I. Introduction
In the modern food packaging industry, trays are a core tool for carrying and protecting food. The choice of material directly impacts food safety, transportation efficiency, and environmental sustainability. With increasing global environmental awareness and the implementation of plastic reduction policies, disposable plastic food trays and paper trays, as mainstream options, each has its advantages and disadvantages, becoming important considerations for food companies.
Disposable plastic food trays are made from high-density polyethylene (HDPE), polypropylene (PP), polystyrene (PS), or polyethylene terephthalate (PET), and are formed through injection molding, thermoforming, or blow molding processes. They are lightweight, strong, corrosion-resistant, and reusable, and are widely used in the food packaging field. However, they rely on petrochemical raw materials and are difficult to degrade after use, causing long-term environmental pressure.
Paper trays are mainly made from pulp and cardboard (including recycled paper and virgin pulp paper), and are manufactured through molding and bonding processes. Their raw materials are widely available and renewable, and they have outstanding environmental performance, leading to increasing applications in e-commerce, express delivery, and light product transportation. However, their load-bearing capacity and moisture resistance have significant limitations.
This report provides a comprehensive comparison of the two types of trays from four core dimensions: cost-effectiveness, environmental impact, durability, and hygiene and safety, providing decision-making references for food companies.
II. Cost-Effectiveness Comparison Analysis
2.1 Procurement Cost Comparison
The procurement costs of paper trays and plastic food trays differ significantly. According to market research, the unit price of paper trays ranges from $0.01 to $0.35 per unit, depending on specifications, materials, and purchase volume: for example, sugarcane bagasse biodegradable food packaging containers cost $0.05-$0.15 per unit, and customized large cardboard gift basket trays cost $0.06-$0.35 per unit. Domestic bulk purchase prices can be controlled at 0.35-0.5 RMB per unit.
Disposable plastic food trays have higher procurement costs, with a unit price of $0.05-0.20 per piece: PP material microwaveable partitioned hot food trays cost $0.09-0.20 per piece, custom frozen food trays cost $0.05-0.09 per piece, and the price of standard domestic plastic food trays is mostly between 20-50 RMB per piece, depending on the material, specifications, and manufacturing process.
In the initial procurement stage, the unit price of paper trays is usually 30%-50% lower than that of plastic food trays, but the price difference narrows with increased purchase volume: when the purchase volume exceeds 10,000 units, the unit price of plastic food trays can be reduced to $0.028-0.038 per piece, significantly reducing the gap with paper trays.
2.2 Long-Term Use Cost Analysis
Service life: Paper trays can only be used once or recycled no more than 5 times; plastic food trays generally last 3-5 years, high-quality products can last 5-10 years.- Damage rate: Paper trays annual damage rate 15%-25% (over 30% in humid environments); plastic food trays only 3%-5%.
- Maintenance costs: Paper trays need frequent replacement; plastic food trays only require regular cleaning and disinfection.
- Transportation costs: Paper trays are lighter but bulky with poor moisture resistance; plastic trays have stable transport performance.
- Recycling costs: Paper trays low recycling value (0.5-1 RMB/kg); plastic trays higher value (2-3 RMB/kg) but a complex recycling process.
2.3 Comprehensive Cost-Benefit Assessment
From a usage perspective, paper trays are suitable for single-use applications (takeaway packaging, exhibition sample display), light cargo transportation (weight < 500kg), cost-sensitive scenarios with low usage frequency, and export trade scenarios with high environmental requirements; plastic food trays are suitable for frequent turnover in warehousing and logistics, heavy cargo transportation (weight > 1 ton), harsh environments (humidity, chemical corrosion), and long-term storage.
From a scale perspective, the cost advantage of plastic food trays becomes more apparent when a company's tray usage reaches a certain scale. Taking an annual usage of 10,000 trays as an example: paper trays have a unit price of 0.5 yuan and a lifespan of one use, resulting in an annual cost of 5,000 yuan; plastic food trays have a unit price of 25 yuan and a lifespan of 5 years, resulting in the same annual cost of 5,000 yuan (25 × 10000 ÷ 5). Furthermore, plastic food trays have a lower damage rate and lower maintenance costs, so the actual total annual cost can be reduced by 20%-30%.
