SK942015U1 - Concentrate for the preparation polypropylene fibers modified by soft cellulose its use - Google Patents

Abstract

A concentrate comprising a polypropylene carrier of from 40 to 60% by weight, colored pigments from 1 to 20% by weight, polyethylene wax from 5 to 15% by weight, amorphous silica from 0.5 to 1.5% by weight is described. and fine cellulose having a particle size of from 6 to 12 µm in an amount of from 1 to 20% by weight. The concentrate is used for the preparation of polypropylene fibers and for applications in textile products.

Description

(54) Title Concentrate for the preparation of modified polypropylene fibers with fine cellulose and its use (57) Annotation:

A concentrate is described which contains a polypropylene carrier from 40 to 60% by weight, color pigments from 1 to 20% by weight, polyethylene wax from 5 to 15% by weight, amorphous silica from 0.5 to 1.5% by weight. and fine cellulose with a particle size of from 6 to 12 μm in an amount of from 1 to 20% by weight. The concentrate is used for the preparation of polypropylene fibers and for applications in textile products.

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Technical field

The technical solution falls into the field of polymer chemistry, especially in the production of mass-modified synthetic fibers and plastics with a special focus on achieving surface modification. The aim is to provide a surface modification of polypropylene fibers so as to obtain the surface properties characteristic of natural fibers, such as cotton or wool.

Prior art

Synthetic polymers are currently produced worldwide in millions of tons and have a wide range of applications. Polypropylene for textile applications is treated by the addition of suitable additives, of which the most commonly used are pigments for dyeing, flame retardants, ultraviolet absorbers, antibacterial additives and others.

The essence of the technical solution

The essence of the technical solution is the use of a special additive. which is fine cellulose. whose average particle size is from 6 to 12 micrometers.

The basis is the preparation of 10-20% cellulose concentrate on a polypropylene carrier using polyethylene waxes, amorphous silica as a compatibilizer. Such a concentrate can be used to modify polypropylene fibers with such a dosage that the concentration of fine cellulose in the polypropylene fiber is between 0.8-2.0% by weight. . for fibers with a unit length of from 0.9 to 10 dtex. Preferably for fibers with a length of from 0.9 to 5.0 dtex for application in textile products where the concentration of cellulose in the polypropylene fiber is from 0.8 to 2.0 % wt. brings an effect similar to natural fibers. The waxy effect that is characteristic of polypropylene fibers is lost.

Modified polypropylene fibers produced with the addition of a descriptive concentrate are suitable for textile products either 100% by the modified polypropylene fiber or in a mixture with other fibers, the preferred ratio being 10 to 90% by weight. for modified polypropylene fiber.

L.:. *.:. *.:. ... ^: iOther advantages of textile products that use polypropylene fiber modified with fine cellulose include reduced odor spread, increased antibacterial effectiveness of silver-modified polypropylene fibers, the possibility of surface dyeing, improved thermal insulation properties of textile products for direct contact with human skin, a pleasant touch , reduction of adverse environmental impacts and carbon dioxide emissions.

Examples of embodiments

Example No. 1

In a high-speed mixer, 5.0 kg of a mixture of polyethylene waxes, amorphous silica as a compatibilizer are mixed into 40 kg of polypropylene powder. The mixture was stirred at constant speed for 3 minutes. Subsequently, 5.0 kg of cellulose was added and the whole mixture was stirred at constant speed for 6 minutes. The mixture thus prepared is kneaded and melted on a twin-spindle kneader and subsequently granulated. The prepared concentrate has a flow index of 12 g / 10 min (at 230 ° C and a load of 2.16 kg) and a filterability of 15 MPa / kg. These properties allow the addition of polypropylene fibers with a unit weight of 0.9 to 10 dtex. Preferably, at a dosage of 8% by weight. of the concentrate into the fiber, modified polypropylene fibers with a unit length weight of 0.9 - 5.0 dtex with the character of natural fibers are produced, especially if they are used as a contact layer in contact with the skin.

Example No.2

In a high-speed mixer, 10 kg of a mixture of polyethylene waxes and amorphous silica as a compatibilizer are mixed into 29 kg of polypropylene powder. The mixture was stirred for 3 minutes. Subsequently, 1.0 kg of antibacterial additive and 10 kg of cellulose are added and the whole mixture is stirred for 8 minutes at constant speed. The mixture thus prepared is kneaded and melted on a twin-spindle kneader and subsequently granulated. The prepared concentrate has a flow index of 15.0 g / 10 min (at 230 ° C and a load of 2.16 kg) and a filterability of 20 MPa / kg. These properties allow the addition of polypropylene fibers with a unit weight of 0.9 to 10 dtex. At a dosage of 7% by weight. of the concentrate into the fiber, modified polypropylene fibers with the character of natural fibers are produced separately when used as a contact layer in contact with the skin. The added value in Example No. 1 as well as in Example No. 2 is the natural character in the mass of dyed polypropylene fiber, which is particularly important in improving the quality of clothing, especially the bottom, in a wide range of consumer activities.

Example no. 3

From the polypropylene fibers produced according to Examples 1 and 2, it is possible to produce textile products by knitting technology, preferably with a 100% proportion of modified polypropylene fiber, as well as in a mixture with other natural or synthetic fibers. The preferred ratio is 10 to 90% by weight. for polypropylene fiber. In the final product, the polypropylene fiber may be on the front or back side.

Industrial applicability

The concentrates according to this technical solution are suitable for the modification of fine polypropylene fibers with a unit length weight of 0.9 to 10.0 dtex. The mass-dyed polypropylene fibers thus modified can be used in textile products. Modified polypropylene fibers can be used in the manufacture of underwear, socks and other textile products using knitting or weaving technology. The product can be made in 100% design. The products are specific in particular in that they have similar characteristics to natural materials, but are extremely environmentally friendly due to their production process. The undeniable benefit is the lightness of the products in comparison with products based on natural fibers or other synthetic fibers, or their mixtures.

Claims (3)

Concentrate for the preparation of modified polypropylene fiber with fine cellulose, characterized in that it contains a polypropylene carrier from 40 to 60% by weight, color pigments from 1 to 20% by weight, polyethylene wax from 5 to 15% by weight, amorphous silica from 0.5 to 1.5 wt. as a compatibilizer and cellulose from 1 to 20% by weight, the average particle size of which is from 6 to 12 micrometers. Use of concentrates according to claim 1 for the preparation of modified polypropylene fibers with fine cellulose dyed in a mass with a unit weight of from 0.9 to 10 dtex, preferably from 0.9 to 5.0 dtex for application in textile products, where the concentration of cellulose in the polypropylene fiber is from 0.8 to 2.0 wt. _χ Use of concentrates according to claim 1 for the production of final products containing 100% of modified fiber, or products in a mixture with other fibers, preferably 10 to 90% of modified fiber.