JP2003049381A - Elastic belt for paper making machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elastic belt for a paper making by solving problems such that since in a type of the elastic belt having an elastic polymer member at the both sides of a base body, a partial thickness difference is generated in the elastic polymer in a felt side to become a cause of water content unevenness of a wet paper, and in a type installing grooves or blind holes on the felt side elastic polymer member, the grooves and holes are collapsed by the wear caused by friction with the felt or pressure during pressing, it is necessary to stop the paper making machine for confirming the above wear and measure the belt by a worker one by one using slide calipers, and efficiency is very low. SOLUTION: This elastic belt for the paper making of which outer surface layer is formed by the elastic polymer member is constituted by coloring the surface parts 21a, 22a and the inner surface parts 21b, 22b of the outer surface layers 21, 22 with different colors so that the degree of wear can be instantly judged by the changes of the colors.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic belt for a papermaking machine including an elastic belt for shoe press, an elastic belt for wet paper web transfer, or an elastic belt for soft calender.

[0002]

2. Description of the Related Art As is well known, an elastic belt having a polymeric elastic member is used in a papermaking machine. That is, in a press section of a papermaking machine, an elastic belt for shoe press whose main purpose is to improve water squeezing property of a wet paper, and an elastic belt for carrying wet paper which is a main purpose for carrying wet paper are used. On the other hand, in recent years, an elastic belt for a soft calender for improving the smoothness of paper has been put into practical use in the calender section of a papermaking machine.

Generally, this type of elastic belt is formed in an endless shape and is composed of a base and a polymeric elastic member. Among the above elastic belts, the elastic belt for shoe press runs with a felt and a wet paper placed between the press roll and the shoe, and ensures the pressure formed between the press roll and the shoe on the wet paper. It is to convey to and to squeeze water.

Many of the elastic belts for shoe press used in the past were single-sided type in which a polymeric elastic member was formed only on one side (shoe side) of a base body, but recently, improvement of abrasion resistance and dehydration property is taken into consideration. Then, a double-sided type in which a polymeric elastic member is formed on the other side (felt side) of the substrate has also appeared. In the case of this double-sided type, it is more effective to provide a groove or a blind hole in the felt-side polymer elastic member so that the water squeezed from the wet paper can be received.

Further, the elastic belt for conveying wet paper is particularly used in a paper machine of a type that does not have an open draw and always supports the wet paper with a belt-shaped body. The wet paper web transfer elastic belt has a surface on which the wet paper web is directly placed, and the surface is formed of a polymer elastic member and is pressed by a press roll and a shoe or a pair of press rolls. .

Further, in the calendering process, in the elastic belt for soft calenders, which has been developed in recent years, the calendering work is performed by being nipped with a paper sheet between a pair of rolls or a pair of rolls and shoes and receiving a nip pressure. It is a thing. In this elastic belt for soft calender, the surface in contact with the paper sheet is formed of a polymeric elastic member.

[0007]

The above-mentioned various elastic belts for papermaking machines have different functions and therefore have different problems in designing and developing. Therefore, each technique is appropriately applied to other elastic belts. Although not applicable, the polymeric elastic members of these elastic belts have a common problem of wear due to contact with felts, shoes, support rolls and the like.

The above-mentioned problems are particularly remarkable in the elastic belt for shoe press. That is, in a double-sided elastic belt having polymer elastic members on both sides of the base, the polymer elastic member on the felt side causes a partial difference in thickness due to abrasion due to friction with the felt, which causes moisture spots on the wet paper. However, in the type in which the polymer elastic member on the felt side is provided with grooves or blind holes, if the grooves or blind holes are crushed by abrasion due to friction with the felt or pressure during pressing, the wet paper will be squeezed. There is a problem in that the water that has been drained cannot be sufficiently received, causing a decrease in dehydration.

Therefore, in order not to cause the above problems to the operator who manages the elastic belt for the papermaking machine,
Stop the papermaking machine at appropriate times, measure the thickness of the belt in use one by one using a caliper, etc. to judge the situation such as abrasion and deformation of the polymer elastic member, and work with extremely poor efficiency I was forced.

