TW415886B - Naturally decomposable disposable dining ware and process for making the same and its process method - Google Patents

Abstract

The present invention relates to a naturally decomposable disposable dining ware and its process method. The process comprises forming a moldable concoction by mixing the mixture of husk powder, the filler (calcium carbonate), and the adhesive (polyvinyl alcohol) with water according to a suitable proportion; calendering the concoction into a sheet of a composite material; molding the sheet into a dining ware, which is environmental friendly and can even be used as a fertilizer and forage.

Description

415886 V. Description of the invention (丨)-[Scope of application of the invention] _ This invention relates to a kind of disposable tableware that can be decomposed naturally and its manufacturing process, especially a kind of natural organic material. — Environmental protection, can solve the high pollution of traditional disposable dishware, or the risk of anti-ring. [Related technology] The use of natural materials to make disposable tableware (such as bowls and plates) for food and beverages, in order to achieve the goal of environmental protection, has been developed for many years in the industry and science and technology, some of which have already been It is well known and published, for example, the Republic of China Patent Application No. 710402826, “Simple Sanitary Tableware and Manufacturing Method j (hereinafter referred to as Case No. 826), Application No. 821040 — No. 9 "Method for manufacturing environmentally-friendly dinner plates" (hereinafter referred to as the "No. 9" case), and "Method for making disposable for disposable plates and bowls" (U.S. Patent No. 5,500,089) related patents are disclosed in patent applications such as "bowls and trays". The technology disclosed in the case No. 826 is based on the materials of Wuzhi and nature (or cassava powder) as raw materials, blended with water, steamed for a period of time, and then cooled to a certain temperature , Then put it into the mold and apply high pressure and then shape it into tableware; although the raw materials used for this tableware are mainly natural materials, the high temperature and high pressure process (such as steaming) can be used in the process of making utensils. For molding, the processing conditions required are relatively strict, and the contained plant sediment or cassava (starch) ingredients will make the cutlery made obviously poor in moisture resistance, especially the starch is easily susceptible to moisture. Moldy and bad,

415886 V. Description of the invention (2) These phenomena are a fatal flaw for food and beverage appliances that require high safety standards. The technology disclosed in No. 0-9 and U.S. Patent No. 5 50 0 0 9 · The materials used are organic fibers contained in a natural plant with apparently striped fiber Broken into short fibers, and pulverized, and then mixed with starch as an adhesive, and then gelatinized into a gelatinous mixture. After using a fine mesh breathable mold for pressure drying and dehydration, After being shaped by a mold that is heated and pressurized, it can be made into dishes such as dishes and plates, and finally can be completed after drying and solidification. Therefore, its process is obviously more complicated than the aforementioned case No. 826, and because Using starch as an adhesive, there are still many problems such as resistance to water, moisture, and even mildew. As for the use of natural short fibers as the base material, not only the steps for obtaining the materials are complicated, but the structure formed by the short fibers will be more difficult. Making the texture of the product porous and loose, its ability to prevent leakage and water resistance is bound to be tested. On the other hand, in the production process of the above two known technologies, a large amount of water must be used. Relatively, it will cause a lot of waste water, which will be a threat to environmental protection, and the treatment of sewage will cause production costs. [Summary and purpose of the invention] The main purpose of the present invention is to provide an environmentally friendly disposable tableware that can be naturally decomposed and can even be used as fertilizer or feed. Since the disposable tableware disclosed in the present invention is made of organic raw materials made of natural cereal crusts, combined with raw materials such as non-toxic and naturally decomposable adhesives and fillers,

415886 V. Description of the invention (3) It can be decomposed in the natural environment, and even be used as fertilizer or feed, and it has the function of utensils, and can be decomposed or reused after being discarded for-fertilizer, or feed, etc. It is a kind of disposable tableware that is environmentally friendly and has a very high utilization value. .. The second object of the present invention is to provide a disposable tableware manufacturing technique that is easy to manufacture, has low raw material prices, easy raw material acquisition, and meets environmental protection requirements. According to the disclosure, the process for making naturally decomposable disposable tableware is mainly a powdery substrate made of cereal rind and a filler (Carbon acid); C a 1 cium C arb ο nate ) 'And adhesives (polyvinyl alcohol; PVA, P ο 1 yviny IA 1 ccoh ο 1), mixed uniformly according to the appropriate ratio, and then blended with water as a medium, so that the powdery substrate and the filler through the adhesive The bonding effect binds into a plastic mixture, and then the mixture is rolled into a moon-shaped composite material. After vacuum forming into tableware, and then applying a simple drying and waterproof treatment, a fine texture can be made, and Environmentally friendly disposable tableware. The main raw material used in the present invention is coriander rind. Due to the extremely high yield of cereals, the relative amount of cereal rind after taking out coriander grains is also relatively large. Generally speaking, it is treated as waste, even if it is used for other purposes. , Its price is also very low, and the acquisition of raw materials is not difficult; on the other hand, most of the so-called environmentally friendly tableware are mostly made of wood or paper as the main raw material. Due to the difficulty in obtaining wood, it is also necessary to cut the valve forest Obtained, so its cost is high, but it is not as economic as the present invention, and the tree cutting valve caused by the acquisition of materials is increasingly precious and natural resources of today's environment

