JPH0735635B2 - Sheet heat treatment equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a heat treatment apparatus for fibrous sheets, particularly nonwoven fabrics and napped fabrics.

[Conventional technology]

Conventionally, many proposals have been made for heat treatment of fiber sheets, but a heat treatment apparatus for smoothing the surface of non-woven fabrics, napped fabrics, etc., densification, and imparting luster is a heating drum or heating roll and cooling. A drum or a cooling roll is connected with an endless belt, and a sheet to be processed is sandwiched between the endless belt and the drum or roll for processing.
For example, an apparatus shown in FIG. 2 is described as an apparatus used in the method for producing a non-woven sheet in Japanese Patent Publication No. 43-21112. That is, in FIG. 2, the heating drum 11, the cooling drum 12, and the tension adjusting roll 13 are connected by the endless belt 14, and the sheet 16 to be processed is sandwiched between the endless belt and the drum to perform heat treatment. 15 is the endless belt pre-tropics.
Further, as a method for obtaining a high density and smooth surface nonwoven fabric, it is possible to press a reticulated endless belt against the surface of the heating cylinder and hold the nonwoven fabric to be treated between the heating cylinder and the endless belt to perform heat treatment. Japanese Patent No. 10784, Japanese Patent Publication No. 43-358
No. 22, JP-B No. 53-19700, and JP-B No. 57-29590.

[Problems to be solved by the invention]

In a conventional heat treatment apparatus for fiber sheets, surface treatment should be performed without impairing the bulkiness of fiber sheets such as non-woven fabrics and napped fabrics, and in particular, blending of several types of fibers with different softening temperatures or decomposition temperatures of fibers or polymers Performs uniform densification, surface smoothing, or surface treatment of fiber sheets such as non-woven fabrics and napped fabrics made of fibers composed of several polymers having different softening or decomposition temperatures without impairing the texture. It was difficult.

[Means for solving problems]

The present invention is to provide a heat treatment apparatus used for the purpose of uniformly densifying the fiber sheet without impairing the texture, smoothing the surface, particularly fixing the fluff fiber on the surface.

That is, according to the present invention, a superheated roll 1 and a tension adjusting roll 2 paired with the roll 1 are arranged, and a wire mesh or a metal endless belt 4 is stretched over the rolls 1 and 2,
A cooling air jetting zone 8 is arranged between the rolls 1 and 2 in the belt traveling direction, and a pressing roll 5 coated with a porous or non-porous elastic body is arranged on the roll 1 to be treated. This is a heat treatment device for a sheet, which presses the sheet against a heating surface via an endless belt 4 to process the sheet.

Further, in order to increase the density of the fiber sheet or heat the surface strongly with the heat treatment apparatus of the present invention, the heating roll 1
A press roll 7 for adjusting the thickness of the sheet to be treated is provided at the rear of the pressing roll 5, which is effective for adjusting the density of the fiber sheet, adjusting the surface gloss, and strengthening the fixing of the fluff fiber.

The pressing roll 5 of the present invention is a roll coated with a porous or non-porous elastic body and has a surface hardness in the range of 5 to 100 degrees as measured by a C-type hardness meter.
A fiber having a low-softening polymer component, for example, a polyethylene-polyethylene terephthalate bicomponent fiber, has a low hardness roll, while a polyethylene terephthalate fiber-recycled fiber or a natural fiber blend has a high hardness roll. By using a roll having a small surface hardness in this way, the sheet to be treated is not excessively pressed against the heating roll to give local deformation, and the pressing portion of the pressing roll is deformed to have a large area. The sheet can be pressed. That is, compared with the conventional metal roll or hard rubber roll, the sheet to be treated can be heat-treated for a long time under a weak pressure, so that the unevenness of the sheet to be treated becomes small.

