FR2518597A1 - Perforated polyolefin film sachets for holding skeins of yarns - for display and enclosure during dyeing and storage - Google Patents

Abstract

Dyed textile fibres are enclosed as loops or skeins of material in pockets of perforated flexible plastic film, both for protection during the final stages of dyeing and for packaging. Pref. the flexible film has a thickness of 5-100, pref. 10-30 microns and perforations of 0.1-10, pref. 1.2-5 mm. across their own largest dimension. Pref. the film includes 20-200, pref. 30-150 perforations/inch2. Applicable to plain or fancy, textured yarns, to eliminate successive return transfer to working bobbins on storage bobbins. Allows dye solns. good access to all parts of the filament surface.

Description

 The present application relates to a presentation of textile threads and its method of manufacture.

 It is known that the textile yarns are dyed either in the form of dentroulements or in the form of skeins. In the form of windings, the thread wound without tension on a support is wrapped by a permeable textile sleeve such as knit or fabric 19-che, support then threaded on a perforated tube through which passes the dye bath which circulates and freely in the soft groove; the sleeve is intended to prevent the soft coils from rolling up and the wires overlap with those of other neighboring windings. After dyeing, the sleeves are removed and the dyed yarns are wound under tension to give Hard reels for subsequent processing of yarns such as weaving or knitting For storage and shipping of these reels, they are generally re-wrapped to preserve them during transport and handling storage. which would cause the collapse of the windings or other deteriorations such as soiling for example.

 In the case of dyeing in skeins, the latter, after dyeing, are generally put into the form of hard coils stored and rolled up as indicated above. These operations are therefore long and expensive, moreover, the manipulations of son are not without risk of breakage or dirt.

In French Patent No. 1,198,170, it is proposed to store continuous yarns at the outlet of a stuffer crimper in which the strands are kept parallel to one another in a permeable ribbon such as an open-knit fabric. obtained tubular product that can be wound on perforated tubes for fixing the crimping or dyeing of the yarn, after
processing the wire is extracted from the tube, and wound on a coil to give rise to a winding of the usual type. So the opé
rat ion flexible tube of textured continuous filaments replacing
this putting in the form of soft windings as practiced here
above, the process-has the same disadvantages as pre
cédemment.

In the French patent of addition No. 76.17904 la-deman
deresse, published under the number 2 354 407, concerning the manufacture of hairy textile elements consisting of an assembly of textile strands organized in a bundle, according to which textile structures which are surrounded by an envelope are assembled in parallel; flexible plastic, it is proposed to dye under the envelope, then perforated, the longitudinal structures in the form of casings, these structures then being, after dyeing, cut into textile elements of specified lengths for the realization of hair articles such as floor or wall coverings, the perforated envelopes then being removed after completion of these articles.

 The present application proposes to avoid the disadvantages presented by the prior art dyeing of yarn coils or skeins.

This application relates to a presentation of textile threads
dyed: characterized in that the dyed textile yarns
windings or skeins are wrapped with a perforated flexible plastic film serving both for protection during dyeing and final packaging of the dyed textile.

The present application also relates to a manufacturing process
of the new presentation of dyed textile yarns characterized
in that the textile threads are wrapped with a perforated film
in the form of conventional windings or skeins, which are
then the maintenance of the envelope by heat treatment, then
that is dyed by the usual processes the product in the envelope.

 The perforated envelope is generally made of a flexible plastic film such as polyester, polypropylene> polyvinyl chloride for example. The perforations are generally of between 0.1 and 10 μm, of larger transverse dimension; they will preferably be round, with a diameter of between 0.2 and 5 mu; the distribution of the perforations compatible with a good circulation of the dyebath and the necessary stability of the envelope textile during subsequent manipulations is generally between 20 and 200 perforations per square inch (1 square inch = 6.35 cm 2) and preferably between The thickness of the plastic film which must be sufficiently strong and flexible is generally between 5 and 100 microns, preferably between 10 and 30 microns. The film may be heat-shrinkable or not heat-sealable or simply heat-bondable or not, such films are commonly used in packaging and packaging operations.

 The textile is preferably in the form of spun yarns or continuous yarns, it will be referred to as yarn in the present application, it is packaged in conventional windings or skeins. The nature of the textile is indifferent: natural, artificial or synthetic, used alone or mixed. The textile can be flat, curled, textured, in the form of filttonetu, spun yarn, fancy yarn. This process avoids taking the textile after dyeing, so it is economical.