Page 6 415886__ V. Description of the invention (4) In terms of traditional environmental protection materials mainly using wood materials, it is obviously less economical. In addition to indirectly affecting ecological development, it may even cause major problems of soil and water conservation ^. '-Another object of the present invention is to provide a fine-texture, environmentally friendly disposable meal. Because the present invention uses a powdery cereal rind, and then uses powdered carbonate (CaC03; Calcium Carbonate) as a filler for Fill the gaps in the tableware structure, so you can get a high-quality environmentally friendly disposable tableware that is not as loose as the fiber structure. In the production process of disposable washware disclosed in the present invention, only a small amount of water is used, and all of this water is used to prepare a slightly viscous composite material. Therefore, during the production process, Does not produce a large amount of wastewater, which is of great help to environmental protection and cost reduction. [Explanation of drawings] FIG. 1 is a sectional view of the structure of a tableware according to the present invention. FIG. 2 is a production flow chart 3 of the present invention. FIG. 3 is a finished product appearance view of the first embodiment of the tableware of the present invention. FIG. 4 is a finished product appearance view of the second embodiment of the tableware of the present invention. [Detailed description of the embodiment] Please refer to "Fig. 1". The environmental protection tableware 10 disclosed in the present invention, as far as its cross-sectional structural composition is concerned, includes: a composite material layer 2 0 1 for forming the tableware 10 And a waterproof layer 3 0 covering the contact surface 1 0 1 of the tableware 10 for containing food and in contact with the food, for protecting the composite material layer 20 from moisture or food in the food Other ingredients impregnate and decompose; but on the other hand

415886 V. Description of the invention (5), in order to make the composite material layer 20 composed of natural substances decompose naturally after being discarded, so the waterproof layer 3 0 is not applied when the tableware 10 does not contact the rest of the food; In order to achieve the foregoing purpose, when selecting the material of the waterproof layer: the material should not react with the water (H2 0) or other ingredients in the food, such as starch, fat, etc. In addition, because this waterproof agent is directly In contact with food, the decomposability and toxicity of the waterproofing agent is also one of the considerations. Based on the foregoing, the applicable waterproofing agent is epoxy resin (E ρ ο X y R es 1 ns) or vinyl water-based waterproofing. The above-mentioned ethylene-based water-based waterproofing agent refers to a compound having an ethyl fluorenyl group (Ή ny 1, (C H2 = C Η-) η), and can be used as a waterproofing agent, in which the physical and chemical properties of the epoxy resin have been It is widely known that it is non-decomposable and toxic, and one of the vinyl-based waterproofing agents used is denatured ethyl hoof resin, which has been certified by the US Food and Drug Administration (FDA and Drug Administration, FDA) to have no degradability and toxicity. Sex. The basic composition material of the above composite material layer 10 includes: a. A powdery base material made of a sloppy outer skin, whose composition weight percentage is 50% ± 3% (that is, 47% to 5%). 3%); b. Fillers to fill the gaps in the composite material layer 10, the composition weight percentage of which is 28% ± 3% (that is, 25% ~ 31%); and c. Adhesives, It is used to bond the substrate and the filler together by bonding, and its composition weight percentage is 2 21¾ soil 3% (that is, 19%-25%). The powdery substrate is obtained from the outer skin of the tadpoles (such as rice and wheat). The outer skin is ground into a powder by a grinding device, and then screened by a fine mesh screen. No purification is required. Steps: In principle, this powdery substrate takes 70% of those who can pass 50 meshes. 'It can pass 60 to 100 meshes.

