DE3428466A1 - SLEEVE AS WINDING CORE - Google Patents

Description

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The invention relates to a sleeve as a winding core for extremely thin, thread-like winding material, in particular with glass fibers a thickness of at least a few micrometers; with several mutually glued layers of helically wound strips, ■;> of which at least one is made of non-woven or synthetic Paper is made. In contrast to ordinary paper made from natural fibers, synthetic paper becomes an artificial one Paper understood exclusively from man-made fibers, the predominant part of which is in so-called plastic pa-

yj pier, which also contains natural fibers.

Winding cores for extremely thin ones emerging from nozzles Glass fibers are in the form of paper tubes with several mutually glued layers of helically wound webs known from so-called Kraft paper and almost exclusively in Use. These can be pulled onto a mandrel that can be rotated at a peripheral speed of up to 100 m / s, so-called Cuffs that collapse flat by folding them twice along the diametrical surface lines of the circular sleeve cylinder leave, after removing the fiberglass roll sitting on the rapier sleeve from the mandrel under Finger pressure across the plane determined by the fold lines on the center line of one sleeve half (between the two Fold lines) initially in kidney shape and then by bending the two sleeve folds together around the sleeve axis

2 ^r 5 parallel center line of the other sleeve half put together and out

removed from the inside of the winding, whereupon they can be tightened again on a winding mandrel after bending back and unfolding.

The flexibility shown in this flexibility and flexibility of cores made of "Kraft paper is beneficial through the

J ¹ J heat resistance and the external embossability of such paper, which makes it possible to provide the outer layer of the sleeve with adhesive marks, which prevent the glass fiber roll mixed with size (softening agent) from slipping axially from its winding core.

But 'advantages mentioned> \ The shells of kraft paper as' represents a number of disadvantages compared to GlaÄifaserwickelkernen which was reported regarding fulfillment of the conditions under which produces glass fibers, and wound

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as well as dried irocknurig-

/ warden. These include the high / temperature of the glass fibers and the the air surrounding the mandrel and the impregnation with size that is applied to the glass fibers. Inadequate but not only that on cores made of Kraft paper Wet strength, but also tear strength at the edge of the sleeve, the diameter of which is e.g. 25 cm and the speed of which is then for example 200 / s, with it the glass fibers between the spinneret and the mandrel are stretched to their desired thickness of a few micrometers.

The disadvantages mentioned entail that as glass fiber wound cores Inserted sleeves made of Kraft paper can only be reused a few times and are therefore relatively brittle low unit price require a considerable expense. The invention is therefore based on the object of a sleeve as a winding core for extremely thin, thread-like winding material such as glass fibers, which has the advantages of the sleeve from Kraft paper preserved and at the same time the mentioned Avoids disadvantages of such a sleeve, i.e. easily foldable and bendable, externally stampable, heat-yes heat-resistant, wet and is tear-resistant and can be reused at least as often until the sleeve has been cleaned on its outside because of the contamination would be fed through the plain.

This object is achieved according to the invention in a sleeve of the type mentioned in that only webs of nonwoven and / or of synthetic paper and / or of plastic paper and / or of nonwoven are present, the fibers of which are at least predominantly chemical fibers and a synthetic binder .
It is from DE-PS 31 Ü-5 828 a paper tube ^ as a winding

.i0 core known for extremely thin web-shaped winding material, which aas numerous mutually glued layers of helically wound Paper or cardboard webs and two "synthetic paper webs" are made, which are in at least one layer at bumpless Overlap their longitudinal edges the outer peripheral surface

J ¹ S b '". W. In at least one layer the inner circumferential surface of the paper

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Form a sleeve · However, this is fleece-free and does not have any Layer made from a sheet of plastic paper, but only sheets made of kraft paper or synthetic paper with a proportion of cellulose fibers of 65 percent by weight.

^c> In a preferred Aasführungsform of the sleeve according to the invention the inner layers are made of the same material and the outer layer optionally of another material, so that Schrumpfungsproblerne are minimized.

In the preferred embodiment, the outer layer is

'° provided with adhesive marks, the lengthways, the course of the.

outer layer forming web are arranged in the following lines. These adhesive stamps can be, for example, such that as the embodiment of a miitels on _{environmental:} having caught hole-like recesses knurled wheel manufacturer

"* ·" ■ 'were placed.

As an embodiment of the sleeve according to the invention is a ■ Model of the preferred embodiment with all claimed

_f features attached.

Wi ₁ ? can be seen on it, follows a total of four identical inner ones

-OK or middle layers of non-woven fabric, the web edges of which do not overlap butt against each other, one that is firmer because of the shape of the external knobs and because of the seamless overlap the edges of the web have a thinner layer of other non-woven material, as this is mainly the one that is subjected to physical and chemical stress. It is therefore a sleeve that, apart from the synthetic adhesive used to join the layers, is exclusively consists of nonwovens containing fibers made of aramid, polyester, polyamide and cellulose and used as a thermal binder crosslinkable aqueous dispersions of copolymers

- '·' - 'Acrvlatbasis may contain. In the manufacture of nonwovens Fibers from 1.5 to 3.5 dtex are used.

Includes a sleeve according to the invention plastic paper, then this thinner from a mixture of pulp fibers with polyamide should .1 fibers and a binding agent from the class of acrylic acid ester • - * '- is ¹ copolymers.

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Claims (3)

Expectations . 1.> Sleeve as a winding core for extremely thin thread-like Winding material, in particular glass fibers with a thickness of ^ at least a few micrometers; with several mutually glued Layers of helically wound webs, at least one of which consists of synthetic paper or nonwoven fabric, thereby 2ejc indicates that only webs made of nonwoven fabric and / or made of synthetic paper and / or made of plastic paper and / or made of nonwoven fabric, which are attached to fibers have at least predominantly man-made fibers and a synthetic binder. "'■■' ■ ■ 2.) Sleeve according to claim 1, characterized in that the inner layers are made of the same material and the outer layer may be made of a different material. 3.) Sleeve according to claim 1 or 2,? Characterized in, that the outer layer is provided with adhesive marks along the lines following the course of the path forming the outer layer are arranged. Parking garage at the building: entrance at the corner of Tuttlinger Straße Bank code 600 90 100, account no. 4 553 950, Stuttgart Bank Oral information and orders require written confirmation EPO COPY