Chengdu Xinkunda Plastic Products Co., Ltd.
Chengdu Xinkunda Plastic Products Co., Ltd.
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| Attribute | Value |
|---|---|
| Density | 0.9 g/cm3 |
| Color | White/gray/beige/cyan/blue |
| Thickness | 3-30mm |
| Size | Customized |
| Temperature Resistance | Up to 120°C |
| Weather Resistance | Good |
| Electrical Insulation | High |
| UV Resistance | Good |
| Service Life | up to 10 years |
| Corrosion Resistance | Excellent |
The cost of PP sheets (polypropylene sheets) is closely related to raw material prices, production processes, and specifications. In terms of raw materials, polypropylene resin, as the basic raw material, has a relatively stable price and is lower than that of engineering plastics such as ABS and PVC. The cost per ton is usually 30%-50% lower than that of ABS. In the production process, mature technologies like extrusion and calendering result in low energy consumption, further controlling processing costs. Taking common 3-5mm thick sheets as an example, the unit price per square meter is about 15-40 RMB, which is much lower than that of stainless steel plates (100-300 RMB/㎡) and FRP plates (80-150 RMB/㎡), and only slightly higher than that of ordinary PVC plates (10-30 RMB/㎡), showing a significant cost advantage.
In terms of applications, PP sheets, with the combination of low cost and multiple properties, cover many fields: in the chemical industry, they are used to make storage tanks and pickling tanks, replacing expensive stainless steel equipment; in the construction industry, they serve as waterproof liners and temporary partitions to reduce construction costs; in agriculture, they are used as linings for irrigation channels and breeding ponds, taking into account durability and economy; in household scenarios, they are used to make storage boxes and waterproof baffles, with a cost performance far exceeding that of wooden or metal products. Its cost-effectiveness advantage lies in the balance between "low cost and adaptability", and this advantage is prominent in multi-dimensional scenarios.
The service life of PP sheets is not a fixed value; it is comprehensively affected by the usage environment, application scenarios, and the inherent characteristics of the material, typically ranging from 5 to 15 years.
In indoor dry and non-corrosive environments, such as home storage and office partitions, PP sheets can maintain stable performance, with a service life of 10 to 15 years. In such cases, they mainly face a slight attenuation of long-term mechanical properties, such as a certain degree of aging leading to reduced toughness, but this basically does not affect normal use.
| Characteristic | PP (Polypropylene) | PE (Polyethylene) | PVC (Polyvinyl Chloride) |
|---|---|---|---|
| Density (g/cm³) | 0.89-0.91 | 0.91-0.96 (Higher for HDPE, lower for LDPE) | 1.3-1.45 |
| Appearance | Translucent to opaque, relatively hard surface | Translucent to milky white, soft surface with waxy feel | Transparent to opaque, diverse colors (pigment-addable) |
| Hardness | Medium-high, good rigidity | Low (LDPE) to medium (HDPE), good flexibility | Medium-high (rigid PVC); flexibility of soft PVC is adjustable |
| Impact Resistance | Good at room temperature, brittle at low temperatures | Excellent, especially tough at low temperatures (LDPE better) | Poor for rigid PVC at low temperatures; soft PVC has improved toughness due to plasticizers |
| Tensile Strength (MPa) | 20-40 | 8-30 (Lower for LDPE, higher for HDPE) | 30-50 (rigid PVC), lower for soft PVC |
| Continuous Service Temperature (℃) | 110-120 | -40-80 (About 60 for LDPE, about 100 for HDPE) | -15-60 (rigid PVC), lower for soft PVC (affected by plasticizers) |
| Low-Temperature Resistance | Poor, brittle below 0℃ | Excellent, can withstand below -70℃ (HDPE slightly less cold-resistant) | Poor, easy to harden and crack at low temperatures |
| Vicat Softening Point (℃) | 150 | 105-130 (Higher for HDPE) | 75-90 (rigid PVC) |
| Acid and Alkali Resistance | Excellent, resistant to most acids, alkalis, salts; not resistant to aromatic solvents | Excellent, resistant to acids and alkalis; not resistant to strong oxidants and organic solvents | Resistant to general acids and alkalis; not resistant to concentrated acids, aromatics, and ketones |
| Solvent Resistance | Poor (easily dissolved by aromatics and chlorinated hydrocarbons) | Medium (LDPE more easily swollen by solvents) | Medium (rigid PVC better than soft PVC) |
| Processing Temperature (℃) | 170-220 | 150-200 (Lower for LDPE, higher for HDPE) | 160-190 (requires stabilizers to prevent decomposition) |
| Weldability | Easy to weld, suitable for heat sealing and ultrasonic welding | Easy to weld, LDPE better than HDPE | Rigid PVC weldable; soft PVC poor due to plasticizer migration |
| Molding Methods | Extrusion, injection molding, blow molding, etc. | Extrusion, injection molding, blow molding, film forming, etc. | Extrusion, injection molding, calendering (soft PVC suitable for films, pipes) |
| Insulation | Excellent, low dielectric constant, good high-frequency insulation | Excellent, low dielectric loss, suitable for high-frequency insulation | Good, but rigid PVC better than soft PVC (affected by plasticizers) |
| Toxicity | Non-toxic, meets food contact standards | Non-toxic, meets food contact standards (pure PE) | Rigid PVC itself non-toxic but may contain lead stabilizers; soft PVC contains plasticizers (phthalates may be harmful) |
| Recyclability | Easy to recycle, can be reprocessed | Easy to recycle, HDPE has higher recycling rate than LDPE | Difficult to recycle, recycled material has significant performance degradation |
| Typical Uses | Food packaging, pipes, auto parts, medical devices | Films (plastic bags), containers, pipes, toys | Pipes (drainage), profiles (doors/windows), films, artificial leather |
