PE halogen-free flame retardantDedicated to thin polyethylene articles · hindered amine core · RoHS / REACH
Its core ingredient is a hindered amine compound and it contains no halogen; melt-compounded into the PE matrix as an internal additive, it raises the flame retardancy and antioxidant performance of thin PE articles without noticeably affecting film transparency or softness.
- ⚠ Only thin articles up to 15 si (0.15 mm)
- 🌱 Halogen-free · no toxic gases when burning
- 🔥 UL94 V-2 / GB/T 2408 FV-2
- ✨ Low migration · heat sealing unaffected
- Flame-retardancy rating
- UL94 V-2 / FV-2
- Applicable thickness
- ≤ 15 si (0.15 mm)
- Recommended dosage
- 10 – 20 %
- Processing temperature
- 150 – 200 ℃
The thickness gate · 15 si is the only line
Drag the thickness slider: inside the gate (≤15si) it passes and gives a dosage guide; outside (>15si) the red gate closes.
Tetramethylpiperidine derivative · radical scavenging
A hindered amine compound based on tetramethylpiperidine derivatives interrupts combustion by scavenging the free radicals formed during burning and inhibiting the chain reaction; it also provides some antioxidant action, delaying ageing of the PE material.
Non-ionic surfactant · uniform dispersion
A small amount of non-ionic surfactant helps the hindered amine disperse evenly in the PE melt, preventing agglomeration and ensuring the flame-retardant effect is evenly distributed in thin articles, without affecting the processing flow of PE.
Why 15 si
The product has a clearly defined thickness range: it can only be used in thin articles up to 15 si (0.15 mm); articles thicker than 15 si cannot reach the best state of the flame-retardant synergy, so do not use it in over-spec thickness products.
Performance features
Four performance features plus one self-extinguishing proof ring.
Halogen-free and eco-friendly
Halogen-free; when burning it does not release toxic hydrogen halide gases, produces little smoke and meets environmental and safety requirements, making it suitable for sensitive contact uses such as food and electronic components.
Efficient flame retardancy
At a dosage of 10%–20% it brings thin PE articles to UL94 V-2 (film type) or GB/T 2408-2008 FV-2 (adjusted by thickness), effectively inhibiting flame spread and reducing the risk of ignition from dripping.
Excellent compatibility
Good compatibility with PE resins (LDPE, LLDPE and the like) and low migration during film processing, with no effect on transparency, softness or heat-sealing performance, keeping the original PE feel.
Processing durability
Its heat resistance matches PE processing temperatures (150–200℃); it does not readily decompose in extrusion, blown-film and similar processes and delivers stable flame retardancy.
V-2 self-extinguishing proof ring (looping demo)
After a film specimen is ignited the flame spread is suppressed and it self-extinguishes once the source is removed — effectively inhibiting flame spread and reducing the risk of ignition from dripping; corresponding ratings:
Applications and how to use
All are ≤15si thin-article scenarios; dosage and thickness guide each other in opposite directions.
How to add
Mix this flame retardant thoroughly with PE pellets, then feed it directly into a blown-film or extrusion machine and process it into film after melt compounding to ensure even dispersion.
Processing conditions
Keep the processing temperature at 150–200℃ (the same as conventional PE film processing) and avoid excessive temperatures that would decompose the flame retardant.
Storage notes · sample request
Submit the form on the right and a technical consultant will contact you within 24 hours to arrange a sample.
Packing and storage
- Store in a cool, dry and ventilated place, away from moisture and direct sunlight;
- When handling, wear a dust mask and gloves and avoid breathing in dust or contacting the skin;
- Reseal after opening to prevent moisture pick-up that would affect dispersion.
