Polypropylene (PP plastic) is another excellent resin species developed after nylon. It is a linear polymer with high density, no side chains, and high crystallinity, with excellent comprehensive properties. When uncolored, it is white translucent, waxy; lighter than polyethylene. Transparency is also better than polyethylene and harder than polyethylene.
Usually we say that the new PP material can also be said to be the PP material of the woven bag. What is the difference between pp new material and pp recycled material?
The performance difference is as follows:
1. The quality of recycled materials is unstable, contains many impurities, and contains other raw materials.
2. The quality of recycled materials is poor, and the tensile strength and toughness are average.
3. The color of recycled materials is generally not very bright white, and the chroma is generally dark. Like recycled bags with some new materials, the color will be slightly brighter, and the quality, color, and price are also between pure new materials and Between recycled materials.
The specific points are:
1. Unstable. Sometimes the color of this batch is similar to the model. The next batch may have a little problem more or less, that is, each batch of materials cannot be guaranteed to be the same. Therefore, there are so-called minor deviations in the industry, such as normal colors, arts and sciences, and tension, which cannot be avoided.
2. The mechanical properties of the material in the physical properties of recycled materials are worse than new materials. Generally, they can only be used in less demanding occasions or used with new materials to reduce costs.
3. The color of the new material is generally brighter, brighter, and better gloss, while the surface gloss of the old material is relatively poor.
Price difference:
New materials are expensive, recycled materials are cheap
Perspective analysis:
The application range of woven bags is becoming wider and wider, gradually replacing high-cost packaging materials in many fields. Recycled materials have the characteristics of low cost, high consumption, easy production, and good re-creation. Therefore, in industries that do not limit the packaging to be new materials Is widely used.
