JP2000313082A - Raised body and laminate using felt comprising biodegradable fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a raised body and a laminate using felt which can be decomposed and assimilated rapidly by being discarded into earth after use, has improved use properties, and can be used in wide applications. SOLUTION: In a felt laminate 1 in which at least two sheets of felt comprising biodegradable fibers are joined peelably from each other, one of the two surfaces which appear by peeling adjacent felt sheets is raised (R), and the other is relatively smooth (S). The laminate can be used as a white board eraser, shoe insoles, a floor sheet, a wiping cloth, and others. A biodegradable felt-raised body in which the fibers of one surface obtained by peeling each felt layer from the laminate are raised can be used as various sheets such as an interior finish sheet and others.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a raised body and a laminate using felt made of biodegradable fibers. The above-mentioned raised body and laminate of the present invention are widely used in various sheets such as a soundproof sheet, a floor sheet, an interior sheet and the like, as well as a whiteboard eraser, a shoe insole and the like.

[0002]

2. Description of the Related Art Felt obtained by shrinking (filling) hair fibers such as wool and other animal hair has been widely used for various rugs (sheets), hats, slippers and the like. As described above, conventional felt is made of wool and other wool fibers and has no adverse effect on the human body.However, after use, it has a problem of generating offensive odor when incinerated, and does not easily decompose even after disposal, and remains as garbage for a long time There was a problem to do. Until now, such problems with respect to felt have not been considered at all, but in recent years, interest in environmental protection has increased, and there is a demand for solving the problem of post-use treatment with felt.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in order to meet such a demand, and is a felt which can be quickly decomposed and assimilated by being disposed of in the soil after use, and An object of the present invention is to provide a brushed body and a laminated body using felt, which have extremely improved usability and can be used for a wide range of applications.

[0004]

Means for Solving the Problems The present inventor has conducted intensive studies in order to solve the above-mentioned problems, and as a result, a laminated body in which a plurality of felts made from biodegradable fibers are joined through a specific process easily. The present inventors have found that the felt can be peeled off from each felt, and that the felt surface obtained by further peeling exhibits a form useful for various uses, and further studied, thereby completing the present invention.

That is, the present invention provides the following (1) to (6)
The present invention relates to a brushed body and a laminate using a felt made of biodegradable fibers described in (1) and a method for producing the same. (1) A felt laminate in which at least two felts made of biodegradable fibers are peelably bonded to each other, wherein a certain felt and a felt adjacent to the felt have two surfaces that appear by peeling them. A biodegradable felt laminate characterized in that one is brushed and the other is joined so as to be relatively smooth. (2) The biodegradable felt laminate according to the above (1), which is used as a whiteboard eraser, shoe insole, floor sheet or wiping cloth. (3) A biodegradable felt raised body, wherein fibers on one surface of the felt made of biodegradable fibers are raised. (4) The biodegradable felt raised body according to the above (3), which is used as a shoe insole, a soundproof sheet, a floor sheet, an interior sheet or a wiping cloth. (5) The raw fabric according to the above (1) or (2), wherein a needle punch is pierced in only one side of the felt multilayer body formed by stacking at least two felts made of biodegradable fibers in the thickness direction of the multilayer body. A method for producing a degradable felt laminate. (6) A needle punch is pierced in only one side of a felt multilayer body formed by stacking at least two felts made of biodegradable fibers in the thickness direction of the multilayer body, and each felt is peeled off. Or the method for producing a biodegradable felt raised body according to (4).

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the biodegradable fiber constituting the felt refers to a soil when the above-mentioned raised body or laminate made of the felt or a part of the layer is used or the like. Refers to fibers that can be degraded by microorganisms by disposal in or in water, and can be natural or synthetic or semi-synthetic. For example, polylactic acid, polyglycolic acid, polycaprolactone, an aliphatic copolymerized polyester, for example, an aliphatic polyester of a polyol such as 1,4-butanediol and an aliphatic carboxylic acid such as succinic acid and adipic acid, polyvinyl alcohol, etc. And polyethers, for example, polyethylene glycol (PEG), polypropylene glycol (PPG), etc., but are not limited thereto, and any one can be used as long as the above conditions are satisfied. is there. In addition, the biodegradable fibers used in the present invention include sugars such as glucose, sucrose, starch, and cellulose and derivatives thereof (such as sugar alcohols), which are known to further enhance biodegradability, and autoxidation. Agents, oxidized oils or metal salts, metal oxides or metal hydroxides, and by incorporating a photodisintegration-imparting agent, which is generally called a photosensitive reagent, in addition to biodegradability, May be provided.