In order to fix the heat-treated state of the sheet to be treated of the present invention, the cooling air jet zone 8 is provided to cool and fix the heat-treated sheet.
In addition, the endless belt on which the sheet to be treated is placed differs depending on the shape of the sheet to be treated and the purpose of treatment, and a plain weave wire mesh of 10 to 80 mesh is preferable for increasing the density of the nonwoven fabric and fixing the fluff fibers on the surface of the nonwoven fabric. . In addition, a mirror-finished or satin-finished metal belt is preferred for fixing the napped fibers of the napped cloth and imparting surface gloss. Further, when the belt is soiled with fibers containing a low-softening component in the sheet to be treated, or the fiber components or components adhering to the fibers due to high temperature treatment, etc. A releasable resin film such as a fluorine resin or a silicon resin is formed, and particularly preferably a fluororesin film is formed.

Non-woven fabric, napped woven fabric, napped knitted fabric, ordinary woven fabric, knitted fabric and the like can be applied to the treated sheet to which the heat treatment apparatus of the present invention can be applied. It is suitable for treating non-woven fabrics, napped knitted woven fabrics, and finishing the napped surface of napped fabrics.

Next, the heat treatment apparatus of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view of the heat treatment apparatus of the present invention. 1 is a heating roll that can be heated by steam, heat medium or electric heat,
2 is a tension adjusting roll for the endless belt that is paired with the heating roll 1, 3 is a meandering correction roll for the endless belt, 4 is a wire mesh or metal endless belt on which the sheet to be treated is placed, and 5 is porous or non-porous. A pressing roll for the sheet to be treated coated with an elastic body, 6 is a driving device, 7 is a press roll for adjusting the thickness of the heat-treated sheet or for deforming / fixing the heat-treated surface, and 8 is for fixing the heat-treated sheet in that state. For cooling air, 9, 9'is a pressure cylinder for pressurizing the pressing roll and the tension adjusting roll, 10, 10 'is a guide roll for the entrance and exit of the sheet to be treated, and S is the sheet to be treated. .

[Action]

The endless belt 4 stretched around the heating roll 1, the roll 2, and the roll 3 is rotated by a driving device 6 connected to the roll 1. The sheet S to be processed is placed on the endless belt via the guide roll 10 and pressed against the heating surface by the pressing roll 5. Then, the sheet is strongly pressed by the press roll 7, the state is cooled and fixed by the cooling air jetting zone 8, and the sheet to be treated is heat-treated by peeling it from the endless belt by the guide roll 10 '. .

〔The invention's effect〕

The heat treatment apparatus for a sheet of the present invention is particularly used for heat treatment of a fiber sheet, and is applicable to a wide range of treatments such as smoothing by surface treatment, gloss adjustment, improvement of fiber density, thickness adjustment of non-woven fabric, fixing of fluff fiber, and It is a heat treatment apparatus that can perform heat treatment with high uniformity and with little change in the texture of the treated sheet.

[Brief description of drawings]

FIG. 1 is a side view of a heat treatment apparatus of the present invention, and FIG. 2 is a side view of an example of a conventional heat treatment apparatus for fiber sheets.

 ─────────────────────────────────────────────────── --Continued from the front page (56) Reference JP-A-54-142395 (JP, A) JP-A-57-6276 (JP, A) JP-B 43-21112 (JP, B1) JP-B 57- 29590 (JP, B2)

Claims (5)

[Claims] 1. A heating roll 1 and a tension adjusting roll 2 paired with the heating roll 1 are provided, a wire net or a metal endless belt 4 is stretched over the rolls 1 and 2, and the roll 1 is arranged in the belt traveling direction. The cooling air jetting zone 8 is arranged between the roll 2 and the roll 2, and the pressing roll 5 coated with a porous or non-porous elastic body is further arranged on the roll 1 so that the sheet to be treated is attached to the endless belt 4. Sheet heat treatment device that presses against the heating surface via the sheet. 2. The heat treatment apparatus according to claim 1, wherein the heating roll 1 is provided with a press roll 7 for adjusting the thickness of the sheet to be processed at the rear of the pressing roll 5. 3. The heat treatment apparatus according to claim 1, wherein the surface elastic body of the pressing roll 5 has a hardness of 5 to 100 degrees measured by a C type hardness meter. 4. The heat treatment apparatus according to claim 1, wherein at least a surface of the endless belt 4 which is in contact with the sheet to be treated is coated with a fluororesin. 5. The heat treatment apparatus according to claim 1 or 4, wherein the wire mesh of the endless belt 4 is 10 to 80 mesh.