RU2422565C2 - Non-combustible antimicrobial thread or yarn and textile material based thereon - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: non-combustible antimicrobial polyethylene terephthalate thread or yarn is a complex or modified antimicrobial or anti-combustion component and has density index of 2-250 tex or 2 texX2-125 texX2.

EFFECT: longevity and safety of textile materials during use, particularly improvement in antimicrobial and fire-protective properties.

10 cl, 5 tbl

Description

The group of inventions relates to textile products, and more specifically to synthetic yarn or yarn, modified in the process of its production by an additive with antimicrobial action and a modifier that gives it non-combustible (fire-resistant) properties, and textile material based on it. Such threads or yarn melt, but do not burn, and can be used in light industry for the manufacture of textile materials and products from them, namely: covers and upholstery for furniture and vehicle seats (in cars, trains, planes, ships, etc. ), protective and special clothing, including gloves for firefighters, car racers, submariners, astronauts, etc., as well as bedspreads, mattress covers, tablecloths, curtains, etc., in hospitals, resorts, boarding houses, etc.

Known variants of a hosiery made of yarn, at least part of which includes synthetic thread (fiber), modified with an additive with antimicrobial action (RU 74774, class A41B 11/00, published July 20, 2008).

Also known is a decorative fabric with reduced flammability made of fireproof polyester threads or yarn in combination with a combustible component (cotton, rayon, linen) with a ratio of non-combustible and combustible components equal to 20: 80-80: 20 (RU 2353720, class D03D 15 / 00, published 2009.04.27).

Known fabric is intended for use as decorative upholstery materials for the purpose of interior decoration of public buildings, institutions and vehicles, therefore, it does not have high requirements for antimicrobial processing.

In addition, its fire-retardant properties are significantly limited, since it is a blended one and, along with fire-resistant threads or yarn, it includes a combustible component, and the invention provides, in particular, a ratio of non-combustible and combustible component equal to 20:80, which makes this material quite vulnerable to fire.

Textile products, especially those that have direct contact with the skin, are negatively affected by various microorganisms located on the skin, including gram-negative and gram-positive bacteria, causing various spots to appear on these products and giving them undesirable odors, as well as their fading, while these microorganisms weaken the strength of the products and cause their cross-contamination. At the same time, materials and products that are in common use, in turn, can have a negative impact on the consumer in terms of finding and transferring undesirable microorganisms from one person to another.

The technical problem of the proposed invention is to create a textile product that combines antimicrobial and fire retardant properties.

The technical result of the invention is to ensure durability and safety in operation, in particular increasing the antimicrobial and fire retardant properties of products in the human circulation sphere made of the proposed threads or yarns and from textile materials based on them.

Additional advantages of the proposed facilities include: better air permeability, vapor permeability, lightness and elasticity of threads or yarns and textile materials based on them, as well as their inherent prolonged antimicrobial effect, which contributes to a significant slowdown in the growth of bacteria on their surface.

The named technical result is achieved in the invention due to the following set of features.

Non-combustible antimicrobial thread or yarn is made of synthetic polymeric material and modified with anti-combustible and antimicrobial components.

In an advantageous embodiment of the invention, the thread or yarn is made of polyester yarns (fibers) obtained from such a synthetic polymer material as polyethylene terephthalate, and the antimicrobial additive (antimicrobial additive) contains silver ions, while the non-combustible additive contains phosphorus or methoxyphospholane.

The specified thread (yarn) can be made smooth, or textured, or profiled, which in the last two embodiments of the invention will increase the antibacterial properties of a woven or knitted product made from it by increasing the contact area of the threads (fibers) with the skin, adding to this an improvement in performance products, in particular such as: elasticity and resilience also due to the implementation of a complex (multifilament) thread, with a filamentation index f 16-112.

Also, the thread can be made pneumatically connected.

The fineness of the thread (yarn) lies in the range of values: 2 tex - 250 tex - 2 tex × 2-125 tex × 2.

The non-combustible antimicrobial textile material is made on the basis of a synthetic polymer thread or yarn modified with anti-combustible and antimicrobial components.

In an advantageous embodiment of the invention, the thread or yarn included in said material is made of polyester threads (fibers), the antimicrobial additive (antimicrobial additive) contains silver ions, and the anti-combustible additive contains phosphorus or methoxyphospholane.

The thread (yarn) from which the specified material is made can be made smooth or textured or profiled, which in the last two embodiments of the invention will increase the antibacterial properties of a woven or knitted product made of this material by increasing the contact area of the threads (fibers) with the skin, adding this is the improvement of the operational properties of the fabric and the product made from it, in particular such as: elasticity and elasticity also due to the implementation of this complex thread (polyfilame tnoj), a measure of filament f 16-112.

Also, said material may be made of a pneumatically connected thread.

