CN107956138B - Revivable Antibacterial protection fabric and preparation method thereof - Google Patents

Abstract

The invention discloses a kind of revivable Antibacterial protection fabrics and preparation method thereof, belong to Tensile properties technical field.The protective fabric includes base cloth layer, elasticity transition layer and composite armor are successively arranged above base cloth layer, composite armor is the superfine fibre that modified polyolefine elastomer and polyurethane elastomer are combined, and modified polyolefine elastomer is that polyolefin elastomer is prepared through N- (3- dimethylamino-propyl) Methacrylamide graft modification and through chloramination processing；Elasticity transition layer is polyurethane elastomer composition, and preparation method is elastic polyurethane superfine fibre suspension and superfine fibre suspension well prepared in advance to be successively respectively coated on to the surface of base cloth layer, then handle through chloramination.The protective fabric of preparation can be used for medical matters protection field, such as prepare protective garment or protective gloves, Protective shoe cover.

Description

Renewable antibacterial protective fabric and preparation method thereof

technical field

The invention relates to a medical protective fabric, which belongs to the technical field of medical textile materials, in particular to a regenerable antibacterial protective fabric and a preparation method thereof.

Background technique

Effective medical protective materials in hospitals can cut off the possible infection hazards to medical staff caused by pathogens contained in infectious body fluids such as blood, urine, saliva, and washing fluid during surgery.

At present, there are three main types of materials for medical protective clothing in my country: ordinary non-woven fabrics, rubber or coated fabrics, and protective clothing made of flash evaporation one-time forming filter materials. Among them, the protection efficiency of protective clothing made of ordinary non-woven fabrics is only about 40%, which cannot meet the minimum requirements of the national standard; the filter material made by DuPont of the United States by flash evaporation has good protection performance, but the protection uniformity of the fabric is not enough , and the breathability and moisture permeability are very poor, which cannot meet the wearing needs of medical personnel, especially under the hot summer conditions.

Contents of the invention

In order to solve the above technical problems, the present invention discloses a regenerable antibacterial protective fabric with high comfort and excellent protective ability and a preparation method thereof.

In order to achieve the above object, the present invention discloses a regenerable antibacterial protective fabric, which includes a base fabric layer, an elastic transition layer and a composite protective layer are sequentially arranged above the base fabric layer, and the composite protective layer is modified by Superfine fibers made of polyolefin elastomers and polyurethane elastomers, the modified polyolefin elastomers are grafted and modified by N-(3-dimethylaminopropyl) methacrylamide And the composition of the product prepared by chloramination treatment; the elastic transition layer is composed of polyurethane elastomer.

Further, the thickness of the composite protective layer is 20-40 μm. If the thickness is too low, the protective performance will be reduced, and if the thickness is too high, the comfort will be reduced. Therefore, the thickness of the composite protective layer is preferably 20-40 μm.

Still further, in the composite protective layer, the mass ratio of the modified polyolefin elastomer to the polyurethane elastomer is 30:70 to 50:50, wherein the addition of the polyurethane elastomer is to increase the firmness of the composite protective layer Therefore, the addition ratio is too low to make the strength insufficient. However, the antibacterial ability of the composite protective layer comes from the chloramination of the polyolefin elastomer graft. Therefore, the antibacterial performance is not strong when the content of the polyolefin elastomer is low. In addition, polyolefin elastomers are hydrophobic polymers, and an appropriate proportion of polyolefin elastomers is extremely beneficial for improving the water repellency of the protective layer. Therefore, the mass ratio of modified polyolefin elastomers and polyurethane elastomers is controlled at 30: Between 70～50:50.

Furthermore, the fiber diameter of the superfine fiber compounded by the modified polyolefin elastomer and polyurethane elastomer is 700-1000nm, wherein, if the diameter of the superfine fiber is too small, it will lead to a significant increase in manufacturing difficulty and improve the The manufacturing cost of the protective fabric; when the diameter is too large, the gap between the fibers will be large, and the barrier ability to pathogens will be significantly reduced. Therefore, the fiber diameter of the ultrafine fiber is preferably 700-1000nm.

