DE2011309A1 - Composite yarn - Google Patents

Description

DA-3471

B β schreibu η r to the patent application

of the company

COURTAÜLDS LIMITED 18 Hanover Square London W.1 / England

concerning

Priority: March 11, 1969, Great Britain, No. 12625/69

The invention relates to novel textile yarns and to fabrics made from these yarns. A An important object of this invention is a novel type of yarn with improved flame resistance, from which woven and knitted or knitted fabrics are obtained that are both flame-resistant and dimensionally stable.

There are already known composite yarns in which a core yarn, for example a yarn of the spandex type (USA «PS 3

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or a conventional continuous filament yarn, such as polyester yarn « with an edge! In the form of a fiber roving, for example made of viscose rayon staple fiber or cotton, provided leb. The invention relates to novel yarns of this known type.

The invention relates to a composite yarn consisting of a core made of endless filaments and a sheath made of one Textile fiber roving and is characterized by that the core is made of glass fibers and the roving is made of fibers lammproof big estates.

For the purposes of the invention, a fiber is designated as flame-resistant ₉ if a knitted antler or knitted fabric consisting exclusively of the fiber meets the requirements of Condition 3 of British Standard 3120/1959 under the test conditions of British Standard 3119/1959, or if it does the test according to the AATCC test method 33-1962 is divided into class 1 (a) according to § 9.1.1.

A fiber with inherent, structural properties can be used as a flame-retardant fiber Flama resistance can be used, for example modified aory fibers, such as fiber based on copolymers of acrylonitrile and vinylidene chloride and / or vinyl chloride. Examples of these fibers are fibers based on acetone « soluble copolymers containing about 44 to 55 parts by weight of acrylic

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nitrile and about 55 to 45 parts by weight vinylidene chloride contain barren fibers that are about 55 to 75 parts by weight Acrylonitrile and about 45 to 25 parts by weight vinyl chloride. On the other hand, the fiber can also be an ordinary one Textile fiber, such as a viscose rayon fiber or cellulose acetate fiber, which contains a flame retardant, such as trichloroethyl phosphate or a tris (dibromopropyl) phosphate, for example tris (2,3-dibromopropyl) phosphate. Examples of such fibers are given in German Patent 1,187,344 and British Patent 1 158 231.

The glass filament core can be a yarn consisting of a Consists of bundles of substantially parallel endless glass filaments. The core preferably consists of a bundle of single threads that have been textured, which can be done, for example, by passing through an air jet, as in German Patent 1,061,953 is described. The use of a core made of textured glass filaments improves the cohesion between the core and the roving. Have the glass fibers in the composite yarn preferably a low single filament denier of less than 1 denier when other glass fibers are used can be. Commercially available beta glass fibers of 1/4 denier can be used as glass fibers.

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The composite yarns produced using flaramfeaten Faaarrovinge according to the invention are particularly suitable for the production of dimensionally stable fabrics which are used for the manufacture of non-flammable garments, for example overalls, garments for fire-fighting and safety clothing for foundry workers, welders, chemical and refinery workers, workers in the explosives industry , Racing drivers and for flight technology personnel. Ensures the specific combination of core and cladding in the inventive yarn _t that the substance also has a very good fire protection, protection against thermal radiation and against molten metal and to chemicals while simultaneously shows good textile properties with regard to the case and the suppleness. When exposed to fire, none of the components ignite and the glass core does not shrink from exposure to the flame. The glass ψ nuclear therefore always forms a protective, non-flammable skeleton. The presence of a textile jacket on the core has the advantage that the glass is protected against abrasion and gives the fabric maturity, coverage and other aesthetic properties, such as a pleasant feel, which a fabric consisting solely of glass filaments would not have. This also enables the core yarn and fabrics made from it to be easily dyed in any shade. The fabrics are also easy to wash and

dry cleaning.

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The invention is illustrated in Example 1 by the following examples.

An endless beta-glass filament yarn from 300 denier (titer of the single threads 1/4 denier) is used, according to that described in German Patent 1,061,953 Method had been textured in an air jet.

The Mante! Roving consisted of 2 parts with 2 strands (2 ends of 2 hank) a staple fiber of 2 denier and 6 cm made from a copolymer of approximately equal parts by weight of acrylonitrile and vinylidene chloride.

The coat roving was spun on a ring spinning machine, while the glass core on the front rollers of the Verstreekensystems was introduced. The composite yarn was twisted with a yarn with a final yarn count of 1/10 cotton count was achieved®.

The resulting composite yarn was laid on the warp and weft threads and joined to smooth fabrics and headstocks with around 17 threads per centimeter and 12 weft threads per centimeter? w © bt. ¥ © ausgesetsst in Dissa material © FlaaaabehaEMllisBg a va & ° to, -blieb the G © Rüst the fabric ©© completely © rhaLtaa w ä 4i

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Flame did not penetrate the fabric. Even when dripping on of molten metal on the fabric, the molten metal did not penetrate through the fabric. The fabric also showed very good wash resistance,

Example 2

Ee a smooth woven fabric was produced, the chain of which is made of a composite yarn of 2/10 cotton count with a »core of P texturized heta ~ glass fiber old 300 denier and a sheath roving» as described in Example 1. the Weft threads used were obtained in the catfish described in Example 1 and had a cotton number of 1/10 A fabric with 17 threads per centimeter and 16 weft threads per centimeter was obtained.

The fabric produced in this way was successfully used for non-flammable overalls for racing drivers.

Example 3

In this example, a fabric la of the catfish described in Example 2 was produced; However au was no double chain üörnierη a simple frit with animal Rauawollnuwuer 1/10 as Kefcfca verwind! "; · 0s so hergtatellte material was more flexible and easier ale Deuteronomistic material gßüiäi) Example 2 and zeigt® fthalloh" flatsmfest® üigenschaf ton.

Patent claims

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Claims (5)

Patent to a ρ r ti ehe 1. Composite yarn »consisting of a core of endless Filaments and a dumbbell from a textile fiber roving, characterized in that the core consists of Glass fibers and the roving made of fibers with flame-retardant properties consists. 2. composite yarn according to claim L _9, characterized in that the grain consists of textured glass fibers .. 3. composite yarn according to claim 1 or 2, characterized in that g e k e η η, that the roving consists of modified acrylic fibers with inherent flame resistance. 4. composite yarn according to claim 3r characterized in »that as modified acrylic fibers copolymers' of acrylonitrile with vinylidene chloride and / or vinyl chloride. 5. Use of composite yarns according to claim 1 to 4 for Manufacture of flame retardant clothing. 009851/2051