R18

R18 belongs to the "toughening low-temperature resistant agent" category (English category name "Toughener"), with the official one-liner "PET/PETG toughening and cold resistance, delayed crystallization", mechanism field "delayed crystallization + toughening", main components "PET delayed crystallization agent, toughening agent, phosphate alcohol ester composite"—its function is defined as toughening, cold resistance, and impact modification in PET / PETG plastic systems. Official summary sentence: "PET/PETG Toughening Low-Temperature Resistant Agent R18 This product is dedicated to the toughening, cold resistance, and impact modification of PET/PETG plastics. It is suitable for application fields such as PET/PETG resin, PET/PETG strapping, drawing, sheet, film fiber, etc., and can significantly increase the notched impact strength of the material and improve low-temperature brittleness." (Data source: product handbook / official product data)

Name and spelling: technical data page title "PET/PETG Toughening Low-Temperature Resistant Agent R18"; product catalog line "R18: PET/PETG Toughening Low-Temperature Resistant Agent"; official full name "PET/PETG Toughening Low-Temperature Resistant Agent R18", English name "PET/PETG Toughener R18". Product positioning can be summarized as: delayed crystallization · improved low-temperature brittleness · increased notched impact strength. (Data source: product handbook / official product data)

Classification and coordinates: at the handbook level, it is listed in the comprehensive series section of the product catalog as a separate line (adjacent to the R410 line above and the R1880 line below); at the official level, it is included in the comprehensive series; the application domains are registered as pipe and sheet domain (the domain note names this grade directly, with a parenthetical note on the PET sheet / strapping direction), injection molding surface domain, and fiber textile domain. (Data source: product handbook / official product data)

What it is not: it is not a dispersant (the similarly named R188 / R1880 / R1848 and R1800-S / R1800-SK / R1800-SH each have their own directions); it is not a flame retardant; it is not a masterbatch / resin / filler itself; nor is it a nucleating agent—the first function of this grade is verbatim "Delayed PET/PETG crystallization: effectively slows down the crystallization rate of PET/PETG materials", following the "delayed crystallization" direction, opposite to the "promoting crystallization" direction of nucleating agents. (Data source: product handbook / official product data)

Data boundaries: the source gives an overview, main components, four physicochemical properties (appearance / melting point / density / solubility), four main functions, addition content, packaging, and storage conditions; it does not list shelf life, transportation, usage method, processing temperature window, safety notes, disclaimer, or test methods. All values on this page are values recorded in the source, not performance claims. (Data source: product handbook / official product data)

• Four main functions (verbatim): Delayed PET/PETG crystallization—effectively slows down the crystallization rate of PET/PETG materials and optimizes processing performance.
• Improved mold release—for PET/PETG materials, improves demolding during molding and reduces mold sticking issues.
• Enhanced toughness—improves the material's impact resistance and flexibility, enhancing the mechanical properties of the article.
• Improved low-temperature resistance—enhances the material's stability in low-temperature environments and avoids issues such as embrittlement caused by low temperatures.
• Form characteristics: at room temperature, white or slightly yellow translucent block, relatively soft with a slippery/greasy feel; melting point 60-80 ℃, density 0.95-0.98.
• Dosage characteristics: 2-4 parts per ten thousand ultra-low addition (recorded in the dosage section note of the detail page).

Composition: the handbook's "main components" are "PET delayed crystallization agent, toughening agent, phosphate alcohol ester composite", and the official main components field is from the same source with the same value—a functional additive characterized by a delayed crystallization agent + toughening agent + phosphate alcohol ester composite. (Data source: product handbook / official product data)

Mechanism reading: the official mechanism field "delayed crystallization + toughening" gives two lines—one is regulation of crystallization behavior (delaying), the other is toughness enhancement. The correspondence between the four functions and the mechanism can be matched item by item—"delayed crystallization" and "enhanced toughness" directly correspond to the two mechanism lines; "improved mold release" and "improved low-temperature resistance" are function list items. In terms of direction, this grade "effectively slows down the crystallization rate of PET/PETG materials" and does not belong to the nucleating direction of "promoting crystallization / increasing crystallinity". (Data source: product handbook / official product data)

