Environment-friendly high-barrier paper-based blister packaging sheet and preparation method thereof

Abstract

The present application relates to the technical field of packaging materials, and particularly relates to an environment-friendly high-barrier paper-based blister packaging sheet and a preparation method thereof, which comprises determining the coefficient of the cold stamping target parameter according to the blister type and the blister area change, determining the judgment standard of the subsequent consumption elongation rate and the spraying amount of the upper film heat-seal glue area; confirming the influence of the correction tension change on the lower film cold stamping and the upper and lower film heat sealing based on the predicted cumulative length difference, or correcting the corresponding unwinding speed without breaking through the corresponding film roll strength error allowable range; calculating the consumption elongation rate according to the actual thickness of the lower film and the actual tension change, adjusting the cold stamping target parameter according to the prediction of the decline degree of the plastic deformation ability of the lower film within the normal range, or adjusting the cumulative length difference to break through the judgment standard of the corresponding error allowable range when the decline degree exceeds the normal range. The present application replaces the aluminum-plastic blister packaging with a single paper-based material to reduce the consumption of non-renewable resources by the packaging bag material.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of packaging materials, in particular to an environmentally friendly high-barrier paper-based blister packaging sheet and a preparation method thereof. BACKGROUND

[0002] Blister packaging is a widely used unit-dose packaging form in the fields of pharmaceuticals, food, cosmetics, etc., which has the advantages of strong protection, convenient use, and easy carrying. Its core structure is usually composed of an upper film (cover layer) and a lower film (blister substrate), which are heat-sealed to form a sealed cavity to protect the contents from the external environment (such as moisture, oxygen, light, etc.).

[0003] Chinese Patent Publication No. CN106696427A discloses a preparation method of a composite hard sheet for tropical blister packaging; specifically, a mixture of titanium dioxide, ytterbium fluoride, and zirconium oxide is ball milled and calcined to obtain a filler; the filler is mixed with di-n-hexylamine, and then N-formylmorpholine, diethyl phosphite, and benzimidazole are added and mixed; diisoprene diepoxide, polyamide wax, and ethoxylated trimethylolpropane triacrylate are sequentially added to the mixture, stirred at 170°C for 5 minutes to obtain a composite; the composite is added to an extruder; then a polyester film with a surface treated by corona is passed through the extruder to prepare a composite polyester film; the composite polyester film is hot-pressed with an aluminum foil to obtain an aluminum-plastic material; and the aluminum-plastic material is passed through an extruder to prepare the composite hard sheet for tropical blister packaging. It can be seen that the preparation method of the composite hard sheet for tropical blister packaging has the following problems:

[0004] Fixed parameters are difficult to adapt to material fluctuations and production demand standards, and aluminum-plastic blister packaging is not convenient to recycle and is not environmentally friendly. SUMMARY

[0005] Therefore, the present application provides an environmentally friendly high-barrier paper-based blister packaging sheet and a preparation method thereof to overcome the problems of fixed parameters being difficult to adapt to material fluctuations and production demand standards and aluminum-plastic blister packaging being not convenient to recycle and not environmentally friendly in the prior art.

[0006] To achieve the above-mentioned purpose, the present application provides a preparation method of an environmentally friendly high-barrier paper-based blister packaging sheet, comprising:

[0007] The upper film and the lower film of the paper-based blister packaging sheet are wound into an upper film roll and a lower film roll, and the cold stamping target parameters of the lower film cold stamping into bubbles are determined according to the differences in the layered structure of the lower film and the changes in the blister depth requirements;

[0008] The determination coefficient of the cold stamping target parameters is adjusted according to the changes in the blister type and the blister area, and the determination standard of the subsequent consumption elongation and the spraying amount of the upper film heat-seal adhesive area are determined.

[0009] The matching degree of the unwinding speed and the traction speed is determined according to a rotational speed matching value of the unwinding roller and the traction roller, and it is determined whether to adjust the unwinding rotational speed and to predict the accumulated length difference within the unwinding time length;

[0010] The influence of the correction tension change on the lower film cold stamping and the upper and lower film heat sealing is confirmed based on the predicted accumulated length difference breaking through the corresponding film roll strength error allowable range, or the corresponding unwinding rotational speed is corrected when the accumulated length difference does not break through the corresponding film roll strength error allowable range;

[0011] The consumption elongation is calculated according to the actual thickness and the actual tension change of the lower film, and the determination criterion of the matching degree is adjusted when the decline degree of the plastic deformation capacity of the lower film does not exceed the normal range, or the accumulated length difference breaking through the corresponding error allowable range is recalled when the decline degree exceeds the normal range;

[0012] The coverage deviation value is calculated by obtaining the conveying length of the upper film and the lower film after the cold stamping and the heat seal adhesive coating, and the alignment deviation degree of the blister edge sealing area and the heat seal adhesive area is determined;

[0013] The determination criterion of the matching degree is adjusted according to the deviation trend of the heat seal adhesive area and the blister edge sealing area, or the defect point is marked to adjust the cutting timing and the unwinding speed of the upper film roll.

[0014] Further, the lower film layer structure difference includes actual thickness parameter difference and material yield strength difference, and the cold stamping target parameter is target stamping force and target stamping speed.

[0015] Further, the process of adjusting according to the blister type and the blister area change includes:

[0016] When the blister type changes, the target stamping force is reduced by reducing the safety factor, and the target stamping speed is reduced by reducing the reference speed;

[0017] When the area of a single blister changes, the critical elongation is reduced / increased according to the large / small amplitude of the blister area, and the spraying amount of the annular adhesive layer is increased / decreased according to the large / small amplitude of the blister area.

[0018] Further, the process of determining the matching degree of the unwinding speed and the traction speed includes:

[0019] When the rotational speed matching value is less than or equal to the critical matching value, it is determined that the unwinding speed and the traction speed are in the first matching degree, and it is predicted whether the accumulated length difference will break through the error allowable range corresponding to the current lower film strength and the current upper film strength before the lower film roll and the upper film roll are unwound under the current rotational speed difference matching degree;

[0020] When the rotation speed matching value is greater than the critical matching value, it is judged that the unwinding speed and the traction speed are in a second matching degree, and the unwinding rotation speed of the unwinding roller is adjusted according to the speed difference between the unwinding speed and the traction speed.

[0021] Further, the cumulative length difference is calculated.

[0022] When the cumulative length difference is greater than or equal to a first standard value, it is predicted that the length accumulation will cause the tension change to exceed the safety range of the current lower film strength or the current upper film strength, and the unwinding rotation speed of the corresponding unwinding roller is corrected.

[0023] When the cumulative length difference is less than the first standard value and greater than a second standard value, it is confirmed that the correction of the tension change has an impact on the upper film cold stamping and the upper and lower film heat sealing.

[0024] Further, the process of confirming the impact of the correction of the tension change on the upper film cold stamping and the upper and lower film heat sealing includes:

[0025] The actual tension of the lower film is detected, and the consumed elongation is calculated according to the material parameters of the lower film. When the consumed elongation is less than or equal to a critical elongation, it is predicted that the decrease of the plastic deformation ability of the lower film under the current actual tension does not exceed the normal range.

