Can Recycled Reusable Containers for Takeout Materials Be Used to Make New Products?
author: Iris
2025-11-20
I. Technical Feasibility Analysis
1.1 Basic Characteristics of Recycled PP Reusable Containers for Takeout Materials
PP (polypropylene), as a thermoplastic, theoretically possesses good recyclability. Recycled PP reusable containers for takeout materials are mainly divided into two categories: pre-consumer recycled materials (PIR) and post-consumer recycled materials (PCR).
Pre-consumer recycled materials (PIR) refer to unused waste generated during the production process, such as scraps, machine head materials, and trial materials produced during plastic product manufacturing—materials that are not contaminated. The advantages of this type of material are high purity, stable performance, and identical formulation to the original raw materials, with minimal performance differences.
Post-consumer recycled materials (PCR) refer to waste materials that have already been used by consumers, such as discarded plastic reusable containers for takeout and packaging materials. PCR materials are significantly larger in volume than PIR materials, but their composition is more complex, potentially containing impurities such as PE and other plastics, paper scraps, and metals. They also have a high melt flow index with large fluctuations. Recycling these materials is technically challenging, but they better embody environmental protection principles and have greater environmental significance and market value.
1.2 Recycling Process
The recycling process for PP food containers' recycled materials is quite mature, mainly including the following key steps:
Collection and pretreatment are the first steps, requiring the centralized collection of waste PP food containers and the removal of impurities (such as food scraps, paper, and metals). The quality of this step directly affects the purity and performance of subsequent products.
Crushing is typically performed using a dual-shaft shredder with a capacity of up to 5t/h, crushing the PP food containers into 10-15mm plastic sheets. During the crushing process, a negative pressure suction machine is used to extract and separate dust and fiber debris, while an electromagnetic separator removes iron from the particles.
The washing process is a crucial step in ensuring the quality of the recycled material. The current mainstream cleaning process includes pre-rinsing → main cleaning → rinsing → spraying, with water consumption per ton controlled to within 0.3 tons (using a three-stage water circulation system). Cleaning temperature is typically controlled between 60-90℃, and the cleaning agent uses a compound formula, including hydroxides, whitening cleaning powder, phosphoric acid compounds, and surfactants. It is particularly noteworthy that environmental regulations strictly prohibit the use of phosphorus-containing cleaning agents, and the cleaning agent recovery rate must reach over 95%.
Sorting technology has achieved significant breakthroughs in recent years. Utilizing AI-driven near-infrared (NIR) technology and hyperspectral imaging technology, precise identification and sorting of food-grade PP can be achieved, with purity reaching over 97%. Air separation systems remove light impurities, while color sorters remove discolored impurities, and finally, sedimentation separation removes impurities of different densities.
The granulation process utilizes a twin-screw extruder, with screw speed controlled at 70-110 r/min, barrel temperature at 170-220℃ (zone 1 170℃, zone 2 190℃, zone 3 220℃), and die pressure at 12-18 MPa. The energy consumption of the new equipment has been reduced from 80 kWh/ton to 55 kWh/ton, resulting in a 32% reduction in unit energy cost.
1.3 Modification Technology for Food Contact Applications
To ensure that recycled PP food container materials meet the stringent requirements for food contact applications, a series of modification treatments are necessary: Toughening modification technology is one of the most commonly used methods. By adding polyolefin elastomers (such as POE and EVA), the toughness and impact resistance of recycled PP can be significantly improved. Maleic anhydride-grafted POE (POE-g-MAH), as a compatibilizer, can form "chemical bridges" with plastic molecules, inserting flexible segments between chains and effectively improving the material's toughness.
Filler modification and reinforcement modification technologies, through the addition of materials such as calcium carbonate, talc, mica, and glass fiber, can improve the rigidity, heat resistance, and dimensional stability of recycled PP. In particular, when talc is added at a concentration of 5%, it can effectively adsorb small molecules precipitated from food containers, improving overall performance.
