JPS58174686A - Embossing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a tapered hot embossing device suitable for embossing a leather-like sheet material mainly composed of a thermoplastic resin. More specifically, it is a backrow/L/KM heating embossing device capable of imparting beautiful embossed patterns to leather-like sheet materials.

Conventionally, a heat embossing method has been widely used as a method for completely imparting a pattern to a leather-like sheet material by embossing. Jin's method uses a heated embossing device consisting of a tapered heated metal row/&/or heated metal endless belt and a back roll of high hardness to give a pattern, and is heated to 100°C or higher at a nine-metal mKI pressure. A flexible sheet is attached to -911 #L to give a pattern, and it looks like a branding iron. Therefore, if a pattern is to be beautifully applied, high temperature and pressure are required. As a result, the stiffness increases to the extent that the soft feel of the sheet is impaired, which is undesirable. In addition, the embossing method is to preheat the sheet in advance and emboss it afterwards to make a leather-like sheet, or after embossing, leave the embossed sheet in close contact with the metal surface for a while, and then Other methods include kneeling and then peeling off. However, in either method, high temperature and high pressure are required during embossing, so the texture of the leather-like sheet product cannot be improved.

An object of the present invention is to provide an embossing device that can provide a beautiful embossed pattern with little change in texture in the production of leather-like sheets.

The present invention is a heating embossing device composed of a metal row A/or a metal endless belt and a back roll whose surface is made of an elastic material, and the surface of the back row has a hardness in the range of 5 to 100 degrees as measured by a C-type hardness tester. This is an embossing device equipped with a roll covered with a flexible elastic material.

In addition, the embossing device of the present invention has two elastic layers, the inner elastic layer has a hardness of 20 to 100 degrees measured with a J■8 hardness needle, and the outer elastic layer has a hardness of 20 to 100 degrees measured with a C-type hardness meter. By using an embossing device equipped with rolls coated with elastic bodies with different flexibility measured in the range of 5 to 100 degrees, the flexibility of the sheet to be embossed can be widened, for example. This embossing device can be used to manufacture from flexible leather-like sheet materials suitable for clothing or gloves to slightly hard or thick leather-like sheet materials such as casual clothes, bags, bags, etc.

In the embossing process of the present invention, the effect obtained by using a back roll lv whose surface is coated with an elastic layer of low hardness is that during the process of embossing a sheet, the back roll is deformed and the sheet Since the process of preheating → pressurizing (embossing) → fixing can be performed on an object all at once, heat transfer is ideally carried out, and therefore it is not possible to make the temperature and pressure higher than necessary. The texture of the embossed leather-like sheet material is almost unchanged,
It is also possible to add a beautiful embossed pattern. - Also, as a result of the pond effect, it became possible to speed up the embossing process.

The hardness of the elastic coating layer of the bank roll of the present invention is outer layer #i
The hardness measured with a C-type hardness meter is in the range of 5 to 100 degrees, and for flexible sheets, it is preferable to choose one with a low hardness, but if the hardness is less than 5 degrees, sufficient press pressure will not be applied to the sheet and it will not be possible to emboss it. Causes unevenness. On the other hand, if the temperature exceeds 100 degrees, sufficient press pressure can be obtained, but not only the preheating effect and fixing effect during embossing, which are the objects of the present invention, are insufficient, but also the texture becomes hard, which is not preferable. The hardness range of the inner elastic layer in the case of two elastic layers is also limited for the same reason.

Next, one embossing device of the present invention will be specifically explained. It should be noted that these are only nine embodiments of the apparatus of the present invention in one dormitory, and the present invention is not limited to these embodiments.

Example FIG. 1 is a sectional view of the back row of the embossing device.

Table of iron core 1 Hardness 20 measured with rkJKJXf3 hardness meter
Provide a coating layer 2 of heat-resistant synthetic rubber in the range of ~100 degrees,
Furthermore, a coating layer 3 of heat-resistant synthetic rubber sponge with a hardness in the range of 5 to 100 degrees measured with a C-type hardness needle was provided on top of it. This is a state diagram of the embossing electric field of the sheet material using the embossing device installed in the bank row A/(-. That is, in FIG. When a pressure P is applied to the back roll, the elastic covering layer of the back roll is deformed, and the sheet material 4t is brought into contact with the heated surface over a wide range.

In that case, the 0 point in the preheating zone of the sheet material is embossed at the pressure point, and the B area becomes the heat treatment fixing band for the embossment, and the pattern is beautifully fixed. Preheating time and heat fixing time are determined by roll size, rotation speed,
It can be arbitrarily selected depending on the pressing force.

Now, in Figure 1, the rubber hardness of the inner layer is 45 degrees.

A back roll consisting of two layers with a rubber sponge hardness of about 30 degrees as an outer layer is used, and the base layer is made of fiber-entangled nonwoven fabric containing porous polyurethane, and the surface thereof is coated with a thin layer of non-porous polyurethane, with a thickness of about 0. A 7 ml flexible sheet used for clothing was heated at an embossing roll temperature of 155°C and a gauge pressure of 3. When the sheepskin grain was embossed at s kl/, -4, speed 5~, it was possible to impart a beautiful pattern without impairing the texture of the sheet material.

For comparison, the nine Fi patterns that were embossed under the same conditions using Bank Row LVT's conventional hard rubber row/L/ with a hardness of 125 degrees were not blurry, and the thickness was approximately 0.
．． It decreased to 64m1. In order to give the fertilization a clear texture, the emboss throw μ temperature was 150°C and the gauge pressure was 6”f.
Emboss was performed at /, -4. Although we were able to add an embossed pattern, the thickness of the sheet was approximately 0.59m1.
It was not desirable as a material for clothing because it had a dry texture and a dry texture.

[Brief explanation of the drawing]

The drawings are an example of the pack roll of the embossing device of the present invention, FIG. 1 is a sectional view showing the configuration of the pack roll, FIG. 2 is a sketch thereof, and FIG. 3 is an embossing device equipped with the pack roll of the present invention. This is a state diagram of the factory. 1'17. . Patent applicant RiRashi Co., Ltd. Agent Patent attorney Tate Honda

Claims (1)

[Claims] 1. In a 7t7JIII embossing device consisting of a metal roll or endless metal belt and a back roll whose surface is made of an elastic material, the surface of the back row has a hardness of 5 to 100 as measured by a T-C type hardness meter. 1-
Characteristic embossing device. 2. The elastic layer of the back roll is composed of two layers. The inner elastic layer has a hardness of 20 to 10 measured with a JI8 hardness needle.
0 degrees, the outer elastic layer has a hardness of 5 to 1 measured with a C-type hardness meter.
The embossing device according to claim 1, wherein the embossing device is set in a range of 00 degrees.