[0026] When the consumed elongation is greater than the critical elongation, it is predicted that the decrease of the plastic deformation ability of the lower film under the current actual tension exceeds the normal range, and the stamping according to the determined target stamping force and target stamping speed will cause the blister to not meet the requirements.

[0027] Further, when the decrease does not exceed the normal range, the target stamping force is increased according to the ratio of the total elongation of the material to the consumed elongation, and the target stamping speed is decreased according to the change of the target stamping force.

[0028] Further, when the decrease exceeds the normal range, the unwinding rotation speed of the unwinding roller is corrected according to the ratio of the consumed elongation to the total elongation of the material and the first standard value is reduced.

[0029] Further, the process of confirming the impact of the correction of the tension change on the upper film cold stamping and the upper and lower film heat sealing includes:

[0030] The encoder provided by the traction roller detects the conveying length of the upper film and the lower film after cold stamping and heat sealing glue coating in real time, respectively, and calculates the coverage deviation value of the upper film conveying length and the lower film conveying length.

[0031] When the coverage deviation value is less than or equal to a deviation evaluation value, it is judged that the alignment deviation of the upper and lower films is in a normal range, and the deviation trend of the heat sealing glue area and the blister edge sealing area is determined.

[0032] When the coverage deviation value is greater than the deviation evaluation value, it is judged that there is an alignment deviation between the upper and lower films, and a defect point is marked.

[0033] Further, when there is an alignment deviation between the upper film and the lower film, according to the ratio of the covering deviation value to the fixed time length, the unwinding speed of the upper film roll is reduced or increased when the upper film conveying length is greater or less than the lower film conveying length;

[0034] After marking the defect site, the subsequent slitting device stops slitting for a fixed time when the single slitting timing is bypassed, and the blister packaging sheet with alignment deviation is automatically rejected.

[0035] Further, the production process of the upper film and the lower film is to coat the coating liquid to both sides of the paper base layer by roller coating or dip coating, plate layers on both sides of the coated paper base layer respectively, and determine whether to print varnish on the outside of the upper film according to the requirement, and roll to prepare the upper film roll or the lower film roll;

[0036] After the upper film is cold stamped according to the cold stamping target parameters and the lower film is coated with a heat seal adhesive layer, it is combined into a blister packaging sheet by hot pressing.

[0037] Further, the control parameters of the primer coating include the coating material moving speed and the drying temperature;

[0038] The moving speed is less than or equal to 200 m / min, the drying temperature is divided into three steps of drying temperature, one group of 50-80℃, two groups of 70-100℃, and three groups of 90-120℃, and the coating amount of the primer coating is 3-10 g / m 2 / one side.

[0039] Further, the plated layer of the upper and lower films is vacuum plated with aluminum oxide, and when printing on the upper film or the lower film, the printing speed is ≤350 m / min, and the drying temperature after printing is 40-80℃.

[0040] Further, the control parameters of the glue coating are consistent with those of the primer coating, and the coating amount of the heat seal adhesive during glue coating is 5-10 g / m 2 .

[0041] An environmentally friendly high-barrier paper-based blister packaging sheet, comprising:

[0042] An upper film, which is a sealing easy-to-open material, the structure of the sealing easy-to-open material comprises, from top to bottom, a varnish layer, an ink layer, a primer layer, a paper base layer, a primer layer, a plated layer, and a heat seal adhesive region;

[0043] A lower film, which is a bubble material, the structure of the bubble material comprises, from top to bottom, a varnish layer, an ink layer, a primer layer, a paper base layer, a primer layer, and a plated layer.

[0044] Further, the weight parameter range of the upper film is 30-100 g / m 2 , and the weight parameter range of the lower film is 60-400 g / m2 ;

[0045] The barrier property of the prepared blister packaging sheet requires that the water vapor transmission is less than or equal to 2 g / (m 2 ·24h), and the oxygen transmission is less than or equal to 2 cm 3 / (m 2 ·24h·0.1MPa).

[0046] Further, the polyvinyl alcohol coating is used as a primer coating, the coating amount of the primer coating is 3-10 g / m2 per layer; the plating layer is aluminum oxide, and the coating amount of the hot sealing glue is 5-10 g / m 2 .

[0047] Compared with the prior art, the beneficial effects of the present application are that, in the heat sealing process of the paper-based blister packaging, the layer structure difference (such as thickness, thermal conductivity and glue layer distribution) of the upper film (easy-to-peel layer) and the lower film (blister layer) directly affects the sealing quality. The traditional process relies on fixed parameters (temperature, pressure, time), and it is difficult to adapt to material fluctuations or production demand standards. The present application uses dynamic adjustment logic to optimize the heat sealing parameters by real-time monitoring of the physical state of the upper and lower films, and to ensure the sealing property, easy-to-peel property and production efficiency.

[0048] Further, in the blister packaging production process, the change of the film roll diameter directly affects the unwinding tension. As the film roll is continuously unwound, its diameter gradually decreases, and if the tension control is improper, it will cause the film to stretch and deform, the edge to wrinkle or the film to relax and deviate, the alignment accuracy to decrease, and the heat sealing to be misaligned. The present method adjusts the rotational speed to maintain the linear speed of the upper film roll and the lower film roll to ensure the stable conveying of the upper film and the lower film.

[0049] Further, the main difference between the capsule type and the tablet type blister is the shape, the depth / height (H), the length-diameter ratio (L / D) and the profile. Under the same conditions, the larger the blister type and the blister area, the better the plastic deformation ability of the material is required, and the higher the elongation requirement is, and the greater the risk of rupture is. Under the same blister type, the change of the blister size and the blister spacing will change the corresponding cold stamping die, but at the same time, the blister area ratio in unit area will change, which will also change the influence of cold stamping on the paper-based lower film and the chain reaction of the subsequent process. The present method adjusts the cold stamping parameters of the lower film and the hot sealing glue coating parameters of the upper film according to the change of the blister, correspondingly changes the judgment standard of the subsequent elongation consumption, and ensures that the cold stamping process is still stable after the change of the blister type or the blister size, and produces high-quality and high-barrier packaging products.

[0050] Further, as the film roll diameter decreases, the control of the unwinding roller speed ω increases, but if the initial speed is not matched, the length difference L will continue to accumulate, causing the film to be loose or too tight, and the length of the film between the unwinding roller and the traction roller will continue to increase, causing the film to be subjected to greater and greater tension; the method first determines whether to adjust the unwinding speed of the unwinding roller by the matching degree of the unwinding speed and the traction speed of the speed matching value, and determines whether to adjust the unwinding speed of the corresponding unwinding roller according to whether the predicted accumulated length difference will exceed the corresponding error allowable range, and adjusts the unwinding speed of the corresponding unwinding roller in the case where the accumulated length difference will exceed the corresponding error allowable range, respectively ensures the matching accuracy of the line speed of the upper film roll and the lower film roll in the blister production, and avoids material failure or process failure caused by length accumulation error.

