51results about How to "Change bond angle" patented technology

The invention relates to a polyester flax-like type different shrinkage composite yarn and a preparation method thereof. Firstly, a modified polyester yarn POY and a modified polyester yarn FDY are prepared respectively, then the modified polyester yarn POY and the modified polyester yarn FDY are compounded to prepare the polyester flax-like type different shrinkage composite yarn; the chromatic aberration [delta]E of the prepared polyester flax-like type different shrinkage composite yarn is less than 0.200; a bundle of the yarn POY or FDY extruded by a same spinneret plate contains a singleyarn shaped in a Chinese character 'wang' manner and a five-leaf single yarn; a molecular chain of modified polyester consists of a diol chain segment with a branched chain, and diol with the branchedchain has the structural formula defined in the specification, wherein R1 and R2 are straight-chain alkylene with the carbon atom number of 1-3 , R3 is alkyl with the carbon atom number of 1-5, and R4 is alkyl with the carbon atom number of 2-5. The method is simple and reasonable, and the prepared composite yarn has good fluffy property and moisture absorption and perspiration elimination properties.

The invention relates to a high-extension and low-shrinkage polyester industrial filament and a preparation method thereof. Modified polyester is subjected to solid phase polycondensation tackifying,melting, metering, extrusion, cooling, oiling, stretching, heat setting and winding to obtain the high-extension and low-shrinkage polyester industrial filament, wherein the high-extension and low-shrinkage polyester industrial filament is made of the modified polyester, and a molecular chain of the modified polyester consists of a terephthalic acid chain segment, an ethylene glycol chain segmentand a diol chain segment with a branched chain; the central value of elongation at break of the finally prepared high-extension and low-shrinkage polyester industrial filament is 11.0-12.0%, and the dry-hot shrinkage rate under the conditions of 177 DEG C, 10 min and 0.05 cN / dtex is 6.5-13.5%. The method is simple and reasonable, and the prepared high-extension and low-shrinkage polyester industrial filament has the advantages of good mechanical properties, high elongation at break and low dry-hot shrinkage, and has excellent popularization value.

The invention relates to a polyester wool-like different-shrinkage composite wire and a preparing method thereof. The method comprises the steps of firstly, modified polyester POY and FDY wires are produced separately; then, the POY and FDY wires are compounded to produce the polyester wool-like different-shrinkage composite wire, wherein the chromatic aberration delta E of the produced compositewire is smaller than 0.200. A bunchof POY or FDY wires extruded through the same spinneret plate contain double-cross single wires and trilobal single wires simultaneously, a modified polyestermolecular chain contains a dihydric alcohol chain section with a branch chain, and the structural formula of the dihydric alcohol chain section with the branch chain is shown in the description, wherein R1 and R2 are straight chain alkylidenes of which the number of carbon atoms is 1-3, R3 is an alkyl of which the number of carbon atoms is 1-5, R4 is an alkyl of which the number of carbon atoms is 2-5, and a matt agent in modified polyester is a mixture of amorphous titanium dioxide and amorphous silicon dioxide or calcium carbonate and amorphous silicon dioxide. The preparing method is simple and reasonable, and the prepared composite wire has good fluffy and hygroscopic and sweat releasingperformance.

The invention relates to modified polyester and a preparation method thereof. Terephthalic acid, ethylene glycol and dihydric alcohol with branched chains are uniformly mixed and are then sequentiallysubjected to esterification reaction and condensation polymerization to obtain the modified polyester, wherein the dihydric alcohol with branched chains has the structural formula shown in the description; in the formula, R1 and R2 respectively and independently select straight chain alkylidene with the carbon number being 1 to 3; R3 selects alkyl with the carbon number being 1 to 5; R4 selects alkyl with the carbon number being 2 to 5. The molecular chain of the finally prepared modified polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment and a dihydric alcohol chain segment with branched chains; the content of annular low polymers in the modified polyester is smaller than or equal to 0.6 weight percent. The method has the advantages that the content of the annular low polymers in the modified polyester can be obviously reduced; the influence on the performance of the polyester pre se cannot be caused; the prepared modified polyester has high molecular weight; the distribution is narrow; good popularization values are realized.

