Rigid Container Research Articles

Experimental analysis of extreme wave loads on a containership

Model-scale experiments were conducted to investigate the non-linearities associated with the Vertical Bending Moment (VBM) of a rigid container vessel in irregular waves. Long-duration runs ( ≃ 25 hours of data in full scale) were performed to allow the calculation of statistically meaningful extreme values of hogging and sagging on five different sea-states (from Hs = 6 m up to Hs = 17 m).The model tests are presented in detail, and sampling errors are estimated. It is found that the ratio between linear and non-linear VBM (the so-called non-linear factor) can be modeled as a function of the linear value only. For a given linear value, the non-linear correction is the same, whatever the sea state. This observation, new in the fully non-linear case, is very valuable as it opens the door to efficient design assessment methodologies such as increased design sea state or design waves.

Cryopreserving CAR-T cells in a novel rigid container maintains their phenotype and function compared to conventional cryobags and cryovials

Cryopreserving CAR-T cells in a novel rigid container maintains their phenotype and function compared to conventional cryobags and cryovials

Equivalent analytical model for liquid sloshing in a 2-D rectangular container with multiple vertical baffles by subdomain partition approach

An equivalent analytical model of sloshing in a two-dimensional (2-D) rigid rectangular container equipped with multiple vertical baffles is presented. Firstly, according to the subdomain partition approach, the total liquid domain is partitioned into subdomains with the pure interface and boundary conditions. The separation of variables is utilized to achieve the velocity potential for subdomains. Then, sloshing characteristics are solved according to continuity and free surface conditions. According to the mode orthogonality of sloshing, the governing motion equation for sloshing under horizontal excitation is given by introducing generalized time coordinates. Besides, by producing the same hydrodynamic shear and overturning moment as those from the original container-liquid-baffle system, a mass-spring analytical model of the continuous liquid sloshing is established. The equivalent masses and corresponding locations are presented in the model. The feasibility of the present approach is verified by conducting comparative investigations. Finally, by utilizing normalized equivalent model parameters, the sloshing behaviors of the baffled container are investigated regarding baffle positions and heights as well as the liquid height, respectively.

Shaking a container full of perfect liquid; a tractable case, a torus shell, exhibits a virtual wall

Manipulation (‘shaking’) of a rigid container filled with incompressible liquid starting from stationary generally results in some displacement, or mixing, of the liquid within it. If the liquid also has zero viscosity, a ‘perfect’ or ‘Euler’ liquid, Kelvin’s theorems dramatically simplify the flow analysis. Response is instantaneous; stop the container and all liquid motion stops. In fact an arbitrary manipulation can be considered as alternating infinitesimal translations and rotations of the container. Relative to the container, the liquid is stationary during every translation. Infinitesimal rotations (an infinitesimal vector along the rotation axis) resolve into three orthogonal components in the container frame. Each generates its own infinitesimal liquid displacement vector field. Their combined consequences are usually obscure. Rather than a volume flow, a surface flow in 3D is considerably easier, the liquid slipping freely in a shell, sandwiched between two nested closed surfaces with constant infinitesimal gap. The closedness avoids extra boundaries. The two dimensionality admits a scalar streamfunction determined by the container angular velocity vector. Manipulation of the container angular velocity at will, usually leads to an infinitely rich variety of area preserving re-configurations of the liquid. In particular, any chosen point of the liquid can be moved, in the shell container frame, to any other chosen point. However, for a torus (shell) with a small enough hole (diameter < 0.195 torus diameter), there exists a virtual wall, a hypothetical axial cylinder intersecting the torus. No matter how the torus is manipulated, liquid inside the cylinder stays inside; outside stays outside. The analysis, solving for the streamfunction, is based on the relative vorticity, and the conformal mapping of a torus to a (periodic) rectangle, which lead to a fairly simple convolution integral formula for the flow.

