TW201728691A - Soft fibre and fabric thereof - Google Patents

Abstract

Disclosed is a soft fibre, which is mainly composed of a thermoplastic polymer. The fibre contains a natural vegetable grease accounting for 0.1-15 wt% of the fibre, and the melting point of the natural vegetable grease is not higher than 0 DEG C, and the boiling point is not less than 200 DEG C, and the natural vegetable grease contains oleic acid and squalene. A fabric prepared from the fibre of the present invention has a good softness and a particularly glutinous tactile feeling.

Description

Soft fiber and fabric thereof

The present invention relates to a soft fiber and a woven fabric thereof, and more particularly to a soft fiber comprising a thermoplastic polymer as a main raw material and containing natural vegetable oil and a woven fabric thereof.

With the improvement of people's living standards, people are increasingly demanding synthetic fiber garments, not only to be beautiful and comfortable to wear, but also to provide other functions such as softness and moisture absorption properties such as natural fiber. Environmentally friendly features to make synthetic fabrics meet the needs of people in terms of functionality. Natural oil is the main product obtained by plant extracting and refining. It is a liquid environmentally-friendly oil. The refined essential oil has moisturizing, moisturizing and beauty effects on human skin. The edible oil can prevent cardiovascular diseases and regulate the blood lipid concentration. The application of natural vegetable oil to textiles can improve the softness of the fabric, but there are always problems such as low boiling point, smoking, and poor dispersion in application.

In practice, natural vegetable oils and fats can be added to the post-processing finishing agent, and the natural vegetable oils can be coated on the fabric through stereotypes during the post-processing of the fabric, but the defects of this method are on the fabric. The natural vegetable oil and fat coating is easy to peel off after repeated washing and has poor durability. In other methods, natural vegetable oils and fats are added directly during the polymerization or kneading process. However, because of the low boiling point, heat resistance, and thermal decomposition of the oils and fats, only high concentrations such as polylactic acid and polypropylene having a low melting point can be added. In the subpolymer. Although Chinese patent CN103547619A discloses the addition of natural fats and oils to various polyesters, in the specific implementation, only polypropylene and natural oil blends are used, and high melting point polymers such as nylon and polyethylene terephthalate cannot be used. Addition of esters and the like, the application range is limited.

It is an object of the present invention to provide a fiber which is mainly composed of a thermoplastic polymer and which contains natural vegetable oil and fat and which has excellent flexibility.

The above fiber is mainly composed of a thermoplastic polymer, which contains 0.1 to 15% by weight of natural vegetable oil and fat. The above natural vegetable oil has a melting point below 0 ° C and a boiling point of above 200 ° C; the above natural vegetable oil contains oleic acid and horn shark Alkene.

The oleic acid content of the above natural vegetable oil and fat is preferably 55 to 97% by weight.

The squalene content in the above natural vegetable oil is preferably from 0.1 to 3% by weight.

The above natural vegetable oil preferably contains 0.1 to 20% by weight of linoleic acid.

The above thermoplastic polymer is preferably one or more selected from the group consisting of polyethylene terephthalate, nylon 6 or butylene terephthalate.

The above thermoplastic polymer is preferably also a polyolefin, and more preferably polypropylene. The polyolefin soft fiber described above preferably further contains carotenoids.

The present invention also discloses a fabric comprising the above soft fibers.

Natural plant fats and oils are dispersed in the soft fibers of the present invention. The addition of natural vegetable oils can modify the surface of the fibers to form tiny irregularities and make fabrics. The body can produce a soft touch when it comes into contact with the skin, and the fabric feels soft and comfortable to wear.

The content of natural vegetable oils and fats in the fiber accounts for 0.1 to 15% by weight of the total amount of the fibers. If the content of the natural vegetable oil in the fiber is less than 0.1% by weight, the softness of the fiber is not good; if the content of the natural vegetable oil in the fiber is more than 15% by weight, the fiber is formed when the fiber is prepared from a mixture of the thermoplastic polymer and the natural vegetable oil. Bad sex. The content of the natural vegetable oil and fat in the fiber of the present invention is preferably from 2 to 10% by weight based on the total amount of the fiber from the viewpoint of the softness and the fiber formability of the fiber.