In view of the above points, the present invention does not stop the papermaking machine, and the operator does not measure the thickness of the belt one by one using a caliper or the like to wear and deform the polymeric elastic member. It is an object of the present invention to provide an elastic belt for a papermaking machine, which makes it easy to check the situation.

[0011]

In order to achieve the above-mentioned object, the present invention provides an elastic belt for a papermaking machine in which an outer surface layer is formed of a polymer elastic member, and a surface portion of the outer surface layer and an inner surface portion thereof. It is characterized in that and are colored in different colors, and the degree of wear can be immediately and accurately determined by the change in color from the surface portion to the inner surface portion.

The invention according to claim 2 is characterized in that the inner surface portion is formed of a plurality of layers, and adjacent layers including the surface portion are colored in different colors from each other. The wear state after the exposed portion was configured to be easily judged in stages.

The invention according to claim 3 is characterized in that the inner surface portion is composed of a plurality of layers, and all layers including the surface portion are colored in different colors. The wear state after the inner surface was exposed was configured so that the colors could be differentiated in stages.

The invention according to claim 4 is characterized in that a water retaining portion is provided in the outer surface layer so that a color difference appears on the side wall surface of the water retaining portion in a faulty manner.

The invention according to claim 5 is characterized in that the surface portion of the outer surface layer is formed of a polymer elastic member having no light-transmitting property. Configured to expose color.

The invention according to claim 6 is characterized in that the surface portion of the outer surface layer is formed of a polymer elastic member having a light-transmitting property, and is unclear until the surface portion is worn. The color was configured to gradually change to a clear color with abrasion.

The invention according to claim 7 is characterized in that the elastic belt is an elastic belt for shoe press, an elastic belt for wet paper web transfer, or an elastic belt for soft calender, and meets the common problem of abrasion. Configured to be able.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described with reference to FIGS. Note that, in this embodiment, the same parts are denoted by the same reference numerals.

FIG. 1 shows an elastic belt for a papermaking machine (hereinafter,
FIG. 3 is an enlarged cross-sectional view of a “elastic belt” in the CMD direction. The elastic belt 1 is composed of a polymeric elastic member 2 and a base body 3. The upper surface of the elastic belt 1, that is, the surface which is the wet paper web side in the pressing step or the surface on which the paper material such as the paper sheet is arranged in the calendering step is the "first surface" 11
That is, the lower surface of the elastic belt 1, that is, the surface that is in contact with the shoe or the roll is referred to as a "second surface" 12.

The polymeric elastic member 2 is filled in the structure of the base body 3 and, in the case of FIG. 1, is laminated on both upper and lower surfaces of the base body 3. Therefore, the first surface 11 usually refers to the surface of the first outer surface layer 21 formed of the polymeric elastic member 2 on the upper surface side of the base body 3, and the second surface 12 refers to the polymeric elastic material on the lower surface side of the base body 3. It indicates the surface of the second outer surface layer 22 formed of the member 2. The first surface 11 is usually a flat surface 11a, and the flat surface 11a is smoothed by polishing in elastic shoes for shoe presses and calenders. An elastic belt for transportation is often finished to have a rough surface having fine irregularities in order to improve the separation of the wet paper.

The first outer surface layer 21 and the second outer surface layer 22 composed of the polymeric elastic member 2 are often manufactured in separate steps, but the polymeric elastic member 2 is formed in one tissue from one surface of the base body 3. Of course, the first outer surface layer 21 and the second outer surface layer 22 may be formed all at once in one step while impregnating. It is needless to say that the polymeric elastic members filled in the structure of the base body 3 are present, although they are not designated by reference numerals. Also, for the sake of explanation, simply
It goes without saying that the term “outer surface layer” means either one or both of the first outer surface layer and the second outer surface layer.

The polymer elastic member 2 can be selected from rubber and elastomer, but polyurethane resin is preferably used. As the polyurethane resin,
A thermosetting polyurethane resin is preferable from the viewpoint of its physical properties.

