CZ34674U1 - Textile composite with antibacterial effect and hygienic absorbent device containing this composite - Google Patents

Description

Textile composite with antibacterial effect and hygienic absorbent device containing this composite

Field of technology

The technical solution concerns a textile composite with an antibacterial effect.

The technical solution also relates to a hygienic absorbent device, in particular a diaper for children or adults, which contains this composite.

Prior art

An irritative dermatitis, also known as diaper dermatitis, is an undesirable side effect of long-term use of existing hygienic absorbent devices, such as baby diapers or adult incontinence devices. It is mainly caused by skin contact with urine or stool in combination with a local increase in skin temperature and sweating in an environment closed by an airtight diaper. In this way, moisturized and dirty skin is more susceptible to damage by mechanical friction and abrasion. The environment of the diaper, resp. At the same time, it promotes the growth of certain microorganisms contained in the human digestive tract, urine or stool, which can cause secondary bacterial or yeast infection of the disrupted skin.

At present, there is no suitable material that would provide hygienic absorbent devices with sufficient antibacterial properties, while not preventing the movement of liquid into their absorbent layer, and which could be used as part of them reducing the risk of irritant dermatitis or other dermatological defects and skin problems. , and their complications by bacterial or yeast infections.

The aim of the technical solution is to design such a material.

In addition, the aim of the technical solution is also to design a hygienic absorbent device which contains this material.

The essence of the technical solution

The aim of the technical solution is achieved by a textile composite with antibacterial effect, the essence of which consists in that it contains a supporting textile layer with a basis weight of 10 to 40 g / m ² , on which a layer of nanofibres of hydrophilic polymer with a basis weight of 0.1 to 10 g / m ² , in the nanofibers of which at least one substance with antibacterial effect is incorporated in an amount of 0.5 to 30% by weight of this layer. The carrier textile layer provides this composite with the necessary mechanical properties, while the nanofiber layer provides antibacterial properties.

In a preferred embodiment variant, the carrier textile layer has a basis weight of 12 to 30 g / m ² .

The most suitable material of the carrier layer is in particular a polypropylene or polyethylene-propylene nonwoven fabric of the spunbond type.

In a preferred embodiment variant, the nanofiber layer has a basis weight of 0.1 to 2 g / m ² .

The most suitable material for the nanofiber layer is polyamide 6 (PA6), polyvinyl butyral (PVB) or polyvinylidene fluoride (PVDF).

- 1 CZ 34674 UI

In a preferred variant of the embodiment, the at least one substance with an antibacterial effect is incorporated in the nanofibers of the nanofiber layer in an amount of 1 to 27% by weight.

Suitable substances with antibacterial action are, for example, dodecyltrimethylammonium bromide (DTAB) or chlorhexidine (CHX). In the case of dodecyltrimethylammonium bromide, its optimal amount in the nanofibers of the nanofiber layer is 8 to 27% by weight, in the case of chlorhexidine 1 to 12% by weight.

In addition, the object of the technical solution is also achieved by a hygienic absorbent device comprising an outer textile layer, an absorbent layer and an inner textile layer intended for contact with the user's skin, the essence of which is that the inner textile layer is formed by a textile composite according to the technical solution. it is arranged with its supporting textile layer towards the outside of the structure of this device and with its layer of nanofibers towards the absorbent layer.

Explanation of drawings

In the accompanying drawings, Fig. 1a is a photograph of a Petri dish with a culture of Staphylococcus aureus inhibited by a textile composite according to the technical solution in one variant embodiment, Fig. 1b is a photograph of a Petri dish with a culture of Staphylococcus aureus. Fig. 2 is a photograph of a Petri dish with a culture of Staphylococcus aureus inhibited by a textile composite according to the technical solution in a second variant embodiment. Fig. 3a is a photograph of a Petri dish with a culture of Staphylococcus aureus inhibited by a textile composite according to the technical solution in a third variant embodiment, Fig. 3b is a photograph of a Petri dish with a culture of Staphylococcus aureus. Fig. 4a is a photograph of a Petri dish with a culture of Klebsiella pneumoniae inhibited by the same textile composite according to the technical solution as in Fig. 3a, and Fig. 4b is a photograph of a Petri dish with a culture of Klebsiella pneumoniae.