For fibers mainly used in clothing, if the melting point of the natural vegetable oil in the fiber exceeds 0 ° C or higher, the outer temperature is lower than the melting point of the natural vegetable oil, and the fat will solidify in the fabric, resulting in the fabric being more ordinary than the polymerization. The fibers are harder and the feel and appearance of the fabric are worse. Therefore, the present invention selects a natural vegetable oil having a melting point of 0 ° C or less, so that the obtained fiber can be adapted to the wearing requirements at any temperature, and even if the temperature is lower than 0 ° C, the laundry does not become hard due to the solidification of the natural vegetable oil.

The soft fiber containing natural vegetable oil of the present invention is obtained by melt-spinning a blend of a thermoplastic polymer and a natural vegetable oil, so that the natural vegetable oil selected for selection must have a boiling point which satisfies the minimum requirements of the spinning temperature. The invention selects natural vegetable oils and fats having a boiling point above 200 ° C, preferably has a boiling point of 270 ° C or higher, can ensure that heat resistance does not occur when spinning with a high melting point thermoplastic polymer, and does not occur due to vaporization of natural vegetable oils and fats. The waste of grease and the increase in cost.

The natural fat and oil of the present invention preferably contains 55 to 97% by weight of oleic acid, and the oleic acid has a strong moisturizing ability, and has excellent moisturizing effect on human skin when directly applied; and as an unsaturated acid, oleic acid also has antibacterial and anti-inflammatory properties. Effect. The application of oleic acid to fibers also imparts excellent moisturizing and antibacterial properties to the fibers.

However, as a monounsaturated acid, oleic acid has a poor heat resistance, and when it is mixed with a high-melting point thermoplastic polymer, it is liable to cause discoloration or decomposition at the time of spinning, and thus its use is limited. Therefore, in order to alleviate the uncertainty in heat resistance by oleic acid, the natural vegetable oil of the present invention preferably further contains squalene. Squalene is a natural bioactive substance. It can improve the heat resistance of natural vegetable oils to a certain extent, and at the same time improve the hardening of fibers and fabrics made of fibers during the shaping heating process. Plants maintain better softness.

The content of squalene in the above natural fats and oils is preferably from 0.1 to 3% by weight. If the content of squalene is too small, it can not effectively improve the heat resistance of natural vegetable oils and the softness of fibers/fabrics. There is basically no difference in the performance of natural vegetable oils containing no squalene; if the content of squalene is too much, it will naturally The dispersibility of vegetable oils in thermoplastic polymers is deteriorated, resulting in an increase in the rate of yarn breakage during the spinning process, a large drop in production efficiency, and no practical value.

Further, in order to improve the moisture absorption performance of the fiber, the natural vegetable oil of the present invention preferably further contains 0.1 to 20% by weight of linoleic acid.

Linseed acid as an unsaturated fatty acid has good hygroscopicity, but if it is too high, it will inhibit the heat resistance of oleic acid during heating, resulting in thermal decomposition of oleic acid, indirectly leading to fibers containing natural oils. There are problems such as discoloration.

The main component of the soft fiber of the present invention is a thermoplastic polymer. The thermoplastic polymer is not particularly limited, and may be polyester, polyamine, polyolefin, etc., specifically polyethylene terephthalate. Polybutylene terephthalate, nylon 6, nylon 66, polyethylene, polypropylene or polystyrene.

The thermoplastic polymer of the present invention may preferably be selected from the group consisting of polyparaphenylene One or more of ethylene glycol diester, polybutylene terephthalate or nylon 6.

The above thermoplastic polymer may also preferably be a polyolefin, and more preferably a polypropylene.

The polyolefin soft fiber of the present invention preferably further contains a carotenoid. Since the polyolefin fiber has poor dyeability, the natural carotenoid can be used as a natural dye to color the polyolefin fiber. Preferably, the content of the carotenoid in the natural vegetable oil is from 0 to 0.5% by weight.

The soft fiber of the present invention can be prepared by first forming a thermoplastic polymer and a natural vegetable oil into a masterbatch, and then feeding the thermoplastic polymer chip and the masterbatch together into a silo, mixing the mixture and feeding the screw into the screw. The extruder is finally spun to obtain soft fiber; or the thermoplastic polymer is first sliced into the silo, and then the natural vegetable oil is added to the screw extruder slice feed inlet through the liquid adding device, and the mixture is uniformly mixed after the slice is melted. Into the screw extruder, and finally spun to obtain soft fibers.

