GB2404148A

GB2404148A - Method of producing an anti-microbial article suitable for treating skin diseases

Info

Publication number: GB2404148A
Application number: GB0317453A
Authority: GB
Inventors: Montagner Dino
Original assignee: AL PRE TEC Srl ALLERGY PREVENT
Current assignee: AL PRE TEC Srl ALLERGY PREVENT
Priority date: 2002-01-25
Filing date: 2003-07-25
Publication date: 2005-01-26
Anticipated expiration: 2023-07-25
Also published as: GB0317453D0; DE10300433B4; US20050081304A1; ITTV20020008A1; GB2404148B; FR2857876B1; DE10300433A1; NL1022180C2; FR2857876A1

Abstract

Method of producing a manufactured article, particularly in silk, indicated in the treatment of skin diseases of the human body, in which the following stages are envisaged: <SL> <LI>a. making the manufactured article, carrying out manufacture with raw, untreated and degummed silk; <LI>b. immersing the manufactured article thus obtained in a bath comprising a composition based on quaternary ammonium, combined with a catalyst that polymerizes on the fibres; <LI>c. drying; </SL> and in which the manufactured article consists of an article of clothing particularly suitable for children, in the form of a therapeutic romper suit or overalls, in knitted silk. The article may also be a sheath, a plaster, a bandage or undergarments.

Description

2404 1 48

METHOD OF PRODUCING A MANUFACTURED ARTICLE IN

SILK INDICATED IN THE TREATMENT OF SOME SKIN

DISEASES OF THE HUMAN BODY

The present invention relates to a method for producing a manufactured article in silk indicated in the treatment of some skin diseases of the human body.

The proposed invention finds particular but not exclusive application in the area of specialist products for use in the health sector intended for complementing drug therapy for the treatment of atopic dermatitis.

FIELD OF APPLICATION

Skin diseases, a classic example of which is dermatitis, are well known.

In subjects who unfortunately suffer from them, they cause skin irritation which can sometimes be localized, while in many circumstances it may be diffused, affecting almost the whole body. *.

:.. 20 A. . It is certainly a considerable problem, since obviously the part affected À. . by the pathology, as well as usually being treated with suitable drugs, must also be protected as well as possible. Protection is thus an essential aspect, not only for promoting regeneration of the skin, but especially to À. - À. ..: 25 prevent the phenomenon being aggravated or, worse, being repeated. It * * can in fact happen that through inadequate protection, bacterial colonies develop, giving rise to repeated troublesome and dangerous infections that slow the course of the disease. It must not be forgotten, moreover, that skin infections are among the most recurrent pathologies as a consequence of severe dermatitis.

The same may be said of other pathologies, for example diabetic foot, or even more so in the case of the treatment of burns. Ultimately, in these and other circumstances, always with the same protective aim, it is necessary to proceed by wearing or fitting special articles of clothing, bandages or even just sheaths.

For example, the problem is tackled in DE4101580 (Faeth), suggesting for some pathologies the making of an article of clothing for night wear, which comprises a so-called overall, which is completely closed with respect to the ends of the sleeves and legs. The overall is in this case made from a cotton textile which is compatible with the skin.

In any case, in addition to articles of clothing, elastic bandages for medication are also known, which are currently made of commercially available fabrics. Both the concepts of stretch fabric or extensible fibre and elastic article of clothing are not novel in themselves and so are available in many different types. Fabrics that absorb moisture are also known and are not novel. Many of these manufactured articles are made, for example, from material of elastic synthetic fibre, like Lycra' (a : . À 20 registered trademark of DuPont de Nemours & Co. ), and are À..

characterized by elongation of the elastomer of at least 500-600%. For making articles of clothing, this material is never used on its own, but is Àe always combined with other fibres, for example polyesters, cotton, nylon, À -.

and others that are commercially available. Various methods are used for À.. 25 making the fabric, depending on the different compositions, and tricot, for example, is quite widely used for knitted goods.

US6063049 (Watkins) proposes protective clothing, particularly for postoperative use, obtained from two layers of woven material, each one obtained by combining a polyester fibre with a second fibre of an elastic type. The fabric has an elasticity of approx. 200-220 + 10% in the two directions of the weft and warp, with a tolerance relative to the latter between 3% and 5%. This fabric is further characterized by a modular compression from approx. 1 to approx. 4, with good capacity for transpiration, which leads to loss of a percentage humidity close to 70100%, in 30 min. These and other solutions not yet described are certainly valuable, though a significant fact is that the aforementioned articles are only intended to protect the skin against contact, but not also achieve antimicrobial objectives.

STATE OF THE ART RELATIVE TO THE INVENTION

The properties of silk are known from the literature. An excellent fibre, it has always been used for making traditional articles of clothing, from shirts to stockings, and other accessories as well.

