CN1304653C - Antibacterial humidity-guide polyester fiber, and its preparing method and use - Google Patents

Abstract

The present invention discloses an anti-bacterial humidity-conducting polyester fiber, a preparation method thereof and the application thereof. The anti-bacterial humidity-conducting polyester fiber disclosed in the present invention is composed of 0.5 to 3 portions by weight of modified antibiotic additive and 99.5 to 97 portions by weight of polyester fiber forming resin. The fiber has the fineness of less than 3.0 dtex, the strength of larger than 3.4 cN/dtex, the modulus of 95.33 cN/dtex when the elongation is 1%, the anti-bacterial rate of more than 90%, the ash content of larger than 94.7%, and the fiber abnormity of 37.4%; the porosity among fibers can reach 40.9%. Compared with polyester fibers with common fineness, the humidity-conducting rate of the present invention is improved by more than 10 %, namely that the climbing height is more than 8.0cm in 30 minutes and the quick drying rate is above 99% in 15 minutes. The anti-bacterial humidity-conducting fiber can be applied to the fields of clothes, decoration and industry for manufacturing anti-bacterial clothes with medical application, comfortable anti-bacterial underclothes and underpants, humidity-conducting anti-bacterial socks, bedroom articles, etc.

Description

A kind of antibacterial and moisture-conducting polyester fiber and its preparation method and application

technical field

The invention relates to the field of fibers, in particular to an antibacterial and moisture-conducting polyester fiber, a preparation method and application thereof.

Background technique

Polyester (PET) fiber is increasingly valued by people because of its low cost, excellent performance and wide application. Americans began to produce polyester in 1953. By 2002, the total output of polyester fiber in the world was 18.825 million tons, including 10.719 million tons of filament. Polyester has become the most widely used fiber. In recent years, many modification methods have been proposed for PET fibers to make woven fabrics and clothing more comfortable and hygienic to wear. However, for a long time, PET fibers cannot realize the coexistence of multiple functions, which limits the diversification of fabric varieties. In recent years, breakthroughs have been made in the research on the improvement of moisture conduction and antibacterial properties of PET fibers. It has aroused the attention of scholars at home and abroad, but no reports have been seen so far.

Usually, there are several ways to solve the moisture conduction of polyester fibers: one is to introduce hydrophilic groups through methods such as copolymerization (including grafting and block copolymerization), blending, and surface coating; the other is to change the fiber The cross-sectional shape (trilobal, cross, king, hollow, etc.) reduces the number of single filaments and makes the inside of the fiber have a microporous structure. The purpose is to change the smooth and complete surface structure of polyester, and use the principle of microporous capillary water absorption to increase specific surface area. In practical applications, in addition to using these two types of methods alone, there is a tendency to combine these two methods. At the same time, the different weaving methods in the weaving process also have a great influence on the moisture conductivity of the fabric. On this basis, the development of fine denier fibers can also significantly improve the moisture conductivity of fibers. How to combine these processes reasonably to maximize the moisture-conducting capacity on the basis of controlling the complexity and cost of the process, so as to give people a comfortable feeling no matter whether it is cold or hot, has been mentioned on the agenda.

The current modification methods of polyester antibacterial fibers can be summarized into the following four aspects. One is to use chemical technology to graft antibacterial groups to reactive groups on the fiber surface. For substances that do not have reactive groups, reactive groups should be introduced to make the fibers have the conditions for chemical modification. The second is to use physical modification technology to make the antibacterial agent penetrate into the deeper part of the fiber surface. For example, the development of microporous fibers with rough surfaces is conducive to the penetration of antibacterial agents below the surface of the fibers during finishing. The antibacterial agent can also be added into the spinning oil during the spinning process, and the antibacterial agent can be contained in the part below the surface layer during the condensation shrinkage and drawing shrinkage of the fiber. The third is to spin out fibers after blending antibacterial agents with polyester chips, which is the main means of developing antibacterial fibers. Generally speaking, inorganic antibacterial agents are mostly used in polyester by melt spinning, while organic antibacterial agents are mostly used in post-treatment. Finally, the fourth method is the composite spinning technology. For core-sheath fibers, the antibacterial agent can only be added to the sheath layer, which not only saves raw materials, but also helps to maintain the basic properties of the fiber. For side-by-side fibers, a polymer doped with an antimicrobial agent can be used as a side-by-side component. Techniques as reported in the following literature:

1. Dai Jinming, Zhang Ruiping; Application of Antibacterial Materials in Textiles; Chemical Fiber and Textile Technology, March 2005, Issue 1; P31-34;

