Method for preparing regenerated cellulose fibers having anti-bacteria, anti-mite and anti-mould functions and the use thereof

Abstract

The present invention provides a method for preparing regenerated cellulose fibers having anti-bacteria, anti-mite and anti-mould functions from a fennel extract, a Litsea cubeba extract, and a thyme essential oil. The present invention also relates to the use of the regenerated cellulose fiber prepared by the above method in the field of anti-bacteria, anti-mite and mildew-resistant fabrics. The invention solves the technical defect that regenerated cellulose fibers have a single function and has poor anti-mite and anti-mould effects in the prior art.

Claims

1. A method for preparing a regenerated cellulose fiber having anti-bacterial, anti-mite and anti-mould functions, comprising the steps of: (1) preparing a composite slurry; (2) blending the composite slurry and a denatured cellulose spinning dope to prepare a blended spinning dope; and (3) spinning the blended spinning dope and performing a post-treatment, thereby producing the regenerated cellulose fiber, wherein the composite slurry is prepared by a process comprising: i) blending a Fructus Foeniculi extract and a Litsea cubeba extract to obtain a blended powder; ii) mixing the blended powder obtained in step i) with a Thymus mongolicus Ronn essential oil to prepare an oily blended powder slurry and further emulsifying the oily blended power slurry to obtain an emulsion; and iii) reacting the emulsion obtained in step ii) with a urea-formaldehyde resin prepolymer to obtain the composite slurry.

2. The method of claim 1, wherein the Fructus Foeniculi extract and the Litsea cubeba extract are blended in a mass ratio of 1:(0.5-1.5) in step i), and the particle size D90 of the blended powder is 1.568 m.

3. The method of claim 1, wherein the mass ratio of the blended powder to the Thymus mongolicus Ronn essential oil in step ii) is (5-10):1.

4. The method of claim 1, wherein the emulsifying in step ii) is performed by adding the oily blended powder slurry into an aqueous system containing 0.5-1.5% of styrene-maleic anhydride sodium salt, wherein the mass ratio of the oily blended powder slurry to the aqueous system is 1:(2-5), and wherein the particle size D90 of emulsion is 2.038 m.

5. The method of claim 1, wherein in step iii), the emulsion is reacted with the urea-formaldehyde resin prepolymer at 70-80 C. with stirring, wherein the ratio of the total mass of the Fructus Foeniculi extract, the Litsea cubeba extract and the Thymus mongolicus Ronn essential oil in the emulsion to the mass of the urea-formaldehyde resin prepolymer is (1-3):1, and wherein the particle size D90 of the composite slurry is 2.562 m, and the solid content is 20%-40%.

6. The method of claim 1, wherein the denatured cellulose spinning dope of the step (2) is prepared by a process comprising: first preparing a viscose dope from a cellulose pulp having a polymerization degree of 800 to 1000 as a raw material, and then adding a denaturant of a polyoxyethylene compound, wherein the ratio of the addition amount of the denaturant to the mass of the -cellulose in the viscose dope is 0.1-1.0%, the denatured cellulose spinning dope has a viscosity of 60-96 s and the degree of esterification of 65-85.

7. The method of claim 1, wherein the mass ratio of the composite slurry in the blended spinning dope of the step (2) to the -cellulose in the denatured cellulose spinning dope is 4.0% to 10.0%.

8. The method of claim 1, wherein a coagulation bath is used in the step (3) of spinning with a coagulation temperature of 20 to 40 C. and the coagulation bath composition comprises 5.0 to 8.0% of sulfuric acid, 0.5 to 1.0% of aluminum sulfate, 10.0%-16.0% of sodium sulfate, 0.1-0.5% of the polyoxyethylene compound, the balance being water.

9. The method of claim 1, wherein the post-treatment of step (3) comprises desulfurization, oil bathing, water washing, drying by baking, or a combination thereof.

10. An anti-bacteria, anti-mite, and/or anti-mould fabric, comprising the anti-bacterial, anti-mite, and/or anti-mould regenerated cellulose fiber prepared by the method of claim 1.

Description

EXAMPLES

(1) In the following, preferred embodiments of the present invention are described. It should be understood that the preferred embodiments described herein are only for illustrating and explaining the present invention, and not intended to limit the present invention.