The substrate 3 is for developing the strength and dimensional stability of the elastic belt 1. The base body 3 can be composed of a base cloth woven of warp threads and weft threads, and of course, as proposed in recent years, it is composed of superposed warp threads and weft threads without being woven, and a thin strip-shaped nonwoven fabric. Alternatively, it includes a structure in which woven fabrics are spirally overlapped in the width direction, and a structure equivalent to the structure for exhibiting the function of the base body 3.

The first outer surface layer 21 and the second outer surface layer 22 made of the polymeric elastic member 2 are formed on both sides of the base body 3 for any purpose of shoe press, wet paper web transfer and soft calender. It is also used in.
Then, a specific configuration for each application will be described with reference to FIGS.

FIG. 2 shows an example in which the water retaining portion 4 is recessed in the first surface 11 of the first outer surface layer 21 made of the polymeric elastic member 2. This is a structure peculiar to an elastic belt for shoe presses, and the water retaining section 4 is effective for retaining water from the wet paper and felt and improving the water squeezing efficiency.

The water retaining portion 4 is composed of a continuous groove, a single groove (including a blind hole of a circle or a corner) and the like. The water retaining portion 4 has a side wall surface 41 and a bottom surface 42. The water retaining section 4 is
Based on the bottom surface 42, the side wall surface 41 has the protrusion 11
b, the upper surface of the protrusion 11b is the same as the first surface 11.

FIG. 3 shows another example of the elastic belt 1. The elastic belt 1 of this example is formed only by the base body 3 and the first outer surface layer 21 composed of the polymer elastic member 2 on the upper surface side thereof. In this case, the second surface 12 is formed by adjusting the degree of impregnation of the polymer elastic member 2 from the upper surface of the base body 3, or by impregnating the polymer elastic member from the upper surface of the base body 3 and the polymer from the lower surface. It is appropriately selected whether the elastic member is impregnated. The elastic belt 1 of this example may be used as an elastic belt for carrying wet paper or for calendering.

FIG. 4 shows another example of the elastic belt 1. The elastic belt 1 of this example is formed only by the base body 3 and the second outer surface layer 22 composed of the polymeric elastic member 2 on the lower surface side thereof. In this case, the first surface 11 is formed by adjusting the degree of impregnation of the polymeric elastic member 2 from the lower surface of the base body 3, or by impregnating the polymeric elastic member from the lower surface of the base body 3 and the polymer from the upper surface. It is appropriately selected whether the elastic member is impregnated. The elastic belt 1 of this example may be adopted as a shoe press elastic belt.

Among the elastic belts 1, those shown in FIGS. 5 to 15 are referred to as “belt of the present application” 20. Belt 2 of the present application
0 indicates that the surface portion 21a and the inner surface portion 21b of the first outer surface layer 21 made of the polymer elastic member 2 on the upper surface side of the base body 3 are colored in different colors (shown by hatching and plain in FIG. 5). The distinct colors here are not shown specifically,
Those that can be clearly discriminated between the two are selected. As a coloring method, a dye (a dye, a pigment, etc.) which is generally ordinarily used is mixed prior to impregnation / application of the polymeric elastic material 2 on the substrate 3, or the polymeric elastic material 2 is mixed. There is another method in which the elastic polymer material 2 is colored by spraying a paint when the base material 3 is impregnated or applied.

In the belt 20 of the present invention shown in FIG. 5, when the surface portion 21a of the first outer surface layer 21 made of the polymer elastic member 2 is worn away, the inner surface portion 21b of a different color is exposed. . Therefore, since the user can determine the difference in color even while the papermaking machine is running, this not only makes it possible to easily know the wear condition, but also the external surface caused by running fatigue caused by repeated presses. It is possible to easily judge the peeling or crack of the layer itself. This judgment can be more accurately and simply viewed when the papermaking machine is stopped or moved slowly.

