CZ37050U1 - A flat textile in the form of knit - Google Patents

Description

Flat textile in the form of a knit

Field of technology

The technical solution concerns an innovative flat textile in the form of a knit for the needs of people who suffer from some rare skin disease, e.g. Epidermolysis Bullosa (EB). The properties of this textile should contribute to alleviating patients' health problems and improving their quality of life.

Current state of the art

It is estimated that there are more than 500,000 EB patients worldwide and the disease occurs in all population groups, affecting men and women equally. The second large group of disorders with skin manifestations is congenital ichthyosis.

EB is one of the least serious rare skin diseases and is caused by abnormalities in the structures of the skin. Because of these abnormalities, friction on the skin causes blisters. Because blisters cause wounds that do not heal well and there is currently no medical therapy available to cure this skin condition, patients suffer constant physical and psychological pain throughout their lives. Therefore, it is important that skin protection garments with protective functions are specially developed for EB patients to improve their wearing comfort and reduce the risk of skin injury through the interaction of human skin and clothing as a “second skin”.

Sweating also has an effect on the formation of blisters. Therefore, people with EB should not dress too warmly, as sweating promotes the formation of blisters.

The primary goal in the care of patients with EB is the selection of textiles that have low friction, a very soft feel and physiological properties.

Antibacterial properties are very important to prevent infection in wounds caused by blisters.

It is clear from the above knowledge that the selection of the appropriate material and construction of the textile is primary.

According to research in professional publications, a number of companies deal with research and development of suitable clothing for patients with EB, and there is an offer of special clothing on the market.

In terms of material composition, they are mostly made of cotton, possibly with a proportion of polyester, viscose, treated genuine silk and lyocell are also mentioned.

For example, we can mention the company Lenzing Group, which is the market leader in the segment of special fibers made from renewable raw material - wood. The company provides both financial support and textiles made from its fibers to the DEBRA Austria patient organization for "butterfly children". Several patients with the skin disorder Epidermolysis Bullosa (EB) tested leggings, underwear, pyjamas, blankets and bedding made from TENCEL™ fibers, a lyocell fiber based on regenerated cellulose produced by the Lenzing Group.

Research and development of clothes for people with EB are carried out by some workplaces. E.g.

in Textile Research Journal2018, Vol. 88(6) p.704-716, a professional article "A pilot intervention with chitosan/cotton knitted jersey fabric to provide comfort for epidermolysis bullosa patients" was published, Ngan Yi Kitty Lam, Meng Zhang, Chenxiao Yang, Chu Po Ho and

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Li Li. It deals with the issue of the relationship between the percentage of chitosan composition in smooth jersey knitwear and its effect on comfort parameters from the point of view of the needs of patients with EB.

The authors conclude that a fabric with added chitosan fibers as part of the material composition will provide better smoothness, softness and thermal conductivity, which will contribute to the reduction of friction between the clothing and the patients' skin.

The essence of the technical solution

The goal of this technical solution is to create a flat textile that has low friction, a very fine texture and physiological properties.

This objective is achieved by a flat fabric in the form of a knit with a low coefficient of friction and excellent texture for clothing patients with a rare skin disease, the textile containing a mono- or multifilament of modified polypropylene with integrated cellulose, with a length weight of 50 dtex to 250 dtex.

Preferably, this flat textile contains yarn from regenerated cellulose fibers with a length weight of 10 to 25 tex.

The flat fabric is preferably in the form of a single-faced underlaid knitwear, or in the form of a double-faced knitwear, or in the form of a single-faced underlaid patterned knitwear.

It is also advantageous if said yarn made of regenerated cellulose fibers is made of polyamide or modal fibers.

Monofilament or multifilament from modified polypropylene preferably has antibacterial effects.

Said multifilament from modified polypropylene is preferably scanned.

Said multifilament from modified polypropylene is preferably smooth.

Multifilament from modified polypropylene preferably comprises 30 to 98% by weight. flat textiles.

Yarns from regenerated cellulose fibers preferably comprise 2 to 70% by weight. flat textiles.

The flat textile, in the form of a knitted fabric, is made as a special structure composed of modified polypropylene fibers, possibly with the addition of fibers based on regenerated cellulose.

Specially modified polypropylene fibers have an ultra-low coefficient of friction and preferentially integrated permanent antibacterial protection with an active antimicrobial agent that controls and prevents skin infections without side effects (does not change the natural bacterial flora of the skin and mucous membranes). The fibers are ideal for use on parts of the body where movement causes friction. They are very suitable for people with skin diseases as they provide immediate relief and prevent irritation. The fibers are in the form of multifilament or monofilament. Polypropylene multifil with a length weight of 50 to 150 dtex is preferably used.

In the structure of the knitted fabric, yarn from modal fibers with a length weight of, for example, 20 tex can also be used, which contributes to ensuring optimal physiological properties. Modal fibers are made from regenerated cellulose, have good strength, high elasticity, absorb liquids well and are gentle on the skin. Compared to standard viscose fibers, they have better tenacity and moisture absorption.

Polyamide fibers with a smooth surface can also be used.

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The structure of the textile is important, which, together with the material composition, provides sensory and physiological comfort, as well as the ability to easily remove creams and ointments that are applied to the skin in case of skin diseases. The knit glides smoothly over the skin and absorbs the harmful friction that can damage the skin. At the same time, it helps to easily remove dirt by washing, when the washing bath temperature of 40 °C is sufficient.

Clarification of drawings

The technical solution is further described in more detail on the basis of exemplary designs and drawings, on which there are diagrams of exemplary knitted fabrics.

