R902

What it is. R902 is a plastic modifier—official category field 'External Lubricant', English category name 'External Lubricant', official one-line description 'Prevents die-lip carbon buildup in extrusion coating and cast films'; mechanism field 'external lubricant modification'—reduces friction and material accumulation in the direction of processing interfaces (die lip / film surface / screw). It is used in processing systems for films and plastic articles such as extrusion coating / cast film: it both improves the state of processing interfaces (in the direction of preventing die-lip carbon buildup) and acts within the system to increase rigidity and toughness, enhance pigment performance, and provide anti-blocking and slip effects. The official full name is verbatim 'Plastic External Lubricant Modifier R902', English name 'External Lubricant R902'. (Data source: product handbook / official product data)

Name and wording at each layer. Technical data page title verbatim 'Plastic Modifier R902'; product catalog line verbatim 'R902: Plastic External Lubricant Modifier, prevents die-lip carbon buildup in extrusion coating and cast films, fluorescent masterbatch, anti-stick screw, etc.'; company profile list sentence verbatim 'Plastic External Lubricant Modifier (extrusion coating, cast film): R902'; official website list title 'Plastic Modifier (fluorine-free PPA alternative)'; detail page main title 'Plastic Modifier · Fluorine-free PPA', subtitle 'Environmentally friendly fluorine-free PPA alternative · Highly active silicon compound'. (Data source: product handbook / official product data)

What problem it solves. Two typical pain points: first, the direction of die-lip carbon buildup and surface defects—the official one-line description is 'Prevents die-lip carbon buildup in extrusion coating and cast films'; second, compatibility with pigment and filler systems—records state that it can increase pigment heat resistance, reduce pigment exudation (effective for slight exudation), improve pearlescent / fluorescent pigment dispersion, and assist hydrophobing agents in increasing hydrophobic performance; it also acts in resin systems to increase rigidity and toughness and provide anti-blocking and slip effects (see Sections 2 and 5 in the source). (Data source: product handbook / official product data)

Official fields and series coordinates. Four official application tags: extrusion coating, cast film, fluorescent masterbatch, anti-stick screw; main component field 'silicon compound'; dosage field '0.5%—5% of the final plastic product'. R902 is included in the comprehensive series (position 10 in the official website product list); official application domain data places it in the 'color masterbatch pigments' domain and the 'film packaging' domain (the domain term source note includes 'R902 (fluorescent masterbatch)'). (Data source: official product data)

What it is not. It is not the masterbatch itself (this product is an additive, not a formulated finished pellet); it is not a resin or filler base material; it is not a model in the hyperdispersant / dispersant direction; nor is it an additive in other functional directions such as flame retardant, anti-fog, or thermal insulation. The adjacent numbers R900 / R900A are independent products and should not be associated by number (for the boundaries of the three grades, see Section 6). (Data source: product handbook / official product data)

Data boundaries (stated first). The documentation for this grade provides an overview, main functions, application fields, physicochemical properties, dosage, packaging and storage; it does not provide a processing temperature window, dedicated experimental data or curves, or measured production-line or article data, and shelf life and safety data (MSDS-type) are also not listed. The values below are all values recorded in the documentation, not a performance commitment for any specific article; items not given in the documentation are uniformly written as 'not listed'. (Data source: product handbook / official product data)

Overview sentence (verbatim). 'Plastic modifier R902 (fluorine-free product), when incorporated into extrusion coating or agricultural film products: it can increase pigment heat resistance by 4 to 5 degrees, reduce die-lip carbon buildup, and reduce pigment exudation (effective for slight exudation), improve pearlescent pigment and fluorescent pigment dispersion, and assist hydrophobing agents in increasing hydrophobic performance. When incorporated into PP, PE, ABS, PS, PA and other products: it can increase product rigidity without changing toughness (generally used as a rigidity/toughness-increasing agent). With erucamide, it can serve as an anti-blocking and slip agent for PE, PP, PA, EVA, POE and other films.' (Data source: product handbook / official product data)

Composition and form. Main component verbatim 'silicon compound'—the official entry writes the detail page system as 'highly active silicon compound (fluorine-free system)'; appearance 'white powder'. (Data source: product handbook / official product data)

Mechanism (official layer). The official mechanism field is 'external lubricant modification'—defining the function at processing interfaces: in the direction of reducing friction and material accumulation between the melt and processing components (die lip / screw, etc.). (Data source: official product data)

Mechanism (four items in the handbook's 'Main Functions'). First, defining the problem: 'Prevent the blocking problem of plastic films caused by vacuum adsorption, intermolecular forces, or thermal motion.' Second, reducing blocking: 'Reduce blocking: form a microscopic uneven structure or lubricating layer on the film surface to reduce interlayer friction and adhesion.' Third, improving processing: 'Improve processing performance: improve the melt fluidity of polyolefin resins (such as PE, PP), reduce die-lip material accumulation, and increase production efficiency.' Fourth, improving film surface: 'Improve film quality: reduce surface defects (such as gels and shark skin), and enhance the smoothness and transparency of the film.' (Data source: product handbook)