Development of dynamic centrifuge models for measurement and visualization of deformation mechanisms in liquefiable soils

Recent advancements in geotechnical physical modeling have enabled visualization and analysis of deformation mechanisms in soil sections through the integration of Particle Image Velocimetry (PIV) in dynamic centrifuge modeling. PIV requires a rigid wall container. In this paper, we summarize the design considerations that enable reliable measurement and visualization of soil deformation mechanisms at the University of Colorado (CU) Boulder’s 400 g-ton, 5.5 m radius centrifuge facility. The primary objective of this system is to investigate the response of complex and stratigraphically variable, saturated granular soil deposits beneath shallow-founded structures, though it can also be used for other configurations that benefit from advanced visualization in the centrifuge. The setup aims to enable quantification and visualization of different deformation mechanisms, including shear, volumetric, and soil ejecta formation, near and away from structures. The paper provides detailed design considerations for the system components, including a rigid container with a transparent Perspex wall and duct seal inclusions, a linear-elastic single-degree of freedom (SDOF) structure, soil texture, a potential ground improvement technique, and a high-speed camera system. Through fully-coupled, three-dimensional (3D) nonlinear finite element analyses, we investigate the influence of container type, domain size, and duct seal geometry on boundary effects, with consideration of nonlinearities within various soil profile configurations with and without the presence of a building model. The findings highlight the critical impact of proximity to lateral boundaries of the container on accelerations, excess pore pressures, foundation settlement, tilt, and shear strains, as well as the benefits of duct seal in reducing those boundary effects. The results also show that the extent of boundary effects on key performance measures depends on the properties of the container, soil layers, and ground motion. The simulations also show that surface ejecta potential within stratigraphic soil profiles is highly sensitive to the depth of the groundwater table and variations in soil permeability, which must be considered in designing experimental programs that investigate the development of soil ejecta.

Enhancing the Microneurosurgical Training: Development of the Folded Placenta Model for Simulation of the Deep Operative Field Challenges of Cranial Procedures

Neurosurgery relies heavily on advanced manual skills, necessitating effective training models for skill development. While various models have been utilized, the human placenta has emerged as a promising candidate for microneurosurgical training due to its anatomical similarities with cerebral vasculature. However, existing placenta models have primarily focused on simulating superficial procedures, often neglecting the complexities encountered in deep operative fields during cranial surgeries. This study obtained ethical approval and implemented a modified placenta model to address the limitations of existing training models. The key modification involved folding the placenta and placing it within a rigid container, closely mimicking the structural challenges of cranial procedures. The placenta preparation followed a standardized protocol, including the use of specialized equipment for documentation. The primary feature of the modified model is the folded placenta within the rigid container, which replicates cranial anatomy. This innovative approach enables trainees to engage in a comprehensive range of microsurgical exercises, encompassing vessel dissection, aneurysm clipping, tumor resection, and more. The model successfully mirrors the complexities of real cranial procedures, providing a realistic training experience. The presented modified placenta model serves as an effective tool for simulating the conditions encountered in deep cranial surgeries. By accurately replicating the challenges of deep operative fields, the model significantly enhances the training of neurosurgical residents. It successfully prepares trainees to navigate the intricacies and difficulties inherent in real cranial surgeries, thus contributing to improved surgical skills and readiness for neurosurgical practice.

Technical and Economic Efficiency of Using Multifunctional Containers in Primary Seed Production of Grain Crops

Introduction. A very common technology of pedigree seed production is associated with manual in-process transshipment of many sacks that over time results in damaged sacks and in worsening of grain storage conditions. In this regard, there is a need to design a multifunctional rigid container, which will provide cost-effective storage of seed grain through the airtightness and control of the indoor environment. Aim of the Study. The study is aimed at designing a multifunctional container for primary seed production of grain crops with justification according to the criteria of technical and economic efficiency in comparison with pallet spaces and sacks. Materials and Methods. The state standard for economic evaluation of agricultural machinery was applied to assess the impact of reducing in-process transshipment of many sacks and seed losses in primary seed production of grain crops. Wheat seeds were used as the seed-producing crop under study. As service equipment there were used Wintersteiger Delta plot combine with a cutterbar working width of 2 m, seed bagging system or grain hopper 1.5 m3, Belarus 622 tractor with 1PTS-2 semi-trailer, TOR CD1 10916 electric telpher, and convective grain drying units on the basis of SL-0.3x 2 tray dryer for grain. Results. The authors of the article have estimated the technical and economic efficiency of using sacks and multifunctional containers in technological operations of harvesting, transporting and drying grain. With the annual notional volume of work in 400.7 tons, the saving of total money costs for a plot seed combine-harvester averages 117.9 thousand rubles. The reduction in the cost of work performance is 32.8%, payback period is 2 years; the decrease in the need for service personnel and harvesters is not revealed. At the same time, the reduction in the need for energy sources is 32.3%. Discussion and Conclusion. It has been determined that during technological operations of harvesting, transporting and drying, the best seed production performance is when using the multifunctional container with the following indicators of specific cargo turnover, p: Ui = 800 t/km2; Lг = 0.15 km; b = 0.01 km; Lп‒т = 0.5 km, initial humidity of seeds is 21%. In the process of using this container, the production cost, need for service personnel, energy sources and machinery are reduced.

