TW200528268A - Method for manufacturing a self-venting composite film for heating food package - Google Patents

Abstract

A method for manufacturing a self-venting composite film for food package is disclosed. The composite film comprises a base layer material with a plurality of micro gaps, which adheres to another sealing layer through an adhesive layer. It can be applied to an airtight package in either bag pack or in container pack. Foodstuff can be closely packed in a refrigerated or frozen status and be heated up directly with a microwave oven. During microwaving, this composite film regulates the heated and pressurized steam without the bursting the closed pack film. This composite film is suitable for airtight food package with longer shelf life. Packed frozen food can be cooked directly from freezer to microwave oven without prior defrosting or pre-opening the package to prevent bursting during cooking. Moisture preservation is another feature with this film, which prevents the packed foodstuff from drying and losing the flavor.

Description

200528268 V. Description of the invention (1) The present invention relates to a composite film and a manufacturing method for a food heating automatic pressure-adjusting packaging device, especially applied to various food packaging boxes or bags after being filled with cold-killed and refrigerated food It is hermetically sealed, which can partially adjust the high-temperature circulating steam generated during the microwave heating process to ensure and avoid cracking of the box or bag of the packaged food, and to ensure that the high-temperature steam does not lose a large amount and maintain the deliciousness of the food. Composite film for packaging device with automatic pressure regulation. Since ancient times, most foods have been cooked by fire-baking, high-temperature boiling or steaming. Energy-efficient microwaves have been used to heat or cook foods for more than 50 years. Among them, countries with a high degree of industrialization have higher rates of cooking and heating foods in ordinary homes, schools, restaurants, or other public places with the demands of convenience and speed. Microwave electromagnetic wave (Micr 0wave) heating food principle is based on the nature of the dipole moment inherent in the polar molecules of each component in the material being heated, in order to align with the magnetic field in the microwave electromagnetic vector field, so intense vibration or Slewing motion. The material uses its own damping effect to convert the vibrational energy of the dipole moment into heat through friction dissipation, so as to accumulate and increase the internal energy energy in the overall system, which causes the temperature of the system containing the material to rise. Generally speaking, The higher the intensity of the dipole moment or the higher the relative dielectric constant of the material composition, the higher the ratio of converting electromagnetic wave energy to thermal energy, which means that the better the heating effect of the material and the faster the rate of heating. The relative permittivity of pure water is close to 80 at room temperature, and the permittivity of polyethylene is 2.51 at room temperature. Therefore, water-containing food is coated in polyethylene packaging materials and is exposed to microwave electromagnetic fields.

Page 7 200528268

= Heat, =, the microwave electromagnetic energy of the moxibustion part is converted from the water component to heat energy. 'The heating and heating in the 02 heating system is mainly food, but the packaging material: the conversion ratio is low, and the material itself has less heating. In addition, the microwave has the penetration characteristics of the electric interference wave, which can penetrate to any corner of the substance, heat the object, and dissipate the vibration energy and damping (Damping) into the principle of the system to increase the system. The better the molecular damping heat conversion efficiency is, the better the fruit is. The better the heating and heating effect of the article, the microwave equipment is often used in the industrial and consumer markets to heat, dry, and text 'for baking and sterilization' processing applications. The commonly used heating microwave frequency is 915 million hertz (MHz) With the electromagnetic wave of 245 million hertz (MHz), in addition, the relative permittivity value of food materials and microwave heating temperature and microwave frequency are related. The rapid loss of water and the drying and drying of food are two major problems often encountered in the process of heating and cooking foods with microwaves. This is due to the high dielectric constant and high volatile components (such as water) in foods. Material components can convert microwave electromagnetic energy into heat energy in a microwave field. This temperature rise causes high volatility and high vapour pressure characteristics of the material components to be easily heated and quickly volatilized and transferred out, which makes the food dry and hard and loses its deliciousness.

In the microwave heating application market, the more commonly used packaging materials for microwave ovens on the market include wrap film, microwave bags and trays, etc. The raw materials used in the packaging materials include polyethylene (PE), polypropylene (PP), polyamide (nyoni), polycarbonate (PC), polyvinyl chloride (PVC), polyvinylidene chloride (pVDC), polymethylpentene (PMP), ethylene vinyl acetate Vinegar

200528268 V. Description of the invention (3) EVA), polyurethane (PU) or SurlynTM (brand name of Dupont i onomer), polyethylene terephthalate = polyethylene terephthalate (PET), polymer Materials such as vinyl alcohol (PVA), paper, synthetic paper, cellophane, cellophane, ceramic, glass, or a combination of the above materials can be a single structural layer, a composite multilayer structure, Foam structure and so on. In practice, in order to facilitate the manufacture of such packaging materials, the packaging industry will add some plasticizers (plasticizer a d d i t i v e s) to the packaging product manufacturing process. Therefore, the additives on food packaging materials can cause food to be contaminated and harm the health of the packaging, storage, transportation or microwave cooking process, because direct contact with food often occurs. In view of this, 'American Food and Hygiene The requirements and restrictions on food packaging materials by the Management Bureau (FDa) and the National Bureau of Health and Health Standards have become increasingly stringent. In addition to the requirement that food must not be contaminated by packaging materials, specifications for the temperature resistance characteristics and low and high temperature cracking of packaging materials at high temperatures have been added. In the past 3 years, the knowledge and economic level of ordinary consumers have greatly improved, more than micro, energy efficiency, convenience and speed of cooking and heating, etc. have also been relatively improved. Therefore, the search and development of microwave-specific foods suitable for different thicknesses, low cost, and easy to use ^: has become the goal of the current food packaging industry to concentrate on improvement and efforts. phenomenon