Supercritical CO₂ purification technology represents the most advanced purification technology currently available. This technology can efficiently remove embedded contaminants from the PP matrix, making the quality of recycled PP comparable to virgin raw materials. The PPristine™ food-grade rPP developed by the NextLooPP project utilizes this technology and has obtained 100% food-grade approval from the US FDA.
Chemical recycling technologies, such as the Reborn-PP process, through unique pretreatment and post-treatment techniques, ensure that recycled PP has high whiteness, low odor, and performance comparable to virgin raw materials. This process's self-catalyzing system achieves a yield of over 92%, reduces energy consumption by 30% compared to competitors, and meets FDA and EU food contact standards.
II. Product Quality and Performance Evaluation
2.1 Heat Resistance Analysis
PP material itself possesses excellent heat resistance, which is a key reason why it is a primary material for reusable containers for takeout. Ordinary PP has a melting point of approximately 165-167℃, a heat distortion temperature of generally 110℃, and an actual long-term temperature resistance of about 100℃. Modified PP material can increase its heat resistance temperature to 130-142℃, with a long-term thermal stability of 120-135℃, while food-grade PP material can withstand temperatures up to 140℃.
For reusable containers for takeout made from recycled PP material, their heat resistance performance is as follows: In terms of basic heat resistance, the temperature range of recycled PP reusable containers for takeout is typically -20℃ to 120℃, with some products reaching 140℃. This temperature range fully meets daily usage needs, including scenarios such as holding hot food and refrigerated storage.
Microwave oven compatibility is an important performance indicator for reusable containers for takeout. According to US FDA certification, food containers made of 100% recycled PP (rPP) can be microwaved on high for 3-5 minutes, with a recommended operating temperature of 35°F to 220°F (approximately 2°C to 104°C). This performance is comparable to that of virgin materials.
High-temperature performance shows that recycled PP food containers perform well under heat lamps, typically lasting for extended periods at 200°F (approximately 93°C). Specially modified recycled PP food containers exhibit heat resistance comparable to modified virgin materials, with the cold crystallization temperature decreasing only slightly from 126.95°C to 124.66°C.
2.2 Sealing Test Results
Sealing performance is a key indicator for evaluating food container quality, directly impacting food preservation quality and hygiene safety. According to relevant standards, the sealing performance test of recycle takeout containers mainly includes the following aspects:
Regarding leakage rate requirements, according to ASTM F2338, the leakage rate must be ≤0.001mL/min, and the vacuum decay value ≤0.5kPa/min. Another standard, ASTM D3078, requires a leakage rate ≤0.1% at a pressure of 0.5MPa. These standards ensure that the reusable containers for takeout will not leak under normal use conditions.
Sealing pressure testing shows that the sealing pressure of the reusable containers for takeout must be ≥50kPa, and the pressure holding time should be ≥30 minutes. Test methods include the vacuum test method (negative pressure method) and the weight change method. The vacuum test method typically involves placing the sample in a vacuum chamber, evacuating to 20-90kPa, and observing whether bubbles are generated.
Practical application tests show that high-quality recycled PP reusable containers for takeout with a leak-proof design can withstand a vertical drop of a box filled with liquid in a -25℃ rapid freezing environment without cracking, and after thawing, the soup integrity reaches 94%. This superior sealing performance is attributed to the thickened PP material and a carefully designed sealing structure.
2.3 Mechanical Strength Comparison
There are certain differences in mechanical strength between recycled PP and virgin PP, but this gap can be significantly narrowed through appropriate modification techniques:
Tensile strength comparison shows that the tensile strength of virgin PP is typically 30-40 MPa, while that of recycled PP is 20-35 MPa, 20-30% lower than virgin material. Specifically, the average tensile strength of pure virgin PP components is 32 MPa, while that of 100% recycled components averages only 23 MPa, a decrease of 28%.
The change in impact strength is even more pronounced. The impact strength of recycled PP is significantly lower than that of virgin material, exhibiting a certain degree of brittleness. After multiple recycling cycles, the impact strength can decrease by more than 15-50%. For example, GRS-certified recycled PP for reusable containers for takeout has a tensile strength of 29.02 MPa, a flexural modulus of 1057.58 MPa, and an impact strength of only 3.92 kJ/m².
