 |
Barrier layers and Coatings
General issues
- effect on reclaiming process
- effect of bottle manufacture/appearance/performance
- effect of staple fiber manufacture/appearance/ performance
- effect of sheet, film & pipe (HDPE) manufacture/appearance/performance,
- effect on engineering resins manufacture/performance,
- effect of strapping manufacture (including solid stating) or appearance or performance
- effect on depolymerization efficiency or quality
Specific issues
- Where on the bottle will the layer/coating be?
- Do layers readily delaminate and then separate from HDPE or PET?
- Effect on grinding efficiency?
- Effect of barrier material on increased flake loss in elutriation?
- Effect of barrier material on “static cling” issue?
- Effect of residual barrier material (how much to cause an effect) on
- Color in melted resin
- Haze and black specks for PET, black specks in HDPE
- ESC for HDPE
- Melting point
- Crystallization temperature and rate for PET
- Fuming during extrusion
- Excessive filter blinding and screen pack life
- Bottle making for PET and HDPE (extrusion, viscosity, reheat, melt strength)
- Spinning, drafting, and dyeing for PET. Also tenacity, shrinkage, and fluorescence
- Sheet making for PET and HDPE (color, gels, impact strength changes, tear strength, tensile modulus, pin holes, black speck occurrence, surface defects)
- Solid stating rate for PET
- Tensile, flexural, and impact properties for HDPE and PET
- Food contact compliance
- Deposits and plate out on dies, pins, and molds
Scavengers
General issues
- effect on reclaiming process
- effect of bottle manufacture/appearance/performance
- effect of staple fiber manufacture/appearance/ performance
- effect of sheet, film & pipe (HDPE) manufacture/appearance/performance,
- effect on engineering resins manufacture/performance,
- effect of strapping manufacture (including solid stating) or appearance or performance
- effect on depolymerization efficiency or quality
Specific issues
- Smoking during extrusion?
- Effect of residual barrier material (how much to cause an effect), both fresh and aged scavenger, on
- Color in melted resin
- Haze and black specks for PET, black specks in HDPE
- ESC for HDPE
- Crystallization temperature and rate for PET
- Bottle making for PET and HDPE (extrusion, viscosity, reheat, melt strength, tensile and impact properties)
- Spinning, drafting, and dyeing for PET. Also tenacity, shrinkage, and fluorescence
- Sheet making for PET and HDPE (color, gels, impact strength changes, tear strength, tensile modulus, pin holes, black speck occurrence, surface defects)
- Solid stating rate for PET
- Tensile, flexural, and impact properties for HDPE and PET
- Screen pack life
- Food contact compliance
- Deposits and plate out on dies, pins, and molds
Colored bottles, including non-standard colors and treatments
General issues
- effect on reclaiming process, primarily the impact of yield, sorting efficiency, and sorting costs.
- effect of bottle manufacture/appearance/performance
- effect of staple fiber manufacture/appearance/ performance
- effect of sheet, film & pipe (HDPE) manufacture/appearance/performance,
- effect on engineering resins manufacture/performance,
- effect of strapping manufacture (including solid stating) or appearance or performance
- effect on depolymerization efficiency or quality
Specific issues
- Effects on
- Color of natural resin
- Smoking or bubbles during extrusion
- Haze and black specks for PET, black specks in HDPE
- ESC for HDPE
- Crystallization temperature and rate for PET
- Bottle making for PET and HDPE (extrusion, viscosity, reheat, melt strength, tensile and impact properties)
- Spinning, drafting, and dyeing for PET. Also tenacity, shrinkage, and fluorescence
- Sheet making for PET and HDPE (color, gels, impact strength changes, tear strength, tensile modulus, pin holes, black speck occurrence, surface defects)
- Solid stating rate for PET
- Tensile, flexural, and impact properties for HDPE and PET
- Screen pack life
- Deposits and plate out on dies, pins, and molds
- Food contact compliance
Pressure Sensitive Labels
General issues
- effect on reclaiming process
- effect of bottle manufacture/appearance/performance
- effect of staple fiber manufacture/appearance/ performance
- effect of sheet, film & pipe (HDPE) manufacture/appearance/performance,
- effect on engineering resins manufacture/performance,
- effect of strapping manufacture (including solid stating) or appearance or performance
- effect on depolymerization efficiency or quality
Specific issues
- Do labels readily separate from HDPE or PET?
