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China PE Sintered Products Factory: High-Quality Suppliers of Uniform Pore Size Tablets for Industrial Use
Product Description
The application of PE sintered products in the field of life, the First category: fragrance absorbing tablets, aroma.therapy sticks, water-absorbing rings, and fragrance-diffusing balls; the Second category: painted pen tips; The third category: aquarium foamers; The 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 | 0.5 | 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 | 38 | 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 (FAQ)
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, water-absorbing rings, fragrance-diffusing balls, painted pen tips, aquarium foamers, flowerpot water-absorbing sticks/support frames, liquid mosquito coils, headset/microphone filter elements, coffee machine filter elements, and sweeper filter elements.
What raw materials are used in the plastic sintering process?
The process typically utilizes plastics like polyethylene (PE), polypropylene (PP), and polytetrafluoroethylene (PTFE), ground into a fine powder with a particle size of 10 to 200 microns. Additives such as lubricants (e.g., zinc stearate), plasticizers, or reinforcing glass fibers are often formulated to enhance processability.
How are PE sintered products molded into shape?
Molding is primarily done through two methods: Compression Molding, which cold-presses mixed powder in a mold under 20–100 MPa pressure for simple shapes (like filters and cutting boards); and Injection Molding, which mixes the powder with a binder to inject it into molds for complex structures.
What temperature is required for high-temperature plastic sintering?
Sintering is conducted just below the plastic's melting point (for example, approximately 380°C for PTFE) to bind the particles via diffusion without fully melting them. If organic binders are used, a preliminary debinding step is performed at 300–500°C.
How is the quality of sintered plastic products verified?
Quality inspection involves testing for structural porosity, hardness testing according to ASTM D785 standards, and chemical resistance evaluations (such as acid-base immersion tests) to ensure the product meets functional requirements.
Are there customized specifications for PE fragrance tablets?
Yes, PE fragrance tablets are available in a wide range of standard dimensions, with Outer Diameters (OD) ranging from 12mm to 80mm, and Inner Diameters (ID) and thicknesses configured to match specific product requirements.