阅读说明：本技术 一种抗菌隔菌smms复合无纺布 (Antibacterial and antimicrobial SMMS composite non-woven fabric ) 是由 陆生平 王晓东 徐晓伟 汤雪峰 于 2019-10-21 设计创作，主要内容包括：本发明涉及一种抗菌隔菌SMMS复合无纺布,是由第一纺粘无纺布层、第一熔喷层、第二熔喷层和第二纺粘无纺布层复合而成,所述第一纺粘无纺布层和第二纺粘无纺布层分别为上表层和下表层,所述第一熔喷层和第二熔喷层为中间层,所述纺粘无纺布层和熔喷层均以聚丙烯为原料,同时添加抗菌剂加工而成,所述抗菌剂为聚六亚甲基胍与γ-聚谷氨酸的化学-生物复合抗菌剂。本发明的SMMS复合无纺布具有抗菌隔菌功能,上下两表层采用纺粘无纺布层可以保证具有一定的强度,抗撕裂性能好,耐磨擦性能好,中间层采用双层熔喷,保证的防渗透性能的同时还有较好的透气及隔菌性能,对细菌不产生抗性,使用安全可靠。(The invention relates to an antibacterial and bacterium-isolating SMMS composite non-woven fabric which is formed by compounding a first spun-bonded non-woven fabric layer, a first melt-blown layer, a second melt-blown layer and a second spun-bonded non-woven fabric layer, wherein the first spun-bonded non-woven fabric layer and the second spun-bonded non-woven fabric layer are respectively an upper surface layer and a lower surface layer, the first melt-blown layer and the second melt-blown layer are intermediate layers, the spun-bonded non-woven fabric layer and the melt-blown layer are both made of polypropylene and are processed by adding an antibacterial agent, and the antibacterial agent is a chemical-biological composite antibacterial agent of polyhexamethylene guanidine and gamma-polyglutamic acid. The SMMS composite non-woven fabric has an antibacterial and bacterium-isolating function, the upper surface layer and the lower surface layer adopt spun-bonded non-woven fabric layers to ensure certain strength, the tear resistance is good, the abrasion resistance is good, the middle layer adopts double-layer melt-blown, the permeability resistance is ensured, the air permeability and bacterium-isolating performance are good, the SMMS composite non-woven fabric does not generate resistance to bacteria, and the use is safe and reliable.)

1. The utility model provides an antibiotic compound non-woven fabrics that separates fungus SMMS which characterized in that: the antibacterial agent comprises a first spun-bonded non-woven fabric layer, a first melt-blown layer, a second melt-blown layer and a second spun-bonded non-woven fabric layer, wherein the first spun-bonded non-woven fabric layer and the second spun-bonded non-woven fabric layer are respectively an upper surface layer and a lower surface layer, the first melt-blown layer and the second melt-blown layer are intermediate layers, the first spun-bonded non-woven fabric layer, the first melt-blown layer, the second melt-blown layer and the second spun-bonded non-woven fabric layer respectively comprise polypropylene and an antibacterial agent, and the antibacterial agent is a chemical-biological composite antibacterial agent of polyhexamethylene guanidine and gamma-polyglutamic acid.

2. The antibacterial and antimicrobial SMMS composite non-woven fabric according to claim 1, which is characterized in that: the first spun-bonded non-woven fabric layer and the second spun-bonded non-woven fabric layer respectively comprise the following components in parts by mass:

polypropylene 99

Polyethylene 1

Flexibilizer 0.5

Polyhexamethylene guanidine 0.5

0.5 of gamma-polyglutamic acid

Heat stabilizer 0.5

Additive 2

Wherein the melt index of the polypropylene is 35g/10 min.

3. The antibacterial and antimicrobial SMMS composite non-woven fabric according to claim 1, which is characterized in that: the first melt-blown layer and the second melt-blown layer respectively comprise the following components in parts by mass:

polypropylene 99

Polyhexamethylene guanidine 1

0.5 of gamma-polyglutamic acid

Heat stabilizer 0.5

Additive 3

Wherein the melt index of the polypropylene is 1500g/10 min.

4. The antibacterial and antimicrobial SMMS composite non-woven fabric according to claims 1 to 3, which is characterized in that: the polyhexamethylene guanidine is one or more of polyhexamethylene guanidine hydrochloride and polyhexamethylene guanidine phosphate.

5. The antibacterial and antimicrobial SMMS composite non-woven fabric according to claim 2 or 3, which is characterized in that: the toughening agent is a polyolefin elastomer.

6. The antibacterial and antimicrobial SMMS composite non-woven fabric according to claim 2 or 3, which is characterized in that: the additive is a flame retardant and color master batches, the mass ratio of the flame retardant to the color master batches is 1:1, and the flame retardant is an ammonium polyphosphate flame retardant or an ammonium polyphosphate melamine flame retardant.

7. The antibacterial and antimicrobial SMMS composite non-woven fabric according to claim 2 or 3, which is characterized in that: the heat stabilizer is a phenol heat stabilizer or a thioester heat stabilizer.