Page 8 415886 V. Description of the invention (6) accounted for 30%; the filler is carbonated fishing (C a C 0 3; C a 1 c 〖um C arb 〇ri ate), used to fill the composite material To increase the compactness of the composite material, in which the calcium carbonate is powdery and accounts for 99% of those who can pass through the 100 mesh; the adhesive is polyvinylacetate (PVA; ρ ο 1 yviny 1 A 1 c 〇h ο 1), can be permeated with water as a lubricant, so that a mixture of these three basic constituents is mixed to form a slightly viscous composite material by bonding, in order to facilitate Molding and processing to make utensils. For the characteristics of polyvinyl alcohol (PVA), please refer to "Table 1". Among them, polyvinyl alcohol is a polymer. Depending on the molecular weight, the physical properties such as viscosity and solubility will also vary. The types of polyvinyl alcohol that can be used in the present invention are shown in "Table 2", and its solubility in water is shown in "Table 3". In principle, high-viscosity polyvinyl alcohol C such as BP-2 4) The effect is better. Please refer to "Fig. 2". The manufacturing process of environmentally friendly tableware disclosed in the present invention includes: (1) providing a composite material with micro-adhesion; (2) calendering the composite material to a thickness of about 0. 8 faces ~ 1 · 3 ram sheet-like composite material; (3) forming the sheet-like composite material into a tableware using a molding process (such as negative pressure molding), (4) drying and shaping the tableware initially; and (5) forming a Waterproof layer on the food contact surface of tableware 10

V. Description of the invention (7)-The step (1) includes the following steps: (1-1) Grinding the removed rind-like outer skin to pass through a 100 mesh and 60-100 mesh Two kinds of powders, and then the two kinds of powders are mixed into a powdery base material according to an appropriate ratio (of which 100% can pass through 0 mesh, and 0. 60 to 100% pass through 30%). ; (1-2) The powdery substrate, filler and adhesive are mixed and mixed into a homogeneous mixture according to the composition ratio, and the weight ratio between the three is approximately 5: 2.8: 2.2. The allowable variation of any of the constituents in relation 1 is approximately 3%; and (1-3) in a relation of approximately 1: 2 · 5 by weight, the water and the mixture completed in step 2 are mixed together ( The allowable variation of the two is about ± 5%), and they are stirred into a composite material. The filler (polyvinyl alcohol) only absorbs swelling in water at normal temperature, but does not dissolve, which results in the formed composite material having Slightly sticky. In the forming method in step (3), a sheet-like composite material containing a small amount of moisture and being plastic is drawn directly above the mold into a preliminary blank of tableware 10 by using a drawing mold preset with a shape of tableware; Of course, at the beginning of the preliminary blank of the tableware 10, if it has unnecessary burrs, while the preliminary blank is still plastic, it is easier to trim and cut. In the drying step of step (4), the grapefruit mold can be dried under the condition that the grapefruit mold is maintained at a negative pressure by using hot air at a temperature not exceeding 200 ° C to set the shape. The time required depends on the shape of the tableware. Depends on the actual water content and the temperature of the hot air. The above step (5) includes the following steps:

Page 10 415886 V. Description of the invention (8) (5-1) Coating (such as epoxy resins) or vinyl-based water-repellent water-repellent agent on the contact surface of tableware 10 with food, here Because the waterproof layer is not decomposable, in order to avoid that when the rest of the tableware except the waterproof layer is decomposed naturally, too much waterproof layer remains, so the coating thickness of the waterproof layer _ is minimized to be 6 ~ 1 0 m, in general, in order to facilitate coating, a solvent (S 〇 丨 vent) is added to the water-repellent agent to increase its fluidity. The type of solvent used and the amount of the solvent are related to the type of water-repellent agent. These information When the user purchases the waterproofing agent, the manufacturer will provide it. Usually, the waterproofing agent purchased by the user has been added with a solvent to facilitate the user to use it without preparation; and (5-2) drying and removing the waterproofing agent. The contained solvent makes the waterproofing agent can be fixed on the surface of the tableware 10. The aforementioned drying conditions are related to the type of solvent used. The aforementioned drying conditions will be marked on the instructions of the waterproofing agent, for example. The present invention purchases a denatured vinyl resin as a waterproofing agent from Dui Xu XP aints, and the solvent provided is F 8 50-5 9 4 5 3 (this is the product code), and the drying conditions For T (temperature) = 193 ° C, t (time) = 3.5 minutes. Of course, after making the tableware 10, general sterilization treatment (such as ultraviolet sterilization) should be applied to ensure the hygiene and safety of the tableware. Finally, please refer to "Figures 3 and 4", which are external appearance drawings of the disposable tableware 10 according to the process disclosed by the present invention. Since the present invention uses rapid negative pressure forming technology and sheet-like Plastic composite material, which is more suitable for the production of shallow-deep containers such as dinner plates 10 a or disposable lunch boxes 10 b