The invention relates to super-low shrinkage type sun shading cloth and a preparation method thereof. A super-low shrinkage polyester industrial filament is prepared by solid phase polycondensation tackifying, melting, metering, extrusion, cooling, oiling, stretching, heat setting and winding of modified polyester and then is woven to obtain a fabric layer; the fabric layer is subjected to two-dipping and two-rolling coating to synthesize polyurethane resin; the polyurethane resin is dried and baked to obtain the super-low shrinkage type sun shading cloth; when the sun shading cloth is cooled,the vertical height is kept unchanged and the cross section area of a slow cooling chamber is increased; at the same time, the slow cooling chamber maintains the plate surface temperature of a spinneret plate by the way of heat preservation. An oil agent for oiling contains crown ether, and the fabric layer is made of modified polyester having a molecular chain including a terephthalic acid chainsegment, an ethylene glycol chain segment and a diol chain segment with a branched chain. The preparation method is simple, the finally prepared super-low shrinkage type sun shading cloth has the dryhot-shrinkage rate of 2.2+ / -0.35% under the conditions of 190 DEG C, 15 min and 0.01 cN / dtex, and the mechanical properties are good.

The invention relates to a low-shrinkage activated polyester industrial yarn and a preparation method thereof. The preparation method comprises: carrying out solid phase condensation polymerization tackifying on a modified polyester, melting, metering, extruding, cooling, oiling, drawing, carrying out heat setting, oiling with an activated oil agent, winding, and carrying out pre-activation treatment, wherein the oil agent for oiling contains crown ether, the content of the crown ether is 67.30-85.58 wt%, and the material of the prepared polyester industrial yarn is the modified polyester withthe molecular chain including a terephthalic acid chain segment, an ethylene glycol chain segment and a diol chain segment having the branched chain. According to the present invention, the preparation method is simple and reasonable; and the dry heat shrinkage rates of the finally obtained low-shrinkage activated polyester industrial yarn respectively are 5.5+ / -0.8% and 2.8-5.8% at the conditions comprising 177 DEG C, 10 min and 0.05 cN / dtex and the conditions comprising 190 DEG C, 15 min and 0.01 cN / dtex, and the wicking height is less than or equal to 5 mm.

The invention relates to a superfine dacron low stretch yarn and a preparation method thereof. Modified polyester fusant is subjected to metering, extrusion, cooling, oiling and winding to prepare POYyarns; the POY yarns are subjected to yarn guide tube passing, networking, heating stretching, false twisting, heat setting and winding formation to prepare DTY yarns, i.e., the superfine dacron lowstretch yarn is obtained. During cooling, the longitudinal height is kept unchanged; the cross section area of a slow cooling chamber is increased; meanwhile, the slow cooling chamber maintains the plate surface temperature of a spinneret plate in a heat insulation mode; an oil agent for oiling contains crown ether; the content of the crown ether is 67.30 to 85.58 weight percent; the dihydric alcohol chain segment with branched chain is introduced into modified polyester; the prepared superfine dacron low stretch yarn has the filament number being smaller than 0.3dtex; the crimp shrinkage is 8.0+ / -1.0 percent; the crimp stability is greater than or equal to 75 percent. The method is simple and reasonable; the prepared superfine dacron low stretch yarn has the advantage of low fiber number.

The invention relates to a method for decomposing water into a hydrogen-oxygen mixed gas fuel, which comprises the following steps: 1, vaporization: inputting water into a vapor generator, and vaporizing the water to form dry vapor; 2, catalysis: feeding the obtained dry vapor into a catalytic converter, wherein the dry vapor is activated by a manganese metal catalyst in the catalytic converter; 3, electric shock: feeding the activated dry vapor into a discharger to obtain a hydrogen-oxygen mixed gas of which the hydrogen-oxygen volume ratio is 2:1 and a small amount of dry vapor not subject to electric shock; and 4, separation of gas and water: passing the obtained hydrogen-oxygen mixed gas and the dry vapor not subject to electric shock through a gas-water separator to filter the dry vapor, thus obtaining the hydrogen-oxygen mixed gas. By using the method, water can be decomposed into the hydrogen-oxygen mixed gas which can be a new energy replacing fossil fuels, thereby achieving the purposes of energy conservation and emission reduction.

