JP5390220B2 - tire - Google Patents

Description

  The present invention relates to a rubber composition in which the amount of a rubber component used is reduced and a tire using the rubber composition.

  Rubber compositions used for tires and the like contain a large amount of rubber components as raw materials. For example, in the case of a pneumatic tire for passenger cars using a rubber composition, 50% by mass or more of the rubber composition comprises natural rubber and synthetic rubber. It consists of a rubber component blended. Therefore, these rubber compositions and tires using the rubber compositions are affected by rising crude oil prices, rubber failure due to bad weather, etc., resulting in increased raw material costs and a difficult supply of stable products. There is a risk of becoming.

Moreover, in recent years, environmental problems tend to be emphasized globally. In particular, from the viewpoint of preventing global warming, regulations on CO ₂ emissions have been strengthened, and reductions in the use of petroleum resources have been demanded. The formation of a resource recycling society is required.

  Therefore, in order to reduce the amount of petroleum resources used when manufacturing tires, for example, Patent Document 1 describes a so-called eco-tire in which 75% by weight or more of the total weight is made of raw materials made of resources other than petroleum.

JP 2003-63206 A

  However, in the rubber composition and tire according to the above-mentioned conventional technology, although the amount of petroleum resources used can be reduced, the manufacturing process becomes complicated and the unit price of alternative raw materials for petroleum resources is high, so the manufacturing cost is not necessarily reduced. could not.

  In addition, there is room for improvement and selection of alternative raw materials from the viewpoint of high processing energy required for use (for example, energy required for crushing alternative raw materials) and high availability of alternative raw materials as fuel and resources. was there.

  Therefore, it is an alternative material that requires less processing energy when used and has low availability as a fuel / resource, etc., and greatly reduces the physical properties of the rubber composition even when blended instead of rubber. There has been a demand for a rubber composition that can be produced at a low cost, in which a compound that does not contain the above is blended.

An object of the present invention is to advantageously solve the above-mentioned problems, and the tire according to the present invention is a plant resource remaining after a solid component extraction is performed by immersing a plant resource in a solvent with respect to a rubber component. A tire composed of at least a part of a rubber composition containing an extraction residue, wherein the plant resource extraction residue has a water content of 80% by mass or less and a particle size of 0.02 to 600 μm. It is characterized by.
Thus, the usage-amount of the rubber component in a rubber composition can be reduced by mix | blending the residue which arises in the solid-liquid extraction process of a plant resource. Further, the residue generated after the extraction process of the plant resource is an inexpensive waste remaining after extracting the active ingredient from the plant resource that is a carbon neutral resource, and is therefore suitable as an alternative material for the rubber component. Therefore, the tire comprised from the rubber composition with low cost and low environmental load can be provided by blending the plant resource extraction residue with the rubber component. Here, solid-liquid extraction of a plant resource refers to extracting a desired component contained in a plant into a solvent by immersing the plant resource (solid) in a solvent, and optionally heating and stirring. It involves operations such as plant crushing and addition of extractants (chelating agents, acids, alkalis, etc.). In particular, from the viewpoint of ease of blending into a rubber composition, it is preferable to blend a residue remaining after solid-liquid extraction on a plant resource that has been crushed into a rubber component. The plant resource extraction residue refers to a residue that remains when a plant resource is immersed in a solvent to extract a desired component in the solvent, and then a solvent (extract) containing the component is separated by filtration or the like.
Moreover, if the moisture content of the plant resource extraction residue to be blended is 80% by mass or less, the plant resource extraction residue does not aggregate when blended with the rubber component, and the plant resource extraction residue is excellent in the rubber composition. Since it is dispersed, it is possible to provide a tire composed of a rubber composition in which physical properties such as elongation at break are not significantly reduced as compared with a rubber composition not using an alternative raw material. Here, the moisture content of the plant resource extraction residue may be 80% by mass or less from the viewpoint of preventing aggregation and improving dispersibility. However, the amount of energy necessary for reducing the moisture content, From the viewpoint of handling of the resource extraction residue, the content is preferably 5% by mass or more. The moisture content is a value calculated by evaporating the moisture of the plant resource extraction residue with a known heater (temperature 120 ° C.) and measuring the weight change before and after the evaporation with a known means such as a balance. .
Furthermore, if the particle size of the plant resource extraction residue to be blended is 0.02 to 600 μm, an increase in manufacturing cost and a decrease in physical properties of the rubber composition can be suppressed. When the particle size is less than 0.02 μm, the cost for pre-grinding is high, and when the particle size is more than 600 μm, the dispersibility in the rubber component is poor and the physical properties of the rubber composition are lowered and the plant resources are reduced. This is because the amount of energy required to reduce the moisture content of the extraction residue increases. The particle diameter is obtained by particle diameter measurement by laser diffraction (JISZ 8825-1), and is obtained by measuring the average of the major axis and the minor axis (taken as a sphere) of particles in the laser diffraction method. Value.
In addition, by configuring the portion of the conventional tire that is composed only of rubber with a rubber composition containing a plant resource extraction residue having a predetermined moisture content and particle size, the rubber is maintained while maintaining the performance as a tire. It is possible to provide a tire capable of reducing the environmental load by reducing the amount of components used.