In terms of flexural performance, the flexural strength of recycled PP is about 25% lower than that of virgin material, and the flexural modulus is 1057-2000 MPa, which is reduced due to reprocessing.
However, these performance differences are not insurmountable. Modification techniques such as adding toughening agents and compatibilizers can significantly improve the mechanical properties of recycled PP. For example, adding 50% virgin PP to a recycled PP blend can increase tensile strength by 18% and stiffness by 21%. Using modifiers such as Perkadox® PM-60 ST-GR can improve the impact strength, flexural strength, and tensile strength of recycled PP, increasing its stiffness and reducing its brittleness.
2.4 Appearance Quality and Transparency
Appearance quality directly impacts consumer purchasing intentions and user experience:
Regarding transparency, virgin PP material exhibits consistent transparency, while recycled PP material typically has a yellowish tint. However, specially treated recycled transparent PP material can be made into transparent or semi-transparent products with high transparency, clearly displaying the contents.
Gloss variation shows that virgin PP material has good surface gloss, while recycled PP material is darker in color and has poorer surface gloss. However, by optimizing the production process and adding appropriate additives, the appearance quality of recycled PP can be improved.
Significant breakthroughs have been achieved in color control technology. Through customized intelligent sorting and precision cleaning technologies, companies have been able to achieve a color reproduction rate of over 95% for recycled PP granules used in reusable containers for takeout, reducing the rate of discolored impurities to below 0.01%.
2.5 Service Life and Durability
Service life is an important indicator for evaluating product cost-effectiveness:
Regarding normal service life, the service life of PP reusable containers for takeout is affected by factors such as usage frequency, cleaning methods, high-temperature exposure, physical wear, and material aging. For frequent daily use, it is recommended to replace the container every 6-12 months. Frequent opening and closing can cause the locking mechanism to break, and microwaving more than 5 times per week will gradually make the material brittle.
Regarding normal service life, the service life of PP reusable containers for takeout is affected by factors such as usage frequency, cleaning methods, high-temperature exposure, physical wear, and material aging. For frequent daily use, it is recommended to replace the container every 6-12 months. Frequent opening and closing can cause the locking mechanism to break, and microwaving more than 5 times per week will gradually make the material brittle.
Aging performance shows that PP material will naturally oxidize and yellow after 2-3 years, with its impact strength decreasing by more than 50%. Long-term repeated use, especially frequent high-temperature washing or exposure to sunlight, may lead to material aging, resulting in scratches or cracks on the surface. After natural aging or accelerated aging treatment, the notched impact strength of recycled polypropylene can decrease by more than 50%, exhibiting significant brittleness.
Specific test results provide more specific data. According to the TG constant temperature method, polypropylene food containers can be used approximately 9,700 times in a microwave oven. The lifespan of brand-new PP products is 3-5 times longer than that of recycled products, which is an important factor to consider when choosing a product.
III. Cost-Benefit Analysis
3.1 Raw Material Price Comparison
Recycled PP has a significant price advantage over virgin PP, which is its core competitive advantage in the market:
Domestic market prices (November 2025 data) show that the price of virgin PP is approximately RMB 8,000-12,000/ton. The price of recycled PP varies considerably depending on quality: white recycled PP granules are RMB 6,000-6,200/ton, black recycled PP granules are RMB 4,150-5,200/ton, and PP reusable containers for takeout briquettes are even cheaper, at RMB 3,500-4,000/ton.
International market prices: In the European market, the price of unbleached recycled PP granules is €1,820/ton (approximately RMB 14,000/ton), and the price of black granules is €765/ton (approximately RMB 5,900/ton). The price of recycled PP in the US market is $800-1200/ton (approximately RMB 5800-8700/ton).
Price advantage analysis shows that recycled PP is 20-40% cheaper than virgin PP, saving an average of RMB 2000-4000 per ton. This price advantage makes recycled PP highly competitive in cost-sensitive applications.