Numerical framework for anaerobic digestion and/or composting of bioplastics and organic waste performance evaluation under real-like large scale operating conditions

Bioplastics are newly designed and developed plastic materials to meet the criteria of sustainability and sustainable development that present the following characteristics: biobased, biodegradable or both properties. They include a whole family of materials with different properties and applications. Bioplastics certified as biodegradable and/or compostable, according to the regulatory plan of Italy and other countries around the world, must be collected with organic waste and follow the same end-of-life path, i.e., organic recycling processes in anaerobic digestion and/or industrial composting plants. However, it should be noted that they are certified according to tests carried out under standardized optimal degradation conditions, that is, conditions that are not always the same as those found in the operation of anaerobic digestion and composting plants. Improper management of these materials can become an increasing problem as their continued widespread use will require large volumes of these materials to be treated in facilities that are not designed to biodegrade bioplastics, resulting in potential contamination of large volumes of undegraded bioplastics in digestate and/or compost produced in the treatment of conventional organic waste. The purpose of this work is to investigate the degradation of the most popular bioplastics currently collected with organic waste through separate collection under the actual operating conditions of waste recycling plants operating through biodegradation processes. Specifically, using both studies conducted at the laboratory scale and evidence of biodegradation plant configuration and operation at the real scale, the Aspen Pus V12 program was used to model and simulate an anaerobic digestion process integrated with a composting process. This evaluated the level of biodegradation, expressed as a percentage of degraded mass, as a function of the implemented process conditions such as temperature and hydraulic residence time (HRT). The bioplastics that have been focused on, certified as compostable, are PLA (rigid disposable containers: cups) and starch-based shopping bags (SBS). The results achieved show that through an anaerobic digestion process alone, after 28 days in thermophilic conditions, PLA can degrade by 42%, and SBS by 44%.The integrated anaerobic/aerobic process provides a biodegradation performance allows 85% and 56% for SBS and PLA, respectively, in case the biopolymers are subjected to 28 days of thermophilic anaerobic digestion and 90 days of composting.

Biopolymer-based edible packaging: a critical review on the biomaterials, formation, and applications on food products

Food substances are highly susceptible to spoilage due to their inherent properties and environmental factors during transit from farm to fork. Hence, it is necessary to protect the food from various factors by safeguarding it in proper packaging. The packaging materials include flexible pouches and rigid containers, and they have their own merits and demerits. Most of the packaging materials used nowadays are polymer-based, which takes a long time to degrade and poses a dangerous threat to terrestrial and aquatic life. Edible packaging evolved to be an alternative to conventional packaging due to its natural biopolymers, which are hyper-degradable and consumable. They exhibit improved barrier and organoleptic properties, mass transfer selectivity, and reduced migration properties of packaging ingredients into food and environmental pollution. They are classified as coatings, films, and pouches and can be used as either food wraps or heat-sealed into pouches that are applied directly on the food surface. Thus, edible packaging is a potential approach in the food packaging industry. This review explains in detail the biomaterials used for film preparation, various processes involved in film formation, different coating methods, and recent applications in the area of eco-friendly edible packaging.

Citrus waste fibres for natural cosmetic and bioplastic packaging

In this work new biocomposite materials from wasted citrus peels has been validated for a value-added packaging and novel cosmetic products. Specifically, extracted natural fibres and dehydrated pulp from citrus fruit were combined with polylactic acid and other additives as materials for the production of bio-based packaging jars and cosmetic products. For the composition of the packaging an orange powder (dehydrated wastes) was found to be the best performing, while orange comminute, which results from milling the orange peel, was most suitable for composition of the cosmetic formulations. Polylactic acid was compounded with citrus fibres by up to 25 wt.% by twin screw extrusion and processed via injection moulding, one of the most widespread processing technologies for producing rigid packaging containers. Composites were characterized, defining their mechanical, morphological and thermal properties. Validation of packaging thermostability performance was performed by Heat deflection temperature in compliance to ISO75 and VICAT softening temperature in accordance with ISO306. Compatibility tests of packaging demonstrators with newly formulated cosmetic products has been investigated as well. An accelerated compatibility test of the cosmetic jars with water and oil-based simulants was performed at ambient temperature, -5 °C, and at 45 °C. The results indicated that new cosmetic packaging are not consistent with water-based cosmetic formulations but are compatible with products based on natural oils. While the price of these products is generally higher than those using conventional plastics, they are competitive for premium cosmetic brands.