The felt used in the present invention is a sheet in which the biodegradable fiber is formed into a sheet by needle punching. The thickness and size of the felt can be appropriately selected depending on the application. For example, the thickness is usually 0.5
From about mm to about 20 to 30 mm for thick ones, it can be made hard or soft by changing the density even for the same thickness. Further, in the present invention, "brushed" means that the biodegradable fiber is flared from the surface of the felt base material, the length thereof is not particularly limited, and the type of felt used and the felt laminate Alternatively, it may vary depending on the production conditions of the raised body, etc., and the length of the raised hair on one piece of felt may vary, but it is usually 1 mm to 5 mm, preferably 1.
It is about 5 mm to 4.0 mm.

[0008] The laminate using the felt composed of the biodegradable fiber of the present invention is manufactured by piercing a needle punch from only one side of the felt laminate obtained by laminating at least two felts in the thickness direction of the laminate. Then, by peeling off each felt of the laminate, a brushed body using the felt made of the biodegradable fiber of the present invention can be produced. Here, when manufacturing a laminated body in which three or more felts are stacked, all the felts may be stacked from the beginning and needle-punched. It is preferable to pile the felts one by one and to perform needle punching each time, since the raised hair generated on one surface when each felt layer is peeled is more uniform. The conditions of the needle punch, such as the type of needle, the number of punctures, the depth of the needle, and the like, can be appropriately selected depending on the purpose of use of the laminated body or the raised body, and the type of felt used (fiber count, etc.). However, regardless of which condition is adopted, it is important to pierce the needle punch from only one side of the felt multilayer body, and after the needle punch, each felt of the laminated body in which each felt is joined can be easily removed by hand. It is necessary that the bonding strength is such that it can be peeled, that is, separated. The needle (needle) used for the needle punch has, for example, several or more than a dozen barb-like substances called hooks called barbs on the side surface of the tip of the needle. 2 32 15 × 18 × 32 × 3.
Reference numeral 5 denotes a needle having nine triangular barbs at each vertex of a triangular blade in cross section. The first barb is located 6.5 mm from the needle tip at one vertex of the triangular shape, and the second barb is positioned at the vertex. 8.6 from the needle tip at another vertex
mm, and the third barb is positioned 10.7 mm from the needle tip at yet another vertex (the above distance indicates the position of the barb trailing end). The needle depth indicates a distance through which the needle penetrates the felt. When the needle made by Organ is described as, for example, a needle depth of 6.5 mm, the first barb of the penetrated needle is located at the lowermost surface of the felt (needle). (The side opposite to the side where the road enters). In addition,
The peel strength of the laminated felt and the length of the raised hair after peeling can be appropriately adjusted by the distance between the barbs and the needle depth.

The use of the biodegradable felt laminate of the present invention is not particularly limited. Among them, whiteboard erasers, shoe insoles (substitutes for socks), floor sheets or wipes (substitutes for rags) Useful as Since each layer of the felt can be easily peeled off by hand, a new felt layer appears by removing a layer which is soiled or damaged by use, and can be used as it is. The felt surface may be a brushed surface or a relatively smooth surface. However, when the felt is used as an eraser for a wide board, the brushed surface is preferably used. The use of the biodegradable felt brushed body of the present invention is not particularly limited, but it is particularly useful to use the brushed surface as various sheets, for example, a soundproof sheet, a floor sheet or an interior sheet. Further, when the biodegradable felt laminate and the biodegradable felt raised body of the present invention are used for various applications as described above, various additives and the like may be added to the biodegradable fiber according to each application. Alternatively, it may be mixed before or after joining the felt. For example, a deodorant or an acaricide may be mixed before spraying into a shoe insole or various sheets, or a wax, a detergent, etc. may be immersed in a wiping cloth before or after felt bonding. And the like.