The surface portion 21a of the first outer surface layer 21 made of the polymeric elastic member 2 of the belt 20 of the present invention shown in FIG.
It is made of a material that does not have translucency. That is,
If the surface portion 21a is made of a material that does not have a light-transmitting property, the color of the inner surface portion 21b inside the surface portion 21a cannot be seen through. Therefore, a new color suddenly appears only when the surface portion 21a is worn. It will be possible to let the user know the wear state dramatically.

The belt 20 of the present invention shown in FIG.
The case where a is formed of a light-transmitting material is shown. In this case, the inner surface portion 21b (shown by hatching) 21b inside the transparent surface portion 21a is not visible or is indistinct in a normal state, and the surface portion 21a is not visible.
As the wear progresses, the color of the inner surface portion 21b gradually becomes recognizable, and when the inner surface portion 21b is completely exposed, the wear state can be recognized with time in a clear color. It can be said that this identification performance is more effective when the light-transmissive material is semitransparent or colored and transparent than a completely transparent material.

The belt 20 of the present invention shown in FIG. 7 has a plurality of inner surface portions 21b (outer layer 21b1 and inner layer 21b2).
), And adjacent layers including the surface portion 21a are colored in different colors. In this case, the surface portion 21
The wear state after a is worn and the inner surface portion 21b is exposed can be easily determined stepwise. That is, as the wear progresses, the first surface 11 has the surface portion 21 a and the inner surface portion 21.
Since the outer layer 21b1 and the inner layer 21b2 of b are exposed in this order, the wear state can be accurately confirmed by the user step by step.

In the belt 20 of the present invention shown in FIG. 7, the adjacent layers including the surface portion 21a are colored in different colors. First, the outer layer 21b1 of the inner surface portion 21b is colored.
Only the special color (hatching) is used to make the surface portion 21a and the inner layer 21b2 of the inner surface portion 21b the same color (plain), and secondly, the outer layer 21b1 of the surface portion 21a and the inner surface portion 21b. And the inner layer 21b2 have different colors. In any of the above cases, it is common in that the wear state can be accurately confirmed step by step, but when configured as the above first,
It is possible to use a color material common to several layers, which is advantageous in cost.

Further, in the belt 20 of the present invention of the above-mentioned example, the inner surface portion 21b has two layers of the outer layer 21b1 and the inner layer 21b2, and the inner surface portion 21a has a convenient three-layer structure including the surface portion 21a. It is needless to say that 21b may be made into multiple fine layers and each layer may be colored by the first or second method.

The belt 20 of the present invention shown in FIGS. 5 to 7 has a second outer surface layer 22 composed of the polymeric elastic member 2 on the lower surface side of the base body 3.
Although the elastic belt 1 in which the second outer surface layer 22 does not exist is used as shown in FIG. 8, the belt 20 of the present application may be configured. That is, in the belt 20 of the present application shown in FIG. 8, the surface portion 21 a and the inner surface portion 21 of the first outer surface layer 21 formed of the polymeric elastic member 2 on the upper surface side of the base body 3 are provided.
b is colored in a different color. The function and effect of this configuration are similar to those of FIG.

Next, the elastic belt for shoe press will be described. The belt for this purpose is characterized in that the water retaining portion 4 is provided in the first outer surface layer. This water retention part 4
Is a groove or the like on the first surface 11 of the belt 20 of the present application formed by coloring the surface portion 21a and the inner surface portion 21b of the first outer surface layer 21 formed of the polymeric elastic member 2 on the upper surface side of the base body 3 in different colors. It is obtained by making a recess.

The elastic belt for shoe press shown in FIG.
As shown in FIG. 5, the first surface 11 of the belt 20 of the present application obtained by coloring the surface portion 21a and the inner surface portion 21b of the first outer surface layer 21 made of the polymeric elastic member 2 on the upper surface side of the base body 3 in different colors.
Further, the water retaining portion 4 is formed deeper than the layer thickness of the surface portion 21a. In this case, the color difference appears on the side wall surface 41 of the water retaining portion 4 in a faulty manner. Therefore, it is possible to know the degree of wear by observing the fault surface, and also to know the degree of wear by changing the color of the top surface (first surface 11) of the protrusion 11b, which is a portion other than the recessed water retaining portion 4. You can