 Filming as described in the present application offers many advantages such as textile protection in handling, transport ..., etc., before dyeing. One will then avoid a direct soiling of the superficial turns, their hanging, their scraping, landslide ...., etc ... It is indeed common to collect in a first step the materials in presentations not too fragile tight winding. If these presentations allow easy handling and shipments, they are not always adapted to the dyeing process if it is to dye son, spun ... and a first recovery is here often practiced, the opposite of the one implemented. After putting it into the dyeing process, placing under the protection of the textile during dyeing also ensures protection. In fact, in order to have good dyeing results, it is often necessary to use not too tight, not too hard windings, allowing the dyebath to circulate in the interior of the material. risk is to provoke on the periphery of the landslides of turns and, then, in the subsequent implementation, it is common to have to "peel" the support (cone, tube) to eliminate the whole of the surface layer having a bad windability or doubtful; this causes material losses of up to 1 to 2% and therefore requires an additional operation; It should be noted that the losses are all the more prejudicial as they affect high value-added materials. film dyeing avoids these surface defects, it is no longer necessary to precede the implementation of a "peeling".

 Film dyeing allows for other important gains. In fact, the dyeing requires fragile soft coils For delivery to the textile processing industry, these dyeing presentations do not support handling and transport, so it is common practice to carry out a recovery operation after dyeing to deliver supports. with "hard" windings.

 Film dyeing allows delivery of media with sufficient locking of the turns, and effective protection of the material, the recovery operations, always expensive and a source of risk of deterioration due to handling of the son, are removed.

 The elimination of intermediate steps in textile processing is intensively sought, for example in the provision of dyed textured yarns, fancy yarns, etc.

Perforated film dyeing is therefore an essential operation to safely allow this optimization of the circuits, this will be all the more interesting as the materials made of yarn are often very fragile: textured yarns, fancy yarns, etc.

etc., and that their risks of deterioration are numerous by the previous processes: hooking, dirt, muddy external contact of the wires n
This dye under individual plastic presentation makes it possible to market the product in this form of packaging, which can optionally be printed with the manufacturer's mark, the textile therefore does not undergo any contact with the outside between the moment when it is put in a plastic envelope before dyeing. and its use at the transformer or its provision to the consumer (in the case of balls of knitting yarn or embroidery for example).

 The following examples illustrate the present application without limiting it.

Example 1
A wavy fancy yarn made of 72% of acetate thread and 28% of polyhexamethylene adipamide yarn, overall weight: 250 dtex, is wound on a tube, inner diameter 56 μm, length 230 μm.

This support is wrapped in shrinkable, heat-sealable perforated polypropylene film having the following characteristics:
- thickness:: 18 microns 2
- round holes: diameter 0> 8 mm - 85 holes / inch The support thus wrapped is subjected to a retraction under hot air (temperature 115'C). The dyeing is then carried out according to a usual method, the support in the envelope is uniformly dyed, the quality of the winding of the surface turns is subject to manual and visual checks, there are no landslides or straddling son. To check the qualities of unwinding of the dyed thread1 it is unrolled at high speed: no breakage is achieved.The film support is then removed from the latter and mounted directly on loom, the yarn is then knitted without problems.

Example 2
A yarn of global title: 1440 dtex consisting of 61% of acrylic fibers, 16% of wool and 23% of continuous polyhexamethylene adipamide yarns, is wound on a support, 65 of these supports of 600 g each mounted on a rigid plastic cone are wrapped in heat-sealable polypropylene film, the film supports are then treated with hot air at 11 ° C. which heat-shrinks the film, having the following characteristics; - Thickness: 13 microns 2 - Circular perforations: 1.5 mm in diameter - 85 holes / inch
The supports are then dyed in an autoclave with a capacity of 800 liters, with a circulation capacity of 35 liters / kg / minute, by the following procedure: Addition of the ancillary products: 1 cc / l of acetic acid
0.5 cc / l of UNIVEDIRE (CIBA-GEIGY)
Stirring 15 minutes at 400C.

- Addition of colorants
0.0486 kg of SEVRON ERO blue (Basic CI 77)
0.142 kg of yellow ASTRAZON GIL (CI Orange 29)
0.018 kg of LATYL B. FSW red (CI Disperse Violet 17) - Temperature rise in 50 minutes at 1000C, then stay 20 minutes
at 1000C.

- Cooling in 15 minutes at 700C.

- Cold rinsing: 10 minutes.

- Finishing 20 minutes at 400C by
0.5 cc / l of acetic acid
2 cc / l of SAPAMINE OC cationic softener, yendu donations
trade under this brand by GIBA-GEIGY.

- Drying in a tunnel oven at a temperature of 800C.

 This material is used in circular knitting. The results are excellent, especially with a normal start of knitting. The knit obtained also has no appearance defect due to unevenness of dyeing.

Example 3
An acetate-nylon looped loop yarn 66 of 230-dtex overall titre is floated and then wrapped in a thermoplastic film having the following characteristics. non-retractable, 25 micron thick, 85 round perforations per square inch in diameter 0.8 mm.

 your tincture in autoclave is good. The subsequent reeling is excellent. The protection provided by the envelope is effective.

