WO2021137807A1

WO2021137807A1 - Modular bleaching machine that is to be used in bleaching of slivers

Info

Publication number: WO2021137807A1
Application number: PCT/TR2020/051289
Authority: WO
Inventors: Muhammed Ibrahim BAHTIYARI; Aysegul ERDEM; Huseyin BENLI
Original assignee: Kayseri Universitesi Rektorlugu; T C Erciyes Universitesi
Current assignee: Kayseri Universitesi Rektorlugu; T C Erciyes Universitesi
Priority date: 2019-12-30
Filing date: 2020-12-14
Publication date: 2021-07-08
Anticipated expiration: 2022-06-30

Abstract

The subject matter of the invention is related to a modular bleaching machine that enables bleaching of the slivers continuously with ozone gas during production in yarn mills.

Description

MODULAR BLEACHING MACHINE THAT IS TO BE USED IN BLEACHING OF

SLIVERS

Technical Field

The invention is related to a modular bleaching machine to be used for bleaching of slivers (the structure established by forming the fibers in a smooth and parallel way in the machine called the draw frame machine in the yarn production step).

Known State of the Art (Prior Art)

Bleaching processes are included in the pretreatment field in textile finishing processes, which enable to bleach fibres by removing the natural colours of the fibres using chemicals. Applications carried out for this purpose generally includes water and various chemicals, requires heat and said applications are carried out in finishing facilities.

Different studies and patents are available in literature that are related to the usage of ozone gas in textile finishing, however a modular bleaching machine that enables to continuously bleach slivers in yam production lines with ozone gas is not available in the prior art. For this reason, dependency to finishing facilities reveals itself at a high rate especially due to bleaching. Besides this, in the prior art, problems may arise during the pretreatment processes of yams and fabrics that are produced with blended fibres rather than a single type of fibre. In such a case it is possible for one or more of the fibres forming the blend to be damaged. For this reason, facilities encounter problems especially in the finishing of products that are formed of fibres that exhibit different chemical features. The reason for this is that, while one of the fibres that form the blend can be bleached with chemical extractions (processes) such as pretreatment, the other fibre can be damaged although it is subjected to the same conditions and the fibre properties and quality thereof may get worse. Brief Description of the Invention and its Aims

The present invention is related to a modular bleaching machine that enables to bleach slivers with ozone gas continously in yam production lines which eliminates all of the disadvantages, provides additional advantages and meets the above mentioned requirements.

The invention enables bleaching of slivers in yarn mills with modular bleaching machines without requiring a finishing department and devices

The machine developed by means of the invention, enables bleaching of yarn and roving formed textile materials in yarn mills.

By means of the invention, optionally, the production of cotton yam that is bleached in a yam mill is also enabled.

By means of the invention, it is possible to prevent the damaging of the fibre groups that form the yam by means of being able to separately bleach slivers that constitute the mixture in blended yam manufacturing and to reduce the risk of damage of said fibre groups during pretreatment processes.

With the invention the demands for different blended yarns received from the customers shall be able to be met easily through the invention. In other words, the invention enables oxidation bleaching of the suitable part of the fibre types that form the blend, without damaging the other fibre type in the blend. The main principle here is to pass the sliver formed fibres through the ozone machine and mixing it with other fibre groups in a draw frame machine.

By means of the modular bleaching machine of the invention, it is possible for bleaching the slivers continuously with ozone gas without using a water bath in yarn mills and thereby for reducing the dependency to finishing departments in yarn mills.

By means of the modular bleaching machine of the invention, it is possible to bleach continuously with ozone the slivers that are fed during production in a roving frame machine in yarn mills and to continuously adapt them to the roving frame machine.

The modular bleaching machine of the invention enables bleaching of slivers continuously with ozone gas.

The slivers to be fed to the draw frame machine and optionally the slivers that are received from the first draw frame machine and fed to the sliver buckets are enabled to be bleached with ozone gas using the modular ozone unit developed with the invention. Moreover, the invention enables to obtain blended yams where the disadvantages that arise from bleaching in a finishing department are eliminated by feeding only the selected slivers (if blending is to be made in the draw frame machine, the slivers formed from fibres that need to be bleached with oxidation agents, for example: cotton), into the draw frame machine after they are bleached.