Furthermore, the thickness of the elastic transition layer is 5-8 μm. If the thickness of the elastic transition layer is too low, no effective bonding will be achieved, and if it is too thick, it will not have any substantial effect on the increase of bonding. Reduce the air permeability and comfort of the fabric, so the thickness of the elastic transition layer is preferably 5-8 μm.

As a technical preference of the technical solution of the present invention, the mass-number ratio of the modified polyolefin elastomer to the polyurethane elastomer is 30:70;

The thickness of the composite protective layer is 40 μm;

The fiber diameter of the superfine fiber compounded by the modified polyolefin elastomer and the polyurethane elastomer is 700nm.

As another technical preference of the technical solution of the present invention, the mass-number ratio of the modified polyolefin elastomer to the polyurethane elastomer is 50:50;

The thickness of the composite protective layer is 80 μm;

The fiber diameter of the superfine fiber compounded by the modified polyolefin elastomer and the polyurethane elastomer is 1000nm.

In order to better realize the technical purpose of the present invention, the present invention also discloses a preparation method of a regenerable antibacterial protective fabric, which includes the following steps:

1) Preparation of modified polyolefin elastomer masterbatch: blend polyolefin elastomer masterbatch with a mass ratio of 5 to 8:100 and N-(3-dimethylaminopropyl)methacrylamide, and remelt Prepare modified polyolefin elastomer masterbatch by extrusion;

2) Preparation of superfine fiber suspension: take the modified polyolefin elastomer masterbatch with a mass ratio of 30:70 to 50:50 and mix it with polyurethane elastomer masterbatch, then blend with cellulose acetate butyrate, pass The superfine fiber is prepared by the melt co-extrusion phase separation method, and then the superfine fiber is dispersed into the water phase by high-speed shearing to prepare the superfine fiber suspension;

3) Preparation of elastic polyurethane ultrafine fiber suspension: take polyurethane elastomer masterbatch and cellulose acetate butyrate blend, prepare elastic polyurethane ultrafine fiber by melt coextrusion phase separation method, and then elastic polyurethane ultrafine fiber High-speed shear dispersion into the water phase to prepare elastic polyurethane microfiber suspension;

4) Preparation of regenerable antibacterial protective fabric: take the elastic polyurethane microfiber suspension prepared in step 3) and evenly coat the surface of the base cloth layer, and obtain an elastic transition layer with a thickness of 5-8 μm after drying, and then The surface of the transition layer is uniformly coated with the superfine fiber suspension prepared in step 2), and after drying, a composite protective layer with a thickness of 20-40 μm is obtained, and then the composite protective layer is treated with sodium hypochlorite solution at room temperature for chloramination to prepare Get Renewable Antimicrobial Protective Fabric.

Further, in step 4), the composite protective layer is immersed in a sodium hypochlorite solution with a mass concentration of 8-12%, treated at room temperature for 15-20 minutes, taken out and dried to prepare a regenerable antibacterial protective fabric.

Still further, in the step 2), the fiber diameter of the superfine fiber compounded by the modified polyolefin elastomer and the polyurethane elastomer is 700-1000 nm.

As a preference of the technical solution of the present invention, the particle size of the polyurethane elastomer masterbatch, polyolefin elastomer masterbatch and modified polyolefin elastomer masterbatch is not limited.

The melt co-extrusion phase separation method is a common preparation method for thermoplastic nanofibers. The mixed polymer melt is elongated and deformed by the shear and tensile composite force field in the extruder and spinneret to form nanofiber bundles. Finally, the matrix polymer is removed to obtain the desired type of thermoplastic nanofibers. fiber.

The principle of preparation method of the present invention:

1. Pure polyolefin elastomer is used alone, its polarity is weak, and the ultrafine fiber prepared by pure polyolefin elastomer cannot form a film or the formed film is easily disintegrated in the water phase system; while polyurethane elastomer contains strong Polar urethane base, good film-forming property, good oil resistance, toughness, wear resistance, aging resistance and adhesion, therefore, adding elastic polyurethane to polyolefin elastomer microfiber suspension Ultrafine fibers can effectively improve the film-forming and film-forming firmness.

