China Guangzhou Donoyo Chemical Co., Ltd Company News

In polymer engineering, choosing between PC/ABS (polycarbonate/acrylonitrile butadiene styrene) and PC (polycarbonate) granules is pivotal. While both belong to the polycarbonate family, their distinct properties suit different applications. This analysis compares their composition, key properties, applications, and selection criteria.   Composition: Blend vs. Homopolymer PC/ABS: A polymer blend combining polycarbonate's impact resistance and transparency with ABS's heat resistance and toughness, creating a synergistic material with enhanced performance.   PC: A single polymer renowned for exceptional impact resistance, optical transparency, and dimensional stability. Ideal where clarity and mechanical strength are critical.   Key Properties Compared Impact Resistance: PC/ABS: Delivers good impact resistance from both components. Optimal for durability under mechanical stress. PC: Offers superior impact resistance, preferred for high-strength transparent applications. Heat Resistance: PC/ABS: Provides moderate heat resistance (lower than PC). Suitable for non-extreme thermal environments. PC: Excels with excellent heat resistance, maintaining integrity at elevated temperatures.   Transparency: PC/ABS: Achieves transparency (varying by blend ratio), balancing clarity with impact resistance. PC: Inherently transparent with optical clarity for lenses, displays, and transparent housings. Primary Applications PC/ABS: Automotive components (interiors, connectors), Electrical/electronic housings, Consumer products (appliances, toys), Medical devices. PC: Optical lenses, Electronic displays, Transparent enclosures, Medical devices. Material Selection Factors   Transparency-Strength Balance: Choose PC/ABS: When balancing impact resistance and transparency is vital (e.g., automotive parts). Choose PC: Where optical clarity is paramount (e.g., lenses, displays). Heat Resistance Needs: Choose PC/ABS: For moderate heat resistance + multi-property demands. Choose PC: For high-temperature exposure. Application Priorities: Choose PC/ABS: When versatility, impact resistance, and combined properties lead (e.g., consumer goods). Choose PC: Where optical transparency, high heat resistance, and dimensional stability are essential.   Conclusion: Application-Driven Choice Selecting PC/ABS or PC hinges on specific requirements. PC/ABS excels in impact-resistant, semi-transparent, and versatile applications. PC dominates where optical clarity, extreme heat resistance, and dimensional stability are critical. Both remain indispensable in advanced manufacturing.

The aging of ABS plastic (Acrylonitrile Butadiene Styrene Copolymer) is caused by a combination of environmental factors and inherent characteristics of the material, mainly including the following reasons: 1. Thermal oxidative aging High-temperature accelerated degradation: long-term exposure to high temperatures (> 60 ° C), the butadiene phase (rubber phase) in ABS is easy to react with oxygen, resulting in molecular chain breakage, the material becomes brittle. Performance: yellowing of the surface, loss of gloss, significant reduction in mechanical properties (e.g. impact strength). 2. Ultraviolet (UV) radiation Photo-oxidation: UV light triggers free radical reactions in styrene and butadiene chain segments, destroying the polymer structure. Performance: surface chalking, color fading (especially dark ABS), cracks ("cracking" phenomenon). Protection: need to add UV stabilizers or carbon black and other shading agents. 3. Hydrolysis Moisture sensitivity: The acrylonitrile component in ABS is easy to absorb moisture, long-term exposure to high humidity environment (especially high temperature and high humidity) will trigger hydrolysis. Performance: molecular weight decrease, tensile strength and modulus decrease, silver grain may appear. 4. Chemical corrosion Solvent erosion: ABS is not resistant to strong polar solvents (such as ketones, esters, some halogenated hydrocarbons), which can lead to swelling or stress cracking. Performance: sticky surface, deformation, or even localized dissolution. 5. Mechanical Stress Fatigue Dynamic loading: Repeated bending or impact will trigger microscopic cracks, especially in the butadiene phase expansion, accelerated aging. Performance: Stress whitening, brittle fracture. 6. Environmental Stress Cracking (ESC) Stress + medium synergy: Even weakly corrosive mediums (e.g. detergents, alcohols) may initiate cracks under stress. Performance: sudden brittle cracking without warning. 7. Microbial degradation (rare cases) Certain microorganisms (e.g. molds) may attack additives (e.g. plasticizers) in ABS, leading to surface degradation. Aging Characterization Methods Appearance changes: yellowing index (ΔYI), surface roughness. Mechanical properties: Impact strength, tensile strength reduction rate. Molecular weight analysis: GPC to measure molecular weight distribution. FTIR: Detection of oxidation products such as carbonyl (C=O).   Ps: The above news come from website.

