JP2008045236A - Method for producing recycle polyester nonwoven fabric and apparatus for producing recycle polyester nonwoven fabric - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a recycled polyester nonwoven fabric, with which a process for preliminarily separating and recovering a filament component is omitted, cut end materials are sufficiently loosened and stands reuse and an apparatus for producing a recycled polyester nonwoven fabric. <P>SOLUTION: In the method for producing a recycled polyester nonwoven fabric for reproducing the end material of a polyester nonwoven fabric, the method includes a first process for roughly cutting the end material, a second process for opening the cut end material and forming a regenerated raw material, a third process for mixing the regenerated raw material with a polyester-based binder fiber to from a mixed raw material, a fourth process for molding the mixed raw material, and a fifth process for heating and hardening the formed mixed raw material. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a manufacturing method and a manufacturing apparatus for manufacturing a recycled polyester non-woven fabric by using an end material of a polyester non-woven fabric as a raw material again.

  There is known a method for producing a recycled polyester nonwoven fabric in which the end material of the polyester nonwoven fabric is cut, the long fiber component having an average fiber length of a predetermined length or more is separated and recovered, and the end material is regenerated (Patent Document 1).

JP 2004-143620 A

  In the conventional method for producing a recycled polyester nonwoven fabric, it is necessary to mix long fiber components having an average fiber length of a predetermined length or more in order to give the recycled nonwoven fabric sufficient strength. For this reason, the process of fractionating and collecting the long fiber component in advance in the trimmed end material of the polyester nonwoven fabric was indispensable.

  In addition, since the size of the cut end material varies, there is a possibility that the cut end material may not be sufficiently unraveled by the spreader, and there is a problem that it is difficult to recycle.

  Therefore, the present invention can omit the step of separating and collecting the long fiber component in advance, and can sufficiently unravel the cut end material, and can produce a recycled polyester nonwoven fabric that can sufficiently withstand reuse, and a recycled polyester nonwoven fabric. An object of the present invention is to provide a manufacturing method and a manufacturing apparatus.

  The method for producing a recycled polyester nonwoven fabric according to the present invention includes a first step of roughly cutting the end material in the method for manufacturing a recycled polyester nonwoven fabric for reclaiming the end material of the polyester nonwoven fabric, and opening the cut end material. A second step of producing a recycled raw material by fibering, a third step of mixing the recycled raw material and a polyester binder fiber to produce a mixed raw material, a fourth step of molding the mixed raw material, The above-mentioned problem is solved by providing a fifth step of heating and solidifying the molded mixed raw material (Claim 1).

  According to the present invention, since the recycled raw material obtained by opening the end material and the polyester binder fiber are mixed, the polyesters can be firmly bonded to each other. Therefore, a recycled polyester nonwoven fabric having sufficient strength can be produced without mixing long fibers. For this reason, the process of separating and collecting the long fiber component in advance can be omitted.

  Moreover, in the manufacturing method of the recycle polyester nonwoven fabric of this invention, it is preferable to open with a several opening machine in a said 2nd process (Claim 2).

  In this case, by sequentially opening with a plurality of spreaders, the end material can be sufficiently opened compared to opening with a single spreader. Therefore, a recycled polyester nonwoven fabric with less unevenness and lump can be produced.

  The recycled polyester nonwoven fabric manufacturing apparatus of the present invention is a recycled polyester nonwoven fabric manufacturing apparatus that recycles the end material of the polyester nonwoven fabric product while transporting the end material along the transport device, and the cutting means for roughly cutting the end material, Recycled raw material generating means for generating a recycled raw material by opening the mill ends, mixed raw material generating means for mixing the recycled raw material and polyester binder fibers to generate a mixed raw material, and forming means for molding the mixed raw material And the heating means for heating the molded mixed raw material to solve the above-described problem (claim 3).

  According to this invention, since the mixed raw material production | generation means to mix the reproduction | regeneration raw material which opened the end material, and the polyester-type binder fiber is provided, polyester can be couple | bonded firmly. Therefore, a recycled polyester nonwoven fabric having sufficient strength can be produced without mixing long fibers. For this reason, the means for separating and collecting the long fiber component in advance can be omitted, and the nonwoven fabric production line can be simplified.