[0051] Further, the thickness variation of the paper base of the lower film affects the variation of the elastic modulus, the greater the thickness, the higher the stamping force required but the lower the elongation, and the greater the thickness, the higher the degree of decline in plastic deformation ability under the same tension influence, and the lower the tension tolerance; the present application divides the length change of the lower film into an elastic deformation part (linear term of the formula) and a plastic deformation part (nonlinear term of the formula), based on the principle that elastic deformation is recoverable and plastic deformation is not recoverable, calculates the remaining elongation to quantify the severity of the decline in plastic deformation ability according to the actual tension of the lower film, and when the decline is not serious, reduces the dynamic stress impact by reducing the initial stamping speed, and when it is serious (the tension is close to the tension threshold corresponding to the yield strength), the safety range of the current lower film strength is reflected to be in error, and the lower film cannot be safely protected when the film roll and the traction roller have length accumulation, the safety range is corrected by changing the judgment standard, and the accuracy and adaptability of judging and optimizing the lower film conveying condition before cold stamping are increased.

[0052] Further, since both the upper film and the lower film may have length accumulation, the difference in length accumulation is likely to cause deviation in heat sealing, and it is known that the upper and lower film of the paper-based blister sheet has recoverable elastic deformation, if the influence of length accumulation on deviation is detected before cold stamping and heat-seal adhesive coating, there will be an error caused by elastic deformation, resulting in misjudgment, the method detects the conveying length of the upper film and the lower film after cold stamping and heat-seal adhesive coating, respectively, improves the accuracy of deviation detection, and according to the conveying length of the upper and lower film, whether the tension change and length accumulation will cause deviation is determined, the deviation level and deviation trend of the deviation condition are combined to determine whether to mark the defect point, and the unwinding speed of the upper film roll is adjusted according to the deviation trend and the unwinding speed of the upper film roll, so as to reduce the difference in length accumulation between the upper and lower films, by discussing the influence of the upper and lower films having length accumulation, whether it will cause the blister edge sealing area of the lower film and the heat-seal adhesive area of the upper film to have out-of-range deviation, thereby increasing the adaptability to different deviation conditions and the flexibility of heat sealing of the upper and lower films of the packaging sheet.

[0053] Further, the medicine / food blister package in the market is mainly aluminum-plastic blister package. It is inconvenient to recycle and not environment-friendly. The product of the present application is a recyclable and environment-friendly high-barrier paper-based blister package material. The prepared blister package sheet is a single paper-based material, has high barrier property, heat sealability, and can be degraded, recycled and recycled, and can replace the recyclable and environment-friendly package of the aluminum-plastic blister package. It helps to reduce the consumption of non-renewable resources of the packaging bag material, and the bottom coating layer increases the combination of the paper layers, and the environmental pollution is small. Compared with the traditional aluminum-plastic blister package, the blister package sheet of the present application is a paper-based composite layered structure. In order to avoid tearing the paper-based layer of the lower film during cold stamping of the lower film, the composite paper-based layer of the lower film is distributed in a staggered manner during cold stamping. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 The preparation method flow chart of the environment-friendly high-barrier paper-based blister package sheet in the embodiment of the present application is shown in the figure.

[0055] Figure 2 The preparation and winding schematic diagram of the upper film of the paper-based blister package sheet in the embodiment of the present application is shown in the figure.

[0056] Figure 3 The preparation and winding schematic diagram of the lower film of the paper-based blister package sheet in the embodiment of the present application is shown in the figure.

[0057] Figure 4 The flowchart schematic diagram of the initial stage of heat sealing of the paper-based blister package sheet in the embodiment of the present application is shown in the figure.

[0058] Figure 5 The flowchart schematic diagram of the end stage of heat sealing of the paper-based blister package sheet in the embodiment of the present application is shown in the figure.

[0059] Figure 6 The front view structure schematic diagram of the upper film and the lower film in the embodiment of the present application is shown in the figure.

[0060] Figure 7 The front view structure schematic diagram of another type of lower film of the blister in the embodiment of the present application is shown in the figure.

[0061] Figure 8 The layered structure schematic diagram of the composite paper-based layer in the embodiment of the present application is shown in the figure.

[0062] In the figure: 1-upper film, 2-lower film, 3-medicine, 4-upper film roll, 5-lower film roll, 6-feed roller, 7-drawing roller, 8-heat sealing plate, 9-heat sealing mold, 10-blister, 11-slitting device, 12-receiving device, 13-drying device, 14-coating liquid, 15-liquid tank, 16-knife, 17-roller, 18-plate, 101-photographic oil layer, 102-ink layer, 103-bottom coating layer, 104-paper-based layer, 105-plating layer. DETAILED DESCRIPTION

[0063] In order to make the objects, technical schemes and advantages of the present application clearer, the following further describes the present application with reference to the embodiments; it should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0064] The preferred embodiments of the present application are described below with reference to the drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application.

[0065] It should be noted that, in the description of the present application, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating the direction or positional relationship of the terms are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0066] In addition, it should also be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0067] Please refer to Figures 1-8 shown, Figure 1 for the preparation method flow chart of the environmentally friendly high-barrier paper-based blister packaging sheet in the embodiment of the present application; Figure 2 for the preparation and winding schematic diagram of the upper film of the paper-based blister packaging sheet in the embodiment of the present application; Figure 3 for the preparation and winding schematic diagram of the lower film of the paper-based blister packaging sheet in the embodiment of the present application; Figure 4 for the flow schematic diagram of the initial stage of hot-pressing sealing of the paper-based blister packaging sheet in the embodiment of the present application; Figure 5 for the flow schematic diagram of the end stage of hot-pressing sealing of the paper-based blister packaging sheet in the embodiment of the present application; Figure 6 for the front view structural schematic diagram of the upper film and the lower film in the embodiment of the present application; Figure 7 for the front view structural schematic diagram of another type of lower film in the embodiment of the present application; Figure 8 for the layered structural schematic diagram of the composite paper-based layer in the embodiment of the present application.

[0068] To achieve the above object, the present application provides a preparation method of an environmentally friendly high-barrier paper-based blister packaging sheet, characterized in that it comprises:

[0069] Step S1, the upper film and the lower film of the paper-based blister packaging sheet are wound into an upper film roll and a lower film roll, and the cold stamping target parameters of the lower film cold stamping into bubbles are determined according to the difference of the lower film layered structure and the change of the blister depth requirement;

[0070] Step S2, the determination coefficient of the cold stamping target parameters is adjusted according to the change of the blister type and the blister area, and the determination standard of the subsequent consumption elongation and the spraying amount of the upper film hot sealing glue area are determined;

[0071] Step S3, the current roll diameter of the upper film roll and the lower film roll is calculated in real time, the torque of the unwinding motor is dynamically adjusted according to the current roll diameter, and the unwinding speed of the unwinding roller is adjusted by the torque control to maintain the linear speed of the upper film roll and the lower film roll;