415886 V. Description of the invention ¢ 9). Shallow, excellent plasticity when the sheet-like composite material is not dried, so it can be easily made by negative pressure forming technology. ^ Because the tableware 10 will inevitably come into contact with water during use, at this time: it can be used for several hours by the waterproof layer without being decomposed and used. If finished, it is discarded as garbage because the tableware is not in contact with food The rest of the contact surface is not provided with a waterproof layer. It can contact the moisture in the air and soften and decompose when damped. After the outermost layer is softened and decomposed, the inner surface is exposed, and the same decomposition process is performed. There is only one thin waterproof layer left here, because the waterproof layer is not toxic and decomposable, and will not affect the environment. According to the above decomposition steps, the tableware will naturally decompose in a short period of time and have the value of fertilizer. In the lake, the main body composed of natural organic matter can still be eaten by fish without causing any pollution, which is obviously environmentally friendly and practical. Of course, the above embodiments are intended to disclose the technical content of the present invention and are not intended to limit the scope of the present invention. However, those skilled in the art will understand the technical content of the present invention without departing from the technical features of the present invention. Any change should be limited by the scope of the patent application mentioned below = [effect of the invention] 1. Environmental protection effect, it will not cause pollution after being discarded; the disposable tableware disclosed in the present invention is taken from natural And an environmentally-friendly tableware made of non-toxic raw materials. If it is discarded as garbage after use, it can be naturally decomposed in a short period of time, and it has the value of fertilizer. The main body of ingredients can still be eaten by fish without causing

Page 12 415886 V. Description of the Invention (ίο) Any pollution. 2 · The raw materials are easy to obtain and low cost; the raw materials used to generate the environmentally-friendly tableware disclosed in the present invention are mainly based on the base material derived from the grain outer skin. It is not difficult to obtain. It is already regarded as waste material. There is no other obvious use value other than as feed. Therefore, the cost of obtaining is obviously more than another widely used environmentally friendly raw material (wood). For cheap. [Illustrated Symbols] 10 ....... Tableware 10a ....... Disposable Dinner Plate 10b ....... Disposable Lunch Box 10 1 ...... Contact surface 2 0 ....... composite material layer 3 0 ....... waterproof layer

Page 13 415886 V. Description of the invention (11) General characteristics of CCP PVA Item Description Appearance White to light yellow particles or powder. 7 ： 以 ί C 2。 Thermal stability I true specific gravity 1. 26 ~ 1. 31, grams filled specific gravity 0. 6 ~ 0. 7: ί C 2。 Two 2 -ο, solution 6 1 color separation to change to full heat, speed up, and time up, with a long time c C "ο α yellow change gradually one by one

Start to open right and left V to the extreme '' Solution 2 and ten drug-resistant, solvent-resistant plant double, high-grade materials', good materials, agents, esters, salt, acid resistance of weak substances weaken weakest chlorine- ^ Youshi 'dagger said that the oily physical properties are stable and stable, such as moisture absorption! It has lower hygroscopicity than other water-soluble polymers and is affected by humidity. Permeability 丨 Except for thin PVA, except for 暝 20, for H2, N2, C02 and other gases: 1 is barrier 3 and only light; quality is not affected by 3 light exposure. Film-forming properties 丨 PVA film-forming properties are good 'its physical properties such as pit tensile strength, tear strength, and abrasion resistance are better than other water-soluble resins; !! Non-toxic: Pure PVA is not harmful to the human body; for example, some drugs are also used as adhesives today. (Table I)