01Product positioning
R911 belongs to the halogen-free flame retardant category (official English category name Halogen-Free FR), Chinese name "PE Halogen-Free Flame Retardant R911", official catalog page model name "PE Hindered Amine Type Halogen-Free Flame Retardant". Product overview, verbatim: "This product is a halogen-free flame retardant developed specifically for polyethylene (PE) thin products (such as films, sheets, woven filaments, ultra-thin tubes, etc.), with hindered amine compounds as the core component, containing no halogen (chlorine, bromine, etc.), and compliant with environmental requirements and international regulations such as RoHS and REACH. Melt-incorporated into the PE matrix by internal addition, it can effectively improve the flame retardancy of PE thin products without significantly affecting film transparency or flexibility, and is suitable for scenarios requiring flame retardancy such as packaging films, agricultural films, tent films, and electronic insulating films." (Data source: product handbook / official product data)
Thickness threshold (the core usage boundary of this model): the page states explicitly, "This product has a clear applicable thickness range for products: it can only be used for thin products within 15 si (0.15 mm); for thick-walled products exceeding 15 si, the flame-retardant synergy mechanism cannot reach its optimal state, so do not apply it to products with out-of-spec thickness." This boundary comes from the official page wording; the same sentence is not found in the handbook body text and has been listed as pending verification. (Data source: official product data)
Mechanism (unified to a single version after correction according to the product specification on 2026-10-06): the handbook body text takes "hindered amine compounds — by capturing the free radicals generated during combustion, inhibiting the chain reaction, and interrupting the combustion process" as the main line of the mechanism, and records that they also possess a certain antioxidant property that delays the aging of PE materials; the official mechanism field has been corrected accordingly to "hindered amine free radical capture / chain reaction inhibition" (the original "phosphorus-nitrogen synergistic flame retardancy" was an unsourced value in the initial version and has been corrected). (Data source: product handbook / official product data)
Halogen-free statement (traced back verbatim to the source): the product name is "PE Halogen-Free Flame Retardant"; the overview records "contains no halogen (chlorine, bromine, etc.), compliant with environmental requirements and international regulations such as RoHS and REACH"; the performance features record "halogen-free and environmentally friendly: contains no halogen, does not release toxic hydrogen halide gas when burning, and has low smoke volume". This product is a halogen-free model, and the page's compliance wording is written in the halogen-free direction. (Data source: product handbook / official product data)
- Thin-product main line — developed specifically for PE thin products: films, sheets, woven filaments, ultra-thin tubes, etc.; applicable thickness ≤ 15 si (0.15 mm).
- Halogen-free and environmentally friendly — "contains no halogen, does not release toxic hydrogen halide gas when burning, and has low smoke volume", suitable for sensitive scenarios such as contact with food and electronic components; compliant with environmental requirements and international regulations such as RoHS and REACH (compliance statement; report numbers are not attached in the materials).
- Compatibility and form retention (qualitative) — good compatibility with PE resins (LDPE, LLDPE, etc.); not prone to exudation during film processing; does not affect the transparency, flexibility, or heat-sealing performance of the products; maintains the original feel of PE.
- Combined antioxidant property — the hindered amine system "also possesses a certain antioxidant property, delaying the aging of PE materials" (quantitative weathering data not provided in the materials).
- Two usage paths (company technical proposition) — buy the flame retardant and compound it yourself (the route for this model: mix with PE pellets and feed directly into a blown film machine / extruder), or buy the masterbatch and add it directly (corresponding to the masterbatched route), choosing according to production line conditions and formulation freedom.
- Recording note — the entry for this model is not accompanied by a complete table of physicochemical indicators (appearance, density, moisture, etc. are not listed); this page writes "not stated in the materials" as-is and does not invent values.
02Formulation system & mechanism of action
Two core components (handbook verbatim): hindered amine main body — "hindered amine compounds with tetramethylpiperidine derivatives as the core, which capture the free radicals generated during combustion, inhibit the chain reaction, interrupt the combustion process, and thereby achieve the flame-retardant effect, while also possessing a certain antioxidant property that delays the aging of PE materials"; synergistic dispersant — "a small amount of nonionic surfactant, which assists the hindered amine in dispersing uniformly in the PE melt, prevents agglomeration, ensures that the flame-retardant effect is uniformly distributed in thin products, and does not affect the processing fluidity of PE". (Data source: product handbook / official product data)
Mechanism field correction note (2026-10-06 per product specification): The official mechanism field originally recorded "phosphorus-nitrogen synergistic flame retardancy", while the words "phosphorus-nitrogen" are not recorded on this model's page in the handbook; according to the verbatim [Core Ingredients] in the product specification and the official detail page "CORE / hindered amine main body · captures free radicals", the field has been corrected to "hindered amine free radical capture / chain reaction inhibition", consistent with the handbook main line and no longer presented in parallel. (Data source: product handbook / official product data)
Mechanism boundary of the thickness threshold: for thick-walled products with a thickness exceeding 15 si (0.15 mm), "the flame-retardant synergy mechanism cannot reach its optimal state" — this is the direct reason this model limits its applicable range to thin products. Antioxidant property from the same source: the hindered amine structure provides antioxidant properties in addition to flame retardancy, delaying PE aging (qualitative statement). (Data source: product handbook / official product data)
- Internal addition — melt-incorporated into the PE matrix"After fully mixing this flame retardant with PE pellets, feed them directly into a blown film machine or extruder; after melt blending, process into film, ensuring uniform dispersion."