It should be noted that tightening environmental policies and fluctuations in raw material prices are changing the cost difference between the two: some regions impose environmental taxes on plastic packaging and provide tax incentives for paper packaging, expanding the cost advantage of paper trays; new materials such as bio-based plastic food trays also provide new directions for cost optimization.
III. Environmental Performance Comparison Analysis
3.1 Environmental Impact of Production Process
Paper tray production is more environmentally friendly, mainly in three aspects: firstly, the raw materials are sustainable, using renewable resources such as waste paper pulp, fast-growing forest fibers, and sugarcane bagasse, which can be recycled; secondly, it has low energy consumption and low carbon emissions, with energy consumption only 1/4 of that of plastic, and carbon emissions reduced by more than 30%. For example, producing 1 ton of paper pulp emits 1-2 tons of CO₂, while producing 1 ton of polyethylene emits 2-3 tons of CO₂; thirdly, the process is relatively clean, with many chemical agents used in pulp production being recyclable, and the final product is completely biodegradable. However, some paper trays are coated with PE film or chemical coatings to improve moisture resistance, which increases the environmental burden; using virgin wood pulp also impacts forest resources.
The environmental impact of plastic tray production is concentrated in: reliance on petrochemical raw materials (producing one standard plastic tray requires 2.3 kg of petroleum-based raw materials), exacerbating energy consumption; production requires high temperature and pressure, resulting in high energy consumption; the use of a large number of chemical catalysts and additives may harm the environment and human health; and the treatment of generated waste gas and wastewater is costly.
In recent years, bio-based plastic food trays have become a new direction for improving the environmental performance of plastic food trays. They are made from renewable resources such as corn starch and sugarcane bagasse, reducing carbon emissions by 60% compared to petroleum-based plastics, and are naturally biodegradable within 90 days.
3.2 Comparison of Recycling Performance
Paper trays have significant recycling advantages: mature recycling technology (collection, crushing, pulping, purification, and remolding), low cost (approximately 0.3 yuan/kg), and complete biodegradability (decomposing into organic matter within 30 days in the natural environment, without plastic microparticle pollution), conforming to the circular economy. One book publishing company has a paper tray recycling rate of 95%.
However, paper tray recycling also faces challenges: the recycling value is significantly reduced after contamination by oil stains and chemicals; paper fibers become shorter and weaker after multiple recycling cycles, usually only allowing for 3-5 recycling cycles; and the paper product recycling system is incomplete in some areas, affecting recycling efficiency.
Plastic tray recycling is more complex: theoretically, materials such as HDPE and PP can be 100% recycled, with a performance retention rate of over 85%; however, the actual recycling rate is low. A survey by the China Materials Recycling Association shows that the nationwide large-scale recycling rate of plastic food containers is only 3%, mainly due to an incomplete recycling system, outdated classification technology, and high costs; recycling technology requirements are high, requiring multi-sensor configurations to identify polymer types, colors, etc., to improve purity to over 99%; the recycling value is relatively high (2-3 yuan/kg for clean plastic food trays), but the recycling cost accounts for approximately 60% of the cost of new materials.
From the perspective of ease of recycling and processing, paper trays have a greater advantage, requiring no complex separation technology and being completely biodegradable; plastic tray recycling requires specialized equipment, and complex materials such as multi-layer composite structures are more difficult to effectively separate.
3.3 Comprehensive Environmental Impact Assessment
From a life cycle assessment (LCA) perspective, paper trays offer significant advantages in terms of carbon emissions: Metsä Group research shows that even excluding the benefits of cardboard recycling, the climate impact of cardboard takeaway trays is still lower than that of pure PP trays; Billerud's research confirms that packaging trays made from FibreForm material reduce global warming impact by 71% compared to pure plastic food trays. However, plastic food trays using recycled PET materials may have lower carbon emissions than paper trays made from virgin materials, demonstrating the crucial importance of raw material sources in environmental assessments.
