TW528585B - Air-permeable single-use fresh container and method for making the same - Google Patents

Abstract

The present invention relates to an air-permeable single-use fresh container and a method for making the same; a thin wood sheet is used as a main substrate; the method at least comprises: (1) destructuring the wood tissue: twisting the wood fiber in up, down, left, right, and crossing directions; (2) coating a non-toxic adhesive: enabling the surface of the thin wood sheet to absorb or immerse in a non-toxic adhesive; (3) thermal pressing for lamination: enabling the coated thin wood sheet with fibers oriented in different directions into an integral body; (4) vapor wetting: moisturizing the thin wood sheet to soften and flex; and (5) forming by thermal pressing: deforming the thin wood sheet into the shape of a container. The abovementioned steps enable most wood fibers to be complete without breakage so that the fiber tube is still able to maintain its natural air-permeable functions; the combination of the air-permeable functions and the water repellency of the adhesive layer enables the invented fresh container having air permeability and water repellency to become an ideal single-use fresh container.

Description

528585 V. Description of the invention α) [Technical Field] The present invention relates to a one-time fresh container and a method for manufacturing the same, and particularly to a wood thin film-based substrate that can mass-produce fresh containers that have both air permeability and water resistance. Manufacturing method and finished products. [Background of the Invention] The so-called one-time or single-use of the present invention refers to the method of using fresh produce containers that are immediately discarded after being used. At present, almost all of the meat counters in general fresh supermarkets are single-use The Polyuron container is used to hold fresh products, and a layer of transparent plastic film is wrapped on the fresh food. This kind of packaging looks beautiful and clean, but it is not sanitary. The following problems are hidden in it: 1. Polyurethane It is a polystyrene (Polystyrene, PS) foam product. Polystyrene is a plastic raw material extracted from petroleum. It is composed of carbon and hydrogen. Its chemical formula is (C 8Η 8) η. After adding a foaming agent and heating, it can be made into a variety of disposable tableware, fresh trays and instant noodle bowls. , Burger boxes and other containers. The annual output of Baolilong tableware is about 9,000 tons. In a landfill, it will not be automatically decomposed even after being buried for decades. Due to the fact that Polyron's products cannot be decomposed automatically in the landfill process, it will form a huge environment of large-scale wastes and become one of the culprits in shortening the life of the landfill. At present, environmental groups in various countries have called for reducing the use of Politron products.

Page 4 528585 V. Description of the invention (2) 2. Fresh food is easy to spoil in airtight containers. Although meals made of Polyurethane have good leak resistance, they are not breathable at all. Therefore, Polyuron is not an ideal raw material for fresh food containers (such as fresh food trays or containers used in Japanese restaurants). Of course, in addition to Poloron materials, there are currently alternative environmentally-friendly materials such as paper plates and paper cups; however, because of the practical problems of soup or beverage leakage, the surface of paper plates and beverage paper cups Usually another layer of plastic PE film or chemical wax is applied. In this way, although the problem of poor leakage resistance of the paper product can be solved, it also completely loses its breathability. Obviously, the currently known paper containers and their manufacturing methods are not suitable for producing air-permeable fresh containers. The main reason is the lack of air permeability required for fresh containers. There is another material that is expected to replace the aforementioned Poloron products, that is: plants; for example, common wood and bamboo have good breathability and water resistance. Since ancient times, steamers, wooden buckets, water scoops or bath buckets that people still prefer to use are enough to illustrate the potential of developing wood or bamboo for fresh containers. Anyone who has used thin wood chip lunch boxes knows that compared to plastic or metal lunch boxes, the dishes in thin wood chip lunch boxes are less likely to have the weird taste. Why, because wood chip lunch boxes have good ventilation characteristics, but plastic and metal lunch boxes do not.