8. A method for preparing the antibacterial and antimicrobial SMMS composite nonwoven fabric of any one of claims 1 to 7, comprising the following steps: the method comprises the following steps:

(1) spunbond nonwoven material: putting the components of the spunbonded non-woven fabric layer into a screw extruder for melt extrusion, filtering a melt through a filter and metering through a metering pump, spinning through a spinning box, cooling and drafting through cold air flow, and uniformly laying on a net curtain of a net forming machine through a diffusion air duct to form a filament fiber net;

(2) melt-blown material: the components of the melt-blown layer are put into a screw extruder for melt extrusion, the melt is filtered by a filter and metered by a metering pump, is spun by a spinning box, is drafted by air flow, and is uniformly laid on a net curtain of a net forming machine through a diffusion air channel, so that superfine fibers are formed;

(3) SMMS composite non-woven fabric: and (3) sequentially arranging the products obtained in the step (1) and the step (2) into a spun-bonded non-woven fabric material, a melt-blown material and a spun-bonded non-woven fabric material from top to bottom, and then carrying out hot rolling, slitting and rolling to obtain the SMMS composite non-woven fabric.

9. The preparation method of the antibacterial and antimicrobial SMMS composite non-woven fabric according to claim 8 is characterized in that: in the step (1), the spinning temperature is 215-235 ℃, the temperature of the air flow is 15-18 ℃, the drafting speed is 5000-7000 m/min, and the drafting distance is 2-4 m.

10. The preparation method of the antibacterial and antimicrobial SMMS composite non-woven fabric according to claim 8 is characterized in that: in the step (2), the spinning temperature is 265-285 ℃, the temperature of the air flow is 190-210 ℃, the drafting speed is 25000-35000 m/min, and the drafting distance is 10-30 cm.

Technical Field

The invention belongs to the technical field of non-woven fabrics, and particularly relates to an antibacterial and bacterium-isolating SMMS composite non-woven fabric.

Background

At present, disposable products such as medical protective clothing, isolation gowns, surgical gowns and the like are generally made of single-layer or double-layer non-woven cotton nets, or composite non-woven fabrics which are formed by adding a plastic film layer between two layers of non-woven fabrics and then are bonded by glue are adopted. The former has good air permeability, but has poor water resistance, alcohol resistance and plasma permeability resistance, is easy to cause the invasion of bacteria and viruses, has poor strength and is easy to tear; on the contrary, the middle plastic film increases the anti-permeability performance and the strength, so that the air permeability is poor and the wearing and the use are extremely uncomfortable; in addition, the material is used as a disposable product, is difficult to degrade and is easy to pollute the environment. Meanwhile, in order to meet the requirement of the antibacterial performance of disposable products such as medical protective clothing, isolation gowns, surgical gowns and the like, an antibacterial agent is generally added, and the added antibacterial agent is a chemical antibacterial agent, so that bacteria can generate resistance easily, and the negative effect is large.

Chinese patent CN 108486875a discloses an antibacterial non-woven fabric for medical hygiene, a preparation method and an application thereof, the antibacterial non-woven fabric for medical hygiene is obtained by soaking the non-woven fabric in an antibacterial finishing liquid and then drying, has antibacterial and bactericidal capabilities, and can be used for medical articles such as surgical gowns, protective clothing, masks and the like, but has the following defects: (1) the adopted non-woven fabric is made of cotton, terylene, polypropylene, chinlon, spandex or acrylon, and has poor waterproofness, alcohol resistance and plasma permeability resistance, so that the invasion of bacteria and viruses is easily caused; (2) the antibacterial agent is 1-chloro-3-hydroxymethyl-5-epoxypropyl-S-triazine trione and/or 2-chloro-4- (4-sulfophenylamino) -6- (3-hydroxypropyl-5, 5-dimethylhydantoin) -1, 3, 5-triazine, and all of the antibacterial agents are chemical antibacterial agents, so that bacteria can generate resistance easily, and the negative effect is large; (3) the preparation method of the antibacterial non-woven fabric is to dip the non-woven fabric in the antibacterial finishing agent and then dry the non-woven fabric, and the working procedures are complicated.

Disclosure of Invention

The invention aims to provide an antibacterial and antibacterial SMMS composite non-woven fabric which has the advantages of antibacterial, anti-seepage and air permeation, certain strength, good tear resistance and good abrasion resistance of the inner surface and the outer surface, and is suitable for being used as disposable products such as medical protective clothing, isolation clothing, operating clothing and the like.

The technical scheme adopted by the invention for solving the problems is as follows: the antibacterial agent comprises a first spun-bonded non-woven fabric layer, a first melt-blown layer, a second melt-blown layer and a second spun-bonded non-woven fabric layer, wherein the first spun-bonded non-woven fabric layer and the second spun-bonded non-woven fabric layer are respectively an upper surface layer and a lower surface layer, the first melt-blown layer and the second melt-blown layer are intermediate layers, the first spun-bonded non-woven fabric layer, the first melt-blown layer, the second melt-blown layer and the second spun-bonded non-woven fabric layer respectively comprise polypropylene and an antibacterial agent, and the antibacterial agent is a chemical-biological composite antibacterial agent of polyhexamethylene guanidine and gamma-polyglutamic acid.