It is also known that some subjects have the aim of imparting antimicrobial objectives to a fabric, particularly for the treatment of some skin diseases. e.e

:.. 20 À e This is so in the case of CN1044964 (Wang), which tackles the problem A. of the transmission of dermatitis through contact with fabrics. In more À detail, it is proposed to make a nonwoven fabric, which uses acrylic À:.

fibres modified by a chemical treatment, stretched to give a uniform, À. ..' 25 antiseptic and anti-odour fibre combined with a polyester or viscose fibre À .e À . and polypropylene fibre, subsequently structured as a network and then treated with acrylate latex. This fabric would, according to the drafter, lend itself to the manufacture in particular of hygienic absorbents, with anti-inflammatory and anti-pruritus properties, and with functions of health protection, e.g. protection against softening of the skin, dermatitis and other skin disorders.

The applicant has also obtained brief information regarding application CN1211652 (Yutang). It is known that this deals with a fabric for preventing allergic asthma caused by dust from mites. In essence it appears that the fabric is treated with an emulsion consisting of acaricide, adhesive and filling water. This fabric seems to be indicated in particular for making mattress stuffing and bedspreads, as well as for treating allergic rhinitis, allergic dermatitis and conjunctivitis, caused by mites.

DRAWBACKS

Although the proposed solutions meet their individual objectives, they are generally considered to be insufficient, as they are unable to offer a material, in particular a fabric, with good therapeutic and antiseptic properties.

From the structural standpoint, the fibres or the material thus obtained are not flexible and cannot be cleaned properly, as a fabric should that is used for making clothing that is especially comfortable and at the same time has high capacity for ensuring hygienic conditions. À .

À .. 20 act.

With regard to the finished articles of clothing, especially with reference to the solution proposed by DE4101580 (Faeth), in addition to the circumstances mentioned above, the fact that they are made of cotton À.e does not prevent irritation of the skin, because the short cotton fibres À.

À, À, 25 absorb and give up moisture, elongating and contracting continually, causing a constant rubbing action on the skin, thus contributing to further irritation of the skin that is already affected by other troubles. Its hydroscopic capacity is therefore limited, producing a sensation of dampness for long periods.

Accordingly, there is clearly a need to find alternative solutions with greater functionality than those currently available or deducible.

The aim of the present invention is therefore to offer an optimum solution of technical fabric for making articles of clothing, intended for the health care sector, for therapeutic and antiseptic purposes.

SUMMARY OF THE INVENTION

This and other aims are achieved with the present innovation according to the characteristics as in the appended claims, solving the problems described by means of a method for obtaining a manufactured article, particularly in silk, indicated for the treatment of skin diseases of the human body, in which the following stages are envisaged: a. making the manufactured article, carrying out manufacture with raw, untreated and degummed silk; b. immersing the manufactured article thus obtained in a bath comprising a composition based on quaternary ammonium, combined with a catalyst that polymerizes on the fibres; 86<. C. drying; 8 8.. À

d. any required colouring of the manufactured article thus obtained, which can also be carried out prior to stage (b); 1., 25 À and in which the manufactured article consists of an article of clothing particularly suitable for children, in the form of a therapeutic romper suit or overalls, in knitted silk, integrating portions of knitwear that cover the ends of the upper and lower limbs, which provides, corresponding to the aforesaid ends, openings like buttonholes for the temporary emergence of the hands and of the feet.

ADVANTAGES

Certain objectives are thus achieved, through the considerable creative contribution, whose effect constitutes an immediate technical advance.

Firstly it should be pointed out that the manufactured article thus produced has the benefit of a substrate, namely silk, whose exceptional qualities are known. More particularly, it is non-allergenic and non irritant, it allows transpiration, it has a thermoregulating function so that it reduces sweating, there are no electrostatic charges, it does not emit odours, it does not support mildew and moths, it is non-felting, it does not shrink, it is strong and flexible and, finally, it can be washed with neutral shampoo. There are no known applications intended as it were for therapeutic use. For example, in the solutions mentioned earlier, the fibres used in the manufacture of an article of clothing are either of a synthetic type or of a natural type, but in the latter case only cotton is used, see for example the observations with reference to the proposal in DE4101580 (Faeth). Among the more significant characteristics, relating to the silk substrate only, there is the fact that the article of clothing . . .

20 made of knitted silk possesses considerable hydroscopic capacity, because À...DTD: when the extremely long, degummed silk threads absorb and give up moisture they do so by increasing and decreasing their diameter, without causing irritation of the sensitive skin. As well as maintaining the water : balance of the skin, this phenomenon also exerts other positive effects on À, À. 25 the epidermis, a particular benefit being that it produces micromassaging that causes local activation of the cells, further promoting their regeneration.

