CN113430674A

CN113430674A - Low-sensitization polyester fiber and preparation method thereof

Info

Publication number: CN113430674A
Application number: CN202110818900.7A
Authority: CN
Inventors: 梅山标; 黄熠; 陈秀苗
Original assignee: Shanghai Shuixing Home Textile Co Ltd
Current assignee: Shanghai Shuixing Home Textile Co Ltd
Priority date: 2021-07-20
Filing date: 2021-07-20
Publication date: 2021-09-24
Anticipated expiration: 2041-07-20
Also published as: CN113430674B

Abstract

A low-sensitization polyester fiber and a preparation method thereof relate to the field of materials. The preparation method of the low-sensitization polyester fiber comprises the steps of adding zinc oxide particles in the preparation process of the fiber, and controlling zinc ions to migrate to the surface to form a layered protective film. The fiber surface of the hypoallergenic polyester fiber contains zinc ions. The invention uses zinc oxide particles to construct a layered protective film to prevent the skin from contacting with the fiber containing the sensitizing substance, thereby effectively reducing the possibility of sensitization.

Description

Low-sensitization polyester fiber and preparation method thereof

Technical Field

The invention relates to the field of materials, in particular to preparation of low-sensitization polyester fibers.

Background

Skin allergy is an allergic reaction of the body, and is an abnormal reaction of people to normal substances (allergens), and people who contact the allergens have allergy, and the allergens include several hundreds of pollen, dust, foreign proteins, chemical substances, ultraviolet rays, clothes and the like.

As a fiber fabric closely contacted with the skin, if the anti-allergy performance of the fiber fabric can be improved, the risk of skin allergy can be effectively reduced. Therefore, technological innovation is needed for the polyester-based fiber, so that the sensitization possibility of the polyester-based fiber is reduced.

Disclosure of Invention

The invention aims to provide a preparation method of low-sensitization polyester fiber, so as to solve the technical problem.

The invention also aims to provide the low-sensitization polyester fiber prepared by the preparation method of the low-sensitization polyester fiber.

The technical problem solved by the invention can be realized by adopting the following technical scheme:

the preparation method of the low-sensitization polyester fiber is characterized in that zinc oxide particles are added in the preparation process of the fiber, and zinc ions are controlled to migrate to the surface to form a layered protective film.

Preferably, the addition method of the zinc oxide particles comprises the following steps: the diatomite particles and the zinc oxide particles are blended and melted with the polyester melt. The diatomaceous earth particles and zinc oxide particles are preferably surface modified prior to blending.

Preferably, the method of controlling the migration of zinc ions to a surface: and a liquid nitrogen cooling process and a torsion drawing process are added after spinning, so that zinc oxide particles with relatively low compatibility in the fiber can be rapidly transferred to the surface to form a layered protective film.

Has the advantages that: the invention uses zinc oxide particles to construct a layered protective film to prevent the skin from contacting with the fiber containing the sensitizing substance, thereby effectively reducing the possibility of sensitization. The zinc element can maintain the health of the skin and play a role in cleaning, and the zinc element loaded on the surface of the polyester fiber can ensure the lasting and effective functions and also has the effects of caring the skin, relieving pressure, performing physical therapy, relieving allergy and the like. Meanwhile, the zinc oxide has high-efficiency antifouling, antibacterial and other functions, and the pure natural diatomite and zinc ions act together to remove pathogenic bacteria and allergens, so that benign microorganisms and skin flora cannot be damaged, and the method is safe and effective.

A low-sensitization polyester fiber is characterized in that the surface of the fiber contains zinc ions.

The low-sensitization polyester fiber contains zinc oxide, diatomite and PET.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

Step one, zinc oxide particle surface modification

Adding zinc oxide particles into ethanol or water with the volume 2-5 times of the zinc oxide particles, ultrasonically dispersing for 0.5-2h, then adding a dispersing agent, uniformly mixing, adjusting the pH value to 5.5-6.5 by using glacial acetic acid, stirring and reacting for 10-20h at room temperature, wherein the rotating speed is 500-3000r/min, and centrifuging to obtain the modified zinc oxide particles. Wherein: the zinc oxide particles are preferably nanoscale zinc oxide particles. The dosage of the dispersant is preferably the following dispersant in percentage by mass: the zinc oxide particles are 1: 10. the dispersant is preferably sodium hexametaphosphate, sodium tripolyphosphate or sodium pyrophosphate.

Step two, diatomite particle surface modification

Adding water accounting for 500% of the mass of the diatomite particles into 200-. Wherein, the diatomite particles are preferably diatomite powder with the particle size of more than 500-2000 meshes. The modifier is preferably one or a mixture of more than two of beta-aminopropyl triethoxysilane, isobutyl triethoxysilane, glyceryl monostearate and alkylolamide.

Step three, preparing the composite modified particles

At room temperature, adding the modified zinc oxide particles into the modified diatomite slurry, then adding water, stirring for 1-2h at the rotation speed of 1000-3000 r/min, then heating to 60-80 ℃, and continuing stirring for 6-8h at the rotation speed of 2000-3000 r/min. Then the temperature is controlled to be 300-700 ℃, the drying is carried out until the water content is 0.1-2%, and the grinding is carried out until the granularity reaches 1600 meshes, thus obtaining the composite modified particles. The mass percentage of the modified zinc oxide particles and the modified diatomite sizing agent is 12.5 to 166.5 percent

Step four, blending and melting

And before spinning, blending and melting the composite modified particles and the polyester melt.