Page 14 415886 V. Description of the invention (12) Molecular weight and average degree of polymerization of PVA 1 Completely basic product 2 Average degree of polymerization (DP) 3. Molecular weight-BF-26 2,500-2,600 1 1: .000 -1 2 0.0 00 BF-24 2,400-2,500 I 1 07.000-1 1: .000 i-BF-24E 2,400 to 2.500 1 I0S, 000-1 15.000 BF-22 E 2,: 5 0 to 2.3 5 ϋ! 10 0.0〇0 to丨 06.000 | BF-20 2.000-2.100 ί S9.000 ～ 9.5 0 00 Sf- 1 7H 1.7 0 0 -1 .S00 1 7 5.0 00 ^ 8 0.0 0 0! BF- 1 7 1.70 0 -1.8 00 i 7 5 0 0 0 to S 0.0 0 0 'BF- 1 7E 1 .7 00- 1 .S00 76,000 ^ 81.000; BF- 1 4 1. 1 0 0 to 1 2 0 0 i 5 0.0 0 0-5 5. 0 0 0 BF-OS SOO-900 3 5.0 0 0 to 4 ◦. 0 0 0 BF-0 5 500-600 1 2:. 0 0 0-2 '. 0 0 0 < 1 B F-04 400-500 j ! s, ο ο 〇 ～ m] ο BF-03 3 0 0 ~ 400. 13.000 ~ is.000 i BF-2 0 W 2.000-2.100 j 9 L 0 0 0 to 9 6.0 ⑼ 1 1 BF-1 7 W 1. 7 0 0 ~! , 3 0 0 77.0 0 0-82.00 {): j BF-1 4 W 1. 1 0 0 ～ 1. 2. 0 丨] i 5 0.0 () 0-5 5. 0 0 0 1 2 ， Partial alkalization Product i BP-26 2500-2650 124.0 0 0 to 13 0.0 0 0 BP-24 2400 to: 5 (DO 1 IS, 000 to 1 24.000 BP-20 2000-2100 j 9 9 ′ 0 0 to 1 0 4 0 ϋ 0 BP-2 0 Η 2000 ~ 2100 99.000-100.000 ι | BP- I 7 1 700 ~ 1 S00 S4.000-S9.000 Β Μ 4 110 0 -1 2 0 0 ί 54.000-60.000 ij BP-0 8 8 0 0-1 000 40,000- 5 0.00 0 BP-05 5 5 0 ～ 6 5 0 i 27.000 ～ 3:, 000 ： 1 BP-04 420-550: ： 1.00〇-: 7,00ΰ: Γ ~ BP-0 3 3 0 0 to 4 H 0 15,000-21.000 3 Ultra-low test chemical BC-24 2,5 00 -2,700; m000 to 140.00 0! BC-20 2.300 to 2.500 120,000 to 13 2.00 0! BC-0 7 7 0 0 ~ 7 5 0 j 33.000 ~ 45.000, BC-07P 700 ~ 750 1 39.000-45.000 BC-0 5 600 ~ 700 33.000-33,000 i BC-0 5 P 600 ~ 700 1 3 4.0 0 0- 3 9.0 0 0 4 Low-ash content Fen alkali chemicals BC-24R 2 4 0 0 ～ 2-5 0 0 i 122.000-127.000: BC-l7 R 1 .7 00 ~ 1, S00 3 6, 5 0 0-9 1 . 6 0 0 BC-05 R 550-650 i 28.000-33,000 (Table 2) 1 sink_1 page 15 415886 5. Description of the invention (13) Product name: Solubility (%): BF-24, QF-24E'AW-40 1 -BF-26BP-24-BC-24 | i 1 0¾ ~ 1 5% BF-20, BP-20 'BF-1 7E BF-1 7 Η' BF-1 7 · BF-2 0 W-BF-1 7 W i BP-20H, BP-17, AW-201, BC-20 '15% -20%! 1! BF- 1 4, BP-08, BF-08' BF ^ 05 · BF-14W-BP- 14 · 1 BP, 05, BC-05 2 0% to 3 0% i | BP-03, BF-03 'BP-04 4 0 0 / 〇 ^ 5 0%! (Table 3)

Page 16

Claims (1)