Page 9 200528268 V. Explanation of the invention (4) In addition, when the sealed packaged food is heated by microwave, the packaging bag often explodes due to rapid temperature increase and pressure increase in the sealed space. In order to avoid gas explosion, general food packaging manufacturers recommend that before using a microwave oven to heat or cook food, an opening must be reserved in the packaging bag or tray to allow the high-temperature and high-pressure gas generated during the cooking process to escape. Pressure to avoid explosions. American Zippoc company's microwave-freezable food packaging on any bag has taught its users that before using the microwave oven, they must open a vent hole in the bag to avoid explosions and accidents. Such an application places the food subjected to the microwave heating process in an open space, and the volatile components in the food are largely lost due to heating during the heating process, which causes the food to dry out and lose its flavor. Regardless of whether the aforementioned traditional food packaging bags are completely sealed or detachable, they can be packed in any bag. If the food is placed in a closed packaging space and heated in a microwave oven, the temperature of the closed food will increase and increase over time. Eventually, the pressure in the bag will reach the critical tensile strength that the packaging material can withstand, and the packaging material will be destroyed in an explosive manner. At the same time, a large amount of water and gas will be lost, and the food will be dehydrated and become unpalatable. Furthermore, when you want to heat cooked flour-related foods, such as steamed buns, dumplings, spaghetti 11 (spaghe 11 i), etc., the general method of use includes using a steam oven (steamc ο 〇ker) or food wrap and using a microwave oven to Heat. Although the former can get the results of gourmet, but the flour food may swell or mash when it absorbs too much water; while the latter is clad with cling film to save time, but the food is heated by the microwave, and the moisture inside it will go out quickly Loss, because the cling film is not water permeable, plus its own low dielectric constant material

Page 10 200528268 V. Description of the invention (5) In the microwave heating process, the heat conversion rate of microwave energy is lower than that of food materials with high dielectric constant, and the temperature of the cling film itself will be lower, so these transfers The water vapor will condense at the interface where the food is in contact with the cling film, causing the part of the food covered by the cling film to bluff, and the uncovered part to become dry and hard, so that the food becomes unpalatable. . In order to prevent food packaging materials from being used in microwave heating applications, the problem of closed packaging heating, heating, and gas explosion has occurred. From early to present, research and development work has continued. Many different types of breathable materials have been developed, but most of them are concentrated in wastewater. Filtration, air purification filtration, paper diapers are hygroscopic, wet paper towels, breathable medical supplies, etc., but they are not suitable for microwave heating applications of food packaging. One of these conventional breathable materials manufacturing methods, such as U.S. Patent Nos. 3,3 7 8,5 0 7,3,3 1 0,5 0 5, 3,607,793, 3,812,224, 4,247,498, 4,466,931 and 5,9 2 The technology disclosed in case 8, 5 8 2 includes the use of incompatible materials to form a film, and then using an extraction method to dissolve one of the components to form a hole-like structure. This type of breathable material is mostly used in Filtration and separation, such as the separation membrane (separat 〇r) in the battery that allows the electrolyte to flow, and the isolation dialysis membrane (dialytic film) for pure water purification or desalination, because the mechanical strength of the material layer is inversely proportional to the porosity By the way, this material is used in microwave food packaging applications, and there is still an explosion phenomenon during the microwave heating process, and when there are too many unextracted residues, the microwave heating process is prone to be due to its higher dielectric constant value. Heat is generated during the conversion of microwave energy into heat

Page 11 200528268 V. Explanation of the invention (6) The heat spot causes the packaging material to be partially melted and penetrated by heat, so the volatile components in the food are greatly lost. This material is not suitable for microwave food packaging and the manufacturing cost is extremely high. High and complicated extraction solvent recovery procedures. Another type of breathable material, such as the technology disclosed in U.S. Patent No. 5,8,65,9,26, is to use a non-woven or fiber cloth having breathability. However, these methods will make the breathable film have macroporous characteristics. Most of them are used in applications such as paper diapers and wet tissues. They are not suitable for microwave food packaging and have high manufacturing costs. There is also a conventional method for manufacturing breathable materials, such as U.S. Patent Nos. 3,679,540, 4,187,390, 4,350, 655, 4,466, 931, 4, 7 7 7, 0 7 3, and 5, 3 4 The technology disclosed in the 0,6 4 6 case, by mixing inorganic material powders, such as calcium carbonate (C a C 03), titanium oxide (τ i 02) or aluminum oxide (A 1203), to the organic high Molecular materials, such as polyethylene, are then extruded into a film. The film forming method includes a method of using a concentric circular die (d i e) extrusion injection method to obtain a cylindrical pull bag or blow bag, an extension tenter (tenter), or extrusion injection. Next, the film is stretched and stretched at a processing temperature below or near the softening point of the material. Although this manufacturing method can produce micro holes, the manufacturing cost is too high and the difficulty is high. At present, this type of product is not practical. It still has an explosion phenomenon during the microwave heating process. Similarly, Most of the added inorganic salt additives belong to a material with a low specific heat and a high dielectric constant. In a heated environment, it is easier to form a local he at spot, which may melt through the package material. It is worth noting that this manufacturing method will lead to inconsistent quality control of breathable films, such as elongation, processing temperature, etc.