From a resource consumption perspective, paper trays have the advantages of renewable raw materials, low energy consumption, and biodegradability; plastic food trays have the disadvantages of relying on fossil resources, long degradation cycles (hundreds of years), potential microplastic pollution, and low actual recycling rates (most are landfilled or incinerated).
Technological advancements and environmental requirements are changing the environmental impact of both: paper trays can further reduce their environmental impact by using FSC-certified wood, optimizing processes, reducing chemical additives, and using bio-based moisture-proof coatings; plastic food trays can significantly improve their environmental performance through the use of bio-based and biodegradable plastics (such as corn starch-based trays that degrade within 90 days while maintaining 85% of the performance of traditional plastics), and by improving recycling technologies and perfecting recycling systems.
At the policy level, plastic restriction policies are becoming stricter in various countries: the EU's Circular Economy Action Plan requires a 70% recycling rate for plastic food trays by 2030; China has also introduced a series of plastic restriction policies to limit the use of single-use plastic products, which will further promote the application of environmentally friendly materials such as paper trays.
IV. Durability Performance Comparison and Analysis
4.1 Load-Bearing Capacity Comparison
Plastic food trays have a stronger load-bearing capacity, thanks to their material properties and structural design. According to industry standards, injection-molded plastic food trays have a dynamic load capacity of 1.5-2 tons and a static load capacity of 4-6 tons. The load-bearing capacity varies for different types: lightweight trays (e-commerce warehousing, small goods turnover) have a static load capacity of 500-1000 kg and a dynamic stacking load capacity of 200-500 kg; medium-duty trays (food and beverage, daily necessities warehousing) have a static load capacity of 1500-2000 kg and a dynamic load capacity of 800-1200 kg; heavy-duty trays (industrial raw materials, machinery and equipment transportation) have a static load capacity exceeding 3000 kg and a dynamic load capacity of 1500-2000 kg.
Specially designed plastic food trays have even higher load-bearing capacity: blow-molded trays with a honeycomb internal support structure have a standard dynamic load capacity of 2 tons and a static load capacity of 6 tons; steel-reinforced, grid-designed plastic food trays can carry heavy components such as car engines and transmissions.
Paper trays have a lower load-bearing capacity, typically 0.5-1 ton for dynamic load and 1-2 tons for static load, due to the physical properties of paper materials which are prone to deformation and breakage under heavy pressure. However, technological innovations have improved the load-bearing capacity of some paper trays: honeycomb cardboard structure paper trays, through corrugated design, can bear 500-1000 kg/m²; specially designed paper trays can even withstand over 4500 kg (10000 pounds) of weight, approaching the level of traditional wooden trays.
In practical applications, the difference in load-bearing capacity determines the applicable scenarios: plastic food trays are suitable for carrying heavy food goods such as cases of beverages, canned foods, and frozen foods; paper trays are more suitable for lighter goods such as boxed foods, pastries, and fruits.
4.2 Transportation and Storage Adaptability
In terms of temperature adaptability, plastic food trays have a wide range of applications: ordinary plastic food trays can be used from -20℃ to 60℃; HDPE trays are resistant to low temperatures, maintaining stable performance and releasing no harmful substances from -40℃ to 60℃; PP trays have excellent heat resistance, withstanding high temperatures of 110-120℃, suitable for hot food packaging and microwave heating; ultra-low temperature impact-resistant HDPE trays maintain more than 85% impact strength at -40℃.
Paper trays have poor temperature resistance: they easily soften and deform at high temperatures, and become brittle and easily break at low temperatures, suitable only for use in environments from 0℃ to 40℃.
In terms of humidity adaptability, plastic food trays have significant advantages: HDPE, PP, and other materials have extremely low water absorption rates (<0.03%), and their one-piece molded surface is smooth and seamless, effectively blocking moisture and resisting acid, alkali, and other chemical corrosion, making them suitable for cold chain logistics and humid environments.
Paper trays have poor moisture resistance: paper itself is highly hygroscopic, increasing in weight and decreasing in strength in humid environments, and easily cracking and deforming under heavy loads. Although some paper trays are coated with a moisture-proof coating or PE film (e.g., reducing the damage rate from 25% to 5% in rainy areas), their moisture resistance is still inferior to plastic food trays.