Examples of technical solution

The textile composite with antibacterial effect according to the technical solution comprises a carrier textile layer of any type, on which a layer of polymeric nanofibres is deposited, in the nanofibers of which at least one substance with antibacterial effect is incorporated.

The carrier textile layer is preferably formed in particular of a polypropylene or polyethylene-propylene spunbond nonwoven fabric with a basis weight of 10 to 40 g / m ² , preferably 12 to 30 g / m ² .

The polymer nanofiber layer is preferably formed of hydrophilic polymer nanofibers with good stability in liquids, such as polyamide 6 (PA6), ibutyral poly (PVB), polyvinylidene fluoride (PVDF), etc. Its basis weight is 0.1 to 10 g / m ² , preferably 0.1 to 2 g / m ² . This layer contains at least one substance with an antibacterial effect in its nanofibers. When using a textile composite as part of a hygienic absorbent device, such as a diaper, suitable substances with antibacterial effect are in particular substances which inhibit bacteria found in the human digestive tract or urine or stool, i.e. in particular Enterococcus faecis, Bacteroides fragilis, Escherichia coli . Such substances include, for example, dodecyltrimethylammonium bromide (DTAB) or chlorhexidine (CHX), etc. Depending on the particular antibacterial substance used, its content in the layer of polymeric nanofibers is 0.5 to 30% by weight. In the case of dodecyltrimethylammonium bromide, the preferred amount is 8 to 27% by weight, in the case of chlorhexidine 1 to 12% by weight. - at lower concentrations the layer of nanofibers does not act as a whole with antibacterial properties, at higher concentrations its antibacterial properties no longer improve, but the mechanical properties of nanofibers deteriorate and their price increases.

-2 CZ 34674 UI

Textile composite with antibacterial effect according to the technical solution has many uses. One of them is, for example, its storage in the structure of existing hygienic absorbent devices, such as devices intended for the solution of incontinence - diapers. In their structure, this composite is deposited as the uppermost layer with the layer of nano-fibers oriented inwards - i.e., as the contact layer with the user's skin, the supporting textile layer of this composite serves. Due to its structure and hydrophilic properties, it does not prevent the drainage of liquid into the absorbent layers of the diaper, but at the same time provides the diaper with antibacterial properties, thus preventing dermatological defects and other skin problems associated with long-term use of these absorbent devices.

A typical structure of a hygienic absorbent device according to the technical solution thus comprises an outer textile layer consisting of e.g. polypropylene or polyester nonwoven fabric, an absorbent layer consisting of e.g. a pulp layer containing a so-called superabsorbent such as sodium polyacrylate and an inner textile layer intended for contact with the user's skin. The inner textile layer is formed by the textile composite described above, which is arranged with its supporting textile layer outwards from the structure of the absorbent device, i.e. towards the wearer's skin, and with its layer of nanofibers towards the absorbent layer of the absorbent device. If necessary, this structure can contain additional textile layers.

In the production of a layer of polymeric nanofibers, the substance (s) with antibacterial activity are dissolved in the same solvent as the polymer, and in electrospinning they are entrained in the streams of this solution, from which the individual nanofibers are subsequently formed. As a result, this substance (s) with an antibacterial effect form part (s) of the cross-section and / or lengths of the individual nanofibers.

A suitable solution for preparing the nanofiber layer contains 10 to 14% by weight of polymer and 0.1 to 4% by weight. substances / substances with antibacterial effect.

If the layer of nanofibers is deposited directly on the fabric representing the carrier layer of the future composite during its production by electrospinning, it obtains sufficient adhesion to it for the intended use only by depositing a number of nanofibers on this fabric in a not completely solidified state and dries and solidifies only on it. . However, if necessary, it is possible to join the two layers of the composite over the entire surface or over at least part of their circumference by any of the known technologies, e.g. ultrasonic welding, spot bonding with a hot melt binder, e.g. based on polyurethane (PU), etc.

