JP2000281917A - Composition, molded article and packaging material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide packaging materials and the like capable of reducing industrial wastes by disposing a large amount of extraction residues of natural organic substances produced by extracting necessary components from natural organic substances. SOLUTION: Packaging materials such as food trays containing extraction residues of natural organic substances such as used tea leaves and coffee extraction residues are formed. Since the packaging materials contain extraction residues of natural organic substances, a large amount of waste materials can be disposed by molding packaging materials to reduce the generation of industrial wastes. Further, it is possible to allow packaging materials to have properties such as deodorizing properties and preservation of freshness which the extraction residues of natural organic substances possess.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composition, a molded article thereof, and a packaging material obtained by further molding and processing the molded article. It can be used to recycle tea husks, coffee extraction residues, etc. generated as products.

[0002]

BACKGROUND ART With the expansion of the beverage industry in recent years, various kinds of drinks such as tea and coffee have been sold. With the rapid increase in production, a large amount of tea husks and coffee extraction residues, which are residues after extraction, have been produced. Has occurred. Extraction residues of such various beverages are handled as industrial waste,
Conventionally, it has been treated by incineration, landfill, or the like.

[0003] However, in the case of incineration, the extraction residue having a high water content lowers the flammability during incineration.
There is a problem that incineration efficiency deteriorates. Further, in the case of landfill processing, there is a problem that it is necessary to consider environmental issues such as a decrease in landfill sites. For this reason, as with other industrial wastes such as home electric appliances, attempts have been made to reduce the amount of industrial waste by reusing such extracted residues such as tea husks and coffee extraction residues.

[0004] For example, in tea, the production volume of which has recently been particularly increasing, a deodorant utilizing the deodorizing effect of components such as polyphenols (Japanese Patent Application Laid-Open No. 6-26948), and a blood pressure lowering effect of the fiber of the extraction residue. Serum neutral fat concentration reducing agent (JP-A-6-287145), pet litter using the water absorption and deodorizing properties of dried extract residue (JP-A-7-203793), and others Various methods have been proposed to reduce industrial waste by reusing extraction residues, such as those used as organic compost.

[0005]

However, most of the above-mentioned reusable applications are used alone for extraction residues such as chemicals, feed, compost, etc., and the amount of tea husks generated in large quantities is limited due to the limited amount of processing. It is difficult to treat all extraction residues such as. Therefore, there is an urgent need for a reusable use in which such an extraction residue can be processed in a larger amount.

[0006] It is an object of the present invention to provide a composition, a molded article, and a packaging material capable of treating a large amount of a natural organic matter extraction residue obtained by extracting necessary components from a natural organic matter to reduce industrial waste. It is in.

[0007]

Means for Solving the Problems To achieve the above object, a composition according to the present invention is characterized by comprising a natural organic matter extraction residue obtained by extracting necessary components from natural organic matter. Here, as a natural organic matter extraction residue obtained by extracting necessary components from the above-mentioned natural organic matter, for example, tea (green tea, oolong tea, etc.), coffee, black tea, etc., in the production of canned beverages, bottled beverages, etc. Residues, such as tea husks and coffee extraction residues, can be employed.

Further, in order to constitute the composition, a binder-like material for binding natural organic matter extraction residues to each other is required. For example, an inorganic binder such as cement, an organic binder such as thermoplastic resin, etc. Can be mixed with the natural organic matter extraction residue to form a composition. further,
The composition is a concept that includes not only the final product that has been formed and processed, but also processed materials and the like that are raw materials during secondary processing.

According to the present invention, since the composition contains a natural organic matter extraction residue, it is possible to treat a large amount of tea husks, coffee extraction residue, and the like by producing the composition. Industrial waste can be reduced. In addition, by including the above-mentioned natural organic matter extraction residue in the composition, it becomes possible to impart the characteristics of the natural organic matter extraction residue to the composition. For example, by forming a composition including tea husks, it is possible to impart the properties such as the deodorizing property of tea husks and the freshness retaining property of the tea husks, thereby expanding the use of the composition and reducing industrial waste. Can be further promoted.