GRS (Global Recycled Standard) is an international, voluntary product certification standard that aims to ensure that the recycled material content in products, the environmental friendliness of the production process, and other aspects meet specific standards. GRS certification was developed by Textile Exchange and is mainly used to monitor the amount of recycled materials used in products and track the source and flow of recycled materials throughout the supply chain.   TC certificate (Transaction Certificate) is a transaction certificate used to confirm that a batch of goods is produced in accordance with the GRS standard. The TC certificate is issued by a certification body to prove that the goods from raw materials to final products follow the specific requirements of standards such as GRS and establish a production and sales supervision chain system. Purpose and role of GRS certification The main purpose of GRS certification is to promote the use of recycled materials, reduce resource waste, and promote the development of a circular economy. Through GRS certification, companies can ensure that the recycled material content and source of their products are transparent, while meeting environmental protection and social responsibility requirements. The GRS standard covers requirements for recycled content, production and sales supervision chain, social and environmental practices, and chemical restrictions. Application process and requirements for GRS certification ‌Obtaining GRS certification‌: The company needs to obtain GRS certification first, which usually involves submitting relevant information to the certification body for review. ‌Issuing TC certificate‌: After obtaining GRS certification, the company needs to submit order contracts and other information to the certification body, which will issue a TC certificate to prove that the goods meet the GRS standards‌.

  Traditional ABS plastic materials have already had better physical and chemical properties. For example, the traditional TV material has good light transmission, suitable for the production of plexiglass, its hardness and maneuverability is also relatively high, in the industrial aspects of the use of a wide range. But its environmental adaptability is very poor, generally in the case of minus 35 degrees to minus 130 degrees outside the deformation will occur. And if it is in the case of direct sunlight, it is easy to be affected by ultraviolet rays and produce color changes, or changes in physical properties. Therefore, traditional ABS materials are generally only suitable for indoor use.     After adding special substances, ABS plastic material inherits the excellent performance of traditional ABS plastic material, and has better stability, and some other properties. This is the infrared ray penetrating ABS plastic material we introduced today. First of all, it has a wider range of adaptable temperatures, and can be used between -35 degrees Celsius and 135 degrees Celsius above zero, without being prone to thermal deformation. Infrared penetration, the color can be in the case of outdoor children are not prone to changes in nature. Therefore, its practicality in daily life is also more extensive.

Recycled ABS Grade A refers to the raw materials used for the edge of the material has not landed, or known as the lower corner of the material, some of the water mouth material, rubber head material, etc., the quality is also better, is not used, in the process of processing the new material, the remaining small edges, or the quality of raw materials is not pass. With these as the gross material processed out of the particles, the transparency is better.   Recycled ABS Grade B refers to raw materials have been used once, but except for high-pressure granulation, high-pressure granulation in the use of imported large pieces of the majority of imported large pieces if the industrial film, is not after the wind and the sun, so its quality is also very good, processed out of the particles of good transparency, which should also be based on the brightness of the particles and whether the surface is rough to judge.   Recycled ABS Grade C refers to raw materials have been used two or more times, processed pellets, its elasticity, toughness and other aspects are not very good.   The recycling sources of ABS recycled plastic pellets are mainly divided into scrap recycling, engineering recycling, etc. However, after recycling and secondary processing of recycled plastic pellets, the original mechanics, elasticity and engineering of ABS pellets are reduced to different degrees.