Example 1

A solution containing polyamide 6 (PA6) in an amount of 10% by weight and dodecyltrimethylammonium bromide (DTAB) in an amount of 0.5% by weight dissolved in technical alcohol was spun by electrostatic spinning using direct voltage. The formed nanofibers were deposited on a polypropylene spunbond nonwoven fabric having a basis weight of 20 g / m ² , and a layer having a basis weight of 2 g / m ^{2 was} formed thereon. Dodecyltrimethylammonium bromide in an amount of 4.8% by weight was incorporated in the nanofibers of this layer.

The textile composite thus formed was placed in a petri dish with a nutrient medium in which a model culture of Staphylococcus aureus was inoculated in strips. A textile composite of the same structure, but without dodecyltrimethylammonium bromide, was placed in a second petri dish with the same nutrient medium and the same culture. In the first case, a culture of Staphylococcus aureus was rapidly inhibited, not only where the culture was in direct contact with a textile composite containing dodecyltrimethylammonium bromide, but also in the immediate vicinity of this composite - see Fig. 1a; in the second case, the textile composite had no effect on the culture of Staphylococcus aureus - see Fig. 1b.

-3CZ 34674 UI

Example 2

A solution containing polyvinyl butyral (PVB) in an amount of 10% by weight and dodecyltrimethylammonium 5 bromide (DTAB) in an amount of 2% by weight dissolved in technical alcohol was spun by electrostatic spinning using direct voltage. The formed nanofibers were deposited on a polypropylene spunbond nonwoven fabric having a basis weight of 20 g / m ² , and a layer having a basis weight of 2 g / m ^{2 was} formed thereon. Dodecyltrimethylammonium bromide in an amount of 16.7% by weight was incorporated in the nanofibers of this layer.

Due to the higher concentration of dodecyltrimethylammonium bromide, Staphylococcus aureus was inhibited more rapidly than in Example 1, with approximately the same overlap outside the composite sample.

Example 3

A solution containing polyamide 6 (PA 6) in an amount of 12% by weight and dodecyltrimethylammonium bromide (DTAB) in an amount of 2.5% by weight dissolved in a solvent system consisting of acetic acid and formic acid in the electrostatic spinning using direct voltage was spun. weight ratio 2: 1. The formed nanofibers were deposited on a polypropylene spunbond nonwoven fabric having a basis weight of 26 g / m ² , and formed a layer thereon with a basis weight of 3 g / m ² . Dodecyltrimethylammonium bromide in an amount of 17.2% by weight was incorporated in the nanofibers of this layer.

Due to the higher concentration of dodecyltrimethylammonium bromide, Staphylococcus aureus was inhibited more rapidly than in Example 1, with approximately the same overlap outside the composite sample.

Example 4

A solution containing polyvinyl butyral (PVB) in an amount of 10% by weight and dodecyltrimethylammonium 30 bromide (DTAB) in an amount of 4% by weight dissolved in technical alcohol was spun by electrostatic spinning using direct voltage. The formed nanofibers were deposited on a spunbond polyethylene-propylene nonwoven fabric having a basis weight of 32 g / m ² , and a layer having a basis weight of 2 g / m ^{2 was} formed thereon. Dodecyltrimethylammonium bromide in an amount of 28.6% by weight was incorporated in the nanofibers of this layer.

Due to the higher concentration of dodecyltrimethylammonium bromide, Staphylococcus aureus was inhibited more rapidly than in Example 1, with approximately the same overlap outside the composite sample.

Example 5

Electrostatic spinning using direct current voltage spun a solution containing polyamide 6 (PA 6) in an amount of 14% by weight and dodecyltrimethylammonium bromide (DTAB) in an amount of 0.5% by weight, dissolved in a solvent system consisting of acetic acid and formic acid in weight ratio 2: 1. The formed nanofibers were deposited on a polypropylene nonwoven fabric of the spunbond type with a basis weight of 20 g / m ² , and formed a layer with an basis weight of 8 g / m ² thereon. Dodecyltrimethylammonium bromide in an amount of 3.5% by weight was incorporated in the nanofibers of this layer.

