Post on 18-Feb-2017
transcript
Highlight of Coloring PlAstics
Jelliarko Palgunadi & Nono SoetedjoHolland Colours Asia
06.27.2014
Outline
HCA – a BRIEF Pigments & Dyes Basic Principles of Plastics Coloration HCA Products Portfolio
Holland Colours Profile Founded in 1979 Over 400 employees Listed at Euronext Stock Exchanges 11% employee owned 6 Plants, 4 Sales Offices World wide network of distributors 2000 Customers in 70 Countries ISO certified (9001, 14001), OHSAS
Focus markets: Packaging Building and Construction Silicones/Elastomers
Holland Colours Profile
HC Worldwide
Profile
Pigments & DyesPigmentsInsoluble particles in a polymer solution (little affinity to the substrate)Inorganic (synthetic & natural): Manganese Violet, Cobalt Blue, Ultramarine
Blue, Chrome Yellow, Nickel Titanate, Chrome Oxide Green, Molybdate Orange, TiO2, Iron oxide, pearlescent pigments, Al/bronze powder, etc.
Organic (synthetic): Carbazol Violet, Di-azocondensate, Isoindoline, Perylene, Quinacridones, Pthalocyanine, Diarylide, Indigo anthraquinones, Mono-azo, etc.
DyesSoluble organic substances in a polymer solution (affinity with the substrate)Acid, basic, mordant, direct, vat, reactive, disperse dyes, etc.
Pigments & Dyes
Color strength Fastness (light, weather, heat, chemical, etc.) Compatibility (migration) Health & safety compliance Price
Principles for colorant selection
Color Strength Inorganic < Organic/dyeHeat stability Inorganic > Organic/dyeWeather resistance Inorganic > Organic/dyeLight fastness Inorganic > Organic/dye
Generally speaking
Principles for colorant selection
Some facts of inorganic pigments Easy to disperse (relatively little work to break down the pigment) Good to excellent heat & weather resistance (suitable for outdoor) Produce opaque color Little, if any, reactivity (some TiO2 grades may degrade PC, synt. Fe2O3
may degrade PVC, ultramarine is acid/base sensitive) Some containing heavy metals (Co, Cd, Cr, Mo, Ni) are not food
contact Abrasive No migration
Pigments & Dyes
Some facts of organic pigments Typically 10-20 times higher strength than that of inorganic pigments Relatively Lower heat, light & weather resistance (except i.e., perylene pigment) Less opaque due to smaller particle size Relatively difficult to disperse due to lipophilic nature Some does not meet safety and health compliance (i.e., diarylides) Relatively more expensive but sometimes more cost effective Potential reactivity with the resin (i.e., carbonyl group on pigment may react with
polyamide resulting in discoloration, phthalo blues are slightly soluble in styrenics and may lead to color control problems, all phthalo pigments may act as nucleators in crystalline resins - leading to uncontrolled shrinkage and warpage - and must be used with care in crystalline materials)
Principles for colorant selection
Pigments & Dyes
General comparison of inorganic vs organic
Pigments & Dyes
Some facts of dyes Moderate to very soluble in the plastics Excellent color strength Produce transparent color Lower heat, light & weather resistance Ease of dispersion Extremely limited in semi-crystalline polymers & plasticized PVC
(migration) Moderately to very compatible with engineering plastics (PET, ABS,
PS, polyamide, etc) Some may react with & degrade the polymer (i.e., SY 163 with PC) Many are not food contact due to migration issue
Principles for colorant selection
Pigments & Dyes
Basic Principles of Plastic ColorationPowdered pigments are formed in production as tiny particles (so-called “primary particles”) which have a high tendency to agglomerate.
Effect of agglomeration: Variation in color shade & intensity Local overconcentration Spots/specks Surface defects Cracks Rapid clogging of filters & spinnerets
(fiber manufacturing), etc.
Light interacts with an object Color perception
Basic Principles
Size is everything
Basic Principles
Weaker color Stronger color
A dispersion:is defined to be the ultimate state of homogeneous suspension of one phase with another.
4 Basic principles of dispersion Wetting Separation of agglomerates Distribution in the melt Stabilization from re-agglomeration
Basic Principles
Color yield = f(pigment size, distribution)
Reflected light on agglomerated (a) & on separated pigments (b).Color strength of (b) > (a)
Effect of dispersion on light reflection
Basic Principles
Basic Principles
Effect of dispersant on distribution & color
Wetting/DispersionPigment aggregates/agglomerates are wetted by the carrier and are broken down into smaller particles (primary particles) as a result of high shear forces.
StabilizationThe carrier system stabilize the dispersion and prevents any tiny particles of pigment from reagglomerating as well as it prevents local overconcentration.
HomogenizationThe suitable selected carrier/dispersant helps pigments particle to be distributed homogeneously throughout the plastic resin.
Basic Principles
Pigment dispersion in non-polymeric carriersHolcobatch, Holcoprill
Liquid dispersionHolcoPET
Basic pigmentsHolcolan, Holcolor
Resin-based masterbatchHolcomaster
HCA Product Porfolio for PlasticsFeatures Optimized processability Economy of colouring Optimal productivity Global uniformity of
production
HOLCOBATCH Minibead pellets (pigment+carrier+additives)
Low melting point (85°C)
Excellent compatibility with various polymers
0.5-1.0mm bead size
Clean, free flowing
Great statistical distribution
High pigmentation & dispersion
Transparent, opaque colours
Special effects colours
Products Porfolio
HOLCOPRILL Low melting point (85°C)
Excellent compatibility with various polymers
2.0-3.0mm bead size
Clean, free flowing
Great statistical distribution
Very high pigmentation
Excellent dispersion
Wide compatibility
Opaque colors
Products Porfolio
HOLCOPET
Liquid colorant
Synthetic carrier system
Excellent compatibility with PET
Excellent dispersion
Mostly suitable at low dosage
No sticking, no burning & cleans!
Products Porfolio
HOLCOMASTER
Clean, free flowing MBC
Excellent compatibility with the application resin
Customizable
1.0-1.5mm pellet size
Optimum pigmentation & dispersion
Opaque colors
Reduction in purging/cleaning costs
Special effects colors
Products Porfolio
HOLCOBATCH vs MASTERBATCH
Faster incorporation into the resin (lower melting point)
Better statistical distribution
Superior dispersion
Higher molding quality at lower dosing rates (gloss, clarity)
Lower cost of coloring
Hydrophobic
Products Porfolio
Applications
etc.
WHY HCA Product performance
Customizable Broad applications Solid & liquid formats
Technical expertise Design (new or existing more functional) To support our products & services To customer’s & their customer’s needs To be their long term partner & advisor
Products Porfolio
Company strengths Quick & accurate color matching
Various applications
Close partnership
Global technical expertise
To be uniqueyou have to be different
Thank You