[0072] Step S4, the unwinding speed of the unwinding roller and the traction speed of the traction roller are obtained to calculate the matching value of the rotating speed, the matching degree of the unwinding speed and the traction speed is determined, and whether the unwinding speed of the unwinding roller is adjusted is determined according to the matching degree;

[0073] Step S5, it is predicted whether the cumulative length difference generated under the current matching degree will break through the error allowable range under the corresponding current lower film strength and current upper film strength within the unwinding time length, the unwinding speed of the corresponding unwinding roller is corrected, or the influence of the correction tension change on the upper film cold stamping and the upper and lower film hot sealing is confirmed;

[0074] Step S6, the consumption elongation is calculated according to the actual thickness of the lower film and the actual tension change borne by the lower film, it is predicted whether the decline degree of the plastic deformation ability of the lower film exceeds the normal range, the cold stamping target parameters are adjusted, or the determination standard of the cumulative length difference breaking through the corresponding error allowable range is adjusted;

[0075] Step S7, the conveying length of the upper film and the lower film after cold stamping and hot glue coating is obtained to calculate the coverage deviation value, and the alignment deviation degree of the blister edge sealing area and the hot glue area is determined;

[0076] Step S8, the determination standard of the matching degree is adjusted according to the deviation trend of the hot glue area and the blister edge sealing area, or the defect point is marked to adjust the cutting timing and the unwinding speed of the upper film roll;

[0077] Wherein, the difference of the lower film layered structure includes the difference of the actual thickness parameter and the difference of the material yield strength, and the cold stamping target parameters are target stamping force and target stamping speed.

[0078] Specifically, in the heat sealing process of the paper-based blister packaging, the difference in the layered structure (such as thickness, thermal conductivity and glue layer distribution) of the upper film (easy-to-peel layer) and the lower film (blister layer) directly affects the sealing quality. The traditional process relies on fixed parameters (temperature, pressure, time), which is difficult to adapt to material fluctuations or production demand standards. The present application adopts dynamic adjustment logic, optimizes the heat sealing parameters by real-time monitoring of the physical state of the upper and lower films, and ensures the sealing property, easy-to-peel property and production efficiency.

[0079] The production process of the upper film is to coat the coating liquid to both sides of the paper base layer by roller coating, plate layers on both sides of the coated paper base layer respectively, and print gloss on the outer side of the upper film, and wind to prepare an upper film roll;

[0080] The production process of the lower film is to coat the coating liquid to both sides of the paper base layer by immersion coating, plate layers on both sides of the coated paper base layer respectively, and determine whether to print gloss on the outer side of the lower film according to the requirements (generally no printing or only printing LOGO logo), and wind to prepare a lower film roll;

[0081] The upper film and the lower film are combined into a blister packaging sheet through heat sealing, and the preparation process of the blister packaging sheet includes:

[0082] Blister forming: the lower film (blister material) is first formed into a concave blister cavity in the mold for containing the medicine by cold stamping process;

[0083] Product filling: the formed lower film enters the automatic filling line to accurately place the products such as tablets, capsules into the blister cavity;

[0084] Upper film alignment: the upper film (easy-to-peel layer) is aligned with the lower film through the tension control system to ensure that the heat sealing area completely covers the blister opening;

[0085] Heat sealing (heat sealing): the heat sealing glue layer of the upper film and the sealing area of the blister edge of the lower film are preheated to the softening temperature by the hot plate and then pressed and bonded, the temperature of the upper and lower films is provided by the hot plate and the hot die, and the upper and lower films are bonded under pressure;

[0086] Cooling and cutting: immediately solidify the heat sealing glue by cooling roller or air cooling system, lock the sealing strength, and then cut the continuous blister packaging sheet into several blister packaging sheets according to the preset cutting time sequence by the cutting device.

[0087] Process parameter description:

[0088] In this embodiment, the control parameters of the primer coating are the moving speed of the coating material and the drying temperature, and in the implementation, the moving speed is ≤200 m / min, and the drying temperature is divided into three steps of drying temperature, one group of 50-80℃, two groups of 70-100℃, and three groups of 90-120℃;

[0089] The coating amount of the primer coating is 3-10 g / m2 / Single-sided, the plating layer of the upper and lower film is vacuum plated with aluminum oxide. When printing on the upper film or the lower film, the printing speed is ≤350 m / min, and the drying temperature after printing is 40-80℃;

[0090] The control parameters of the gluing are consistent with the primer. The coating amount of the heat-seal adhesive during gluing is 5-10 g / m 2 .

[0091] In the implementation, when the prepared upper film and lower film of the blister packaging sheet are slitting, the films are spliced to increase the production efficiency according to the maximum width range of the printing machine, the coating machine, the slitting machine and other equipment, and then the large roll is cut into small rolls according to the needs;

[0092] For example, the final customer uses a film roll with a width of 200 mm*500 m / roll. During production, the films are spliced into 200 mm*4+20 mm of edge material=820 mm, and a large roll with a length of 2000 m is produced. After completion, the large roll is cut into 200 mm*500 m / roll according to the customer's needs, and a total of 16 small rolls are obtained.

[0093] In the embodiment, since the lower film needs to be punched into a concave shape to accommodate the tablets, the lower film needs to have higher strength (punching resistance). The upper film is coated by roller coating, and the lower film is coated by dip coating, which is suitable for thick porous structure paper materials. The paper bases of the upper and lower films are different, and due to the demand for punching resistance of the lower film, the thickness of the lower film changes when producing blister packaging products with different sizes.

[0094] According to the differences in the layered structure of the lower film, that is, the differences in the film layer thickness parameters and the material yield strength, and combined with the changes in the demand for the blister depth according to the size of the medicine, the cold punching target parameters of the cold punching into the blister are determined;

[0095] After the demand for the blister depth changes, the corresponding blister mold needs to be replaced. Due to the change in the demand for the blister depth, the required pressure resistance of the lower film also changes, and the thickness of the paper base in the layered structure of the selected lower film is different;

[0096] The actual thickness of the prepared lower film is detected, and the material yield strength of the lower film is measured experimentally. The historical thickness of the lower film is obtained, the target punching force and the target punching speed are calculated, and the punching force and the punching speed are adjusted through the servo punching machine;

[0097] The target punching force = safety factor × actual thickness × material yield strength × punching projection area, wherein the safety factor is 1.2-1.5, which is positively correlated with the actual thickness, the material yield strength is 50 MPa, and the punching projection area = πr 2 , r is the radius of the punching head;

[0098] The target punching speed = reference speed × (reference thickness ÷ actual thickness) 0.5X (reference depth ÷ demand blister depth), wherein the reference speed is 60 times per minute, the reference thickness is 200 pm, and the reference depth is 6 mm;

[0099] Specifically, the cold stamping process is performed by a blister mold and a plurality of stamping heads corresponding to the blister mold to stamp a plurality of blisters on the lower film.

[0100] After the lower film is cold-stamped, before the upper and lower films are heat-sealed, the products such as tablets and capsules are precisely placed in the cavities of the plurality of blisters through a filling process.

[0101] The following table shows the comparison of the cold stamping parameters after the demand blister depth and the actual thickness change.