The natural vegetable oil and the thermoplastic polymer may have a weight of 20 to 50:80 to 50 in the preparation of the above-mentioned thermoplastic polymer and natural vegetable fat and oil masterbatch.

The spinning method may be any known melt spinning method, such as one-step drawing, two-step processing, and the like.

Due to the presence of natural vegetable oils and fats, the fibers of the present invention are soft, and in particular, the finished fabric gives a soft feeling and is softer than ordinary fabrics, mainly because the bending stiffness (B) of the above-mentioned fabric of the present invention is reduced relative to ordinary fabrics by 10~ 50%, preferably 20~40%, the lag distance (2HB) is reduced by 10~50%, preferably 20~40%, and the surface roughness (SMD) is increased by 10~30%, preferably 15~25%, and can still be maintained. Good tensile strength. At the same time, the fiber of the present invention can be prepared by various melt spinning methods known in the art, and the fiber does not contain heavy metals, synthetic softeners, etc., and is harmless to the environment. Green fiber can be effectively mass produced.

The test method of the invention relating to parameters is as follows:

(1) Content of natural vegetable oils and fats in fibers

Two grams of fibers containing natural vegetable oils and fats were selected and dissolved in a solution (dissolved liquid component reference FZ-T 01057.4-2007 standard) for 6 hours and the residue was withdrawn. After the residue was concentrated by stirring, the residue was filtered through a PTFE filter (0.45 um), and the surface layered oil was extracted to weigh M g. By conversion, the content of natural vegetable oil and fat in the fiber is obtained as N%=(M/2)*100.

(2) Oleic acid and linoleic acid content in natural vegetable oils and fats

Determination of oleic acid and linoleic acid in fiber by GC/T 22501-2008 gas chromatography (GC) method, and then obtain oleic acid and linoleic acid content in natural vegetable oils; oleic acid content in natural vegetable oil = oleic acid content in fiber / Natural vegetable oil content in fiber, linoleic acid content in natural vegetable oil = linoleic acid content in fiber / natural vegetable oil content in fiber.

(3) Squalene and carotenoid content in natural vegetable oils and fats

The content of squalene and carotenoids in the fiber was determined by nuclear magnetic resonance (NMR), and the content of squalene and carotenoid in natural vegetable oil was obtained through conversion; the content of squalene in natural vegetable oil = squalene in fiber Content / natural vegetable oil content in fiber, carotenoid content in natural vegetable oil = carotenoid content in fiber / fiber Vitamins in natural vegetables.

(4) Size of natural vegetable oil in fiber

The surface and cross section of the fiber were observed by scanning electron microscope SEM or transmission electron microscope TEM to obtain an electronic image, and then processed by winrof software to obtain the dispersion size of the natural vegetable oil liquid.

(5) The melting point of natural vegetable oils in fiber

Determination by GB/T 617-2006 chemical reagent general melting point test method

(6) The boiling point of natural vegetable oils in fiber

Determination by GB/T 616-2006 chemical reagent universal boiling point test method

(7) Fiber strength, elongation at break and strength product

The sample was measured on a tensile tester (Tensilon UCT-100) under the constant-speed elongation conditions in the JIS-L1013 (1999) 8.5.1 standard test. The sample length was 20 cm, the stretching speed was 20 cm/min, and the number of tests was 10 times. In addition, the elongation at break is obtained from the elongation of the fiber at the maximum strength in the S~S curve.

The tensile product can be obtained by the following formula, the product of strength = strength (cN/dtex) × (elongation at break (%) ^0.5 ).

(8) Fabric softness (bending stiffness, lag distance)

The bending stiffness and the lag distance were measured using the KES FB2 method standard.

