China PE Sintered Products Suppliers - High-Quality, Non-Toxic, and Chemically Compatible Factory Solutions
Product Description
The application of PE sintered products in the field of life:
Fragrance absorbing tablets, aromatherapy sticks, water-absorbing rings, and fragrance-diffusing balls
Painted pen tips
Aquarium foamers
Flowerpot water-absorbing sticks / Support frame
Liquid mosquito coil
Headset/microphone filter element
Coffee machine filter element
Sweeper filter element
Production Process
The plastic sintering process is primarily divided into four stages: raw material processing, molding, sintering, and post-processing:
Commonly used plastics include polypropylene (PP), polyethylene (PE), and polytetrafluoroethylene (PTFE), which must be ground into powder with a particle size of 10–200 microns.
Lubricants (e.g., zinc stearate), plasticizers, or reinforcing fibers (e.g., glass fibers) are added to improve flowability and final performance.
The mixture is thoroughly blended using a ball mill or vertical mixer to ensure consistent distribution of components.
Fill the mixed powder into a mold and cold-press it into a green body under 20–100 MPa pressure, suitable for simple geometric shapes (e.g., filter cores, cutting boards).
Mix the powder with a binder and inject it into a mold, suitable for complex structures (e.g., comb teeth, medical device components).
If a binder is used, it must be heated at 300–500°C to remove organic components.
Heat and hold below the plastic's melting point (e.g., PTFE at approximately 380°C) to form a dense or porous structure through particle diffusion. Controlling the heating rate (5–10°C/min) and atmosphere (nitrogen protection) is critical.
Slow cooling (≤5°C/min) to prevent internal stress cracking.
Cutting, grinding, or drilling to meet dimensional accuracy requirements.
Coating (anti-soiling) or polishing to enhance aesthetics.
Testing porosity (for porous products), hardness (ASTM D785), and chemical resistance (e.g., acid-base immersion tests).
PE Fragrance Tablets Existing Specification
| OD(mm) | ID(mm) | Thickness (mm) | OD(mm) | ID(mm) | Thickness (mm) | OD(mm) | ID(mm) | Thickness (mm) | ||
|---|---|---|---|---|---|---|---|---|---|---|
| 12 | 4 | 27 | 28 | 11 | 10 | 42 | 16 | 5 | ||
| 15.5 | 8.5 | 10.5 | 30 | 6.5 | 7 | 42 | 20 | 6 | ||
| 17 | 8 | 4.5 | 30 | - | 8 | 42 | 20 | 8 | ||
| 18.5 | 5 | 5 | 30 | 9.5 | 9.5 | 45 | 4 | 8.5 | ||
| 19 | 6.5 | 4 | 30 | 11 | 2 | 45 | 15 | 8 | ||
| 20 | 3 | 5.3 | 30 | 11 | 6.5 | 45 | 25 | 6 | ||
| 20 | 4 | 4 | 30 | 11 | 7.5 | 46 | 35 | 4 | ||
| 20 | 5 | 5 | 30 | 15 | 5 | 46 | 37 | 10 | ||
| 20 | 6 | 5.5 | 30 | 27 | 8 | 47 | 28 | 6.5 | ||
| 20 | 6.5 | 4 | 31 | 7.5 | 5 | 48 | 13 | 5 | ||
| 20 | 7 | 2.6 | 31 | 10 | 6.5 | 48 | 28 | 3 | ||
| 20 | 7.5 | 4 | 31 | 11 | 2.2 | 48 | 33 | 5 | ||
| 20 | 10 | 2.5 | 32 | 12 | 7.5 | 48 | 37 | 3.5 | ||
| 20 | 11 | 6 | 32 | 13 | 8 | 48 | 38 | 12 | ||
| 21 | 7.5 | 5 | 33 | 15 | 5 | 50 | 10.5 | 6 | ||
| 22 | 7.5 | 5 | 33 | 24 | 5 | 50 | 6 | 10 | ||
| 22 | 13.5 | 8 | 34 | 6 | 10 | 50 | 27 | 7.5 | ||
| 22.5 | 12.5 | 5 | 34 | 21 | 4 | 50 | 33 | 5 | ||
| 23 | 7.5 | 5.5 | 35 | 4.5 | 7 | 50 | 36 | 5 | ||
| 24 | 6.5 | 5 | 35 | 5 | 13 | 51 | 15 | 10 | ||
| 24 | 7 | 4.5 | 35 | 6 | 6.5 | 52 | 25 | 7 | ||
| 24 | 9 | 8 | 35 | 9 | .5 | 53 | 45 | 7.5 | ||
| 24 | 9.5 | 4 | 35 | 22 | 4 | 53.5 | 35 | 25 | ||
| 24 | 9.5 | 6 | 35 | 27 | 4 | 54 | 36 | 5.5 | ||
| 26 | 6 | 3.5 | 37 | 7 | 4 | 55 | 25 | 5 | ||
| 26 | 11 | 3 | 26 | 7 | - | 55 | 26 | 12 | ||
| 26 | 12 | 4 | 38 | 6 | 4.5 | 55 | 28 | 5 | ||
| 26.5 | 8 | 5 | 42 | 10 | 5 | 55 | 32 | 4 | ||
| 27 | 7.5 | 7 | 42 | 10 | 9 | 57 | 12.5 | 5 | ||
| 27 | 8 | 5 | 42 | 11.5 | 9.5 | 60 | 10 | 6 | ||
| 27.5 | 4 | 12.5 | 42 | 12 | 5 | 62 | 48 | 11 | ||
| 28 | - | 6 | 42 | 14 | 6 | 62 | 52 | 4.5 | ||
| 28 | 8.5 | 8 | 42 | 15.5 | 10 | 63 | 26 | 6 | ||
| - | - | - | 33 | 13.5 | 4 | 80 | 10 | 60 |
Frequently Asked Questions
Q1: What are the primary applications of PE sintered products in daily life?
PE sintered products are widely used in daily applications, including fragrance absorbing tablets, aromatherapy sticks, aquarium foamers, flowerpot water-absorbing sticks, liquid mosquito coils, and filter elements for coffee machines, headsets, and sweeper vacuums.
Q2: What materials are commonly used in the plastic sintering process?
The process commonly utilizes Polyethylene (PE), Polypropylene (PP), and Polytetrafluoroethylene (PTFE). These plastic raw materials are typically ground into fine powders ranging from 10 to 200 microns in size before processing.
Q3: How does compression molding differ from injection molding in the sintering process?
Compression molding involves cold-pressing mixed powder into simple geometric shapes (like filter cores) under high pressure. Injection molding mixes the powder with a binder to form complex structural shapes (such as medical device components or comb teeth).
Q4: Why is the cooling phase critical during the sintering process?
Controlled slow cooling (typically ≤5°C/min) is essential to prevent internal thermal stress. Proper cooling rates prevent cracking, warping, and structural deformations in the finished sintered plastic parts.
Q5: What quality tests are performed on finished sintered products?
Quality inspections include testing the product's porosity (crucial for filter elements), measuring hardness ratings according to ASTM D785 standards, and conducting chemical resistance tests, such as acid-base immersion evaluations.
Q6: Are customized specifications available for PE fragrance tablets?
Yes, PE fragrance tablets can be manufactured to specific dimensions. Existing specifications range from outer diameters (OD) of 12mm to 80mm, with various inner diameters (ID) and thicknesses to match different product applications.