  In the recycled polyester nonwoven fabric manufacturing apparatus according to the present invention, the recycled raw material generating means includes a main cylinder provided with a opening wire for opening the end material, and an auxiliary cylinder arranged to face the main cylinder. It is preferable that a plurality of spreaders are provided, and the gap between the main cylinder and the auxiliary cylinder is set so as to gradually decrease along the conveying device (claim 4).

  In this case, since a plurality of spreaders are used, the end material passes through a gap (hereinafter referred to as “gauge”) between the main cylinder and the auxiliary cylinder a plurality of times. Since the gauge is set so as to gradually decrease along the conveying device, the end material is gradually made fine according to the size of the gauge, so that a recycled raw material with less unevenness can be manufactured.

  In the recycled polyester nonwoven fabric manufacturing apparatus of the present invention, the mixed raw material generating means includes a quantitative means for quantifying the recycled raw material and the polyester binder fiber, and the recycled raw material and the polyester binder fiber quantified by the quantitative means. And a mixing means provided with a tank for mixing the above (claim 5).

  In this case, the recycled raw material and the polyester-based binder fiber quantified by the quantitative means are released into the tank, so that the recycled raw material and the polyester-based binder fiber can be sufficiently mixed while falling to the bottom of the tank. . Since variations in the mixed state can be suppressed, a recycled polyester nonwoven fabric with less unevenness in hardness can be produced.

  As described above, according to the present invention, the step of separating and collecting the long fiber component in advance can be omitted. Moreover, since a plurality of spreaders are provided and the respective gauges are set to be gradually reduced, the cut end material can be sufficiently unraveled. For this reason, the end material after cutting can be opened uniformly, and the polyester nonwoven fabric can be sufficiently recycled.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 shows a main part of a recycled polyester nonwoven fabric manufacturing apparatus (hereinafter referred to as a nonwoven fabric recycling machine) of the present invention. The nonwoven fabric recycling machine 1 includes a cutting machine 2 as a cutting means for roughly cutting an end material (hereinafter referred to as an end material) A of a polyester nonwoven fabric, and a regenerated raw material generating means for opening and regenerating the cut end material A. A raw material regenerator 3, a regenerator A and a binder fiber (not shown) are mixed to produce a mixed raw material, a mixer 4 as a mixed raw material generating means, and a mixed end material A and a binder A molding machine 5 as a forming means for molding the fiber and (hereinafter referred to as the mixture C), a heater 6 as a heating means for heating the mixture C after molding, and the end material A and And a conveying device 7 configured by a belt conveyor that conveys the binder fiber.

  The cutting machine 2 includes a rough cutting machine (not shown) and the spreader 30 shown in FIG. The spreader 30 includes spread units 31, 32, and 33.

  The opening units 31, 32, and 33 include main cylinders 31a, 32a, and 33a and auxiliary cylinders 31b, 32b, and 33b. The sizes of the gauges G1, G2, and G3 between the main cylinders 31a to 33a and the auxiliary cylinders 31b to 33b are set to satisfy G1> G2> G3.

  As shown in FIG. 3, the blender 4 includes mixed cotton tanks 51 and 52. As shown in FIG. 4, the molding machine 5 includes a first opening cylinder 61, a first fleece 62, a second opening cylinder 63, and a second fleece 64. As shown in FIG. 5, the heater 6 includes burners 71 and 72, hot air rooms 73 and 74, and a cooler 75.

  Next, operation | movement of the nonwoven fabric reproduction machine 1 mentioned above is demonstrated.

  As shown in FIG. 1, the end material A is first transported to the cutting machine 2 by the transport device 7. Thereafter, the end material A is cut by the opening unit 31 of FIG. 2 and cut to the size of the gauge G1. The end material A is transported in the direction of the arrow X by the transport device 7 and sequentially passes through the opening units 32 and 33. At that time, the end material A is cut into small sizes in order of the gauges G2 and G3.

  Next, the end material A is conveyed to the raw material regenerator 3 by the conveying device 7 (FIG. 1). The raw material regenerator 3 measures and mixes the mixture C. The mixture C weighed and mixed at a predetermined ratio is transported to the mixer 4, put into the blended cotton tank 51 of FIG. 3, and then fed into the blended cotton tank 52. When the mixture C falls in the mixed cotton tanks 51 and 52, the mixing ratio of the mixture C can be improved.