In the elastic belt for shoe press shown in FIG. 10, as shown in FIG. 6, the surface portion 21a is formed on the first surface 11 of the belt 20 of the present application, and the layer thickness of the surface portion 21a is formed. The water retaining portion 4 is formed deeper.
In this case, the portion other than the recessed water retaining portion 4 (the protruding portion 11
As the color of the side wall surface 41 and the bottom surface 42 of the water retaining portion 4 gradually emerges as the top surface of b) wears, the degree of wear can be known from that phenomenon.

In the elastic belt for shoe press shown in FIG. 11, as shown in FIG. 7, the inner surface portion 21b has a plurality of layers (outer layer 21b1 and inner layer 21b2) on the first surface 11 of the belt 20 of the present application. The water retention part 4 is formed deeper than the layer thickness of the surface part 21a. Also in this case, since the color difference appears on the side wall surface 41 of the water retaining portion 4 in a faulty manner, the degree of wear can be known by looking at the faulty surface, and the protruding portion that is a portion other than the recessed water retaining portion 4 can be known. The degree of wear can also be known from the change in color of the top surface (first surface 11) of 11b.

In the elastic belt for shoe press shown in FIG. 12A, a fine color difference is formed on the side wall surface 41 of the water retaining portion 4 in a faulty manner (the outer layer 21b1 of the inner surface portion 21b).
Only the part of the multi-colored multi-layer) and these and the water retention part 4
The inner layer 21b2 of the inner surface portion 21b including the bottom portion 42 of FIG. In this case, a multicolor layer of the outer layer 21b1 of the inner surface portion 21b changes from the color of the surface portion 21a to the top surface of the portion (projection portion 11b) other than the recessed portion as the water retaining portion 4 due to the progress of wear. Since it gradually changes, it becomes possible to know the degree of wear in detail. Further, the elastic belt for shoe press having the water retaining portion 4 is not used until the water retaining portion 4 is completely worn (disappeared), and when the water retaining portion 4 remains to some extent as shown in FIG. End of life.

In the elastic belt for shoe press shown in FIG. 12B, the top surface of the protruding portion 11a, which is a portion other than the water retaining portion 4, is rounded due to abrasion and the protruding portion 11a.
Is in a state of digging into the inner layer 21b2 of the inner surface portion 21b forming the bottom portion 42 of the water retention portion 4. It can be confirmed that in these states, that is, in the case, the main cause is wear due to contact with the felt, and in the case, it is confirmed that the main cause is the collapse of the water retaining portion 4 due to the press pressure. These may appear at the same time, but either of them may come first, and in such a case, the main cause thereof can be easily confirmed. Therefore, these causes can be utilized for proper design of the elastic belt and operation of the papermaking machine.

In other words, as shown in FIG. 12A, by making the side wall surface 41 of the water retaining portion 4 have a fine color difference in a fault-like manner, the degree of wear can be known.
It is also possible to solve the problem peculiar to the water retention section 4.

The belt shown in the above embodiment wears the polymeric elastic member constituting the first surface 11 which is the surface on which the paper material such as the wet paper in the pressing process and the paper sheet in the calendering process is arranged. Although the countermeasures have been described, the countermeasures against abrasion of the polymer elastic member forming the second surface 12 that contacts the shoe or the roll can be considered in the same manner. Typical examples of this are shown in FIGS.

The belt 20 of the present invention shown in FIG.
The surface portion 22a and the inner surface portion 22b of the second outer surface layer 22 made of the polymeric elastic member 2 on the lower surface side of the above are colored with different colors (hatched and solid in the figure). In this case, when the surface portion 22a of the second outer surface layer 22 is abraded due to friction with a shoe or a roll, the inner surface portion 22b of a color different from the surface portion 22a is exposed on the second surface 12. Although this second surface 12 is the back surface of the belt, the user can easily check the difference in color of the second surface 12 while traveling endlessly, so that the wear state can be visually recognized.