Due to the lower concentration of dodecyltrimethylammonium bromide, Staphylococcus aureus was inhibited more slowly than in Example 1, essentially without overlapping the composite sample. Nevertheless, the inhibition is sufficient for the intended practical use.

Example 6

A solution containing 10% by weight of polyamide 6 (PA 6) and dodecyltrimethylammonium bromide was spun by electrostatic spinning using direct current.

-4GB 34674 UI (DTAB) in an amount of 3% by weight, dissolved in a solvent system consisting of acetic acid and formic acid in a weight ratio of 2: 1. The formed nanofibers were deposited on a polypropylene spunbond nonwoven fabric having a basis weight of 20 g / m ² , and a layer having a basis weight of 2 g / m ^{2 was} formed thereon. Dodecyltrimethylammonium bromide in an amount of 23.1% by weight was incorporated in the nanofibers of this layer.

The textile composite thus formed is placed in a petri dish with a nutrient medium in which a model culture of Staphylococcus aureus has been inoculated in strips. The culture of Staphylococcus aureus was inhibited very rapidly, not only where this culture was in direct contact with the textile composite containing dodecyltrimethylammonium bromide, but also in the immediate vicinity of this composite - see Fig. 2.

Example 7

A solution containing 12% by weight of polyvinyl butyral (PVB) and 0.1% by weight of chlorhexidine (CHX) dissolved in technical alcohol was spun by direct current electrostatic spinning. The formed nanofibers were deposited on a polypropylene spunbond nonwoven fabric having a basis weight of 10 g / m ² , and a layer having a basis weight of 0.5 g / m ^{2 was} formed thereon. Chlorhexidine was incorporated in the nanofibers of this layer in an amount of 0.83% by weight.

Even at this concentration of chlorhexidine, Staphylococcus aureus was inhibited sufficient for the intended practical use.

Example 8

A solution containing polyamide 6 (PA 6) in an amount of 12% by weight and chlorhexidine (CHX) in an amount of 0.7% by weight dissolved in a solvent system consisting of acetic acid and formic acid by weight was spun by electrostatic spinning using direct voltage. 2: 1 ratio. The formed nanofibers were deposited on a polypropylene spunbond nonwoven fabric having a basis weight of 20 g / m ² , and a layer having a basis weight of 3 g / m ^{2 was} formed thereon. Chlorhexidine was incorporated in the nanofibers of this layer in an amount of 5.5% by weight.

Due to the higher concentration of chlorhexidine, Staphylococcus aureus was inhibited more rapidly than in Example 7, with an overlap outside the composite sample.

Example 9

A solution containing polyvinyl butyral (PVB) in an amount of 10% by weight and chlorhexidine (CHX) in an amount of 1.2% by weight, dissolved in technical alcohol, was spun by electrostatic spinning using direct voltage. The formed nanofibers were deposited on a polypropylene nonwoven fabric of the spunbond type with a basis weight of 20 g / m ² , and formed a layer therewith with a basis weight of 1 g / m ² . Chlorhexidine was incorporated in the nanofibers of this layer in an amount of 10.7% by weight.

Due to the higher concentration of chlorhexidine, Staphylococcus aureus was inhibited significantly faster than in Example 8, with an overlap outside the composite sample.

Example 10

A solution containing polyamide 6 (PA 6) in an amount of 14% by weight and chlorhexidine (CHX) in an amount of 0.5% by weight dissolved in a solvent system consisting of acetic acid and formic acid by weight was spun by electrostatic spinning using direct voltage. 2: 1 ratio. The formed nanofibers were deposited on polyethylene

-5CZ 34674 UI propylene nonwoven fabric of the spunbond type with a basis weight of 40 g / m ² , and formed a layer thereon with a basis weight of 10 g / m ² . Chlorhexidine was incorporated in the nanofibers of this layer in an amount of 3.5% by weight.

Due to the lower concentration of chlorhexidine, Staphylococcus aureus was inhibited more slowly than in Example 9, with less overlap outside the composite sample.