Example 1

(2) A method for preparing regenerated cellulose fibers having anti-bacteria, anti-mite and anti-mould functions with a specification of 1.11 dtex38 mm, comprising the steps of:

(3) 1. The Preparation Step of a Composite Slurry

(4) 1) a fennel extract and a Litsea cubeba extract were mixed, crushed, ground to obtain a blended powder of the two for future use, wherein the mass ratio of the fennel extract to the Litsea cubeba extract in blended powder was 1:0.5, and the particle size D90 of the powder was 1.256 m.

(5) 2) The above prepared blended powder and a thyme essential oil were blended homogeneously, so that the surface of the blended powder was covered with a layer of the thyme essential oil to prepare an oily blended powder slurry, wherein the mass ratio of the blended powder to the thyme essential oil was 5:1.

(6) The above oily blended powder slurry was added into an emulsifier, a styrene maleic anhydride sodium salt aqueous system having styrene maleic anhydride sodium salt content of 0.5%, forming O/W emulsion, wherein the mass ratio of the oily blended powder slurry to the aqueous system was 1:5, and the particle size D90 of the emulsified emulsion was 1.565 m.

(7) 3) Preparation of the composite slurry. The oily blended powder slurry emulsion was added to a urea-formaldehyde resin prepolymer, reacted at 70-80 C. with sufficiently stirring, so that the urea-formaldehyde resin prepolymer crossly link to prepare a plant composite slurry, which is composed of the oily blended powder slurry emulsion obtained using thyme, fennel and Litsea cubeba as plant sources being a capsule core and the urea-formaldehyde resin being a capsule wall, wherein the ratio of the total mass amount of the fennel extract, the Litsea cubeba extract and the A thyme essential oil to the mass of the urea-formaldehyde resin prepolymer was 1:1, the particle size D90 of the multi-functional composite slurry was 2.216 m, and the solid content was 20.1%.

(8) 2. The Step for Preparing a Blended Spinning Dope by Blending the Composite Slurry and a Denatured Cellulose Spinning Dope

(9) 1) The Step for Preparing a Denatured Cellulose Spinning Dope

(10) Cellulose pulps were used as raw materials. A viscose dope was prepared through a viscose preparation process, and a denaturant was added into the viscose dope for denaturation to prepare a denatured cellulose spinning dope. The polymerization degree of the cellulose pulps was 800. The denaturant used was a polyoxyethylene compound and the ratio of the addition amount to the mass of the -cellulose in the viscose dope was 0.1%. The viscosity of the denatured cellulose spinning dope was 60 s and the degree of esterification was 65.

(11) 2) The Step for Blending to Prepare a Blend Spinning Dope

(12) The composite slurry prepared in step 1 was added to the denatured cellulose spinning dope prepared in step 2 through a pre-spinning injection system, wherein the pre-spinning injection system comprised a filtering device, a metering device and a mixing device to achieve the filtration of the plant composite slurry, precise metering, and homogeneously mixing with the denatured cellulose spinning dope. The mass ratio of the composite slurry to the -cellulose in the denatured cellulose spinning dope was 4.0%. The particle size of the particles allowed to pass through the filter device of the pre-spinning injection system was 2.658 m. The mixing device consisted of a dynamic mixer, and the mixing time was 30 s.

(13) 3. Spinning and Post-Treatment

(14) The blended spinning dope was spun through a adjusted coagulation bath, and the primary tow was drafted to obtain a shaped tow. The resulting tow was cut, subjected to a mild desulfurization process, transferred to an oil bath and refining baths such as for water washing. A plant regenerated cellulose fiber having anti-bacteria, anti-mite and anti-mould functions was obtained after drying.

(15) The coagulation bath temperature was 20 C. The coagulation bath composition consisted of 5.0% of sulfuric acid, 0.5% of aluminum sulphate, 10.0% of sodium sulphate and 0.1% of polyoxyethylene compounds with the balance being water.

(16) The fiber had a repellent rate of 85% and a inhibitory rate of 85% against mites. The anti-mould level could reach 1 level. The antibacterial activity value was 2.2, and the bactericidal activity value was 0.3. The fiber had a fiber degree of polymerization of 515, a dry breaking strength of 3.52 cN/dtex, a variation coefficient of dry strength of 11.2%, a wet strength of 2.11 cN/dtex, a hooking strength of 1.22 cN/dtex and a wet modulus of 0.55 cN/dtex.

