JPH0255542B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for sizing dyed or bleached warp threads.

Traditionally, when preparing warp yarns for dyed or bleached fabrics such as gingham or towels, hundreds of warp yarns are placed in a warping machine and a large number of small holes are passed through a hollow barrel, also known as a dyeing beam. The warped beams are wound up into a soft, thin layer under low tension for warping, and the warped beams are loaded one or several at a time into a beam dyeing machine, and treated with a treatment solution for scouring, bleaching, dyeing, or washing. The yarn layer of the beam is circulated from the inner circumferential surface to the outer circumferential surface or vice versa, and the warp yarns are dyed or bleached while being wound around the warping beam. Next, the warping beams are placed in a dehydrator one by one, and hot air is blown through from the inner circumferential surface to the outer circumferential surface of the yarn layer of the warping beam, drying the warp yarns moistened by dyeing or bleaching, and dehydrating the warp yarns. The required number of warp beams are installed in a sizing machine, and the warp threads of dyed yarn or bleached yarn unwound into sheets from each warp beam are sized, dried, and wound around the loom beam.

In addition, the dyed or bleached warp beams are placed in a sizing machine without being dried with hot air, and the wet warp threads unwound into sheets from each warp beam are pre-dried by passing them through a heating cylinder. A method of gluing, drying, and winding onto a loom beam was invented.

However, both of the above conventional methods require a large amount of thermal energy to dry the warp yarns moistened by dyeing or bleaching using hot air or a heating cylinder. In addition, in the former method, when the yarn layer of the warping beam is dried with hot air, drying spots occur in the yarn layer, the moisture content differs between the inner and outer circumferential sides of the yarn layer, and furthermore, the During drying, the yarn layers of each warping beam have different moisture contents due to differences in time and environment. In addition, in the latter method, when the yarn layer of the warping beam is naturally dried after dyeing or bleaching, differences in moisture content occur in each part of the yarn layer of each warping beam due to differences in time and environment. The difference in rate cannot be sufficiently resolved even by pre-drying with a heating cylinder. After all, in both methods, the moisture content of the warp yarns is not constant but varies during sizing of the warp yarns. Therefore, the difference in the moisture content of the warp yarns causes a difference in the amount of glue applied, making it impossible to apply the glue uniformly.

Therefore, recently, as disclosed in Japanese Patent Application Laid-open No. 144669/1983, dyed or bleached warped beams are loaded into a gluing machine without being dried with hot air, and each warped beam is separated into sheets. The sown wet warp threads are passed through a water squeezing roller and squeezed with water.The water squeezing lowers the water content of the warp threads and reduces the variation in water content.Then, the warp threads are glued, dried, and wound around a beam. Invented.

Compared to previous methods, this water squeezing method saves thermal energy and can almost uniformly size dyed or bleached warp yarns, but when sizing the warp yarns, the moisture content of the warp yarns is There are still large variations, and it is difficult to say that it is possible to uniformly glue dyed or bleached warp threads.

An object of the present invention is to solve the conventional problems as described above.

The present inventor has discovered that when dyed or bleached warp threads in a wet state unwound into a sheet form from a warping beam are passed through hot water and heated before being passed through a water squeezing roller to be squeezed with water, They discovered that the variation in moisture content of the warp yarns was further reduced.

That is, the present invention unwraps wet dyed or bleached warp yarns into sheets from a warping beam, heats them by passing them through hot water, squeezes them through squeezing rollers, glues and dries them, and winds them around the beam. This is a method of pasting dyed or bleached warp threads.

In the warp sizing method of the present invention, the wet dyed or bleached warp threads are heated by passing them through warm water before passing them through a squeezing roller and squeezing them. , compared to the conventional water squeezing method, the variation in the water content of the warp threads squeezed by the squeezing rollers is small.

Therefore, the variation in the moisture content of the warp threads squeezed by the squeezing roller before sizing is very small, so that the water content of the warp threads becomes uniform during sizing, and the sizing of the dyed or bleached warp threads is uniform. It will be held in

Furthermore, since the warp yarns are heated by passing through hot water before being sized, a decrease in temperature, that is, a decrease in concentration, of the sizing solution is prevented.

Next, examples of the present invention will be described.