Example 11

A solution containing 12% by weight of polyvinylidene fluoride (PVDF) and 2% by weight of dodecyltrimethylammonium bromide (DTAB) dissolved in technical alcohol was spun by electrostatic spinning using direct voltage. The formed nanofibers were deposited on a polypropylene spunbond nonwoven fabric having a basis weight of 20 g / m ² , and a layer having a basis weight of 2 g / m ^{2 was} formed thereon. Dodecyltrimethylammonium bromide in an amount of 14.3% by weight was incorporated in the nanofibers of this layer.

The textile composite thus formed was placed in a petri dish with a nutrient medium in which a model culture of Staphylococcus aureus was inoculated in strips. A textile composite of the same structure, but without dodecyltrimethylammonium bromide, was placed in a second petri dish with the same nutrient medium and the same culture. In the first case, there was a rapid inhibition of the culture of Staphylococcus aureus, not only where this culture was in direct contact with the textile composite containing dodecyltrimethylammonium bromide, but also in the immediate vicinity of this composite - see Fig. 3a; in the second case, the textile composite had no effect on the culture of Staphylococcus aureus - see Fig. 3b.

Then, another sample of this textile composite was placed in a petri dish with nutrient medium in which a strip culture of Klebsiella pneumoniae was inoculated in strips. A textile composite of the same structure, but without dodecyltrimethylammonium bromide, was placed in a second petri dish with the same nutrient medium and the same culture. In the first case, there was a rapid inhibition of the culture of Klebsiella pneumoniae where this culture was in direct contact with the textile composite containing dodecyltrimethylammonium bromide - see Fig. 4a; in the second case, the textile composite had no effect on the culture of Staphylococcus aureus - see Fig. 4b.

Claims (13)

CLAIMS FOR PROTECTION A textile composite with an antibacterial effect, characterized in that it comprises a carrier textile layer with a basis weight of 10 to 40 g / m ² , on which a layer of hydrophilic polymer nanofibers with a basis weight of 0.1 to 10 g / m ² is deposited, in the nanofibers of which at least one substance with antibacterial effect is incorporated in an amount of 0.5 to 30% by weight. Textile composite according to Claim 1, characterized in that the carrier textile layer has a basis weight of 12 to 30 g / m ² . Textile composite according to Claim 1 or 2, characterized in that the carrier layer consists of a polypropylene or polyethylene-propylene nonwoven fabric of the spunbond type. The textile composite according to claim 1, characterized in that the layer of nanofibers has a basis weight of 0.1 to 2 g / m ² . Textile composite according to Claim 1 or 4, characterized in that the nanofiber layer is a polyamide 6 nanofiber layer. The textile composite according to claim 1 or 4, characterized in that the layer of nanofibers is a layer of nanofibers of Ibutyral pole. The textile composite according to claim 1 or 4, characterized in that the nanofiber layer is a layer of polyvinylidene fluoride nanofibers. The textile composite according to claim 1, characterized in that the at least one substance with an antibacterial effect is incorporated in the nanofibers of the nanofiber layer in an amount of 1 to 27% by weight. Textile composite according to Claim 1 or 8, characterized in that the substance having an antibacterial effect is dodecyltrimethylammonium bromide. The textile composite according to claim 9, characterized in that the dodecyltrimethylammonium bromide is incorporated in the nanofibers of the nanofiber layer in an amount of 8 to 27% by weight. Textile composite according to Claim 1 or 8, characterized in that the substance having an antibacterial effect is chlorhexidine. The textile composite according to claim 11, characterized in that the chlorhexidine is incorporated in the nanofibers of the nanofiber layer in an amount of 1 to 12% by weight. A sanitary absorbent device comprising an outer textile layer, an absorbent layer and an inner textile layer for contact with the user's skin, characterized in that the inner textile layer is formed by a textile composite according to any one of claims 1 to 12, which is arranged with its carrier a textile layer outwards from the structure of the absorbent device and with its layer of nanofibers towards the absorbent layer.