Definition of the Figures of the Invention

Figure 1: Side view and technical aspects of the modular bleaching machine Figure 2: Top view and technical aspects of the modular bleaching machine Definitions of the parts/aspects/sections forming the invention

1. Humidity generator

2. Ozone generator

3. Textile material inlet

4. Textile material outlet 5. Feeding roller

6. Rotating roller

7. Ozone gas spraying unit

8. Vacuum unit

9. Hot air blowing unit 10. Carrier system drive motor

11. Waste ozone gas removal unit

12. Water tank

13. Air circulation propellers

14. Carrier system

Detailed Description of the Invention

The invention, a modular bleaching machine that enables continous bleaching of different formed textile materials in yarn production lines as shown in Figure 1 comprises; a humidity generator (1) that increases the efficacy of the ozone gas used for bleaching by humidifying textile materials, ozone generator (2) that produces ozone, textile material inlet (3) through which the textile materials enter the modular bleaching machine, a carrier system (14) that enables the movement of the textile materials inside the modular bleaching machine, carrier system drive motor (10) that drives the carrier system (14), ozone gas spraying unit (7) that enables the proper dispersion of the ozone gas, air circulation propellers (13) that homogenously distribute ozone and moisture in the medium, a vacuum unit (8) that suctions and removes ozone waste remaining on the textile material, and feeds the water tank (12) of the humidity generator (1), waste ozone gas removal unit (11) that breaks up by heating, the ozone in the air that has been suctioned from the medium and passed through the water tank, and a hot air blowing unit (9) where hot air is blown at the outlet, and a textile material outlet (4) where the ozonated slivers leave the machine.

The textile material that is to be bleached with the invention is preferably sliver. The textile material that is to be bleached can be a roving, yarn or carding/combing band.

The modular bleaching machine ozone generator (2) of the invention preferably comprises as a system, an built-in oxygen generator and a compressor.

The carrier system (14) of the modular bleaching machine of the invention may be a feeding roller (5) - rotating roller (6), a J-Box or conveyor belt systems.

The method developed within the scope of the invention and the modular sliver bleaching machine that operates according to this method, is based on bleaching of slivers that enter into the closed system and that are mobile, within the unit. The modular sliver bleaching machine, not only allows the continuous bleaching of a single sliver but it also allows continuous ozone bleaching of a plurality of slivers. Slivers are transferred from one machine to the other at different speeds at different stages in the yarn mill. The most suitable point of these flows is the point where the slivers are fed to the roving frame machine. The modular bleaching machine, can not only be used at the inlet of the roving frame machine such that it does not hinder production speed, but it can also be used optionally for separately bleaching the slivers before they enter into the draw frame machine. Namely this modular sliver ozonation machine can also be designed and used as an intermediate process in such a way that it provides transfer from the sliver bucket to the sliver bucket instead of the roving frame machine inlet, in other words instead of providing feeding by receiving from the sliver bucket and feeding to the roving frame machine following ozonation, it can provide feeding to another sliver bucket. Thereby the desired slivers are bleached without any restrictions in terms of the ozonation time required for ozonation, and optionally a double -pas sage ozonation process can be performed. In addition, it is possible to produce ozonated slivers that can enter the draw frame machine and so during blended yarn production to bleach the slivers consisting of fibres with different finishing properties separately, before the formation of yarn.

The bleaching method of the slivers by the modular bleaching machine of the invention comprises the following steps;

• Entrance of the slivers through the textile material inlet (3) to the modular bleaching machine,

• Bleaching the slivers with ozone gas obtained from the ozone generator (2),

• Delivering the ozonated water at 15-35°C to the medium after humidification, where said water is obtained by feeding of the ozone-mositure that has been suctioned from the medium via the vacuum unit (8) to the water tank (12) of the humidification generator (1), in order to increase bleaching efficiency during bleaching of slivers with ozone gas.

• Decomposition of ozone in a ozone gas removal unit (11) by heating, after the ozone suctioned from the medium during or after bleaching, is passed through the water tank (12) of the humidification generator (1),

• Determining the bleaching time, namely the waiting period in the modular ozone bleaching machine by passing speed of the slivers and by selecting the “rotary roller (6) - feeding roller (5)” between which said slivers shall be passed through and by adjusting the distance between each “rotary roller (6) - feeding roller (5)”,

• Moving the bleached slivers between the rotary roller (6) and the feeding roller (5) that are driven by the carrier system drive motor (10) through the modular bleaching machine,

• Suctioning the moisture and ozone on the slivers before they leave the machine via vacuum applied inside the vacuum unit (8),

• Drying the slivers before they leave the machine by means of the hot air, that is blown from the hot air blowing unit (9),

• Discharging of the slivers from the textile material outlet section (4).