Mechanism (detail page comparison layer). The official detail page uses the theme 'Extruded film surface comparison: shark skin / carbon buildup vs smooth, high surface finish' for a toggle comparison: the defect side is labeled 'Conventional fluorine-containing / no additive · shark skin · gels · die-lip carbon buildup', button 'Conventional defect film'; the treated side is labeled 'R902 fluorine-free PPA · smooth, high surface finish · no carbon buildup · no gels', button 'R902 smooth film'; the page has four badges '100% PFAS Free / eliminates die-lip carbon buildup / eliminates shark skin and gels / rigidity- and toughness-modifying'; the specification footnote is 'non-migrating · no blooming · no effect on subsequent printing and lamination'; the step card gives path statements such as 'significantly reduces frictional resistance between the melt and metal die head, reduces extrusion pressure, and lowers main machine current'—this layer is a page-based comparison illustration (toggle comparison), not measured images / data. (Data source: official product data)

Effect statements (as stated in the documentation). The seven items—pigment heat resistance, reduction of die-lip carbon buildup, pigment exudation (effective for slight exudation), pearlescent / fluorescent pigment dispersion, auxiliary hydrophobing, rigidity/toughness increase, and anti-blocking and slip—are all without attached experimental conditions and are not commitments to article performance. (Data source: product handbook / official product data)

The technical data page for this grade, 'Physicochemical Properties', is reproduced verbatim as follows:

Reading notes (three items). Item 1, the form is a powder—white powder; feeding and metering are handled as a powder additive. Item 2, the detail-page interpreted values are not new values: 140 ± 25 m²/g, approx. 980 g/L, etc. are alternative renderings of the same values. Item 3, numbers in the presentation layer are not acceptance specifications: the readings in the table above and on the detail page are for grade selection comparison and incoming-material checking; production should be based on the technical documents supplied with the goods. (Data source: product handbook / official product data)

For R902, the dosage basis is a single basis and a single denominator: the denominator is 'plastic end product'—that is, R902's share in the plastic end product as a whole. (Data source: product handbook / official product data)

Three points must be made clear. Point 1, denominators cannot be converted across layers: R902 is calculated on a 'plastic end product' basis; the dosage denominator for the adjacent-number grade R900 is 'powder' (added at 0.2-1.5% of the total powder weight with appropriate fineness), while R900A, although it also bears the wording 'plastic end product,' has a value of 1%—10% and belongs to another product line—values for the three grades must not be transferred or converted between each other. Point 2, the range is a record in the materials, not a commitment: experimental conditions are not attached, and the actual value depends on the system, process, and substrate requirements; follow the detail-page footnote 'adjust in small trials.' Point 3, direction clause: none—the materials for this grade contain no thickness-dosage direction clause, so do not write a direction and do not apply direction conclusions from other grades. (Data source: product handbook / official product data)

The above are values recorded in the materials; for actual production, please conduct small-trial confirmation in combination with your own system and process. (Data source: product handbook / official product data)

Three use paths. Path 1, extrusion coating / agricultural film direction: 'Added internally to extrusion coating or agricultural film products: it can increase pigment heat resistance by 4 to 5 degrees, reduce die-mouth carbon buildup, and reduce pigment exudation (effective for mild exudation), improve the dispersibility of pearlescent pigments and fluorescent pigments, and assist hydrophobic agents in increasing hydrophobic performance.' Path 2, resin stiffness/toughness enhancement direction: 'Added internally to products such as PP, PE, ABS, PS, and PA: it can increase product rigidity without changing toughness (generally used as a stiffness/toughness enhancer).' Path 3, anti-blocking/slip direction (in a combined system): 'In combination with erucamide, it can serve as an anti-blocking/slip agent for films such as PE, PP, PA, EVA, and POE.'—Erucamide is a combination partner and must not be rewritten into wording such as 'this product alone forms a film.' (Data source: product handbook)

Three use paths

Three use paths. Path 1, extrusion coating / agricultural film direction: 'Added internally to extrusion coating or agricultural film products: it can increase pigment heat resistance by 4 to 5 degrees, reduce die-mouth carbon buildup, and reduce pigment exudation (effective for mild exudation), improve the dispersibility of pearlescent pigments and fluorescent pigments, and assist hydrophobic agents in increasing hydrophobic performance.' Path 2, resin stiffness/toughness enhancement direction: 'Added internally to products such as PP, PE, ABS, PS, and PA: it can increase product rigidity without changing toughness (generally used as a stiffness/toughness enhancer).' Path 3, anti-blocking/slip direction (in a combined system): 'In combination with erucamide, it can serve as an anti-blocking/slip agent for films such as PE, PP, PA, EVA, and POE.'—Erucamide is a combination partner and must not be rewritten into wording such as 'this product alone forms a film.' (Data source: product handbook)