[0010]

Next, embodiments of the present invention will be described with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

Example 1 A staple made of polylactic acid fiber and having a fiber diameter of 11 decitex and a fiber length of 51 mm was formed into a wave by a card machine, and then needle-punched from above and below to obtain a thickness of 2.5 mm and a weight of 400 g / m2. ^Two felts were made. A needle punch was pierced from only one side of the multilayer body in which two felts were stacked in the thickness direction of the multilayer body to produce a two-layer laminated felt. At this time, as the needle for the needle punch, “FDP-2322” manufactured by Organ Corporation is used.
Using 15 × 18 × 32 × 3.5 ”, the felts were laminated under the conditions that the number of stabs (number of penetrations) was 100 needles / cm ² and the needle depth was 6.5 mm. Next, a needle punch is pierced in the thickness direction of the multilayer body from only one side (in the same direction as when the two-layer felt was produced) of the multilayer body in which one layer of felt is further stacked on the two-layer laminate felt prepared above. A three-layer laminated felt was prepared, and the same operation was further repeated twice.
Finally, a five-layer laminate was produced. The conditions for these needle punches were the same as those for the production of a two-layered felt with the number of needles used and the number of penetrated needles.
2.5 mm for layer stacking and 0.5 mm for 5 layer stacking
And The thus obtained felt laminated body composed of five laminated bodies has an overall thickness of 10 mm and a weight of 160 mm.
0 g / m ² , and the length of the raised surface obtained by peeling each layer was about 2.0 mm, though slightly different for each layer. FIG. 1 shows a side view of the obtained felt laminate. The arrow indicates the direction in which the needle punch was pierced. Here, the uppermost felt on the side where the needle punch was pierced is referred to as a first layer, and the lower layers are sequentially referred to as a second layer and a third layer, respectively.
The layers are referred to as a layer, a fourth layer, and a fifth layer (the same applies to the layer numbers in the following examples). In the figure, the numbers in parentheses on the left side of each felt layer indicate the layer numbers. Fifth
By manually peeling the layer from the fourth layer, the fifth layer of the fourth layer
The bonding surface with the layer becomes the raised surface R (therefore, the surface on the other fifth layer side becomes the smooth surface S). And likewise the fourth
By peeling the layer from the third layer, the newly emerged surface of the third layer (the bonding surface with the fourth layer) is raised, and the other surface is relatively smooth. As shown in FIG.
The layer forms a single raised body 2, one surface being a raised surface R and the other surface being a smooth plane S. In the example shown above, five layers of felt are stacked, but more generally,
When m layers (m is an integer greater than 2) are overlapped and joined, if the layer number is given in the same manner as described above, the (n + 1) th layer (1 ≦ n ≦ m
-1) is peeled off from the n-th layer to form the n-th layer
The bonding surface with the (+1) th layer, that is, the newly appearing surface of the nth layer is raised (R surface), and the bonding surface of the (n + 1) th layer with the nth layer is relatively smooth (S surface). Example 2 5 cm × 8 cm from the felt laminate produced in Example 1
3 was cut out, and as shown in FIG. 3, the end face of the block forming the eraser section 31 on the first layer side was covered with a case 32 to obtain a whiteboard eraser 3. In this whiteboard eraser, the brushed surface R of the fourth layer appears by peeling the fifth layer, and the handwriting on the board can be easily erased by tracing the whiteboard with the case 32 forming the grip portion. Is possible,
And it does not hurt the board. Further, when the surface of the fourth layer is soiled, the brushed surface of the third layer appears by peeling the fourth layer, and the handwriting can be newly erased. As described above, since the layer that is very easy to use and that is soiled and peeled off is made of biodegradable fibers, it is quickly decomposed in soil or water by discarding. Example 3 An appropriate insole shape was cut out from the felt laminate prepared in Example 1, the fifth layer was peeled off, and the second and third layers were removed.
Peel off at the interface of the layers. Thereby, the first and second layers, the third layer
A shoe insole formed by a laminate of two layers each consisting of a layer and a fourth layer is obtained. FIG. 4 shows the shoe insole 4. By laying the shoe insole 4 on the shoe so that the raised surface R is exposed and comes into contact with the foot, the raised can give a soft feeling to the foot and can be used as a shoe insole capable of absorbing moisture appropriately. This insole has two layers, and when the surface layers (second layer, fourth layer) are soiled, they are peeled off to form new surfaces (first layer, first layer) which are also raised. 3 layers) appear and can be used longer and longer. Further, the peeled layer is quickly decomposed by disposal, and does not adversely affect the environment. In addition, although the example of the two-layer shoe insole was shown in this example,