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Page 12 200528268 V. Description of the invention (7) Degree, film thickness, and raw material formula will all lead to inconsistent pore sizes, and the use of additives will have different effects on the subsequent environment, for example, it may cause environmental protection problems. In addition, it is limited by the selectivity of the film material, and the film is often not transparent after being formed due to the multiple phases of the additives. Furthermore, a stretching step is required. In addition, when this breathable material is applied to food packaging, there is a concern that additives may contaminate the packaged food and cause unpleasant odors (u η p 1 e a s a n t odors). This type of breathable film cannot effectively block oil and alcohol when it comes in contact with food containing oil or alcohol, so it will be impregnated with oil and alcohol due to capillary adsorption. The further effect is that when this breathable film is applied to food packaging and inside Containing a pouch of oxygen scavengers will cause the oxygen scavenger ingredients to be contaminated with oil and alcohol, which will not achieve the function of keeping food fresh. Generally, food is a kind of heating process during heating or cooking process. When microwave oven is used for direct heating, microwave heating often uses higher dielectric constant components such as water contained in food to effectively borrow the microwave co-vibration effect with the material itself. Damping property can convert microwave energy into heat to heat or cook the food itself. In this way, the microwave heating process causes the water temperature to rise and the internal vapor pressure to increase, because it contains low specific heat characteristics. When this breathable film When it is used to wrap food, the material is in the microwave heating process, so it is easy to generate a heating spot under short-term concentrated heating, and it dissolves into larger holes, which leads to more leakage of gas and liquid in the package. It is very powerful. In addition, during the process of filling articles and high temperature sterilization, this breathable film is easily peeled off.

Page 13 200528268 V. Description of Invention (8) Therefore, the industry continues to develop and produce traditional food packaging bags or boxes that are prone to blasting problems, in order to launch a variety of breathable food packaging boxes or bags. In order to package frozen and refrigerated food for microwave heating, there is no need to open the film layer; however, the food storage box or bag body of this breathable food has a short storage period, because it is usually impossible to perform vacuum packaging or filling The modified atmosphere packaging (MAP) process of carbon dioxide (C02), nitrogen (N2) and other inert gases is used to extend the shelf life of food. In addition, the inventor has been improving the packaging bag or box for microwave heating of food. Among them, the inventor applied for and approved the invention in the early 5 2 2 1 2 3 bulletin "Packing bag and manufacturing method" "Invention case, this breathable composite film material as a packaging bag for microwave heating of food can improve the shortcomings of conventional breathable materials and provide the characteristics of convenient operation and use, and at the same time can ensure the moisture contained in food during microwave heating. The large amount of juice retained in it will not be sprayed into the microwave oven, reducing time-consuming cleaning and waste of water resources. More importantly, this reversible automatic breathable pressure-regulating packaging material is in a closed structure before microwave heating; during the heating process, the vapor pressure that the packaging material itself can carry can be automatically adjusted to avoid the packaging material bursting; in microwave heating When the cooling process is stopped, the material will return to a closed structure. This reversible structural property related to pressure and temperature makes the material reusable, which is very different from the traditional single-use destructive microwave heating method in which a food packaging bag is opened in advance or an opening is cut.

Page 14 200528268 V. Description of the invention (9) The main purpose of the present invention is to provide a composite film and a manufacturing method for a food heating automatic pressure-adjusting and packaging device, especially for various food packaging boxes or bags, which After freezing and refrigerating the food and sealing it tightly, the packaging device can keep hermetically sealed packaging and direct freezing during normal storage and transportation. When eating, it can be directly taken out of the freezer and conditioned by microwave, boiling water, steamer and other heating methods. Food and edible make this different from traditional sealed food packaging. Before heating and conditioning, such as microwave oven heating, the packaging tray or bag container or piercing hole must be opened in advance to avoid the closed gas explosion during heating. The invention provides a revolutionary packaging concept for frozen and refrigerated food vendors with time-saving, convenient, and energy-saving demands. Office workers or students can directly select frozen and frozen foods of various flavors they need from supermarkets or restaurants. In the freezer, just take it out of the freezer and put it directly in the microwave Enjoy the warm to hot food. The present invention belongs to the applicant team's further extension of the original core invention patent technology to create products and technology applications. Its core technology has recently obtained the Republic of China Invention Patent Bulletin Nos. 482722, 522123, and 542812. How to prepare the invention Automatically adjust the pressure packaging device. In the process, various technologies are applied, such as special micro-crack structure rolling wheels, plastic coating machines, corona surface treatment machines (coating machines) and coating machines ( coating machine) and other integrated applications, in which the special micro-crack structure rolling wheel set is mainly used to prepare the key reversible adjustment pressure substrate film layer in the automatic pressure adjustment packaging device of the present invention,