(9) fabric surface roughness softness

Determination of roughness softness using the KES FB4 method standard

(10) Suction and desorption moisture parameter ΔMR (poor moisture absorption rate):

Select 3 parts of fiber sample of about 1g weight, place it in a weighing bottle of known quality, put it into a dryer at 60 ° C, take off the cap, prepare to dry for 30 minutes, then cover the bottle and weigh it. Take out the bottle; place the weighing bottle in a constant temperature and humidity machine at 20 °C × 65% RH environment, take off the bottle cap, balance for 24 hours, cover the bottle cap, take out the weighing bottle, and weigh it with a precision balance. The obtained mass minus the weight of the weighing bottle is the sample weight W1; the weighing bottle is placed in a constant temperature and humidity machine at 30 ° C × 90% RH environment, the cap is removed, and after 24 hours of balancing, the cap is closed. Take out the weighing bottle and weigh it with the same precision balance. The mass weighed minus the weight of the weighing bottle is the sample weight W2. Place the weighing bottle in a dryer at 105 °C, take off the cap, and dry. After 2 hours, cover the cap and take it out at room temperature in a drying dish. Weigh it with the same precision balance. The mass weighed minus the weight of the weighing bottle is the sample weight W3; formula: MR1=( W1-W3)/W3; MR2=(W2-W3)/W3; moisture absorption rate difference ΔMR(%)=MR2-MR1; the average of 3 samples was taken as the test result.

(11) Spinning property

Broken wire rate: more than 1 time / ton is bad, 1 time / ton or less is good.

Filtration pressure rise: 0.1Mpa/h or more is bad, 0Mpa/h is good

(Example)

The invention is further illustrated by the following examples.

<Example 1>

The polyester PET chips were dried to a moisture content of 100 ppm or less, and the mother particles containing 20% by weight of natural vegetable oil and fat were fed into a small silo, and the amount of the masterbatch added was 0.5 wt% with respect to the total mass of the chips, and the polyester PET chips and the master batch were prepared. After being mixed by the mixer, it enters the inlet of the screw extruder, melts in the screw extruder, and the discharge amount is controlled by the metering pump. The spinning fiber is spun through the spinning element controlled by the spinning box, and the virgin fiber is spun on the side. Cooling and solidifying under the air, and then uniformly oiling the fibers through the nozzle to bundle the fibers and reduce friction. The fiber bundled with the oil is passed through the spinning tunnel, into the first roller (1GR), and then wound around the second roller (2GR) to be taken up by the coiler to obtain the pre-oriented yarn POY.

The prepared pre-oriented yarn POY was processed on a false twisting machine, and the obtained false twisted silk DTY had an elongation at break of 32.3%, a strength of 3.36 cN/dtex, a tensile strength product of 19.1, and a fiber moisture absorption rate difference ΔMR. (%) is 0.23. Through testing, the natural vegetable oil has a melting point of -7 ° C, a boiling point of 300 ° C, a natural vegetable oil content of 0.5 wt% in the fiber, an oleic acid content of 75 wt% in natural vegetable oils, and a squalene content of 1 wt%. The dispersion size was 100 nm. Compared with the fabric made of 100% soft fiber and the same kind of fiber without natural oil, the bending stiffness is reduced by 10%, the lag distance is reduced by 10%, and the roughness is increased by 10%. The specific values are shown in Table 1.

<Example 2>

Dry the polyester PET slices to a moisture content of 100 ppm or less, which will contain 30% by weight of natural The masterbatch of the fat and oil was fed into the small silo, and the amount of the masterbatch added was set to 16 wt% with respect to the total weight of the slicing, and the spinning and false twisting were carried out in the same manner as in Example 1. The obtained DTY had an elongation at break of 30.4%, a strength of 3.41 cN/dtex, a tensile strength product of 18.8, and a fiber moisture absorption ratio ΔMR (%) of 0.53. Through testing, the natural vegetable oil has a melting point of -7 ° C, a boiling point of 305 ° C, a natural vegetable oil content of 4.8 wt%, a natural vegetable oil with an oleic acid content of 85 wt%, a squalene content of 1.5 wt%, and linoleic acid. The content was 5 wt%, and the grease droplet dispersion size was 500 nm. Compared with the fabric made of 100% soft fiber and the same kind of fiber without natural oil, the bending stiffness is reduced by 30%, the lag distance is reduced by 30%, and the roughness is increased by 15%. The specific values are shown in Table 1.