3.2 Production Cost Structure
Understanding the production cost structure of recycled materials helps in comprehensively assessing their economic value:
Raw material costs are the largest cost item, accounting for a significant proportion of the total cost. The cost of waste plastic raw materials is RMB 0.8-1.2/kg (RMB 800-1200/ton), while the selling price of recycled granules is RMB 6-8/kg (RMB 6000-8000/ton).
Raw material costs are the largest cost item, accounting for a significant proportion of the total cost. The cost of waste plastic raw materials is RMB 0.8-1.2/kg (RMB 800-1200/ton), while the selling price of recycled granules is RMB 6-8/kg (RMB 6000-8000/ton).
Regarding equipment investment costs, the main equipment includes crushers, washing equipment, separation equipment, extruders, and granulators, accounting for 30% of the total investment. Taking a production line with an annual output of 5,300 tons as an example, the equipment investment is approximately 20 million yuan. Based on a 10-year depreciation period, the annual depreciation cost is approximately 2 million yuan, equivalent to 377 yuan per ton.
Energy consumption costs have decreased significantly in recent years. Traditional equipment consumes 80 kWh/ton, while new equipment has reduced this to 55 kWh/ton, a 32% decrease in unit energy cost. Electricity costs are approximately 0.5 yuan/kg (500 yuan/ton). In some regions, due to being classified as "high-energy-consuming industries," the cost per kWh increases by 0.15-0.25 yuan, increasing the electricity cost per ton of product by 200-300 yuan.
Labor costs are relatively stable, at approximately 0.3 yuan/kg (300 yuan/ton). Based on an annual output of 5,300 tons, the annual labor cost is approximately 3 million yuan, equivalent to 566 yuan per ton. Other costs include pre-processing costs, such as cleaning, crushing, and sorting, accounting for 40% of the total cost, and deep processing costs, such as melting and granulation, accounting for 60%. Indirect costs such as manufacturing expenses, management expenses, and financial expenses account for 25% of the total cost.
3.3 Production Efficiency and Yield Rate
Production efficiency and yield rate directly affect the final economic benefits:
Production efficiency data shows that an advanced PP food container sheet granulation production line can achieve an hourly output of 500-600 kg, with a daily output of approximately 12-14 tons. The processing capacity for mixed commercial waste recycling is 17.4-19.2 tons/hour.
Production efficiency data shows that an advanced PP food container sheet granulation production line can achieve an hourly output of 500-600 kg, with a daily output of approximately 12-14 tons. The processing capacity for mixed commercial waste recycling is 17.4-19.2 tons/hour.
Factors affecting the yield rate mainly include raw material purity and equipment efficiency. For every 0.1% increase in raw material ash content, the average yield rate of granulation decreases by 2.3 percentage points, the frequency of equipment cleaning increases by 1.8 times/week, and unit energy consumption increases by 4.7%. The recycled material yield of single-material PP food containers can reach over 85%, far exceeding the less than 40% of composite packaging.
Technological improvements are significant. Through AI and robotic sorting technology, the extraction rate of food-grade PP can reach 50%, with a purity exceeding 95%. The material recycling rate of the new granulation equipment exceeds 95%, and the equipment's energy consumption is reduced by 30-40% compared to traditional models.
3.4 Economies of Scale Analysis
Economies of scale are crucial for cost control of recycled materials: Significant cost differences exist between different scales. Leading companies with an annual processing capacity of over 100,000 tons can increase their gross profit margin from 38.9% to 6-8% (this data may be incorrect; it should be 60-80%). Medium-sized enterprises (annual production of 5,000-20,000 tons) can achieve recycled PP granule prices 5% lower than the market average through a "centralized procurement of recycled materials + automated production line" model. Small enterprises (with an annual output of less than 5,000 tons) have a gross profit margin of only 38.9%, lacking economies of scale.
The industrial cluster effect brings additional cost advantages. The area surrounding the Guangdong Plastics Exchange has attracted 120 recycled plastics processing enterprises. By sharing logistics and testing resources, the overall cost of enterprises in the region has been reduced by 20%.