Page 15 200528268 V. Description of the invention (ίο) In the manufacturing process, it is formed by rolling the substrate film layer and forming a plurality of micro-gap structures on the substrate film layer. In addition, it is used to adjust the degree of high-temperature vapor pressure. The demand can be determined in the design by controlling the number of cracks, shape, distribution density, distribution position, thickness of the substrate film and the material of the substrate film on the substrate film layer. The processing equipment can adopt continuous pressure rollers or batch pressure rollers. It is especially economical for the former under the demand of automation. Among them, one of the rollers or rollers or one platform The surface has a plurality of spiky structures, and the spiky structures can be prepared by the following methods: (1) high hardness sharp convex wire brush (needle roller); (2) borrow Electroplating method uniformly plated polyhedron diamond particle powder or similar powder with high hardness on the surface; (3) engraving hard organic, metal or ceramic materials with laser cutting to form a plurality of spiky shapes Knot Structured rolling surface, such as laser-cut ceramic ani 1 ο X roll wheels; (4) using mechanical rolling (tooling) processing method, a metal surface that requires hardness is formed into a desired surface with A plurality of sharp and convex structures, and then by the surface hardening treatment methods such as high temperature tempering, ultrasonic and so on to obtain the final rolling surface required; (5) chemically etch a metal surface into a uniform sharp and convex structure After that, surface hardening treatment is performed to form a hard rolling surface. In addition, the material of the counter pressure wheel or the counter pressure surface corresponding to the rolling wheel may be metal, plastic steel, or ceramic with appropriate hardness. As mentioned above, regardless of the use of electroplated diamond wheels, mechanical processing wheels or surface laser engraving rolling wheels, the rolling processing process makes the structure have multiple micro-cracks (m i c r 〇

Page 16 200528268 V. Description of the invention (11) gaps) structure, micro-crack structure area, here the shape of the micro-crack structure area can be various shapes of cracks. The result is a structure that is inherently breathable. Here, according to actual needs, the rolled film (stabbed fi 1 in) has the required sealing and ventilation function characteristics and structural design. Among them, by selecting appropriate materials and matching different rolling wheels, rolling The optimal combination can be obtained according to the different requirements of the mechanism and the actual application environment. Here, the micro-crack structure area of the present invention can also have different distribution designs due to actual needs. The micro-crack structure area of the present invention can also be There are different distribution designs due to actual needs, such as comprehensive distribution, local regional distribution, regular distribution, or irregular distribution. As to the actual use timing and application mechanism, the end-to-end processed film material , Processing conditions and other factors, very flexible application design. In addition, the protrusions on the cusp rolling mechanism used in the present invention may be a line segment type, a conical type, a pyramid type, a quadrangular pyramid type, a polygonal pyramid shape, a cross column type, or other types. After the rolling process, After the rolling process, due to the viscoelasticity (visc 0e 1 asticity) and memory effect of general polymer materials, the macroscopic structure of the substrate film will mostly return to the plane, leaving only the macroscopic structure. The material structure of the micro-crack structure with permanent damage and deformation can be selectively processed at this time by a calendering wheel set with temperature adjustment control, so that the substrate is flattened back to a false plane with the appearance of most micro-crack structures (P seud ο p 1 a η), most micro-crack structure areas after calendering will also have corresponding line segments, cones, pyramids, square cones, and more on the pseudo plane.

Page 17 200528268 V. Description of the invention (12) Face pyramid, cross-pillar crack shape or other types of cracks or crack shapes. The above-mentioned temperature-controllable over-pressure smoothing wheel set combined with the process can make this easy. The appearance of the tearable substrate is smoother, and the thickness is uniform and beautiful. According to the purpose of the present invention, a composite film for a closed food heating automatic pressure regulating packaging device is provided, which includes a substrate film layer, the substrate film layer has a plurality of micro crack structures, and the geometry of the micro crack structures can be various shapes , The average size of the micro-crack structure is between 0.1 micrometers and 3 millimeters, and the adjacent edges of the micro-crack structure are physically close to each other; another film layer can cover the One side of the plurality of micro-crack structure regions, the sealing film layer is connected to the substrate film layer having the plurality of micro-crack structure regions by another adhesive layer. The adhesive film material used in the present invention can be used for the adhesive layer material coating and laminating process by hot melt adhesive film coating, drying, and laminating process by adhesive liquid, which connects the sealing film layer with a plurality of micro-crack structure regions. Substrate film layer, so that the final composite film layer can be applied to the packaging bag or packaging tray of the food packaging device, at the same time, the packaging device is hermetically sealed at ordinary room temperature or freezing temperature, and the microwave heating process The sealing film layer containing the adhesive layer is penetrated by the high-temperature and high-pressure vapor generated by the heating process of the food contents from the packaging device to penetrate the substrate film layer having the most micro-crack structure area, and acts on the adjacent adhesive layer. , Make it soft and dry rubber, after contacting high temperature water vapor or oil vapor, the surface of the adhesive material can gradually lose its withering characteristics and automatically separate, forming a breathable vent during the microwave heating process

