SK286737B6 - Antimicrobial polypropylene fiber - Google Patents

Abstract

An antimicrobial polypropylene fiber contains isotactic polypropylene in portion from 97.0 to 99.8 % by weight and an inorganic antimicrobial additive in portion from 0.2 to 1.5 % by weight, eventually the fiber contains colouring pigments for solution dyeing of polypropylene fiber in portion to 1.5 % by weight. The inorganic antimicrobial additive contains an ingredient based on silver anchored in an inert carrier, which is TiO2, BaSO4 and ZnO or SiO2.

Description

The present invention is in the field of chemical fiber production and relates to a cut or dyed polypropylene fiber with antimicrobial properties that provides a defined addition of an inorganic antimicrobial additive to the polypropylene fiber mass.

BACKGROUND OF THE INVENTION

Polypropylene fibers with antimicrobial modification are known which provide for the addition of an organic biocidal compound based on halogenated hydroxyphenyl ether to the mass of the polypropylene fiber. The present organic antimicrobial modifier is used in the production of polypropylene staple fibers. Further known are antimicrobial organic modifiers containing 5% chlorohydridine (EP 0050438), a fungicidal composition with tolchlorphos-methyl [0,0-dimethyl-O- (2,6-dichloro-4-methylphenyl) phosphorothionate] as an active ingredient anchored on mica as carriers (EP 0111843), a microbiocidal composition based on arylalkanes (e.g. benzyl alcohol) and a microbiocidal component for treating various plastics (EP 0168949), a mixed acrylate polymer containing a 5 to 50% copolymer with a biocidal compound (GB 98054877) for use in antimicrobial treatment of plastics, rubber and textiles. It is known to prepare copper-containing polymers which, when applied directly, are fungicidal (EP0208858).

The antimicrobial component of the modifiers is essentially based on organic compounds, which implies some sanitary, environmental and toxicological limitations in their application, in particular due to the lower thermal stability of the modifiers, their increased migration ability and the associated reduced shelf life, as well as often undesirable odor in the preparation of the product and in the final modified product.

SUMMARY OF THE INVENTION

The present invention provides an antimicrobial polypropylene fiber comprising isotactic polypropylene in a proportion of from 97.0 to 99.8% by weight, an inorganic antimicrobial additive in a proportion of from 0.2 to

1.5% by weight, optionally containing pigments for dyeing the polypropylene fiber in a mass of up to 1.5% by weight

1.5% by weight, wherein the inorganic antimicrobial additive has an Ag-based active ingredient anchored on an inert inorganic carrier which is TiO ₂ , BaSO ₄ and ZnO or SiO ₂ .

The advantage of the antimicrobial polypropylene fiber according to the present invention is the use of an inorganic antimicrobial additive in its mass, which is thermally stable, does not undergo migration in the mass, ensuring long-term effectiveness of the antimicrobial modification, does not cause odor Textile products are fully acceptable from a hygienic, environmental and toxicological point of view. The inorganic antimicrobial additive is incorporated into the mass of the polypropylene fiber, in particular by a process defined by the melt of its concentrate with an isotactic polypropylene carrier into the melt of the isotactic polypropylene mainstream melt in the process of producing antimicrobial polypropylene fibers.

The antimicrobial polypropylene fiber of the present invention may take the form of continuous polypropylene textile silk, continuous polypropylene technical silk, continuous textile cable (BCF), as well as staple fibers of different lengths of cut, and can be manufactured on existing standard machine technology technological polypropylene fiber production facilities. production of equivalent types of unmodified fibers, in the ranges of textile silk, technical silk, textile cable (BCF) and staple fibers.

The evaluation of the antimicrobial properties of the polypropylene fiber of the present invention in accordance with AATCC-100-1988 confirmed their high antimicrobial activity against both gram-positive and gram-negative bacteria, as well as their long-lasting modification efficacy in fabrics made therefrom after 95 wear and maintenance cycles. textiles.

DETAILED DESCRIPTION OF THE INVENTION

Example 1

An antimicrobial polypropylene staple of length 2.2 dtex consisting of isotactic polypropylene in a proportion of 99.4% by weight was prepared by a standard technological process by continuous low-speed production technology. and an inorganic antimicrobial additive with the active ingredient Ag, anchored on an inert inorganic TiO ₂ carrier, the so-called. % BIOSTAT-T, in a proportion of 0.6 wt.