In addition, the tire of the present invention is a rubber composition manufactured by a method of manufacturing a rubber composition by blending a plant resource extraction residue remaining after a solid-liquid extraction by immersing a plant resource in a solvent. A tire comprising at least a part of the tire , wherein the method for producing the rubber composition comprises a pulverization step of pulverizing the plant resource extraction residue to a particle size of 0.02 to 600 μm, and the plant resource extraction residue. It includes a moisture content adjusting step in which the moisture content is 80% by mass or less, and a kneading step in which the plant resource extraction residue that has been adjusted and pulverized is blended in a rubber component and kneaded. Thereby , a tire composed of a rubber composition as described above, which is inexpensive, has a low environmental burden, and does not significantly reduce physical properties such as elongation at break as compared with a rubber composition not using an alternative raw material. can get.
In addition, by configuring the portion of the conventional tire that is composed only of rubber with a rubber composition containing a plant resource extraction residue having a predetermined moisture content and particle size, the rubber is maintained while maintaining the performance as a tire. It is possible to provide a tire capable of reducing the environmental load by reducing the amount of components used.

Here, in the tire of the present invention described above, the method for producing the rubber composition preferably includes the pulverizing step before the moisture content adjusting step. In this way, when a rubber composition is produced by blending and kneading a plant resource extraction residue whose particle size has been reduced by pulverization to a predetermined moisture content and then blending and kneading it with the rubber component, the plant resource extraction residue will be granulated when adjusting the moisture content. This is because the water content of the plant resource extraction residue can be easily adjusted because the specific surface area is increased by being pulverized to a diameter of 0.02 to 600 μm. That is, the energy and time required for adjusting the moisture content of the plant resource extraction residue in producing the rubber composition can be greatly reduced.

In the tire of the present invention described above, the method for producing the rubber composition further includes a screening step in which the plant resource extraction residue is screened to screen residue and under-screen residue before the kneading step. It is preferable that the sieving residue is mixed with the rubber component and kneaded in the kneading step. In the tire of the present invention, it is more preferable that the method for producing the rubber composition includes the selecting step after the pulverizing step and before the moisture content adjusting step. This is because, if sieving is performed after the pulverization step, a plant resource extraction residue having a desired particle size can be easily selected. Further, the moisture content can be easily adjusted after pulverization and selection.

In addition, the tire of the present invention is a rubber composition manufactured by a method of manufacturing a rubber composition by blending a plant resource extraction residue remaining after a solid-liquid extraction by immersing a plant resource in a solvent. A tire comprising at least a part of the tire , wherein the method for producing the rubber composition has a moisture content adjusting step of adjusting the moisture content of the plant resource extraction residue to 80% by mass or less, and the moisture content is adjusted. A screening step including screening the plant resource extraction residue through a sieve having a mesh size of 600 μm or less to select an on-screen residue and an under-screen residue, and a kneading step of blending and kneading the under-screen residue with a rubber component. It is characterized by including. As a result , a tire composed of a rubber composition as described above is obtained that is inexpensive, has a low environmental impact, and does not significantly reduce physical properties such as elongation at break as compared with a rubber composition that does not use an alternative raw material. It is done.
In addition, by configuring the portion of the conventional tire that is composed only of rubber with a rubber composition containing a plant resource extraction residue having a predetermined moisture content and particle size, the rubber is maintained while maintaining the performance as a tire. It is possible to provide a tire capable of reducing the environmental load by reducing the amount of components used.