  Plastic ABS resin is the largest and most widely used polymer, which organically unifies the various properties of PB, PAN and PS, and has excellent mechanical properties with balanced toughness, hardness and rigidity. After actual use, it was found that ABS plastic pipes are not resistant to sulfuric acid corrosion, and will be crushed and cracked when exposed to sulfuric acid. Most ABS is non-toxic, impermeable, but slightly permeable to water vapor, low water absorption, room temperature immersion for one year water absorption rate does not exceed 1%, and the physical properties do not change. The surface of ABS resin products can be polished to produce highly glossy products. In addition, ABS is 3-5 times stronger than general plastics. ABS plastic is odorless and has an ivory-colored translucent appearance, or transparent granules or powders. The density is 1.05~1.18g/cm3, the shrinkage is 0.4%~0.9%, the elastic modulus value is 2Gpa, the Poisson's ratio is 0.394, the hygroscopicity is 250℃.   ABS has excellent comprehensive physical and mechanical properties, good low temperature impact resistance, dimensional stability, electrical properties, wear resistance, chemical resistance, dyeing, finished product processing and mechanical processing. ABS resin is resistant to water, inorganic salts, alkalis and acids, insoluble in most alcohols and hydrocarbon solvents, and easily soluble in aldehydes, ketones, esters and some chlorinated hydrocarbons. ABS resin has low heat deflection temperature, flammability, and poor heat resistance. Its melting temperature is 217~237 °C, and the thermal decomposition temperature is above 250 °C. Many of the modified ABS materials on the market today are doped with nozzle materials and recycled materials. As a result, the performance of the customer's molded products is not very stable.   Ps: The above news come from website.

  Polycarbonate (PC) is an engineering plastic with excellent comprehensive performance, and its output is second only to polyamide (PA). It has excellent properties such as impact resistance, dimensional stability, heat resistance, and transparency, and is widely used in electronic and electrical appliances and the automotive manufacturing industry. Compared with ABS, PC/ABS alloy can improve heat resistance, impact resistance, and improve surface defects such as depression and warping of products. Compared with PC, it can improve fluidity, improve processing performance, reduce the sensitivity of products to stress, and reduce production costs.   Taking automotive applications as an example, ABS/PC alloy is a material that is more suitable for automotive interior parts. It has excellent heat resistance, mechanical properties, and good processing fluidity. The Vicat softening temperature of automotive dashboards made of ABS/PC alloy can reach 110-135℃. In addition, it has good coating properties and adhesion to the covering film. The dashboard does not require surface pretreatment and can be directly sprayed with soft topcoat or coated with PVC film. ABS/PC alloy is also used to manufacture automotive parts such as parts around the dashboard, antifreeze plates, door handles, underflow plates, brackets, steering column covers, decorative panels, air conditioning system accessories, etc.   Ps: The above news come from website.

  There are many advantages of high temperature resistant PC plastics, and the most prominent advantage is its super high temperature resistance and impact resistance. For example, when producing parts such as instruments and meters, high temperature resistant products are needed, and high temperature resistant PC plastics are a better choice. The absorption rate of high temperature resistant PC plastic products is very low, which will not increase the difficulty of work for workers. However, in the process of using high temperature resistant PC plastics, it is necessary to dry and bake the materials to greatly improve the quality of the products.           The wear resistance of high temperature resistant PC plastics is very high. Compared with ordinary products, high temperature resistant PC plastics can play a high wear resistance in the production process, and will not affect the thickness of the product due to certain operating processes, thereby affecting the overall quality. However, this product is prone to melt cracking, which requires the staff to strictly control the molding conditions of high temperature resistant PC plastics during work. Each batch of plastic parts must be cooled, and the quality of plastic parts should not be affected due to improper handling.     Ps: The above news come from website.        