In terms of mechanical properties, plastic food trays have strong impact resistance, stable structure (one-piece molding with no welding points or gaps), and a long service life (3-5 years or even longer), able to withstand stacking pressure, forklift loading and unloading, and handling impacts; paper trays are easily damaged by moisture, have weak impact resistance, a short service life (several months to one year), and a limited number of reuses (no more than 5 times), making them difficult to cope with complex mechanical stress.
| Performance Index | Plastic Food Trays | Paper Trays |
|---|---|---|
| Temperature Adaptability | -40℃ to 120℃ (HDPE/PP variants) | 0℃ to 40℃ (easily brittle/soften) |
| Moisture Resistance | Excellent (water absorption <0.03%) | Poor (high hygroscopy, strength loss) |
| Impact Resistance | Strong, seamless one-piece molding | Weak, easy to crack/break |
4.3 Service Life and Damage Rate Analysis
In terms of service life, plastic food trays are significantly longer: generally 3-5 years, and high-quality products 5-10 years; however, the service life varies in different scenarios. In agricultural scenarios (scratches, stacking deformation), the service life is reduced to 2 years, in aquatic product scenarios (dirt accumulation, corrosion), 1.8 years, and in wholesale markets (high-frequency turnover), the service life is shortened due to a 15% damage rate. Paper trays have a short lifespan: most are for single use, with a maximum of 5 cycles of reuse, and typically last only a few months to a year under normal use.
In terms of damage rate, plastic food trays have a low damage rate: the annual damage rate under normal use is 3%-5%, and in a 3-month comparative experiment by a logistics company, the damage rate was only 2% (compared to 18% for wooden trays). The annual damage rate of 10,000 folding trays in an e-commerce warehouse was less than 0.2%.
Paper trays have a high damage rate: the annual damage rate under normal transportation is 15%-25%, and over 30% in humid environments; in rainy areas, the damage rate is 25% without moisture-proof treatment, and drops to 5% after moisture-proof treatment.
Factors affecting tray lifespan and damage rate include: usage environment (temperature, humidity, chemical environment, cleaning frequency), usage method (stacking height, loading and unloading methods, frequency of use), material characteristics (HDPE is resistant to low temperatures, PP is resistant to high temperatures; virgin pulp is stronger than recycled pulp), and design structure (reinforcing ribs improve load-bearing capacity, anti-slip design reduces cargo sliding damage).
In summary, in most scenarios, plastic food trays perform better than paper trays in terms of lifespan and damage rate, especially in long-term use, frequent turnover, or harsh environments, where the advantages are even more pronounced.
V. Summary of Comparisons Across Dimensions
- Cost Dimension: The purchase cost of paper trays is lower (30%-50% lower), but the long-term cost of plastic food trays is better (lifespan of 3-10 years vs. a few months to 1 year for paper trays, annual damage rate of 3%-5% vs. 15%-30%); in high-frequency use scenarios, plastic food trays have a lower total life cycle cost, while paper trays have a significant cost advantage in single-use scenarios.
- Environmental Dimension: Paper trays have significant advantages (renewable raw materials, low energy consumption, low carbon emissions, biodegradable, easy recycling), while plastic food trays have prominent disadvantages (reliance on fossil resources, slow degradation, low recycling rate); however, recycled plastic or bio-based plastic can improve the environmental performance of plastic food trays.
- Durability Dimension: Plastic food trays are comprehensively superior, with advantages in load capacity (dynamic load 1.5-2 tons vs. 0.5-1 ton), environmental adaptability (temperature -40℃ to 120℃ vs. 0-40℃, completely moisture-proof vs. susceptible to moisture), lifespan (3-10 years vs. several months to 1 year), and damage rate (3%-5% vs. 15%-30%).
- Hygiene Dimension: Both have food contact safety standards. Plastic food trays are easy to clean and disinfect (multiple methods, thorough effect), and have a low risk of microbial contamination; paper trays have limited cleaning and disinfection options (dry wiping only), and a high risk of microbial contamination, making them suitable for single-use or low-hygiene-risk scenarios.