[0010] In the above, it is preferable that the above-mentioned natural organic matter extraction residue is finely pulverized to an average particle size of 300 µm or less. Here, the pulverization of the natural organic matter extraction residue can be performed using various pulverizers, for example, pulverization using a ball mill, a jet mill, a screen mill, or a combination thereof. Pulverization by a screen mill in the method of pulverizing a thermosetting resin disclosed in US Pat. This screen mill is a device for pulverizing waste urethane foam, and can pulverize natural organic matter extraction residues such as tea leaves as raw materials in the present invention at low cost.

That is, since the natural organic matter extraction residue is pulverized to an average particle diameter of 300 μm or less, it can be easily mixed with other binder materials, and the natural organic matter extraction residue is uniformly dispersed in the composition. And a homogeneous composition can be obtained. In addition, by finely pulverizing the natural organic matter extraction residue in this manner, the background color of the natural organic matter extraction residue is less likely to appear, and the color tone of the composition is changed by further adding a coloring agent or the like, whereby the composition is changed. Uses of products are further expanded.

As the binder material to be mixed with the above-mentioned natural organic matter extraction residue, it is preferable to use an organic binder, for example, a thermosetting resin, a thermoplastic resin, and a biodegradable resin. Can be adopted. Specifically, examples of the thermosetting resin include a urethane resin, an epoxy resin, a phenol resin, and a urea (urea) resin. Examples of the thermoplastic resin include vinyl chloride resin, olefin resin, styrene resin, urethane resin, and acrylic resin.

When a thermoplastic resin is used, it is preferable to use an olefin resin. Examples of the olefin resin include polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA),
Thermoplastic polyolefin-based elastomer (TPO) and the like can be mentioned. Further, as the polyethylene, low-density polyethylene (LDPE) produced by a high-pressure method, high-density polyethylene (HDPE) produced using a Ziegler-Natta catalyst, and ethylene and α -Linear low density polyethylene (LLDP) produced by copolymerizing olefin
E) and the like.

As the polypropylene, a highly stereoregular polypropylene having an isotacticity of 95% or more, for example, an isotactic polypropylene in the first stage, and a copolymer of propylene and ethylene in the second stage are obtained. Block type polypropylene and the like.

A biodegradable resin is used as a binder material,
When a so-called biodegradable plastic is used, various types of biodegradable plastics such as a microorganism-producing polymer type, a natural polymer type, and a chemically synthesized polymer type can be used. Microbial-produced high-molecular-weight biodegradable plastics were produced by fermenting these microorganisms under optimal conditions, based on the knowledge that there are many microorganisms that produce polyester as an energy storage substance in nature. Things. Specifically, polyhydroxybutyrate (PH) is used as a biodegradable plastic of a microbial polymer type.
B), a copolymer of polyhydroxybutyrate and hydroxyvalerate (PHB / PHV), and the like.

The biodegradable plastic of the natural polymer type is
It is a chemical treatment of a natural polymer material. Specific examples include those obtained by subjecting natural polymer materials such as starch, cellulose, and chitin to chemical treatment in terms of strength and water resistance.

The biodegradable plastic of the chemically synthesized polymer type is an aliphatic polyester among the chemically synthesized polymers.
Focusing on the fact that there are substances that are easily degraded by microorganisms, these polymers are chemically synthesized. Specific examples include polycaprolactone (PCL), polylactide acid (PLA), and polybutylene succinate (PSUU).

The above-mentioned thermoplastic resin and natural organic matter extraction residue can be set to any mixing ratio within a range that can maintain a predetermined shape. The composition is effective in reducing industrial waste and easily imparts the characteristics of natural organic matter extraction residue to the composition.

That is, by employing an organic binder as the binder material, the composition can be formed into various shapes. In particular, when a thermoplastic resin is employed, it is possible to meet the demands for packaging materials such as trays. It becomes possible to form into a finished product shape. In addition, by forming a composition with such a natural organic matter extraction residue, the natural organic matter extraction residue at the time of disposal will decompose in the soil, so that a composition having excellent decomposability at the time of disposal can be obtained. Become.

Furthermore, by adopting an olefin resin, there are few components which lead to environmental pollution, such as a vinyl chloride resin, and it is taken up as a resin suitable for environmental protection, and is suitable as a raw material for recycling. is there. In addition, since olefin resins are most commonly used, there is a possibility that they can be used for various purposes. And the composition is composed of a natural organic matter extraction residue and a biodegradable plastic, or a natural organic matter extraction residue and a thermoplastic resin and a biodegradable plastic. Since it is decomposed in the soil, the decomposability of the composition at the time of disposal is further improved.