According to AATCC-100-1988, the following antimicrobial activity was determined:

(a) for Gram-positive bacteria (Staphylococus aureus CCM 3935, Micrococcus lylae CCM 2693): Y = 51,2% (bacteriocidal activity),

(b) for Gram-negative bacteria (Escherichia coli CCM 3954, Esterichia coli CCM 4787): X = 50,7% (bacteriostatic activity), whereby the bacteriostatic activity X [%] is X = [(B-C) J]. 100 and the bacteriocidal activity Y [%] is Y = [(A-C)]. 100, where

A is the number of bacteria on unmodified standard polypropylene fiber of the same length at T = 0 h,

B is the number of bacteria on unmodified standard polypropylene fiber of the same length at T = 24 h after incubation of the bacteria,

C is the number of bacteria on an antimicrobial polypropylene fiber of the same length at T = 24 h after incubation of the bacteria.

Example 2

A standard technological process of continuous low-speed production technology prepared a matt antimicrobial polypropylene staple of 1.7 dtex of isotactic polypropylene in a proportion of 99.3% by weight. and an inorganic antimicrobial additive with the active ingredient Ag, anchored on an inert inorganic TiO ₂ carrier, the so-called " BIOSTAT-T in a proportion of 0.5 wt. and matting pigment TiO ₂ in a proportion of 0.2 wt.

According to AATCC-100-1988, the following antimicrobial activity was determined:

(a) for Gram-positive bacteria (Staphylococus aureus CCM 3935, Micrococcus lylae CCM 2693): Y = 40,1% (bacteriostatic activity),

(b) for Gram-negative bacteria (Escherichia coli CCM 3954, Esterichia coli CCM 4787): X = 61,1% (bacteriostatic activity).

Example 3

A standard antimicrobial polypropylene staple of 3.9 dtex, consisting of isotactic polypropylene in a proportion of 99.09% by weight, was prepared by standard low-speed continuous production technology. and an inorganic antimicrobial additive with the active ingredient Ag, anchored on an inert inorganic carrier BaSO _4, so-called " % BIOSTAT-B, in a proportion of 0.25 wt. and black pigments in a proportion of 0.66 wt.

According to AATCC-100-1988, the following antimicrobial activity was determined:

(a) for Gram-positive bacteria (Staphylococus aureus CCM 3935, Micrococcus lylae CCM 2693): X = 48,1% (bacteriostatic activity),

(b) for Gram-negative bacteria (Escherichia coli CCM 3954, Esterichia coli CCM 4787): X = 56,1% (bacteriostatic activity).

Example 4

A standard antimicrobial polypropylene staple of 6.7 dtex, consisting of isotactic polypropylene in a proportion of 99.5% by weight, was prepared by standard low-speed continuous production technology. and inorganic antimicrobial additives BIOSTAT-B in a proportion of 0.3 wt. and a matt TiO ₂ pigment in a proportion of 0.2 wt.

According to AATCC-100-1988, the following antimicrobial activity was determined:

(a) for Gram-positive bacteria (Staphylococus aureus CCM 3935, Micrococcus lylae CCM 2693): X = 52,8% (bacteriostatic activity),

(b) for Gram-negative bacteria (Escherichia coli CCM 3954, Esterichia coli CCM 4787): X = 51,3% (bacteriostatic activity).

Example 5

A standard antimicrobial polypropylene staple of 17.0 dtex, consisting of isotactic polypropylene in a proportion of 98.88% by weight, was prepared by standard low-speed continuous production technology. and inorganic antimicrobial additives BIOSTAT-B in a proportion of 0.25 wt. and a mixture of brown pigment pigments in a proportion of 0.87 wt.

According to AATCC-100-1988, the following antimicrobial activity was determined:

(a) for Gram-positive bacteria (Staphylococus aureus CCM 3935, Micrococcus lylae CCM 2693); X = 54.0% (bacteriostatic activity),

(b) for Gram-negative bacteria (Escherichia coli CCM 3954, Esterichia coli CCM 4787): Y = 27,8% (bacteriocidal activity).

Example 6

A standard antimicrobial polypropylene textile silk of 110/33 dtex of isotactic polypropylene in a proportion of 99.5 wt. and an inorganic antimicrobial additive with the active ingredient Ag, anchored on an inert inorganic ZnO carrier, so-called " BIOSTAT-L in a proportion of 0.5 wt.