Example 4

 A continuous yarn of polyethylene terephthalate of title 167 dtex, half-dull strands, textured FTF, undistorted presentation, is wound on a perforated plastic tube, rigid, with a density of 0.39.

 the 2 kg carriers each are shrink-wrapped with the following characteristics: thickness: 18 microns, circular perforations: 1.5 mu in diameter - 85 holes per square inch.

 Heat shrink is performed on an automatic packing machine with hot air tunnel shrink at 1050C.

 Under this presentation, 254 carriers, are 508 kilos, are dyed autoclave of 4,500 liters, under the following cycle, with a circulation of 60 liters / kg / minute.

- Start at 80-C, addition of ancillary products
1.8 kg of EULYSlNE-S acidifier (mixture of organic acid), sold under the brand name by BASF

 2,545 kg of carrier REMOL-LS (mixture of organic acid), sold in the trade under this brand by HOECHST.

 Stirred 10 minutes at 80 ° C.

- We add the dyes
Blue RESOL-INE FBL 11,830 kg (CI Disperse Blue 36)
Purple FORON S 3RL: 0.252 kg (CI Dispersa Violet 63)
The mixture is stirred for 10 minutes at 80 ° C.

 We go up to 1300C in 50 minutes then we stay at 1300C for 25 minutes.

 It is cooled in 12 minutes at 900 ° C., and the autoclave is emptied.

It is then filled to 850C for a stripping bath with: soda: 5.3 kg
sodium hydrosulfite: 6 kg
It is rotated 17 minutes at 85 ° C., drained and rinsed for 10 minutes at 800 ° C. with hot water, then 10 minutes with cold water at 20 ° C.

 After spinning on a centrifuge, dry a hoe at 950C.

 The results of this dyeing in industrial thread are extel- lent on all the controlled factors: unison, reproducibility of the color, solidities dyeing ... One does not detect difference of results in dyeing compared to those obtained by the conventional textiles.

 It is further noted that there is no collapse of the surface turns.

Example 5
A fancy yarn of global title 500 dtex of loop type consisting of continuous threads
84 7. of triacetate
16% of golyhexamethylene adipamide yarn is wound on a shrinkable plastic tube; at a rate of 1.55 kg of textile per support. It is packaged in 25 micron heat-shrinkable heat-shrinkable polypropylene or extruded film with 65 perforations per square inch of diameter 2 mm.

The industrial autoclave 330 of these supports is dyed, ie 511.5 kg, according to a conventional cycle. Starting at 50 ° C. Addition of 1 μl of acetic acid
liters of EDUNINE BONE as a unifying agent (softener;
brand) of PCLTK - Stir 7 minutes.

- Addition of colorants
5.670 kg Scarlet FORON SB WFL (CI Disperse Red 74)
1,190 kg of red LATYL MG (CI Disperse Red 65)
0.263 kg red DIM & IDE FRJ (CI Acid Red 89)
Stirred 7 minutes, then heated to 110 C in 60 minutes - stirred for 30 minutes at 110 C before cooling in 20 minutes at 70-C.

A first rinse is carried out for 10 minutes at 70 ° C:
Then the temperature is lowered to 300C for 15 minutes with the addition of
0.9 kg of acetic acid
2.2 kg of SOFTAMINA-K (cationic softener) sold commercially under this brand by SODIA CHEMISTRY.

 The dyeing results are excellent.

 The substrates under films are thus delivered directly to the transformer for weaving or knitting.

Claims (7)

- - Presentation of dyed textile son characterized in that the textile yarn dyed in the form of windings or are wrapped with a perforated flexible plastic film for both protection during dyeing and final packaging dyed yarn.  2 / - Presentation son-te = .tiles dyed according to claim 1 characterized in that the dyed yarns are spun yarns.  3f - Presentation of dyed textile yarns according to claim 1 characterized in that the dyed yarns are continuous yarns.  4 / - Presentation of dyed textile yarns according to claim 1 characterized in that the dyed yarns are fancy yarns.  5 / - Presentation dyed textile son according to claim 1 characterized in that the dyed son are textured son.  6 / - Presentation dyed textile son according to claim 1 carctérisée in that the perforated flexible plastic film has a thickness of between 5 and 100 microns preferably between 10 and 30 microns, and that the perforations have a size between o , l and 10 friend in the largest transverse dimension.  7 / - Presentation of dyed textile yarns according to claim 6, characterized in that the perforations are of round section of diameter between 0.2 and 5 xtrni.  8 / - Presentation dyed textile son according to claim 1 characterized in that the distribution of perforations on the film is between 20 and 200 perforations per square inch preferably between 30 and 150 perforations.  9 / - A process for producing the presentation of dyed textile yarns according to claim 1 characterized in that is wrapped with a perforated film textile son in the form of conventional coils or skeins, that the The casing is then maintained by heat treatment and then the product under the envelope is dyed by the usual methods.