  The mixture C whose mixing ratio is improved passes through the first opening cylinder 61 in the molding machine 5 and then falls inside the first fleece 62. Thereafter, it passes through the second opening cylinder 63, passes through the second fleece 64, and falls onto the conveying device 7. The mixture C falls evenly in the width direction (direction perpendicular to the paper surface) of the fleeces 62 and 64 by the opening cylinders 61 and 63, so that the mixture C can be deposited evenly on the conveying device 7.

  In the hot air rooms 73 and 74 in FIG. 5, the air heated by the burners 71 and 72 passes through the mixture C conveyed to the heater 6, whereby the binder fibers are melted. Thereafter, the binder fiber is solidified by being cooled by the cooler 75, and the bonding strength between the fibers is increased.

  By passing through the above process, the nonwoven fabric reproducing | regenerating machine 1 can recycle the end material of a polyester nonwoven fabric. By adjusting the conveying speed of the conveying device 7 and the dimension Y of the lower end opening 64a of the second fleece 64, the thickness and weight of the mixture C can be adjusted. As a result, a recycled polyester nonwoven fabric having an arbitrary thickness can be produced.

  The present invention is not limited to the form described above, and may be implemented in various forms. For example, the cutting machine 2 may be a single opening unit. Moreover, the blended cotton tank provided in the blender 4 is not limited to two. Three or more blended cotton tanks may be provided, or only one may be provided. The conveyance apparatus 7 is not restricted to the aspect comprised by the belt conveyor. Any device can be used as long as it is capable of conveying the end material A, the binder fiber, and the like, and various configurations can be adopted.

The figure which shows the recycled polyester nonwoven fabric manufacturing apparatus which concerns on one Embodiment of this invention. The figure which shows the inside of the cutting machine of FIG. The figure which shows the structure of the mixer of FIG. The figure which shows the structure of the molding machine of FIG. The figure which shows the structure of the heating machine of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Nonwoven fabric recycling machine 2 Cutting machine 3 Raw material recycling machine 4 Mixer 5 Molding machine 6 Heating machine 7 Transfer device 30 Opening unit 31, 32, 33 Opening machine 31a, 32a, 33a Main cylinder 31b, 32b, 33b Auxiliary cylinder G1, G2, G3 Gap between main cylinder and auxiliary cylinder 51, 52 Cotton blending tank 61, 63 Opening cylinder 62, 64 Fleece 71, 72 Burner 73, 74 Hot air room

Claims (5)

  In the manufacturing method of the recycled polyester nonwoven fabric which recycles the end material of the polyester nonwoven fabric, a first step of roughly cutting the end material and a second step of opening the cut end material to generate a recycled material And a third step of mixing the recycled material and the polyester-based binder fiber to form a mixed raw material, a fourth step of molding the mixed raw material, and a step of heating and solidifying the molded mixed raw material. 5. A process for producing a recycled polyester nonwoven fabric, comprising the step of 5.   The method for producing a recycled polyester nonwoven fabric according to claim 1, wherein in the second step, the fibers are opened by a plurality of opening machines. In the manufacturing apparatus of the recycled polyester nonwoven fabric which reproduces while conveying the end material of the polyester nonwoven fabric product along the conveying device,
Cutting means for roughly cutting the end material;
Recycled raw material production means for producing a recycled material by opening the cut end material,
Mixed raw material generating means for mixing the recycled raw material and the polyester-based binder fiber to generate a mixed raw material;
Forming means for molding the mixed raw material;
Heating means for heating the molded mixed raw material;
An apparatus for producing a recycled polyester nonwoven fabric, comprising: The regenerated raw material generating means includes
A plurality of opening machines provided with a main cylinder provided with a opening wire for opening the end material, and an auxiliary cylinder arranged to face the main cylinder;
The recycled polyester nonwoven fabric manufacturing apparatus according to claim 3, wherein a gap between the main cylinder and the auxiliary cylinder is set so as to gradually decrease along the conveying device. The mixed raw material generating means includes a quantifying means for quantifying the recycled raw material and the polyester binder fiber, and a mixing tank provided with a tank for mixing the recycled raw material quantified by the quantifying means and the polyester binder fiber. Means,
The manufacturing apparatus of the recycled polyester nonwoven fabric of Claim 3 or 4 characterized by the above-mentioned.

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