Furthermore, the tire of the present invention is a rubber composition manufactured by a method of manufacturing a rubber composition by blending a plant resource extraction residue remaining after a solid-liquid extraction by immersing a plant resource in a solvent. A tire comprising at least a part of the product, the plant resource extraction residue comprising a sieve having a mesh size of 600 μm or less and sorting the residue into an on-screen residue and an under-screen residue; It includes a moisture content adjusting step in which the moisture content of the lower residue is 80% by mass or less, and a kneading step in which the under-screen residue having the adjusted moisture content is blended with a rubber component and kneaded. As a result , a tire composed of a rubber composition as described above is obtained that is inexpensive, has a low environmental impact, and does not significantly reduce physical properties such as elongation at break as compared with a rubber composition that does not use an alternative raw material. It is done. Further, thereby, sieved and blended and kneaded into the rubber component after a small undersize residue particle sizes that have passed through the sieve as a predetermined moisture content in the manufactures rubber composition, adjusting the water content Since the plant resource extraction residue blended and kneaded with the rubber component has a small particle size and a large specific surface area, the water content of the plant resource extraction residue can be easily adjusted. That is, the energy and time required for adjusting the moisture content of the plant resource extraction residue in producing the rubber composition can be greatly reduced. In addition, when adjusting the particle size of the plant resource extraction residue to be blended by sieving, it is necessary to make the particle size of the plant resource extraction residue to be blended with the rubber component 0.02 μm or more from the viewpoint of the cost required for sieving. No.
In addition, by configuring the portion of the conventional tire that is composed only of rubber with a rubber composition containing a plant resource extraction residue having a predetermined moisture content and particle size, the rubber is maintained while maintaining the performance as a tire. It is possible to provide a tire capable of reducing the environmental load by reducing the amount of components used.

Here, it is preferable that the tire is used to sort the plant resource extraction residue using at least two sieves having different mesh sizes in the sorting step. This is because the plant resource extraction residue having a large particle size can be reliably selected and removed by sieving using sieves having different mesh sizes.

Specifically, in the tire , in the sorting step, the plant resource extraction residue is passed through a first sieve having a mesh size of 750 to 1500 μm, and the plant resource extraction residue that has passed through the first sieve is mesh size 90. And a step of passing through a second sieve of ˜600 μm. This is because a plant resource extraction residue having a desired particle size (for example, 600 μm or less) whose water content can be easily adjusted can be selected and blended.

Moreover, the tire of the present invention is dried after the moisture content adjusting step is a drying step in which the moisture content is 15% by mass or less by drying, a pressing step in which the moisture content is 80% by mass or less by pressing, or after being compressed. Therefore, it is preferable to be a pressing / drying step in which the moisture content is 15% by mass or less. In the case where the moisture content adjusting step is a drying step, the moisture content can be easily reduced to, for example, 15% by mass or less, and in the case of a pressing step, the moisture content can be reduced at a low cost. This is because in the case of a process, the water content can be easily reduced to, for example, 15% by mass or less at low cost.

Here, in the tire, it is preferable that the moisture content adjusting step is the drying step or the pressing / drying step, and drying is performed at a temperature of 130 to 250 ° C. By drying the plant resource extraction residue at a temperature of 130 to 250 ° C., for example, at a temperature higher than the boiling point of the filtrate when the plant resource extraction residue is filtered with a filtration device such as a stone mill system, a plant having a desired moisture content is obtained. This is because the resource extraction residue can be obtained quickly and the time required for producing the rubber composition can be shortened.

And in the tire of this invention mentioned above, it is preferable that the said solvent is water. This is because water has a smaller environmental impact than organic solvents. In addition, the residue remaining after subjecting plant resources such as plant leaves, seeds, and fruits to solid-liquid extraction using water as a solvent is that sugars such as glucose contained in the plant resources are eluted in the water, and lactic acid bacteria are This is because it is a waste that has hardly been treated by natural fermentation because it hardly exists, and the amount of waste can be reduced by reusing such a waste as a rubber composition. . In addition, as a plant resource which performs a solid-liquid extraction process with water, the plant containing catechin is preferable. This is because catechin-containing plants such as tea leaves are used as raw materials for beverages and the like, and the extraction residue of the catechin-containing plants is an inexpensive waste discharged in large quantities.