Preferably, a screw 44 length-diameter ratio micro screw extruder is arranged at the front end of the hot melt pump and is used for quantitatively adding powder into the hot melt pump. The polyester melt is preferably a PET melt. Wherein, the composite modified particles account for 1.5-5% of the PET slice by mass percent. The PET chips are melted at the temperature of 260-290 ℃ to prepare a PET melt, the micro screw extruder starts to supply materials, and the powder is extruded and mixed with the PET melt. The screw is reversely operated for 1-2 times every 10 minutes, a small amount of PET melt is reversely pushed to permeate into the feeding cavity every 1-2 seconds, so that the powder blended with the PET melt is spirally and linearly distributed in the powder hot melting pump, a large amount of powder suspended on the surface of the melt exists, when the powder is extruded through a spinneret orifice, inorganic powder is uniformly deposited on the surface and the inside of the fiber, and after the powder is drawn, the exposure of the functional powder is more obvious, thereby being beneficial to the performance of functionality. Fluorescent whitening agent, titanium dioxide, peregal O and other substances are not used in the spinning process, and the used silicone oil is hypoallergenic silicone oil. The zinc oxide has certain extinction and whitening effects.

Step five, torsion drawing

After the previous spinning process is completed, spiral torsion equipment needs to be added in the subsequent process. After the temperature of the fiber is raised by high-pressure steam under the damp and hot condition, the warp direction rotation of the monofilament is formed by the action of the rotating friction force of the rubber roller, and the twisting degree is 800-1500 rpm. Under the action of extremely strong twisting mechanics, the compatibility in the fiber is relatively low, the well-dispersed zinc oxide inorganic particles are extruded to the surface, and the diatomite particles treated by the silane coupling agent stay in the fiber and cannot move.

Step six, liquid nitrogen cooling

The twisted fiber immediately enters a liquid nitrogen box to be rapidly cooled to below room temperature, and is fixed on the surface to form a smooth and durable inorganic protective layer.

Step seven, subsequent treatment

The prepared fiber is subjected to conventional processes of drafting, washing, drying, cutting and the like to obtain the hypoallergenic fiber.

Low sensitization fiber Performance test

Test 1, antibacterial performance test, the test results are shown in table 1:

test 2, preparation of the fibers to 100g/m²The flocculus is tested, the heat preservation performance and the far infrared emissivity are tested, and the test results are shown in table 2:

test 3, the fibers were subjected to a hydrophobicity test, finding that: the prepared fiber has certain hydrophobicity, but the performance is gradually weakened along with illumination.

Test 4, sensitization testing of the fibers was performed according to GB 7919 cosmetic safety evaluation procedure and method, using the topical occlusive skin coating method in skin allergy testing. Under the present test conditions, the sensitization rate of the test sample to guinea pigs was 0%.

The results of the skin sensitization test are shown in table 3:

the foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The preparation method of the low-sensitization polyester fiber is characterized in that zinc oxide particles are added in the preparation process of the fiber, and zinc ions are controlled to migrate to the surface to form a layered protective film.

2. The method for preparing the hypoallergenic polyester fiber according to claim 1, wherein the zinc oxide particles are modified zinc oxide particles by a method comprising:

adding zinc oxide particles into ethanol or water with the volume 2-5 times of the zinc oxide particles, ultrasonically dispersing for 0.5-2h, then adding a dispersing agent, uniformly mixing, adjusting the pH value to 5.5-6.5 by using glacial acetic acid, stirring and reacting for 10-20h at room temperature, wherein the rotating speed is 500-3000r/min, and centrifuging to obtain the modified zinc oxide particles.

3. The method for producing a hypoallergenic polyester fiber according to claim 2, wherein: calculated according to the mass ratio, the dispersing agent: the zinc oxide particles are 1: 10.

4. the method for preparing hypoallergenic polyester fibers according to claim 2, characterized in that the zinc oxide particles are added by a method comprising: the diatomite particles and the zinc oxide particles are blended and melted with the polyester melt.

5. The method for preparing hypoallergenic polyester fibers according to claim 4, characterized in that the diatomite particles are surface-modified before blending:

adding water accounting for 500% of the mass of the diatomite particles into 200-.

6. The method for preparing hypoallergenic polyester fibers as claimed in claim 5, wherein the diatomite particles are diatomite powder of 500-2000 mesh or above.

7. The method for preparing hypoallergenic polyester fibers according to claim 4, wherein the diatomite particles and the zinc oxide particles are mixed and then melt-mixed with the PET chips:

adding modified zinc oxide particles into the modified diatomite slurry at room temperature, adding water, controlling the rotating speed to be 1000-80 ℃ and 1500r/min, stirring for 1-2h, then heating to be 60-80 ℃, controlling the rotating speed to be 2000-3000r/min, continuing stirring for 6-8h, then controlling the temperature to be 300-700 ℃, drying until the water content is 0.1-2%, and grinding until the particle size reaches 1600 meshes to obtain composite modified particles;

the composite modified particles account for 1.5-5% of the PET slice by mass percent; melting the PET slices at 260-290 ℃ to prepare a PET melt, feeding by using a miniature screw extruder, extruding the powder, and mixing with the PET melt; and reversely running the screw for 1-2 times every 10 minutes, reversely pushing a small amount of PET melt to permeate into the feeding cavity every 1-2 seconds, so that the powder blended with the PET melt is linearly distributed in a spiral shape in the powder hot melting pump, and a large amount of powder suspended on the surface of the melt exists, and when the powder is extruded through a spinneret orifice, the inorganic powder is uniformly deposited on the surface and the inside of the fiber.

8. The method for preparing hypoallergenic polyester fibers as claimed in any one of claims 1 to 7, characterized in that the method for controlling migration of zinc ions to the surface: and performing torsion drawing and liquid nitrogen cooling after spinning.

9. A low-sensitization polyester fiber is characterized in that the surface of the fiber contains zinc ions.

10. The hypoallergenic polyester fiber as claimed in claim 9, which contains zinc oxide, diatomaceous earth, PET.