2. It is necessary to add elastic polyurethane microfiber as a transition layer between the composite protective layer and the base cloth layer of ordinary cotton fabric, because although the suspension of elastic polyolefin microfiber and elastic polyurethane microfiber is mixed The film-forming property is good, but the adhesion between the composite protective layer and the cotton fabric base cloth layer is not strong enough, it is easy to peel off, and the service life is reduced. Add elastic polyurethane between the composite protective layer and the cotton fabric base cloth layer The superfine fiber transition layer is used for bonding and transition, so that the bonding force between the composite protective layer and the cotton fabric base cloth layer is significantly enhanced, and the service life can be effectively improved.

Beneficial effect:

1. The regenerable antibacterial protective fabric prepared by the present invention not only has good antibacterial rate and bacterial barrier rate, but also when the protective fabric loses antibacterial ability or weakens antibacterial ability, it can be chloraminated with sodium chlorate again to obtain effective The regenerated antibacterial ability effectively reduces the cost of a single use.

2. The regenerable antibacterial protective fabric prepared by the present invention can be used in the field of medical protection, such as preparing protective clothing or protective gloves, protective shoe covers, etc.

Description of drawings

Fig. 1 is the structural representation of regenerable antibacterial protective fabric of the present invention;

Wherein, the labeling of each component in the above figure is as follows:

Base fabric layer 1, elastic transition layer 2, composite protection layer 3.

Detailed ways

The invention discloses a method for preparing a regenerable antibacterial protective fabric. The preparation process includes the following steps:

1) Preparation of modified polyolefin elastomer masterbatch: blend polyolefin elastomer masterbatch with N-(3-dimethylaminopropyl) methacrylamide, remelt and extrude to obtain modified polyolefin elastomer body masterbatch;

2) Preparation of superfine fiber suspension: take modified polyolefin elastomer masterbatch and polyurethane elastomer masterbatch, mix with cellulose acetate butyrate, and prepare superfine fiber by melt coextrusion phase separation method, Then disperse the ultrafine fiber into the water phase through high-speed shearing to prepare the ultrafine fiber suspension;

3) Preparation of elastic polyurethane ultrafine fiber suspension: take polyurethane elastomer masterbatch and cellulose acetate butyrate blend, prepare elastic polyurethane ultrafine fiber by melt coextrusion phase separation method, and then elastic polyurethane ultrafine fiber High-speed shear dispersion into the water phase to prepare elastic polyurethane microfiber suspension;

4) Preparation of regenerable antibacterial protective fabric: take the elastic polyurethane microfiber suspension prepared in step 3) and evenly coat the surface of the base cloth layer, obtain an elastic transition layer after drying, and then evenly coat the elastic transition layer along the surface of the elastic transition layer Cover the superfine fiber suspension prepared in the step 2), dry to obtain a composite protective layer, and then chloraminate the composite protective layer with sodium hypochlorite solution at room temperature to prepare a regenerable antibacterial protective fabric.

The regenerable antibacterial protective fabric prepared by the present invention is shown in Figure 1. The protective fabric includes a base fabric layer 1, which is a cotton fabric base fabric layer, and the top of the base fabric layer 1 is sequentially provided with elastic A transition layer 2 and a composite protective layer 3, the composite protective layer 3 is an ultrafine fiber composite protective layer composited with modified polyolefin elastomer and polyurethane elastomer, and the thickness of the ultrafine fiber composite protective layer is 20-40 μm; The elastic transition layer 2 is an elastic polyurethane ultrafine fiber layer, and the thickness of the elastic polyurethane ultrafine fiber layer is 5-8 μm.

In order to better explain the present invention, the main content of the present invention is further clarified below in conjunction with specific examples, but the content of the present invention is not limited to the following examples.

