China Guangzhou Donoyo Chemical Co., Ltd Company News

  Growing awareness of plastic pollution’s impact on ecosystems and human health has spurred efforts to reduce plastic consumption. A significant concern is ocean plastic pollution—current estimates suggest 150 million tons of plastic reside in marine environments, with 8 million tons added annually. Without intervention, plastic could outweigh fish in the oceans by 2050. To combat this, the EU mandates that by 2025, plastic products must contain at least 25% PCR content. Such policies are driving brands to adopt PCR materials, not only to comply with regulations but also to demonstrate environmental responsibility. Using PCR plastic reduces waste, conserves resources, decreases reliance on virgin fossil fuels, and supports a circular economy.

Recycled plastics are categorized based on resin type and source. Key types include:   Recycled Low-Density Polyethylene (LDPE): Often derived from plastic films such as grocery bags, food packaging, liners, and agricultural mulch films. These are typically natural or lightly colored and require sorting before processing.   Recycled Polypropylene (PP): Sourced from everyday items like storage boxes, buckets, chairs, woven bags, and packing tapes. PP is valued for its versatility and durability.   Recycled Polyethylene Terephthalate (PET): Primarily from post-consumer beverage and food containers. PET is lightweight, shatter-resistant, and energy-efficient to recycle, making it ideal for reuse in packaging, textiles, and more.   Recycled ABS Plastic: Usually recovered from electronic housings, household appliances, and mechanical components. It offers good impact strength and surface finish, suitable for durable goods.

  PCR (Post-Consumer Recycled) plastic refers to materials recovered from products that have completed their life cycle, such as packaging, appliances, and automotive parts used by consumers. In contrast, PIR (Post-Industrial Recycled) plastic originates from manufacturing waste—including sprues, off-spec products, and defective items—generated during production and recycled directly within industrial facilities. The key distinction lies in the source and volume: PCR represents a significantly larger waste stream from daily consumption. Without recycling, post-consumer plastics contribute massively to pollution each year. Adopting PCR materials helps address this environmental challenge while supporting circular economy goals. Furthermore, regulatory measures are increasingly favoring PCR adoption. For example, the UK’s Plastic Packaging Tax imposes a fee of £200 per ton on packaging with less than 30% recycled content. Similarly, corporate social responsibility mandates in China and other regions are encouraging both domestic and international brands to integrate PCR plastics into their products.

  The Global Recycled Standard (GRS) is an international, voluntary certification that verifies the recycled content in products and ensures environmentally and socially responsible production processes. Developed by Textile Exchange, it tracks recycled materials through the supply chain—from source to final product—promoting transparency and sustainability. The Transaction Certificate (TC) is a vital document issued by a certification body that confirms a specific shipment complies with GRS requirements. It serves as proof that products contain certified recycled content and adhere to environmental and social criteria throughout manufacturing. GRS certification helps companies reduce resource waste, support recycling markets, and meet growing consumer and regulatory demands for eco-friendly products. The certification process involves rigorous assessment of recycled material content, supply chain traceability, chemical usage, and social and environmental practices.

  PCR (Post-Consumer Recycled) plastic represents material reprocessed from end-of-life consumer products including packaging, electronics, and automotive components. This distinguishes it from PIR (Post-Industrial Recycled) material, which originates from factory scrap generated during manufacturing processes. The critical difference lies in the volume and source of material, with PCR addressing the substantially larger waste stream of post-consumer plastics.   The adoption of PCR plastics addresses several pressing concerns. Most significantly, it diverts substantial volumes of post-consumer plastics from landfills and oceans, directly reducing environmental pollution. Regulatory pressures are increasingly driving PCR adoption, exemplified by policies such as the UK's Plastic Packaging Tax that imposes substantial fees (£200/ton) on packaging containing less than 30% recycled content. Similar sustainability mandates are emerging globally, compelling corporations to incorporate recycled materials.   Beyond compliance, PCR usage enhances resource efficiency by reducing demand for virgin fossil resources including oil and gas. It also aligns with growing consumer demand for eco-friendly products, providing brands with environmental credentials that resonate with increasingly conscious markets. This combination of regulatory pressure, environmental responsibility, and market demand makes PCR plastic an essential component of circular economy initiatives.

PCR (Post-Consumer Recycled) plastic is reprocessed from end-of-life consumer waste (e.g., packaging, electronics, automotive parts). Contrasted with PIR (Post-Industrial Recycled) – from factory scrap – PCR tackles larger waste streams.   Key Drivers for PCR Adoption: Waste Reduction: Diverts post-consumer plastics from landfills/oceans.   Regulatory Pressure: UK’s Plastic Packaging Tax (£200/ton if

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.