JPH02136688A - Pad dryer - Google Patents

Abstract

PURPOSE:To prevent the generation of migration and improve quality by a method wherein liquid-containing fabric, transferred in staggered manner, is dried by the group of catalyst combustion burners, projecting far infrared rays against the surface of the liquid-containing fabric, and the group of heat cylinders, arranged successively to the burners. CONSTITUTION:A fabric to be treated is dipped into a dyeing liquid tank 6 at first to impregnate predetermined dyeing liquid into the fabric 3, then, the liquid is squeezed properly by squeeze rolls 7 to the moisture regain of 60-65% and, thereafter, the combustion heat of the burners 4 is projected while guiding the fabric by guide rolls 2 whereby the heat treatment (drying) of the fabric may be effected. The surface temperature of radiation heat, radiated from the burners 4, is comparatively a low temperature such as about 400 deg.C and, further, the heat treatment is effected without contacting a heater with the fabric. The fabric 3, whose moisture is removed mostly by a multitude of burners 4 in such a manner, becomes dried condition substantially. Subsequently, the fabric 3 is contacted with heating cylinders 5, heated to about 120-150 deg.C, and is dried to a condition that the moisture regain thereof becomes about 4-5% by the heating effect of the heating cylinders 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a pad dryer used for drying textile products, particularly fabrics, which are continuously transported.

[Prior Art] In the conventional process of continuously, for example, pad dyeing a long length of industrially produced fabric, the pretreated fabric is passed through a padder filled with a predetermined dye solution to dye the fabric. The fabric is impregnated with a liquid, and then the fabric is pre-dried by passing it through an infrared dryer heated to about 800°C to vaporize the water adhering to the fabric surface.Then, the pre-dried fabric is Main drying of the fabric is carried out by supplying the fabric to a hot air dryer (dry heat air drying device) which blows dry hot air at 120 to 130°C. The thus dried dyed fabric is immersed in a steamer that retains heat in a moist heat IA to fix the dye, and then washed to complete the dyeing.

[Problems to be Solved by the Invention] However, in the conventional dyeing process described above, the main drying is performed using a dry heat air dryer called Hot Full. Migration marks tend to occur during processing, making it difficult to achieve high-quality level dyeing. In other words, in the conventional hot full, as mentioned earlier, dry hot air of 120 to 130°C is blown directly onto the fabric to which the dye has adhered, so the wind speed and other factors of this dry hot air , the dye attached to the fabric surface moves, resulting in migration and
It causes uneven dyeing, making it difficult to obtain high-quality dyed fabrics.In addition, conventional hot full dyeing has problems such as the large size of the equipment and loss of heat energy, making it uneconomical. was there.

[Means for Solving the Problems] The present invention has been made by focusing on such conventional problems, and its main purpose is to prevent the occurrence of migration and obtain a treated fabric of good quality. be. That is, in the present invention, drying treatment is carried out using a catalytic combustion burner without contact until migration becomes difficult to occur on the treated cloth, and then the cloth is guided to a heat cylinder to complete drying, thereby producing a product with good quality. An object of the present invention is to provide a pad dryer capable of obtaining treated cloth.

[Examples] The present invention will be described in detail below based on examples shown in the drawings.

Reference numeral 1 denotes a base frame of the pad dryer, and reference numeral 2 denotes a large number of guide rolls rotatably supported by the base frame 1. The guide rolls 2 cause the fabric 3 to be processed to be fed six times while meandering up and down. It is now possible to do so. Note that these guide rolls 2, especially the upper guide roll 2, are water-cooled rolls in order to prevent them from being abnormally heated by radiant heat from a burner, which will be described later. Reference numeral 4 denotes a catalytic combustion gas burner that is arranged to apply thermal energy in the form of far infrared rays to both the front and back sides of the fabric 3 that is meandered by the guide roll 2. This gas burner 4 was developed by, for example, Osaka Gas Engineering ■. A well-known catalytic combustion burner (hereinafter simply referred to as a burner) is applied. The burner 4 has a structure that irradiates far infrared rays only on one piece of the fabric 3, but the burner 4 located between the fabrics 3 on both sides has two burners 4 back to back and irradiates far infrared rays from both sides. It was configured so that it can be done. 5 is a heat cylinder arranged next to the burner group, and there are a large number of heat cylinders 5 (six in this embodiment).
are arranged in a plover pattern. 6 is a liquid tank for impregnating the fabric being fed with a treatment liquid (dye liquid, resin liquid, etc.), and 7 is a squeezing roll for adjusting the combined liquid amount of the fabric pulled out from the liquid tank 6. .

The structure of this embodiment has been described above, and its function will now be described with reference to a dyeing example. First, the fabric to be treated is immersed in the dye bath 6 to impregnate the fabric 3 with a predetermined dye solution. The mixed fabric is appropriately squeezed by a squeezing roll 7, where the moisture content becomes approximately 60 to 65*, and the fabric is irradiated with the combustion heat of the burner 4 while being guided by the guide roll 2, and the fabric is heat-treated ( drying) is done. The surface temperature of the radiant heat irradiated from this burner 4 is relatively low at approximately 400°C, and since the heat treatment is performed without contact with the heater, the heating effect on the fabric is mild and the fabric surface is heated. The dye is fixed uniformly and well, and migration does not occur.

In this way, the fabric 3 from which most of the moisture has been removed by passing through the burner group of a large number of burners 4 has a moisture content of about 18 to 20 zero at the time when the burner group is derived, and is in a substantially dry state. Become. The fabric 3 is then heated to about 120°C to 150°C.
The fabric 3 is brought into contact with a heating cylinder 5 which is heated to a temperature of 100.degree., and the fabric 3 is dried by the heating action of the heating cylinder 5 to a moisture content of about 4 to S96.

In this example, the fabric impregnated with the dye liquor was heated to a moisture content of about 18 to 20 using a catalytic combustion gas burner.
*The fabric is then brought into contact with a heat cylinder for final drying. That is, until the moisture content of the fabric is reduced, it can be dried using a catalytic combustion gas burner without contacting the heater and without applying hot air, so that migration can be effectively prevented. After the migration has stopped occurring, the fabric can be brought into contact with a heat cylinder to increase the drying speed, thereby increasing the processing efficiency.

[Effects of the Invention] As described above, the present invention includes a group of catalytic combustion burners that irradiate far infrared rays onto the surface of the combined liquid fabric that is transferred in a meandering manner, and a group of thermal cylinders that are arranged next to the group of catalytic combustion burners. Since this is a pad dryer that is a combination of a Because there is no such thing,
The heat distribution during drying is uniform, and a high-quality processed fabric can be obtained without migration. Further, the final drying of the fabric after passing through the catalytic combustion burner uses a relatively inexpensive cylinder dryer, which has the effect of increasing the economic efficiency of the pad dryer.

[Brief explanation of the drawing]

FIG. 1 is an overall explanatory view showing an embodiment of a pad dryer according to the present invention, and FIG. 2 is an enlarged view of the main parts thereof. 1... Base frame 3... Fabric 5... Heat cylinder 7... Squeezing roll 2... Guide roll 4... Catalytic combustion burner 6... Liquid tank 4 people →-

Claims (1)

[Claims] A pad dryer characterized in that it is a combination of a group of catalytic combustion burners that irradiate far infrared rays onto the surface of a combined liquid fabric that is transported in a meandering manner, and a group of thermal cylinders that are arranged next to the group of catalytic combustion burners.