning online added colored polyester fibers are modified polyester FDY yarns, and molecular chains of the modified polyester comprise a terephthalic acid chain section, an ethylene glycol chain section, a binary acid chain section with a tertiary butyl side group, a fluorine-containing binary acid chain section and a 2,5,6,6-tetramethyl-2,5-heptandiol chain section. The preparation method is simple. By modifying the polyester by means of the fluorine-containing binary acid, the binary acid with the tertiary butyl side group and the 2,5,6,6-tetramethyl-2,5-heptandiol, the hydrolysis rate of the polyester is improved, the natural degrading performance of the polyester fibers is improved, and the prepared product is excellent in mechanical property.

The invention relates to a moisture-absorbing and sweat-releasing polyester fibre and a preparation method thereof. The preparation method comprises the following steps: adopting an H-shaped spinneretplate to prepare modified polyester FDY filaments from modified polyester melt according to an FDY process, thereby obtaining the moisture-absorbing and sweat-releasing polyester fibre. The preparation method for modified polyester comprises the following steps: sequentially performing esterification reaction and polycondensation reaction after terephthalic acid, glycol, hexylene glycol with a tertiary butyl side group and doped modified ZrO2 powder are uniformly mixed. A structural formula of the hexylene glycol with the tertiary butyl side group is as follows: the formula is shown in the description. The prepared product has a dyeing rate of 86.7-90.2% under a temperature condition of 120 DEG C, and has a K/S value of 22.58-25.72; after being placed for 60 months under conditions with atemperature of 25 DEG C and relative humidity of 65%, intrinsic viscosity of the moisture-absorbing and sweat-releasing polyester fibre is reduced by 14-21%. The preparation method disclosed by the invention is low in cost and is simple in process; and the prepared product is excellent in dyeing performance, is quick in natural degradation rate, and has a promising application prospect.

The invention relates to modified polyester fibers containing a solid base catalyst and a preparation method thereof. The preparation method includes the steps that according to a POY technology, after modified polyester melts are prepared into modified polyester POY filaments, and then according to a DTY technology, the modified polyester POY filaments are processed and prepared into the modifiedpolyester fibers containing the solid base catalyst; a modified polyester molecular chain comprises a terephthalic acid chain segment, an ethylene glycol chain segment and 2,5,6,6-tetramethyl-2,5-heptanediol chain segment, the structural formula of 2,5,6,6-tetramethyl-2,5-heptanediol is shown in the specification, and solid base catalyst powder which is roasted at high temperature and doped and modified Sb2O3 powder are dispersed in modified polyesters. After the prepared product is put for 60 months under the conditions that the temperature is 25 DEG C and relative humidity is 65%, the intrinsic viscosity is decreased by 18-24%. The preparation method is low in cost and simple in technology; the prepared product is high in natural degrading rate and has broad application prospects.

The invention relates to complete extinction dacron pre-orientated yarns and a preparation method thereof. The preparation method comprises the following step: preparing modified polyester POY yarns from a modified polyester melt according to a POY process to obtain the complete extinction dacron pre-orientated yarns; the preparation method of the modified polyester comprises the following steps:uniformly mixing terephthalic acid, ethylene glycol, 2,5,6,6-tetramethyl-2,5-heptandiol, fluorine-containing binary acid with a tertiary butyl side group, an extinction agent, dihydric alcohol with silicon on main chain, an extinction agent and multiphase solid acid-base powder roasted at a high temperature; and successively carrying out esterification reaction and polycondensation, wherein the multiphase solid acid-base is SiO2-Al2O3 and/or SiO2-MgO. The dye-uptake of a prepared product is 88.3-91.7% at a temperature of 125 DEG C, and the intrinsic viscosity of the product placed for 60 months at a temperature of 25 DEG C and relatively humidity of 65% is reduced by 16-20%. The preparation method is simple in process. The prepared product is good in dyeing performance and natural degrading performance.

The invention relates to a polyester and nylon sheath core composite filament and a preparation method thereof. The method comprises the following steps: uniformly mixing terephthalic acid, ethylene glycol, fluorine-containing binary acid and multi-phase solid acid-base powder which is roasted at a high temperature, and sequentially performing esterification and condensation polymerization to prepare modified polyester; preparing the polyester and nylon sheath core composite filament by using nylon and modified polyester as a sheath material and a core material by adopting a sheath-core compound spinning method according to the FDY process, wherein the high-temperature roasted multi-phase solid acid-base powder is dispersed in the nylon, and the multi-phase solid acid-base is SiO2-Al2O3 and/or SiO2-MgO; after the product is placed for 60 months at the temperature of 25 DEG C and the relative humidity of 65 percent, the sheath intrinsic viscosity is reduced by 13-18 percent, and the core intrinsic viscosity is reduced by 12-16 percent. The method has a simple process, and the polyester-nylon sheath-core composite filament has high natural degradation efficiency.

The invention relates to the technical field of hydraulic oil, and particularly discloses anti-wear hydraulic oil and a production process thereof. The formula of the anti-wear hydraulic oil comprises the following raw materials in parts by weight: 90-110 parts of degradable base oil, 1-2 parts of a preservative, 1-2 parts of an antioxidant, 2-4 parts of polyethylene glycol and 2-4 parts of alkaline carclazyte, wherein the degradable base oil is prepared by compounding vegetable oil and mineral oil. The polyethylene glycol and the alkaline carclazyte have a synergistic effect, so that the possibility of degradation of the anti-wear hydraulic oil in the use process is reduced, and the service life of the anti-wear hydraulic oil is prolonged.

The invention provides a preparation method of a high-performance bio-based water and fertilizer slow-release material, which comprises the following steps: pulverizing a certain mass of plant straw into particles, adding the particles into a prepared strong alkali solution under stirring, and performing reacting at a certain temperature to obtain an alkaline liquid mixture; then adding a certain mass of inorganic porous material into the alkaline liquid mixture, performing stirring, finally mixing organic amide, humic acid, organic acid and a metal inorganic salt initiator according to a certain proportion, adding the mixture into the alkaline liquid mixture, and continuously performing reacting at a certain temperature; and taking out the reacted mixture, and performing drying to obtain the high-performance bio-based water and fertilizer slow-release material. On the basis of existing research, the preparation process of the bio-based high-water-absorptivity water-fertilizer slow-release material is optimized, the preparation method which is easy to operate, easy to control, low in cost and efficient in yield is obtained, and the preparation method is particularly suitable for meeting the requirement for application and popularization of the water-fertilizer slow-release material in agricultural production.