2. Li Yanfei, An Yushan; Antibacterial agents and antibacterial fabric processing methods and prospects; Shandong Textile Science and Technology, No. 6, 2003; P45-48;

3. Ji Xu, Xiong Jinyu; Research Progress of Antibacterial Agents; Practical Drugs and Clinics, Volume 8, Issue 1, 2005; P45-47

4. Shi Lifen, Zhang Yixin; Antibacterial fiber and its latest research progress; Textile Science and Technology Progress, Issue 1, 2005; P4-6;

5. Shi Hongliang; Discussion on using nanotechnology to develop antibacterial fibers; Industrial Textiles; Issue 6, 2001; P13-15;

6. Yu Zhenfei, Liu Jiping; Classification and Antibacterial Mechanism of Nano-inorganic Antibacterial Agents; China Personal Protective Equipment, Issue 3, 2004; P10-13;

7. Lu Diannan, Zhou Xuanrong, Xing Xiaodong, Wang Xiaogong, Liu Zheng; Cellulose fibers grafted with quaternary ammonium salt polymers on the surface—Studies on sterilization mechanism; Acta Polymer Sinica, No. 01, 2004;

The above literature reports are basically limited to unilaterally modifying the moisture conductivity or antibacterial properties of fibers, and cannot solve the whole process of how to organically combine the two.

Contents of the invention

The technical problem to be solved in the present invention is to disclose an antibacterial and moisture-conducting polyester fiber and its preparation method and application, so as to overcome the above-mentioned defects in the prior art.

The present invention controls the size of the dispersed phase of the antibacterial active ingredient of the modified antibacterial powder inside the special-shaped PET fiber to reach the nanometer level by designing the blending, spinning-drawing process, thereby improving the effect of the antibacterial powder under a certain addition ratio On the surface, the antibacterial properties of PET fibers are effectively improved, and the special shape, porosity, and moisture permeability of the fibers are improved by spinning with a spinneret with a special hole type, while maintaining the rigidity of the fibers and other physical and mechanical properties. Effectively realize the organic unity of polyester fiber's antibacterial property and special-shaped moisture permeability.

Technology of the present invention is realized like this:

An antibacterial and moisture-conducting polyester fiber is characterized in that the fiber is composed of 0.5-3 parts (by weight) of a modified antibacterial additive and 99.5-97 parts (by weight) of a polyester fiber-forming resin.

The modified antibacterial additive is a kind of antibacterial powder with zirconia (ZrO ₂ ) as the carrier, loaded with Ag ions, and contains P ₂ O ₅ , provided by Shanghai University, the brand is CYK-302, and the components are The weight ratio is:

Ag:P ₂ O ₅ :ZrO ₂ =0.05～0.1:1～1.05:1～1.05;

The polyester fiber-forming resin is a commercial polyester fiber-forming resin, and the PET fiber-forming resin prepared by Zhejiang Dapu Chemical Fiber Group can be selected, with a molecular weight of 20,000;

Preparation method of the present invention comprises the steps:

According to the weight ratio, the modified antibacterial additive and polyester fiber-forming resin are blended by twin-screw, blending temperature: 250-270°C, screw speed: 100-200rpm, extruded and pelletized to prepare antibacterial and moisture-conducting polyester fiber special resin chips ;

Polyester fibers with antibacterial and moisture-conducting special-shaped characteristics were prepared by spinning the above slices through a special-shaped spinneret-drawing two-step method.

Spinning conditions: spinning temperature 270-300°C, spinning speed 700-1200m/min; drafting conditions: hot plate temperature 75-85°C, hot plate temperature 150-160°C, draft ratio 3-4 times.

The special-shaped spinneret is produced by Shanghai Iridium Na Spinneret Co., Ltd.

The antibacterial and moisture-conducting fiber prepared by the above method has a fineness of <3.0dtex, a strength of >3.4cN/dtex, and a modulus of 95.33cN/dtex at 1% elongation; the average particle size of the modified antibacterial powder carrier is 750nm, and the antibacterial rate is high. More than 90%, ash > 94.7%; fiber irregularity is 37.4%, porosity between fibers can reach 40.9%. The moisture conductivity is more than 10% higher than that of ordinary denier polyester: 30 minutes climbing > 8.0cm; 15 minutes quick drying rate exceeds 99%.

The antibacterial and moisture-conducting fiber prepared by the above method can be applied to the preparation of medical antibacterial clothing, comfortable antibacterial underwear, moisture-conducting and antibacterial socks, dormitory supplies, etc., in the field of wearing, decoration and industry.