- Uniform dispersion — assisted by nonionic surfactantA small amount of nonionic surfactant assists the hindered amine in dispersing uniformly in the PE melt, prevents agglomeration, distributes the flame-retardant effect uniformly in thin products, and does not affect processing fluidity.
- Flame-retardant action — free radical capture / chain reaction inhibition (handbook main line)The hindered amine captures the free radicals generated during combustion, inhibits the chain reaction, and interrupts the combustion process (the mechanism field was corrected accordingly on 2026-10-06 according to the product specification, consistent with the handbook).
- Boundary — thin-product limitationApplicable thickness ≤ 15 si (0.15 mm); for products exceeding this thickness, the flame-retardant synergy mechanism cannot reach its optimal state.
03Key parameters
This grade's entry does not include a complete physical and chemical specification table (appearance, density, moisture, melting point, thermal decomposition temperature, particle size, active content, etc. are not listed)—this page does not draft values on its behalf. The table below lists the verifiable items actually recorded in the source material.
| Item | Value / description |
|---|---|
| Main component | Hindered amine compounds with tetramethylpiperidine derivatives as the core |
| Flame retardant rating | UL94 V-2 (film type) or FV-2 flame retardant standard in GB/T 2408-2008 (adjusted according to thickness) |
| Processing temperature | 150-200℃ (consistent with conventional PE film processing); avoid excessively high temperatures that cause the flame retardant to decompose |
| Shelf life | 12 months (the starting point for counting and the validity period after opening are not given in the source material) |
| Packaging | 25 kg bag packaging, PE double-layer bag |
| Applicable product thickness | ≤ 15 si (0.15 mm)—page wording; the same sentence is not found in the handbook text, listed as pending verification |
| Recommended dosage | 10%-20% (the thinner the thickness, the more the dosage should be appropriately increased; the optimal ratio can be determined through small-sample testing) |
| Compatibility (qualitative) | Good compatibility with PE resins (LDPE, LLDPE, etc.); not prone to migration during film processing; does not affect transparency, flexibility, or heat-sealing performance |
| Physical and chemical specification table | Not recorded in the source material (no specification table attached to this grade) |
Reading notes: (1) The halogen content threshold and test report (ppm-level values), UL94 / GB/T test specimens and thickness, and RoHS / REACH compliance declarations and report numbers are all not given in the source material (the compliance wording is in the main text; the documents are not attached in the source material); (2) the test method and criteria for "not prone to migration" are not given in the source material; (3) quantitative retention rates for transparency, heat-sealing strength, and mechanical properties after addition are not given in the source material (only qualitative "no effect / no significant effect"). (Data source: product handbook / official product data)
04Recommended dosage window
The dosage rests on a single statement: recommended dosage 10%-20%, adjusted according to the thickness of PE thin products and flame retardant requirements (the thinner the thickness, the more the dosage should be appropriately increased); the source material does not specify the denominator basis (relative to PE resin mass / total system mass).
| Scenario | Dosage | Conditions & notes |
|---|---|---|
| PE thin products (adjusted according to thickness and flame retardant requirements) | 10%-20% | The handbook and official product data use the same wording; the thinner the thickness, the more the dosage should be appropriately increased (toward the upper end of the range); the optimal ratio can be determined through small-sample testing |
| Denominator basis | Not specified in the source material | Not stated as relative to PE resin mass / total system mass; this page records it faithfully and does not draft it on its behalf (the "internal addition ratio" on the masterbatch side is defined for a different system and is not applied here) |
| Application measured data points (thickness × dosage → rating) | Not recorded in the source material | No measured records are given for this grade; this page does not draft them on its behalf |
Addition method: "After fully mixing this flame retardant with PE pellets, feed directly into a blown film machine or extruder, and process into film after melt blending, ensuring uniform dispersion." Processing conditions: 150-200℃ (consistent with conventional PE film processing); avoid excessively high temperatures that cause the flame retardant to decompose. Thickness-direction clause: this grade has directional guidance—"the thinner the thickness, the more the dosage should be appropriately increased" (the thinner, the more added).
Pending verification: (1) the denominator basis for 10%-20% (relative to PE resin / total system mass) is not stated in the source material; (2) the test specimens, thickness, testing institution, and report numbers for UL94 V-2 / GB/T 2408-2008 FV-2 are not recorded in the source material; (3) the above are all values recorded in the source material; for actual formulations, please determine them through small-sample testing.
