JP2003012016A - Environment-protecting paper cup and its lid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an environment-protecting paper cup and its lid which have a bioderadable coating made of a natural material applied on an internal surface of a paper base and which are easy to peel, sealable to fill a step at a seam and applicable to a filling machine. SOLUTION: The environment-protecting paper cup 2 has a flange 21 and a biodegradable coating 22 made of a natural material applied at least to an internal surface. The lid 1 has a paper layer 12, a dampproof layer 14 and an easy-to-peel layer 16 in this sequence wherein a surface of the layer 16 is sealed on the flange 21. The dampproof layer 14 is made of a natural-gum- based coating comprising a natural gum, an ester gum or the like. The easy-to- peel layer 16 is made of a biodegradable shellac resin coating made of a natural material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper cup for storing instant noodles, instant soup and the like and its lid material, and particularly to resource saving (without using petroleum resources) and environmental load related to waste disposal. It relates to the ultimate environmental protection paper cup and its lid material that contribute to the reduction of energy consumption.

[0002]

2. Description of the Related Art Conventionally, for example, a paper cup for storing instant noodles, instant soup, etc., which is poured by boiling water (often provided with an insulating material on the outer surface of the body) and a flange portion of the paper cup Sealed and flat lid materials are known, and they are widely used not only in the food and beverage fields such as instant noodles but also in various fields.

The above paper cup is generally formed by a paperboard (cup base paper) having a polyethylene layer on its inner surface for imparting water resistance, and the lid member is formed from the surface. Consists of a printing base material, a moisture-proof layer, and an easily peelable layer. The printing base material is a paper layer of coated paper, art paper, etc., and the moisture-proof layer is an aluminum foil or this aluminum foil is an environmental problem or product when incinerated. There is a problem that a metal detector cannot be used in the inspection of the above, and as an easily peelable layer which becomes the innermost layer, such as a ceramic vapor deposition film or a polyethylene terephthalate (PET) film, which solves this problem, for example, a linear low-resistance film excellent in heat sealability is used. Density polyethylene (LLDPE), low density polyethylene (LDPE), high density polyethylene (HDPE),
Polyolefin resin such as unstretched polypropylene (CPP), which is made of polystyrene, polybutene, or the like, is mixed with an incompatible component to cause cohesive failure, ethylene-vinyl acetate copolymer resin, ethylene- A hot melt adhesive made of acrylic acid copolymer resin or the like is applied.

However, as described above, the conventional paper cup and its lid material consist of petroleum resources that do not contribute to resource saving other than papers, and in the incineration of waste, there is a risk of dioxin problems and air pollution problems. However, in view of the recent environmental problems related to waste treatment and disposal and the further promotion of resource saving (does not use petroleum resources), that is, global environmental problems, these paper cups and their lid materials do not use petroleum resources at all. There has been a demand for the ultimate environmental protection paper cup and its lid material that are made of natural materials and that are biodegradable that naturally decompose in soil.

Therefore, as a high temperature water resistant container (corresponding to the above paper cup) which meets the above demand, for example, Japanese Patent Laid-Open No. 7-10
As proposed in Japanese Patent Application Laid-open No. 148 or Japanese Patent Application Laid-Open No. 2000-142783, a thermosetting film of shellac resin, which is a natural material having waterproofness and biodegradability, is formed on the surface, or Japanese Patent Application Laid-Open No. 6-64111. Disclosed in Japanese Patent Application Laid-Open No. 9-328117 and Japanese Patent Application Laid-Open No. 9-328117, a polyhydroxybutyrate which is a natural material (system produced from microorganisms) having sealability, waterproofness and biodegradability on the inner surface. / Polyhydroxy valerate copolymer (P
(3HB-3HV): For example, there is a biodegradable paper cup having a film mainly composed of trade name Biopol (manufactured by CIC in England).

[0006]

However, as a lid material for the above-mentioned biodegradable paper cup made of a natural material, the above-mentioned conventional construction, that is, a petroleum-based synthetic resin having no biodegradability, is demanded. All of them were natural materials and there was no biodegradable lid material. Therefore, the present inventors formed a thermosetting film of shellac resin or a film of P (3HB-3HV) on the paper layer as a lid material, as in the above-mentioned biodegradable paper cup, and used it on the flange portion of the biodegradable paper cup. I tried to seal it, but when opening it, the sealing strength was too great and either the lid material or the flange part broke and lacked in easy peeling property, and the cup seam (the flange part also has a step) There was a problem that the steps could not be filled up and the sealing was insufficient, or that the resulting lid material curled and lacked suitability for an automatic filling machine.