An example of the implementation of a technical solution

The primary requirement for flat textiles is sensory and physiological comfort. A secondary observed property is the easy removal of ointments and creams that are applied to the skin of patients with rare skin diseases.

From the point of view of these requirements, knitted fabrics were chosen in the form of single-faced underlay, patterned knit called double face and single-faced pattern - underlaid.

The side that is intended for contact with the skin has a smooth surface and an excellent texture, which is level 5 according to the THV scale, evaluated on the KAWABATA device. On this device, the primary taste of HV is expressed by the useful properties KOSHI - HARDNESS, NUMERI - SMOOTHNESS, FUKURAMI - FULLNESS, SOFTNESS, which are considered basic indicators for the chosen purpose of use. According to the intensity of their manifestation, they are evaluated on a scale of 1 to 10, where 10 represents a strong manifestation of the characteristic in the flavor evaluation. The final overall evaluation of the texture of the fabric is referred to as the total texture THV - TOTAL HAND VALUE. It acquires values in the scale shown in the table below.

THV CLASSIFICATION table

Degree of sauce Band by degrees Verbal description of omak 1 0.5 -1.5 Unsatisfactory, very bad 2 1.6-2.5 Below the average 3 2.6-3.5 Average 4 3.6-4.5 Above average, very good 5 4.6 - 5.5 Excellent,

Example 1

Machine name: RELANIT R3.2

Machine pitch: 28 E, machine diameter 30", number of needles: 2640

Description of the knitted fabric: single-faced pattern - lined

Material: 1. multifil with a length weight of 110 dtex from modified polypropylene with an antibacterial effect, while the antibacterial effect is achieved with the help of zinc ions integrated into the polymer matrix, proportion in the knitted fabric: 35% mass.. The modification consists in the integration of cellulose into the spun melt during the production of the fiber.

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2. Yarn with a length weight of 20 tex from modal, proportion in the knitted fabric: 65% by weight.

The drawing of the weave is in Fig. 1, with the light blue color representing modal and the red color polypropylene.

The knitted fabric showed below-average stiffness, above-average smoothness and high fullness and softness in the primary properties. The overall taste with a THV number of 5.15 lies in the zone of excellent taste.

The modified polypropylene fiber has an integrated cellulose component in its structure, and the result is a fiber that combines the best of the properties: excellent thermal insulation, moisture removal, breathability and lightness of the polypropylene fiber, softness and pleasant taste provided by cellulose.

Example 2

Machine name: METIN NOV

Machine division: 20E. machine diameter 30", number of needles 1920

Knit description: double face (two independent single-faced knits connected by a catch weave)

Material: 1. multifil with a length weight of dtex 56 from modified polypropylene (see

Example 1) with an integrated cellulose component in the structure and with an antibacterial effect, while the antibacterial effect is achieved with the help of zinc ions integrated into the polymer matrix, proportion in the knitted fabric: 97% by weight.

2. multifil, dtex 13 made of polyamide, proportion in knitted fabric: 3% by weight.

The drawing of the weave is in Fig. 2, with the purple color representing multifil from modified polypropylene and the red color polyamide.

The knitted fabric showed very low stiffness, high smoothness, excellent fullness of texture and softness in the primary properties. The overall sauce with a THV number of 5.37 lies in the zone of excellent, excellent sauce.

Example 3

Name of the machine: M-RSE- mini zakar

Machine division: 24 E, machine diameter 30", number of needles 2240

Description of the knitted fabric: single-faced pattern - lined

Material: 1. Multifil with a length weight of dtex 56 x2 from modified polypropylene (see example 1) with an integrated cellulose component in the structure and with an antibacterial effect thanks to zinc ions that are integrated into the polymer matrix, proportion in the knitted fabric: 82% by weight.

2. Multifil with a length weight of dtex 56 x1 from modified polypropylene with an integrated cellulose component in the structure and with an antibacterial effect thanks to zinc ions that are integrated into the polymer matrix, proportion in the knitted fabric: 18% by weight.

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The connection drawing is in Fig. 3.

The knitted fabric showed low, below-average shear and bending stiffness (KOSHI), above-average smoothness (NUMERI) and high above-average volume of the product (FUKURAMI).

The total flavor with the number 5.17 is in the zone of excellent flavor of a product of this category.

Claims (9)

1. A flat textile in the form of a knitted fabric with a suitable coefficient of friction and texture for clothing patients with a rare skin disease, characterized by the fact that it contains mono- or multifilament from modified polypropylene with integrated cellulose, with a length weight of 50 dtex to 250 dtex. 2. Flat textile according to claim 1, characterized in that it contains yarn from regenerated cellulose fibers with a length weight of 10 to 25 tex. 3. A flat textile according to claim 1 or 2, characterized in that it is in the form of a single-faced underlaid knitted fabric, or in the form of a double-faced knitted fabric, or in the form of a single-faced underlaid patterned knitted fabric. 4. Flat textile according to claim 2 or 3, characterized in that the yarn made of regenerated cellulose fibers is made of polyamide or modal fibers. 5. Flat textile according to any one of claims 1 to 4, characterized in that the mono- or multifilament of modified polypropylene is of modified polypropylene with antibacterial effects. 6. Flat textile according to any one of claims 1 to 5, characterized in that the multifilament of modified polypropylene is woven. 7. Flat textile according to any one of claims 1 to 5, characterized in that the multifilament of modified polypropylene is smooth. 8. Flat textile according to any one of claims 1 to 7, characterized in that the multifilament of modified polypropylene constitutes 30 to 98% by weight. flat textiles. 9. Flat textile according to any one of claims 1 to 8, characterized in that the yarns from regenerated cellulose fibers make up 2 to 70% by weight. flat textiles.