Page 18 200528268

V. Description of the invention (13) Road, so that what is produced in this process is to lift the bag or bag body, and install the function to pack the product. Flat steam can timely ventilate the channel and (pressure keeps the food heated, and it must rupture. There are liquid food packaging applications, nitrogen (N2) and other atmosphere applications, such as the packaging concept, filled with materials and cooked in a food preparation device to pollute the kitchen with a full power and the hot-hot beauty composite film layer. One can adjust the The packaging device avoids the risk of gas explosion by heating the vapor pressure in South Vancouver. The present invention is a food packaging box of the same nature as a microwave heating food package aimed at another creation that the inventor has not improved in the past with various creative products. The invention also has the characteristics of sealing when eating and high-temperature and high-pressure heat generated during the heating process by expanding the presetting = sealing of the junction edge with weaker adhesive strength to guide high-temperature and high-pressure steam through the adjustable pressure area) to External atmospheric pressure, and the product area can continue to effectively serve the traditional closed packaging box or bag microwave under high temperature and high pressure circulating steam Technology in the thermal process, and no leakage of products such as soup due to external pressure during normal storage and transportation, can provide a vacuum or change the packaging environment by filling carbon dioxide (C02), inert gas ( m 0 dified packaging, MAP) process to extend the freshness period of food. This application can provide a brand new cold bed refrigerated food and can be used in any fresh or cooked food. The sealed package of the present invention can also have a long time. Fresh-keeping packaging can be self-cooled when it is processed; the east cabinet is taken out and placed directly in any heating for cooking and conditioning. In practice, it does not need to be decontaminated. It can be heated and used for a short time, energy saving, money saving, non-stick cleaning Finally, provide a nutrient-free, gourmet and food 0 200528268 V. Description of the invention (14) According to the purpose of the present invention, a breathable material for food packaging is proposed. This microwave food special packaging material 'has overcome the existing microwave packaging Material inconveniences and restrictions; the material formula design is very flexible, and environmentally friendly materials can be used completely. After burning, only water and carbon dioxide are generated, and there is no pollution pollution problem. The food is not contaminated by foreign objects. In addition to avoiding this special packaging material in contact with food during microwave heating or cooking, it can also avoid heating and pressurization. The resulting gas explosion phenomenon, the manufacturing method and packaging materials of the present invention have a very wide temperature range, and can be optimized materials according to food characteristics and customer requirements, such as temperature resistance requirements, size and shape of packaging products. Design with specifications. According to the purpose of the present invention, a breathable film is applied to a packaging bag or a tray, and includes the following structures: a substrate film layer is formed in whole or in part by a rolling process to form a plurality of micro-cracked structural regions, and An adhesive layer is laminated on the micro-crack structure area to form a gas-tight sealed structure. When the food in the packaging bag or tray is heated, high-temperature steam and pressure increase, at this time, the immediate adhesive layer will be caused by The solid is softened and gradually detached due to heat, and the film is extruded and deformed by high temperature and high pressure to make the opening space of the micro-crack structure larger. At this time, most micro-crack structure areas gradually become a safe pressure-relief adjustment area with less resistance. It can avoid the instant explosion danger caused by the hot air and steam buildup which are slowly accumulated in the bag due to the heating process. In addition, the present invention has high temperature and air permeability. The packaging bag can directly seal the cooked food and freeze it after cooking.

Page 20 200528268 V. Description of the invention (15) It is prepared for future use. When it is eaten again, it can be placed in a heating device, such as a microwave oven, and reheated directly. After heating the cooked food for a short time, the packaging bag film can be opened. Use the food directly. In order to make the above-mentioned objects, features, and advantages of the present invention more comprehensible, a comparative example is given below, and in conjunction with the accompanying drawings, a detailed description is as follows: Example

The composite film and manufacturing method for the food heating automatic pressure regulating packaging device designed by the present invention, refer to the first, second, and third drawings, which are mainly according to the packaging of various cold and refrigerated food packaging boxes (1). Cover the film layer with a gas-tight material and use a wide field (2 1) wide towel § to coat the layer (3 cloth with viscous as the corresponding surface layer u creep knot this kind of> East and cold heat-producing film layer (2) ' Before the substrate film layer (2) is laminated, the micro-crack structure area with a preset range size is processed for the pressing process. On the side of the micro-crack structure area (2 i) according to the ^ = 臈 layer (2) (That is, corresponding to the micro acoustic seal ^ film layer (3), follow the seal ^

The landing layer (4), such as the structure area (21) in the third figure, is a uniform sentence; the bonding layer is placed on the substrate film to display the sealing film layer (3) and its adhesive layer (4 (as in the second picture), Borrow 2) The micro-fractured structure area (21 with a sealing film layer (3) in the stomach / completed box (1) in the form of a β-tight seal is covered with a substrate film scrap ^ film layer (2) is a tightly-covered cover. In the packaging box (1) where Tibetan food is processed by microwave, the high temperature and high pressure radon inside the package is cold and high (see Figure 4). When the food ",, A 'passes through the base film (2) by j

200528268 V. Description of the invention (16) The micro-fracture structure area (2 1) is set, and the adjacent adhesive layer (4) starts to soften the adhesive gradually and lose the original adhesion due to the penetration by the hot vapor (5). The 'strength' makes the sealing film layer (3) coated with the adhesive layer (4) detach from the substrate film layer (2) from both sides, and the superheated high-pressure steam (5) inside the packaging box (1) will follow The micro-crack structure area (2 j) not covered by the sealing film layer (3) is leaked out to thereby appropriately adjust the heated high-temperature and high-pressure steam according to the ventilation area to avoid the packaging box (丨) When a burst occurs, the high-temperature steam (5) inside the packaging box (1) will not be lost, so that the heated food will not become dry and delicious.