Page 5 528585 V. Description of the invention (3) Although the industry knows that wooden containers have many advantages that plastic and metal products do not have, the world still lacks a cost-effective method to quantify the production of various shapes, Breathable and water-resistant wooden container. Taking the production of thin wood chip lunch boxes as an example, according to the current technical level, only rigid methods can be used to complete the rigid box-shaped body. Due to the single fiber direction of thin wood chips, the transverse strength is very fragile and fragile, thus forming a mass production obstacle that is difficult to break through. In order to solve this obstacle to mass production, Taiwan has already created a "structure improvement of thin wood chip lunch boxes" (please refer to Taiwan Patent Bulletin No .: 3 6 3, 3 5 6). As shown in Figure 1, the key point of this patent is that each predetermined crease 1 2 of the thin wood chip lunch box 10 is reinforced with sewing stitches 1 1 to prevent the wood chips on both sides of the crease 1 2 from folding. Occasionally cracks. As far as the basic purpose of the present invention is concerned, the structural improvement of the above-mentioned thin wood chip lunch box justifies the following two problems: 1. Modeling problem: The shape of the general fresh container on the market, as illustrated in the fifth figure The shape has a considerable degree of three-dimensional change, unlike the thin wood chip lunch box, which is simply a flat plane fold, which can be reinforced in advance by using sewing stitches on each crease. Second, the problem: the production steps and structure of the lunch box, basically the first

Page 6 528585 V. Description of the invention (4) Cut through the knife mold, and then press to form a crease. After folding, it is then bonded with an adhesive to form a lunch box. Such a thin wood chip lunch box manufacturing process does not involve and lacks instructions on how to overcome chipping of the wood chip during compression molding. Therefore, it cannot be used to make other container shapes (such as the container shape shown in Figure 5). Regarding overcoming the above restrictions on shape, Japan's "Misawa House Co., Ltd." has invented a manufacturing method for wood chip bonding products (Taiwan Patent Bulletin No .: 4 1 2, 4 7 1). The resins are mixed and kneaded together, and then pigments are added, and extrusion or injection molding processes are used to form products with wood grains on various surfaces. But at best, this method can only produce fresh containers with a shape but no ventilation function. Why? Because the wood fiber inside is broken and broken during the crushing process, and all the gaps are filled with resin, it is completely impermeable. In order to produce a fresh container with a variety of shapes, air permeability and water resistance, the original non-stretchable wooden substrate must have good ductility, so that the mold can be hot-pressed. After numerous trials and improvements, the present invention has successfully invented a method for manufacturing a fresh container using wood as a main substrate, which can be used for industrial mass production. [Summary and purpose] The main purpose of the present invention is to create the ductility of wooden substrates, and to make it suitable for mass production of fresh containers with abundant shape changes, air permeability and water resistance.

Page 7 528585 V. Description of the invention (5) The breathable single-use fresh container provided by the present invention and its manufacturing method are based on wood flakes. The manufacturing steps may include at least: 1. Destroy the wood The original state of the tissue: the wood fibers in the tissue are forced to be distorted or dislocated up or down; 2. Coating non-toxic glue: the surface of the wood sheet is absorbed or impregnated with a layer of non-toxic glue; 3. Hot press gluing : Integrate wood flakes with different fiber directions after gluing; 4. Steam wetting: make the wood flakes damp and soft so as to improve its plasticity; and 5. Hot pressing: deform the wood flakes into the shape of a container. Although the steps taken by the present invention maintain the integrity of most of the fibers in the wood material, they also distort or displace the top, bottom, left, and right, so that after the multilayer wood material is glued together, it will produce a good Combination and ductility, and let the wood fiber (middle fiber tube) contained in the material continue to provide its natural ventilation function. This ventilation function combines the natural water-repellent properties of the adhesive layer, which will make the produced fresh. The container has both air permeability and water resistance, and has become a disposable fresh container that can be mass-produced and has close to ideal characteristics. [Specific implementation example]