<Example 3>

The polyester PET chips were dried to a moisture content of 100 ppm or less, and the mother particles containing 50% by weight of natural fats and oils were fed into a small silo, and the amount of the mother particles added was set to 30% by weight based on the total mass of the chips, and spinning and false were carried out in the same manner as in Example 1.捻 processing. The obtained DTY had an elongation at break of 30.7%, a strength of 3.38 cN/dtex, a tensile strength product of 18.7, and a fiber moisture absorption rate difference ΔMR (%) of 0.75. Through testing, the natural vegetable oil has a melting point of -5 ° C, a boiling point of 305 ° C, a natural vegetable oil content of 15 wt% in the fiber, an oleic acid content of 89 wt% in natural vegetable oils, a squalene content of 3 wt%, and linoleic acid content. At 8 wt%, the grease droplet dispersion size was 50 nm. Compared with fabrics made of 100% soft fiber and fabrics of the same variety without added natural grease, the bending stiffness is reduced by 50%, the lag distance is reduced by 50%, and the roughness is increased by 30%. The specific values are shown in Table 1.

<Example 4>

Dry nylon N6 slices to a moisture content of 300 ppm or less, which will contain 20% by weight of natural The masterbatch of the fat and oil was fed into the small silo, and the amount of the masterbatch added was set to 5 wt% with respect to the total mass of the slicing, and the spinning and false twisting were carried out in the same manner as in Example 1. The obtained DTY had an elongation at break of 30.7%, a strength of 4.58 cN/dtex, a tensile strength product of 25.4, and a fiber moisture absorption rate difference ΔMR (%) of 2.5. Through testing, the natural vegetable oil has a melting point of -7 ° C, a boiling point of 300 ° C, a natural vegetable oil content of 1 wt% in the fiber, an oleic acid content of 90 wt% in natural vegetable oils, a squalene content of 1 wt%, and linoleic acid content. At 7 wt%, the grease droplet dispersion size was 100 nm. Compared with fabrics made from 100% soft fiber fabrics and fibers of the same variety without natural oils, the bending stiffness is reduced by 13%, the lag distance is reduced by 14%, and the roughness is increased by 12%. The specific values are shown in Table 1.

<Example 5>

The polyester PET chips were dried to a moisture content of 100 ppm or less, and the mother particles containing 20% by weight of natural fats and oils were fed into a small silo, and the amount of the masterbatch added was 0.5 wt% with respect to the total mass of the chips, and the PET PET chips and the master batch were passed. After mixing, the mixer enters the inlet of the screw extruder, melts in the screw extruder, and the discharge amount is controlled by the metering pump. The spinning fiber is spun through the spinning element controlled by the spinning box, and the raw fiber is spun. The film is cooled and solidified under conditions, and the fibers are evenly oiled by the nozzle to bundle the fibers and reduce friction. The fiber bundled with oil is passed through the spinning tunnel, entangled by the pre-coupling machine, enters the first heat roller 1HR, and is wound on the first heat roller for 6 to 7 turns, and then wound by the second heat roller 2HR. 6~7 turns, the stretched fiber between the first heat roller and the second heat roller is entangled by the main entangler under the second heat roller, and then the third roller (3GR) fourth roller (4GR) The fiber is introduced into a coiler and taken up into a finished cake (DSD).

The DSD obtained by the test had an elongation at break of 32.5%, a strength of 3.19 cN/dtex, a tensile strength product of 18.2, and a fiber moisture absorption rate difference ΔMR (%) of 0.22. through After testing, the natural vegetable oil has a melting point of -5 ° C, a boiling point of 300 ° C, the natural vegetable oil content of the fiber is 0.1 wt%, the natural vegetable oil has an oleic acid content of 90 wt%, the squalene content is 1 wt%, and the grease droplets are dispersed. The size is 500 nm. Compared with the fabric made of 100% soft fiber and the same kind of fiber without natural oil, the bending stiffness is reduced by 11%, the lag distance is reduced by 12%, and the roughness is increased by 11%. The specific values are shown in Table 1.