The scale effect of technology is reflected in equipment investment. The unit product investment cost of large-scale equipment is lower. For example, the depreciation cost per ton for a 5,300-ton-per-year production line is 377 yuan, while the depreciation cost per ton for a 100,000-ton-per-year production line can be reduced to 97-146 yuan.
3.5 Policy Incentives and Carbon Trading Value
Government policy support and the carbon trading mechanism bring additional economic value to recycled materials:
Tax incentives include:
Tax incentives include:
Value-added tax (VAT) refund upon collection: up to 70%, generally a 50% refund rate.
Corporate income tax incentives: "Three years of exemption and three years of half-reduction" policy, exempt for the first 3 years, and halved for the following 3-5 years.
Environmental protection tax exemption: Comprehensive utilization of solid waste that meets environmental standards is exempt from environmental protection tax.
Local tax reductions: Enterprises with annual sales below 5 million RMB receive a 50% VAT reduction, those between 5 million and 10 million RMB receive a 40% reduction, and those above 10 million RMB receive a 30% reduction.
Corporate income tax incentives: "Three years of exemption and three years of half-reduction" policy, exempt for the first 3 years, and halved for the following 3-5 years.
Environmental protection tax exemption: Comprehensive utilization of solid waste that meets environmental standards is exempt from environmental protection tax.
Local tax reductions: Enterprises with annual sales below 5 million RMB receive a 50% VAT reduction, those between 5 million and 10 million RMB receive a 40% reduction, and those above 10 million RMB receive a 30% reduction.
Regarding direct subsidies, equipment investment subsidies are provided at 40% of the equipment investment amount, with a total subsidy not exceeding 400,000 RMB. Key projects can receive subsidies up to 20 million RMB, supporting projects such as biodegradable plastics and recyclable express packaging. The government also issued 700 billion yuan in ultra-long-term special treasury bonds specifically to support key projects such as waste plastic recycling and comprehensive utilization of bulk solid waste.
Carbon trading value is becoming a new profit growth point. Each ton of recycled plastic can generate carbon emission reduction revenue equivalent to 0.8-1.2 tons of CO2, reducing emissions by approximately 1.5 tons of CO2 equivalent. Based on the national average carbon market price of 60 yuan/ton, the carbon asset value of each ton of recycled plastic is 48-72 yuan. A waste plastic carbon sink trading project in Chengdu shows that 22.965 tons of waste plastic can reduce CO2 emissions by 29.85 tons, a carbon emission reduction of approximately 1.3 tons of CO2 per ton of waste plastic.
IV. Policy and Regulatory Compliance Analysis
4.1 National Standard Requirements
China has a strict standard system for plastic materials used in food contact:
GB 4806.7-2016, "National Food Safety Standard - Plastic Resins for Food Contact," is the core standard, specifying the basic requirements, technical requirements, and testing methods for plastic resins used in food contact. This standard sets the total migration limit for PP materials at ≤10mg/dm², which is a core indicator for assessing the safety of PP materials.
GB/T 38288-2019, "Plastics - Recycled Modified Polypropylene," is a standard specifically for recycled PP materials, specifying the classification and naming, requirements, test methods, and inspection rules for recycled modified polypropylene materials. This standard classifies recycled PP materials into two categories based on their source: industrial products (code 1) and consumer goods (code 2), and into nine grades based on the recycled material content (10%-20% to >90%), specifying key performance indicators such as tensile yield stress, flexural strength, and cantilever beam impact strength.
Hygiene requirements include that the migration of heavy metals (total chromium, vanadium, zirconium, hafnium) be ≤0.01 mg/kg, the migration of primary aromatic amines be ≤0.01 mg/kg, and formaldehyde migration must meet relevant requirements.
Regarding restricted substances, recycled PP materials must meet the limits for restricted substances specified in GB/T 31331-2014, including strict limits on hazardous substances such as lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBBBs), and polybrominated diphenyl ethers (PBDEs).