Example 2

(17) A method for preparing plant regenerated cellulose fibers having anti-bacteria, anti-mite and anti-mould functions with a specification of 1.33 dtex38 mm, comprising the steps of:

(18) 1. The Preparation Step of a Composite Slurry

(19) 1) a fennel extract and a Litsea cubeba extract were mixed, crushed, ground to obtain a blended powder of the two for future use, wherein the mass ratio of the fennel extract to the Litsea cubeba extract in blended powder was 1:0.75, and the particle size D90 of the blended powder was 1.321 m.

(20) 2) The above prepared blended powder and a thyme essential oil were blended homogeneously, so that the surface of the blended powder was covered with a layer of the thyme essential oil to prepare an oily blended powder slurry, wherein the mass ratio of the blended powder to the thyme essential oil was 6:1.

(21) The above oily blended powder slurry was added into an emulsifier, a styrene maleic anhydride sodium salt aqueous system having styrene maleic anhydride sodium salt content of 0.65%, forming O/W emulsion, wherein the mass ratio of the oily blended powder slurry to the aqueous system was 1:4, and the particle size D90 of the emulsified emulsion was 1.663 m.

(22) 3) Preparation of the composite slurry. The oily blended powder slurry emulsion was added to a urea-formaldehyde resin prepolymer, reacted at 70-80 C. with sufficiently stirring, so that the urea-formaldehyde resin prepolymer cross linkly to prepare a plant composite slurry, which is composed of the oily blended powder slurry emulsion obtained using thyme, fennel and Litsea cubeba as plant sources being a capsule core and the urea-formaldehyde resin being a capsule wall, wherein the ratio of the total mass amount of the fennel extract, the Litsea cubeba extract and the A thyme essential oil to the mass of the urea-formaldehyde resin prepolymer was 1.2:1, the particle size D90 of the multi-functional composite slurry was 2.312 m, and the solid content was 26.7%.

(23) 2. The Step for Preparing a Blended Spinning Dope by Blending the Composite Slurry and a Denatured Cellulose Spinning Dope

(24) 1) The Step for Preparing a Denatured Cellulose Spinning Dope

(25) Cellulose pulps were used as raw materials. A viscose dope was prepared through a viscose preparation process, and a denaturant was added into the viscose dope for denaturation to prepare a denatured cellulose spinning dope. The polymerization degree of the cellulose pulps was 826. The denaturant used was a polyoxyethylene compound and the ratio of the addition amount to the mass of the -cellulose in the viscose dope was 0.26%. The viscosity of the denatured cellulose spinning dope was 68 s and the degree of esterification was 73.

(26) 2) The Step for Blending to Prepare a Blend Spinning Dope

(27) The composite slurry prepared in step 1 was added to the denatured cellulose spinning dope prepared in step 2 through a pre-spinning injection system, wherein the pre-spinning injection system comprised a filtering device, a metering device and a mixing device to achieve the filtration of the plant composite slurry, precise metering, and homogeneously mixing with the denatured cellulose spinning dope. The mass ratio of the composite slurry to the -cellulose in the denatured cellulose spinning dope was 5.8%. The particle size of the particles allowed to pass through the filter device of the pre-spinning injection system was 2.756 m. The mixing device consisted of a static mixer, and the mixing time was 78 s.

(28) 3. Spinning and Post-Treatment

(29) The blended spinning dope was spun through an adjusted coagulation bath, and the primary tow was drafted to obtain a shaped tow. The resulting tow was cut, subjected to a mild desulfurization process, transferred to an oil bath and refining baths such as for water washing. A plant regenerated cellulose fiber having anti-bacteria, anti-mite and anti-mould functions was obtained after drying.

(30) The coagulation bath temperature was 26 C. The coagulation bath composition consisted of 5.2% of sulfuric acid, 0.62% of aluminum sulphate, 10.0% of sodium sulphate and 0.15% of polyoxyethylene compounds with the balance being water.

(31) The fiber had a repellent rate of 88% and an inhibitory rate of 87% against mites. The anti-mould level could reach 1 level. The antibacterial activity value was 2.4, and the bactericidal activity value was 0.4. The fiber had a fiber degree of polymerization of 502, a dry breaking strength of 3.44 cN/dtex, a variation coefficient of dry strength of 12.1%, a wet strength of 2.02 cN/dtex, a hooking strength of 1.15 cN/dtex and a wet modulus of 0.52 cN/dtex.