The present invention solves the problems and demands of the prior art. The problem is to provide an environmental conservation paper cup provided with a coating film made of a natural material and biodegradable. In the lid material to be sealed to the flange portion, a coating film having a biodegradability of a natural material is applied to the inner surface of the paper base material, and has a function as the lid material, that is, easy peeling property,
An object of the present invention is to provide an environment-friendly lid material that has excellent sealing property to fill the step of the seam, has no curl, and is suitable for an automatic filling machine.

[0008]

In order to achieve the above object in the present invention, first, in the invention of claim 1, the top surface opening portion has a flange portion, and at least the inner surface is made of a natural material and is biodegradable. An environmental conservation paper cup coated with a coating having
A lid member comprising a flange, a paper layer, a moisture-proof layer, and an easily peelable layer in this order from the surface, and the easily peelable layer surface is sealed,
The moisture-proof layer is a natural gum-based coating film, the easy peeling layer,
An environmental protection paper cup and a lid material thereof, which are made of a natural material and a biodegradable coating film.

According to the first aspect of the present invention, the lid material as well as the paper cup can be made of a natural material and can be made environmentally friendly with biodegradability, and a natural gum coating film is used for the moisture-proof layer. By providing elasticity, the step of the cup flange portion can be filled with the heat pressure at the time of sealing, and the occurrence of curl can be prevented to provide a lid material suitable for an automatic filling machine.

Further, in the invention of claim 2, the natural biodegradable coating film of the easily peelable layer is shellac resin, and the environmental conservation type paper cup and the lid thereof. It is a material.

According to the second aspect of the present invention, by using the shellac resin as the easily peelable layer, the shellac resin is relatively brittle due to the sealing pressure through the natural gum coating film as the moisture-proof layer. A crack is formed on the edge of the seal portion of the layer, and the peeling is cut from this crack during opening and peeling at the interface between the cut easy-peeling layer and the moisture-proof layer is manifested to provide an environment-friendly lid material having easy-peeling property. be able to.

Further, in the invention of claim 3, the natural gum-based coating film forming the moisture-proof layer is selected from natural rubber or its derivative, paper-penetrating natural resin, waxes and their derivatives. The environmental protection paper cup according to claim 1 or 2, and a lid member thereof.

Further, in the invention of claim 4, the material selected from the paper-penetrating natural resin, waxes and derivatives thereof is ester gum, dammal, copal, copaiba balsam, benzoi gum, nukou, opopanax, Thunderak, Guayak, Mastic,
Myrrh, Lectu Debaca, Kauri Gum, Rosin, Far Balsam, Elemi, Chicle, Jelton, Solva, Perillo, Venezuelan Chicle, Niger Gutta, Nispero,
Chikbul, Chilte, Guttacachu, Tunu, Sorbinha, Crown gum, Massalandba Chocolate, Massound Babalata, Balata, Rosidinha, Guayule, Guttapelka, Guttapercher, Shellac, Cucumber, Carnauba, Candelilla,
Gayrou, Komenukarou, Sugar canerow, Beeswax,
4. The environmental protection paper cup according to claim 3, which is at least one selected from the group consisting of sorghum, montan wax, oilseed wax and lanolin, and the lid material thereof.

Further, in the invention of claim 5, the material selected from the paper-penetrating natural resin, waxes and derivatives thereof is ester gum, and environmental protection according to claim 3. It is used as a paper pattern cup and its lid.

Furthermore, the invention of claim 6 is characterized in that the ratio of the natural gum or its derivative in the natural gum-based coating film forming the moisture-proof layer is in the range of 10 to 70% by weight. The environmental protection paper cup according to item 1, 2 or 3 and a lid material thereof.