In addition, the composite film for the food heating automatic pressure regulating packaging device designed by the present invention can also be applied to the packaging bag (6) (as shown in the fifth and sixth figures). This packaging bag (6) is resistant to high temperature and airtightness. The composite film for the automatic pressure-adjusting packaging device is designed into a bag body (6 1) according to the design, and is provided with a zipper-type sealing edge (62) at the open end of the bag body (6 1). It can be conveniently sealed after cold Cambodian and Tibetan food. Packing the shape here ^ (6) The film layer that has a pressure-regulating form in ^ Shiji is an air-impermeable substrate film layer that is collected on any of the ^ layers of the bag body (6 1). Let's add: the micro-fracture structure area (6 3) with a preset range size, and the width of the micro-fracture structure area (6 3) of the bag body (6 u) to determine the seal film that must be in its fan garden The layer (7) 'follows the sealing film layer (7)-the side (ie, the crack structure area (6 3) to the deer micro) is uniformly coated with the adhesive layer (8) (such as ^, figure), the seal The composite film layer (7) and the dead layer (8) are corresponding to the surface layer of the micro-crack structure area (63) of the laminated body (61), and the packaging bag (6) is combined with either side of the form Automatic g-adjustment of sealing film layer (7)

Page 22 200528268 V. Description of the invention (17) Laminated film setting. The refrigerated and refrigerated food inside the packaging bag (6) is 'see the seventh figure' when microwave heating is performed, and it is also produced when the food is heated to generate high-temperature and high-pressure steam (9). The micro-crack structure area (6 3) 'is set so that the adjacent dead layer (8) gradually softens the adhesive and loses the original adhesive strength when it is exposed to the penetration of the heated vapor. The sealing adhesive layer (7) of (8) is detached from the bag body (μ) from both sides, so that the superheated steam (9) inside the packaging bag (6) can follow without being covered by the sealing film layer (7). The micro-crack structure area (6 3) is vented outward, and the heated two-temperature south-pressure steam is automatically adjusted according to the ventilation area in time to avoid the explosion of the packaging bag (6) and ensure the packaging bag (6) The high-temperature steam inside does not lose a large amount, maintaining the deliciousness of the heated food. The base film layer (2) applied to the open end of the packaging box (1), or the bag body (61) of the packaging bag (6) contains at least one material, and may be selected from acrylic, Polyesters, polyethylene (PE), polypropylene (polypropyiene, pp), polyamide, ethylene-styrene copolymer (ES), cyclic Olefin copolymer (cyclo olefin), polyethylene terephthalate (PET), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), ethyl acetate Diluted-vinyl alcohol alcohol (EVOH), ionic polymer compound, polyethylene naphtha late (PEN), polyether ketone (poly

Page 23 200528268 V. Description of the invention (18) ether ether ketone (PEEK), polycarbonate (PC), polysulfone, polyimide (PI), polyacrylonitrile (PAN) ), Styrene acrylonitrile (SAN), polyurethane (PU), nylon (nylon), butterfly paper, polymer multi-layer co-extruded stretch film, synthetic paper, cellophane ( glassine paper), polymer-coated paper, paper and other materials or a group of combinations of the above materials. The sealing film layer applied to the above-mentioned packaging box (1) open end substrate film layer (2) or packaging bag (6) bag body (61) whose micro-crack structure area (21, 63) is covered by at least one material The combination is a free olefin polymer (polyolefin), polyethylene (PE), polypropylene (PP), polyester film, polyethylene terephthalate (PET), Polystyrene, polyethylene gas, polyethylene glycol naphthalate (PEN), polyether ether ketone (PEEK), polycarbonate (PC), polyimide (Polyimide, PI), polysulfone, polyacrylonitrile (PAN), acrylic, polyethylene polypropylene copolymer, ethylene-styrene copolymer (ES) , Cyclic olefin copolymer (polyvinyl alcohol, PVA), ethyl acetate (ethy1ene — viny 1 acetate, EVA), ethylene-vinyl alcohol copolymer (ethylene vinyl alcohol, EVOH ), Styrene acryl cyanide copolymer Compound

200528268 V. Description of the invention (19) acrylonitrile (SAN), polyurethane (PU), nylon, nylon, polyamide, ethylene-styrene copolymer (ES), Ionic polymer compound, synthetic paper, waxed paper, polyethylene non-woven fabric, polypropylene non-woven fabric, inorganic materials, plastic film, synthetic paper, multilayer co-extruded stretch film, multilayer composite film, etc. or one of the above materials combined Ethnic group. The sealing film layer may be selected from a group consisting of a plastic film or a composite film of a metal layer, and the metal layer is selected from aluminum or an aluminum alloy. Adhesive layer material applied uniformly on one side of the sealing film layer attached to the packaging box (1) open end substrate film layer (2) or packaging bag (6) bag body (6 1), optional From acrylic polymers (polyacrylics), polyesters (polyester), olefin polymers (polyolefin), polyethylene (PE), polypropylene (PP), cyclic dilute copolymers (cyclo olefin), polyvinyl alcohol (polyvinyl alcohol (PVA), ethyl acetate (ethy 1 ene-viny 1 acetate, EVA), ethylene vinyl alcohol (EVOH), polyolefin derivative adhesive, polyamine polyamide (nylon), polyurethane (PU), polystyrene butadiene copolymer, polyethylene polypropylene copolymer, ethylene styrene copolymer (ES), cyclic olefin copolymer (Cyclo olefin), single-liquid primer, two-liquid primer, rubbers, hot melt elastomers, Shi Xijiao

1 ^ 1 Page 25 200528268 V. Description of the Invention (20) (silicone elastomers), ionic polymer compounds (ionomer), thermoplastic 1 (therma 1 plastic rubber), palm wax, paraffin wax, microcrystalline wax, peak wax, With natural wax materials such as rice bran wax, polyethylene (PE) synthetic soil, polypropylene oxide (pp) wax, polyethoxy resin (PEO) wax, and other petroleum products, mineral oil products, & olefins (Polyolefin), the synthesis of fake oxides, etc. jl synthetic K soil material (man-made wax or synthetic wax), fatty acid (fatty acid) and its derivatives, and starch and its starch-containing & biology, etc. Materials such as materials or a group consisting of the above materials. Wherein, the adhesive layer may be a whole or a part of the adhesive layer to cover the substrate film layer having a plurality of micro-crack structure regions.