According to AATCC-100-1988, the following antimicrobial activity was determined:

(a) for Gram-positive bacteria (Staphylococus aureus CCM 3935, Micrococcus lylae CCM 2693): X = 52,4% (bacteriostatic activity),

(b) for Gram-negative bacteria (Escherichia coli CCM 3954, Esterichia coli CCM 4787): X = 68,9% (bacteriostatic activity).

Example 7

A matt antimicrobial polypropylene textile silk of 56/16 dtex of isotactic polypropylene in a proportion of 98.7 wt. and an inorganic antimocrobial additive BIOSTAT-T in a 1.0 wt. and matting TiO ₂ pigment in a proportion of 0.3 wt.

According to AATCC-100-1988, the following antimicrobial activity was determined:

(a) for Gram-positive bacteria (Staphylococus aureus CCM 3935, Micrococcus lylae CCM 2693): X = 36,8% (bacteriostatic activity),

(b) for Gram-negative bacteria (Escherichia coli CCM 3954, Esterichia coli CCM 4787): Y = 26,3% (bacteriocidal activity).

Example 8

Blue antimicrobial polypropylene textile silk with a weight of 110/33 dtex consisting of isotactic polypropylene in a proportion of 97.67% by weight, inorganic antimicrobial additive BIOSTAT-B in a proportion of 1.0% by weight was prepared by standard technology. and a mixture of blue pigment pigments in a proportion of 1.33 wt.

According to AATCC-100-1988, the following antimicrobial activity was determined:

(a) for Gram-positive bacteria (Staphylococus aureus CCM 3935, Micrococcus lylae CCM 2693): X = 61,7% (bacteriostatic activity),

(b) for Gram-negative bacteria (Escherichia coli CCM 3954, Esterichia coli CCM 4787): X = 65,9% (bacteriostatic activity).

Example 9

A standard antimicrobial polypropylene staple of 17.0 dtex of 97.63% by weight isotactic polypropylene was prepared by standard low-speed continuous production technology. and an inorganic antimicrobial additive with the active ingredient Ag, anchored on an inert inorganic SiO ₂ carrier, so-called " BIOSTAT-K in a proportion of 1.5 wt. and a mixture of brown pigment pigments in a proportion of 0.87 wt.

The following antimicrobial activity was determined according to AATCC-100-1988

(a) for Gram-positive bacteria (Staphylococus aureus CCM 3935, Micrococcus lylae CCM 2693): Y = 14,0% (bacteriocidal activity),

(b) for Gram-negative bacteria (Escherichia coli CCM 3954, Esterichia coli CCM 4787): X = 60,1% (bacteriostatic activity).

Example 10

A standard antimicrobial polypropylene technical silk of 1100/100 dtex isotactic polypropylene in a proportion of 99.25% by weight. and inorganic antimicrobial additives BIOSTAT-B in a proportion of 0.75 wt.

According to AATCC-100-1988, the following antimicrobial activity was determined:

(a) for Gram-positive bacteria (Staphylococus aureus CCM 3935, Micrococcus lylae CCM 2693): Y = 25,6% (bacteriocidal activity),

(b) for Gram-negative bacteria (Escherichia coli CCM 3954, Esterichia coli CCM 4787): X = 53,0% (bacteriostatic activity).

Industrial usability

The antimicrobial polypropylene fiber of the present invention is suitable for the following textile and technical applications:

- garments-knitwear - underwear, terry fabrics, socks, sportswear, casual wear, t-shirts, vests, piece products, gloves, etc.,

- fabrics - hygienic, medical and protective workwear, technical fabrics, bed linen (including mixed yarns with natural fibers) and others,

- carpets - floor coverings of antimicrobial staple, yarn and BCF,

- soft furnishings - curtains, furniture upholstery fabrics, textile wallpapers, etc.,

- non-woven fibrous materials - food and air conditioning filters,

- antimicrobial barrier layers for upholstery, insulation and technical applications, shoe nets.

They can be applied in 100% form as well as in blends with natural and synthetic fibers.

PATENT CLAIMS

Claims (2)

Antimicrobial polypropylene fiber, characterized in that it contains isotactic polypropylene in a proportion of from 97.0 to 99.8% by weight, inorganic antimicrobial additive in a proportion of from 0.2 to 1.5% by weight, optionally containing coloring pigments % of polypropylene fiber in the mass in a proportion of up to 1.5 wt. Antimicrobial polypropylene fiber according to claim 1, characterized in that the inorganic antimicrobial additive comprises an Ag-based active ingredient anchored on an inert inorganic carrier which is TiO ₂ , BaSO ₄ , ZnO or SiO ₂ .