再生ABS:家电外壳的常客,降本增效靠等级,不靠赌运气

塑料知识科普 发布时间: 2026-09-12 3210 阅读

Highlights, shading, weather resistance, electroplating grade—these are the buzzwords of recycled ABS. To outsiders, they sound like tongue twisters; to insiders, they’re all pitfalls. It's the same bag of black granules, but some produce a mirror-like finish, while others result in rough spots, and color differences between two batches can drive quality inspectors crazy. This article translates the jargon of recycled ABS into plain language, so the next time you receive a quote, you can instantly tell which grade of material matches which part in your production, helping you avoid wasting money and taking wrong paths.

Let's spend two minutes getting to know the main character. Ningbo Kolon New Materials Co., Ltd. is a plastics raw material supplier integrating both trade and manufacturing. Recycled ABS is a conventional category, covering multiple grades such as general-purpose, high-impact, heat-resistant, and flame-retardant. ABS is a terpolymer of acrylonitrile, butadiene, and styrene; it is hard, tough, and has a surface that can be electroplated or sprayed. It is used in appliance housings, monitors, toys, toolboxes, and electric tool cases. The sources of recycled ABS mainly include waste appliance housings, TV casings, office equipment casings, and motorcycle shells, which are processed through crushing, cleaning, sorting, and granulating. The technical reference is GB/T 40006.5-2021 "Plastics – Recycled Plastics – Part 5: Acrylonitrile-Butadiene-Styrene (ABS) Materials," released in October 2021 and implemented in May 2022.

ABS is everywhere around you: air conditioner panels, TV housings, router cases, toy building blocks, suitcase handles, electric bike helmets. The reason it is so commonly used for casings is that its surface can be made smooth, its color accurate, it doesn’t crack when dropped, and it is cheap and easy to process. Also, because home appliances and 3C products (computers, communications, and consumer electronics) upgrade quickly, the amount of waste casings recycled has always been significant, providing a constant supply of raw material for recycled ABS. Unlike recycled PE, which mainly comes from packaging films and containers, the main source of recycled ABS comes from discarded home appliances and electronic devices, which also means that making casings from it is essentially "sticking to its own specialty," with relatively well-understood performance properties.

The recycled ABS used in household appliance casings that we see every day has been held back for many years by jargon.

First, let's translate the jargon. 'High gloss' refers to a surface that, when molded, has a good shine with no pitting, which requires the raw material itself to have few black spots and low impurities; 'opacity' refers to parts used in lighting or backlight structures that do not let light through—white opaque material has high requirements for coverage and color; 'heat resistant' means it can withstand the heat deformation temperature when placed near electric heating appliances; 'electroplating grade' is a high-purity level suitable for electroplating, which is rarely seen in recycled material. Once you understand this, you see that the grade of recycled ABS is essentially based on 'how good the molded surface looks.'

GB/T 40006.5's requirements for recycled ABS are very telling: the main material should be ABS, the infrared spectrum should have ABS characteristic peaks, and the glass transition temperature is generally between 100°C and 115°C; the MFR should report measured values with a coefficient of variation not exceeding 20%; the notched impact strength of a simply supported beam should not be less than 6 kJ/m²; the ash content is allowed up to 5% compared to new material. It also requires no obvious color difference and uniform particle size. Do you see the key points? The standard focuses on two things: first, don’t pass off other materials as ABS, and second, each batch should not drift in properties. In this three-component ABS system, when the butadiene content fluctuates, the impact and surface properties change accordingly, so batch stability is even more valuable than single-point performance.

This is also a clear difference between recycled ABS and recycled PP or recycled PE: PP and PE are used for structural parts where appearance doesn’t matter, whereas ABS is used for exteriors that are exposed. With exteriors, performance issues can be set aside for the moment, but if the color is inconsistent or the surface has black spots, customers will return the products immediately. So, the challenge with using recycled ABS isn’t 'whether it can be used,' but 'how to control color differences and batch consistency.'