Since the silk has also been treated with an antimicrobial product, the manufactured article thus obtained also offers other benefits. In more detail, as well as constituting an excellent barrier to skin irritation and excoriation by providing active protection of the damaged horny layer, it controls the development of bacteria (especially Staphylococcus aureus) and greatly reduces the possibility of infection. Overall, therefore, it can be stated that the present manufactured article is particularly indicated, as well as for treating and curing dermatitis, in the treatment of burns by aiding regeneration of the skin, in female personal care for treatment of candidiasis, and in the treatment of cutaneous manifestations of diabetes, such as diabetic foot.

Furthermore, its function is permanent, in contrast to the other solutions, which have a function of limited duration.

As for the specific advantages of rompers in knitted silk treated by the method described above, it can be seen that, owing to the individual openings provided corresponding to the extremities, they permit the hands and/or the feet to come out, with obvious benefits for the subject being treated and for his carers. Yet another advantage is that the rompers are made with all the seams on the outside, which offers the benefit of a significant reduction of the effect of friction on the skin.

To summarize, a manufactured article can be produced that is provided with good technological content, combining as many functions as possible. :

These and other advantages will become clear from the following detailed À. 25 description of at least one preferred embodiment with the aid of the appended schematic drawings, the details of execution of which are not intended to be limiting, but are only given by way of an example.

BRIEF DESCRIPTION OF THE DRAWINGS

Figure 1 is a front view of a manufactured article in silk, treated according to the present invention with an antimicrobial agent, in particular a romper suit for babies.

Figure 2 is a back view of the romper suit for babies as in Fig. 1.

Figure 3 is, finally, a block diagram of a method of manufacture for producing a manufactured article, treated with an antimicrobial agent.

PRACTICAL DESCRIPTION OF AN APPLICATION

The present invention relates to a method for producing a manufactured article in silk indicated in the treatment of skin diseases of the human body, and an article of clothing in silk thus obtained, treated with an antimicrobial agent.

In this particular case, the successive stages for carrying out the aforementioned method require, firstly, the availability of fibres of raw, and hence untreated, natural silk. This presumes, essentially, that the . fibre is degummed, in an operation that provides removal of the gum. .

Stage (a).

À.: 25 The article of clothing (1), for example, is obtained using the said fibres aces of raw silk, which can if necessary be coated with a lubricant, for

example oil.

Stage (b).

A liquid bath is provided, at a temperature of approx. 25 C, to which an antimicrobial solution has been added. The said solution is composed of an antimicrobial agent based on quaternary ammonium, and more specifically of the type identified in the product AEGIS Dow Corning 5700 (3-trimethoxysilylpropyldimethyloctadecyl ammonium chloride) marketed by AEGIS Environmental Management, Inc., previously dissolved in a percentage of water with the addition of SILANE (from the family of silicone softeners) as binder. The percentage of the AEGIS antimicrobial agent in the solution is approx. 8% per 1 kilogram of dry fabric or article to be treated. As a rule, therefore, 30-35 kg of solution is required per 1 kg of fabric to be treated. The article of clothing (1), once immersed, is kept in motion, and the liquid environment in which it is immersed with a pH of 5 is raised first to a temperature of 30g and then to 50 C with pH 8, for a total time of 45-60 minutes.

Stage (c) Next the fabric or the article (l) thus treated is submitted to drying, in a cycle of centrifugation.

Stage (d) À.. 20 : ..

The final stage is colouring, which in one case can also be carried out before stage (b). .. a..

Significantly, excellent results have also been obtained using raw À.. 25 materials other than silk, such as nonwoven fabric, synthetic or acrylic fibres, and even polypropylene.

Some tests were also carried out with the aim of verifying the effectiveness of the treatment on the fibre submitted to the process described above. For example, test report No. 010327/1 dated 27.07.2001 issued by the Experimental Station, analysis service of the Milan Polytechnic, is interesting. This was carried out using test method AATCC 147-1998: microorganisms: Staphylococcus aureus ATCC 6538 inoculum: parallel stripes are made of a liquid culture of S. aureus on whole agar contact time and temperature: 24h at 37 C quantity of sample tested: testpieces of fabric with the dimensions 3 cm x cm sterilization of the sample: none

RESULTS

INHIBITION GROWTH GROWTH ON

HALO UNDER THE THE FABRIC

TESTPIECE (**) TREATED ABSENT (*) ABSENT ABSENT

SAMPLE

UNTREATED ABSENT (*) PRESENT PRESENT

SAMPLE

À (*): continuous growth of bacteria around the testpiece of fabric I...

À . (**): on the testpiece side in contact with the agar I 15 After 24 h of incubation of the plates, formation of a halo of growth inhibition was not observed, indicating that antimicrobial product is not À: released into the agar from the treated sample. À. À À Àe À...