<Example 6>

The polyester PET chips are dried to a moisture content of less than 100 ppm, and the polyester PET chips are introduced into the screw extruder inlet, and the dispersion containing the natural oil is added to the screw feed port through a liquid addition device, and the amount is added to the polyester PET chips. 5wt% of the weight, and then melted with the polyester chips in the screw extruder, the discharge amount is controlled by the metering pump, and the nascent fiber is spun through the spinning element controlled by the spinning box, under the side blowing condition Cooling and solidifying, and then uniformly oiling the fibers through the nozzle to bundle the fibers and reduce friction. The fiber bundled with oil is passed through the spinning tunnel, entangled by the pre-coupling machine, enters the first heat roller 1HR, and is wound on the first heat roller for 6 to 7 turns, and then wound by the second heat roller 2HR. 6~7 turns, the stretched fiber between the first heat roller and the second heat roller is entangled by the main entangler under the second heat roller, and then the third roller (3GR) fourth roller (4GR) The fiber is introduced into a coiler and taken up into a finished cake (DSD).

The DSD obtained by the test had an elongation at break of 33.1%, a strength of 3.06 cN/dtex, a tensile strength product of 17.6, and a fiber moisture absorption rate difference ΔMR (%) of 0.55. Through testing, the natural vegetable oil has a melting point of -5 ° C, a boiling point of 315 ° C, the natural vegetable oil content of the fiber is 5 wt%, the natural vegetable oil has an oleic acid content of 95 wt%, the squalene content is 3 wt%, and the grease droplets are dispersed. The size is 100 nm. Use 100% soft fiber Compared with the fabric made of the same kind of fiber without woven natural grease, the bending stiffness is reduced by 30%, the lag distance is reduced by 30%, and the roughness is increased by 15%. The specific values are shown in Table 1.

<Example 7>

The polypropylene PP chips are dried to a moisture content of 100 ppm or less, and the polypropylene PP chips are introduced into the screw extruder inlet, and the natural oil-containing dispersion liquid is added to the screw feed port through a liquid adding device, and the added amount is the total weight of the polypropylene PP chips. 5wt%, and then melted with the polyester chips in the screw extruder, the discharge amount is controlled by the metering pump, the spinning fibers are spun out at the temperature controlled by the spinning box, and the nascent fibers are spun and cooled under the side blowing conditions. Curing is formed, and the fibers are evenly oiled by the nozzle to bundle the fibers and reduce friction. The fiber bundled with oil is passed through the spinning tunnel, entangled by the pre-coupling machine, enters the first heat roller 1HR, and is wound on the first heat roller for 6 to 7 turns, and then wound by the second heat roller 2HR. 6~7 turns, the stretched fiber between the first heat roller and the second heat roller is entangled by the main entangler under the second heat roller, and then the third roller (3GR) fourth roller (4GR) The fiber is introduced into a coiler and taken up into a finished cake (DSD).

The DSD obtained by the test had an elongation at break of 53.1%, a strength of 4.06 cN/dtex, a tensile strength product of 29.7, and a fiber moisture absorption rate difference ΔMR (%) of 0.05. Through testing, natural vegetable oils have a melting point of -5 ° C, a boiling point of 225 ° C, a natural vegetable oil content of 5 wt% in the fiber, a natural vegetable oil with an oleic acid content of 95 wt%, a squalene content of 3 wt%, and a carotenoid of 0.036. The wt%, grease droplet dispersion size is 100 nm. Compared with the fabric made of 100% soft fiber and the same kind of fiber without natural oil, the bending stiffness is reduced by 30%, the lag distance is reduced by 30%, and the roughness is increased by 15%. The specific values are shown in Table 1.

<Example 8>

The polyethylene PE slice is dried to a moisture content of less than 100 ppm, and the polyethylene PE slice enters the screw extruder inlet, and the natural oil dispersion is added to the screw feed port through a liquid addition device, and the added amount is the total weight of the polypropylene PP slice. 5wt%, and then melted with the polyester chips in the screw extruder, the discharge amount is controlled by the metering pump, the spinning fibers are spun out at the temperature controlled by the spinning box, and the nascent fibers are spun and cooled under the side blowing conditions. Curing is formed, and the fibers are evenly oiled by the nozzle to bundle the fibers and reduce friction. The fiber bundled with oil is passed through the spinning tunnel, entangled by the pre-coupling machine, enters the first heat roller 1HR, and is wound on the first heat roller for 6 to 7 turns, and then wound by the second heat roller 2HR. 6~7 turns, the stretched fiber between the first heat roller and the second heat roller is entangled by the main entangler under the second heat roller, and then the third roller (3GR) fourth roller (4GR) The fiber is introduced into a coiler and taken up into a finished cake (DSD).