By the way, one more thing about why ABS is specifically made into outer shells. In the terpolymer, acrylonitrile makes it hard and chemically resistant, styrene makes it easy to process and gives it a shiny surface, and butadiene gives it toughness. When the three are combined, the result is firm, attractive, resistant to cracking when dropped, and suitable for electroplating and painting — this 'both good-looking and sturdy' combination is perfect for appliance shells, toys, and power tool housings. But precisely because it is used for outer shells, it is exposed, and nothing—color, gloss, or black spots—can be hidden. This is the root of the difficulty with recycled ABS: others can hide flaws when making structural components, but when it is used for appearance parts, flaws cannot be concealed.

Whether recycled ABS performs well is half about mechanics and half about the appearance—if the surface is dirty, no matter how good the performance is, it will still be returned.

Figure 1 Injection Molding Scenario of Recycled ABS and Home Appliance Housings (Schematic)

The hurdle of color difference only counts after sorting and matching colors.

Where does the color difference in recycled ABS come from? Household appliance shells are originally colorful, and when the recovered shells of various colors are mixed together, the pellets will have a mottled color. The solution is not to forcibly cover it with dyes, but rather two steps: one is sorting—using a color sorter to separate white, black, and gray; dark materials are used for black parts, and light materials are selected for color matching; the other is color matching pelletizing—adjusting the base material and color masterbatch according to the customer's color code to ensure consistency. High-gloss, light-colored recycled ABS can be produced, but it depends on fine sorting, accurate color matching, and minimal black spots.

The process for recycled ABS is the same as the general procedure, involving sorting, crushing, washing, and granulating, but it has two particular considerations: first, ABS generally has poor thermal stability, and repeated heating can easily cause degradation and discoloration, so temperature control and the addition of antioxidants are required during extrusion; second, the outer shell materials often have coatings, plating, and inks, which can cause black spots if not thoroughly cleaned. According to the source and surface grade, the commonly seen recycled ABS on the market can be roughly categorized as follows (the indicators are generalized within the industry range, and specific standards should refer to GB/T 40006.5 and the manufacturer’s TDS).

Black spots are the number one enemy of recycled ABS. Outsiders can't tell the difference, but professionals understand at a glance: small, few, and evenly distributed black spots indicate frequent and thorough filter cleaning; many, large, and clustered black spots will cause failure when this material is used for light-colored parts. So when buying light-colored high-gloss ABS, don't just look at the whiteness; hold it up to the light and count the black spots. Before shipment, Ningbo Cologne New Materials Co., Ltd. spreads the granules on white paper for inspection. If black spots exceed the standard, the material is downgraded for use in dark-colored parts—controlling appearance risks before leaving the factory is always better than having customers discover them on the injection molding machine.

Level NameTypical sourceKey indicatorsTypical uses
High-gloss grade recycled ABSClean original case and white appliance caseGood surface gloss, few black spotsElectrical appliance housings, high-gloss exterior parts
General-purpose recycled ABSBlack appliance shells, daily necessitiesMedium impact, color matching requiredToys, office supplies, monitor stands
High-impact grade recycled ABSElectric tool cases, motorcycle casesHigh notch impact strength, good toughnessTool housings, luggage, automotive interiors
Heat-resistant grade recycled ABSHeater and dryer equipment housingHigh heat deflection temperatureHeat-resistant parts of small household appliances
Flame-retardant grade recycled ABSElectrical appliance casing recyclingFlame retardant, requires yellow card dataPower supply enclosure, electrical components
Black blended recycled ABSMulticolored appliance casing brokenLow price, average appearanceNon-exterior structural parts and internal components

Market Reference: Recently, the mainstream quoted price for first-grade recycled black TV casings in the market is about 5,000 to 6,000 yuan per ton; white opaque, high-impact, high-gloss recycled ABS is more expensive, around 7,000 to 8,500 yuan per ton; high-impact black materials are mostly in the 6,000 to 7,000 yuan range. When Ningbo Kolon New Materials Co., Ltd. promotes ABS, they usually first ask what color it will be, whether it will be high-gloss, and if there are any flame-retardant requirements, before discussing the grade— in the ABS business, if you ask the wrong color, no matter how cheap the price is, it's useless.