Although only one layer or three or more layers may be used, in the latter case each felt will need to be thinner. Example 4 A felt laminate was produced by repeating the same procedure as in Example 1 except that the thickness of each felt was set to 1 mm, and four felts were laminated. This felt laminate was cut into a size of about 20 cm × 30 cm to obtain a wiping cloth.
By peeling off the fourth layer, the surface of the third layer becomes a raised surface. By wiping the part to be cleaned with the wiping cloth having the raised surface, dust and dirt are well adsorbed to the raised portion.
By preliminarily impregnating a detergent or the like into the surface to be the wiping surface of each felt layer, it is possible to make the wiping cloth more functional. When the wiping surface is soiled, the felt layer is peeled off, and new clean wiping surfaces appear one after another, which is very convenient. The soiled layer can be quickly biodegraded by discarding. Example 5 A staple having a fiber diameter of 6.6 decitex and a fiber length of 51 mm made of aliphatic polyester (polyester of 1,4-butanediol and succinic acid or adipic acid) fibers was formed into a wave by a carding machine, and then formed on the staple. Needle punch from top and bottom, thickness 4.5mm, weight 650
g / m ² felt was prepared. A needle punch was pierced from only one side of the multilayer body in which two felts were stacked in the thickness direction of the multilayer body to produce a two-layer laminated felt. At this time, as a needle for a needle punch, “FDP-232 15 × 18 × 32 ×” manufactured by Organ Corporation is used.
3.5 ”and the number of stabs (number of penetrations) is 100 / c
The felt was laminated under conditions of m ² and a needle depth of 6.5 mm. Next, one additional layer was added to the two-layer laminated felt prepared above.
A needle punch was pierced in the thickness direction of the multilayer body from only one side of the multilayer body in which the single-layer felts were stacked (in the same direction as when the two-layer multilayer felt was manufactured), thereby manufacturing a three-layer multilayer felt.
The conditions of the needle punch used at this time were the same as those for the production of the two-layer laminated felt, with the number of needles and the number of penetrations being 1.5 m.
m. The thus obtained felt laminated body composed of three laminated bodies has an overall thickness of 12 mm and a weight of 16 mm.
00 g / m ² , and although the length of the raised surface obtained by peeling each layer is slightly different for each layer, it is approximately 4.0 mm.
Met. Cut this felt laminate into a suitable size,
The sheet was adhered to the floor so that the side on which the needle punching was performed faced the floor, to obtain a floor sheet. By peeling off the third layer, a surface having a raised layer of the second layer appears, and the feeling is good,
Relieves the impact of walking and stays warm even with bare feet. If the surface of the second layer becomes dirty or damaged, a new first layer having a raised surface appears by peeling the second layer,
The layer which can be used in the same way and which has been peeled off is quickly decomposed by disposal and does not adversely affect the environment. In this way, the multilayer floor sheet of the present embodiment is used as an actual floor sheet, and each felt layer is formed into a laminate using different colors and patterns, and is used as a product sample. Since different colors and patterns appear each time the felt layer is peeled off, consumers can make more realistic selections and can be used as those that provide a very high display effect. In addition, the second of the felt laminate
Of course, each of the layer and the first layer can be used as a normal floor sheet only as a single layer. Example 6 An appropriate size (about 90 × 180 cm) was cut out from the felt laminate prepared in Example 1, and peeled in the order of the first layer, the second layer, the third layer, and the fourth layer. Used as It can follow and adhere to not only flat indoor walls, but also walls with complicated shapes (adhesion between walls and smooth surfaces to expose brushed surfaces to the surface). (The base material and the smooth surface are adhered to each other to expose the raised surface to the surface), and the raised surface gives a luxurious feeling and an excellent feel. In addition, after these interior sheets have been used for a certain period of time, they are quickly decomposed by being peeled off from the wall or the base material and discarded, and do not pollute the environment. Further, such an interior sheet can also be used as a soundproof sheet by utilizing an excellent sound absorbing effect due to the raising.

