Stop Mixing Plastic Waste! Ultimate Guide to Shredding PET, PP, HDPE for Maximum Profit

"Last month, Boss Wang lost another 150,000 RMB."

In a plastic recycling park in Zhejiang, Lao Wang's business seems booming—the yard is piled high with various plastic scraps, and two crushing lines run day and night. But only he knows the truth: due to mixed materials and improper crushing, the recycled pellets he produces fail to meet purity standards. They sell for nearly 30% less than competitors', and his blade wear rate is double the industry average.

This is not an isolated case. In China, over 60% of plastic recycling companies still rely on the crude "one-machine-crushes-all" model, leading to lost value in recycled materials, accelerated equipment wear, and continuously shrinking profit margins.

 I. Why is "Mixing and Crushing" a Profit Black Hole for the Recycling Industry?

When PET beverage bottles, PP packaging film, and HDPE industrial pipes are indiscriminately fed into the same shredder, problems arise immediately:

1.  Conflicting Material Properties: PET (polyester) is hard and brittle; PP (polypropylene) is flexible and fatigue-resistant; HDPE (high-density polyethylene) is moderately hard but impact-resistant. Mixed crushing results in uneven output particle size—PET turns to powder while HDPE remains in flakes.

2.  Formation of a Contamination Chain: Different plastics have vastly different melting points and flow properties. A small amount of low-melting-point PP (160-170°C) mixed into high-melting-point PET (250-265°C) during pelletizing creates "fish eyes" and weak points, directly downgrading the product.

3.  Simultaneous "Overwork" and "Underutilization" of Equipment: To handle the hardest PET, blades and screens must be configured for maximum strength, leading to inefficiency and energy waste when processing soft film. This "capability mismatch" drastically increases electricity and maintenance costs.

 II. The LESINTOR "Golden Separation" Rule: Three Steps to Multiply Value

 Rule 1: Pre-Sorting, Identify at Source

Key Action: Implement simple, effective preliminary sorting before crushing.

   PET Bottles: High transparency, crisp sound when tapped, typically beverage bottles.

   PP Film: Semi-transparent, soft and flexible, often packaging bags or woven sacks.

   HDPE Pipes: Often milky white or opaque, moderate hardness, shows white marks when bent.

LESINTOR Suggests: Even small-to-medium recycling stations should establish at least three separate feed lines to isolate major categories at the source. Data from our clients shows this single step can improve the purity of subsequent recycled materials by over 50%.

 Rule 2: Dedicated Machines, "Customized" Crushing

Different plastics require different crushing "recipes":

Case Study: A Shandong-based company specializing in HDPE recycling switched to a LESINTOR dedicated crusher. Their blade service life extended from 3 weeks to 3 months, output particle size became uniform, and pelletizing melting efficiency increased by 25%.

 Rule 3: Particle Size Control, Matching Downstream "Appetite"

Downstream pelletizing plants have precise requirements for crushed material size. LESINTOR equipment allows for precise control within a material category via quick screen changes:

   Fine Grinding (3-8mm): Suitable for high-end recycling, color-sensitive products.

   Standard Grinding (8-20mm): Optimal for most pelletizing lines, best flowability.

   Coarse Crushing (20-40mm): Suitable for pre-crushing or further fine processing.

 III. From "Correct Crushing" to "Golden Separation": The LESINTOR Integrated Solution

Correct crushing is not just about size reduction; it lays the groundwork for efficient separation. The LESINTOR "Crushing-Sorting Integration" module is helping leading companies achieve a value leap:

1.  Enhanced Dry Sorting: Material with uniform particle size, processed by dedicated crushers, passes through our integrated air separator, effectively separating film fragments from rigid fragments.

2.  Preparation for Electrostatic Separation: For crushed PET flakes (with labels, caps), uniform particle size is key for subsequent electrostatic removal of impurities.

3.  Intelligent Control: The latest LESINTOR series features an intelligent monitoring system that tracks load and temperature in real-time, automatically adjusting speed and feed for consistent results across batches.

 IV. The Bottom Line: How Specialized Crushing Turns Scrap into "Gold"

Take a mixed plastic recycling plant with a monthly capacity of 300 tons as an example:

"Before, we took in everything and crushed it all together, and couldn't get a good price for any of it," shared a Guangdong-based LESINTOR client. "Processing by material type not only eased equipment strain but made our output highly sought-after by downstream buyers due to its guaranteed purity."

 V. What Crushing Solution Matches Your Material?

Competition in plastic recycling has shifted from "scale wars" to "quality wars." Crushing is no longer just about volume reduction; it's the first precise process determining the value of regeneration.

LESINTOR Provides You With:

1.  Free Material Analysis: Send your material sample or photos for a customized crushing plan.

2.  Pilot Cooperation: Test with smaller equipment—let the data speak.

3.  Full-Process Design: Consultancy for optimizing the entire workflow from sorting and crushing to pre-pelletizing processing.

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Stop Letting Mixed Crushing Devour Your Profits.

Get Your Customized Plastic Efficient Crushing & Value Enhancement Plan.

Visit the LESINTOR official website or scan the QR code to add our technical engineer on WeChat. Reply with the keyword "Golden Separation" to receive:

1.  A Quick Guide to Common Plastic Sorting (Illustrated).

2.  Crushing Configuration Plans & ROI Calculation Sheets for Different Materials.

3.  Appointment for a Free Material Test Crushing Service (Limited Slots).

LESINTOR – More Than Crushing, Committed to Value Release. Let every gram of plastic be reborn in the most suitable way.