Modulation of redox reactivity of resazurin through host-guest complexation with Cucurbit[n]uril (n = 7, 8).

Resazurin (Alamar Blue, RZ) is a widely utilized fluorescent probe for biological sensing, whose fluorescent intensity can be modulated by changing its redox states; thereby, electrochemical reactivity of RZ is of significance when designing a sensing assay. Herein, we report novel two-way electrochemical reactivity modulation of RZ using host-guest complexation with rigid molecular containers cucurbit[n]uril (CBn, n = 7, 8). The complexation between CBn and RZ is confirmed by 1H NMR measurements and supported by computational simulation, and the binding constants are determined via UV-vis titration. Notably, the voltametric data highlights that the redox reactivity of RZ can be activated or deactivated upon encapsulation by CB8 or CB7, respectively. This two-way reactivity modulation is hypothesized to be mediated by the difference in cavity volume that favors or hinders the approach of water molecules to the encapsulated reaction center during the reduction process. Despite the similar cavity size to CB, molecular containers such as cyclodextrins (CDs) exhibit considerably weaker modulation effects. Our approach can potentially be applied to other redox processes that involve proton transfer, and open new possibilities in supramolecular electrochemistry.

Typha domingensis and Phragmites australis as alternative and sustainable pulp materials for primary paper based packaging

Environmental pollution with plastic waste and deforestation has led to increase research into the development of new natural fibers. Typha domingensis and Phragmites australis was used to make sustainable paper sheet and rigid containers packaging. Characterization of structural, mechanical, barriers, safety and end-of-life properties of Typha paper coated with polyolefins or polylactic acid was performed. Cellulose extraction was done at, 10 % NaOH at 120 °C for 90 min, the cellulose and fibers of these plants were used to produce a paper sheet and trays. The results showed that sheets made from Typha were 100 % recyclable and, showed mechanical properties comparable (5900 MPa) to a commercial Mitsubishi paper (7000 MPa) at parity of grammage. Typha and Reeds trays were permeable to water vapors and oxygen, but resistant to fat. The results LCA analysis showed that Typha trays had an environmental impact three times lower than aluminum trays, the most use in Senegal.

A Time Domain Nonlinear Fluid–Structure–Soil Interaction Analysis of Rectangular Water Storage Tanks Using Coupled Eulerian–Lagrangian (CEL) Formulation and Direct Method

ABSTRACT Generally, soil–structure interaction (SSI) effects significantly impact the dynamic behavior of fluid storage containers. Hence, ignoring the SSI may result in unrealistic fallouts. This research employs fully coupled numerical modeling to examine this effect on the dynamic behavior of rectangular incompletely filled rigid water storage containers under earthquake excitation. The tanks’ performance is analysed using the coupled Eulerian–Lagrangian (CEL) technique of the Finite Element Method (FEM). The fluid–structure interaction (FSI) behavior of the tanks is studied using the CEL approach, which is formulated in a nonlinear wave theory. The direct procedure using the infinite element is exerted to model soil field, reflect the effects of base flexibility on the tanks’ performance, and investigate SSI influences on tanks’ seismic performance. The impact of base flexibility on the system’s dynamic behavior is studied by paralleling the outcomes of six soil media. The conclusions are provided as surface sloshing heights and the development of maximum compressive stresses obtained from six earthquake excitations for the two aspect ratios and various base statuses. The sloshing response seems to be linked to the tank’s geometrical parameters and earthquake characteristics and is practically independent of differences in the base type. From these analyses, it may be concluded that the SSI influences on impulsive response are dissimilar in broad and tall structures because of the ability of shallow tanks to dissipate more energy through radiation damping rather than tall tanks. Moreover, for the case of medium containers, notable attention would be required to be dedicated to the design of flexible foundations expected to experience near-field earthquake shakings.