Page 528, 585, Description of the invention (6) As shown in the second figure, the specific embodiment of the manufacturing method according to the present invention (please refer to Figures 3 to 5), _ use the wood sheet 20 to produce containers ΰ The four manufacturing steps may at least include: destroying the original state of the woody tissue (6 丨): one of the woody tissues 2 丨 is forced to twist, or displace up, down, left, and right; ^ cloth non-toxic glue Agent (6 2) · Make the surface of wood sheet 20 absorb or impregnate a layer of non-toxic glue 30; ~ Hot-press gluing (63): Hot-gluing wood flakes with different fiber directions after gluing into a composite Thin wood chip 40; Fourth, air wet (64): make the composite thin wood chip 40 wet and soften, so as to improve the plasticity of the composite thin wood chip 40; and five, hot pressing (6 5): make the composite The veneer 40 is deformed into the shape of a container 50 in a mold. Although the known example of this shell takes wood sheet 20 as an example, according to the generally known wood processing technology, it can also be replaced by bamboo or other thin sheets of plants containing medium and long fibers. The thickness of the wood sheet 20 is 0.5 to 1 millimeter (mm), and the right side is preferable. After comparing the many tree species by the inventors, it was found that an artificial forest tree with a scientific name n ALABAZI A FALCATA1 ’(provisional translation of the Chinese name: Xinwang Wood)’ is the most suitable for planing such thin wood sheets. 2 The step of destroying the original state of the wood tissue (6 丨) can be performed on the wood sheet 20 using a rolling machine or a roller. The wood fibers 2 2 in the wood tissue 21 are forced to twist up, down, left, or right. dislocation. Please refer to the third figure (A)

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It is shown that the naturally parallel wooden fibers 22 in the original wood tissue, after being destroyed by the machine, become the state of being twisted or dislocated up, down, left, and right as shown in the third figure (B). V. Description of the invention (7) After the previous step of Yuancheng, the user advances the treated wood sheet 20 / one step of coating non-toxic adhesive (62): the surface of the wood sheet 20 is absorbed or 1 is dipped in a layer Non-toxic glue 30; preferably, this step can be carried out by first drying the wood sheet 20. The so-called non-toxic glue 30 can use Gongfeng μ. Stay in h U grade (yuanquan non-toxic) glue. This water-soluble glue is quite time-honored, but it will not damage the wood sheet 20. Breathable, suitable for the process of using two or seven human lunch boxes or fresh containers. When missing, in the future # '人 么 * $ 你 田 ..., there is a new glue on the right side of the wood, ", and those who do not require it, are also considered alternative glues. ^, Following the performance of McCaw Fourth As shown in the figure, the pressing pressure ^ ^ ^ ^ ^ ^ ^ ^ ^ The layer of wood sheet 20 is overlapped and laminated in different fiber directions, = ί = 22 has been forced to ... Man-made 彳 = Two pieces of wood thin composite veneer with an original thickness of 0.5mm ^ 1 may have only 0.8 sheets thick and about 20 weight. This composite veneer sheet 40 is made of wood with different fiber directions. In the second way, the wood fiber 22 between the taxi, the bottom, the left, and the right is sub-glued in a very complicated manner, thus producing a ductility not found in ordinary wood chips.

Page 10 528585 V. Description of the invention (8) Treatment of gas wetting (6 4): The composite veneer 40 is dampened and softened, so that the plasticity of the composite veneer 40 can be improved. Finally, the composite veneer sheet 40 is subjected to f ® forming (6 5) treatment, so that the composite veneer sheet 40 is deformed into a shape with a valley of 50 in the mold. Preferably, the hot-pressing temperature of this step can be controlled so that the medium = mc ~ 250 ° C (preferably in the implementation of 250 ° C), so that the non-toxic adhesive 30 is accelerated hardened, so that The entire container structure is shaped and water-repellent. [Effect of the invention] According to the manufacturing method of the present invention, the ductility of the wood material can be created. This ductility can smoothly deform and deform the material during the molding process of the cavity without = failure and rupture. Therefore, it is possible to quantify the production of rich changes in shape The freshness of the wood is kept the same. Because the method of the present invention only disturbs the wooden group, but does not break the wood fibers therein, the material length j = the original shape is still continuous. Hot rice, under the capacity: m traces of ticks, which is a proof that the heart-shaped state is breathable below you Helun of the present invention. Although the present invention has been used to better define the present invention 'any familiarity': ::: as above: but its purpose is outside the spirit and scope of the present invention, the artist of the month Make some equivalent design