Preferably, the first spun-bonded non-woven fabric layer and the second spun-bonded non-woven fabric layer both comprise the following components in parts by mass:

polypropylene 99

Polyethylene 1

Flexibilizer 0.5

Polyhexamethylene guanidine 0.5

0.5 of gamma-polyglutamic acid

Heat stabilizer 0.5

Additive 2

Wherein the melt index of the polypropylene is 35g/10 min.

Preferably, the first melt-blown layer and the second melt-blown layer both comprise the following components in parts by mass:

polypropylene 99

Polyhexamethylene guanidine 1

0.5 of gamma-polyglutamic acid

Heat stabilizer 0.5

Additive 3

Wherein the melt index of the polypropylene is 1500g/10 min.

Preferably, the polyhexamethylene guanidine is one or more of polyhexamethylene guanidine hydrochloride and polyhexamethylene guanidine phosphate.

Preferably, the toughening agent is a polyolefin elastomer.

Preferably, the additive is a flame retardant and a color master batch, the mass ratio of the flame retardant to the color master batch is 1:1, and the flame retardant is an ammonium polyphosphate flame retardant or an ammonium polyphosphate melamine flame retardant.

Preferably, the heat stabilizer is a phenolic heat stabilizer or a thioester heat stabilizer.

The invention also aims to provide a preparation method of the antibacterial and antimicrobial SMMS composite non-woven fabric, which comprises the following steps:

(1) spunbond nonwoven material: the components of the spunbonded non-woven fabric layer are put into a screw extruder for melt extrusion, the melt is filtered by a filter and metered by a metering pump, is spun by a spinning box, is cooled and drafted by cold air flow, and is uniformly laid on a net curtain of a net forming machine through a diffusion air duct, so that a filament fiber net is formed.

(2) Melt-blown material: the components of the melt-blown layer are put into a screw extruder for melt extrusion, the melt is filtered by a filter and metered by a metering pump, is spun by a spinning box, is drafted by air flow, and is uniformly laid on a net curtain of a net forming machine through a diffusion air duct, so that the superfine fiber is formed.

(3) SMMS composite non-woven fabric: and (3) sequentially arranging the products obtained in the step (1) and the step (2) into a spun-bonded non-woven fabric material, a melt-blown material and a spun-bonded non-woven fabric material from top to bottom, and then carrying out hot rolling, slitting and rolling to obtain the SMMS composite non-woven fabric.

Preferably, in the step (1), the spinning temperature is 215-235 ℃, the temperature of the air flow is 15-18 ℃, the drafting speed is 5000-7000 m/min, and the drafting distance is 2-4 m.

Preferably, in the step (2), the spinning temperature is 265-285 ℃, the temperature of the air flow is 190-210 ℃, the drafting speed is 25000-35000 m/min, and the drafting distance is 10-30 cm.

Compared with the prior art, the invention has the advantages that:

(1) according to the SMMS composite non-woven fabric, the upper surface layer and the lower surface layer adopt spun-bonded non-woven fabric layers, so that certain strength can be ensured, the tear resistance is good, and the abrasion resistance of the inner surface and the outer surface is good; 2 melt-blown non-woven fabric layers are adopted in the middle, so that better anti-seepage and isolation performance is ensured; the inner layer and the outer layer are added with the antibacterial material, so that the composite material has all functions of the original material and is added with the antibacterial performance.

(2) The invention adopts a biological-chemical composite antibacterial agent, the natural biological high molecular material gamma-polyglutamic acid and the polyhexamethylene guanidine have synergistic effect, the antibacterial capability of the antibacterial agent is greatly improved, the antibacterial and bacterium isolation effects can be effectively realized, and the antibacterial rate on escherichia coli, staphylococcus aureus and candida albicans reaches more than 99%; the use of the gamma-polyglutamic acid obviously reduces the threshold value of the effective amount of the polyhexamethylene guanidine, avoids the problem that bacteria can generate resistance in the antibacterial process, and is safe and reliable to use.

(3) The polyolefin elastomer is a saturated ethylene-octene blend, crystalline ethylene chain links in the structure of the blend are used as physical cross-linking points to bear load, amorphous ethylene and octene long chains contribute elasticity, and compared with other toughening agents, the toughening effect on polypropylene is more obvious.

Drawings

FIG. 1 is a process flow diagram of an SMMS composite nonwoven fabric of the present invention;

FIG. 2 is a schematic cross-sectional structure of an SMMS composite nonwoven fabric of the present invention;

wherein: 1 is a first spunbonded nonwoven layer; 2 is a first melt-blown layer; 3 is a second melt-blown layer; and 4 is a second spun-bonded non-woven fabric layer.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

As shown in fig. 1, a process flow diagram of the SMMS composite nonwoven fabric in this embodiment is shown.