JPH01201570A - Heat-setting of fibrous continuous form and heating apparatus therefor - Google Patents

Abstract

PURPOSE:To perform the title heat setting with small power output, by immersing a fibrous continuous form in a water bath to impregnate said form with water, while making said form travel continuously, followed by microwave treatment in a heating chamber and hot air drying before its leaving said chamber. CONSTITUTION:A fibrous continuous form is dipped into a water bath to impregnate said form with water while making said form travel continuously, and is introduced into a heating chamber where a partition wall transmissible for microwave but impermeable for water vapor has been installed between it and a microwave generator. Thence, the continuous form thus treated is subjected to hot air drying by blowing hot air through many holes provided on the sidewall of said chamber until said form leave the chamber, thus accomplishing the objective continuous heat setting.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for heat setting a long textile article, such as a rope, a belt, etc., and a heating device used therein.

(Prior Art) Textile products are generally heat-set after weaving and weaving. This heat setting is performed to stabilize textile products, to adjust their elongation, and to improve their tensile strength. For example, ropes are twisted when they are made into fR ropes, so if the ropes are only made, the ropes will be untwisted and the strands or yarns will come apart after steel making. Therefore, after steelmaking, heat setting is performed to fix the strain caused by twisting within the fibers and stabilize the product. In addition, after weaving the woven belts used for seat belts,
Heat setting is performed while applying tension.

This is done to adjust the elongation because it is not possible to obtain the elongation to absorb the desired energy just by weaving. In this case, tensile strength is also simultaneously improved by rearranging the arrangement of polymers within the fibers.

By the way, the most well-known method for heat setting is the heat setting method using steam. However, with this method, when the fibers are densely arranged and the diameter is large, such as rope, which is bulky in the thickness direction, heat cannot be sufficiently transmitted to the inside of the rope, making it impossible to set the heat uniformly. . In addition, this method is usually carried out in batches in a steam pot, making it impossible to process long products continuously.

Therefore, in recent years, a heat setting method using high frequency (frequency: about 13.56 MH2) has been used as a method for heat setting long textile products.

This method generates frictional heat by vibrating the polar molecules of the fiber material, or in the case of non-polar materials, by impregnating water between the materials and vibrating the water molecules,
It performs heating. Therefore, it is possible to heat the inside sufficiently and set the temperature uniformly. Also,
Even long items can be processed continuously. However, this heat setting method using high frequency
The efficiency was poor and the processing time was unexpectedly long. Also,
The equipment used in this method, especially the high-frequency generator, is large and expensive, which necessitates an increase in the size of the entire equipment and requires a large amount of equipment cost.

Therefore, the present inventor conducted heat setting using a microwave generator (used in an electronic wrench, whose frequency is approximately 2450 MHz), which has recently become available in a highly efficient, compact, and inexpensive manner. We considered methods. However, this microwave generator generally cannot withstand long-term use. This is because when water is heated, water vapor is generated, which can damage the microwave generator. Therefore, when heat setting textile products, if the material has no polarity, it must be impregnated with water, so this heat setting method using microwaves cannot be operated continuously for a long time.

(Problems to be Solved by the Invention) Therefore, the present invention provides a method for heat-setting a long textile product that can be operated continuously for a long time by using efficient microwaves, and also provides a method for heat-setting a long textile product that can be operated continuously for a long time. It is an object of the present invention to provide a heating device for the heat setting using a microwave generator, which is not damaged by water vapor even when heated.

(Means for Solving the Problems) Therefore, in the first aspect of the present invention, a long fiber object is continuously moved and immersed in a water tank to be impregnated with water, and then a microwave generator is used. The material is heated by introducing it into a heating chamber that has a partition wall between which microwaves can pass and which blocks water vapor, and when it is taken out from the heating chamber, it is dried by blowing hot air toward the heating chamber. It is characterized by: In addition, a second invention provides a partition wall that allows microwaves to pass through and blocks water vapor between the microwave generator and the heating chamber through which the long fiber object passes, and a partition wall that allows microwaves to pass through and blocks water vapor. It is characterized by having ventilation holes.