The DSD obtained by the test had an elongation at break of 23.1%, a strength of 3.76 cN/dtex, a tensile strength product of 18.1, and a fiber moisture absorption rate difference ΔMR (%) of 0.05. Through testing, natural vegetable oils have a melting point of -5 ° C, a boiling point of 235 ° C, a natural vegetable oil content of 5 wt% in the fiber, a natural vegetable oil with an oleic acid content of 95 wt%, a squalene content of 3 wt%, and a carotenoid of 0.036. The wt%, grease droplet dispersion size is 100 nm. Compared with the fabric made of 100% soft fiber and the same kind of fiber without natural oil, the bending stiffness is reduced by 30%, the lag distance is reduced by 30%, and the roughness is increased by 15%. The specific values are shown in Table 1.

<Example 9>

The polypropylene PP slices are dried to a moisture content of 100 ppm or less, and the polypropylene PP is sliced. Into the screw extruder inlet, while adding the natural oil dispersion through the liquid addition equipment at the screw feed port, the amount added is 5wt% of the total weight of the polypropylene PP slice, and then with the polyester slice in the screw extruder Melting, the discharge amount is controlled by the metering pump, the spinning fiber is controlled by the spinning box, the nascent fiber is spun, cooled and solidified under the side blowing condition, and the fiber is uniformly oiled by the nozzle to make the fiber bundle And reduce friction. The fiber bundled with oil is passed through the spinning tunnel, entangled by the pre-coupling machine, enters the first heat roller 1HR, and is wound on the first heat roller for 6 to 7 turns, and then wound by the second heat roller 2HR. 6~7 turns, the stretched fiber between the first heat roller and the second heat roller is entangled by the main entangler under the second heat roller, and then the third roller (3GR) fourth roller (4GR) The fiber is introduced into a coiler and taken up into a finished cake (DSD).

The DSD obtained by the test had an elongation at break of 53.1%, a strength of 4.06 cN/dtex, a tensile strength product of 29.7, and a fiber moisture absorption rate difference ΔMR (%) of 0.05. Through testing, the natural vegetable oil has a melting point of -5 ° C, a boiling point of 225 ° C, the natural vegetable oil content of the fiber is 5 wt%, the natural vegetable oil has an oleic acid content of 95 wt%, the squalene content is 3 wt%, and the grease droplets are dispersed. The size is 100 nm. Compared with the fabric made of 100% soft fiber and the same kind of fiber without natural oil, the bending stiffness is reduced by 30%, the lag distance is reduced by 30%, and the roughness is increased by 15%. The specific values are shown in Table 1.

<Example 10>

The polyester PET chips were dried to a moisture content of 100 ppm or less, and the mother particles containing 50% by weight of natural fats and oils were fed into a small silo, and the amount of the mother particles added was set to 30% by weight based on the total mass of the chips, and spinning and false were carried out in the same manner as in Example 1.捻 processing. The obtained DTY has an elongation at break of 30.7%, a strength of 3.38 cN/dtex, a tensile strength product of 18.7, and a poor moisture absorption rate of the fiber. ΔMR (%) was 0.65. Through testing, natural vegetable oils have a melting point of -5 ° C, a boiling point of 305 ° C, a natural vegetable oil content of 15 wt% in the fiber, a natural vegetable oil with an oleic acid content of 50 wt%, a squalene content of 0.05 wt%, and linoleic acid. The content was 18% by weight, and the grease droplet dispersion size was 50 nm. Compared with the fabric made of 100% soft fiber and the same kind of fiber without natural oil, the bending stiffness is reduced by 30%, the lag distance is reduced by 25%, and the roughness is increased by 15%. The specific values are shown in Table 1.

