Anti-Scratch PP Compounds
Improved Properties with Anti-Scratch Additives
Enhanced Scratch Resistance
- Forms a thin lubricating or flexible surface layer on PP.
- Greatly reduces scratches, marring, nail marks, and light abrasion.
- Minimizes whitening or gloss changes after scratching.
Improved Surface Slip (Lower COF)
- Reduces the surface coefficient of friction.
→ Less damage from friction and surface contact.
→ Helps reduce squeaking or rubbing noise between assembled parts.
Better Weatherability and Durability
- Some anti-scratch agents also provide UV stability,
→ reducing surface roughness caused by aging
→ maintaining long-term surface durability.
Improved Surface Appearance Retention
- Effective on both matte and high-gloss PP grades.
- Even when scratches occur, they are less visible, maintaining premium appearance.
Potential Reduction in Coating Costs
- Reduces the need for protective coatings such as clear-coating or UV-coating.
→ Helps lower overall production cost.
Key Characteristics and Typical Applications
| Products | Components | Applications |
|---|---|---|
| JSPP20TA21 | PP+Talc10%+AS3% | Automotive Interior Parts (Largest Market)
Home Appliance Exterior Parts / Panels
Consumer Products and Daily-Use Items
Office Equipment and Industrial Covers
|
| JSPP20TA41 | PP+Talc20%+AS3% | |
| JSPP20TA61 | PP+Talc30%+AS3% |
Barium Sulfate (BaSO4) Filled Grades
Properties
Increased Specific Gravity
- BaSO₄ has a very high specific gravity (approx. 4.5 g/cm³).
- When added to PP (0.9 g/cm³), it significantly increases the overall density.
→ Enables the production of high-weight consumer goods and parts requiring mass stability.
Improved Dimensional Stability
- Reduces thermal expansion
- Decreases shrinkage and warpage
→ Ideal for precision-molded parts and components requiring deformation control.
Enhanced Rigidity and Surface Strength
- Although impact strength may decrease slightly,
- Rigidity, strength (top-load), and surface hardness improve.
Radiation Shielding
- BaSO₄ provides excellent shielding against X-rays and gamma rays
→ Suitable for medical and radiation-related products.
Improved Surface Gloss
- Its natural whiteness and glossiness enhance the surface finish
→ Produces high-gloss surfaces.
Increased Heat Resistance
- Filler effect improves HDT (Heat Deflection Temperature).
Flowability Adjustment
- Typically decreases MFI (increases viscosity)
→ Suitable for thick-wall products and parts requiring high dimensional stability.
(MFI can be adjusted with other methods if needed.)
Key Characteristics and Typical Applications
| Products | Components | Applications |
|---|---|---|
| JSPP10B2 | PP+BaSO4 10% | Medical and X-ray–related Products
Home Appliance and Automotive Interior Parts
High-Weight Consumer Products (Cosmetic Packaging)
Industrial Components
Construction and Interior Components
PP Films and Sheets
|
| JSPP10B4 | PP+BaSO4 20% | |
| JSPP10B6 | PP+BaSO4 30% | |
| JSPP10B8 | PP+BaSO4 40% | |
| JSPP10B10 | PP+BaSO4 50% |
Expected Properties of PP with 10–50% BaSO₄ Loading and Recommended Applications by Loading Level
Below is a summary of the estimated property changes of polypropylene (PP) when 10% to 50% (wt%) barium sulfate (BaSO₄) is compounded, as well as recommended application areas for each loading level.
Note: These values are approximate and can vary depending on base PP grade, BaSO₄ particle size, surface treatment, dispersion quality, processing conditions, and additional additives such as coupling agents.
Estimated Composite Density (Approximate Values)
(Calculated using volume additivity based on mass fractions)
| BaSO₄ (wt%) | Estimated Density (g/cm³) |
|---|---|
| 10% | 0.98 |
| 20% | 1.08 |
| 30% | 1.19 |
| 40% | 1.33 |
| 50% | 1.51 |
Estimated Mechanical & Thermal Properties
(Baseline PP assumptions: tensile strength 33 MPa, flexural modulus 1.6 GPa, HDT 95°C, impact strength & MFI = relative 100%)
| BaSO₄ (wt%) | Tensile Strength (MPa) | Flexural Modulus (GPa) | HDT (°C) | Impact Strength (relative) | MFI (relative) |
|---|---|---|---|---|---|
| 0% (Neat PP) | 33.0 | 1.60 | 95 | 100% | 100% |
| 10% | 31.3 | 1.92 | 100 | 90% | 90% |
| 20% | 29.7 | 2.24 | 105 | 85% | 85% |
| 30% | 28.1 | 2.72 | 115 | 75% | 75% |
| 40% | 26.4 | 3.20 | 120 | 65% | 70% |
| 50% | 24.8 | 3.68 | 125 | 55% | 60% |
General trends
- Tensile strength: Slight decrease with increasing filler content
- Flexural modulus: Large increase → significant stiffness improvement
- HDT: Improves with higher loading
- Impact strength: Decreases noticeably at high loadings
- MFI: Decreases (viscosity increases), making high-loading grades harder to mold
Recommended Applications by BaSO₄ Loading Level
10 wt% (Light Fill)
- Properties : Slight increase in stiffness, improved surface finish, mild weight increase
- Applications : Small home appliance parts, knobs/buttons, general covers, cosmetic packaging (entry-level premium feel)
20 wt% (Moderate Fill)
- Properties : Noticeable stiffness and HDT improvement, density ≈ 1.08 g/cm³
- Applications : Appliance interior frames, automotive interior clips/covers, precision parts requiring dimensional stability
30 wt% (Standard Industrial Grade)
- Properties: Large increase in rigidity, surface hardness, dimensional stability; density ≈ 1.19 g/cm³
- Applications: Automotive interior components, premium cosmetic cases, industrial machine covers, thick-wall parts, semi-radiation-shielding components
40 wt% (High Fill)
- Properties : Very high rigidity, much heavier feel, excellent surface gloss
- Applications : High-end cosmetic containers (luxury weight), structural covers, parts needing partial X-ray attenuation
50 wt% (Very High Fill)
- Properties : Heavy-weight polymer, strong rigidity, reduced toughness, more difficult to mold
- Applications : X-ray shielding components, medical panels/housings, luxury-weight cosmetic cases, counterweights, balancing components