The belt 20 of the present invention shown in FIG. 14 has a plurality of inner surface portions 22b (outer layer 22b1 and inner layer 22b2).
), And the adjacent layers including the surface portion 22a are colored in different colors from each other. In this case, the surface portion 22
It is possible to easily determine the degree of wear after a is worn by friction with a shoe or a roll and the inner surface portion 22b is exposed. That is, when the second surface 12 is worn, the surface portion 22
a, the outer layer 22b1 of the inner surface portion 22b, the inner layer 22
Since b2 is exposed to the second surface 12 in this order, it is possible for the user to confirm the wear condition accurately step by step.

The belt 20 of the present invention shown in FIGS. 13 and 14 uses the elastic belt 1 having the first outer surface layer 21 made of the polymeric elastic member 2 on the upper surface side of the base body 3, but FIG. As shown in, the elastic belt 1 without the first outer surface layer 21 may be used. That is, FIG.
In the belt 20 of the present application shown in FIG. 5, the surface portion 22a and the inner surface portion 22b of the second outer surface layer 22 formed of the polymeric elastic member 2 on the lower surface side of the base body 3 are colored in different colors. The operation of the belt 20 is similar to that of FIGS. 13 and 14.

Although not shown in the above embodiment, the first outer surface layer 21 made of the polymeric elastic member 2 on the upper surface side of the base body 3 and the second outer polymeric layer 2 made of the lower surface side of the base body 3 are formed. Respective surface portions 21a, 22a of the outer surface layer 22
The inner surface portions 21b and 22b may be colored in different colors so that the wear degree of both the first surface 11 and the second surface 12 can be easily determined.

[0049]

As described above, the present invention provides an elastic belt for a papermaking machine in which an outer surface layer is formed of a polymer elastic member,
Since the surface portion of the outer surface layer and the inner surface portion thereof are colored in different colors, the abrasion degree is immediately visible only due to a change in the color of the belt outer surface (first surface or second surface). You can judge. Therefore, the operator can easily check the wear condition without stopping the papermaking machine and without measuring the belt thickness one by one using a caliper. Also,
It is also possible to easily determine peeling, cracking, and the like of the outer surface layer due to running fatigue caused by repeated pressing. Moreover, it has an excellent effect that the working efficiency for confirming the degree of wear and for judging peeling, cracking, etc. can be remarkably improved.

Further, the invention according to claim 2 is characterized in that the inner surface portion is composed of a plurality of layers, and the adjacent layers including the surface portion are colored in different colors from each other. The present invention has an excellent effect that the wear state after the wear and the inner surface portion is exposed on the first surface can be easily judged in stages, and the improvement of the work efficiency for judging the wear degree can be expected.

Furthermore, the invention according to claim 3 is characterized in that the inner surface portion is formed of a plurality of layers, and all layers including the surface portion are colored in different colors. The present invention has an excellent effect that it is possible to easily judge the wear state after the wear due to wear and the inner surface portion is exposed in different colors, and an improvement in the work efficiency for judging the wear degree can be expected.

Furthermore, since the invention according to claim 4 is characterized in that the water retaining portion is provided in the outer surface layer, the abrasion degree is caused by the difference in color which appears in a faulty manner on the side wall surface of the water retaining portion. The present invention has an excellent effect that the color classification can be easily performed, and the compression collapse condition of the water retaining portion due to the press pressure, which is a problem peculiar to the belt having the water retaining portion, can be visually confirmed.

Furthermore, the invention according to claim 5 is characterized in that the surface portion of the outer surface layer is formed of a polymer elastic member having no light-transmitting property. By this, a new color is exposed, and therefore, a change due to wear almost suddenly occurs, which is an excellent effect that the wear state can be immediately known to the user.

Further, the invention according to claim 6 is characterized in that the surface portion of the outer surface layer is formed of a polymer elastic member having a light-transmitting property. By changing the existing color to a vivid color, the wear state can be easily known with time, which is an excellent effect.