- Effect on grinding?
- Effect of label material on increased flake loss in elutriation?
- Effect of label material on “static cling” issue
- Effect on dryer operation, i.e., melting point
- Effect of PS adhesives in wash tank, forming sticky globs
- Effect of residual label material (how much) on
- Color (natural PET), from label or adhesives or inks
- Smoking or bubbles during extrusion
- Haze for PET, black specks for HDPE and PET
- ESC for HDPE
- Crystallization temperature and rate for PET
- Bottle making for PET and HDPE (extrusion, viscosity, reheat, melt strength, tensile and impact properties)
- Spinning, drafting, and dyeing for PET. Also tenacity, shrinkage, and fluorescence
- Sheet making for PET and HDPE (color, gels, impact strength changes, tear strength, tensile modulus, pin holes, black speck occurrence, surface defects)
- Solid stating rate for PET
- Tensile, flexural, and impact properties for HDPE and PET
- Screen pack life
- Deposits and plate out on dies, pins, and molds
- “Bleeding label” inks
- Food contact compliance
Shrink Sleeve Labels
General issues
- effect on reclaiming process
- effect of bottle manufacture/appearance/performance
- effect of staple fiber manufacture/appearance/ performance
- effect of sheet, film & pipe (HDPE) manufacture/appearance/performance,
- effect on engineering resins manufacture/performance,
- effect of strapping manufacture (including solid stating) or appearance or performance
- effect on depolymerization efficiency or quality
Specific issues
- Do labels readily separate from HDPE or PET flakes? What impedes separation?
- Effect on grinding? Effect of grinding technique on separation?
- Effect of label material on increased flake loss in elutriation?
- Effect of label material on “static cling” issue
- Effect on dryer operation, i.e. melting point.
- Effect of residual label material (how much) on
- Color (natural PET), from label or inks
- Smoking or bubbles during extrusion
- Haze for PET, black specks for HDPE and PET
- ESC for HDPE
- Crystallization temperature and rate for PET
- Bottle making for PET and HDPE (extrusion, viscosity, reheat, melt strength, tensile and impact properties)
- Spinning, drafting, and dyeing for PET. Also tenacity, shrinkage, and fluorescence
- Sheet making for PET and HDPE (color, gels, impact strength changes, tear strength, tensile modulus, pin holes, black speck occurrence, surface defects)
- Solid stating rate for PET
- Tensile, flexural, and impact properties for HDPE and PET
- Screen pack life
- Deposits and plate out on dies, pins, and molds
- “Bleeding label” inks
- Food contact compliance
Variant Polymer Composition
General issues
- effect on reclaiming process
- effect of bottle manufacture/appearance/performance
- effect of staple fiber manufacture/appearance/ performance
- effect of sheet, film & pipe (HDPE) manufacture/appearance/performance,
- effect on engineering resins manufacture/performance,
- effect of strapping manufacture (including solid stating) or appearance or performance
- effect on depolymerization efficiency or quality
Specific issues
- Does variant change sink/float behavior of PET or HDPE?
- Effect of variant material on dryer operation
- Effect of variant material on extrusion operation
- Effect of significant amounts of variant material (how much) on
- Color in melted resin
- Haze and black specks for PET, black specks in HDPE
- ESC for HDPE
- Melting point
- Crystallization temperature and rate for PET
- Bottle making for PET and HDPE (extrusion, viscosity, reheat, melt strength, tensile and impact properties)
- Spinning, drafting, and dyeing for PET. Also tenacity, shrinkage, and fluorescence
- Sheet making for PET and HDPE (color, gels, impact strength changes, tear strength, tensile modulus, pin holes, black speck occurrence, surface defects)
- Solid stating rate for PET
- Tensile, flexural, and impact properties for HDPE and PET
- Screen pack life
- Deposits and plate out on dies, pins, and molds
- Food contact compliance
|
|