As the molded article obtained by molding the above-described composition, molded articles of various shapes such as pellets and sheets can be employed. Extrusion molding, blow molding, calendar molding, and the like can be adopted as long as the molded product is a sheet-like molded product.

By forming such a molded article, the composition can be used as a raw material for various molding methods. That is, if it is a pellet-shaped molded product, it can be used as a raw material of an extrusion molding machine, an injection molding machine, or the like, and if it is a sheet-shaped molded product, it can be used as a raw material for vacuum molding or the like, By performing these secondary processes, packaging materials of various shapes such as trays can be formed, and the use of the composition is further expanded.

As the use of the final product obtained by subjecting the above-mentioned molded product to secondary processing, specifically, the following can be considered. (1) Packaging materials include trays, guesses, containers,
It can be used for bags and food packaging sheets.

(2) In the field of agricultural products, it can be used for agricultural films, vegetation sheets, seedling pots, pots, seed strings, and the like. (3) In the field of fisheries, it can be used for fishing nets, fishing lines, and cultured sponges. (4) Other possible uses include a disposable filter for brewing coffee and the like, a golf tee and the like.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. (1) Pulverization of Natural Organic Matter Extraction Residue The natural organic matter extraction residue was screened by a screen mill constituting the second step in the third embodiment of the pulverization method disclosed in Japanese Patent Application No. 10-169827 filed by the present applicant. By using it, it can be crushed.

That is, as shown in FIGS. 1 and 2, the screen mill 10 includes a cylindrical main body 11 and a rotating cylindrical body 12 provided in the cylindrical main body 11. The cylindrical main body 11 has a raw material input section 13 formed on one side and a pulverized material discharge section 14 formed on the other side. A screen 15 is provided between the cylindrical main body 11 and the discharge section 14. The rotating cylindrical body 12 has a support portion 1 having a central rotating shaft 16 having ball bearings at both ends.
7 supported. The lower rotating shaft 16 is the shaft coupling 1.
8 is connected to a motor (not shown). On the cylindrical surface 19 of the rotary cylindrical body 12, a plurality of convex rotary blades 20 are formed at regular intervals in the vertical direction.

On the other hand, inside the cylindrical main body 11, a plurality of convex fixed blades 21 are formed in a vertical direction at an intermediate position between the charging section 13 and the discharging section 14. These rotary blades 20
The clearance between the fixed blade 21 and the fixed blade 21 can be adjusted according to the required average particle size of the fine powder.
mm or less, preferably 0.1 mm or less.

When the natural organic matter extraction residue such as tea leaves is pulverized by the above-mentioned screen mill 10, the natural organic matter extraction residue whose water content has been adjusted to about 15% in the previous step is removed.
The natural organic matter extraction residue is pulverized by charging the raw material into the charging section 13 while operating the screen mill 10. In addition, when the shape of the natural organic matter extraction residue as a raw material is large and varies, it is preferable to carry out coarse pulverization in the previous step, and as the feed of the screen mill 10, the particle size of the residue is approximately 2, It is better to adjust it to 000 μm or less.
When the water content of the natural organic matter extraction residue is 15% or more, the water content may be reduced by using a dryer used in a drying step described later. The natural organic matter extraction residue has an average particle size of 30 by this screen mill 10.
It is pulverized to a fine powder of 0 μm or less.

(2) Drying of natural organic matter extraction residue The natural organic matter extraction residue, which has been pulverized by the screen mill 10 and has an average particle size of 300 μm or less, is dried by a drier to obtain a predetermined water content in the next step. Is sent to the kneading process. Drying is performed in an atmosphere of about 105 ° C. for about 24 hours.
It can be carried out with a general dryer or a fluidized dryer that cures. Preferably, a flash dryer using high-pressure hot air (for example, a flash jet dryer: Seishin Enterprise) is used to wet the natural organic matter extraction residue. The rate is about 4.0
% Or less. If the water content of the natural organic matter extraction residue is 4.0% or more, lumps may be generated at the time of kneading with a binder resin described later, or foaming may occur during kneading.