In the tire of the present invention described above, the plant resource is preferably tea leaves, the solvent is water, and the residue is tea husk. This is because tea husk is an inexpensive waste that is discharged in large quantities in the production process of tea-based beverages, and even when blended with a rubber composition as an extender, the elongation at break hardly decreases. In addition, it is preferable that the diameter of the plant cell wall in a tea husk is 0.02 micrometer-600 micrometers. This is because if the diameter of the plant cell wall in the tea husk is too small, handling is difficult, and if the diameter of the plant cell wall is too large, the dispersibility in the rubber component deteriorates without being mixed uniformly. In addition, the diameter of a plant cell wall is calculated | required by the particle diameter measurement (JISZ8825-1) by laser diffraction.

In the tire of the present invention described above, the plant resource may be coffee beans and the solvent may be water. The coffee cake remaining after making coffee from the coffee beans, which are the seeds of the coffee tree, is an inexpensive waste that is discharged in large quantities in the production process of coffee beverages, etc., so it is suitable as an alternative raw material for rubber components, By using such waste in the rubber composition, the amount of waste can be reduced. In addition, the rubber composition which mix | blended coffee lees can be used especially suitably for the tread part of a studless tire. The coffee gruel is a porous body with a pumice-like surface, and has a high ability to absorb moisture. If a rubber composition containing coffee gruel is used in the tread portion of the tire, it absorbs moisture and is absorbed on the tire ice. This is because the friction coefficient (μ on ice) can be improved.

Here, in the tire of the present invention, the coffee grinder preferably has a particle size of 0.02 μm to 600 μm. This is because handling is difficult when the particle size of the coffee candy is too small, and dispersibility in the rubber component is deteriorated without being uniformly mixed when the particle size of the coffee candy is too large.

In the tire of the present invention, the content of the plant resource extraction residue in the rubber composition is preferably 0.5 to 80% by mass, and more preferably 0.5 to 30% by mass. By setting the content of the plant resource extraction residue to 0.5% by mass or more, it is possible to sufficiently reduce the environmental load that is the object of the present invention. Moreover, the tire comprised with the rubber composition which has the performance equivalent to the rubber composition which does not use an alternative raw material by making content of a plant resource extraction residue into 80 mass% or less can be provided. Here, in this invention, content of a plant resource extraction residue refers to content of the solid content of a plant resource extraction residue. That is, when the content of the plant resource extraction residue is 0.5 to 80% by mass, the value obtained by dividing the mass of the plant resource extraction residue at a moisture content of 0% by the mass of the rubber composition is 0.005 to 0. .80.

According to the present invention, a tire using an environmentally friendly rubber composition that can be manufactured at a low cost without using a complicated manufacturing process by blending a predetermined alternative raw material with a rubber component is used as an alternative raw material. It can be provided without significantly reducing the physical properties as compared with a tire using a rubber composition that is not used. Moreover, the tire with the low environmental load at the time of manufacture using the rubber composition manufactured by the efficient manufacturing method of the said rubber composition can be provided.

It is sectional drawing of an example of the tire of this invention. (A)-(c) is a flowchart which shows the example of the procedure which adjusts the moisture content of a plant resource extraction residue.

<Rubber composition>
Below, the rubber composition of this invention is demonstrated in detail. The rubber composition according to the present invention is a plant resource extraction residue that remains after a solid-liquid extraction is performed by immersing the plant resource in a solvent, and a rubber component having a predetermined property is blended in the rubber component and kneaded, thereby It is characterized by reducing the amount of components used.

  Here, the rubber component is composed of rubber components such as natural rubber and synthetic rubber, and specific examples of the synthetic rubber include styrene-butadiene copolymer rubber (SBR), polybutadiene rubber (BR), and polyisoprene rubber ( IR), acrylonitrile-butadiene copolymer rubber (NBR), chloroprene rubber (CR), butyl rubber (IIR) and the like. The rubber composition of the present invention is optionally added to reinforcing fillers such as carbon black and silica, softeners such as aroma oil, vulcanization accelerators, vulcanization accelerators, anti-aging agents, etc. Additive may be included.