The fineness of the thread (yarn) of the specified material lies in the range of values: 2 tex - 250 tex ÷ 2 tex × 2-125 tex × 2.

In accordance with the invention, a synthetic material such as polyethylene terephthalate (PET) is used as the polyester backbone of the yarn (yarn). Unlike natural ones, this thread (yarn) is characterized by significant mechanical abrasion and tear strength, as well as elasticity and biostability.

The filaments or fibers that make up the proposed thread (yarn) have a high modulus of elasticity, due to which the products made from it perfectly retain their shape and restore it even after prolonged exposure to external force, so they do not wrinkle and are stable in shape. The specified thread (yarn) is characterized by a low specific gravity.

The proposed thread (yarn) and material based on it are resistant to acids and alkalis, as well as oxidizing agents and reducing agents.

Knitted and textile products from these chemically inert threads (yarn) can be worn by the most sensitive (allergic-dependent) people.

The antimicrobial additive (additive) of the thread (yarn) can contain silver in various forms (ions, salts, metal, zeolites, compounds, for example, with zinc), which provides the above properties.

Also, in addition to silver, other substances can be used for antimicrobial treatment of threads (yarn), for example, such as: triclosan, copper oxides, natural chitosan, etc.

An antimicrobial additive, for example, containing silver ions, has multiple effects on bacterial life processes, preventing the growth of fungi, gram-positive and gram-negative bacteria and mold, as well as various infections, thereby improving foot hygiene and reducing the unpleasant odor of sweat. Mentioned additive provides a lasting effect, ease of integration, minimal fading, the absence of friction and clogging during spinning, as well as the absence of mechanical deformation of twisted fibers.

The drawing shows a diagram of a process for producing antimicrobial anti-combustible threads (yarn), dyed in bulk.

Amorphous granulate (PET) through a transport system is first supplied to a daily container 1, from which it passes through a rotary dispenser 2 to a crystallizer 3, where this granulate is heated by circulating air and thoroughly mixed to prevent the granules from sticking together.

After completion of the crystallization process, the granulate is poured into a vertical shaft dryer 4, from which the dried granulate is piped to a gravimetric unit 5.

The polymer dye concentrate (PAC) is loaded into a container 6, from which it is fed through a conveyor to a dryer 7, and then to a gravimetric unit 5.

Antimicrobial (AMD) and anti-combustible (AGD) additives are loaded into the corresponding containers 8 and 9 (it is possible in one container), of which (through) they are fed to the dryer 10 by means of conveyors (a) and then to the gravimetric block 5.

From the gravimetric block 5, the granulate mixture, which includes: PET, PAC, AMD and AGD, enters the extruder 11 through a loading funnel, where they are melted and homogenized.

The obtained melt is fed to the molding heads 12, and from there it flows under pressure to the four-chamber spinning metering pumps 13, each of which measures the melt flow into four dies.

Next, the melt is fed by a spinning pump to a spinneret kit, where it is finely filtered. After exiting the spinneret, the trickles of melt fall into the blower shaft 14. Due to the difference between the molding speed and the winding speed on the winding heads 15, an elementary thread or yarn fibers are drawn.

Since a bacterium-resistant antimicrobial additive containing silver ions as well as an anti-combustible additive are added to the mass of filaments during their formation, and not to their surface as a result of, for example, impregnation, they do not migrate from the products to the skin, and therefore, it is sufficient stored for a long time in textile material and products made of these threads (yarn), even after repeated washing and cleaning of these products and textile material.

The proposed threads (yarn) can be produced: smooth complex, textured, untwisted, pneumoconnected, unpainted and dyed in the range of linear densities: 8.2-16.7 tex for smooth threads and 8.4-16.7 × 2 tex for textured threads . The oxygen index of the thread is at least 30%.

Table 1 summarizes the physicomechanical parameters of a polyester complex filament profiled pneumocouple with non-combustible and antimicrobial properties with a nominal linear density of 16.5 tex, with a filament index f of 32.

Such a thread can be used for the manufacture of: home textiles, workwear, non-woven materials, curtain fabrics, as well as decorative, decorative and upholstery materials.

Table 1 Name of indicator Indicator value Specific breaking load, mN / tex, not less 260,0 Elongation at break,% 35.0 ± 5.0 Coefficient of variation on elongation of the thread at break,% no more 10.0 Deviation of the actual linear density from the nominal,% ± 2.0 Coefficient of variation in linear density,%, no more 2.0 Number of pneumatic connections per 1 meter of thread, not less 25 Linear shrinkage,% 5 ÷ 10 Oxygen Index (CI),% vol., Not less thirty

Table 2 summarizes the physico-mechanical properties of a polyester textured yarn pneumatically connected with non-combustible and antimicrobial properties with a nominal linear density of 33.4 tex, with a filament index f of 96.