The invention relates to an ultra-fine denier polyester drawn yarn and a preparation method thereof. A modified polyester is subjected to metering, extruding, cooling, oiling, stretching, heat settingand winding to obtain the ultra-fine denier polyester drawn yarn. An oiling agent used for oiling contains crown ether, and content of the crown ether is 67.30 to 85.58wt%. A modified polyester molecular chain includes a terephthalic acid chain segment, an ethylene glycol chain segment and a dihydric alcohol chain segment with a branched chain. A structural formula of the ethylene glycol with thebranched chain is as follows: the structural formula is shown in the description. R1 and R2 are each independently selected from straight-chain alkylene groups with 1 to 3 carbon atoms, R3 is selected from alkyl groups with 1 to 5 carbon atoms, and R4 is selected from alkyl groups with 2 to 5 carbon atoms, and the resulting ultra-fine denier polyester drawn yarn is obtained. The single-filament fineness of the ultra-fine denier polyester drawn yarn is 0.2 to 0.3 dtex. The method is simple and reasonable, and the prepared ultra-fine denier polyester drawn yarn is soft and delicate, and has high quality.

The invention relates to a polyester large-aperture conveyor belt and a preparation method thereof. According to the preparation method, high-strength polyester industrial yarns are obtained through solid phase polycondensation tackifying, melting, metering, extruding, cooling, oiling, stretching, heat setting and winding of the modified polyester, are then twisted and woven together to obtain a fabric layer, the fabric layer is coated with a synthetic polyurethane resin by two dipping and two rolling, and dried and baked to obtain the polyester large-aperture conveyor belt. An oiling agent used for oiling contains crown ether. The content of the crown ether is 67.30 to 85.58 wt%. The preparation method of the invention is simple and reasonable, and texture of the fabric layer of the polyester large-aperture conveyor belt finally obtained is a modified polyester with a molecular chain including a terephthalic acid chain segment, a glycol chain segment and a dihydric alcohol chain segment with g a branched chain, the breaking strength of the polyester large-aperture conveyor belt is equal to or more than 2900N, water pressure resistance is equal to or more than 100KPa, peel strengthis equal to or more than 9.0N / cm, when friction is equal to or more than 3500 times, coating does not change, and when temperature is equal to or less than -30 DEG C, the coating is crack-free.

The invention relates to polyester HOY fibers and a preparation method thereof. The preparation method comprises the steps of carrying out metering, extrusion, cooling, oiling and high-speed winding of a modified polyester melt to obtain the polyester HOY fibers, wherein the high-speed winding speed of the high-speed winding is more than or equal to 6000 m / min; during cooling, the vertical heightis kept unchanged and the cross section area of a slow cooling chamber is increased; at the same time, the slow cooling chamber maintains the plate surface temperature of a spinneret plate by the wayof heat preservation. The fibers are made of modified polyester having a molecular chain including a terephthalic acid chain segment, an ethylene glycol chain segment and a diol chain segment with a branched chain, and diol with the branched chain has the structural formula described in the specification, wherein R1 and R2 are independently selected from straight-chain alkylene with the carbon atom number of 1-3 , R3 is selected from alkyl with the carbon atom number of 1-5, and R4 is selected from alkyl with the carbon atom number of 2-5; the chromatic aberration [delta]E of the prepared fibers is less than 0.200. The method is simple and reasonable in preparation process, and the prepared fibers have good properties.

The invention relates to a high-modulus low-shrinkage stiff cord and a preparation method thereof. The preparation method comprises the following steps: performing solid-phase polycondensation-viscosity enhancement, melting, metering, extrusion, cooling, oiling, stretching, heat setting and winding to obtain high-modulus and low-shrinkage polyester industrial yarns; twisting to obtain a cord; making the cord into a high-modulus low-shrinkage stiff cord by a two-bath impregnation method, wherein during cooling, the longitudinal height is kept constant and the cross-sectional area of a slow cooling chamber is increased; meanwhile, the surface temperature of a spinneret plate is kept in a heat preserving way in the slow cooling chamber; an oiling agent contains 67.30 to 85.58 percent by weight of crown ether; during use of the oiling agent, 14 to 18 percent by weight emulsion is prepared with water. The preparation method disclosed by the invention is simple; the prepared high-modulus low-shrinkage stiff cord is made from modified polyester of which the molecular chain includes a terephthalic acid chain segment, an ethylene glycol chain segment and a dihydric alcohol chain segment with a branched chain, is greater than or equal to 80N in breaking strength, and is greater than or equal to 37KN / m in cord bonding strength.