  Today, as the environmental protection wave sweeps the global manufacturing industry, Chinese plastic companies are reshaping the competitiveness of the industry through innovative recycling technologies. Post-consumer recycled plastics (PCR), as a key carrier of the circular economy, have become a green pass for leading domestic brands to break into the international market. Take the latest food-grade TPE launched by Avant as an example. This material containing 25% recycled PP components not only passed the strict review of the US FDA and obtained a no objection letter (NOL), but also broke the industry prejudice that "recycling means low quality" with a hardness performance of 65 Shore A. Its birth confirms the application potential of PCR materials in high-end scenarios such as toothbrush handles and food containers, and provides a replicable technical template for Chinese plastic product companies.     International regulatory dynamics are accelerating the compliance process of PCR materials. In the second quarter of 2024, the US FDA intensively approved 12 recycled plastic notices, covering a variety of polymers such as PET, PP, and PS. Among them, the high-density polyethylene (HDPE) beverage bottle caps of Germany's Gneuss and the chemically recycled PET of the Mexican Alpek Group highlight the parallel development of physical recycling and chemical recycling technology routes. These certifications strictly limit the conditions for the use of materials: for example, when the recycled polypropylene of the Indian Pashupati Group is approved for use in fresh fruit and vegetable packaging, it must meet the E-G temperature specifications (i.e., refrigerated to room temperature environment). If domestic companies want to enter the European and American markets, mastering these grading standards will become the key to breaking through.     The value chain construction of plastic recycling certification requires a systematic layout. Starting from the traceability of raw materials, brands need to establish a transparent recycling collection system to ensure that PCR components can be traced back to food contact grade waste plastics. The production process must pass certifications such as the GRS Global Recycling Standard, which requires at least 20% of recycled materials to obtain access qualifications, and the use of certification labels must be increased to more than 50%. It is worth noting that a modified plastic company in Dongguan successfully entered the Coca-Cola supply chain last year after winning the GRS certification with its "bottle-to-bottle" rPET technology, confirming the recognition of the certification system by international brands.     Technological innovation is breaking the performance bottleneck of PCR materials. The compatibilizer formula developed by a Ningbo company effectively solved the problem of molecular chain degradation caused by multiple recycling, and increased the impact strength of recycled HDPE by 40%; while the devolatilization technology of Shanghai Institute of Chemical Industry successfully removed the odorous small molecules in the recycling process. These breakthroughs have pushed PCR materials to extend from low-end packaging to high-value fields such as automotive parts and electronic appliances. According to industry forecasts, the scale of China's recycled plastics market will exceed 20 million tons in 2025, and companies that have laid out technical patents in advance will occupy the commanding heights in the competition.     For plastic brands planning to expand their international business, it is recommended to adopt a three-stage strategy: initially, choose a single category of PCR resin (such as rPET) with mature technology to enter, and establish market trust through FDA no objection letters or GRS certification; in the medium term, jointly build a closed-loop system with recycling companies, such as toy manufacturers cooperating with community recycling outlets to obtain food-grade waste plastics; in the long term, explore chemical recycling technology to convert mixed waste plastics into oil-based raw materials to achieve infinite circulation. Only by integrating environmental certification into the entire life cycle of products can Chinese plastic brands truly achieve green premiums.

  With the mandatory implementation of the "Technical Specifications for the Use of Recycled Plastics in Household Appliances" (T/CHEAA 0034-2024) in January 2025, home appliance companies must achieve a maximum of 20% post-consumer recycled plastic (PCR) addition ratio. This policy is driving deep changes in the industrial chain. A modification factory in South China uses molecular-level purification technology and a three-layer melt filtration system to remove 5-micron metal impurities in PCR, increasing the transmittance of recycled polypropylene to 92% and the impact strength to 98% of the original material standard. At the same time, packaging companies in East China introduced AI visual sorting equipment to increase the purity of PET bottle recycling to 99.2% and reduce raw material costs by 30%. The key to technological breakthroughs lies in overcoming the performance bottleneck of recycled materials. The nano-calcium carbonate reinforcement system developed by a leading company successfully increased the bending strength of PCR-ABS materials to 65MPa, replacing imported raw materials for high-end air-conditioning shells. It is worth noting that GRS global recycling standard certification is becoming a market pass - certified companies need to establish a full-link traceability system, and each batch of goods must match the TC transaction certificate, covering 12 types of certification documents such as raw material procurement contracts and transportation documents. A daily necessities company in Ningbo has achieved a 40% increase in export orders with GRS-certified food-grade PCR-PET lunch boxes. The industry reshuffle has accelerated. A Dongguan injection molding factory used uncertified PCR materials, resulting in a product brittle cracking rate of more than 15%, resulting in losses of more than 3 million yuan; while leading companies have used high-performance marine plastic (OBP) technology, combined with molecular chain repair technology to increase the impact strength of recycled PET by 3 times, and cooperate with UL 2809 environmental certification to open up the high-end market. With the GB/T 16288 standard forcing products to be labeled with recycled content, China's plastics industry is shifting from passive compliance to technology-driven value creation.