According to the inventions of claims 3 to 6, as the natural gum-based coating film for forming the moisture-proof layer, natural rubber or a derivative thereof and a paper-penetrating natural resin or wax made of ester gum or the like. And a material selected from these derivatives, and by setting the ratio of this natural gum or its derivative in the range of 10 to 70% by weight, moderate elasticity and adhesion to the paper layer are improved. The elasticity can be used as an easily peelable lid material by filling the step of the cup flange portion and generating a crack at the edge of the seal portion of the easily peelable layer. If the ratio of this natural gum or its derivative is less than 10% by weight, the moisture-proof film made of this natural gum-based coating has poor elasticity, resulting in easy peeling and lack of the function of filling the step of the flange portion. If it exceeds 70% by weight, the amount of natural resin having paper permeability decreases, and the adhesion to the paper layer becomes poor, which is not preferable. Therefore, the ratio of the natural gum or its derivative is preferably in the range of 20 to 50% by weight in terms of the balance between elasticity and adhesion.

The term "biodegradability" as used above means the property that a polymer is decomposed into an oligomer, a monomer, or a substance having a lower molecular weight by the action of an enzyme produced by a microorganism existing in the environment such as mold, bacteria and yeast. Therefore, it is desirable to be finally decomposed into water, carbon dioxide gas, methane and the like. In addition, the above-mentioned easy peeling property is a range of 2.9 to 5.9 N / 15 mm in terms of heat sealing strength according to JIS-Z-0238 of the test method for the sealed soft packaging bag, and generally the easy peeling layer. What is peeled by causing cohesive failure between the layers of the above is measured by the above-mentioned measuring method, the peeling in the present invention is the property of peeling in the range corresponding to the heat seal strength due to interfacial peeling and breakage of the easily peelable layer. Therefore, it is difficult to measure by the above-mentioned measuring method.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings. As shown in the perspective view of FIG. 1, the present invention relates to an environmental protection paper cup (2) for storing instant noodles, instant soup, etc. and an environmental protection lid material ( 1), and more specifically, as shown in the partial side sectional view of FIG. 2, it has a flange portion (21) at the top opening and is biodegradable with a natural material on the inner surface of the paper cup body (20). The environmental protection type paper cup (2) provided with the coating film (22) having the property and the flange portion (21) of the paper layer (12), the moisture-proof layer (14) and the easily peelable layer (16) from the surface. A lid member (1) in which the surface of the easily peelable layer (16) is sealed, wherein the moisture-proof layer (14) is a natural gum-based coating film, and the easily peelable layer (16) is Environmentally friendly lid material (1) consisting of a coating of shellac resin, which is a natural material and has biodegradability. The ultimate environmental conservation paper cup (2) and its lid (1) made of natural and biodegradable material, that is, resource saving (does not use petroleum resources) and contributes to reduction of environmental load related to waste disposal. ).

A coating film (2) which is biodegradable with the above-mentioned natural materials
2) may be applied to the outer surface of the paper cup body (20) to supplement water resistance from the outside, or may be applied to the surface of the lid member (1).

The materials and the like used for the environmental protection paper cup of the present invention and its lid will be described in more detail below. First, as shown in FIG. 2, as the paper layer (12) as a printing substrate constituting the environmental protection type cover material (1) of the present invention, for example, a high-quality paper or a coat having a basis weight of 50 to 70 g / m ² is used. Paper, art paper, and the like can be mentioned. Among them, coated paper and art paper are preferably used because they have excellent printability.

Further, the moisture-proof layer (14) constituting the environmental protection type cover material (1) of the present invention is selected from natural rubber or its derivative, natural resin having paper permeability, wax and its derivative. This moisture-proof layer (1
The ratio of natural gum or a derivative thereof in the natural gum-based coating film forming 4) is 10 to 70% by weight, preferably 20 to 50% by weight. As a coating method for 12), for example, 20
A method of forming a coating film by slot die coating (nozzle coating) after melting at 0 ° C or less, and a coating solution of cyclohexanone or butyl acetate as a solvent to a solid content concentration of 50% by weight or less, and coating by lip coating or comma coating. There is a way to make it. The coating amount of this coating film is 1
5 to 35 g / m ² (dry) is necessary for the moisture-proof layer (14).

As the easily peelable layer (16) constituting the environmental protection type cover material (1) of the present invention, a thermosetting shellac resin which is a natural material and has biodegradability is used. This is a thermosetting natural resin obtained by refining a resinous substance secreted by Larcucopora latipes having a body length of about 0.6 to 0.7 mm by a heat melting method, a soda method, a solvent extraction method or the like. This resin is biodegradable, has excellent water resistance and oil resistance, and is not toxic. Therefore, it is a suitable resin for food and medicine containers. The resin is applied to the moisture-proof layer (14) by, for example, comma coating or lip coating, and 10 g / m ² of a decolorizing shellac resin added with about 2% of a surfactant in an ethanol solution of 20 to 30% by weight. The easy-peelable layer (16) is applied with a coating amount of about the same.