  The plant resource may be a part of a plant containing any active ingredient that can be extracted by an extraction operation. Examples of plant resources include tea leaves, coffee beans, aloe leaves, mugwort leaves, and mulberry leaves. Roots, red grape skin, thistle seeds, tomorrow leaves, acerola, chlorella, kudzu roots (knot roots), rose flowers, peach leaves, buckwheat, barley seeds. In addition, it is preferable to use these plant resources for extraction operation, after crushing with a crusher etc., in order to improve the efficiency of extraction operation | work.

  The solvent used for extraction can be selected according to the type of plant resource, desired active ingredient, and use of the extract. For example, water or an organic solvent (ethyl alcohol, oil, etc.) can be used as the solvent. . And a drink, a lotion, an emulsion, etc. can be obtained by immersing the plant resource mentioned above in these solvents, and extracting the active ingredient in a plant resource. In addition, you may mix and use extractants, such as a chelating agent, an acid, and an alkali, as needed.

  The plant resource extraction residue is a means such as filtration after immersing the plant resource in a solvent and optionally extracting the desired components contained in the plant by performing operations such as heating and stirring. Refers to the solid component remaining when the extract (solvent) is separated.

  And the plant resource extraction residue mentioned above is mix | blended with a rubber composition as the moisture content is 80 mass% or less, Preferably it is 30 mass% or less, More preferably, it is 15 mass% or less. Here, the moisture content of the plant resource extraction residue can be adjusted using a known method such as drying such as hot air drying, drum drying, and hot plate drying, and pressing such as a filter press. When the water content of the plant resource extraction residue remaining when the solvent is separated is in the desired water content range, it may be blended directly into the rubber component without adjusting the water content.

  In addition, as temperature at the time of drying a plant resource extraction residue and adjusting a moisture content, from a viewpoint of workability, 130-250 degreeC is preferable, and when a plant resource extraction residue is filtered with filtration apparatuses, such as a stone mill system, A temperature higher than the boiling point of the filtrate is more preferred.

  Further, the above-mentioned plant resource extraction residue can have a particle size of 0.02 to 600 μm from the viewpoints of blendability into a rubber component and ease of adjustment of water content. Therefore, for plant resource extraction residues containing residues having a particle size larger than 600 μm, as shown in, for example, FIGS. 2 (a) to (c), it is optionally necessary after sieving, pulverizing, or both. Accordingly, the water content can be adjusted (squeezed and dried) and then blended into the rubber component. Here, when crushing or adjusting the moisture content after sieving, the crushing and moisture content adjustment are performed on the residue under the sieve. The moisture content may be adjusted before pulverization or sieving. Moreover, you may further grind | pulverize and sieve the plant resource extraction residue (water content adjustment residue) which adjusted the water content as needed. Incidentally, when adjusting the particle size of the plant resource extraction residue mix | blended with a rubber component by sieving, the plant resource extraction residue mix | blended may contain a residue with a particle size of less than 0.02 micrometer. This is because when the plant resource extraction residue having a particle size of less than 0.02 μm is separated by sieving, the number of times the residue is sieved increases.

  Specifically, for example, the plant resource extraction residue having a desired particle size is obtained by pulverizing the plant resource extraction residue with a known wet pulverizer or by sieving the plant resource extraction residue with a known wet sieve. Thus, the water content of the plant resource extraction residue can be adjusted and blended with the rubber component. Here, since the plant resource extraction residue remaining on the sieve becomes waste in sieving, pulverization is preferred as a method for adjusting the particle size of the plant resource extraction residue to be blended with the rubber component. In addition, sieving is performed in multiple times using sieves with different mesh sizes in order to reliably obtain a plant resource extraction residue having a desired particle size, or as the sieves with different mesh sizes are moved downward. It can implement using what was piled up so that it might become a sieve with a small mesh size.

  The rubber composition of the present invention is obtained by converting a plant resource extraction residue that has been pulverized or sieved by the above-described method and subsequently adjusted the moisture content into a rubber component together with an optional filler (carbon black, etc.) and additives. It can be prepared by blending and kneading. In addition, there is no restriction | limiting in particular in the preparation method of the rubber composition of this invention, For example, a banbury mixer, a roll, etc. are used for a rubber component, plant resource extraction residue, and various compounding agents selected suitably as needed. It can be prepared by kneading.