Example 3

(32) A method for preparing regenerated cellulose fibers having anti-bacteria, anti-mite and anti-mould functions with a specification of 1.56 dtex38 mm, comprising the steps of:

(33) 1. The Preparation Step of a Composite Slurry

(34) 1) a fennel extract and a Litsea cubeba extract were mixed, crushed, ground to obtain a blended powder of the two for future use, wherein the mass ratio of the fennel extract to the Litsea cubeba extract in blended powder was 1:1, and the particle size D90 of the blended powder was 1.412 m.

(35) 2) The above prepared blended powder and a thyme essential oil were blended homogeneously, so that the surface of the blended powder was covered with a layer of the thyme essential oil to prepare a oily blended powder slurry, wherein the mass ratio of the blended powder to the thyme essential oil was 7:1.

(36) The above oily blended powder slurry was added into an emulsifier, a styrene maleic anhydride sodium salt aqueous system having styrene maleic anhydride sodium salt content of 0.89%, forming O/W emulsion, wherein the mass ratio of the oily blended powder slurry to the aqueous system was 1:3, and the particle size D90 of the emulsified emulsion was 1.782 m.

(37) 3) Preparation of the composite slurry. The oily blended powder slurry emulsion was added to a urea-formaldehyde resin prepolymer, reacted at 70-80 C. with sufficiently stirring, so that the urea-formaldehyde resin prepolymer crossly link to prepare a plant composite slurry, which is composed of the oily blended powder slurry emulsion obtained using thyme, fennel and Litsea cubeba as plant sources being a capsule core and the urea-formaldehyde resin being a capsule wall, wherein the ratio of the total mass amount of the fennel extract, the Litsea cubeba extract and the thyme essential oil to the mass of the urea-formaldehyde resin prepolymer was 1.5:1, the particle size D90 of the multi-functional composite slurry was 2.396 m, and the solid content was 32.5%.

(38) 2. The Step for Preparing a Blended Spinning Dope by Blending the Composite Slurry and a Denatured Cellulose Spinning Dope

(39) 1) The Step for Preparing a Denatured Cellulose Spinning Dope

(40) Cellulose pulps were used as raw materials. A viscose dope was prepared through a viscose preparation process, and a denaturant was added into the viscose dope for denaturation to prepare a denatured cellulose spinning dope. The polymerization degree of the cellulose pulps was 896. The denaturant used was a polyoxyethylene compound and the ratio of the addition amount to the mass of the -cellulose in the viscose dope was 0.51%. The viscosity of the denatured cellulose spinning dope was 76 s and the degree of esterification was 78.

(41) 2) The Step for Blending to Prepare a Blend Spinning Dope

(42) The composite slurry prepared in step 1 was added to the denatured cellulose spinning dope prepared in step 2 through a pre-spinning injection system, wherein the pre-spinning injection system comprised a filtering device, a metering device and a mixing device to achieve the filtration of the plant composite slurry, precise metering, and homogeneously mixing with the denatured cellulose spinning dope. The mass ratio of the composite slurry to -cellulose in the denatured cellulose spinning dope was 7.5%. The particle size of the particles allowed to pass through the filter device of the pre-spinning injection system was 2.632 m. The mixing device consisted of a dynamic mixer and a static mixer linked in series, and the mixing time was 155 s.

(43) 3. Spinning and Post-Treatment

(44) The blended spinning dope was spun through an adjusted coagulation bath, and the primary tow was drafted to obtain a shaped tow. The resulting tow was cut, subjected to a mild desulfurization process, transferred to an oil bath and refining baths such as for water washing. A plant regenerated cellulose fiber having anti-bacteria, anti-mite and anti-mould functions was obtained after drying.

(45) The coagulation bath temperature was 31 C. The coagulation bath composition consisted of 6.5% of sulfuric acid, 0.76% of aluminum sulphate, 13.2% of sodium sulphate and 0.25% of polyoxyethylene compounds with the balance being water.

(46) The fiber had a repellent rate of 92% and an inhibitory rate of 92% against mites. The anti-mould level could reach 0 level. The antibacterial activity value was 2.5, and the bactericidal activity value was 0.5. The fiber had a fiber degree of polymerization of 488, a dry breaking strength of 3.32 cN/dtex, a variation coefficient of dry strength of 12.5%, a wet strength of 1.89 cN/dtex, a hooking strength of 1.07 cN/dtex and a wet modulus of 0.45 cN/dtex.