Page-based presentation (qualitative schematic, not measured images): the detail page function block contains a "crystallization delay schematic curve"—two comparison lines labeled "unmodified · early crystallization" and "+R18 · delayed crystallization", with the block note verbatim "The delayed crystallization curve is schematic: with +R18 the crystallization onset shifts right, and the processing window is wider"; there is also a low-temperature impact comparison demonstration bench, labeled "−20 ℃ low-temperature environment" and impact direction, with two comparisons: "+R18 · tough bending without breaking · notched impact ↑" and "unmodified · low-temperature brittle fracture · notch cracking". The page does not give impact energy, specimen specifications, test standards, or measured values—this page only writes the clause wording and the page-labeled condition "−20 ℃", and makes no quantitative statement of impact strength. (Data source: official product data)

Performance boundaries: the source uses only qualitative statements—no magnitude of notched impact strength improvement, no lower limit of low-temperature embrittlement temperature, no quantified value for mold release force or crystallization rate, and no numerical processing window width; the detail page's effect curve is self-labeled "schematic". This page does not extrapolate and does not make promises. (Data source: product handbook / official product data)

1. Delayed crystallization — slows down crystallization rate"Delayed PET/PETG crystallization: effectively slows down the crystallization rate of PET/PETG materials and optimizes processing performance"—one of the main mechanism lines (regulation of crystallization behavior).
2. Toughening — improves impact resistance and flexibility"Enhanced toughness: improves the material's impact resistance and flexibility, enhancing the mechanical properties of the article"; official summary sentence: "can significantly increase the notched impact strength of the material".
3. Improved low-temperature brittleness — low-temperature environmental stability"Improved low-temperature resistance: enhances the material's stability in low-temperature environments and avoids issues such as embrittlement caused by low temperatures"; the comparison temperature labeled in the page demonstration is −20 ℃ (page-labeled condition, not a measured value).
4. Mold release improvement — reduces mold sticking"Improved mold release: for PET/PETG materials, improves demolding during molding and reduces mold sticking issues".

The table below summarizes the main components and physicochemical properties of R18 as recorded in the product handbook and official product data. The values in the table are as recorded in the documentation (original notations and units are retained). Before bulk use, small-scale trials are recommended in combination with your own grade and molding process.

Reading notes: ① Melting point 60-80 ℃ is the product's own melting point, not a processing temperature window; ② The solubility statement 'slightly soluble in water, ethanol, benzene, and gasoline' is the verbatim sentence from the handbook layer (including the typographic form with the combined use of the enumeration comma and the conjunction); the official layer reads 'slightly soluble in water, ethanol, benzene, gasoline'—recorded layer by layer, not mutually corrected; ③ Each of the four indicators has only one set of values, with no multiple values coexisting; ④ The values in the table are as recorded in the documentation; before bulk use, small-scale verification is recommended. (Data source: product handbook / official product data)

The dosage is recorded as the same value at three levels (2-4 parts per ten thousand), with differences only in wording and unit presentation; the denominator basis is not stated in the documentation—this page records the range verbatim, marks it explicitly, and does not infer a denominator. Layer-by-layer verification is shown in the table below.

Factors determining dosage: the dosage section on the detail page notes 'fine-tune according to the specific processing technology and performance requirements (0–4‱ scale)'; the documentation does not provide directional clauses such as 'oil absorption value / mesh / thickness'—the basis for dosage adjustment for this grade is not recorded in the documentation. For actual addition amount, please request the technical documents supplied with the goods for the specific item number and conduct a small-scale trial; dosage values for other grades in the same series are not applicable to this grade.