In the modular bleaching machine used for bleaching slivers, developed with the invention, the slivers that preferably enter into the roving frame machine or again into the draw frame machine, enter into the modular bleaching machine through the sliver inlet (3) section. The slivers are humidified with ozonized moisture at 15-35°C that is received from the humidifying generator (1). At this moment, the moisture that is necessary in order for the ozone to be effective is targeted to be achieved without having to immerse the slivers into a water bath. The slivers that are ozonated with the modular ozone bleaching machine of the invention are passed through the vacuum unit (8) before exiting out of the system, and the ozone gas that is suctioned by the vacuum unit (8) is fed to the water tank (12) of the humidifying generator (1). As a result humidification is provided with ozonated water and thereby the bleaching efficiency is increased. The slivers that are available in the medium where humidification is provided with ozonated water also passes through the ozone gas spraying unit (7) located at different locations in the machine where ozone gas is blown. The ozone that is dispersed in the unit and the ozone gas that is directly sprayed is used to bleach slivers. Moreover the air circulation propellers (13) that are present in the system enable the moisture and the ozone in the medium to be homogenously distributed in the modular bleaching machine. The slivers that are planned to be bleached enter into the modular bleaching machine through the sliver inlet (3) and their movement inside the modular bleaching machine is provided by means of the rollers, which they pass between; where said rotary roller (6) and feeding rollers (5) are driven by the carrier system drive motor (10). As a result the bleached slivers are directly fed into the roving frame machine and thereby bleached roving and therefore yarns can be produced and as a result, the bleaching in the yarn mill can be provided without the requirement for a finishing department. Besides this, if a blended yam production is in question, the bleached slivers can be fed into the same draw frame machine with unbleached slivers obtained from different fibres and as a result a blended yam production can be carried out. By means of such a blended yarn production process it is enabled to overcome fibre damages that may arise from bleaching of the fibres in the blend to be bleached together in the same batch.

While the slivers move inside the unit in a continuous state, the duration time they are left in the system can be set, depending on the number of carrier rollers (feeding roller (5) - rotary roller (6)) they shall be passed through. In order to ensure that the slivers do not break during flow, the speed of the rollers and distance between the rollers (feeding roller (5) - rotary roller (6)) in the system can be optionally arranged. The slivers are dried before they leave the machine by means of the blowing hot air thereon, that is blown from the hot air blowing unit (9). At this moment, the ozone and moisture on the slivers are cleaned off in the vacuum unit (8) before leaving by means of the vacuum that is applied and it is enabled for the ozone that may leak from the machine during discharge to be suctioned. The suctioned air is passed through the water to be used for humidification and thereby ozonated water is established in the humidifying system, and the ozone is prevented from being distributed to the environment. Following this, the slivers that are discharged out of the outlet section (4) are passed through guides and are preferably fed to the roving frame machine or back to the draw frame machine.

Claims

1. A modular bleaching machine that enables to continuously bleach textile materials that are available in different forms in the yam production lines characterized by comprising;

• A humidity generator (1) that increases the efficiency of ozone gas that is used for bleaching, by humidifying the textile materials,

• Ozone generator (2) that provides the production of ozone gas,

• A textile material inlet (3) through which textile materials enter the modular bleaching machine,

• A carrier system (14) that enables the movement of the textile materials in the modular bleaching machine,

• Carrier system drive motor (10) that drives the carrier system (14),

• Ozone gas spraying unit (7) that enables homogenous distribution of the ozone gas,

• Air circulation propellers (13) that enable the ozone and moisture in the medium to be homogenously distributed,

• A vacuum unit (8) that removes the ozon waste remaining on the textile materials and feeds them to the water tank (12) of the humidity generator (1),

• Waste ozone gas removal unit (11) where the ozone in the air that is suctioned from the medium is passed through the water tank and is broken down after heating and then, is transferred to the medium,

• Hot air blowing unit (9) by which hot air is blown at the outlet,

• Textile material outlet (4) where the ozonated slivers exit out of the machine.

2. A modular bleaching machine according to claim 1, characterized in that said textile materials are slivers.

3. A modular bleaching machine according to claim 1, characterized in that said textile materials are rovings, yams or carding/combing bands.

4. A modular bleaching machine according to claim 1, characterized in that it can be adapted to the entrance section of the roving frame, draw frame or yarn spinning machines in yarn mills.

5. A modular bleaching machine according to claim 2, characterized in that the slivers can be transferred from one sliver bucket to the other after being bleached by ozone gas.

6. A modular bleaching machine according to claim 1, characterized in that it can perform double passage ozonation.

7. A modular bleaching machine according to claim 1, characterized in that the carrier system (14) can be a feeding roller (5) - rotating roller (6), a J-Box or conveyor belt systems.

8. A modular bleaching machine according to claim 2, characterized in that the carrier system (14) can be a feeding roller (5)- rotating roller (6), a J-Box or conveyor belt systems.

9. Bleaching method of the slivers by a modular bleaching machine according to claim 8, characterized in that it comprises the following steps;

• Bleaching the slivers with ozone gas obtained from the ozone generator (2),

• Discharging of the slivers from the textile material outlet section (4).