Example 4

(47) A method for preparing regenerated cellulose fibers having anti-bacteria, anti-mite and anti-mould functions with a specification of 1.67 dtex38 mm, comprising the steps of:

(48) 1. The Preparation Step of a Composite Slurry

(49) 1) a fennel extract and a Litsea cubeba extract were mixed, crushed, ground to obtain a blended powder of the two for future use, wherein the mass ratio of the fennel extract to the Litsea cubeba extract in blended powder was 1:1.25, and the particle size D90 of the blended powder was 1.523 m.

(50) 2) The above prepared blended powder and a thyme essential oil were blended homogeneously, so that the surface of the blended powder was covered with a layer of the thyme essential oil to prepare an oily blended powder slurry, wherein the mass ratio of the blended powder to the thyme essential oil was 8.5:1.

(51) The above oily blended powder slurry was added into an emulsifier, a styrene maleic anhydride sodium salt aqueous system having styrene maleic anhydride sodium salt content of 0.5%, forming O/W emulsion, wherein the mass ratio of the oily blended powder slurry to the aqueous system was 1:2, and the particle size D90 of the emulsified emulsion was 1.905 m.

(52) 3) Preparation of the composite slurry. The oily blended powder slurry emulsion was added to a urea-formaldehyde resin prepolymer, reacted at 70-80 C. with sufficiently stirring, so that the urea-formaldehyde resin prepolymer crossly link to prepare a plant composite slurry, which is composed of the oily blended powder slurry emulsion obtained using thyme, fennel and Litsea cubeba as plant sources being a capsule core and the urea-formaldehyde resin being a capsule wall, wherein the ratio of the total mass amount of the fennel extract, the Litsea cubeba extract and the thyme essential oil to the mass of the urea-formaldehyde resin prepolymer was 2:1, the particle size D90 of the multi-functional composite slurry was 2.443 m, and the solid content was 36.8%.

(53) 2. The Step for Preparing a Blended Spinning Dope by Blending the Composite Slurry and a Denatured Cellulose Spinning Dope

(54) 1) The Step for Preparing a Denatured Cellulose Spinning Dope

(55) Cellulose pulps were used as raw materials. A viscose dope was prepared through a viscose preparation process, and a denaturant was added into the viscose dope for denaturation to prepare a denatured cellulose spinning dope. The polymerization degree of the cellulose pulps was 937. The denaturant used was a polyoxyethylene compound and the ratio of the addition amount to the mass of the -cellulose in the viscose dope was 0.78%. The viscosity of the denatured cellulose spinning dope was 88 s and the degree of esterification was 81.

(56) 2) The Step for Blending to Prepare a Blend Spinning Dope

(57) The composite slurry prepared in step 1 was added to the denatured cellulose spinning dope prepared in step 2 through a pre-spinning injection system, wherein the pre-spinning injection system comprised a filtering device, a metering device and a mixing device to achieve the filtration of the plant composite slurry, precise metering, and homogeneously mixing with the denatured cellulose spinning dope. The mass ratio of the composite slurry to -cellulose in the denatured cellulose spinning dope was 8.9%. The particle size of the particles allowed to pass through the filter device of the pre-spinning injection system was 2.852 m. The mixing device consisted of a dynamic mixer and a static mixer linked in series, and the mixing time was 196 s.

(58) 3. Spinning and Post-Treatment

(59) The blended spinning dope was spun through a adjusted coagulation bath, and the primary tow was drafted to obtain a shaped tow. The resulting tow was cut, subjected to a mild desulfurization process, transferred to an oil bath and refining baths such as for water washing. A plant regenerated cellulose fiber having anti-bacteria, anti-mite and anti-mould functions was obtained after drying.

(60) The coagulation bath temperature was 36 C. The coagulation bath composition consisted of 7.2% of sulfuric acid, 0.78% of aluminum sulphate, 13.8% of sodium sulphate and 0.32% of polyoxyethylene compounds with the balance being water.

(61) The fiber had a repellent rate of 95% and a inhibitory rate of 94% against mites. The anti-mould level could reach 0 level. The antibacterial activity value was 2.7, and the bactericidal activity value was 0.6. The fiber had a fiber degree of polymerization of 475, a dry breaking strength of 3.09 cN/dtex, a variation coefficient of dry strength of 13.3%, a wet strength of 1.75 cN/dtex, a hooking strength of 0.98 cN/dtex and a wet modulus of 0.40 cN/dtex.

Example 5

(62) A method for preparing regenerated cellulose fibers having anti-bacteria, anti-mite and anti-mould functions with a specification of 2.22 dtex38 mm, comprising the steps of:

(63) 1. The Preparation Step of a Composite Slurry

(64) 1) a fennel extract and a Litsea cubeba extract were mixed, crushed, ground to obtain a blended powder of the two for future use, wherein the mass ratio of the fennel extract to the Litsea cubeba extract in blended powder was 1:1.5, and the particle size D90 of the blended powder was 1.568 m.