<Comparative Example 1>

The polyester PET chips were dried to a moisture content of 100 ppm or less, and the mother particles containing 20% by weight of natural fats and oils were fed into a small silo, and the amount of the masterbatch added was 0.1 wt% with respect to the total mass of the chips, and spinning was carried out in the same manner as in Example 1. False processing. The obtained DTY had an elongation at break of 32.9%, a strength of 3.68 cN/dtex, a tensile strength product of 21.1, and a fiber moisture absorption ratio ΔMR (%) of 0.20. Through testing, the natural vegetable oil has a melting point of -5 ° C, a boiling point of 300 ° C, a natural vegetable oil content of 0.02 wt% in the fiber, a natural vegetable oil with an oleic acid content of 55 wt%, a squalene content of 3 wt%, and linoleic acid. The content was 7 wt%, and the grease droplet dispersion size was 300 nm. Compared with the fabric made of 100% soft fiber and the same kind of fiber without natural oil, the bending stiffness is reduced by 1%, the lag distance is unchanged, the roughness is unchanged, and there is no obvious soft effect and suction. The wet effect has no soft hand on the surface. The specific values are shown in Table 2.

<Comparative Example 2>

The polyester PET chips were dried to a moisture content of 100 ppm or less, and the mother particles containing 50% by weight of natural fats and oils were fed into a small silo, and the amount of the mother particles added was set to 50% by weight based on the total mass of the chips, and spinning and false were carried out in the same manner as in Example 1.捻 processing. Elongation at break of the obtained DTY It was 27.9%, the strength was 2.79 cN/dtex, the tensile strength product was 14.7, and the fiber moisture absorption rate difference ΔMR (%) was 0.80. Through testing, the natural vegetable oil has a melting point of -5 ° C, a boiling point of 300 ° C, the natural vegetable oil content of the fiber is 25 wt%, the natural vegetable oil has an oleic acid content of 88.4 wt%, the squalene content is 3 wt%, and linoleic acid The content was 11% by weight, and the droplet size of the grease droplets was 1000 nm. Compared with the fabric made of 100% soft fiber and the same kind of fiber without natural oil, the bending stiffness is reduced by 55%, the lag distance is reduced by 50%, the roughness is increased by 35%, and the fabric is obvious. Soft and squeaky, but the fiber has a poor tensile strength. Moreover, the spinning process interrupts the yarn rate up to 27 times/ton, and the operability is poor. The specific values are shown in Table 2.

<Comparative Example 3>

The polyester PET chips are dried to a moisture content of less than 100 ppm, and the polyester PET chips are introduced into the screw extruder inlet, and the squalene dispersion liquid is added to the screw feed port through a liquid addition device, and the amount of the polyester PET chips is added. A spinning test was carried out in the same manner as in Example 6 at 5 wt% of the weight. The DSD obtained by the test had an elongation at break of 33.1%, a strength of 2.74 cN/dtex, a tensile strength product of 15.8, and a fiber moisture absorption rate difference ΔMR (%) of 0.20. The squalene liquid dispersion size is 4000 nm. Compared with the fabric made of 100% soft fiber and the same kind of fiber without natural vegetable oil, the bending stiffness is reduced by 30%, the lag distance is reduced by 8%, and the roughness is unchanged. Although the bending stiffness of the fabric is reduced, there is no major change in the lag distance and roughness. The moisture absorption rate did not change, the fabric did not have a soft hand, and the filtration pressure of the fiber increased by 3 Mpa/h during the spinning process, and the breaking rate was as high as 17 times/ton. The specific values are shown in Table 2.

Claims (9)

A soft fiber characterized in that it is mainly composed of a thermoplastic polymer containing 0.1 to 15% by weight of natural vegetable oil and fat, and the natural vegetable oil has a melting point below 0 ° C and a boiling point of 200 ° C or higher; the above natural vegetable fat Contains oleic acid and squalene. The soft fiber of claim 1, wherein the natural vegetable oil or fat has an oleic acid content of 55 to 97% by weight. The soft fiber of claim 1 or 2, wherein the natural vegetable oil or fat has a squalene content of 0.1 to 3 wt%. The soft fiber of claim 1 or 2, wherein the natural vegetable oil or fat contains 0.1 to 20% by weight of linoleic acid. The soft fiber of claim 1, wherein the thermoplastic polymer is one or more selected from the group consisting of polyethylene terephthalate, nylon 6, or butylene terephthalate. The soft fiber of claim 1, wherein the thermoplastic polymer is a polyolefin. The soft fiber of claim 6, wherein the polyolefin is polypropylene. The soft fiber of claim 6 or 7, wherein the soft fiber further contains carotenoids. A fabric characterized by comprising the soft fiber of claim 1.