(Example) The present invention will be described below with reference to examples shown in the drawings. In FIG. 1, 1 is a heating device. A water tank 2 is provided in front of this heating device, and a feed roller 3 is provided in front of the water tank 2. Note that the water tank 2 is provided with a dipping roller 4. Further, a hot air blower 5 is provided behind the heating device 1, and a take-up roller 6 is further provided behind the hot air blower 5. The hot air blowing device 5 is configured to send hot air from a blower 7 to a tube 8, and the tube 8 is connected to the outlet of the heating device 1. Then, the rope A is sent from the sending-side take-up stand 9 to the water tank 2 via the sending roller 3, and is dipped in water in the water tank 2 by the dipping roller 4 to be impregnated with water. After that, it is fed into the heating device 1, passes through the tube 8 of the hot air blower 5 from the outlet of the heating device 1, reaches the take-up roller 6, and then the take-up side winding frame 1
It is designed to be wound up to 0. In addition, heating device 1
This will be explained in more detail with reference to FIG. 2. In the figure, numeral 11 is a microwave generator. In this embodiment, six microwave generators 11 with an output of IKW are arranged in parallel in the length direction together with the cold air Mlilf 12. A heating chamber 14 through which the rope A can pass is arranged below the microwave generator 11 with a partition 13 interposed therebetween. Furthermore, the interval l113
teeth.

A synthetic resin plate made of 47-fluorinated polyethylene, a quartz glass plate, or the like is used, which is heat resistant, allows microwaves to pass therethrough, and blocks water vapor. Further, the side wall of the heating chamber 14 is made of a punched steel plate 15 or the like so that a large number of ventilation holes are provided to prevent water vapor from becoming trapped inside the heating chamber 14. Furthermore, attenuation pipes 16 and 16' are provided at the front and rear of the heating chamber 14 to form entrances and exits for the rope A to prevent microwaves from leaking. Further, the entire heating chamber 14 and microwave generator 11 are covered with a safety shielding frame 17 to prevent microwave leakage. Note that there is a device pedestal 18 below the heating chamber 14 in the heating device 1, and the microwave generator 11
A power supply unit (not shown) is housed therein, and a meter 19, a switch 20, etc. are arranged on the surface.

(Function) In the heat setting method of the present invention, first, the material is immersed in water to be impregnated with water before being introduced into the heating device 1 that uses microwaves, so even if the material has no polarity, ,
Heat setting can be performed by vibrating the impregnated water and generating frictional heat. Furthermore, since microwaves are used for heating, heat setting can be performed efficiently, that is, in a short time. Furthermore, since the fibers are blown with hot air when they are taken out from the heating device 1, they are taken out in a dry state, and there is no fear that the fibers will shrink due to residual moisture. In addition, since the hot air is blown inward from the outlet of the heating chamber 14, the water vapor generated within the heating chamber 1.
It is pushed out through the ventilation holes on the side wall and does not get trapped inside. Moreover, the partition wall 13 prevents this water vapor from coming into direct contact with the microwave generator, so that the microwave generator can be operated continuously for a long time without being damaged.

(Effects) Hereinafter, a comparison experiment was conducted by actually heat setting a nylon dowel rope with a diameter of 12 mm using the heat setting method according to the present invention and the conventional heat setting method using high frequency waves.

The heat setting according to the present invention is performed by immersing the IKW microwave generator 11 in a water tank 2 and
The unit is operated to pass through the heating chamber 14 with a total length of 2 m, and the l
The test was carried out while blowing hot air by operating the 0KW blower 7. Then, we measured the processing speed of the rope, which is effective in heat setting. In addition, for comparison, the heat setting method using high frequency was carried out by immersing the rope in a water tank and then passing it through a heating chamber with a total length of 6 m using a high frequency generator with a total output of 15 KW. The speed was measured.

The effectiveness of heat setting is determined by whether or not the end of the rope is untwisted by more than ioam by hitting the end of the rope, and the strands and yarns come apart. went.

The results are shown in the table below.

As described above, the heat setting method according to the present invention can increase the processing speed of the rope despite the low output of the heating device, eliminate residual moisture, and eliminate shrinkage after setting.

Further, the heating device can also be made compact with a short heating chamber.

In the explanation of the present invention, a rope is used as an example of a long fiber object, but other long fiber objects, such as a woven belt used in the aforementioned seat belt, may also be used. Needless to say.

[Brief explanation of the drawing]

FIG. 1 is an overall view showing one embodiment of the present invention. Further, FIG. 2 is an explanatory diagram illustrating the heating device of the present invention in detail. 1...Heating device 2...Water tank 5...Hot air blower 11...Microwave generator

Claims (1)

[Scope of Claims] 1. After continuously moving a long fiber object and impregnating it with water by immersing it in a water tank, it is connected to a microwave generator through which microwaves can pass and water vapor is generated. A method for heat setting a long fiber article, which comprises introducing the article into a heating chamber provided with a partition wall to block the heat, heating it, and drying it by blowing hot air toward the heating chamber when the article is taken out from the heating chamber. . 2. A partition wall that allows microwaves to pass through and blocks water vapor is provided between the microwave generator and the heating chamber through which the long textile object passes, and a large number of ventilation holes are provided in the side wall of the heating chamber. A heating device used in a method for heat setting a long textile article.