Four application areas

'Packaging films: such as BOPP, CPP, LDPE, and other films for food and pharmaceutical packaging.' 'Industrial films: such as agricultural films, protective films, etc.' 'Other plastic products: such as pipes, fibers, sheets, etc.' 'Especially suitable for film production requiring high transparency and high smoothness.' (Data source: product handbook)

Official application list and domain coordinates

The official application tags, item by item, are: extrusion coating, cast film, fluorescent masterbatch, anti-stick screw; the official application domain data places R902 in the 'color masterbatch pigment' domain and the 'film packaging' domain (the domain internal term source note includes 'R902 (fluorescent masterbatch)'). (Data source: official product data)

Resin side two layers coexist (reproduced verbatim, not mutually revised)

Handbook-layer resin list: PP, PE, ABS, PS, PA (stiffness/toughness enhancement direction); PE, PP, PA, EVA, POE (anti-blocking/slip direction). The detail-page layer additionally has a display wording: PE / PP / PA / PET / PC / TPU / PS / ABS / EVA / POE / glass fiber modified system—including wording not listed in the handbook layer; both layers coexist, and verification in the plant's own system shall prevail. (Data source: product handbook / official product data)

Boundaries (two items)

1. Functional direction boundary: R902 covers external lubrication modification, anti-blocking/opening, stiffness/toughness enhancement, and pigment heat resistance directions; these are not the same as flame retardancy, anti-fogging, thermal insulation, etc., cannot substitute for one another, and are not to be compared as equivalent. 2. Relationship with the masterbatch line: the materials do not establish an 'internal use' phrasing or mapping between R902 and any masterbatch grade, and calculations are not made according to a masterbatch-additive correspondence. (Data source: product handbook / official product data)

Field issues & application examples (as recorded in the source material)

At positions with similar numbering, the documentation also has two models, R900 and R900A. The three numbers are three independent products: each has an independent name, technical data page, and item; the documentation does not write the three as parent-child codes, upgrades, or substitutes, so the category, composition, form, dosage, and application direction of the three grades must be read item by item, and values must not be copied from one another or specifications applied across them. Special note: R902 is not a suffix subcode of R900 / R900A. (Data source: product handbook / official product data)

Reading note: The comparison only explains each item's documentation positioning and intended use; values for different models must not be applied interchangeably; identification should be based on the official full name and category field. (Data source: product handbook / official product data)

The following points are taken item by item from the documentation; items not listed in the documentation are not inferred.

The data on this page come from two types of documentation and can be traced item by item:

• The facts on this page come from two traceable sources: the product handbook and official product data (product item fields, detail page copy, product list, application domain data).
• Specifications, dosage, and packaging/storage clauses are transcribed verbatim from the original text; where the same value is written differently, it is retained by layer without unified rewriting; original wording in quotations is transcribed without change.
• This page is strictly isolated from the similarly numbered R900 / R900A: the values of the two grades are used only in Section 6 for boundary comparison, with the source model named at each point; R902's composition, specifications, dosage, and applications are all taken from this model's own documentation.
• Items not provided by the documentation (processing temperature window, experimental data, curves, production-line measurements, shelf life, MSDS-type information) are truthfully marked in the main text; no numbers, mechanisms, or effect descriptions unsupported by the documentation have been used.

Not covered by the source material (not written on this page — to be added later)

• The wording 'PPA replacement': the official website list title 'Plastic modifier (fluorine-free PPA replacement)' contains this wording; 'fluorine-free' has a source (the overview parenthetical note 'fluorine-free product'), but 'PPA replacement' has no identical corresponding wording in other documentation for this model—transcribe by layer without judging right or wrong; it is recommended to verify against the official wording before publication.
• Fluorine specification layer: the detail page's '100% free of perfluorinated and organic fluorine (PFAS Free)' and 'food-contact grade' are presentation-layer statements, and test methods and reports are not attached; reconciliation is subject to the technical documents supplied with the shipment.
• Wording differences: specific surface area has three-layer wording (140 +25㎡/g / 140+25㎡/g / 140 ± 25 m²/g); 'Sio content' and 'SiO₂ content'; 'Wt•%' and 'Wt.%'; and the original typographic character '’' coexist—transcribe by layer without changing one another.
• Resin scope has two layers coexisting: the handbook layer (PP, PE, ABS, PS, PA / PE, PP, PA, EVA, POE) and the detail page layer (including PET / PC / TPU / glass fiber modified systems)—no unified rewriting was performed.
• Not provided by the documentation: processing temperature window, dedicated experimental data and curves, actual product measurements, shelf life, safety data (MSDS type).
• This model has no thickness-dosage direction clause available for verification; it is a single code (no suffix variants); it has no corresponding relationship with the masterbatch line.