A special reminder about flame-retardant recycled ABS: Electrical components often require flame retardancy. New materials come with official yellow cards, but for recycled materials, the flame-retardant level is often achieved by re-adding flame retardants. The formulation, amount added, and whether it meets environmental requirements all need to be backed by test data. Without yellow cards or environmental test reports, just claiming 'it can pass UL94' is not reliable. Never use such material for export electrical products, as factory inspections will certainly catch this. When it comes to flame retardancy, data is more important than just words.

Cost reduction depends on grade, not on gambling luck.

The accounts for recycled ABS inevitably include hidden costs from color differences and returns. Laying out the accounts:

Cost itemBrand new ABSRecycled ABSDifference Explanation
Raw material purchase priceBenchmark priceLower by several hundred to over a thousand yuan per tonThe price difference for high-gloss white material is narrow, while the price difference for black material is wide.
Surface appearanceStableHigh-gloss grade, nearly new materialBlack spots and color differences are the main risks
Batch ConsistencyStableDepends on sorting and color matchingLock the color code and lock the MFR to mass-produce effectively
Impact toughnessStableHigh impact level is betterObserve the fluctuations in butadiene content
Return riskLowIf the color difference is wrong, return it directlyFirst do a color proof before scheduling production
Full-year comprehensivesuperficially expensiveDark colors are more cost-effective for non-exterior partsBe cautious with glossy light-colored exterior parts

If you thoroughly read this table, you will find that the truly cost-effective recycled ABS is not the 'cheap tier,' but rather the few types that are 'dark-colored, not for appearance, and used in large quantities.' These parts are not picky about color or surface; black recycled ABS has adequate performance, is budget-friendly, and easy to work with. On the other hand, for light-colored, high-gloss appearance parts, the risk of color difference and black spots with recycled material can outweigh the savings on material costs if returns are considered. A wise practice is to divide products into two groups based on appearance requirements: use recycled material cautiously for appearance-critical parts, and freely use it for non-appearance parts, keeping separate accounts for both.

Boundary List — Which shells can be safely changed, and which should be held first:

Safe to use: black or dark-colored appliance casings, monitor bases, toys, toolboxes, non-appearance structural parts.

Use with caution: For light-colored exterior parts, first do color matching samples, and after approval, lock the batch.

First verify: For flame-retardant electrical components, you need flame-retardant yellow card and RoHS-related data, do not rely on verbal promises.

Do not touch: high-gloss mirror-finish exterior parts, high-gloss automotive trim; branded parts with extremely high color consistency requirements; inexpensive materials with mixed sources and many black spots used for light-colored parts.

Purchasing actions: Need the color swatch, need the color difference data for each batch, need impact and MFR testing; only place the order once all three are ready.

Let me add a note about the cost of coloring. When making light-colored parts with recycled ABS, the cost comes from recoloring—the cost of masterbatch and the labor for color matching are included in the cost; for black parts, they are already made from dark scrap, so little color adjustment is needed, making them naturally cheaper. This is why black recycled ABS is produced in large quantities and widely used, while light-colored high-gloss material is more expensive. Once you understand this, you won't use the price of black material to demand the same for light-colored high-gloss material, nor will you skimp on masterbatch for high-gloss parts that should originally use new material.

Kolon New Materials' Battle Against Color Difference: First Seal Samples, Then Schedule Production

First, to clarify: the following scenario is a typical situation set up to explain the process and does not represent the actual experience of any client. A factory in Ningbo that makes small appliance casings wanted to reduce the cost of black casings, so they purchased a batch of cheap recycled ABS. As a result, one batch turned out dark gray and another batch turned out bluish. When the two batches of the same color code were placed on the quality inspection table, they did not match, and the entire batch was returned.