(65) 2) The above prepared blended powder and a thyme essential oil were blended homogeneously, so that the surface of the blended powder was covered with a layer of the thyme essential oil to prepare a oily blended powder slurry, wherein the mass ratio of the blended powder to the thyme essential oil was 10:1.

(66) The above oily blended powder slurry was added into an emulsifier, a styrene maleic anhydride sodium salt aqueous system having styrene maleic anhydride sodium salt content of 0.5%, forming O/W emulsion, wherein the mass ratio of the oily blended powder slurry to the aqueous system was 1:5, and the particle size D90 of the emulsified emulsion was 2.038 m.

(67) 3) Preparation of the composite slurry. The oily blended powder slurry emulsion was added to a urea-formaldehyde resin prepolymer, reacted at 70-80 C. with sufficiently stirring, so that the urea-formaldehyde resin prepolymer crossly link to prepare a plant composite slurry, which is composed of the oily blended powder slurry emulsion obtained using thyme, fennel and Litsea cubeba as plant sources being a capsule core and the urea-formaldehyde resin being a capsule wall, wherein the ratio of the total mass amount of the fennel extract, the Litsea cubeba extract and the A thyme essential oil to the mass of the urea-formaldehyde resin prepolymer was 3:1, the particle size D90 of the multi-functional composite slurry was 2.562 m, and the solid content was 39.9%.

(68) 2. The Step for Preparing a Blended Spinning Dope by Blending the Composite Slurry and a Denatured Cellulose Spinning Dope

(69) 1) The Step for Preparing a Denatured Cellulose Spinning Dope

(70) Cellulose pulps were used as raw materials. A viscose dope was prepared through a viscose preparation process, and a denaturant was added into the viscose dope for denaturation to prepare a denatured cellulose spinning dope. The polymerization degree of the cellulose pulps was 1000. The denaturant used was a polyoxyethylene compound and the ratio of the addition amount to the mass of the -cellulose in the viscose dope was 1.0%. The viscosity of the denatured cellulose spinning dope was 96 s and the degree of esterification was 85.

(71) 2) The Step for Blending to Prepare a Blend Spinning Dope

(72) The composite slurry prepared in step 1 was added to the denatured cellulose spinning dope prepared in step 2 through a pre-spinning injection system, wherein the pre-spinning injection system comprised a filtering device, a metering device and a mixing device to achieve the filtration of the plant composite slurry, precise metering, and homogeneously mixing with the denatured cellulose spinning dope. The mass ratio of the composite slurry to -cellulose in the denatured cellulose spinning dope was 10.0%. The particle size of the particles allowed to pass through the filter device of the pre-spinning injection system was 2.968 m. The mixing device consisted of a dynamic mixer and a static mixer linked in series, and the mixing time was 300 s.

(73) 3. Spinning and Post-Treatment

(74) The blended spinning dope was spun through a adjusted coagulation bath, and the primary tow was drafted to obtain a shaped tow. The resulting tow was cut, subjected to a mild desulfurization process, transferred to an oil bath and refining baths such as for water washing. A plant regenerated cellulose fiber having anti-bacteria, anti-mite and anti-mould functions was obtained after drying.

(75) The coagulation bath temperature was 40 C. The coagulation bath composition consisted of 8.0% of sulfuric acid, 1.0% of aluminum sulphate, 16.0% of sodium sulphate and 0.5% of polyoxyethylene compounds with the balance being water.

(76) The fiber had a repellent rate of 98% and a inhibitory rate of 98% against mites. The anti-mould level could reach 0 level. The antibacterial activity value was 2.8, and the bactericidal activity value was 0.7. The fiber had a fiber degree of polymerization of 450, a dry breaking strength of 2.89 cN/dtex, a variation coefficient of dry strength of 13.6%, a wet strength of 1.68 cN/dtex, a hooking strength of 0.90 cN/dtex and a wet modulus of 0.38 cN/dtex.

(77) It should be understood that the foregoing descriptions are merely illustrative of preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention is described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that, the technical solutions described in the foregoing embodiments may be modified. Any modification, equivalent substitution, or improvement made without departing from the spirit and principle of the present invention shall fall within the protection scope of the present invention.