For the base film layer (2) or the packaging bag (the micro-crack structure area (2 1, 6 3) provided by the bag body (6 1)) of the packaging box (1), ^ & ) The area of the work area can be selected in whole or in part. ~ D Apply the X layer to the adhesive layer on one side of the sealing film layer attached to the above-mentioned packaging box (1) open end substrate film layer (2) or packaging bag (6) bag suspension (6 1). One method can be using an adhesive material solution for coating, drying, direct hot cloth or hot pressing. Ί For the food heating and automatic pressure-adjusting packaging device adopting the present invention, if the food to be used requires solid content and aqueous solution content, it should be stored separately at normal temperature and refrigerated temperature to avoid the food during storage and transportation ^ / J1DL or

Liquid materials may be deteriorated due to mixing. For example, rice and pasta and spices, solid juice. One practical application example of the present invention is the aqueous solution. The container is sealed with a container such as a sealed packaging bag or a packaging tray. Can be J-filled first, mystery and solid

200528268 V. Description of the invention (21) The body contents can be separated in the thermal process to make water soluble and solid. The special air-permeable material bags of the present invention (back bags or st) Although the present invention limits the scope of protection of the present invention When placed in the automatic pressure-adjusting packaging device, the material of the packaging bag or packaging tray is softened due to the heating of microwave and the liquid is preferentially released from the sealed packaging bag or packaging tray. The mixture is then mixed and then mixed The heating is not here, so it will not be repeated. In addition, the film of the present invention can also be made into various types such as back-sealed bags, gusseted bags, three-sided bags, sealed bags 5 gadget bags, three sides and up pouches) Packaging application bag. The above has been disclosed in a preferred embodiment, but it is not intended to be used by anyone skilled in the art, without departing from the essence of the present invention, it can be used for various modifications and retouching. Therefore, the scope of the patent attached to the present invention is attached The ones defined shall prevail.

Page 27 200528268 Brief description of the drawings. Figure 1 is a schematic diagram of the structure of each component of a sealable and automatic breathable pressure-regulating composite film of the present invention. Figure 2 is a sealable and sealable packaging box. Schematic diagram of the packaging of automatic breathable pressure-regulating structural composite film; Figure 3 is a schematic cross-sectional view of a packaging box that can be sealed and sealed with automatic breathable pressure-regulating component film structure; Figure 4 is a packaging box adhesive Sealable and auto-breathable pressure-regulating structural composite film packaging container, schematic diagram of ventilation and regulating vapor pressure after microwave heating. Figure 5 is a packaging bag combining a sealable and auto-breathable pressure-regulating structural composite film. Schematic diagram of the layer structure; Figure 6 is a packaging bag combining a sealable and automatic breathable pressure regulating structure composite film, before microwave heating; Figure 7 is a packaging bag combining a sealable and automatic breathable pressure regulating structure Schematic diagram of the composite membrane, which automatically breathes and adjusts the high-temperature vapor pressure after microwave heating. Description of figure numbers 1: Packaging box 2: Base film layer 3: Sealing film layer 4: Adhesive layer 5: Hot steam 6: Packaging bag 7: Sealing film layer

Page 28 200528268 Brief description of the drawings 8: Adhesive layer 2 1: Micro crack structure area 61: Bag body 6 2: Zippered sealing edge 6 3: Micro crack structure area

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Claims (1)

