PP SPUNBOND NONWOVEN FABRIC EQUIPMENT www.hgnonwoven.com Spunbond technology uses preferably thermoplastic polymers with high molecular weight and broad molecular weight distribution such as polypropylene (PP) and polyester (PET). polypropylene is mostly used primarily due to its low price and...Send InquiryChat Now
PP SPUNBOND NONWOVEN FABRIC EQUIPMENT
Spunbond technology uses preferably thermoplastic polymers with high molecular weight and broad molecular weight distribution such as polypropylene (PP) and polyester (PET). polypropylene is mostly used primarily due to its low price and advantageous properties such as low density, chemical resistance, hydrophobicity, sufficient or even better strength. The fibre grade polypropylene (mainly isotactic) is the principal type of polypropylene which is used in spunbond technology. The important raw material parameters for polypropylene to be a suitable candidate for spunbond technology are melt flow index (MFI) of about 20–40 g/10 min and polydispersity ratio (M w/M n) of around 3.5–7.
The molecular weight can be around 180000. On the other hand, the important raw material parameters for polyester are intrinsic viscosity of about 0.64, low share in COOH-groups, high crystallinity, and low water content (as low as 0.004%). Spunbond nonwovens are exclusively made from crystalline polyester. Crystallinity influences pre-drying and extrudability as well as filament drawing orientation, which is basic to make products that meet the requirements and that are of proper strength. Pre-drying is inevitable as PET at thermal strain is subject to hydrolytic degradation when extruded. In addition, low water content avoids air pockets in the melt that might cause filament breakage. Frequently, requirements can only be met by means of polymer modification. Except for the mechanical properties, UV-resistance and flame-retardancy are important with technical applications.
2. GSM Range:10-200gsm
4. Certification: CE/ISO9001
PP NONWOVEN FABRIC MAKING MACHINE SPECIFICATION:
NONWOVEN FABRIC PRODUCTION LINE FLOW CHART:
Raw material----> Melting ----> Filtering ----> Measuring ----> Spinning ----> Cooling ----> Stretching ----> Web forming ----> Calendering ----> Winding ----> Cutting----> Final product