Further, as shown in FIG.
The paper cups that make up the entire pattern paper cup (2) and its lid material (1)
As the main body (20), for example, a basis weight of 250 to 400 g
/ M ²Used with a cup of base paper (including uncoated paper)
To be

The coating material (22) made of a natural material and biodegradable provided on the inner surface of the paper cup body (20) is made of a decolorized shellac resin of 20 to 30% by weight on the paperboard by, for example, lip coating. A coating film having a biodegradability as a natural material by applying an ethanol solution containing about 2% of a surfactant at a coating amount of about 10 g / m ² (2
It can be 2).

Alternatively, the paper cup body (20)
As a coating material (22) which is a natural material and is biodegradable, which is provided on the inner surface of the resin, a bio-derived thermoplastic material such as polyhydroxybutyrate (PHB) or polyhydroxybutyrate / polyhydroxyvalerate copolymer (P (3HB
-3HV)) and the like, but the former P
HB simple substance has high crystallinity, is hard and brittle, and requires coextrusion with, for example, low density polyethylene (LDPE) to form a coating film. Therefore, the latter copolymer P is used.
(3HB-3HV) can be preferably used as a single substance or because it is a natural material and has biodegradability. These materials can be laminated on the above paperboard to a thickness of about 30 μm by, for example, a T-die melt extrusion method to form a coating film (22) which is a natural material and has biodegradability.

Using the base paper for the environmental conservation pattern paper cup obtained as described above, it is molded by a cup molding machine, as shown in FIG.
As shown in (1), the environmental protection paper cup (2) can be provided with a flange portion (21) at the upper opening and a bottom plate (24) having the same structure as this base paper at the lower portion. Furthermore, the environmental protection type lid material (1) obtained above can be sealed to this flange portion to form the environmental protection type paper cup (2) and its lid material (1).

As shown in the partial side sectional view of FIG. 3, this environmental protection paper cup (2) and its lid (1) are opened by pulling the pull tab (11) around the lid (1) by hand, for example. When pulled up, the edge (16b) of the seal part (16a) of the easy-peelable layer (16) made of a relatively brittle shellac resin is cut, and the cut easy-peelable layer (16) and the moisture-proof layer made of a natural gum system. Peeling is manifested at the interface with (14) to facilitate opening.

Further, as shown in the schematic front view of FIG.
When the environmental protection type cover material (1) of the present invention is sealed in the environmental protection type paper cup (2), the moisture-proof layer (14) is coated with an elastic natural rubber-based material so that the heat at the time of sealing can be improved. Step (21a) on the flange (21) of the paper cup due to pressure
Can be filled with the easily peelable layer (16) and the moisture-proof layer (14), and the lid member (1) having a hermeticity can be obtained.

[0029]

EXAMPLES Next, the present invention will be specifically described with reference to examples. <Example 1> As shown in FIG. 2, a single-side coated paper having a basis weight of 63 g / m ² was used as a paper layer (12), and a non-coated surface of the natural gum system having the following composition melted at about 200 ° C. The material was coated with a die coater nozzle at 35 g /
The moisture-proof layer (14) having a coating amount of m ² was used. Further thereon, a shellac resin solution having the following composition was applied by lip coating at a coating amount of 10 g / m ² and dried in a drying oven for 10 minutes to form an easily peelable layer (16).
The sheet was cut to 90φ to obtain the environmental protection type cover material (1) of Example 1. [Composition of Natural Rubber Material] Natural rubber: 20% by weight, modified rosin: 57% by weight, carnauba wax: 7% by weight, ester gum: 8% by weight, gutta percha: 2% by weight. [Composition of shellac resin solution] Decolorized shellac in 25% by weight ethanol solution, surfactant: trade name Poem J0
021 (manufactured by Riken Vitamin Co.) added at 2% by weight.

Comparative Example 1 A lid member of Comparative Example 1 was obtained in the same manner as in Example 1 except that the easily peelable layer (16) made of shellac resin was removed.