200528268 6. Scope of patent application 1. A composite film for a food heating automatic pressure regulating packaging device, at least comprising: a substrate film layer having a plurality of micro-crack structure regions generated by a roll pressing process; and according to the substrate film The width of the micro-crack structure area of the layer depends on the side of the sealing film layer that must be larger than its range. The side of the sealing film layer is evenly coated with an adhesive layer, and the adhesive layer on the side of the sealing film layer is correspondingly laminated on the substrate. The surface layer of the micro-crack structure area of the film layer; as a food in a packaging device at room temperature, refrigerated or frozen, it is a closed packaging. When the hermetically sealed cold and refrigerated food is microwave-heated, the food is heated to generate high temperature and pressure The vapor will pass through many micro-crack structure areas provided by the substrate film layer and act on the surface of the adjacent adhesive layer. The adhesive layer becomes soft and gradually loses the adhesion strength due to the action of the thermal vapor and then detaches from the substrate. The material film layer forms a ventilation channel, so that high-temperature and high-pressure steam can be adjusted by the ventilation channel to prevent the packaging device from exploding, while ensuring that High-temperature vapors do not cause significant loss and the food may dry out. 2. The "composite film for food heating automatic pressure-adjusting packaging device" as described in item 1 of the scope of the patent application, wherein the substrate film layer contains at least one material, which is optional acrylic or polyester Polyester, polyethylene (PE), polypropylene (PP), polyamine (ρο 1yamide), ethylene-styrene copolymer (ES), cyclic Page 30 200528268 6. Scope of patent application: Dilute copolymers (cyclo olefin), polyethylene terephthalate (PET), polyvinyl alcohol (PVA), ethylene-vinyl alcohol Polymer (ethylene vinyl alcohol (EV0H)), ethylene-vinyl acetate (EVA), ionic polymer compounds, polyethylene naphtha late (PEN), ^ ^ (p〇1y ether ether ketone (PEEK)), polycarbonate (PC), polysulfone, polyimide (PI), polyacrylonitrile (PAN), styrene acrylic cyanide Copolymer (styrene acrylonitrile, SAN), polyurethane (PU), nylon, butterfly paper, polymer multilayer co-extruded stretch film, synthetic paper, glassine paper, polymer materials Covered paper, paper and other materials or a group of the above materials combined. 3. The "composite film for food heating automatic pressure-adjusting packaging device" as described in item 1 of the scope of the patent application, wherein the sealing film layer is composed of at least one material, and is an optional free hydrocarbon polymer (ρ ο 1 y ο 1 efi η), Polyethylene (PE), Polypropylene (PP), Polyester film, Polyethylene t erephtha late (PET), Polystyrene , Polyvinyl chloride, polyethylene glycol p-naphthalate (ρ ο 1 yethy 1 enenaphtha 1 ate, pe EN), polyvinyl ketone (ρ ο 1 y ether ether ketone, PEEK), polycarbonate carbonate (polycarbonate , PC), polyimide (PI), polysulfone, polyacrylonitrile, Page 31, 200528268 6. Scope of patent application (PAN), acrylic, polyethylene polypropylene copolymer, ethylene-styrene copolymer (ES), cyclic olefin copolymer (cyclo olefin), polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), styrene acrylonitrile (SAN), polyurethane (PU), nylon (Nylon), polyamide, ethylene-styrene copolymer (ES), ionic polymer compound, synthetic paper, wax paper, polyethylene non-woven fabric, polypropylene non-woven fabric, inorganic plastic film Synthetic paper, multi-layer co-extruded stretch film, multi-layer composite film and other materials or a group of combinations of the above materials. 4 · The "composite film for food heating automatic pressure-pressure packaging device" as described in item 1 of the scope of the patent application, wherein the sealing film layer may be selected from the group consisting of plastic film lamination or steaming bell-metal layer composite film One ethnic group. 5. The "composite film for food heating automatic pressure regulating packaging device" as described in item 4 of the scope of patent application, wherein the metal layer is selected from aluminum or aluminum alloy. 6 · The "composite film for food heating automatic pressure-adjusting packaging device" as described in item 1 of the scope of patent application, wherein the material of the adhesive layer is selected from free acrylic polymers (polyacrylics), polyesters, olefins Polymer (polyolefin), polyethylene (PE), polypropylene (PP), cyclic olefin copolymer (cyclo olefin), polyvinyl alcohol (polyvinyl alcohol (PVA), ethylene-vinyl acetate, EVA ), Ethylene vinyl alcohol copolymer (ethylene vinyl Page 32 200528268 VI. Application scope of patent (alcohol, EV0H), polyolefin derivative adhesive (polyolefin derivative adhesive), polyamine (Polyamide, nylon), polyamine (PU), polyphenylene butyl butyl Two dilute copolymers, polyethylene polypropylene copolymer, ethylene styrene copolymer (ES), cyclic olefin copolymer (cyclo olefin), single-liquid primer, two-liquid primer ( primer), rubbers, hot melt elastomers, silicone elastomers, ionomers, thermoplastic 1 plastic rubber, palm wax, paraffin wax, microcrystalline Grain, peak fiber, and natural bran materials such as rice bran, natural polyethylene, polyethylene (PE) synthetic wax, oxidized polypropylene (PP) wax, polyethoxy resin (PE0) soil, and other petroleum products, mineral oil Products, man-made waxes or synthetic waxes such as polyolefins, wax oxide synthetic waxes, fatty acids and their derivatives, and starch and its content Starch derivatives, etc. One group of the above materials or combinations of materials. 7. The "composite film for food heating automatic house packaging device" as described in item 1 of the scope of the patent application, wherein the hermetically sealed frozen and refrigerated food packaging device can be made into a container or a bag (bag) 〇8 The "composite film for food heating automatic ink adjustment packaging device" as described in item 7 of the scope of the patent application, wherein the container or bag contains a container filled with an aqueous solution During the microwave heating process, the container is opened and the aqueous solution is released. 200528268 6. Scope of patent application 9. The "composite film for food heating automatic pressure-pressure packaging device" as described in item 1 of the scope of patent application, wherein the substrate film layer may be a whole or a part of the area with a plurality of micro-crack structure areas . 10. The "composite film for automatic heating and pressure-packaging device for food heating" as described in item 1 of the scope of the patent application, wherein the adhesive layer may be the entire or a part of the region to cover the substrate film layer with a plurality of micro-crack structure regions. 11. A method for manufacturing a composite film for a food heating automatic pressure regulating and packaging device, comprising: a substrate film layer using a plurality of micro-crack structure regions generated by a roll pressing process; a uniform coating of an adhesive layer The width of the micro-crack structure area determined from the base film layer must be larger than the range of the side of the sealing film layer; the above-mentioned sealing film layer is bonded to the base film layer by its adhesive layer and pressure. The utility model relates to a composite film which can be applied to a food heating automatic pressure regulating packaging device. 1 2. The "manufacturing method of a composite film for a food heating automatic pressure regulating packaging device" as described in item 9 of the scope of the patent application, wherein the adhesive layer is coated on one side surface of the sealing film layer, which can be Adhesive material solution is applied for drying or direct hot melt coating. Page 34