(3) Kneading, Sheeting, and Forming of Natural Organic Extraction Residue and Binder Resin The natural organic matter extraction residue produced by the screen mill 10 is kneaded with a binder resin, then formed into a sheet, molded and processed. It is used for applications. As the binder resin, various properties of a thermosetting resin and a thermoplastic resin can be adopted. In the case of the present embodiment, the thermoplastic resin is adopted. As the thermoplastic resin, an olefin resin or a styrene resin is preferably used, and specifically, polypropylene (PP), polyethylene (PE), and polystyrene (PS) are used.

As the binder resin, a biodegradable plastic of a microorganism-producing polymer type, a natural polymer type, or a chemically synthesized polymer type can be employed. Specifically, examples of the biodegradable plastic of the microorganism-producing polymer type include PHB and PHB / HV. Examples of natural polymer type biodegradable plastics include those obtained by subjecting cellulose, chitin, and the like to chemical treatment to improve strength and water resistance. Furthermore, as biodegradable plastics of chemically synthesized polymer type, PCL, PL
A, PBSU and the like.

Various methods can be adopted for sheeting and forming according to the shape of the final product and the like. For example, when a tray is manufactured, the following procedure is used. When molding a tray, first, a mixture of a fine powder of natural organic matter and a binder resin is formed into a sheet, followed by vacuum forming,
It is formed by pressure forming or the like.

The kneading of the natural organic matter extraction residue and the binder resin can be carried out in a kneading section of various known molding machines, processed into various shapes such as pellets, sheets and the like for secondary processing. Raw material. Examples of the molding machine that can be formed into a sheet include a two-roll machine, an extrusion molding machine, a blow molding machine, an injection molding machine, and a calender molding machine. In addition, as a molding machine that can be formed into a pellet, there is an extrusion molding machine and the like.

The blending ratio of the natural organic matter extraction residue and the binder resin varies depending on the type of the binder resin. For example, when HDPE is employed as the binder resin, the weight ratio of HDPE / natural organic matter extraction residue = 90/10 to 5
If it is in the range of 0/50, it can be blended without any problem, and becomes a raw material having suitability for secondary processing. By further blending another resin or the like, more natural organic matter extraction residues can be blended, and the decomposability of the molded article in soil at the time of disposal is improved, which is also preferable from the viewpoint of environmental protection. Further, additives such as a coloring agent, a weathering agent, an antioxidant and the like are added to these mixtures as necessary, and the color tone, durability and the like of the composition are adjusted.

The sheet-like molded product is packaged in a tray or the like by a known molding machine capable of processing the sheet-like material to be processed, for example, a thermoforming machine such as a vacuum forming machine or a pressure forming machine, or a compression molding machine. Formed into material. When molding with a thermoforming machine, it is important to soften the sheet at a temperature at which the natural organic fine powder does not deteriorate.

Even when a molded product other than a tray is molded from the natural organic matter extraction residue and the binder resin, a molding method most suitable for each molded product can be adopted. For example, when molding a foam, a mixture obtained by kneading a natural organic matter extraction residue and a binder resin, and water, a gas foaming agent, and a chemical foaming agent, which are volatile foaming agents, are put into an extruder as raw materials, and a sizing die is used. By extruding from, an extruded foam having a shape suitable for various uses can be formed.

According to the above-described embodiment, the following effects can be obtained. That is, since the tray contains natural organic matter extraction residues, by producing the composition, tea husks, coffee extraction residues, and the like can be processed in large amounts, and the generation of industrial waste can be significantly reduced. it can.

When the tray is a food tray, the characteristics of the natural organic substance extraction residue can be imparted to the tray by including the above-mentioned natural organic substance extraction residue. For example, by forming a food tray including tea husks, the food trays can have the properties such as deodorant and freshness possessed by the tea husks, thereby expanding applications and reducing industrial waste. Can be further promoted.

Furthermore, the natural organic matter extraction residue has an average particle size of 3
Since the powder is pulverized to a size of not more than 00 μm, it can be easily mixed with other binder materials, and the natural organic matter extraction residue can be uniformly dispersed in the composition to form a homogeneous tray. Further, by finely pulverizing the natural organic matter extraction residue in this way, the natural color of the natural organic matter extraction residue is less likely to have a ground color. The use of is further expanded.

