Technology | SUHUI Machinery

Is ABS Recyclable and How It Is Processed

ABS is recyclable and is recycled at industrial scale, just not through household collection. It reaches recyclers as electronic housings, automotive interior parts and moulding scrap rather than as packaging, which makes the volumes smaller but far more consistent and the value per tonne high enough to justify sorting effort. This article covers the three industrial feedstock channels, the density overlap with HIPS that defeats a plain water tank, why near-infrared sorting fails on black housings, why brominated flame-retardant grades are a compliance problem rather than a quality one, and what a granulating and pelletizing line does with the material once it has been separated.

22 Aug

Technology | SUHUI Machinery

How Polypropylene Recycling Sets the Grade of the Pellet

Polypropylene recycling is usually discussed as a collection problem. This article covers the other half — what recycled PP is as a resin. Why chain scission raises its melt flow index while polyethylene does the opposite, why the antioxidant package has to be rebuilt at the compounding step, how homopolymer, random copolymer, impact copolymer and mineral-filled grades all arrive in one bale looking identical, and what each destination for recycled PP actually demands.

22 Aug

Technology | SUHUI Machinery

Why LDPE Recycling Yields Less Than the Bale Weighs

LDPE recycling turns agricultural mulch, greenhouse cover, stretch wrap and packaging film into washed flake or pellet. The polymer is easy; what limits the operation is everything that arrives with it. This article follows the tonnage from bale to pellet — the six places it leaks away, how the three common film streams differ, why the last few points of moisture cost the most, and why printing ink sets the price of the output before the line is even specified.

21 Aug

Technology | SUHUI Machinery

HDPE vs LDPE vs PP and How to Tell Them Apart on the Line

HDPE, LDPE and PP are all hydrocarbon polyolefins, they all float in water, and no colour or smell separates them. This article gives the density and melting point bands that do separate them, a nine-line identification table with the field checks that stand in for each number, the point where PP and LDPE density bands overlap and float-sink stops working, how near-infrared sorting reads the difference and where it goes blind, and what a mixed polyolefin melt actually costs in impact strength and pellet grade.

21 Aug

Technology | SUHUI Machinery

What Regrind Plastic Is and How Much You Can Blend

Regrind plastic is the cheapest raw material in any moulding or extrusion shop, because you already paid for it once. It is also the material most likely to produce a batch nobody can explain. This guide stays on the material side of the question, separating regrind from repro and bought-in recyclate, setting out what actually degrades when plastic is reground and remelted, explaining why colour and contamination accumulate faster than strength is lost, naming the four constraints that cap a blend ratio, and showing how the crusher screen and blade condition that produce the regrind decide how well it behaves later.

20 Aug

Technology | SUHUI Machinery

Melt Flow Index and What It Tells You About Recycled Resin

SUHUI builds recycling and extrusion lines, not testing instruments, and this article is not about how to run the test. It is about what a line engineer does with the result when a lot of recycled resin arrives with a melt flow index on the docket. It covers why the number moves during recycling and which direction it moves in each polymer, how to read a series of readings as a degradation record, which processes a given value can still feed, how the reading drives screw type, degassing and pelletizing method, and the four things the measurement cannot see on recycled feed.

20 Aug

Technology | SUHUI Machinery

What Plastic Granules Are and How Buyers Judge Quality

Plastic granules are polymer supplied as small uniform pieces a few millimetres across, either virgin from a resin producer or recycled from a pelletizing line. This guide covers the seven properties a buyer actually checks before accepting a load — size spread, fines, black specks and metal, moisture, colour, odour and melt flow consistency — why moisture is three different numbers depending on the polymer, how to sample and test a delivery at goods-in, and what a producing line's configuration tells you about the granules it makes.

Plastic Recycling & Extrusion Technology

Is ABS Recyclable and How It Is Processed

How Polypropylene Recycling Sets the Grade of the Pellet

Why LDPE Recycling Yields Less Than the Bale Weighs

HDPE vs LDPE vs PP and How to Tell Them Apart on the Line

What Regrind Plastic Is and How Much You Can Blend

Melt Flow Index and What It Tells You About Recycled Resin

What Plastic Granules Are and How Buyers Judge Quality

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