The burden 58 豳 is 'K ::' Erbu __I_i —. Fang _ 6. The scope of patent application 1, a naturally decomposable disposable tableware, which includes: a composite material layer to form the disposable tableware The entity, including the stomach, has:.: A powdery substrate made of cereal rind, and its composition weight percentage is 47.5% ~ 53. C a C 0 3; C a 1 cium Carbonate), with a composition weight percentage of 251¾ ~ 31¾, to fill the gaps in the composite material; and an adhesive, which is polyvinyl alcohol (PVA; P ο 1 yv 1 ny 1 Alcohol), with a composition weight percentage of 19% ~ 2 5 °, using water as a medium to bond the substrate and the filler together by bonding; and a waterproof layer by means of It is formed by coating epoxy resin (e ρ ο X yresins) or a vinyl-based water-based waterproofing agent, and the waterproofing layer is distributed on the surface of the disposable tableware used to hold food and contact with food to protect the The composite material layer is not decomposed by water or other ingredients. 2. Naturally decomposable disposable tableware as described in item 1 of the scope of patent application, wherein the disposable tableware is a container or a tableware with a shallow depth. 3. Disposable tableware that can be naturally decomposed as described in item 2 of the scope of patent application, where the disposable tableware is a dinner plate = 4. Disposable tableware that can be decomposed naturally as described in item 2 of the scope of patent application, where the Disposable tableware is a bento box. 5 '— a kind of natural decomposable disposable as manufactured in the scope of patent application On page 17, the public share 58 is 'K ::' Erbu __I_i —. Fang _ 6. Application scope of patent 1, a naturally decomposable disposable tableware, which includes: A composite material layer to form the The entity of disposable dishware, including the stomach, has:.: A powdery substrate made of cereal rind, its composition weight percentage _ 47% to 5 3?, 0; a filler, which is a hindrance Sau (C a C 0 3; C a 1 cium Carbonate), with a composition weight percentage of 251¾ ~ 31¾, to fill the gaps in the composite material; and an adhesive agent, which is polyvinyl alcohol (PVA; P ο 1 yv 1 ny 1 Alcohol), with a composition weight percentage of 19% ~ 2 5 °, using water as a medium to bond the substrate and the filler together by bonding; and a waterproof layer, It is formed by coating an epoxy resin (e ρ ο X yresins) or a vinyl-based water-repellent water-repellent agent, and the water-repellent layer is distributed on the disposable tableware used to hold food and contact the food. In order to protect the composite material layer from being impregnated by moisture or other components, the composite material layer is decomposed. 2. Naturally decomposable disposable tableware as described in item 1 of the scope of patent application, wherein the disposable tableware is a container or a tableware with a shallow depth. 3. Disposable tableware that can be naturally decomposed as described in item 2 of the scope of patent application, where the disposable tableware is a dinner plate = 4. Disposable tableware that can be decomposed naturally as described in item 2 of the scope of patent application, where the Disposable tableware is a bento box. 5 '— a kind of natural decomposable disposable as manufactured in the scope of patent application Page 17 415886 (1) Method for tableware for patent application, including: (1) providing a micro-adhesive composite material, which includes the following steps: '(1-1) grinding out the hulled cereal grains into A powdery substrate; (1-2) stirring the powdery substrate with a calcium carbonate and a polyvinyl alcohol at a weight ratio of 5: 2.8: 2.2; and a homogeneous mixture; and ( 1-3) mixing water and the mixture according to a weight ratio of 1: 2.5, and stirring into a slightly viscous composite material; (2) calendering the composite material into a sheet shape; (3 ) Forming the sheet-shaped composite material into the disposable tableware by a molding process; (4) drying and initializing the disposable tableware; and (5) forming a waterproof layer on the disposable tableware and The contact surface of food contact is applied for patent application No. 5 (special scope)-7 Naturally decomposable, disposable, tasting method, wherein the composite material is water-containing and slightly sticky. 1. Please request item 5 of the scope of the patent _ Preparation of Qin towels Disposable tableware that can be naturally decomposed, its special 1-1) does not include the step of cereal purification. «. · · —— · · '8 > t: Hard 丨 h Fen said: T. 1 Continued η Natural decomposition of disposable meal ^ method, ▲ in the powdery base Page 18 415886 VI. Scope of patent application 30% of the 7 100 100 screeners are those who can pass 50 divisions. 9, F patent application scope of the 5th system: a method that can be naturally decomposed, disposable, and can pass 60%, such as the powdery base in 奚 'materials, the calcium carbonate and the polyvinyl alcohol. Permissible change in either The amount is ± 3%. , Such as the application of the scope of patent application 5 t in The allowable fluctuation of water and compounds is ± 0.5. The scope of patent application 5f wins: 丨 _ The natural decomposability of temptation 2; the thickness of the material is 0 · 8 mm ~ 1 · 3 _ The scope of patent application 5th ring: described System. Qingru 4 丨 The method of ash-free 'tableware' which can be decomposed naturally % 4 J step (:: 3) is a preliminary description of the use of a suction mold with a preset tableware shape, which is directly drawn on the mold using negative pressure to draw the disposable meal. , 'If applying for patent No. 5 of the natural decomposable no-wash method, H-step also includes trimming the :::: 辱 ，. 稳 P 舞 升 之 # extreme body patent scope iC 梨 a.vi/ ^ ... 一 | U ^ (4) of the naturally decomposable disposable tableware is dried under the condition that the suction mold is maintained at a negative pressure, and dried by hot air at a temperature not exceeding 200 ° C to the final shape. If you want to apply for the 5th scope of the patent, please specialize _ -M in this step Page 415 886 Page 20