[0102]

[0103] Table 1 Comparison of cold stamping parameters

[0104] In this embodiment, the blister types include capsule type and tablet type, and when the blister type is changed from tablet type to capsule type, the stamping force and the stamping speed for cold stamping the lower film need to be adjusted.

[0105] When the blister type changes, the target stamping force is reduced by reducing the safety factor, and the target stamping speed is reduced by reducing the reference speed.

[0106] The cross-sectional size of the medicine determines the blister area, and when the size of the medicine changes in the horizontal direction, the blister area changes accordingly. At the same time, the blister spacing is positively correlated with the blister area, and the number of blisters in the blister packaging product changes accordingly, and the blister area ratio in the unit area of the lower film changes synchronously.

[0107] The requirement for elongation is higher, the paper base is heavier, the blister sealing area changes, and the size of the area that needs to be heat-sealed changes.

[0108] When the total area of the packaging tablets does not change, the single blister area changes, and the blister spacing is positively correlated with the range of influence of the stamping, so the amplitude of the negative correlation change of the number of blisters is usually greater than the amplitude of the change of the blister area (i.e., the blister area ratio of the lower film becomes smaller when the blister area becomes larger, and vice versa).

[0109] When the single blister area changes, the determination criterion of the elongation consumption and the spraying amount of the upper film heat-sealing glue area are adjusted.

[0110] Specifically, the critical elongation is reduced or increased according to the amplitude of the change of the blister area, and the spraying amount of the annular glue layer is increased or reduced according to the amplitude of the change of the blister area.

[0111] Specifically, the main differences between the capsule type and the tablet type blister are the shape, the depth / height (H), the length-diameter ratio (L / D) and the profile. Under the same conditions, the larger the blister type and the blister area, the better the plastic deformation ability of the material is required, and the higher the elongation requirement is, which faces a greater risk of rupture. Under the same blister type, the size of the blister and the interval between the blisters will change the corresponding cold stamping die, but at the same time, the blister area ratio in the unit area will change, which will also change the influence of cold stamping of the paper-based lower film and the subsequent process chain reaction. The method adjusts the cold stamping parameters of the lower film and the hot sealing glue coating parameters of the upper film according to the change of the blister, and correspondingly changes the judgment standard of the subsequent elongation consumption, so as to ensure that the cold stamping process is still stable after changing the blister type or the blister size, and to produce high-quality and high-barrier packaging products.

[0112] With the unwinding of the upper film and the lower film, the radius of the upper film roll and the lower film roll decreases continuously, and the tension caused by the unwound upper film and lower film increases, and the tension received by the upper film and the lower film increases;

[0113] Specifically, the rotation speed of the upper film and the lower film unwinding roller does not change, the angular velocity does not change, and the linear velocity becomes smaller and smaller. The rotation speed is adjusted in real time through torque control to keep the linear velocity unchanged.

[0114] In the implementation, the initial roll diameter of the upper film and the lower film, the target tension range and the actual film thickness are obtained respectively. The number of unwinding turns is recorded by an encoder, and the actual linear velocity and the actual angular velocity of the film roll are measured. The current roll diameter = 2 x actual linear velocity / actual angular velocity is calculated.

[0115] Specifically, the dynamic torque = target tension range median x current roll diameter / 2 is calculated, and the output of the film roll unwinding servo motor is adjusted according to the dynamic torque.

[0116] Embodiment of dynamic adjustment process with constant tension:

[0117] The initial state roll diameter = 300mm, the median value of the set tension range is 100N / m, and the corresponding initial torque = 100 x 0.3 ÷ 2 = 15N·m;

[0118] When the roll diameter is reduced to 150mm, the new torque = 100 x 0.15 ÷ 2 = 7.5N·m, and the unwinding servo motor reduces the torque from 15N·m to 7.5N·m, maintaining the tension at about 100N / m;

[0119] If the torque is not adjusted, the tension will rise to 200N / m, causing the film of the upper film or the lower film to be over-stretched;

[0120] In the dynamic adjustment process with constant tension, the unwinding speed of the film roll will automatically change following the motor torque-speed characteristic curve, and the motor speed will automatically increase when the torque decreases, driving the unwinding speed of the film roll to increase.

[0121] Specifically, in the production process of the blister packaging, the change of the diameter of the film roll will directly affect the unwinding tension. As the film roll is continuously unwound, its diameter gradually decreases. If the tension control is improper, it will cause the film to stretch and deform, the edge to wrinkle, or the film to relax and deviate, and the alignment accuracy to decrease. The method adjusts the speed by torque control to maintain the linear speed of the upper film roll and the lower film roll, ensuring the stable conveying of the upper film and the lower film.

[0122] In the embodiment, the film roll is an upper film roll and a lower film roll.

[0123] The unwinding speed of the unwinding roller and the traction speed of the traction roller are acquired or calculated in real time, and it is judged whether the speed mismatch is poor;

[0124] The unwinding speed = π × current roll diameter × unwinding speed, and the traction speed = π × traction roller diameter × traction speed;

[0125] The speed matching value is calculated according to the unwinding speed and the traction speed, and the speed matching value = | unwinding speed - traction speed | ÷ traction speed;

[0126] When the speed matching value is less than or equal to the critical matching value, it is judged that the unwinding speed and the traction speed are at the first matching degree, and the speed matching is good;

[0127] When the speed matching value is greater than the critical matching value, it is judged that the unwinding speed and the traction speed are at the second matching degree, and the speed matching is poor;

[0128] In the implementation, when the speed matching is poor, the unwinding speed of the unwinding roller is adjusted according to the speed difference between the unwinding speed and the traction speed, and the unwinding speed is decreased or increased when the unwinding speed is greater than or less than the traction speed.

[0129] When the speed matching is good, it is predicted whether the cumulative length difference will break through the error allowable range corresponding to the current lower film strength and the current upper film strength before the lower film roll and the upper film roll are exhausted at the current speed difference matching degree;

[0130] In the implementation, the material strength of the paper base material corresponding to the actual film thickness of the lower film and the upper film is found according to the corresponding relationship between the actual film thickness and the paper base material strength, and the allowable length error range is determined according to the material strength;

[0131] The cumulative length difference = | unwinding speed - traction speed | × unwinding remaining time × traction speed;

[0132] When the accumulated length difference is greater than or equal to the first standard value, the length accumulation prediction causes the tension change to exceed the safety range of the current lower film strength or the current upper film strength, and the unwinding speed of the corresponding unwinding roller is corrected;

[0133] In the implementation, the unwinding speed is controlled by speed + torque compound control, and the unwinding speed is increased in real time according to the ratio of the accumulated length difference to the second standard value.

[0134] When the accumulated length difference is less than or equal to the second standard value, the length accumulation prediction causes the tension change to exceed the safety range of the current lower film strength or the current upper film strength;

[0135] When the accumulated length difference is less than the first standard value and greater than the second standard value, the influence of the tension change on the cold stamping of the upper film and the heat sealing of the upper and lower films is analyzed and corrected.

[0136] The critical matching value is 1%, the first standard value is 0.05m, and the second standard value is 0.01m.

[0137] Specifically, the remaining unwinding time = remaining film roll length / pulling speed, and the remaining film roll length = π × (film roll diameter 2 - roll diameter at the end of unwinding 2 ) ÷ 4 × actual thickness.

[0138] Specifically, as the film roll diameter decreases, the control unwinding speed ω increases, but if the initial speed matching is poor, the length difference L will continue to accumulate, causing the film to be too loose or too tight, and the lower film length between the unwinding roller and the pulling roller will continue to increase, causing the tension on the lower film to increase. The film. This method first determines whether to adjust the unwinding speed of the unwinding roller by determining the matching degree of the unwinding speed and the pulling speed through the speed matching value, and then determines whether the accumulated length difference will break through the corresponding error allowable range, and corrects the unwinding speed of the corresponding unwinding roller when it is confirmed that the accumulated length difference will break through the corresponding error allowable range. The matching accuracy of the line speed of the upper film roll and the lower film roll in bubble production is ensured, and material failure or process failure caused by length accumulation error is avoided.

[0139] In this embodiment, the lower film needs to be cold stamped before heat sealing, and the upper film needs to be sprayed with several annular glue layers before heat sealing.

[0140] The process of analyzing and correcting the influence of the tension change on the cold stamping of the upper film and the heat sealing of the upper and lower films includes:

[0141] Detecting the actual tension of the lower film, and predicting the degree of decrease in the subsequent plastic deformation capacity of the actual tension of the lower film in combination with the thickness change of the paper base;

[0142] Calculating the consumption elongation, which is , wherein T is the actual tension, E is the elastic modulus, A is the cross-sectional area of the lower film, t is the actual thickness, a and n are the material hardening coefficient and index, Ty is the tension threshold corresponding to the yield strength, and Tu is the tension corresponding to the ultimate tensile strength;

[0143] In the implementation, the prepared lower film is experimentally fitted, a=0.5, n=1.5, and Ty and Tu are experimentally calibrated values;

[0144] When the consumed elongation is less than or equal to the critical elongation, the predicted degree of reduction of the plastic deformation capacity of the lower film under the current actual tension does not exceed the normal range;

[0145] When the consumed elongation is greater than the critical elongation, the predicted degree of reduction of the plastic deformation capacity of the lower film under the current actual tension exceeds the normal range, and stamping according to the determined target stamping force and target stamping speed will result in a blister that does not meet the requirements;

[0146] When the degree of reduction does not exceed the normal range, the target stamping force is increased according to the ratio of the total elongation of the material to (1-consumed elongation), and the target stamping speed is reduced according to the change in the target stamping force;

[0147] When the degree of reduction exceeds the normal range, the determination criterion for the change in tension that exceeds the safety range of the upper and lower films is adjusted, and the unwinding speed of the unwinding roller is corrected;

[0148] Specifically, the first standard value is reduced according to the ratio of the consumed elongation to the total elongation of the material.

[0149] The critical elongation is 4% of the total elongation of the material, and the elastic modulus, the cross-sectional area of the lower film, and the total elongation of the material are experimentally detected values after the preparation of the lower film is completed.

[0150] Specifically, the thickness change of the paper base of the lower film affects the change in the elastic modulus, and the greater the thickness, the higher the stamping force required but the lower the elongation. At the same time, the greater the thickness, the higher the degree of reduction of the plastic deformation capacity under the influence of the same tension, and the lower the tension tolerance. The length change of the lower film is divided into an elastic deformation part (linear term of the formula) and a plastic deformation part (nonlinear term of the formula) in the present application. Based on the principle that elastic deformation is recoverable and plastic deformation is non-recoverable, the severity of the reduction of the plastic deformation capacity is quantified according to the actual tension borne by the lower film, and when the reduction is not serious, the initial stamping speed is reduced to reduce the dynamic stress impact. When it is serious (the tension is close to the tension threshold corresponding to the yield strength), the safety range of the current lower film strength is reflected to exist an error, and the lower film cannot be safely protected when the length of the film roll and the traction roller accumulates. By changing the determination criterion, the safety range is corrected, and the accuracy and adaptability of judging and optimizing the delivery of the lower film before cold pressing are increased.

[0151] The process of determining the influence of the modified tension change on the upper film cold stamping and the upper and lower film heat sealing further comprises:

[0152] According to the several bubble caps (bubble cap edge sealing area of the lower film) generated after the lower film cold stamping and the several annular glue layers (heat seal glue area of the upper film) after the upper film heat seal glue coating, the alignment deviation of the bubble cap edge sealing area and the heat seal glue area of the upper and lower films within the fixed time before the heat pressing plate of the heat stamping after the cold stamping and the heat seal glue coating is predicted and analyzed;

[0153] The several annular glue layers (heat seal glue area of the upper film) need to be aligned with the several bubble caps (bubble cap edge sealing area of the lower film);

[0154] The encoder provided by the traction roller is used to detect the conveying length of the upper film and the lower film after the cold stamping and the heat seal glue coating in real time, and the coverage deviation value of the conveying length of the upper film and the conveying length of the lower film is calculated;

[0155] The coverage deviation value = |conveying length of upper film - conveying length of lower film|, when the coverage deviation value is less than or equal to the deviation evaluation value, it is judged that the alignment deviation of the upper and lower films is within a normal range, and the deviation trend of the heat seal glue area and the bubble cap edge sealing area is determined;

[0156] Specifically, the deviation trend is the ratio of the current coverage deviation value to the historical coverage deviation value, when the deviation trend is greater than one, it is judged that the deviation trend is getting larger, and the critical matching value is reduced according to the coverage deviation value;

[0157] When the coverage deviation value is greater than the deviation evaluation value, it is judged that there is an alignment deviation between the upper and lower films, and the defect point is marked;

[0158] Specifically, when there is an alignment deviation between the upper and lower films, the unwinding speed of the upper film roll is reduced or increased when the conveying length of the upper film is greater than or less than the conveying length of the lower film according to the ratio of the coverage deviation value to the fixed time;

[0159] In implementation, after the defect point is marked, the subsequent slitting device stops slitting for a fixed time when it passes through a single slitting timing to automatically remove the bubble cap packaging sheet with an alignment deviation.

[0160] The deviation evaluation value is 0.3 mm.

[0161] Specifically, since both the upper film and the lower film can have length accumulation, the degree of length accumulation is prone to cause deviation in heat sealing, and it is known that the upper and lower films of the paper-based blister sheet have recoverable elastic deformation. If the influence of length accumulation on deviation is detected before cold stamping and hot seal glue coating, the detection will be affected by the elastic deformation, resulting in false judgment. The method improves the accuracy of alignment deviation detection by detecting the conveying length of the upper film and the lower film after cold stamping and hot seal glue coating, and determines whether to mark the defect point according to the deviation level and the deviation trend of the deviation condition. The determination standard of the speed matching is adjusted according to the deviation trend, and the unwinding speed of the upper film roll is adjusted according to the coverage deviation value, so as to reduce the degree of length accumulation difference between the upper film and the lower film. By discussing the influence of the length accumulation of the upper and lower films, whether the blister edge sealing area of the lower film and the hot seal glue area of the upper film will have out-of-range deviation, the adaptability to different deviation conditions and the flexibility of heat sealing of the upper and lower films of the packaging sheet are increased.

[0162] An environmentally friendly high-barrier paper-based blister packaging sheet, comprising:

[0163] The upper film is a paper-based composite layered structure, which is composed of a composite paper-based layer and a hot seal glue area, and the hot seal glue area comprises a plurality of annular glue layers.

[0164] The lower film is a paper-based composite layered structure, and the composite paper-based layer of the lower film is stamped with a plurality of blisters. The plurality of blisters are distributed in a staggered manner, and the thickness of the paper-based layer of the lower film is greater than that of the upper film.

[0165] The composite paper-based layer comprises, from top to bottom, a varnish layer 101, an ink layer 102, a primer layer 103, a paper-based layer 104, a primer layer 103, and a plating layer 105.

[0166] Specifically, compared with the traditional aluminum-plastic blister packaging, the blister packaging sheet of the present application is a paper-based composite layered structure. In order to avoid tearing damage to the paper-based layer of the lower film during cold stamping of the lower film, the blisters of the composite paper-based layer of the lower film are distributed in a staggered manner during cold stamping.

[0167] The upper film is a seal-easy material, and the weight parameter range of the upper film is 30-100 g / m 2 ; the lower film is a bubble material, and the weight parameter range of the lower film is 60-400 g / m 2 ;

[0168] Material parameter range: the upper film has a grammage range of 30-100 g / m, and the lower film has a grammage range of 60-400 g / m;

[0169] The prepared blister packaging sheet has a barrier property requirement that the water vapor transmission amount is less than or equal to 2 g / (m 2 ·24h), and the oxygen transmission amount is less than or equal to 2 cm 3 / (m 2 ·24h·0.1 MPa).

[0170] Varnish: protect the ink, also has the functions of waterproof, moisture-proof and oil-proof.

[0171] Ink: the presentation of text and patterns, 0-5 g / m2, whether to print can be selected according to the needs;

[0172] Paper: it is the carrier of the printing layer as the base material, ink, primer, etc., generally with a thickness of 30 g-400 g / m2;

[0173] Material selection requirements:

[0174] Upper film paper, because it does not need to be punched into a shape, there is no related mechanical property requirement.

[0175] Lower film paper, because it has to be punched into a shape, so it has related mechanical property requirements. The performance requirements of the lower film paper are shown in the following table.

[0176]

[0177] Table 2 Performance requirements of lower film paper

[0178] Primer: enhance the adhesion of the plating layer, fill the pores of the paper, and improve the barrier property of the paper.

[0179] Generally, polyvinyl alcohol (PVA) paint is used for primer coating. After coating, the paper material fills the pores of the paper and improves the barrier property of the paper. PVA has high oxygen barrier property, and after priming, it also has the effect of enhancing the adhesion of the plating layer.

[0180] The coating amount of the primer coating is 3-10 g / m2 per layer;

[0181] Plating layer: barrier oxygen property, water vapor effect; generally, aluminum oxide is used for vacuum deposition to improve the barrier property of the material (including oxygen and water vapor barrier)

[0182] Heat-sealing glue: heat-sealing cooperation, good airtightness, easy to peel. The coating amount of the heat-sealing glue is 5-10 g / m 2 .

[0183] Specifically, the medicine / food blister packaging in the market at present is mostly aluminum-plastic blister packaging. It is inconvenient to recycle and is not environmentally friendly. The product of the present application is a recyclable and environmentally friendly high-barrier paper-based blister packaging material. The prepared blister packaging sheet is a single paper-based material, has high barrier properties, heat sealability, and is degradable, recyclable, and recyclable, and can replace the recyclable and environmentally friendly packaging of aluminum-plastic blister packaging. It helps to reduce the consumption of non-renewable resources by packaging bag materials, increases the combination of paper layers through the primer layer, and has little environmental pollution.

[0184] So far, the technical solutions of the present application have been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to related technical features without deviating from the principles of the present application, and the technical solutions after these changes or replacements will fall within the protection scope of the present application.

[0185] The above is only the preferred embodiment of the present application and is not used to limit the present application; for those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A process for the preparation of an environmentally friendly high barrier paper-based blister pack sheet, characterized in that, The method comprises the following steps: The upper film and the lower film of the paper-based blister packaging sheet are respectively wound into an upper film roll and a lower film roll, and the cold stamping target parameters of the lower film cold stamping into a blister are determined according to the difference of the layered structure of the lower film and the change of the blister depth requirement, the cold stamping target parameters being a target stamping force and a target stamping speed, the target stamping force = a safety factor * an actual thickness * a material yield strength * a stamping projection area, and the target stamping speed = a reference speed * (a reference thickness ÷ an actual thickness) * (a reference depth ÷ a required blister depth) 0.5 ​ Adjusting the safety factor and the reference speed according to the blister type, determining the critical elongation and the spraying amount of the upper film heat-seal adhesive area according to the change of the blister area; Determining the matching degree of the unwinding speed and the traction speed according to the speed matching value of the unwinding roller and the traction roller, wherein the speed matching value = | unwinding speed - traction speed | ÷ traction speed, determining whether to adjust the unwinding speed and predicting the accumulated length difference within the unwinding time; Confirming the influence of the corrected tension change on the upper film cold stamping and the upper and lower film heat sealing based on the predicted accumulated length difference exceeding the corresponding film roll strength error allowable range, or correcting the corresponding unwinding speed based on the predicted accumulated length difference not exceeding the corresponding film roll strength error allowable range; Calculating the consumption elongation according to the actual thickness and the actual tension change of the lower film, wherein the consumption elongation is the decrease degree of the plastic deformation ability of the lower film under the current actual tension, and adjusting the cold stamping target parameter when the decrease degree of the plastic deformation ability of the lower film is predicted to be within the normal range, or readjusting the accumulated length difference when the decrease degree of the plastic deformation ability of the lower film is predicted to exceed the normal range.

2. The process for the preparation of an environmentally friendly high barrier paper-based blister pack sheet according to claim 1, characterized in that, The layered structure difference of the lower film includes the actual thickness parameter difference and the material yield strength difference.

3. The process for the preparation of an environmentally friendly high barrier paper-based blister pack sheet according to claim 2, characterized in that, The adjusting process according to the blister type and the change of the blister area comprises the following steps: When the blister type changes, reducing the target stamping force by reducing the safety factor and reducing the target stamping speed by reducing the reference speed; When the area of a single blister increases, reducing the critical elongation according to the increase amplitude of the blister area and increasing the spraying amount of the ring-shaped adhesive layer according to the increase amplitude of the blister area; When the area of a single blister decreases, increasing the critical elongation according to the decrease amplitude of the blister area and decreasing the spraying amount of the ring-shaped adhesive layer according to the decrease amplitude of the blister area.

4. The process for the preparation of an environmentally friendly high barrier paper-based blister pack sheet according to claim 3, characterized in that, The process of determining the matching degree of the unwinding speed and the traction speed comprises the following steps: When the speed matching value is less than or equal to the critical matching value, judging that the unwinding speed and the traction speed are in the first matching degree, and predicting whether the accumulated length difference will exceed the corresponding film roll strength error allowable range before the corresponding film roll is unwound; When the speed matching value is greater than the critical matching value, judging that the unwinding speed and the traction speed are in the second matching degree, and adjusting the unwinding speed of the unwinding roller according to the speed difference between the unwinding speed and the traction speed.

5. The process for the preparation of an environmentally friendly high barrier paper-based blister pack sheet according to claim 4, characterized in that, Calculating the accumulated length difference; When the accumulated length difference is greater than or equal to the first standard value, predicting that the length accumulation will cause the tension change to exceed the corresponding film roll strength safety range, and correcting the unwinding speed of the corresponding unwinding roller; When the accumulated length difference is less than the first standard value and greater than the second standard value, confirming the influence of the corrected tension change on the upper film cold stamping and the upper and lower film heat sealing.

6. The process for the preparation of an environmentally friendly high barrier paper-based blister pack sheet according to claim 5, characterized in that, The process of confirming the influence of the corrected tension change on the upper film cold stamping and the upper and lower film heat sealing comprises the following steps: Detecting the actual tension of the lower film and calculating the consumption elongation based on the material parameters of the lower film, and predicting that the decrease degree of the plastic deformation ability of the lower film under the current actual tension is within the normal range when the consumption elongation is less than or equal to the critical elongation. When the consumption elongation is greater than the critical elongation, the predicted degree of plastic deformation capacity of the lower film under the current actual tension exceeds the normal range, and stamping according to the determined target stamping force and target stamping speed will cause the blister to not meet the requirements.

7. The process for the preparation of an environmentally friendly high barrier paper-based blister pack sheet according to claim 6, characterized in that, When the degree does not exceed the normal range, the target stamping force is increased according to the total elongation and the consumption elongation, and the target stamping speed is decreased according to the change of the target stamping force; When the degree exceeds the normal range, the first standard value is reduced according to the ratio of the consumption elongation and the total elongation of the material, and the unwinding speed of the unwinding roller is adjusted.

8. The process for preparing an environmentally friendly high-barrier paper-based blister pack sheet according to claim 1, characterized by, The process of confirming the influence of the adjusted tension change on the cold stamping of the upper film and the heat sealing of the upper and lower films further comprises: Obtaining the conveying length of the upper film and the lower film after cold stamping and hot glue coating to calculate the coverage deviation value, and determining the alignment deviation degree of the blister edge sealing area and the hot glue area; According to the alignment deviation degree, determine the deviation trend of the hot glue area and the blister edge sealing area to adjust the matching degree, or mark the defect point to adjust the cutting time and adjust the unwinding speed of the upper film roll.

9. The preparation method of the environmentally friendly high-barrier paper-based blister packaging sheet according to claim 8, wherein, The conveying length of the upper film and the lower film after cold stamping and hot glue coating is detected in real time, and the coverage deviation value of the upper film conveying length and the lower film conveying length is calculated; When the coverage deviation value is less than or equal to the deviation evaluation value, it is determined that the alignment deviation of the upper and lower films is within the normal range, and the deviation trend of the hot glue area and the blister edge sealing area is determined; When the coverage deviation value is greater than the deviation evaluation value, it is determined that there is an alignment deviation between the upper and lower films, and the defect point is marked.

10. The preparation method of the environmentally friendly high-barrier paper-based blister packaging sheet according to claim 9, wherein, When there is an alignment deviation between the upper and lower films, the unwinding speed of the upper film roll is reduced or increased according to the ratio of the coverage deviation value and the fixed time when the upper film conveying length is greater than or less than the lower film conveying length; After marking the defect point, the subsequent cutting device stops cutting for a fixed time when it passes through a single cutting time to remove the blister packaging sheet with an alignment deviation.

11. The preparation method of the environmentally friendly high-barrier paper-based blister packaging sheet according to claim 1, wherein, The production process of the upper film and the lower film is to coat the coating liquid to both sides of the paper base layer by roller coating or dip coating, to plate the layers on both sides of the coated paper base layer, and to determine whether to print the upper film on the outside according to the requirements, and to wind to prepare the upper film roll or the lower film roll; After the upper film is cold-stamped according to the cold-stamping target parameters and the lower film is coated with a hot glue layer, the two are combined by heat sealing to form a blister packaging sheet.

12. The process for preparing an environmentally friendly high-barrier paper-based blister pack sheet according to claim 1, characterized by, The control parameters of the primer coating include the coating material moving speed and the drying temperature; The moving speed is less than or equal to 200 m / min, the drying temperature is divided into three steps, one group is 50-80 DEG C, two groups are 70-100 DEG C, three groups are 90-120 DEG C, the coating amount of the primer is 3-10 g / m 2 / one side.

13. The process for preparing an environmentally friendly high-barrier paper-based blister pack sheet according to claim 1, characterized by, The plated layer of the upper and lower films is vacuum aluminum oxide plating, and when printing the upper film or the lower film, the printing speed is ≤350 m / min, and the drying temperature after printing is 40-80℃.

14. The process for preparing an environmentally friendly high-barrier paper-based blister pack sheet according to claim 1, characterized by, The control parameters of the gluing are consistent with the priming, and the coating amount of the heat-sealing glue during the gluing is 5-10 g / m 2 .

15. An environmentally friendly high-barrier paper-based blister packaging sheet prepared by the method according to any one of claims 1 to 14, characterized by, The upper film is a paper-based composite layered structure, which is composed of a composite paper base layer and a hot glue area, and the hot glue area includes a plurality of annular glue layers. ​ A lower film, which is a paper-based composite layered structure, the composite paper-based layer of the lower film is punched with a plurality of bubble caps, the plurality of bubble caps are distributed in a staggered manner, the thickness of the paper-based layer of the lower film is greater than the thickness of the paper-based layer of the upper film; The composite paper-based layer comprises, from top to bottom, a varnish layer, an ink layer, a primer layer, a paper-based layer, a primer layer, and a plating layer.

16. The environmentally friendly, high-barrier, paper-based blister pack sheet according to claim 15, characterized in that, The upper film has a weight parameter ranging from 30 g to 100 g / m 2 The lower film has a weight parameter ranging from 60 g to 400 g / m 2 ; The prepared blister pack sheet has a barrier property requirement of a water vapor transmission amount of 2 g / (m 2 ·24h) or less and an oxygen transmission amount of 2 cm 3 / (m 2 ·24h·0.1 MPa) or less.

17. The environmentally friendly high-barrier paper-based blister pack sheet according to claim 15, characterized by, The polyvinyl alcohol coating is used as a base coating, and the coating amount of the base coating is 3-10 g / m 2 / layer; The coating layer uses aluminum trioxide, and the coating amount of the heat-sealing adhesive is 5-10 g / m 2 .

Images