Since the composition is composed of a natural organic matter extraction residue and a thermoplastic resin, various shapes of trays can be formed by vacuum forming, compression molding, or the like as required. Further, since the tray contains the natural organic matter extraction residue, the natural organic matter extraction residue is decomposed in the soil when the tray is discarded, and the tray can be excellent in degradability at the time of disposal, which is also preferable from the viewpoint of environmental protection. .

Furthermore, when an olefin resin is used as the binder resin, it has few components that lead to environmental pollution, such as a vinyl chloride resin, and is taken up as a resin suitable for environmental protection. It is suitable. In addition, since olefin resins are most commonly used, there is a possibility that they can be used for various purposes. When a biodegradable plastic is used as the binder resin, not only the residue of natural organic matter extraction but also the biodegradable plastic is decomposed in the soil. More preferred above.

Further, the composition containing the above-mentioned residue of natural organic matter extraction is processed into a pellet-shaped or sheet-shaped molded product, and this composition is used as a raw material for an injection molding machine, an extrusion molding machine, a vacuum molding machine and the like. The natural organic matter extraction residue can be used for a wider use by being subjected to secondary processing into various molded articles.

It should be noted that the present invention is not limited to the above embodiment, but includes the following modifications. That is, in the above embodiment, the screen mill 10
Was used to pulverize natural organic matter residues such as tea husks, but is not limited to this.In accordance with the average particle size of the required fine powder, a ball mill, a jet mill, a pin mill, and various other known pulverizers are used. Pulverization may be achieved, or pulverization may be performed in multiple stages by combining a pulverizer.

Further, in the above-described embodiment, the color is adjusted by adding a coloring agent to the mixture of the natural organic matter extraction residue and the binder resin. However, the present invention is not limited to this. That is, if a problem occurs in the color tone due to the powder color of the natural organic substance extraction residue, a composition containing no natural organic substance extraction residue is laminated on the surface of a tray or the like to form a tray of a desired color. You may.

In the above-described embodiment, only the tray and the foam are illustrated as molded articles, but the present invention is not limited to this. That is, the composition and the molded article according to the present invention may be used as a raw material for an agricultural film, a vegetation sheet, a nursery pot, and the like used in the agricultural field. In addition, specific structures, shapes, and the like at the time of carrying out the present invention may be other structures and the like as long as the object of the present invention can be achieved.

[0046]

EXAMPLES (Example 1) A food tray was prepared according to the following procedure. First, a screen mill 10 (Robot Shifter RP manufactured by Seishin Enterprise) shown in FIGS.
The tea husk is pulverized using S-85). The average particle size, water content, and bulk density of the tea husks before and after the pulverization are as shown in Table 1. The water content was measured using an infrared moisture meter at 120 ° C and 10 ° C.
It is measured under the condition of minutes. The bulk density is measured with a Kawakita static bulk density meter.

[0047]

[Table 1]

Next, the natural organic substance fine powder obtained by the screen mill 10 was dried by a drier at 105 ° C. and 24 hours, and the moisture content of the natural organic substance fine powder was about 4.
It dropped to 0%. Further, a dried natural organic fine powder and a binder resin were kneaded to form a sheet.

As the binder resin, high density polyethylene (HDPE Idemitsu # 520M manufactured by Idemitsu Petrochemical Co., Ltd.)
B and light emission # 440M mixed at 70:30) to which stabilizers such as antioxidants and light stabilizers are added as necessary. The mixing ratio of the natural organic matter fine powder and the binder resin is such that the weight ratio is HDPE / natural organic matter fine powder = 100/0, 90/10, 80/20, 60 /
Six levels of 40, 50/50 and 40/60 were taken.

The mixture at each mixing ratio was formed into a sheet using two rolls to produce a sheet having a sheet thickness of about 0.5 mm, and the sheet was formed into a food tray by vacuum forming. The moldability, the tray moldability by vacuum forming, the freshness retention of the obtained food tray, and the deodorizing property were evaluated. Two rolls in kneading and sheeting, the temperature of the front roll is 160 ℃,
The operation is performed by adjusting the temperature of the back roll to 150 ° C. Further, after heating at a temperature of 180 ° C. for 5 seconds, vacuum forming is performed to form a food tray. Table 2 shows the evaluation results.