Such a thread, like the previous one, can be used for the manufacture of: home textiles, workwear, non-woven materials, curtain fabrics, as well as decorative and upholstery materials.

table 2 Name of indicator Indicator value Specific breaking load, mN / tex, not less 260,0 Elongation at break,% 23.0 ± 5.0 Coefficient of variation on elongation of the thread at break,% no more 10.0 Deviation of the actual linear density from the nominal,% ± 2.5 Number of point pneumatic connections per 1 meter of thread, not less one hundred Linear shrinkage,% 5,0 Mass fraction of sizing,% 0.7 ÷ 3.7 Oxygen Index (CI), vol.%, Not less than thirty

Several experiments were carried out to confirm the antibacterial properties of threads (yarn), in particular, sterility was seeded in accordance with the order of the Ministry of Health of the USSR No. 720.

Made in accordance with the above method, the complex polyester thread was cut into small pieces 1-2 cm long and pulled apart for possible germination of microorganisms.

Sowing was carried out in 3 tubes with thioglycolic medium, 3 tubes with Saburo medium and 3 tubes with Hottinger sugar broth, placing 4-5 pieces of test material in each. The material was taken in 5 repetitions at different lengths of the thread (upper, lower and from the center). For control, seeding was performed on ENDO, Saburo and blood agar media.

The experimental results are summarized in table 3.

Table 3 the control Polyester thread with silver ions Thioglycol medium 0 0 0 0 0 0 0 0 0 0 0 Saburo 0 0 0 0 0 0 0 0 0 0 0 Sugar
bouillon 0 0 0 0 0 0 0 0 0 0 0

The strand was also tested for several bacteria. The experimental results are summarized in tables 4 and 5.

Table 4 Thread pattern Test bacteria
Escherichia coli Staphylococcus aureus A AT FROM BUT AT FROM Polyester thread with silver ions 2 3.6 2.2 2 3.8 2.2 Test bacteria: Staphylococcus aureus - ATCC ™ 29213 Escherichia coli - ATCC ™ 25922 The number of parallel measurements is three. And - the specified number of bacteria / ml according to McFarland before inoculation. B is the average number of bacteria / ml according to McFarland after inoculation without adding strands after 24 hours. C is the average number of bacteria / ml according to McFarland after inoculation with the addition of threads after 24 hours.

Table 5 Thread pattern Test bacteria
Enterococcus faecalis Candida albicans A AT FROM BUT AT FROM Polypropylene thread with silver ions 2 3.2 2.2 2 4.6 2.2 Test bacteria: Enterococcus faecalis - ATCC ™ 29212 Candida albicans - ATCC ™ 2091 The number of parallel measurements is three. And - the specified number of bacteria / ml according to McFarland before inoculation. B is the average number of bacteria / ml according to McFarland after inoculation without adding strands after 24 hours. C is the average number of bacteria / ml according to McFarland after inoculation with the addition of threads after 24 hours.

Textile and knitted materials (products) made on the basis of the proposed yarns or yarns, which have non-combustible and antimicrobial properties, retain their fireproof and antimicrobial properties during many years of operation, despite repeated washing and cleaning. In the event of a fire, smoldering does not occur on such materials and they do not support combustion, which distinguishes them from the well-known materials widely used in transport, in public places and in the manufacture of special clothing.

Claims (10)

1. Non-combustible antimicrobial thread or yarn, characterized in that it is made of polyethylene terephthalate complex and modified with anti-combustible and antimicrobial components, while the anti-combustible additive contains phosphorus or methyloxyphospholane, and the linear density of the thread or yarn is 2 tex-250 tex or 2 tex 2-125 tex × 2. 2. The thread or yarn according to claim 1, characterized in that the antimicrobial additive contains silver ions. 3. The thread or yarn according to claim 1, characterized in that it is made smooth, or textured, or profiled. 4. The thread or yarn according to claim 1, characterized in that it is made pneumatically connected. 5. The thread or yarn according to claim 1, characterized in that the indicator of its filamentity f is 16-112. 6. Non-combustible antimicrobial textile material, characterized in that it is made on the basis of a complex polyester yarn or yarn modified with anti-combustible and antimicrobial components, while the anti-combustible additive contains phosphorus or methoxyphospholane, and the linear density of the thread or yarn is 2 tex-250 tex or 2 tex × 2-125 tex × 2. 7. The material according to claim 6, characterized in that the antimicrobial additive contains silver ions. 8. The material according to claim 6, characterized in that the thread or yarn on the basis of which it is made has a smooth, or textured, or profiled structure. 9. The material according to claim 6, characterized in that the thread on the basis of which it is made is pneumatically connected. 10. The material according to claim 6, characterized in that the filamentation index f of the thread, on the basis of which it is made, is 16-112.

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