In the sizing method of this example, first, several hundred warps for dyed and bleached fabrics are placed in a warping machine (not shown).
The warp threads are wound around a warp beam (also called a dyeing beam) to a soft, thin layer with low tension for warping, and then one or several of the warp beams are loaded into a beam dyeing machine (not shown), and the warp yarns wound around the warp beam are Dye or bleach. Next, the required number of warping beams are set in a wet state without being forced to dry, as shown in Figure 1.
It is installed on the beam stand 1 of the sizing machine, and the dyed or bleached wet warp y ₁ is unwound from each warping beam a into a sheet shape, and the wet warp y ₁ arranged in a sheet shape is first glued. The warp threads y 2 with reduced water content are heated by passing through the hot water device 6 of the sizing machine, and then squeezed at high pressure by passing through the high-pressure squeezing roller device ₂ of the sizing machine. Thread through and glue, glue thread y ₃
is dried by passing it through the drying cylinder device 4 of the pasting machine,
The sizing dry yarn y ₄ is wound onto the loom beam b attached to the winding section 5 of the sizing machine.

The specific operating conditions and warp moisture content are as follows.

Fabric: Gingham Warp: 65% ester and 35% cotton blend yarn 45th count Number of warps: 4920 Number of warping beams attached to the sizing machine: 12 Breakdown of warping beams:
8 bleached yarns 2 blue dyed yarns 1 black dyed yarn 1 brown dyed yarn Number of warp yarns wound on each warping beam: 410 warp yarns wound on each warping beam Dimensions: Width 1370mm Inner diameter 180mm Outside Diameter: 300mm Winding density of warp yarns onto each warping beam: 0.38Kg/cm Speed of ³ warps: 50m/min Hot water temperature of hot water device: 95℃ Squeezing pressure of high pressure squeezing roller device:
Temperature of the sizing liquid of the 4500Kg/153cm width sizing device: 90℃ Moisture content of the warp yarns unwound from the warping beam:
130±30% Moisture content of the warp passed through hot water and squeezed by a high-pressure roller: 62±7% Moisture content of the glued warp: 105% Moisture content of the dry finished warp: 5% As is clear from the above data In addition, the warp yarns that have passed through a hot water device and then been squeezed by a high-pressure roller have very small variations in moisture content, and are glued with a uniform moisture content, so that sizing can be done uniformly. Therefore, by the sizing method of this example, uniform and high-quality sizing warp yarns can be obtained, and in the loom in the next step, a gingham fabric with good weavability and the highest quality can be efficiently produced.

Furthermore, the warp threads heated through the hot water device are heated to approximately the same temperature as the size liquid of the sizing device and pass through the size liquid, so that a decrease in temperature, that is, a decrease in concentration of the size liquid is prevented.

Finally, a comparative experiment will be explained.

The sizing method of the comparative example is the conventional water squeezing method, and as shown in Fig. 2, the wet dyed or bleached warp yarn y ₁ unwound into a sheet form from each warping beam a is passed through a hot water device. Instead of passing through the filter, the material is passed through a high-pressure squeezing roller device 2 and squeezed under high pressure.

The other points are the same as in the embodiment, so the same reference numerals as in the embodiment are given in FIG. 2, and the explanation will be omitted.

In the sizing method of the comparative example, the moisture content of the warp threads squeezed by the high-pressure roller is 65±15%.

Therefore, in the sizing method of the example, the moisture content of the warp threads passed through hot water and squeezed by a high-pressure roller is 62±
7%, the variation in the water content of the warp threads squeezed by the high-pressure roller is small compared to the sizing method of the comparative example, that is, the conventional water squeezing method.

[Brief explanation of drawings]

FIG. 1 is a side view showing a gluing method according to an embodiment of the present invention. FIG. 2 is a side view showing a gluing method of a comparative example. y ₁ : dyed or bleached wet warp, a : warp beam, 2 : high pressure squeezing roller device, y ₂ : warp squeezed by high pressure roller, b: loom beam, 6: hot water device.

Claims (1)

[Claims] 1. The wet dyed or bleached warp unwound into a sheet form from a warping beam is passed through warm water to heat it, passed through a squeezing roller to squeeze it, dried with glue, and wound up on a beam. A method for pasting dyed or bleached warp threads, characterized by: