Packaging validity period calculation method, equipment and medium

Abstract

The invention provides a packaging validity period calculation method and device and a medium. The method comprises the steps that a single-factor oxygen content control validity period corresponding to the dosage of a deoxidant serves as an initial value of the oxygen content control validity period, and a single-factor humidity control validity period corresponding to the dosage of a drying agent serves as an initial value of the humidity control validity period; correcting the humidity control validity period according to the water production effect of the deoxidization reaction of the deoxidant; correcting the oxygen content control validity period according to the attenuation effect of a low-humidity environment formed by dehumidification of the drying agent on the deoxidizing efficiency of the deoxidant; iteratively calculating the corrected humidity control validity period and the corrected oxygen content control validity period until an iteration result converges; and according to the converged humidity control validity period and the converged oxygen content control validity period, determining a drying low-oxygen two-factor coupling validity period corresponding to the deoxidant dosage and the drying agent dosage. The accuracy and the reliability of the package drying low-oxygen validity period are improved.

Description

Technical Field

[0001] This disclosure relates to the field of semiconductor packaging technology, and in particular to a method, apparatus and medium for calculating packaging shelf life. Background Technology

[0002] As chip packaging processes and structures evolve, chip value increases, making the quality issues caused by chip pad oxidation a significant concern. Current chip packaging standards, based on authoritative industry associations like JEDEC and EIA, primarily focus on humidity control. However, besides humidity, oxygen content is another crucial factor related to pad oxidation. To avoid damage to the chips inside the bag due to excessive vacuum pressure, the actual packaging vacuum level is around 70%. This leaves residual air containing oxygen, and during long-term storage, especially with strategic chip storage periods increasing from one or two years to five years or longer, the amount of oxygen permeating from outside the packaging bag is substantial, further exacerbating the risk of pad oxidation. Pad oxidation can lead to issues like cold solder joints and solder rejection. The currently common practice of filling with inert gas and then heat-sealing only addresses the residual oxygen in the bag during packaging; it doesn't solve the problem of oxygen infiltration from outside the packaging bag over five years or more.

[0003] Besides chip packaging, food and pharmaceutical packaging also need to maintain a dry, low-oxygen environment: a dry, low-oxygen environment inside food packaging can inhibit mold growth, delay oil oxidation, and prevent food from becoming damp, moldy, and losing its flavor; maintaining a dry, low-oxygen environment inside pharmaceutical packaging can prevent the active ingredients in the medicine from absorbing moisture, decomposing, oxidizing, and becoming ineffective, thus ensuring the stability of the drug's efficacy.

[0004] To maintain a dry, low-oxygen environment, desiccants and oxygen scavengers are often placed inside packaging. The effective period for these desiccants and oxygen scavengers to maintain this environment needs to be calculated. However, current technologies often use a two-factor independent calculation method for the effective period: the humidity control effective period is determined based on the amount of desiccant, and the oxygen content control effective period is determined based on the amount of oxygen scavenger. This ignores the impact of deoxygenation reaction wastewater on humidity and the attenuation effect of low humidity on deoxygenation efficiency. This can easily lead to overestimation of the effective period, resulting in problems such as chip pad oxidation, food mold, and pharmaceutical failure before the calculated effective period is reached, failing to meet the reliability requirements for long-term storage. Summary of the Invention

[0005] This disclosure provides a method, apparatus, and medium for calculating the shelf life of packaging, in order to solve the problem of inaccurate calculation of the shelf life of packaging in dry and low-oxygen environments.

[0006] To address the aforementioned problems, firstly, a method for calculating packaging shelf life is provided, the method comprising: The effective period of single-factor oxygen content control corresponding to the amount of oxygen scavenger is taken as the initial value of the effective period of oxygen content control, and the effective period of single-factor humidity control corresponding to the amount of desiccant is taken as the initial value of the effective period of humidity control. The validity period of humidity control is corrected based on the water production effect of the deoxygenation reaction of the deoxygenating agent; the validity period of oxygen content control is corrected based on the attenuation effect of the low humidity environment formed by desiccant dehumidification on the deoxygenation efficiency of the deoxygenating agent; the corrected validity period of humidity control and the corrected validity period of oxygen content control are iteratively calculated until the iteration results converge. Based on the effective period of humidity control and oxygen content control after convergence, the effective period of the drying low-oxygen dual-factor coupling corresponding to the dosage of the oxygen remover and the dosage of the desiccant is determined.

[0007] In conjunction with the first aspect, in one possible implementation, before determining the initial value of the oxygen content control validity period based on the amount of oxygen scavenger used, the method further includes: The initial residual oxygen content in the packaging is determined based on the residual space volume and the initial oxygen volume fraction within the packaging. Based on the target oxygen content control validity period, the oxygen permeability of the packaging, and the oxygen permeability area of ​​the packaging, determine the packaging oxygen permeability within the target oxygen content control validity period. The total oxygen requirement of the oxygen absorber is determined based on the initial residual oxygen content and the target oxygen content within the packaging, controlling the oxygen permeability of the packaging during its shelf life. The baseline dosage of the oxygen absorber is determined based on the total oxygen requirement and the effective oxygen absorption capacity of the oxygen absorber. The required amount of scavenger is obtained by adding a reserve amount of scavenger to the baseline amount of scavenger.

[0008] In conjunction with the first aspect, in one possible implementation, before determining the initial value of the humidity control validity period based on the amount of desiccant used, the method further includes: The initial residual water content inside the packaging is determined based on the volume of the remaining space inside the packaging and the initial humidity inside the packaging. Based on the target humidity control validity period, the water vapor transmission rate of the packaging, and the moisture permeability area of ​​the packaging, determine the packaging moisture permeability within the target humidity control validity period; The total moisture absorption capacity of the desiccant is determined based on the initial residual water content in the packaging and the moisture permeability of the packaging during the target humidity control period. The baseline dosage of desiccant is determined based on the total moisture absorption requirement and the effective moisture absorption capacity of the desiccant. The desiccant dosage is obtained by adding a desiccant reserve to the baseline dosage.

[0009] In conjunction with the first aspect, in one possible implementation, correcting the validity period of the humidity control based on the water production effect of the deoxygenation reaction of the deoxygenating agent includes: Based on the theoretical water production corresponding to the amount of deoxygenating agent used and the exponential saturation term regarding the effective period of oxygen content control, the total water production within the effective period of oxygen content control is determined. Based on the total water production and the moisture permeability of the packaging, determine the amount of humidity control validity period loss caused by deoxygenated water production within the oxygen content control validity period. The validity period of the humidity control is corrected based on the amount of loss during the validity period of the humidity control.

[0010] In conjunction with the first aspect, in one possible implementation, determining the total water production within the effective period of oxygen content control based on the theoretical water production corresponding to the amount of oxygen scavenger and the exponential saturation term regarding the effective period of oxygen content control includes: According to the formula Determine the total water production during the effective period of oxygen content control. ; in, For the first The effective period of oxygen content control after the next iteration This refers to the dosage of oxygen scavenger. This represents the theoretical oxygen absorption capacity of the oxygen scavenger. This refers to the basic efficiency of the oxygen scavenger. This is an exponential saturation term relating to the effective period of oxygen content control. The deoxygenation reaction rate constant is The water production coefficient is the unit oxygen intake.

[0011] In conjunction with the first aspect, in one possible implementation, the correction of the oxygen content control validity period based on the attenuation effect of the low humidity environment created by dehumidification on the oxygen removal efficiency of the deoxygenating agent includes: If the effective period of humidity control exceeds the threshold of low humidity impact time, determine the amount of oxygen content control effective period loss caused by the effective period of humidity control. The validity period of the oxygen content control is corrected based on the amount of loss during the validity period of the oxygen content control.

[0012] In conjunction with the first aspect, in one possible implementation, determining the loss of oxygen content control validity period due to the humidity control validity period when the humidity control validity period exceeds the low humidity impact time threshold includes: When the effective period of humidity control exceeds the threshold of low humidity impact time, the oxygen content control effective period loss function is used. Determine the amount of oxygen content control validity period loss caused by the humidity control validity period. ; in, For the first The validity period of humidity control after the next iteration. For the first The effective period of oxygen content control after the next iteration This is the deoxygenation efficiency decay constant. The time threshold for the effect of low humidity.

[0013] In conjunction with the first aspect, in one possible implementation, determining the drying low-oxygen dual-factor coupling validity period corresponding to the oxygen scavenger dosage and the desiccant dosage based on the converged humidity control validity period and the converged oxygen content control validity period includes: The minimum of the effective period of humidity control after convergence and the effective period of oxygen content control after convergence is determined as the effective period of the dual-factor coupling of drying and low oxygen corresponding to the amount of oxygen remover and the amount of desiccant.

[0014] In a second aspect, a computer device is provided, comprising: a processor, a memory, and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the computer device is running, the processor communicates with the memory via the bus, and the machine-readable instructions, when executed by the processor, perform the steps of a packaging expiration date calculation method as described in the first aspect, or in combination with any possible implementation of the first aspect.

[0015] Thirdly, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, performs the steps of a packaging expiration date calculation method as described in the first aspect, or in conjunction with any possible embodiment of the first aspect.

[0016] The beneficial effects of the embodiments disclosed herein include: 1. Based on the water production effect of the deoxygenation reaction of the deoxygenating agent and the attenuation effect of the low humidity environment formed by the dehumidification of the deoxygenating agent on the deoxygenation efficiency of the deoxygenating agent, this disclosure performs bidirectional feedback correction on the validity period of oxygen content control and humidity control, restores the dynamic interaction process of the two factors of humidity and oxygen content, effectively corrects the limitation of ignoring the interaction effect of the two factors when calculating the single factor independently, and improves the accuracy and reliability of the low oxygen validity period of packaging drying.

[0017] 2. When correcting the validity period of humidity control based on the water production effect of the deoxygenation reaction of the deoxygenating agent, an exponential saturation term for the validity period of oxygen content control is introduced based on the theoretical water production corresponding to the amount of deoxygenating agent used, to restore the true kinetic process of the deoxygenation reaction. This exponential saturation term can characterize the deoxygenated water production as a function of the validity period of oxygen content control, which shows an exponential saturation type change of "rapid water production in the initial stage, and slowing down the water production in the later stage due to the decrease in the activity of the deoxygenating agent". It reflects the nonlinear relationship that "the longer the validity period of oxygen content control, the heavier the burden of humidity control, but the growth rate slows down", effectively avoiding the deviation problem in the calculation of the long-term validity period and further improving the accuracy of the validity period calculation.

[0018] 3. When correcting the oxygen content control validity period based on the attenuation effect of low humidity environment on the oxygen removal efficiency of deoxygenating agent, the dynamic correlation between humidity control validity period and the degree of deoxygenation efficiency attenuation is quantified by introducing a low humidity influence time threshold and an exponential saturation term regarding humidity control validity period. This effectively solves the technical pain point of existing technologies that use static coefficient correction and cannot cover the time dimension of deoxygenation efficiency attenuation, further improving the adaptability and accuracy of validity period calculation: The combination of the low humidity influence time threshold and the exponential saturation term regarding humidity control validity period reflects that when the humidity control validity period exceeds the low humidity influence time threshold, the degree of deoxygenation efficiency attenuation shows an exponentially increasing trend as the humidity control validity period extends, "initially rising rapidly, then slowing down and stabilizing in the later stage," reflecting the rule that "short-term low humidity has no significant impact on deoxygenation efficiency, while long-term low humidity will lead to a significant attenuation of deoxygenation efficiency."

[0019] 4. The method for determining the dosage of desiccant and desiccant in this disclosure abandons the crude method of relying on empirical estimation (such as by packaging volume × fixed coefficient) in the prior art. Instead, it derives the baseline dosage by accurately quantifying the single-factor load and adds a reserve margin to determine the final dosage. This method ensures that the single-factor validity period (the initial value used in the iterative calculation) is higher than the target validity period, avoiding the iterative divergence problem caused by deviation of the initial value. It can converge with only a few iterations, greatly improving the engineering practicality and computational efficiency of the method, and laying a precise initial foundation for subsequent two-factor interactive correction. Attached Figure Description

[0020] Figure 1 A flowchart illustrating a method for calculating the shelf life of packaging provided in this embodiment of the disclosure. Detailed Implementation

[0021] This disclosure provides a method, apparatus, and medium for calculating packaging shelf life. Preferred embodiments of this disclosure are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustrative and explanatory purposes only and are not intended to limit the scope of this disclosure. Furthermore, the embodiments and features described herein can be combined with each other unless otherwise specified.

[0022] This disclosure provides a method for calculating the shelf life of packaging. Figure 1 A flowchart of a method for calculating the shelf life of packaging provided in this disclosure embodiment is shown below. Figure 1 As shown, the method includes: S101. The effective period of single-factor oxygen content control corresponding to the amount of oxygen remover is taken as the initial value of the effective period of oxygen content control, and the effective period of single-factor humidity control corresponding to the amount of desiccant is taken as the initial value of the effective period of humidity control.

[0023] S102. Based on the water production effect of the deoxygenation reaction of the deoxygenating agent, the validity period of humidity control is corrected; based on the attenuation effect of the low humidity environment formed by desiccant dehumidification on the deoxygenation efficiency of the deoxygenating agent, the validity period of oxygen content control is corrected; the corrected validity period of humidity control and the corrected validity period of oxygen content control are iteratively calculated until the iteration results converge.

[0024] S103. Based on the effective period of humidity control and oxygen content control after convergence, determine the effective period of the drying low-oxygen dual-factor coupling corresponding to the dosage of oxygen remover and desiccant.

[0025] In this embodiment, the effective period of single-factor oxygen content control is determined without considering the attenuation effect of low humidity on deoxygenation efficiency, and the effective period of single-factor humidity control is determined without considering the water production effect of the deoxygenation reaction. This disclosure combines the influence of the water production effect of the deoxygenating agent's deoxygenation reaction on the effective period of humidity control, and the attenuation effect of the low humidity environment created by desiccant dehumidification on deoxygenation efficiency (because the deoxygenation reaction requires water catalysis), to perform bidirectional feedback correction on the effective period of humidity control and oxygen content control. This effectively corrects the limitation of ignoring the interaction between two factors when calculating single factors independently, and improves the scientific rigor and accuracy of the effective period calculation.

[0026] In practical applications, there is usually a clear expectation of the duration for which the packaging maintains a dry and low-oxygen environment (i.e., the target shelf life). For example, the target shelf life of chip packaging can be set at 5 years (1825 days). If the dry and low-oxygen dual-factor coupling shelf life obtained by the above method is lower than the target shelf life, it is necessary to adjust the dosage of oxygen scavenger and desiccant until the dry and low-oxygen dual-factor coupling shelf life meets the preset target requirements (e.g., greater than or equal to the target shelf life).

[0027] In some embodiments, once the effective period of the drying and low-oxygen dual-factor coupling corresponding to the dosage of oxygen scavenger and desiccant has met the target effective period requirement, in order to further improve the long-term reliability of the packaging environment and cope with uncertainties such as material batch performance fluctuations and actual storage environment deviations, a preset safety factor can be added on the basis of the dosage of oxygen scavenger and desiccant that meets the target requirements to reserve redundancy, so as to ensure the stability and anti-interference ability of the drying and low-oxygen environment maintenance effect.

[0028] For example, the amount of oxygen absorber with a preset safety factor is equal to the original amount of oxygen absorber multiplied by the preset safety factor, and the amount of desiccant with a preset safety factor is equal to the original amount of desiccant multiplied by the preset safety factor. For instance, the preset safety factor needs to be determined according to the product's risk level: 1.2 for pharmaceutical packaging (high risk), 1.1 for food packaging, and 1.05 for electronic components (low risk).

[0029] To avoid repeated adjustments to dosage and iterative divergence, the following provides a scheme for determining the dosage of oxygen absorber and a scheme for determining the dosage of desiccant.

[0030] In another embodiment provided in this disclosure, before determining the initial value of the oxygen content control validity period based on the amount of oxygen scavenger, the method further includes: The initial residual oxygen content in the packaging is determined based on the residual space volume and the initial oxygen volume fraction within the packaging. Based on the target oxygen content control validity period, the oxygen permeability of the packaging, and the oxygen permeability area of ​​the packaging, determine the packaging oxygen permeability within the target oxygen content control validity period. The total oxygen requirement of the oxygen absorber is determined by controlling the oxygen permeability of the packaging within its shelf life based on the initial residual oxygen content and the target oxygen content within the packaging. The baseline dosage of the oxygen absorber is determined based on the total oxygen requirement and the effective oxygen absorption capacity of the oxygen absorber. The amount of scavenger is obtained by adding a reserve amount of scavenger to the standard amount of scavenger.

[0031] For example, if the packaging vacuum degree is 70%, the packaging space volume is 4000ml, and the initial oxygen volume fraction in the packaging is 21%, then the initial residual oxygen content in the packaging = residual space volume in the packaging × initial oxygen volume fraction in the packaging = packaging space volume × (1 - packaging vacuum degree) × initial oxygen volume fraction in the packaging = (4000 × 30%) × 0.21 = 252mL.

[0032] The target shelf life is 5 years (1825 days), and the oxygen permeability of the packaging is 0.02 mL / (m²). 2 (day), the oxygen permeable area of ​​the packaging is 0.2 m². 2The oxygen permeability of the packaging within the target oxygen content control period = oxygen permeability of the packaging × oxygen permeable area of ​​the packaging × target shelf life = 0.02 × 0.2 × 1825 = 7.3 mL.

[0033] The total oxygen absorption capacity required by the oxygen scavenger = initial residual oxygen content in the packaging + oxygen permeability of the packaging within the target oxygen content control period = 252 + 7.3 = 259.3 mL.

[0034] The theoretical oxygen absorption capacity of the oxygen scavenger is 100 mL / g (the maximum volume of oxygen that each gram of oxygen scavenger can absorb at 21% oxygen content), and the basic efficiency of the oxygen scavenger is 0.85 (the ratio of actual oxygen absorption to theoretical oxygen absorption at 25℃ / 50% RH). The effective oxygen absorption capacity of the oxygen scavenger = theoretical oxygen absorption capacity of the oxygen scavenger × basic efficiency of the oxygen scavenger = 100 × 0.85 = 85 mL / g.

[0035] The standard dosage of scavenger = total oxygen demand of scavenger / effective oxygen absorption capacity of scavenger = 259.3 / 85 ≈ 3.05g. Adding 1.4 times the reserve allowance of scavenger (the reserve allowance coefficient of scavenger is 1.4), the dosage of scavenger = standard dosage of scavenger × reserve allowance coefficient of scavenger = 3.05 × 1.4 ≈ 4.4g.

[0036] After determining the dosage of the oxygen scavenger, verify whether the effective period of single-factor oxygen content control corresponding to this dosage is greater than the target effective period: Total oxygen intrusion rate = oxygen permeability of packaging × oxygen permeable area of ​​packaging + initial residual oxygen content in packaging / target effective period = 0.02 × 0.2 + 252 / 1825 ≈ 0.142 mL / day; The effective period of single-factor oxygen content control corresponding to a dosage of 4.4 g oxygen scavenger = dosage of oxygen scavenger × effective oxygen absorption capacity of oxygen scavenger / total oxygen intrusion rate = (4.4 × 85) / 0.142 ≈ 374 / 0.142 ≈ 2634 days > 1825 days (target effective period).

[0037] In another embodiment provided in this disclosure, before determining the initial value of the humidity control validity period based on the amount of desiccant, the method further includes: The initial residual water content inside the packaging is determined based on the volume of the remaining space inside the packaging and the initial humidity inside the packaging. Based on the target humidity control validity period, the water vapor transmission rate of the packaging, and the moisture permeability area of ​​the packaging, determine the packaging moisture permeability within the target humidity control validity period; The total moisture absorption capacity of the desiccant is determined based on the initial residual water content in the packaging and the moisture permeability of the packaging during the target humidity control period. The baseline dosage of desiccant is determined based on the total moisture absorption requirement and the effective moisture absorption capacity of the desiccant. The desiccant dosage is obtained by adding a reserve amount of desiccant to the standard dosage.

[0038] For example, if the packaging vacuum degree is 70%, the packaging space volume is 4000ml, and the initial humidity inside the packaging is the absolute humidity under the condition of 25℃ / 5% RH, then the initial residual water content inside the packaging = residual space volume inside the packaging × initial humidity inside the packaging = packaging space volume × (1 - packaging vacuum degree) × initial humidity inside the packaging = (4000 × 30%) × 10 -6 m 3 / mL×0.9g / m 3 ≈0.00108g.

[0039] The target shelf life is 5 years (1825 days), and the water vapor permeability of the packaging is 0.03 g / (m²). 2 •day), the moisture permeable area of ​​the packaging is 0.2 m². 2 The moisture permeability of the packaging within the target humidity control validity period = moisture permeability of the packaging × moisture permeable area of ​​the packaging × target validity period = 0.03 × 0.2 × 1825 = 10.95g.

[0040] The initial residual water content in the packaging is 0.00108g, which is small and negligible. The total moisture absorption capacity of the desiccant is determined to be 10.95g of moisture permeability within the target humidity control period.

[0041] The theoretical moisture absorption capacity of the desiccant is 0.13 g / g (the maximum mass of water vapor that each gram of desiccant can adsorb at 5% RH), and the desiccant efficiency is 0.9 (the ratio of actual moisture absorption to theoretical moisture absorption (considering air permeability loss)). The effective moisture absorption capacity of the desiccant = theoretical moisture absorption capacity of the desiccant × desiccant efficiency = 0.13 × 0.9 = 0.117 g / g.

[0042] The standard amount of desiccant = total moisture absorption required by the desiccant / effective moisture absorption capacity of the desiccant = 10.95 / 0.117 ≈ 93.6g. Adding 1.025 times the desiccant reserve (the desiccant reserve coefficient is 1.025), the amount of desiccant used = standard amount of desiccant × desiccant reserve coefficient = 93.6 × 1.025 ≈ 96g.

[0043] After determining the amount of desiccant used, verify whether the effective period of single-factor humidity control corresponding to this amount of desiccant is greater than the target effective period: Water vapor intrusion rate of packaging = Water vapor transmission rate of packaging × Oxygen permeable area of ​​packaging = 0.03 × 0.2 × 0.006 g / day; Effective period of single-factor humidity control corresponding to 96 g of desiccant = Desiccant amount × Effective moisture absorption capacity of desiccant / Water vapor intrusion rate = (96 × 0.117) / 0.006 = 1872 days > 1825 days (target effective period).

[0044] In another embodiment provided in this disclosure, the effective period of humidity control is corrected based on the water production effect of the deoxygenation reaction of the deoxygenating agent, including: S201. Based on the theoretical water production corresponding to the amount of deoxygenating agent and the exponential saturation term regarding the effective period of oxygen content control, determine the total water production within the effective period of oxygen content control.

[0045] In this embodiment of the disclosure, when correcting the validity period of humidity control based on the water production effect of the deoxygenation reaction of the deoxygenating agent, an exponential saturation term related to the validity period of oxygen content control is introduced based on the theoretical water production corresponding to the amount of deoxygenating agent used, to restore the true kinetic process of the deoxygenation reaction. This exponential saturation term can characterize the deoxygenated water production as a function of the validity period of oxygen content control, which is characterized by "rapid initial water production, and slower water production in the later stage due to the decrease in the activity of the deoxygenating agent". It reflects the nonlinear correlation that "the longer the validity period of oxygen content control, the heavier the burden of humidity control, but the slower the growth rate", effectively avoiding the deviation problem in the calculation of the long-term validity period and further improving the accuracy of the validity period calculation.

[0046] As one possible implementation, the total water production within the effective period of oxygen content control is determined based on the theoretical water production corresponding to the amount of deoxygenating agent used and the exponential saturation term regarding the effective period of oxygen content control, including: According to the formula Determine the total water production during the effective period of oxygen content control. ; in, For the first The effective period of oxygen content control after the next iteration This refers to the dosage of oxygen scavenger. This represents the theoretical oxygen absorption capacity of the oxygen scavenger. This refers to the basic efficiency of the oxygen scavenger. This is an exponential saturation term relating to the effective period of oxygen content control. The deoxygenation reaction rate constant is The water production coefficient is the unit oxygen intake.

[0047] In this embodiment of the disclosure, the deoxygenation reaction rate constant This parameter, used to describe the cumulative rate of deoxygenated permeate over time, needs to be determined through isothermal experiments and calibrated according to actual environmental conditions: for example, the deoxygenation reaction rate constant measured at 28°C. The rate is 0.001 / day; when the temperature rises to 35℃, the deoxygenation reaction rate increases, and the deoxygenation reaction rate constant... It needs to be corrected to 0.0015 / day.

[0048] Water production coefficient per unit oxygen intake This coefficient characterizes the amount of free water to be adsorbed (including a 10% release rate of water of crystallization) generated per 1 mL of oxygen absorbed by the oxygen scavenger. It is determined through a combination of stoichiometric derivation of chemical reactions and experimental verification. For example, it represents the water production coefficient per unit oxygen absorption. The value is 0.006 g / mL.

[0049] S202. Based on the total water production and the moisture permeability of the packaging, determine the amount of moisture control loss due to deoxygenated water production within the oxygen content control validity period.

[0050] For example, the moisture permeability of the packaging is determined based on the water vapor transmission rate and the moisture permeable area of ​​the packaging, according to the humidity control shelf-life loss function. Determine the amount of humidity control validity period lost due to deoxygenated water production within the oxygen content control validity period. ,in, For the moisture permeability of the packaging, This refers to the moisture-permeable area of ​​the packaging.

[0051] S203. Adjust the humidity control validity period according to the amount of loss during the humidity control validity period.

[0052] For example, the corrected humidity control validity period = the humidity control validity period after the previous iteration - the amount of humidity control validity period loss.

[0053] In another embodiment provided in this disclosure, the oxygen content control validity period is corrected based on the attenuation effect of the low humidity environment formed by dehumidification on the oxygen removal efficiency of the deoxygenating agent, including: S301. When the effective period of humidity control exceeds the threshold of low humidity influence time, determine the amount of oxygen content control effective period loss caused by the effective period of humidity control.

[0054] In this embodiment of the disclosure, the low humidity effect time threshold is the longest time during which a low humidity environment has no significant impact on deoxygenation efficiency. The time threshold for the impact of low humidity is determined through long-term stability experiments. For example, through a 5%~30% RH variable humidity test, the time threshold for the impact of low humidity is determined to be 30 days. In practical applications, the time threshold for the impact of low humidity needs to be calibrated according to the actual environmental humidity.

[0055] S302. Correct the oxygen content control validity period based on the loss during the oxygen content control validity period.

[0056] For example, the corrected oxygen content control validity period = the oxygen content control validity period after the previous iteration - the loss of oxygen content control validity period.

[0057] In another embodiment provided in this disclosure, when the humidity control validity period exceeds the low humidity impact time threshold, determining the oxygen content control validity period loss caused by the humidity control validity period includes: When the effective period of humidity control exceeds the threshold of low humidity impact time, the oxygen content control effective period loss function is used. Determine the amount of oxygen content loss due to the humidity control validity period. ; in, For the first The validity period of humidity control after the next iteration. For the first The effective period of oxygen content control after the next iteration This is the deoxygenation efficiency decay constant. The time threshold for the effect of low humidity.

[0058] In this embodiment of the disclosure, the low humidity impact time threshold is related to the exponential saturation term regarding the effective period of humidity control. The combination of these factors reflects that when the effective period of humidity control exceeds the threshold of the time when low humidity affects deoxygenation efficiency, the degree of deoxygenation efficiency decay exhibits an exponentially increasing trend as the effective period of humidity control extends, characterized by "an initial rapid increase followed by a slowdown and eventual stabilization." This reflects the pattern that "short-term low humidity has no significant impact on deoxygenation efficiency, while long-term low humidity leads to a significant decay in deoxygenation efficiency."

[0059] Deoxygenation efficiency decay constant This term describes the rate at which deoxygenation efficiency decreases in low-humidity environments. For example, it is determined through a variable humidity experiment ranging from 5% to 30% RH, and is the deoxygenation efficiency decay constant. The value is set to 0.002 / day; in practical applications, the deoxygenation efficiency decay constant needs to be adjusted according to environmental conditions. Perform calibration.

[0060] In another embodiment provided in this disclosure, S103 determines the drying low-oxygen dual-factor coupling validity period corresponding to the amount of oxygen scavenger and the amount of desiccant based on the validity period of the converged humidity control and the validity period of the converged oxygen content control, including: determining the minimum value between the validity period of the converged humidity control and the validity period of the converged oxygen content control as the drying low-oxygen dual-factor coupling validity period corresponding to the amount of oxygen scavenger and the amount of desiccant.

[0061] For example, the amount of oxygen scavenger used is 4.4 g, and the effective period for single-factor oxygen content control corresponding to this amount of oxygen scavenger is 2634 days; the amount of desiccant used is 96 g, and the effective period for single-factor humidity control corresponding to this amount of desiccant is 1872 days; the effective period for single-factor oxygen content control of 2634 days is taken as the initial value of the effective period of oxygen content control. The validity period of this single-factor humidity control, 1872 days, is taken as the initial value for the validity period of humidity control. .

[0062] Based on the aforementioned humidity control validity period loss function and the aforementioned oxygen content control effective period loss function The corrected validity periods of humidity control and oxygen content control are calculated iteratively until the iteration results converge. ; .

[0063] Oxygen scavenger dosage The theoretical oxygen absorption capacity of the oxygen scavenger is 4.4g. The basic efficiency of the oxygen scavenger is 100 mL / g (the maximum volume of oxygen that each gram of oxygen scavenger can absorb at 21% oxygen content). It is 0.85 (the ratio of actual oxygen uptake to theoretical oxygen uptake at 25℃ / 50% RH). Deoxygenation reaction rate constant 0.001 / day (describes the rate of accumulation of deoxygenated permeate over time (at 28°C)), permeate coefficient per unit oxygen intake. The water vapor transmission rate of the packaging is 0.006 (the amount of free water to be adsorbed (including 10% water of crystallization release rate) generated per 1 mL of oxygen absorbed by the oxygen scavenger). 0.03 mL / (m 2 •day), packaging moisture permeable area 0.2m 2 .

[0064] Deoxygenation efficiency decay constant The value is 0.002 / day (describing the rate at which deoxygenation efficiency decreases in low humidity environments (at 5% RH)), representing the time threshold for the effect of low humidity. It lasts for 30 days.

[0065] In the first round of iterative calculation: Humidity control shelf life loss =(4.4×100×0.85×(1- e^(-0.001×2634))×0.006) / (0.03×0.2)≈37 days; Corrected humidity control validity period =1872-37=1835 days; Oxygen content control shelf life loss =2634×(1-e^(-0.002×(30-1872)))=790 days; Corrected oxygen content control validity period =2634-790=1844 days; Convergence criteria: =|1835-1872|=37 days > 1 day =|1844-2634|=790 days>1 day, so iterative calculations need to continue.

[0066] Table 1 is a convergence table for iterative correction of the effective period of a dry and low-oxygen dual-factor coupling system provided in the embodiments of this disclosure. Table 1 shows the effective period of humidity control and the effective period of oxygen content control after the 2nd to 5th iterations.

[0067] Table 1

[0068] As shown in Table 1, the effective period of humidity control after convergence is 1826 days, and the effective period of oxygen content control after convergence is 1825 days. The smaller value of the two, 1825 days, is determined as the effective period of the dry and low oxygen dual-factor coupling. This effective period of the dry and low oxygen dual-factor coupling meets the target effective period (1825 days).

[0069] The above iterative process simulates the dynamic feedback loop of humidity and oxygen content throughout the entire life cycle of the packaging: 1. Oxygen scavengers consume oxygen → generate free water → desiccants need to absorb moisture additionally → shorten the effective period of humidity control; 2. Shortened humidity control validity period → Increased use of oxygen scavengers in low humidity environments → Accelerated degradation of oxygen scavenger efficiency → Shortened oxygen content control validity period; 3. Shortened oxygen content control validity period → reduced deoxygenation water production → reduced desiccant load → slightly increased humidity control validity period; 4. Repeat steps 1-3 until the change in the validity period of humidity control and the change in the validity period of oxygen content control are both less than 1 day (iterative convergence). The validity period of humidity control and the validity period of oxygen content control after convergence are the true validity periods under the mutual constraints of the two factors. This disclosure provides a computer device, including a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the computer device is running, the processor communicates with the memory via the bus. When the machine-readable instructions are executed by the processor, they perform the steps of a packaging expiration date calculation method provided in any embodiment of this disclosure.

[0070] The computer device provided in this disclosure includes a processor, a memory, and a bus. The memory, also known as internal memory, stores execution instructions and includes main memory and external memory. The main memory temporarily stores data processed by the processor, as well as data exchanged with external storage devices such as hard disks. The processor exchanges data with external storage devices through main memory. When the electronic device is running, the processor and memory communicate via the bus, enabling the processor to execute the following instructions: The single-factor oxygen content control validity period corresponding to the oxygen absorber dosage is used as the initial value of the oxygen content control validity period, and the single-factor humidity control validity period corresponding to the desiccant dosage is used as the initial value of the humidity control validity period. The humidity control validity period is corrected based on the water production effect of the oxygen absorber's deoxygenation reaction. The oxygen content control validity period is also corrected based on the attenuation effect of the low humidity environment created by the desiccant dehumidification on the oxygen absorber's deoxygenation efficiency. The corrected humidity control validity period and the corrected oxygen content control validity period are iteratively calculated until the iteration results converge. Based on the converged humidity control validity period and the converged oxygen content control validity period, the dual-factor coupling validity period of drying and low oxygen corresponding to the oxygen absorber dosage and the desiccant dosage is determined.

[0071] This disclosure provides a computer-readable storage medium storing a computer program. When executed by a processor, the computer program performs the steps of a packaging shelf-life calculation method provided in any embodiment of this disclosure. The storage medium can be volatile or non-volatile computer-readable storage.

[0072] Through the above description of the embodiments, those skilled in the art can clearly understand that the embodiments of this disclosure can be implemented in hardware or by means of software plus necessary general-purpose hardware platforms. Based on this understanding, the technical solutions of the embodiments of this disclosure can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (such as a CD-ROM, USB flash drive, mobile hard drive, etc.) and includes several instructions to cause a computer device (such as a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments of this disclosure.

[0073] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred embodiment, and the modules or processes in the drawings are not necessarily essential for implementing this disclosure.

[0074] The sequence numbers of the embodiments disclosed above are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0075] Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, this disclosure is also intended to include such modifications and variations.

Claims

1. A method for calculating the shelf life of packaging, characterized in that, The method includes: The effective period of single-factor oxygen content control corresponding to the amount of oxygen scavenger is taken as the initial value of the effective period of oxygen content control, and the effective period of single-factor humidity control corresponding to the amount of desiccant is taken as the initial value of the effective period of humidity control. The validity period of humidity control is corrected based on the water production effect of the deoxygenation reaction of the deoxygenating agent; the validity period of oxygen content control is corrected based on the attenuation effect of the low humidity environment formed by desiccant dehumidification on the deoxygenation efficiency of the deoxygenating agent; the corrected validity period of humidity control and the corrected validity period of oxygen content control are iteratively calculated until the iteration results converge. Based on the effective period of humidity control and oxygen content control after convergence, the effective period of the drying low-oxygen dual-factor coupling corresponding to the dosage of the oxygen remover and the dosage of the desiccant is determined.