  Under the global environmental protection wave, post-consumer recycled plastics (PCR) are becoming the core competitiveness of China's manufacturing. The "Technical Specifications for the Use of Recycled Plastics in Household Appliances" (T/CHEAA 0034-2024), which will take effect in January 2025, requires that the proportion of PCR added to household appliances be up to 20%. This policy forces the industrial chain to upgrade. A modification factory in South China uses molecular-level purification technology and three-layer melt filtration to remove micron-level metal impurities in PCR, so that the transmittance of recycled polypropylene is increased to 92%, and the impact strength reaches 98% of the original material. Relying on the AI ​​visual sorting system, packaging companies in East China have increased the purity of PET bottle recycling to 99.2%, reducing raw material costs by 30%.      The key to technological breakthroughs lies in breaking the performance bottleneck of recycled materials. The nano-calcium carbonate reinforcement system developed by a leading enterprise has enabled the flexural strength of PCR-ABS materials to exceed 65MPa, successfully replacing imported materials for high-end air conditioner shells8. What is more noteworthy is that GRS global recycling standard certification is becoming a market pass - companies that pass this certification need to build a full-link traceability system, match each batch of goods with a TC transaction certificate, and provide 12 types of certification documents such as raw material procurement, transportation, and recycler qualifications. A daily necessities factory in Ningbo has increased its export orders by 40% with its GRS-certified food-grade PCR-PET lunch boxes.     The industry reshuffle has quietly taken place. A Dongguan injection molding factory suffered a loss of 3 million yuan due to the use of uncertified PCR materials, resulting in a product brittle cracking rate of over 15%; and Veolia Huafei, through the high-performance technology of marine plastics (OBP), jointly with the Chinese Academy of Sciences team, used molecular chain repair to increase the impact strength of recycled PET by 3 times, and combined with UL 2809 environmental certification to open up the high-end market4. With the GB/T 16288 standard requiring the labeling of recycled content on products, the green transformation of China's plastics industry is shifting from passive compliance to technology dividend-driven.

  The EU's "Packaging and Packaging Waste Regulation" (PPWR) sets a strict threshold: from 2030, the content of post-consumer recycled materials (PCR) in plastic packaging must reach 30%, and those who fail to meet the standard will be subject to a plastic tax of 800 euros per ton. This policy makes GRS Global Recycling Standard Certification a key breakthrough for Chinese companies - a plastic bag factory in Dongguan has relied on this certification to enter the supply chain of fast fashion giants with its 100% PCR composite packaging bags, with annual exports exceeding 180 million yuan.   The core value of GRS certification lies in building a reliable traceability system. Taking recycled plastic bags exported to the EU as an example, companies need to match TC transaction certificates for each batch of goods and provide 12 types of certification documents such as raw material procurement contracts, transportation documents, and recycler qualifications. A packaging company in Xiamen uses blockchain technology to shorten the traceability cycle from 7 days to 2 hours, greatly improving customer trust. The more far-reaching impact is in profit reconstruction. A daily necessities factory in Ningbo transforms PIR injection molding scraps into food-grade tableware, and the product premium reaches 25% after passing GRS certification; a material company in Shandong enters the UK infrastructure market with UKCA-certified PIR insulation boards, and its profit margin increases by 18%.   Technological innovation and certification are forming a synergistic effect. The high-performance technology of marine plastic (OBP) developed by the Chinese Academy of Sciences team increases the impact strength of recycled PET by 3 times through molecular chain repair, and opens up the high-end market with UL 2809 environmental certification. When TC certificates become the hard currency of green trade, China's plastics industry is moving from the OEM model to a new battlefield for standard setters.