I A possible application of the treated fabric, as has been mentioned, is for making an article of clothing (1), in this particular case a romper suit made of knitted silk for babies, suitable in particular for the treatment of atopic dermatitis. This is an article of clothing that covers the human body almost completely, apart from the neck and the head. It consists of a central part, the body (10), and four appendages, namely two (11) to form the sleeves, made diametrically opposite at shoulder height, and two 11 1 (12) almost parallel, involving the lower part of the central body (10), for I covering the subject's legs. All four appendages have an end portion (110, 120), closed like a mitten or like a sock, as appropriate, which being an integral part of the sleeve (11) or of the leg (12), completely covers the limb in question, i.e. the hand or the foot. The main characteristic of the said article of clothing (1) is that it provides openings (13), each made in a reversed position, relative to the end of the appendages (11, 12). The said openings (13), made like a buttonhole, make it possible for the child's carer to bring the child's hands or feet out through the openings, even if only temporarily, so as to allow a certain freedom of movement, but without interrupting the treatment.

Another important point is that, as a consequence of the finishing process of the article of clothing (1), all the seams (14) are on the outside of the romper suit (1), so as to provide a substantially smooth and even internal surface, without any irritating surfaces. Finally, with regard to the wearability of the article of clothing, at the back it is provided with two intersecting openings made along the vertical axis and the horizontal axis, the overlapping flaps of which are closed using ordinary fastening means.

À,. 20 À.. À.

À À À I À a À:e À À À

Claims

1. A method of producing a manufactured article, indicated in the treatment of skin diseases of the human body, characterized in that it comprises the following stages: a. making the manufactured article (1), in the form of fabric as a piece or reel, or article of clothing or portion of an article of clothing already made; b. immersing the manufactured article (1) thus obtained in a bath containing an antimicrobial agent, which comprises a solution based on quaternary ammonium, combined with a catalyst that polymerizes on the fibres; c. drying; d. any required colouring of the manufactured article thus obtained (1).

2. A method of producing a manufactured article according to claim 1, characterized in that stage (d) of colouring of the manufactured article thus obtained (1) is carried out before stage (b).

À.. 20 . ,.

.

3. A method of producing a manufactured article according to claims . 1 and 2, characterized in that processing of untreated, degummed raw À a. silk is required in stage (a) for making the manufactured article (1).

À.. 25

4. A method of producing a manufactured article according to the preceding claims, characterized in that the raw silk is cleaned to remove oil.

5. A method of producing a manufactured article according to the preceding claims, characterized in that in stage (b) the antimicrobial agent used in the solution is of the type AEGIS Dow Corning 5700 (3 trimethoxysilylpropyldimethyloctadecyl ammonium chloride).

6. A method of producing a manufactured article according to the preceding claims, characterized in that the addition of a product from the family of silicone softeners as binder to the antimicrobial agent and to the water present in the solution is envisaged in stage (b).

7. A method of producing a manufactured article according to the preceding claims, characterized in that in stage (b), the percentage of the AEGIS antimicrobial agent in the solution is approx. Ho per 1 kilogram of dry fabric or article of clothing to be treated, and moreover in which the manufactured article (1), once immersed, is kept in motion, and the liquid environment in which it is immersed at pH 5 is raised firstly to a temperature of 30g until it reaches 50 C at pH 8, for a total time of 45minutes.

8. A manufactured article in knitted silk according to the preceding claims, characterized in that it is a romper suit of the overall type, made of knitted silk, which covers the human body, leaving the neck and the head uncovered, and is made up of a central part, the body (10), and four Àe À 20 appendages, namely two (11) for forming the sleeves, made diametrically À. opposite at shoulder height, and two (12) almost parallel, involving the À . lower part of the central body (10), for covering the subject's legs, and À moreover in which the four appendages have an end portion (110, 120) , closed like mittens or socks, providing openings (13), each made in a À.: 25 back position relative to the ends of the appendages (11, 12).

I

9. A manufactured article in knitted silk according to the preceding claims, characterized in that the romper suit (1) has the seams (14) on the outside of the romper suit (1).

10. A manufactured article according to claims 1 to 6, characterized in that it is a semifinished fabric.

11. A manufactured article according to claims 1 to 6, characterized in that it is a sheath.

12. A manufactured article according to claims 1 to 6, characterized in that it is part of a sticking plaster interacting with an adhesive backing.

13. A manufactured article according to claims 1 to 6, characterized in that it is a bandage.

14. A manufactured article according to claims 1 to 6, characterized in that it is a finished article of clothing, such as an undergarment.

15. A manufactured article according to claims 1, 2 and 5, characterized in that the manufactured article (1) is of the type made of non-woven fabric, or of synthetic or acrylic fibres, or of polypropylene.

16. A method of producing a manufactured article substantially as described herein and with reference to the drawings.

À e 20

17. A manufactured article substantially as described herein and with reference to the drawings. À : À