Comparative Example 2 P (3HB-3HV): Biopol (hydroxyvaleric acid content on the non-coated surface of a single-side coated paper having a basis weight of 63 g / m ^{2 as} a biodegradable resin of a natural material. 5%) (manufactured by CIC, UK) to form a release layer having a coating amount of 30 g / m ² by a T-die melt extrusion method,
This was cut into 90φ to obtain a lid member (1) of Comparative Example 2.

On the other hand, on one surface of an uncoated ivory having a basis weight of 220 g / m ² , P (3HB-3HV): Biopol (hydroxyvaleric acid content 5%) (manufactured by CIC, UK)
Using a paper cup base paper on which a coating film (22) having a biodegradability of a natural material having a coating amount of 30 g / m ² was formed by a T-die melt extrusion method, a paper cup molding machine (PMC machine) was used. As shown in Fig. 3, the environmental protection pattern paper cup (2) having the upper outer diameter of 86φ is formed by molding the natural material into a biodegradable coating film on the inner surface, and the flange portion (21) thereof.
The sealing material obtained in Example 1 and Comparative Example 1 was sealed under sealing conditions: 1.5 seconds × 0.02 MPa pressure at each temperature to evaluate the quality of the lid material, and the results are shown in Table 1. It was shown to. Easy opening property and opening condition: Since it is difficult to measure the peel strength, the peeling feeling was evaluated and the condition on the flange surface was taken as the opening condition. Sealing strength: The pressure was measured by a measuring method based on the Ordinance of the Ministry of Milk, etc., and the sealing state at the step of the cup flange was evaluated. Workability: The suitability for an automatic filling machine was evaluated by the presence or absence of curl. Content resistance suitability: The condition of the lid material when the curry powder was filled was visually evaluated.

[0033]

[Table 1]

From Table 1, it can be seen that the lid material having the moisture-proof layer made of the natural gum material of Example 1 and the easy peeling layer made of shellac resin is excellent in easy-opening property, and the opening state is flat in the flange portion and has a smooth texture. It was good. In addition, the steps of the cup flange were properly filled, and the moisture resistance, content resistance, and suitability for an automatic filling machine (no curl) were excellent. On the other hand, with the lid material of Comparative Example 1 which is a natural gum-based material that also serves as a moisture-proof layer and an easily peelable layer, the step difference in the cup flange portion is filled, the moisture-proof property and the suitability for an automatic filling machine are excellent. A lot of gum adhered to it and it had a bad mouthfeel. Further, there is a problem that the gum dissolves in the contents and bleeds into the paper layer. Further, in the cover material of Comparative Example 2 which is a natural material and has biodegradability of P (3HB-3HV) and also serves as a moisture-proof layer and an easily peelable layer, the sealing temperature is too high and paper burns occur, resulting in a large sealing strength. At the time of opening, the lid material was broken and it was impossible to open. Further, the flange step was not filled well, and curling occurred, resulting in lack of suitability for an automatic filling machine.

[0035]

Since the present invention has the above-mentioned constitution, it has the following effects. That is, an environmental conservation type paper cup having a flange portion at the top opening and a biodegradable coating made of a natural material, and a paper base material, a moisture-proof layer, and easy peeling that are sealed to the flange portion. In the lid material consisting of layers, the moisture-proof layer is a natural gum-based coating film, and the easily peelable layer is a coating material that is biodegradable with a natural material. It is possible to make it an environmentally friendly type, and to give elasticity by using a natural gum-based coating film for the moisture-proof layer so that the step of the cup flange part can be filled with the heat pressure at the time of sealing, and it can curl It is also possible to prevent the occurrence of the above and to provide a lid material suitable for an automatic filling machine.

By using a shellac resin as the coating film which is a natural material and has biodegradability of the easily peelable layer,
Due to the sealing pressure through the natural gum-based coating as the moisture-proof layer, a crack is formed at the edge of the seal portion of the easily peelable layer made of a relatively brittle shellac resin, which is cut from the crack at the time of peeling and opening. It can be used as a cover material for an environmental conservation type paper cup that easily peels off at the interface between the peeling layer and the moisture-proof layer.

