1, for plastic woven bags polypropylene (PP) of the test items and methods and standards.
Applicable to propylene or propylene and ethylene polymerization catalyst system and contains additives obtained granular propylene homopolymers or copolymers. This standard does not apply to color, fill, enhance, blend of polypropylene resin and masterbatch granules. Technical requirements.
Polypropylene resin color, cylindrical particles, the particle size in any direction should be 2-5mm, no mechanical impurities.
For health requirements of the polypropylene resin, should be consistent with the provisions of GB9693.
Polypropylene quality indicators should be consistent with the corresponding standards.
2, low-density polyethylene used for plastic bags (LDPE) of the test items and methods and standards.
This standard applies to vinyl monomers, with the radical-type polymerization initiator obtained under high pressure low density polyethylene homopolymer, the content below 5% of the 1 - olefin copolymers and polymers containing additives.
Technical requirements. Milky white low density polyethylene resin cylindrical particles, the particle size in any direction for the 2-5mm, does not allow attachment of metal mechanical impurities.
Low Density Polyethylene Resin should comply with the hygiene requirements of the provisions of GB9691.
Low-density polyethylene resin quality indicators should be consistent with the corresponding standards.
3, for high-density polyethylene plastic bags (HDPE) of the test items and methods and standards.
This standard applies to ethylene or ethylene and 1 - olefin monomer obtained by catalytic polymerization of high-density polyethylene homopolymers or copolymers and polymers containing additives.
This standard does not apply to ultra-high molecular weight high density polyethylene. Technical requirements.
Qualities of high density polyethylene resin as cylindrical or oval-shaped particles, the particle size in any direction should be 2-5mm, is not entrained metal, mechanical impurities.
For standard high-density polyethylene resin should be consistent with the provisions of GB9691.
According to their use of high-density polyethylene resin into extrusion, injection molding and blow three categories.