05Applications
The source material's [Scope of application] and the overview scenarios are itemized as follows; the processes are extrusion and blown film (the page records "blown film machine or extruder").
- Various PE films
- Packaging film, shrink film, protective film, agricultural mulch film, etc. (item 1 of the source material's [Scope of application]); the overview scenarios separately list agricultural film, tent film, and electronic insulating film.
- PE sheets and ultra-thin products
- Electronic insulating sheets, lightweight packaging sheets, etc. (item 2 of the source material's [Scope of application]).
- Woven filaments / ultra-thin tubes
- The PE thin-product scope listed in the overview (woven filaments, ultra-thin tubes, etc.); the page's marquee separately lists woven filaments.
- Compliance applicable scenarios
- "contains no halogen, releases no toxic hydrogen halide gas during combustion, low smoke, meets environmental safety requirements, suitable for sensitive scenarios such as food contact and electronic components".
- Antioxidant-related scenarios
- Also provides antioxidant properties and delays PE aging—meaningful for long-term outdoor scenarios such as agricultural film (qualitative statement; no quantitative weathering data).
- Two usage paths (company technical proposition)
- Path 1: purchase this flame retardant and compound it yourself (mix with PE pellets, then feed directly into a blown film machine / extruder); Path 2: purchase the corresponding masterbatch and add it directly (integrated molding, saving the compounding step). The two paths are chosen according to production line conditions and formulation freedom.
Field issues & application examples (as recorded in the source material)
| Field issue | What the source material states |
|---|---|
| Can it be used for thick-walled products? | It cannot be used in its optimal state. Page wording: "It can only be used for thin products up to 15 si (0.15 mm); for thick-walled products exceeding 15 si, the flame retardant synergy mechanism cannot reach its optimal state, so do not apply it to products whose thickness exceeds the specification." |
| Does the film remain transparent after use? | The source material gives a qualitative statement: "improves flame retardant performance without significantly affecting the film's transparency or flexibility"; the compatibility entry records "does not affect the product's transparency, flexibility, or heat-sealing performance." Quantitative retention rates are not given in the source material. |
| How is it added, and how is the temperature controlled? | Mix thoroughly with PE pellets, then feed directly into a blown film machine or extruder and process into film by melt blending; keep the processing temperature at 150-200℃ (consistent with conventional PE film processing) to avoid excessively high temperatures that cause the flame retardant to decompose. |
| What is the flame retardancy mechanism of R911? | Hindered amine free radical capture / chain reaction inhibition: the handbook text records hindered amine compounds—capturing free radicals generated during combustion, inhibiting chain reactions, and interrupting the combustion process. The original "phosphorus-nitrogen synergistic flame retardancy" in the official mechanism field was an unsourced value in the initial version and was corrected accordingly on 2026-10-06 per the product specification. (Data basis: product handbook / official product data) |
06How it differs from related grades
On the flame retardant side, several branches are divided by substrate and functional direction (all in the same non-halogen direction); this table gives the coordinates of this grade, and the comparison columns are the original text of their respective source materials, with values not interchanged between them.
| Dimension | R911 (this grade) | R912 (comparison) | R915 (comparison) | R940 (comparison) |
|---|---|---|---|---|
| Substrate / form | PE thin products / solid flame retardant | PET, PETG, TPU / transparent direction | PET, PETG / transparent high-transparency direction | UV and PU systems / reactive liquid |
| System | Hindered amine class (main line of the handbook) | Organophosphorus lithium salt system | Polyol phosphate ester (additive type) | DOPO + phosphazene + HEMA (reactive type) |
| Dosage | 10%-20% (the thinner the thickness, the closer to the upper limit) | PETG / PET each 1.5%–3%; TPU 2%–7% | V-2 (1.5 mm) 1%–2%; V-0 (1.0–1.5 mm) 2%–4% | UV system 15-30%; PU system 12-25% |
| Processing temperature | 150-200℃ | PET 230–280℃ / PETG 190–250℃ / TPU 160–225℃ | Barrel 240–275℃ (page safety range 240-280℃) | By polymerization system, not a hot-melt processing route |
Reading notes: (1) The dosage, temperature, and system of the four grades are all different — values are not inter-applied or converted between them; (2) The thickness direction of this grade is "the thinner, the more added"; the direction clauses of other grades in the same batch are independent of one another (some are "the thinner, the less added", some give no direction), and must not be applied to one another; (3) The comparison columns are the original text of their respective source materials. (Data source: product handbook / official product data)
07Usage & storage
The following points come item by item from the source records.