4.2 Industry Standards and Certification Requirements
In addition to national standards, the industry has a series of stringent certification requirements:
The testing standard system includes:
- GB 31604.8-2021 Total Migration Test for Food Contact Materials
- GB 31604.9-2016 Limits and Detection of Heavy Metals in Food Contact Materials
- GB 9685-2016 Standard for the Use of Additives in Food Contact Materials and Products
ASTM D4239-2014 Hygienic Standard Test Method for Polypropylene Resin (US Standard)
Quality control requirements are extremely stringent. Enterprises must establish a comprehensive quality control system, regularly calibrate and maintain testing instruments, and use standard substances for quality monitoring. Simultaneously, a strict raw material procurement inspection system is required, testing incoming recycled polypropylene materials and additives to prevent the contamination of harmful substances.
Regarding international certification requirements, these mainly include:
- FDA 21 CFR 177.1520 Food Contact Grade PP Material Specification
- EU Food Contact Standard (EU 10/2011)
- RoHS Certification (Restriction of Hazardous Substances)
- GRS (Global Recycling Standard) Certification, which has strict requirements on the content and traceability of recycled materials.
4.3 Local Policy Regulations
Different regions may have special environmental and industrial policies:
Regarding environmental requirements, all regions strictly prohibit the use of phosphorus-containing cleaning agents; the cleaning agent recovery rate must be ≥95%, and wastewater discharge must comply with local environmental standards. Some regions classify the recycling and granulation process as a "high-energy-consuming industry" and implement differential electricity pricing policies.
Industry support policies are emerging in various regions. Zhejiang Province has suggested studying and formulating support policies for the development of the recycled plastics industry to promote the industry's high-end, intelligent, and green development. Sichuan Province supports projects such as biodegradable plastics, recyclable express packaging, and "bamboo-based plastic" product production, with a maximum subsidy of 20 million yuan.
Local subsidy policies include equipment investment subsidies (40% of equipment investment, up to a maximum of 400,000 yuan) and key project subsidies (up to a maximum of 20 million yuan).
4.4 Export Market Regulations
If the product has export demand, it is also necessary to understand the regulatory requirements of major export markets:
The US market requires compliance with FDA 21 CFR 177.1520 standards and FDA food contact clearance. The NextLooPP project has already obtained FDA clearance for the use of 100% food-grade recycled polypropylene, setting an important benchmark for the industry.
The EU market requires compliance with the EU 10/2011 Food Contact Plastics Regulation and EFSA (European Food Safety Authority) standards. The EU has also included recycled plastics in the ETS (Emissions Trading System) appendix, allowing for a partial credit of each tonne of recycled plastic. The UK has implemented plastic packaging tax reforms to encourage companies to use recycled plastics and plans to invest £10 billion to support chemical recycling technologies and infrastructure development.
Other markets also have their own specific requirements. The South Korean market requires compliance with food contact regulations, and SABIC's TRUCIRCLE product portfolio is already used in CJ's Hetbahn rice bowls in South Korea. Japan, Australia, and other countries also have corresponding food contact material standards.
4.5 Compliance Assessment Summary
Based on the above analysis, the compliance of recycled PP reusable containers for takeout materials with new plastic recyclable takeout containers in terms of policies and regulations is as follows: Technical compliance has been fully verified. Through advanced recycling and modification technologies, recycled PP materials can fully meet the standard requirements for food contact materials. The success of international projects such as NextLooPP and PureCycle, as well as technological breakthroughs by domestic companies such as Kingfa Science & Technology, all demonstrate the feasibility of the technology.
The certification path is clear, requiring companies to obtain the following certifications sequentially:
- Domestic Market: GB 4806.7-2016 National Food Safety Standard Certification
- International Market: FDA (USA), EFSA (EU), etc.
- Environmental Certifications: GRS Certification, Carbon Footprint Certification, etc.
- Quality Management System Certifications: ISO 9001, ISO 14001, etc.
Compliance costs are manageable. Although certification fees can reach hundreds of thousands of yuan, and testing costs tens of thousands of yuan annually, requiring regular certification updates, these costs are acceptable compared to the product's market value and policy support.
The development trend is positive. With increasing environmental awareness and stronger policy support, the policy environment for using recycled materials is improving. The government not only provides tax incentives and direct subsidies but also creates additional value for companies through carbon trading mechanisms.
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