Further, as a natural gum-based coating film forming a moisture-proof layer, natural gum or a derivative thereof and a material selected from a natural resin such as ester rubber having paper permeability, waxes and derivatives thereof. The content of this natural gum or its derivative is in the range of 10 to 70% by weight, preferably 20 to 50% by weight, so that it has appropriate elasticity and adhesiveness to the paper layer. It is possible to obtain a lid material for an environmental conservation type paper cup that has excellent elasticity and fills the step of the cup flange portion, and also causes cracks at the edges of the seal portion of the easily peelable layer to provide excellent peelability.

Therefore, the present invention relates to a paper cup for storing instant noodles, instant soup, etc. and its lid material, especially for saving resources (does not use petroleum resources) and reducing environmental load related to waste disposal. As an environmental protection paper cup and its lid material, it has excellent practical effects.

[Brief description of drawings]

FIG. 1 is a perspective view illustrating an embodiment of an environmental protection paper cup of the present invention and a lid member thereof.

FIG. 2 is an enlarged partial cross-sectional view illustrating an embodiment of the environmental protection paper cup of the present invention and its lid member.

FIG. 3 is an enlarged partial cross-sectional view for explaining an example of an opened state of the environmental protection paper cup of the present invention and its lid member.

FIG. 4 is an enlarged partial front view illustrating an example of a sealed state of the environmental protection paper cup of the present invention and a lid member thereof.

[Explanation of symbols]

1. Environmentally friendly lid material 2 Environmental protection paper cup 11 ... pull tab 12 ... Paper layer 14 Moisture barrier 16: Easy peeling layer 16a ... Seal part 16b ... Edge of seal part 20 ... Paper cup body 21 ... Flange 21a ... Step portion 22 ... Biodegradable coating made of natural material 24 ... Bottom plate

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 3E033 AA08 BA10 BA11 BA15 BA18                       BA30 BB08 CA07 CA09 CA20                       DA06 DA08 GA03                 3E084 AA06 AA12 AA34 BA01 BA07                       BA09 CA01 CB04 CC07 CC08                       FD13 GB08 HA01 HB01 HC07                       KA12 LA02                 4F100 AJ01B AJ01C AJ11C AN01C                       BA02 BA04 BA07 DG10A                       EH46 GB16 GB18 JD04C                       JL00B JL14D

Claims (6)

[Claims] 1. An environmental conservation type paper cup having a flange portion at the top opening and at least an inner surface of which is coated with a biodegradable natural material, and a paper layer from the surface to a moistureproof layer on the flange portion. A cover material in which a layer and an easily peelable layer are formed in this order, and the surface of the easily peelable layer is sealed. The moisture-proof layer is a natural gum coating film, and the easily peelable layer is a natural material and is biodegradable. An environmental protection paper cup and its lid material, which are made of a coating film. 2. The environmental protection paper cup and its lid material according to claim 1, characterized in that the coating film made of natural material and biodegradable for the easy peeling layer is shellac resin. 3. The natural gum-based coating film forming the moisture-proof layer comprises natural rubber or a derivative thereof and a material selected from natural resins having paper permeability, waxes and derivatives thereof. The environmental conservation paper cup according to claim 1 or 2, and its lid material. 4. A material selected from natural resins, waxes and derivatives thereof having paper permeability, ester gum, dammal, copal, copaiba balsam, benzoi gum, nukou, opopanax, sundalac, guaiac, mastic, Myrrh, Letsch de Baka,
Kauri Gum, Rossin, Far Balsam, Elemi, Chicle, Jelton, Solva, Perillo, Venezuelan Chicle, Niger Gutta, Nispero, Chikbul, Chilte, Gutta Cacchu, Tsunu, Solbinha, Crown Gum, Massa Randba Chocolate, Mazzone Babalata, Balata, Rossidinha , Guayule, gutta percha, gutta percha, shellac, auri cucumber roe, carnauba burrow, candelilla roux, geiro, komenukarou,
Sugar cane beeswax, beeswax, owl, montan wax,
The environmental conservation paper cup and its lid material according to claim 3, which is at least one selected from the group consisting of oilseed wax and lanolin. 5. The environmental protection paper cup and its lid material according to claim 3, wherein the material selected from the paper-penetrating natural resin, waxes and derivatives thereof is ester gum. 6. The ratio of natural rubber or its derivative in the natural gum coating film forming the moisture-proof layer is 10 to 70.
The environmental conservation paper cup and its lid material according to claim 1, 2 or 3, characterized in that it is in the range of weight%.