Summary of the invention
The objective of the invention is to overcome the deficiency of above-mentioned existence, and provide a kind of have good moisture absorption, perspire, airing function, can be widely used in fields such as underwear, sportswear, bedding, can regulate the relation between the moisture content and humidity between underclothes and skin surface (weather in the clothes), the sense of touch that had both had cotton products, the micropore polyester fibre of the salubrious dry sensation of tool and preparation method again.
The objective of the invention is to finish by following technical solution, it is made up of conventional resin and water-soluble modified polymer resin, and they are in 70~50%: the even blend of 30~50% ratios, and after dissolving the water-soluble modified polymer resin of 8-12% behind the melt spinning, make, its surface and inside are evenly distributed with the micropore that a large amount of diameters are about 0.5~2um aperture.
Described water-soluble modified polymer resin has soluble water-soluble polymer in 100 ℃ of boiling water, behind the long filament of making behind it and even blend of conventional resin and the melt spinning, in 100 ℃ hot water, dissolve 10% back and constitute micropore polyester fibre of the present invention.Described water-soluble modified polymer resin is mainly represented by following structure, about 245 ℃ of fusing points.
Described water-soluble modified polymer resin is to be two bases with terephthalic acid (TPA), ethylene glycol, with the two hydroxyl ethyl esters of M-phthalic acid-5-sulfonate or M-phthalic acid-5-sulfonate as the 3rd component, with polyethylene glycol (PEG) as the 4th component, adopt " direct esterification method " process route, also add other components such as M-phthalic acid, hexanedioic acid or its ester in the reaction system.
A kind of preparation method of aforesaid micropore polyester fibre, it adopts a kind of water-soluble polymer can be water-soluble, that have good moisture pick-up properties and ionic conductance performance, as the molten component of going, be ground into 75-85 purpose fine particle after being dried, with onesize normal polyester particle in 30~50%: the even blend of 70~50% ratios, extruding pelletization on double screw extruder; To melt spinning, stretching after the master batch drying of having made, and this long filament dissolved 55-65 minute in hot water after, the dissolving weight-loss ratio reaches 8-12%, pull oven dry out, make still to keep 20~40% water-soluble copolymer component in the fiber, the surface and inner be evenly distributed with a large amount of diameters be about 0.5~2um aperture micropore, have excellent moisture absorption, a fiber of permeability.
The present invention adopts a kind of soluble water-soluble polymer in 100 ℃ of boiling water that has, and is ground into the fine particle about 80 orders after being dried, with onesize normal polyester particle evenly blend in proportion, extruding pelletization on double screw extruder; To melt spinning, stretching after the master batch drying of having made, and this long filament dissolved 60 minutes in 100 ℃ hot water after, the dissolving weight-loss ratio reaches 10%, pulls oven dry out.
The present invention compared with prior art, have good moisture absorption, perspire, airing function, can be widely used in fields such as underwear, sportswear, bedding, can regulate the relation between the moisture content and humidity between underclothes and skin surface (weather in the clothes), the sense of touch that had both had cotton products, again the salubrious dry sensation of tool etc. characteristics.
The specific embodiment
The present invention will be described in detail below in conjunction with specific embodiment: micropore polyester fibre of the present invention is made up of conventional resin and water-soluble modified polymer resin, and they are in 70~50%: the even blend of 30~50% ratios, and after dissolving the water-soluble modified polymer resin of 8-12% behind the melt spinning, make, its surface and inside are evenly distributed with the micropore that a large amount of diameters are about 0.5~2um aperture.
Described water-soluble modified polymer resin has soluble water-soluble polymer in 100 ℃ of boiling water, behind the long filament of making behind it and even blend of conventional resin and the melt spinning, in 100 ℃ hot water, dissolve 10% back and constitute micropore polyester fibre of the present invention.
Described water-soluble modified polymer resin is mainly represented by following structure, about 245 ℃ of fusing points.
Described water-soluble modified polymer resin is to be two bases with terephthalic acid (TPA), ethylene glycol, with the two hydroxyl ethyl esters of M-phthalic acid-5-sulfonate or M-phthalic acid-5-sulfonate as the 3rd component, with polyethylene glycol (PEG) as the 4th component, adopt " direct esterification method " process route, also add other components such as M-phthalic acid, hexanedioic acid or its ester in the reaction system.
Added the 3rd, the 4th a large amount of monomers among the present invention in the WSPET polymerization process, slice surface is clamminess easily, is very easy to be bonded to piece, contains sulfonic acid group in the section simultaneously, is not easy drying, so adopt the dynamic vacuum drying; Its drying process is:
A. cold conditions charging, dry initial temperature are controlled at below 50 ℃;
B. the pre-crystallization stage heating rate of strict control guarantees that pre-crystallization fully finishes;
C. 24 hours drying times, dry back water-soluble polymeric water content of matter is below 50ppm.
A kind of preparation method of aforesaid micropore polyester fibre, it adopts a kind of water-soluble polymer can be water-soluble, that have good moisture pick-up properties and ionic conductance performance, as the molten component of going, be ground into 75-85 purpose fine particle after being dried, with onesize normal polyester particle in 30~50%: the even blend of 70~50% ratios, extruding pelletization on double screw extruder; To melt spinning, stretching after the master batch drying of having made, and this long filament dissolved 55-65 minute in hot water after, the dissolving weight-loss ratio reaches 8-12%, pull oven dry out, make still to keep 20~40% water-soluble copolymer component in the fiber, the surface and inner be evenly distributed with a large amount of diameters be about 0.5~2um aperture micropore, have excellent moisture absorption, a fiber of permeability.