Further, the invention according to claim 7 is characterized in that the elastic belt is an elastic belt for shoe press, an elastic belt for wet paper web transfer, or an elastic belt for soft calender, so that it is called abrasion. It has an excellent effect of being able to deal with common problems.

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view of an elastic belt.

FIG. 2 is a partially enlarged sectional view of an elastic belt having a water retaining portion on a first surface.

FIG. 3 is a partially enlarged sectional view of an elastic belt having a base and a first outer surface layer.

FIG. 4 is a partially enlarged sectional view of an elastic belt having a base and a second outer surface layer.

FIG. 5 is a partially enlarged cross-sectional view of the belt of the present application in which the surface portion of the first outer surface layer and the inner surface portion thereof are colored in different colors.

FIG. 6 is a partially enlarged cross-sectional view of the belt of the present application in which the surface portion of the first outer surface layer is made of a light-transmitting material.

FIG. 7 is a partially enlarged cross-sectional view of the belt of the present application in which the inner surface portion of the first outer surface layer has a plurality of layers, and adjacent layers including the surface portion are colored in different colors from each other.

FIG. 8 is a partial enlarged cross-sectional view of the belt of the present application configured by using an elastic belt including only a base and a first outer surface layer.

FIG. 9 is a partially enlarged cross-sectional view of the belt of the present application in which a water retaining portion is formed on the first surface.

FIG. 10 is a partially enlarged cross-sectional view of the belt of the present application in which a water retaining portion is formed on the first surface of which the surface portion is made of a translucent material.

FIG. 11 is a partially enlarged cross-sectional view of the belt of the present application in which the inner surface portion has a plurality of layers, the adjacent layers including the surface portion are colored in different colors, and the water retaining portion is formed on the first surface.

FIG. 12 is a partially enlarged cross-sectional view of the belt of the present application in which a fine color difference appears on the side wall surface of the water retaining portion in a fault form, (A) shows a state before use, and (B) shows a worn state.

FIG. 13 is a partially enlarged cross-sectional view of the belt of the present application in which the surface portion of the second outer surface layer and the inner surface portion thereof are colored in different colors.

FIG. 14 is a partially enlarged cross-sectional view of the belt of the present application in which the inner surface portion of the second outer surface layer has a plurality of layers, and adjacent layers including the surface portion are colored in different colors from each other.

FIG. 15 is a partially enlarged cross-sectional view of a belt of the present application configured by using an elastic belt including only a base and a second outer surface layer.

[Explanation of symbols]

1 elastic belt 11 First side 11a flat surface 11b protrusion 12 Second side 2 Polymer elastic member 20 Belt of the present application 21 First Outer Layer 21a surface part 21b inner surface 21b1 Outer layer of inner surface 21b2 inner layer of inner surface 22 Second outer layer 22a surface part 22b inner surface 22b1 Outer layer of inner surface 22b2 Inner layer of inner surface 3 base 4 water retention section 41 Side wall surface 42 Bottom

Claims (7)

[Claims] 1. An elastic belt for a papermaking machine, wherein an outer surface layer is formed of a polymer elastic member, wherein a surface portion of the outer surface layer and an inner surface portion thereof are colored in different colors. belt. 2. The elastic belt for a papermaking machine according to claim 1, wherein the inner surface portion has a plurality of layers, and adjacent layers including the surface portion are colored in different colors from each other. 3. The elastic belt for a papermaking machine according to claim 1, wherein the inner surface portion has a plurality of layers, and all layers including the surface portion are colored in different colors. 4. The elastic belt for papermaking machines according to claim 1, wherein a water retaining portion is provided in the outer surface layer. 5. The elasticity for a papermaking machine according to claim 1, wherein a surface portion of the outer surface layer is formed of a polymer elastic member having no translucency. belt. 6. The elastic belt for a papermaking machine according to claim 1, wherein the surface portion of the outer surface layer is formed of a light-transmitting polymer elastic member. 7. The elastic belt is an elastic belt for shoe press, an elastic belt for wet paper web transfer, or an elastic belt for soft calender.
An elastic belt for a papermaking machine according to 1 above.