Loading-unloading of spherical and cylindrical cavities in cohesive-frictional materials with arbitrary radially symmetric boundary conditions

Many scenarios in geotechnical engineering involve cavity unloading from a loaded state under different boundary conditions, especially for thick-walled cylinder tests in laboratory conditions. A novel analytical cavity expansion-contraction solution is proposed for modeling thick-walled cylinder tests during a complete loading-unloading process under arbitrary symmetric boundary conditions. The proposed solution has potential implication in investigating ambiguous boundary effects for problems involving cavity expansion-contraction. The mechanical model considers two concentric layers of materials around the cavity, where the inner layer is considered as cohesive-frictional and the circumambient infinite layer is assumed as elastic to simulate the arbitrary radially symmetric boundary condition, including two extreme scenarios with constant-pressure and zero-displacement boundaries. The derived solution provides the evolutions of cavity pressure and distributions of stresses and displacements in both layers during the loading-unloading process, which is then rigorously validated against finite element results. The effects of boundary conditions and size of the cohesive-frictional layer have been comprehensively investigated by analyzing the cavity pressure and the developments of plastic zones during expansion and contraction. The developed solution has been proved to be applicable in geotechnical engineering, with comparisons between analytical results and experimental data for pressuremeter tests in calibration chambers and pile installation tests in a rigid container. The proposed solution might also be helpful in the analysis of autofrettaged pressure vessels.

Effects of container type and size on thermal processing characteristics and B-vitamin retention of canned cat food.

Rigid cans were the traditional container for canned cat foods, but semi-rigid trays/tubs and flexible pouches are popular options as well. Despite this, little is published on the effects of canned cat food container characteristics on thermal processing and retention of B-vitamins. Therefore, the objective was to evaluate the effects of container size and type on thermal processing and B-vitamin retention. Treatments were arranged in a factorial with two container sizes [small (85-99 g) and medium (156-198 g)] and three container types (flexible, semi-rigid, and rigid). A canned cat food formula was prepared, filled, and sealed into containers before retort processing to a heating cycle target lethality of 8 min. Internal retort and container temperatures were used to calculate accumulated lethality. Thiamin, riboflavin, niacin, pantothenic acid, pyridoxine, biotin, folic acid, cobalamin, and moisture contents were analyzed in pre- and post-retort samples by commercial laboratories. Thermal processing metrics were analyzed (SAS v. 9.4; SAS Institute, Cary, NC) with the fixed effects of container size, container type, and their interaction. Dry matter basis B-vitamin contents were analyzed with container size, container type, processing stage, and all two-way and three-way interactions as fixed effects. Means were separated using Fisher's LSD at a P-value < 0.05. Total accumulated lethality was greater (P < 0.05) for semi-rigid and flexible containers (average 14.99 min) than for rigid containers (12.86 min). The greater processing of semi-rigid and flexible containers was likely influenced by required retort settings. Thiamin and riboflavin contents decreased (P < 0.05) by 30.4 and 18.3%, respectively, due to retort processing. Niacin, biotin, and cobalamin were not affected (P > 0.05) by processing. Processing increased (P < 0.05) pantothenic acid (9.1%), pyridoxine (22.6%), and folic acid (22.6%). This was likely caused by sampling or analytical variation. No interaction involving processing stage was significant for any B-vitamin (P > 0.05). B-vitamin retention was not influenced by differences in thermal processing caused by the packaging treatments. Thiamin and riboflavin were the only B-vitamins meaningfully impacted by processing and retention was not improved by any container characteristic.

A fast semi-analytic solution of liquid sloshing in a 2-D tank with dual elastic vertical baffles and walls

Liquid sloshing characteristics in a lateral excited two-dimensional (2-D) rectangular tank with dual elastic vertical baffles and walls have been investigated analytically. The elastic baffle or wall is regarded as an Eulerian Bernoulli beam. The complex liquid domain divides into six simple sub-domains according to the superposition principle. The formal solution of the potential function in each sub-domain is obtained using the separation of variables method. Then the formal baffle or wall deflection solution can be derived from the transverse vibration equation. The Eigen equation can be established according to the free surface, interface, and coupled vibration conditions. The coupled frequency can be obtained by solving the Eigen equation. The velocity potential under lateral excitation consists of the rigid container velocity potential and the disturbance potential. Then the coupled dynamic response equation is established using the free liquid surface equation and the coupled vibration equation. The correctness of the semi-analytic solution is verified against available data. Therefore, the numerical model of the present work can be computed quickly with semi-analytic solution and obtain the mechanism of liquid-structure interaction. Finally, the effect of baffle parameters and excitation frequency on liquid sloshing is discussed in detail.