528585 V. Description of the invention (9) Design and retouching; the inventor's right to claim these equivalent designs should still be included in the scope of patent application of the present invention. Page 12 528585 Brief description of the drawing The first picture, the improvement of the structure of the thin wood chip lunch box (Taiwan Patent Publication No .: 3 6 3, 3 5 6). FIG. 2 is a flowchart of an embodiment according to the present invention. The third figure (A) shows the possible state of the wood fiber before the original state of the wood tissue is destroyed. (B) shows the possible state of the wood fiber after the original state of the wood tissue is destroyed. The fourth figure, (A) shows the possible installation state of the wood tissue with different fiber directions before lamination. (B) shows the possible state of the woody tissues with different fiber directions after lamination. Fifth, a schematic diagram of a container that can be produced according to an embodiment of the present invention (the shape limitation of known wood chip materials has been broken). [Element code] 10 Thin wood chip lunch box 11 Sewing thread 12 Crease 20 Wood chip

Page 13 528585 Simple illustration of the diagram 21 Wood texture 22 Wood fiber 30 Non-toxic glue 40 Composite thin wood piece 50 Container 61 Damage to the original state of the wood texture 62 Coating non-toxic glue 63 Hot pressing glue 64 Steaming and moistening 65 Hot pressing

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Claims (1)

528585 VI. Scope of patent application 1. A method for manufacturing a breathable single-use fresh container, which is a manufacturing step of using a wood sheet as a substrate to produce a container, which may include at least: Destructing the original state of the wood tissue of the wood sheet Coating non-toxic glue: the surface of the wood sheet absorbs or impregnates a layer of non-toxic glue; thermocompression gluing: making the wood sheets superimposed in different fiber directions and pre-compression bonding to make a composite thin wood chip; four Steam wetting: The composite thin wood chip is dampened and softened, so as to improve the plasticity of the composite thin wood chip; and five hot pressing forming: The composite thin wood chip is deformed under pressure in a mold to become a container shape. 2. The method for manufacturing a breathable single-use fresh container as described in item 1 of the scope of the patent application, wherein the wood sheet is made from a forest tree (also called: Xinwang wood) named “ALABAZIA FALCATA” 3. The method for manufacturing a breathable single-use fresh container as described in item 1 of the scope of the patent application, wherein the step of destroying the original state of the wood tissue is to force the wood fibers in the wood tissue to be twisted. 4. The method for manufacturing a breathable single-use fresh container as described in item 1 of the patent application scope, wherein the method further includes a step of drying the wood sheet before applying the non-toxic adhesive. . Page 15 528585 VI. Patent application scope 5. The method of manufacturing a breathable single-use fresh container as described in item 1 of the patent application scope, wherein the step of destroying the original state of the wooden structure is using known rolling The implement is performed on the wood sheet. 6. The method for manufacturing a breathable single-use fresh container as described in item 1 of the scope of the patent application, wherein the original thickness of the wood sheet is between 0.5111111 and 1.0 mm. 7. The method for manufacturing a breathable single-use fresh container meal as described in item 1 of the scope of the patent application, wherein the processing step of the hot-press gluing is controlled by hot-pressing at 120 ° C to 160 ° C temperature range. 8. The method for manufacturing a breathable single-use fresh container as described in item 1 of the scope of the patent application, wherein the hot-pressing temperature of the hot-pressing process step is controlled in the range of 200 ° C ~ 2 5 0QC . 9. The method for manufacturing a breathable single-use fresh container as described in item 1 of the scope of patent application, wherein the hot-pressing temperature of the hot-pressing processing step is controlled at about 250 ° C. Page 16