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China PE Sintered Products Factory - Non-Toxic, High-Performance Suppliers for Fluid Absorption Solutions
Product Description
The application of PE sintered products in the field of life includes the following categories:
First Category
Fragrance absorbing tablets, aromatherapy sticks, water-absorbing rings, and fragrance-diffusing balls
Second Category
Painted pen tips
Third Category
Aquarium foamers
Fourth Category
Flowerpot water-absorbing sticks / Support frame
Fifth Category
Liquid mosquito coil
Sixth Category
Headset/microphone filter element
Seventh Category
Coffee machine filter element
Eighth Category
Sweeper filter element
Production Process
The plastic sintering process is primarily divided into four stages: raw material processing, molding, sintering, and post-processing:
1
Raw Material Preparation and Mixing
Material Selection: 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.
Additive Formulation: Lubricants (e.g., zinc stearate), plasticizers, or reinforcing fibers (e.g., glass fibers) are added to improve flowability and final performance.
Mixing Uniformity: The mixture is thoroughly blended using a ball mill or vertical mixer to ensure consistent distribution of components.
2
Forming Process
Compression molding: 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).
Injection molding: Mix the powder with a binder and inject it into a mold, suitable for complex structures (e.g., comb teeth, medical device components).
3
Sintering Process
Debinding Process: If a binder is used, it must be heated at 300–500°C to remove organic components.
High-Temperature Sintering: 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.
Cooling and shaping: Slow cooling (≤5°C/min) to prevent internal stress cracking.
4
Post-processing and Quality Inspection
Machining: Cutting, grinding, or drilling to meet dimensional accuracy requirements.
Surface treatment: Coating (anti-soiling) or polishing to enhance aesthetics.
Performance testing: 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 | 더 | 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
What are the main applications of PE sintered products in daily life?
PE sintered products are widely used in household and personal care applications. Key categories include fragrance absorbing tablets, aromatherapy sticks, painted pen tips, aquarium foamers, flowerpot water-absorbing sticks, liquid mosquito coils, headset/microphone filter elements, coffee machine filter elements, and sweeper filter elements.
What materials are typically used in the plastic sintering process?
Commonly used plastics include polyethylene (PE), polypropylene (PP), and polytetrafluoroethylene (PTFE). These raw materials must be finely ground into powder form with a particle size range of 10 to 200 microns to ensure optimal sintering density and quality.
How is the forming stage of the production process carried out?
The forming stage utilizes two primary methods: Compression Molding and Injection Molding. Compression molding applies 20–100 MPa of cold pressure to shape simple geometries like filter cores. Injection molding mixes the plastic powder with binders to form complex structures like medical device components.
What is the significance of temperature control during high-temperature sintering?
Temperature control is critical to prevent the plastic from melting completely. Sintering is conducted just below the material's melting point to allow particle diffusion. Additionally, a slow cooling rate of ≤5°C/min is maintained to prevent internal stress cracking in the finished product.
Are there standard sizes available for PE fragrance tablets?
Yes, there are numerous existing specifications for PE fragrance tablets. Dimensions vary widely, with outer diameters (OD) ranging from 12mm up to 80mm, and inner diameters (ID) and thicknesses tailored to specific product requirements. Custom sizing is also possible through precision machining.