Method of use (verbatim from the handbook)
- Addition method: after fully mixing this flame retardant with PE pellets, feed directly into a blown film machine or extruder; after melt blending, process into film, ensuring uniform dispersion.
- Processing conditions: processing temperature is controlled at 150-200℃ (consistent with conventional PE film processing), avoiding excessively high temperatures that cause the flame retardant to decompose.
- Addition amount: according to the thickness of PE thin products and flame retardant requirements, the recommended addition amount is 10%-20% (the thinner the thickness, the more appropriately the addition amount should be increased); the optimal ratio can be determined specifically through small-sample testing.
Scope of application and boundaries
- Various PE films: packaging film, shrink film, protective film, agricultural covering film, etc.
- PE thin sheets and ultra-thin products: electronic insulating sheets, light-duty packaging sheets, etc.
- Thickness boundary: ≤ 15 si (0.15 mm); beyond this, the flame retardant enhancement mechanism cannot reach its optimal state.
Packaging and storage
- Packaging: 25 kg bag packaging, PE double-layer bag.
- Shelf life: 12 months (the starting point of calculation and the validity period after opening are not given in the source).
Not recorded in the source (not compiled on this page)
- Physicochemical specification table (appearance, density, moisture, melting point, thermal decomposition temperature, particle size / fineness, effective content, flash point, etc.) — this grade is not accompanied by a specification table.
- Oxygen index (LOI) data, application measured points (thickness × addition amount → rating) — not given in the source.
- RoHS / REACH compliance declarations and report numbers, halogen content thresholds and test reports — not attached in the source.
08FAQ
What is the relationship between R911 and the masterbatch?
Two paths: R911 is a flame retardant (raw material) — after purchase, it is mixed with PE pellets and processed on your own; the masterbatch path is a semi-finished product with the flame retardant compounded with a carrier, etc., which can be added directly and formed in an integrated process. The official data separately records the correspondence of masterbatch grades using this grade, but the masterbatch formulation and process data are not disclosed, and are not expanded on this page.
Why is it limited to within 15 si?
Page wording: "For thick-walled products exceeding 15 si, the flame retardant enhancement mechanism cannot reach its optimal state." This boundary comes from the official page wording; the handbook body does not contain the same sentence, and this page marks it faithfully and lists it as pending verification.
What is the recommended addition amount? What is the denominator?
The recommended addition amount is 10%-20%, and the thinner the thickness, the more it is recommended to increase appropriately; the denominator wording is not specified in the source (whether relative to PE resin mass / total system mass is not indicated). The optimal ratio is determined specifically through small-sample testing.
What level of flame retardant rating can be achieved?
The source records "UL94 V-2 rating (film type) or the FV-2 flame retardant standard in GB/T 2408-2008 (adjusted according to thickness)". Test specimens, thickness, and report numbers are not recorded in the source.
Does it contain halogen? Does it have environmental certification?
This product does not contain halogens (chlorine, bromine, etc.), and does not release toxic hydrogen halide gas when burned, with low smoke; the source records that it complies with environmental requirements and international regulations such as RoHS and REACH. The compliance declarations and report numbers are not attached in the source, and this page does not draft them on its behalf.
Packaging and shelf life?
Packaging is 25 kg bags, PE double-layer bag; shelf life is 12 months (the starting point of calculation and the validity period after opening are not given in the source).
AppendixData sources
The data on this page comes from two types of source material, traceable item by item:
- Product handbook: the entry for this grade (product overview / two core components / performance characteristics / scope of application / method of use / storage and precautions / packaging); the handbook's table of contents line; the same-text page in the flame retardant series booklet.
- Official product data: all fields for this grade (name, category, positioning, description, mechanism, application, specifications, main components, recommended dosage); page-level copy (thickness threshold, four performance items, scenario cloud, addition method and reverse guidance, packaging and storage section); flame retardant series entries (tagline, description, signature grades).
Not covered by the source material (not written on this page — to be added later)
- Mechanism field: corrected on 2026-10-06 according to the product specification (original "phosphorus-nitrogen synergistic flame retardancy" → "hindered amine free radical capture / chain reaction inhibition") — this item is closed (decided, effective from 2026-10-06).
- The source provenance of the applicable thickness "≤15 si (0.15 mm)" — present on the official page, absent from the handbook body.
- The denominator basis of the recommended addition amount, UL94 / GB/T test details, halogen thresholds and test reports, RoHS / REACH declaration numbers — not recorded in the source.
- Missing items in the physicochemical specification table, oxygen index (LOI) data, application measured points, oxidation resistance and quantified mechanical retention rate — not given in the source.