The present invention adopts a kind of soluble water-soluble polymer in 100 ℃ of boiling water that has, and is ground into the fine particle about 80 orders after being dried, with onesize normal polyester particle evenly blend in proportion, extruding pelletization on double screw extruder; To melt spinning, stretching after the master batch drying of having made, and this long filament dissolved 60 minutes in 100 ℃ hot water after, the dissolving weight-loss ratio reaches 10%, pulls oven dry out.
After water-soluble polymer drying of the present invention, the cooling, on plastic crusher, it is ground into the powder (being called the A component among the present invention) about 80~120 orders.
Also use normal polyester among the present invention, after its crystallization, drying, cooling, be ground into the powder (being called the B component among the present invention) about 80~120 orders.
With A and two kinds of components of B according to weight ratio 30~50%: 70~50% ratio is evenly mixed in mixer; utilize the cold pelleter of SJSH-30 double screw extruder and XPLQ-100 to be made into the master batch that particle diameter is 3~5mm then, its preparation technology is as shown in table 1 below:
Each reaction zone temperature of table 1, pressure
The master batch that contains 30~50% fine water soluble ingredients for preparing, with above-mentioned same drying means drying, use the melt spinning machine spinning, master batch at first is transferred and preheating at feed zone after entering screw rod from barrel, the compressed section compacting that continues, exhaust and fusing gradually, in metering section, further mix plasticizing then, and reach uniform temperature, and be quantitatively transferred to the measuring pump accurate measurement with certain pressure, form long filament by filament spinning component.Adopt the parallel drafting machine that the above-mentioned fiber that is spun into is carried out 1.5 times of drawing-offs then.
The fiber of preparation was placed in 100 ℃ the hot water dissolving 60 minutes, after the drying, the weight-loss ratio of fiber (weight deducts dissolving back weight before the dissolving, again divided by weight before the dissolving) reaches 10%, the micropore in surface and inner 0.5~2um aperture that evenly distributes, fiber suction and permeability are good.
Embodiment 1: the present invention adopts leaching to prepare micropore polyester fibre, be ground into 80 purpose fine particles after the polymer drying with water-soluble modified dose of interpolation, with onesize normal polyester particle in even blend of ratio in 30%: 70%, extruding pelletization on double screw extruder, to the master batch of having made that contains water soluble ingredient, dry back melt spinning, stretch, this long filament dissolved 60 minutes in 100 ℃ hot water after, the dissolving weight-loss ratio reaches 10%, pull oven dry out, by showing behind the testing electronic microscope, this fiber surface and a large amount of diameters of inner generation are about the micropore in 0.5~2um aperture, owing to still keep 20% hydrophily good water-solubility polymers compositions in the fiber, surface and inner micropore with a large amount of 0.5~2um apertures have good moisture absorption, permeability.
Embodiment 2: the present invention adopts leaching to prepare micropore polyester fibre, be ground into 85 purpose fine particles after the polymer drying with water-soluble modified dose of interpolation, with onesize normal polyester particle in the even blend of 50%:50% ratio, extruding pelletization on double screw extruder, to the master batch of having made that contains water soluble ingredient, dry back melt spinning, stretch, this long filament dissolved 55 minutes in 100 ℃ hot water after, the dissolving weight-loss ratio reaches 8%, pull oven dry out, by showing behind the testing electronic microscope, this fiber surface and a large amount of diameters of inner generation are about the micropore in 0.5~2um aperture, owing to still keep 40% hydrophily good water-solubility polymers compositions in the fiber, surface and inner micropore with a large amount of 0.5~2um apertures have good moisture absorption, permeability.
Embodiment 3: the present invention adopts leaching to prepare micropore polyester fibre, be ground into 75 purpose fine particles after the polymer drying with water-soluble modified dose of interpolation, with onesize normal polyester particle in even blend of ratio in 40%: 60%, extruding pelletization on double screw extruder, to the master batch of having made that contains water soluble ingredient, dry back melt spinning, stretch, this long filament dissolved 65 minutes in 100 ℃ hot water after, the dissolving weight-loss ratio reaches 12%, pull oven dry out, by showing behind the testing electronic microscope, this fiber surface and a large amount of diameters of inner generation are about the micropore in 0.5~2um aperture, owing to still keep 30% hydrophily good water-solubility polymers compositions in the fiber, surface and inner micropore with a large amount of 0.5~2um apertures have good moisture absorption, permeability.