<Tire>
The tire of the present invention is characterized in that at least a part thereof is composed of the rubber composition, and other than that, it can be manufactured using the same manufacturing method as that of a normal tire.

  Next, the tire of the present invention will be described in detail with reference to the drawings. FIG. 1 is a cross-sectional view of an example of the tire of the present invention. The tire shown in FIG. 1 has a pair of bead portions 1, a pair of sidewall portions 2, and a tread portion 3 connected to both sidewall portions 2, and extends in a toroid shape between the pair of bead portions 1. The carcass 4 that reinforces the parts 1, 2, and 3 and the belt 5 that is located on the outer side in the tire radial direction of the crown portion of the carcass 4 are provided.

  In the illustrated tire, the carcass 4 is composed of a single carcass ply, and a main body portion extending in a toroidal shape between a pair of bead cores (wires) 6 respectively disposed in the bead portion 1; Around the bead core 6, it consists of a folded portion wound up radially outward from the inside in the tire width direction toward the outside. In the illustrated example, the carcass 4 is composed of one carcass ply. However, in the tire of the present invention, a plurality of carcass plies may be provided.

  In the illustrated tire, the belt 5 is composed of two belt layers. However, in the tire of the present invention, the number of belt layers constituting the belt may be one or more, and is not limited thereto. Absent. Furthermore, the tire of the present invention may further include a belt reinforcing layer made of a rubberized layer of cords arranged substantially parallel to the tire circumferential direction on the outer side in the tire radial direction of the belt 5. Further, an interlayer rubber can be provided between the belt reinforcing layer and the belt reinforcing layer.

  And the tire of the example of illustration uses the rubber composition which mix | blended coffee lees as the plant resource extraction residue mentioned above at least in the tread part 3. By using a rubber composition blended with coffee lees in the tread portion 3, a tire with improved on-ice μ can be provided.

  In addition to the examples described above, for example, a tire may be configured using a rubber composition containing tea husk as a plant resource extraction residue. If the tea husk is used as an extender, the amount of rubber component used can be reduced without substantially reducing the elongation at break.

  Examples of the member using the rubber composition include tread rubber, side rubber, bead filler or stiffener located on the radially outer side of the bead wire, carcass and belt coating rubber, and the like.

  In addition, as a gas filled in the tire of the present invention, an inert gas such as nitrogen, argon, helium, etc. can be used in addition to air having a normal or oxygen partial pressure adjusted.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the present invention is not limited to the following examples.

(Examples 1-4)
Using a Banbury mixer, preparing a rubber composition containing tea husks with the formulation shown in Table 1, blending a known vulcanizing agent, etc. and vulcanizing by a normal method, then measuring the elongation at break by the following method, evaluated. The results are shown in Table 1.

(Examples 5 to 8)
Using a Banbury mixer, prepare a rubber composition containing coffee gruel with the formulation shown in Table 1, blend with a known vulcanizing agent, etc., and vulcanize by the usual method, then measure the elongation at break by the following method ,evaluated. The results are shown in Table 1.

(Conventional example 1)
Use a Banbury mixer to prepare a rubber composition that does not contain coffee candy and tea husks with the formulation shown in Table 1, blend with a known vulcanizing agent, etc., and vulcanize it in the usual way, then break it with the following method. Elongation was measured and evaluated. The results are shown in Table 1.

(Comparative Example 1)
An attempt was made to prepare a rubber composition containing a plant resource extraction residue (tea husk or coffee cake) having a moisture content of more than 90% by mass using a roll, but the roll slipped and the rubber component and the plant resource extraction residue Kneading was not possible. Therefore, the elongation at break could not be measured.

(Elongation at break)
For the vulcanized rubber obtained by vulcanizing the rubber compositions prepared in Examples 1 to 8 and Conventional Example 1 at 160 ° C. for 15 minutes, using a strograph manufactured by Toyo Seiki Seisakusho Co., Ltd., a temperature of 25 ° C., The elongation at break was measured under the condition of a tensile speed of 100 mm / min.