[0012]

As described in detail above, the laminated body using the felt made of the biodegradable fiber of the present invention can easily peel off each felt layer by hand unlike the conventional laminated felt. In addition, one of the two surfaces generated by the separation of the joint surface is raised, and the other is relatively smooth. Therefore, a new brushed surface can be exposed one after another by peeling by hand, and is preferably used as a whiteboard eraser, shoe insole, floor sheet or wiping cloth. It is biodegraded promptly by disposal, and not only does not burden the environment, but also can be composted, that is, composted, by using biodegradable fibers such as polylactic acid, polyglycolic acid, and aliphatic polyester. . Each felt layer peeled from the laminate of the present invention also has one surface brushed, so it is preferably used as a shoe insole, a soundproof sheet, a floor sheet or an interior sheet, and has a good feel, In addition to showing high-grade feeling, excellent sound absorption, etc., it is also suitable as a wiping cloth by taking advantage of the absorption of dust etc. by brushing, all of which are quickly biodegraded by disposal after use and do not adversely affect the environment Composting is achieved in the same manner as in the case of the above-mentioned laminate. The felt laminate and the raised body of the present invention exhibiting the above-described excellent effects can be easily manufactured by the respective manufacturing methods of the present invention, using a conventional apparatus and without requiring special skills.

[Brief description of the drawings]

FIG. 1 is a side view showing one embodiment of a biodegradable felt laminate of the present invention.

FIG. 2 is a cross-sectional view of one layer (a biodegradable felt raised body) separated from the biodegradable felt laminate shown in FIG.

FIG. 3 is a cross-sectional view of a whiteboard eraser manufactured using the biodegradable felt laminate of the present invention shown in FIG.

FIG. 4 is a drawing showing a shoe insole made from the biodegradable felt laminate of the present invention, wherein (a) is a plan view thereof and (b).
Is a sectional view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Biodegradable felt laminated body 2 Biodegradable felt brushed body 3 White board eraser 4 Shoe insole R Brushed surface S Smooth surface

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroyuki Shirai 33-14 Funakoshi-cho, Hamamatsu-shi, Shizuoka Prefecture Chubu Shintokai Felt Co., Ltd. (72) Inventor Keiji Matsushita 33-14, Funakoshi-cho, Hamamatsu-shi, Shizuoka Prefecture F-term in Shintokai felt (reference)

Claims (6)

[Claims] 1. A felt laminate in which at least two felts made of biodegradable fibers are peelably joined to each other, wherein a felt and an adjacent felt appear by peeling them. A biodegradable felt laminate, characterized in that one of the surfaces is brushed and the other is joined so as to be relatively smooth. 2. The biodegradable felt laminate according to claim 1, which is used as a whiteboard eraser, shoe insole, floor sheet or wiping cloth. 3. A biodegradable felt raised body, wherein fibers on one surface of the felt made of biodegradable fibers are raised. 4. The biodegradable felt raised body according to claim 3, which is used as a shoe insole, a soundproof sheet, a floor sheet, an interior sheet or a wiping cloth. 5. The biodegradation according to claim 1, wherein a needle punch is pierced in only one side of the felt multilayer body formed by stacking at least two felts made of biodegradable fibers in the thickness direction of the multilayer body. A method for producing a conductive felt laminate. 6. A needle punch is pierced in only one side of the felt multilayer body in which at least two felts made of biodegradable fibers are stacked, and the felts are peeled off. 5. The method for producing a biodegradable felt raised body according to 3 or 4.