Table 1 obtained by controlling each material composition ratio in the composite protective layer in each embodiment, the thickness of the composite protective layer and the fiber diameter is as follows:

Table 1 The list of components in the composite protective layer of various embodiments of the present invention

The above-mentioned composite protective layer was subjected to antibacterial test and bacterial barrier test, and Table 2 was obtained;

Table 2 The bacteriostasis rate and the bacterial barrier rate of the composite protective layer of each embodiment of the present invention

Example Bacteriostatic rate (%) Bacterial barrier rate (%) 1 99.5 95.0 2 99.5 95.0 3 99.6 95.0 4 99.8 95.0 5 99.9 95.0 6 99.9 95.0 7 99.9 99.0 8 99.9 99.2 9 99.9 99.9 10 99.9 50 11 99.9 30 12 99.9 15 13 99.9 94 14 99.9 99.5 15 99.9 99.3 16 99.9 53 17 99.9 47

After repeated ten times, the antibacterial rate of the composite antibacterial layer is still above 99%. Therefore, the protective fabric prepared by the present invention has better regenerative antibacterial property.

Claims (5)

1. a kind of revivable Antibacterial protection fabric, including base cloth layer, it is characterised in that: be successively arranged above the base cloth layer Elasticity transition layer and composite armor, the composite armor are that modified polyolefine elastomer and polyurethane elastomer are combined Superfine fibre, the modified polyolefine elastomer be by polyolefin elastomer through N- (3- dimethylamino-propyl) methacryl Amine graft modification and the product composition that preparation is handled through chloramination；The modified polyolefine elastomer and elastic polyurethane bluk recombination Made of superfine fibre fibre diameter be 700~1000nm；

The composite armor with a thickness of 20~40 μm, in the composite armor, modified polyolefine elastomer and polyurethane The mass parts ratio of elastomer is 30:70~50:50；

The elasticity transition layer is to be made of polyurethane elastomer.

2. revivable Antibacterial protection fabric according to claim 1, it is characterised in that: the elasticity transition layer with a thickness of 5~8 μm.

3. a kind of preparation method of revivable Antibacterial protection fabric as described in claim 1, it is characterised in that: it includes as follows Step:

1) it prepares modified polyolefine elastomer master batch: taking the polyolefin elastomer master batch and N- (3- bis- that mass ratio is 5~8:100 Methylaminopropyl) Methacrylamide blending, it is squeezed out after remelted and modified polyolefine elastomer master batch is prepared；

2) it prepares superfine fibre suspension: taking the modified polyolefine elastomer master batch and gather that mass parts ratio is 30:70~50:50 The mixing of urethane elastomer master batch, then be blended with acetylbutyrylcellulose, it is prepared by melting coextrusion phase separation method ultra-fine Fiber, then superfine fibre is distributed in water phase through high speed shear, superfine fibre suspension is prepared；

3) it prepares elastic polyurethane superfine fibre suspension: polyurethane elastomer master batch being taken to be blended with acetylbutyrylcellulose, lead to It crosses melting coextrusion phase separation method and elastic polyurethane superfine fibre is prepared, then elastic polyurethane superfine fibre is cut at a high speed Cutting, which is scattered in water phase, is prepared elastic polyurethane superfine fibre suspension；

4) preparation can demutation Antibacterial protection fabric: the elastic polyurethane superfine fibre uniform suspension of the step 3) preparation being taken to apply The surface of base cloth layer is overlayed on, obtains the elasticity transition layer with a thickness of 5~8 μm after dry, then uniform along the surface of elasticity transition layer The superfine fibre suspension for coating the step 2) preparation obtains the composite armor with a thickness of 20~40 μm after dry, then will Through liquor natrii hypochloritis, chloramination is handled composite armor at normal temperature, and being prepared can demutation Antibacterial protection fabric.

4. the preparation method of revivable Antibacterial protection fabric according to claim 3, it is characterised in that: the step 4) In, composite armor is immersed in the liquor natrii hypochloritis that mass concentration is 8~12%, room temperature handles 15~20min, takes out Dry be prepared can demutation Antibacterial protection fabric.

5. the preparation method of revivable Antibacterial protection fabric according to claim 3, it is characterised in that: the step 2) In, the fibre diameter for the superfine fibre that modified polyolefine elastomer and polyurethane elastomer are combined is 700~1000nm.