Detailed ways

Example 1

Raw material ratio: raw material source Weight (parts) _ZrO2 adsorption Ag ion modified antibacterial powder, brand CYK-302 Shanghai University 1 PET fiber-forming resin (molecular weight 20000) Provided by Zhejiang Dapu Chemical Fiber Group 99

Preparation steps:

According to the weight ratio, 1 part of modified antibacterial powder and 99 parts of PET fiber-forming resin were blended by SQ-2 plastic granulator of Shanghai Chemical Machinery No. 4 Plant (blending temperature: 260 ° C, screw speed, 100 rpm), extruded The special resin slices for antibacterial and moisture-conducting fibers were prepared by cutting and pelletizing.

The above-mentioned chips are spun through a special-shaped spinneret-drawing two-step method to prepare PET special-shaped fibers with high moisture permeability and antibacterial nanoscale dispersion. Spinning conditions: spinning plate (PRB100-36 hole-+ font 0.8mm hole diameter of Shanghai Iridium Na Spinneret Co., Ltd.), compound spinning machine of Japan ABE Company, spinning temperature: 280°C, spinning speed: 800m/min , The number of spinneret holes is 36 holes. Drawing conditions: German Barmag drawing machine, hot plate temperature 75-85°C, hot plate temperature 150-160°C, drafting ratio 3.5 times.

The antibacterial and moisture-conducting fiber prepared by the above method is tested by the method specified in the literature, and the results are as follows: the fineness <3.0dtex, the strength can be as high as 3.4cN/dtex, and the modulus at 1% elongation can reach 95.33cN/dtex ((according to People's Republic of China Textile Industry Standard and Test Standard GB/T14343-2003; FZ/T50002-1991); modified antibacterial Ag ionophore average dispersed phase size in PET matrix <400nm, antibacterial Ag ion <100nm (electron microscopic analysis) The degree of fiber irregularity is 37.4%, the porosity between fibers can reach 40.9% (chemical fiber irregularity test method FZ/T50002-1991), and the moisture conductivity is more than 10% higher than that of ordinary denier polyester (according to the textile industry standards of the People's Republic of China and Test standard: JISL1096-1990 6.26.1.A); 30 minutes climb > 8.0cm (according to the textile industry standard of the People's Republic of China and textile capillary effect test method: ZB W 04019-90); 15 minutes quick drying rate exceeds 99% (According to the textile industry standards and testing standards of the People's Republic of China: JISL1096-1990 6.25.1A).

Example 2

Raw material ratio: raw material source Weight (parts) _ZrO2 adsorption Ag ion modified antibacterial powder, brand CYK-302 Shanghai University 1.5 PET fiber-forming resin (molecular weight 20000) Provided by Zhejiang Dapu Chemical Fiber Group 98.5

Preparation steps:

According to the weight ratio, 1.5 parts of modified antibacterial powder and 98.5 parts of PET fiber-forming resin were blended by SQ-2 plastic granulator of Shanghai Chemical Machinery No. 4 Plant (blending temperature: 260°C, screw speed, 100rpm), The special resin slices for antibacterial and moisture-conducting fibers were prepared by cutting and pelletizing.

The above-mentioned chips are spun through a special-shaped spinneret-drawing two-step method to prepare PET special-shaped fibers with high moisture permeability and antibacterial nanoscale dispersion. Spinning conditions: spinning plate (PRB100-36 hole-+ font 0.8mm aperture of Shanghai Iridium Na Spinneret Co., Ltd.) composite spinning machine of Japan ABE Company, spinning temperature: 283°C, spinning speed: 1000m/min, The number of spinneret holes is 48. Drawing conditions: German Barmag drawing machine, hot plate temperature 78-88°C, hot plate temperature 150-170°C, drafting ratio 3.5 times.

The antibacterial and moisture-conducting fiber prepared by the above method was tested by the method specified in the literature, and the results are as follows:

The denier is less than 2.4dtex, the strength can be as high as 3.56cN/dtex, and the modulus at 1% elongation can reach 105.33cN/dtex (according to the textile industry standards and testing standards of the People's Republic of China GB/T14343-2003; FZ/T50002-1991); The average size of the dispersed phase of the modified antibacterial Ag ion carrier in the PET matrix is less than 400nm, and the antibacterial Ag ion is less than 100nm (electron microscopic analysis). The degree of fiber irregularity is 28.4%, the porosity between fibers can reach 35.4%, (chemical fiber irregularity test method FZ/T 50002-1991) the moisture conductivity is more than 10% higher than that of ordinary denier polyester (according to the textile industry standards of the People's Republic of China and Test standard: JISL1096-1990 6.26.1.A): 30 minutes climb > 7.8cm (according to the textile industry standard of the People's Republic of China and textile capillary effect test method: ZB W 04019-90); 15 minutes quick drying rate exceeds 99% (According to the textile industry standards and testing standards of the People's Republic of China: JISL1096-19906.25.1A).