* 1 Emulsion polymerization SBR, 37.5 parts by mass of aroma oil for 100 parts by mass of rubber component
* 2 N110 manufactured by Asahi Carbon Co., Ltd.
* 3 Tea leaves discharged from beverage manufacturing plants
* 4 Coffee cake discharged from a beverage manufacturing plant

  From Table 1, if a plant resource extraction residue having a predetermined property is blended with a rubber component to form a rubber composition, it is possible to reduce the amount of the rubber component used without reducing elongation at break. I understand.

1 Bead part 2 Side wall part 3 Tread part 4 Carcass 5 Belt 6 Bead core

Claims (15)

A rubber composition containing a plant resource extraction residue remaining after performing solid-liquid extraction by immersing a plant resource in a solvent, and a rubber component , comprising at least a part of a tire ,
A tire having a moisture content of the plant resource extraction residue of 80% by mass or less and a particle size of 0.02 to 600 μm. The tire according to claim 1, wherein the solvent is water. The tire according to claim 2, wherein the plant resource is a plant containing catechin. The tire according to claim 2, wherein the plant resource is coffee beans. The tire according to claim 1, wherein the content of the plant resource extraction residue is 0.5 to 80% by mass. A rubber composition manufactured by a method of manufacturing a rubber composition by blending a plant resource extraction residue remaining after solid-liquid extraction by immersing a plant resource in a solvent with respect to the rubber component , at least partly constituting Tire ,
A method for producing the rubber composition comprises:
Crushing step of crushing the plant resource extraction residue to a particle size of 0.02 to 600 μm;
A moisture content adjusting step in which the moisture content of the plant resource extraction residue is 80% by mass or less;
A kneading step of mixing and kneading the plant resource extraction residue that has been adjusted and pulverized with a rubber component;
A tire characterized by including. The tire according to claim 6 , wherein the method for producing the rubber composition includes the pulverizing step before the moisture content adjusting step. The method for producing the rubber composition further includes a screening step of screening the plant resource extraction residue through a sieve to screen residue and under-screen residue before the kneading step,
The tire according to claim 6, wherein in the kneading step, the under-screen residue is blended with a rubber component and kneaded. The tire according to claim 8 , wherein the method for producing the rubber composition includes the selecting step after the pulverizing step and before the moisture content adjusting step. A rubber composition manufactured by a method of manufacturing a rubber composition by blending a plant resource extraction residue remaining after solid-liquid extraction by immersing a plant resource in a solvent with respect to the rubber component , at least partly constituting Tire ,
A method for producing the rubber composition comprises:
A moisture content adjusting step in which the moisture content of the plant resource extraction residue is 80% by mass or less;
A screening step including screening the plant resource extraction residue adjusted in moisture content to a residue on the screen and a residue on the screen by passing through a sieve having a mesh size of 600 μm or less;
A kneading step of blending and kneading the sieving residue with a rubber component;
A tire characterized by including. A rubber composition manufactured by a method of manufacturing a rubber composition by blending a plant resource extraction residue remaining after solid-liquid extraction by immersing a plant resource in a solvent with respect to the rubber component , at least partly constituting Tire ,
A method for producing the rubber composition comprises:
A screening step comprising screening the plant resource extraction residue through a sieve having a mesh size of 600 μm or less to screen residue and screen residue;
A moisture content adjusting step in which the moisture content of the residue under the sieve is 80% by mass or less;
A kneading step of blending and kneading the sieving residue with the moisture content adjusted to a rubber component;
A tire characterized by including. The tire according to claim 10 or 11, wherein in the sorting step, the plant resource extraction residue is sorted using at least two sieves having different mesh sizes. The sorting step is
Applying the plant resource extraction residue to a first sieve having a mesh size of 750 to 1500 μm;
Applying the plant resource extraction residue that has passed through the first sieve to a second sieve having a mesh size of 90 to 600 μm;
The tire according to claim 10 or 11, comprising: The moisture content adjusting step is a drying step in which the moisture content is 15% by mass or less by drying, a pressing step in which the moisture content is 80% by mass or less by pressing, or a moisture content of 15% by mass or less by drying after pressing. The tire according to any one of claims 6 to 13, which is a pressing / drying step. The moisture content adjusting step is the drying step or the pressing / drying step,
The tire according to claim 14, wherein drying is performed at a temperature of 130 to 250 ° C.

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