In the evaluation of freshness retention in Table 2, commercially available chickens were placed on trays of each mixing ratio, sealed with plastic wrap, left in a refrigerator, and visually evaluated for the degree of discoloration due to decay. ×: discolored on day 4, Δ: discolored on day 6, o:
On the 8th day, the color changed. In addition, the evaluation of deodorant properties was performed by performing a sensory test with five persons on the state of off-flavor generation on the 6th day under the above-mentioned conditions and ranking the results. ×: Strong odor, Δ: Weak but clear off-flavor, ：: Slightly present.

[0052]

[Table 2]

As can be seen from Table 2, when the compounding ratio of the natural organic matter extraction residue exceeds 50% by weight, the roll formability and the tray formability deteriorate, and at 60% by weight, almost no forming is possible. The decrease in the roll formability is caused by the decrease in the adhesiveness with the roll, and the decrease in the adhesiveness with the roll indicates that the resin properties of HDPE as the binder resin are lost. it is conceivable that. Further, in terms of freshness retention and deodorant properties, it was confirmed that when the compounding ratio of the natural organic matter extraction residue was 20 wt% or more, these properties were improved.

Example 2 A natural organic matter extraction residue prepared in the same manner as in Example 1 was mixed with a biodegradable resin, and a 5 mm-thick sheet piece was formed with two rolls. As the biodegradable resin, Cell Green Grade PH7 (manufactured by Daicel Chemical Industries, Ltd.) is employed, and the blending ratio of the natural organic matter extraction residue and the biodegradable resin is cell green / extraction residue = weight ratio =
Three levels of 100/0, 80/20 and 60/40 were taken. The molding with two rolls is performed under the conditions of a front roll of 130 ° C. and a back roll of 120 ° C.

(Comparative Example 1) In Example 2, the biodegradable resin was changed to HDPE as in Example 1, and a sheet piece was produced under the same conditions. The blending ratio of the natural organic matter extraction residue and HDPE is HDPE / extraction residue = 1 by weight.
Two levels of 00: 0 and 60:40 were taken.

Each sheet piece cut into a 5 cm square obtained in Example 2 and Comparative Example 1 was embedded in soil, and two months later,
After 4 months and 6 months, the biodegradability was evaluated. Table 3 shows the results. In addition, the evaluation of biodegradability in Table 3 was evaluated as ×:
No change, ▲: Slightly decomposed, but only natural organic matter extraction residue decomposed, Δ: Slightly decomposed, ○: Not complete but almost decomposed Is going.

[0057]

[Table 3]

There is no significant difference in the biodegradability of the sheet composed of the biodegradable resin alone and the composition comprising the natural organic matter extraction residue and the biodegradable resin in the soil. Easy decomposition in the inside was confirmed. In addition, it was confirmed that even if HDPE is not biodegradable by itself, biodegradability can be imparted to the composition to a small extent by adding a natural organic matter extraction residue.

[0059]

According to the present invention as described above, since the composition contains the residue of natural organic matter extraction, the natural organic matter extraction can be processed in a large amount to greatly reduce industrial waste.

[Brief description of the drawings]

FIG. 1 is a horizontal sectional view of a screen mill for producing a natural organic fine powder according to an embodiment of the present invention.

FIG. 2 is a vertical sectional view of the screen mill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Screen mill 11 Cylindrical main body 12 Rotating cylindrical main body 13 Input part 14 Discharge part 15 Screen 16 Rotating shaft 17 Support part 18 Shaft coupling 19 Cylindrical surface 20 Rotating blade 21 Fixed blade

Claims (10)

[Claims] 1. A composition comprising a natural organic matter extraction residue obtained by extracting necessary components from natural organic matter. 2. The composition according to claim 1, wherein the natural organic matter extraction residue is finely pulverized to an average particle size of 300 μm or less. 3. The composition according to claim 1, wherein the natural organic matter extraction residue is a tea husk. 4. The composition according to claim 1, wherein the composition comprises the natural organic matter extraction residue and a thermoplastic resin. 5. The composition according to claim 4, wherein the thermoplastic resin is an olefin resin. 6. The composition according to claim 1, wherein the composition comprises the natural organic matter extraction residue and a biodegradable resin. 7. A molded article obtained by molding the composition according to claim 1 into a pellet. 8. A molded product obtained by molding the composition according to any one of claims 1 to 6 into a sheet. 9. A packaging material obtained by further molding the molded article according to claim 7 or 8. 10. The packaging material according to claim 9, wherein the packaging material is a tray.