| Material: | Laminated Material |
|---|---|
| Usage: | Packaging Film, Food Cling Film |
| Processing Type: | Multiple Extrusion |
| Transparency: | Transparent |
| Feature: | Moisture Proof |
| Hardness: | Soft |
| Samples: |
|---|
| Customization: |
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Audited Supplier Polyvinyl chloride, referred to as PVC(Polyvinyl chloride), is vinyl chloride monomer (vinyl chloride monomer, referred to as VCM) in peroxide, azo compounds and other initiators; Or under the action of light and heat according to the mechanism of free radical polymerization polymerization polymer. Vinyl chloride homopolymer and vinyl chloride copolymer are called vinyl chloride resin.
PVC is a white powder of amorphous structure, the branching degree is small, the relative density is about 1.4, the glass transition temperature is 77~90 ° C, about 170 ° C begins to decompose, the stability of light and heat is poor, above 100 ° C or after a long time of sunlight exposure, it will decompose and produce hydrogen chloride, and further automatic catalytic decomposition, causing discoloration, physical and mechanical properties are also rapidly declining, In practical applications, stabilizers must be added to improve the stability of heat and light.
The molecular weight of industrial PVC is generally in the range of 50,000 ~ 110,000, and has a large polydispersity, and the molecular weight increases with the decrease of polymerization temperature; Without fixed melting point, 80-85 ºC began to soften, 130ºC into viscoelastic state, 160~180ºC began to change into viscoelastic state; It has good mechanical properties, tensile strength of about 60MPa, impact strength 5~10kJ/m2; It has excellent dielectric properties.
PVC was once the world's largest production of general purpose plastic, the application is very wide. In building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipe, wire and cable, packaging film, bottles, foam materials, sealing materials, fibers and other aspects are widely used.
| Test Items | Quality Index | Test Results | Experiment Method |
| Color particles, pcs/kg | ≤20 | 0 | SH/T 1541.1 |
| Large grain + small grain, g/kg | ≤10 | 0.3 | |
| Melt mass flow rate (2.16kg, 190°C) , g/10min | 0.16-0.24 | 0.19 | GB/T 3682.1 |
| Density (23*C) , g/cm3 | 0.952-0.956 | 0.9546 | GB/T 1033.2 |
| Tensile yield stress, MPa | ≥22.0 | 25.9 | GB/T 1040.2 |
| Tensile nominal strain at break, % | Measured | 825 | |
| Flexural modulus, MPa | ≥800 | 1121 | GB/T 9341 |
| Environmental stress cracking time (F50), h | ≥20 | >35 | GB/T 1842 |
| Yellow index | ≤4.0 | -4.4 | HG/T 3862 |
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