2. The method according to claim 1, characterized in that, Before determining the initial value of the oxygen content control validity period based on the amount of oxygen scavenger, the method further includes: The initial residual oxygen content in the packaging is determined based on the residual space volume and the initial oxygen volume fraction within the packaging. Based on the target oxygen content control validity period, the oxygen permeability of the packaging, and the oxygen permeability area of ​​the packaging, determine the packaging oxygen permeability within the target oxygen content control validity period. Based on the initial residual oxygen content and target oxygen content in the packaging, control the oxygen permeability of the packaging within the shelf life, and determine the total oxygen requirement of the oxygen absorber. The baseline dosage of the oxygen absorber is determined based on the total oxygen requirement and the effective oxygen absorption capacity of the oxygen absorber. The required amount of scavenger is obtained by adding a reserve amount of scavenger to the baseline amount of scavenger.

3. The method according to claim 1, characterized in that, Before determining the initial value of the humidity control validity period based on the amount of desiccant used, the method further includes: The initial residual water content inside the packaging is determined based on the volume of the remaining space inside the packaging and the initial humidity inside the packaging. Based on the target humidity control validity period, the water vapor transmission rate of the packaging, and the moisture permeability area of ​​the packaging, determine the packaging moisture permeability within the target humidity control validity period; The total moisture absorption capacity of the desiccant is determined based on the initial residual water content in the packaging and the moisture permeability of the packaging during the target humidity control period. The baseline dosage of desiccant is determined based on the total moisture absorption requirement and the effective moisture absorption capacity of the desiccant. The desiccant dosage is obtained by adding a desiccant reserve to the baseline dosage.

4. The method according to claim 1, characterized in that, The correction of the humidity control validity period based on the water production effect of the deoxygenation reaction of the deoxygenating agent includes: Based on the theoretical water production corresponding to the amount of deoxygenating agent used and the exponential saturation term regarding the effective period of oxygen content control, the total water production within the effective period of oxygen content control is determined. Based on the total water production and the moisture permeability of the packaging, determine the amount of humidity control validity period loss caused by deoxygenated water production within the oxygen content control validity period. The validity period of the humidity control is corrected based on the amount of loss during the validity period of the humidity control.

5. The method according to claim 4, characterized in that, The determination of the total water production within the effective period of oxygen content control, based on the theoretical water production corresponding to the amount of deoxygenating agent used and the exponential saturation term regarding the effective period of oxygen content control, includes: According to the formula Determine the total water production during the effective period of oxygen content control. ; in, For the first The effective period of oxygen content control after the next iteration This refers to the dosage of oxygen scavenger. This represents the theoretical oxygen absorption capacity of the oxygen scavenger. This refers to the basic efficiency of the oxygen scavenger. This is an exponential saturation term relating to the effective period of oxygen content control. The deoxygenation reaction rate constant is The water production coefficient is the unit oxygen intake.

6. The method according to claim 1, characterized in that, The correction of the oxygen content control validity period based on the attenuation effect of the low humidity environment created by dehumidification on the oxygen removal efficiency of the deoxygenating agent includes: If the effective period of humidity control exceeds the threshold of low humidity impact time, determine the amount of oxygen content control effective period loss caused by the effective period of humidity control. The validity period of the oxygen content control is corrected based on the amount of loss during the validity period of the oxygen content control.

7. The method according to claim 6, characterized in that, The determination of the oxygen content control validity period loss caused by the humidity control validity period when the humidity control validity period exceeds the low humidity impact time threshold includes: When the effective period of humidity control exceeds the threshold of low humidity impact time, the oxygen content control effective period loss function is used. Determine the amount of oxygen content control validity period loss caused by the humidity control validity period. ; in, For the first The validity period of humidity control after the next iteration. For the first The effective period of oxygen content control after the next iteration This is the deoxygenation efficiency decay constant. The time threshold for the effect of low humidity.

8. The method according to claim 1, characterized in that, The determination of the drying low-oxygen dual-factor coupling validity period corresponding to the dosage of the oxygen scavenger and the dosage of the desiccant based on the effective period of humidity control and the effective period of oxygen content control after convergence includes: The minimum of the effective period of humidity control after convergence and the effective period of oxygen content control after convergence is determined as the effective period of the dual-factor coupling of drying and low oxygen corresponding to the amount of oxygen remover and the amount of desiccant.

9. A computer device, characterized in that, include: The computer device includes a processor, a memory, and a bus. The memory stores machine-readable instructions executable by the processor. When the computer device is running, the processor communicates with the memory via the bus. When the machine-readable instructions are executed by the processor, they perform the steps of a packaging expiration date calculation method as described in any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, performs the steps of a packaging expiration date calculation method as described in any one of claims 1 to 8.

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