Example 3

Raw material ratio: raw material source Weight (parts) _ZrO2 adsorption Ag ion modified antibacterial powder, brand CYK-302 Shanghai University 0.8 PET fiber-forming resin (molecular weight 20000) Provided by Zhejiang Dapu Chemical Fiber Group 99.2

Preparation steps:

According to the weight ratio, 0.8 parts of modified antibacterial powder and 99.2 parts of PET fiber-forming resin were blended by SQ-2 plastic granulator of Shanghai Chemical Machinery No. The special resin slices for antibacterial and moisture-conducting fibers were prepared by cutting and pelletizing.

The above-mentioned chips are spun through a special-shaped spinneret-drawing two-step method to prepare PET special-shaped fibers with high moisture permeability and antibacterial nanoscale dispersion. Spinning conditions: spinning plate (PRB100-36 hole-+ font 0.8mm aperture of Shanghai Iridium Na Spinneret Co., Ltd.) composite spinning machine of Japan ABE Company, spinning temperature: 279 ° C, spinning speed: 900m/min, The number of spinneret holes is 36. Drawing conditions: German Barmag drawing machine, hot plate temperature 75-85°C, hot plate temperature 150-160°C, drafting ratio 3.3 times.

The antibacterial and moisture-conducting fiber prepared by the above method is tested by the method specified in the literature, and the results are as follows: the fineness <3.2dtex, the strength can be as high as 3.2cN/dtex, and the modulus at 1% elongation can reach 94.33cN/dtex ((according to People's Republic of China Textile Industry Standard and Test Standard GB/T14343-2003; FZ/T50002-1991); modified antibacterial Ag ionophore average dispersed phase size in PET matrix <400nm, antibacterial Ag ion <100nm (electron microscopic analysis) The degree of fiber irregularity is 34.4%, the porosity between fibers can reach 37% (chemical fiber irregularity test method FZ/T50002-1991), and the moisture conductivity is more than 10% higher than that of ordinary denier polyester (according to the textile industry standards of the People's Republic of China and Test standard: JISL1096-1990 6.26.1.A); 30 minutes climb > 7.5cm (according to the textile industry standard of the People's Republic of China and textile capillary effect test method: ZB W 04019-90); 15 minutes quick drying rate exceeds 99% (According to the textile industry standards and testing standards of the People's Republic of China: JISL1096-1990 6.25.1A).

Claims (4)

1. an antibacterial humidity-guide polyester fiber is characterized in that, described fiber is made up of 0.5～3 part of (weight) modification antibacterial additives and 99.5～97 parts of (weight) Terylene fiber resins;

Described modification antibacterial additives be a kind of be carrier with the zirconia, load has the antimicrobial powder of Ag ion, and contains P ₂O ₅, the weight ratio of component is:

Ag∶P ₂O ₅∶ZrO ₂＝0.05～0.1∶1～1.05∶1～1.05；

The fiber number of described fiber is 3.0～1.3dtex, and the fiber degree of profile is for being 20～37.4%, and porosity is 35.4～40.9% between fiber;

Modification antimicrobial powder carrier average dispersed phase size in matrix is 750nm.

2. the preparation method of antibacterial humidity-guide polyester fiber according to claim 1 is characterized in that, comprises the steps:

(1) with modification antibacterial additives and Terylene fiber resin blend, with conventional extrude, pellet cutting method makes resin slicer;

(2), make target product by spinning, drawing-off two steps with the special-shaped spinning plate of above-mentioned section through routine;

Blending temperature is 250～270 ℃, and screw speed is 100～200rpm, and spinning condition is: 270～300 ℃ of spinning temperatures, spinning speed 700～1200m/min; Described draw conditions is: 75～85 ℃ of temperature of heat plate, 150～160 ℃ of hot plate temperatures, 3～4 times of drafting multiples.

3. preparation method according to claim 2 is characterized in that, the amount of described modification antibacterial additives is 0.5～3 part (weight), and the amount of Terylene fiber resin is 99.5～97 parts (weight).

4. the application of antibacterial humidity-guide polyester fiber according to claim 1 is characterized in that, is used to prepare medical antibacterial clothes, comfortable antibacterial underwear underpants, leads wet antibiotic socks or dormitory articles.