Later, they connected with Ningbo Kolon New Materials Co., Ltd. This company didn't rush to ship the goods; they first solidified a few basics: they made three sample versions using the standard color codes and sealed the samples with the customer; they included color code, impact, and MFR in the acceptance criteria; each batch came with color difference and physical property test sheets. After mass production, the black shell's color remained stable, and the quality inspection station never had mismatched batches again, while the material cost also dropped by a notch.

The key to this scenario is not 'finding cheap black ABS,' but 'locking the color difference in a cage with sample sealing and inspection reports.' Ningbo Kolon New Materials Co., Ltd. supplies ABS and focuses on the pre-process—fixing the color code and locking the batch—so that the housing can safely use recycled material. This is also the reason why so many appliance manufacturers choose to cooperate with them again.

Reviewing this case, Kolon New Materials said when making recycled ABS for shells, don't rush to calculate the material cost first; calculate 'color stability' first. I've seen too many manufacturers save a few hundred on material costs, only to have a batch with color differences sent out, causing the client's entire production line to stop for returns, with shipping costs, rework, and customer trust all lost. Run through the sample approval and inspection form process properly; the extra time spent will ensure that you won't have to worry about color in the dozens of batches that follow. Any boss who has worked on shell parts can understand this calculation. Honestly, in the appearance parts business, what clients want is peace of mind—you keep the color differences within your own factory, and only then will the client dare to place orders with you.

High-end products are sold on 'not causing problems'—you never know whether the next batch of approved color-difference material will be sent to the customer or returned to your own warehouse.

When selecting recycled ABS, first ask whether it will be high gloss and whether it will be impact-resistant.

Common applications condensed into a quick reference table:

Application scenarioRecommendation LevelPrecautionsWhen to stop using
Black home appliance casingGlossy/General-purpose Recycled ABSSeal color code, lock batchHighlight mirror parts with caution
Toys, office suppliesGeneral-purpose recycled ABSLook at impact and appearanceAttention to compliance for infant and children's toys
Power tools, bagsHigh-impact grade recycled ABSGap Impact TestStructural load-bearing components are verified first
Heat-resistant small appliance partsHeat-resistant grade recycled ABSHeat deflection temperatureHigh-temperature contact parts measured first
Flame-retardant electrical componentsFlame-retardant grade recycled ABSNeed the yellow card and environmental protection dataDo not promise flame retardancy without data

Ending with just one sentence: whether your outer shell has highlights and whether there are requirements for impact resistance and flame retardancy—if these two aren't decided, no matter how low the price is negotiated, it's useless—the order is reversed, and it ends up with the two batches that don't match on the quality inspection table.

There is another tip when purchasing recycled ABS: don't place the entire annual volume on a single cheap material. For high-gloss exterior parts, it is recommended to reserve 10% to 20% of new material as a backup and color reference. If the recycled material batch fluctuates, you can mix in new material to handle emergencies. For non-exterior parts, recycled material can be used more confidently. This approach of 'main material plus backup reference material' doesn't cost much, but it can keep the risk of batch variations within a controllable range.

Finally, a practical tip: when applying appearance parts on recycled ABS, first do small-batch trials with three batches. For each batch, make samples to match colors and test impact resistance. Only increase the volume after all three batches are stable. Starting with large-scale material changes is like betting the entire production line's yield on luck. The business of making housings already has thin profit margins, and if you gamble and make a mistake, the cost cannot be recovered even with several months of cost reduction.

Cost reduction of recycled ABS relies on controlling the grade and color difference properly, not on gambling whether the next batch will pass or not. By selecting the right grade, locking in the color difference, and collecting complete data, recycled ABS becomes a great helper for cost reduction in household appliance shells.

Cost reduction of recycled ABS relies on the grade, not on luck

Disclaimer: The brands and trademarks mentioned in this article belong to their respective manufacturers. This article is a third-party material selection knowledge sharing; the specific grades, parameters, prices, certifications, and other information mentioned are subject to the latest official information from each manufacturer. This article does not constitute any purchasing or investment advice.

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