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 |
| Surface Finish | Smooth |
PP sheets possess significant non-toxic and harmless characteristics. Their raw material is polypropylene resin, which itself is a food-grade safe material. No toxic or harmful additives need to be added during the production process, ensuring the safety of the sheets from the source. Under normal conditions, PP sheets will not release any toxic gases or harmful substances. Even when in direct contact with water, food, medicines, etc., there will be no migration of chemical substances, meeting relevant hygiene and safety standards.
PP material has a stable molecular structure. It is not easy to decompose harmful substances under normal temperature and general usage conditions, nor does it easily react with ingredients such as acids, alkalis, and oils in food, thus effectively preventing food from being contaminated.
Our PP sheets can withstand temperatures ranging from approximately -20℃ to 120℃. They can be used for packaging refrigerated food and are also suitable for short-term heating in microwave ovens, making it highly practical. The molecular structure of PP material is dense with low air permeability, which can effectively block water and moisture, preventing food from getting damp and deteriorating. It is especially suitable for packaging moisture-sensitive foods such as biscuits, grains, and tea. Moreover, PP material has good impact resistance and toughness, is not easy to break, and can withstand a certain degree of extrusion and collision, protecting food from damage during transportation and storage.
This characteristic brings many advantages to PP sheets. In the field of food processing, they can be used to make food conveying pipelines, linings of storage containers, etc., to ensure that food is not contaminated. In the pharmaceutical industry, they are suitable for pharmaceutical packaging materials, medical device trays, etc., meeting the strict requirements of sterility and non-toxicity. In daily life, they can be used as children's toy parts, home decoration materials, etc., providing people with a safe and reliable living environment. In addition, because they are non-toxic and harmless, they will not cause secondary pollution to the environment when recycled after being discarded, which is in line with the concept of environmental protection and further expands their application range.
According to the materials and features, the PP boards could be subdivided into:
| 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 |