To be verified: ① The dosage denominator basis (relative to resin / final article / total formulation) is not stated in the documentation—it has been explicitly marked, and the documentation provider is advised to add a note; ② This grade has no thickness-dosage directional clause; this page does not write one and does not apply directional conclusions from other grades; ③ The above are values as recorded in the documentation; for actual production, please confirm by small-scale trial in combination with your own grade and molding process. (Data source: product handbook / official product data)

The target systems are PET/PETG resin, strapping, filament drawing, sheet, film fiber, and other application fields (the overview sentence uses 'dedicated to' to lock the scope to PET / PETG plastics). Items are as follows:

PET resin / PETG resin

The first two items of the official application list; overview sentence: 'Dedicated to toughening, cold resistance, and impact modification of PET/PETG plastics.'

PET strapping

Listed in the official application list; the pipe and sheet domain note names this grade (PET sheet / strapping direction).

PET filament drawing

Listed in the official application list; the application domain registration includes the fiber and textile domain.

PET sheet

Listed in the official application list; the use checkboxes in the form on the detail page include 'sheet / film'.

PET film fiber

Listed in the official application list; this is a normalized way of splitting the handbook sentence 'PET/PETG…', and each item can be traced back to the original sentence for this grade.

Molded article direction

The application layer on the detail page lists 'related molded articles' (an open-ended statement at the page level)—the documentation does not provide a specific article list, and none is inferred.

Masterbatch-side relationship

No corresponding entry for this grade is found in masterbatch-type documentation or the official data layer, and no 'internal use' style mapping is found—it is written as 'no correspondence,' and no inference is made.

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

Most easily associated by model number are R1800-S / R1800-SK / R1800-SH (similar prefixes) and R188 / R1880 / R1848 (similar in form); also in the list are R410 (immediate row above) and CP-110 (two rows above) from the same series catalog. At the documentation level, each grade is independent; they are not written as parent/child codes or substitution relationships—values are not copied between them. The comparison is as follows:

Reading notes: ① The comparison only explains each grade's documentation positioning and applicable targets; dosage denominators differ by grade and values cannot be applied interchangeably; ② Judgment should be based only on the official full name and category field—only those whose category is 'toughening low-temperature agent' are in this grade's direction; do not infer from model numbers or list adjacency; ③ This grade is not on the list of nine true halogen-free grades; halogen-related labeling is treated as 'not applicable'. (Data source: product handbook / official product data)

The following points are item by item from the documented materials; items not listed in the materials are not drafted on this page.

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

• Product handbook: the entire section of this grade's technical data page (overview / main ingredients / four physicochemical properties / four main functions / addition content / packaging / storage conditions); contents row and the adjacent rows above and below in the same series.
• Official product data: all fields for this grade (name, category, tagline, description, mechanism, application, parameters, main ingredients, addition content, packaging); detail page layer copy (crystallization-retardation schematic curve, low-temperature impact comparison demonstration bench, quick-view bar, form example sentence).

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

• The dosage denominator basis is not stated in the materials (the same value at three layers is 2-4 parts per ten thousand; denominator not noted)—it is recommended that the document side add a note.
• Missing quantification and testing items: no notched impact strength improvement magnitude, no low-temperature brittleness temperature lower limit, no quantified values for demolding force and crystallization rate, no processing window width value; the melting point / density measurement methods are not noted.
• The detail page's effect curve is self-labeled 'schematic'; the impact bench does not give impact energy / specimen specifications / test standard / measured values—this page does not make quantitative statements.
• Solubility is typeset as 'slightly soluble in water, ethanol, benzene, and gasoline' (the combined-use form of the enumeration comma and 'and')—recorded as-is, not corrected.
• Shelf life, transport, method of use, processing temperature window, safety notes, disclaimer—none are given on this grade's page, and none are drafted.
• No corresponding entry on the masterbatch side has been seen in the materials; the specific product list for molded article direction is not given in the materials—state 'no correspondence / not stated in the materials', and do not infer.