SG-APSIC1130: Zero wet pack Pimporn Sirikraiwattanawong, Thailand

Objectives: We noted moisture in Thompson retractor sets after steam sterilization in our hospital. Moisture can cause severe problems leading to potentially contaminated instruments that carry infection risk to patients and cause procedure delays, wasted time and effort, greater workload, and higher costs. We sought to reduce the number of retractor sets with moisture to zero. Methods: The central sterile supply (CSS) team discussed the cause of the problem. We hypothesized that temperature difference between the sterilizer chamber and inside the container might create condensation and thus moisture in the final surgical set. We collected and analyzed data and proposed an experiment to improve the sterilization process. We performed a trial of sterilization process improvements pertaining to proper loading technique and the packaging process. We also evaluated the appropriate drying time for rigid containers. We then rearranged the process and adjusted the cooling time from 30 to 60 minutes after steaming. Results: Moisture in Thompson retractor packs occurred because of thicker, rigid containers. We removed the previous type of lining material to separately steam the rigid surgical instrument, and we extended the cooling time to 60 minutes. We updated standard operation procedures and continued to monitor and re-evaluate the process. Conclusions: We identified the primary cause of moisture in Thompson retractor sets after steam sterilization. We illustrated that avoiding sterilizer overload, avoiding contact with fabric wrapping materials, and proper cooling time kept the pack moisture free. Occurrences of moisture in surgical packs after sterilization should be reported and handled efficiently by CSS personnel to preserve quality and avoid waste.

Identification of the viscoelastic properties of a hydrogel in sol–gel transition by vibration experiments

Soft viscoelastic materials, such as hydrogels, are widely used by biomedical and agri-food industries. The characterization of their transition from solution (liquid) to gel (solid) state is often necessary for manufacturing processes and quality control. This study aims at characterizing the viscoelastic properties of a hydrogel in sol–gel transition by measuring the vibration response of the bottom silicone membrane of a rigid circular cylindrical container subjected to base excitation. The static deflection of the membrane for increasing sample filling height was measured. The frequency-responses of the membrane alone and of the membrane coupled to a hydrogel during sol–gel transition were measured for increasing filling heights. A finite-element numerical model was built for the identification of the storage shear modulus and loss tangent of the hydrogel. Both a slip and a no-slip conditions of the hydrogel at the inner wall of the container were applied and their effects were compared. The static deflection was calculated and compared to the experiments. The parameters of a dynamic model of the coupled membrane–hydrogel were identified. The evolution of the identified material parameters enables to follow the sol–gel transition of the hydrogel. Results show that the membrane vibration can be used to characterize the viscoelastic mechanical properties of a hydrogel in sol–gel transition through a more versatile approach.

Sloshing mitigation using vertical cylindrical baffle

This study has looked into the phenomenon of liquid vibrations in a rigid cylindrical container. The impacts of rigid vertical baffle positioned in the container on frequencies have been examined. The container is partially filled with an impermeable and non-viscous fluid. ANSYS software is used to report the mode shapes of the baffle and fluid domain.

Functional Polymer and Packaging Technology for Bakery Products.

Polymeric materials including plastic and paper are commonly used as packaging for bakery products. The incorporation of active substances produces functional polymers that can effectively retain the quality and safety of packaged products. Polymeric materials can be used to produce a variety of package forms such as film, tray, pouch, rigid container and multilayer film. This review summarizes recent findings and developments of functional polymeric packaging for bakery products. Functional polymerics are mainly produced by the incorporation of non-volatile and volatile active substances that effectively retain the quality of packaged bakery products. Antimicrobial agents (either synthetic or natural substances) have been intensively investigated, whereas advances in coating technology with functional materials either as edible coatings or non-edible coatings have also preserved the quality of packaged bakery products. Recent patents demonstrate novel structural packaging designs combined with active functions to extend the shelf life of bakery products. Other forms of active packaging technology for bakery products include oxygen absorbers and ethanol emitters. The latest research progress of functional polymeric packaging for bakery products, which provides important reference value for reducing the waste and improving the quality of packaged products, is demonstrated. Moreover, the review systematically analyzed the spoilage factors of baked products from physicochemical, chemical and microbiological perspectives. Functional packaging using polymeric materials can be used to preserve the quality of packaged bakery products.