Jiangsu Xinfuda supplies ABS H1100 UV as an injection-moulding-grade acrylonitrile-butadiene-styrene copolymer modified with a UV-stabiliser package. The grade code separates the material from stabiliser-free H1100 resin, high-flow ABS series products, and glass-reinforced grades. The UV suffix is relevant where indoor solar transmission through glazing or brief exterior exposure can discolour or embrittle standard ABS. The material is not positioned as an equivalent to ASA or AES in continuous outdoor structural service; its intended operational envelope is limited to components with an opaque surface coating, metallisation, or restrained cumulative UV dose. Processing is performed on conventional reciprocating-screw injection moulding machines with general-purpose ABS screw geometry. Published grade-specific datasheet values for this product are limited; processors should secure the supplier’s certificate of analysis before tooling release.

Which Drying and Melt-Preparation Boundaries Govern the H1100 UV Grade?

ABS is hygroscopic. Residual moisture content above 0.1 % by mass at the feed throat generates splay, blistering, surface silver streaks, and a measurable reduction in notched impact strength due to hydrolysis during plastication. A desiccant dryer with dew point no higher than -40 °C and drying temperature of 80 °C for 2 h to 4 h is recommended for this material family; the required residence time is extended when regrind content exceeds 20 % or when warehouse relative humidity is above 60 %. Moisture content before moulding should be confirmed by Karl Fischer titration or gravimetric moisture analysis according to ISO 15512:2019 for lot approval. Dryer hopper capacity and residence time must be matched to shot weight and cycle time so that dried material is not held at temperature beyond 4 h without inert-gas protection; otherwise, surface gloss may shift due to oxidative pre-ageing.

Melt preparation on a single-stage screw with an L/D ratio of 20:1 to 25:1 and a compression ratio of 2.0:1 to 2.5:1 is adequate. Nozzle melt temperature is maintained between 210 °C and 240 °C; mould surface temperature is held between 40 °C and 70 °C. Back pressure between 0.5 MPa and 1.5 MPa helps stabilise melt density. Injection speed is set to provide a flow-front velocity of 100 mm/s to 300 mm/s depending on flow-length-to-thickness ratio. Holding pressure is usually 60 % to 80 % of peak injection hydraulic pressure, with gate freeze confirmed by cavity pressure monitoring. Screw rotation speed should be set so that recovery time does not exceed 80 % of cooling time; excessive screw speed above 150 min⁻¹ can create frictional heating and local melt temperature above the set barrel temperature. Melt cushion should be maintained between 2 mm and 5 mm to avoid pressure loss at the end of screw stroke.

Above 250 °C melt temperature, oxidative degradation of the polybutadiene phase accelerates, producing brown discolouration, loss of notched Izod impact, and carbonised specks. Residence time should be kept below 6 min to 8 min; start-ups after interruption require purging with a commercial acrylic purging compound to remove thermally degraded holdup in dead zones. Melt-pressure variation at the nozzle should be kept within ±0.5 MPa for consistent shot weight, because poor melt-density stability alters packing and often produces dimensional warpage near gate regions. The melt-quality issue is particularly important for multi-cavity tools with unbalanced runner systems, where cavity-to-cavity pressure differences above 5 % can generate visible gloss variations on textured surfaces.

Accelerated Weathering and Stabiliser Partitioning in the Polybutadiene Phase

The UV suffix in ABS H1100 UV is associated with a compounded light-stabiliser package, typically comprising a UV absorber and a hindered amine light stabiliser or functionally equivalent radical scavenger. Photo-oxidation of ABS begins in the unsaturated polybutadiene-rich rubber domains because allylic hydrogen sites are readily abstracted under ultraviolet irradiation. Oxidation forms conjugated carbonyl and hydroxyl species that cause yellowing, surface microcracking, and gloss loss. The stabiliser package operates through competitive UV absorption and radical scavenging; its protective window is finite because additive migration, water extraction, and stabiliser consumption occur during repeated exposure. The butadiene phase remains the weathering weak point even after stabilisation, which is why UV-stabilised ABS cannot be considered a weatherable polymer.

Accelerated weathering is assessed according to ISO 4892-2:2013 method A cycle 1 or ASTM G155-13 cycle 1. Evaluation commonly includes colour change per ISO 7724-2, gloss retention at 60° per ISO 2813, and notched impact retention per ISO 180/A. UV-stabilised ABS of this class may show visible yellowing after 300 h to 500 h of continuous xenon-arc exposure at 0.51 W/m² at 340 nm, while unstabilised ABS can reach the same visual threshold in 100 h to 200 h. Published data for the exact H1100 UV formulation is limited; production-textured plaques should therefore be exposed before colour-harmony release. The correlation between accelerated weathering and outdoor service must not be assumed linear because moisture, thermal cycling, and atmospheric contaminants shift degradation kinetics.

Compared with ASA or AES polymers, which contain saturated acrylic or olefinic rubber backbones, UV-stabilised ABS retains a lower weathering ceiling because the unsaturated butadiene segments remain inherently vulnerable to photo-oxidative chain scission. For this reason, H1100 UV is usually constrained to indoor UV exposure, short-duration exterior service, or applications where an opaque coating, metallisation, or in-mould film lamination blocks UV transmission. The grade should not be used for uncoated exterior body panels, load-bearing outdoor structural parts, or components requiring long-term gloss retention in direct sunlight. For compound qualification, gloss retention above 70 % after a defined xenon-arc interval is commonly used as a pass/fail criterion for interior UV applications, but the threshold depends on the original equipment manufacturer specification.

Routine incoming-resin and moulded-part verification for UV-stabilised ABS requires a test matrix aligned with the supplier’s certificate of analysis. The standards listed below are the minimum characterisation set used for this material family; lot-specific acceptance limits must be read from the certificate.

Melt-volume rate acceptance for high-impact ABS injection grades in this viscosity class is often controlled between 15 cm³/10 min and 25 cm³/10 min at 220 °C/10 kg, but the H1100 UV batch value can vary and must be verified from the lot certificate. Shrinkage and mechanical property comparisons between UV-stabilised and unstabilised versions should be made on specimens moulded from pre-dried resin with matched thermal history; otherwise, the influence of moisture and degradation overwhelms the small rheological difference contributed by the stabiliser additive package. Batch-to-batch variance is typically expressed as colour-coordinate drift and small notched-impact changes; incoming lot release should therefore include colour measurement against a reference plaque.

Mechanical performance of H1100 UV is governed by the base resin’s rubber content, rubber particle size distribution, graft ratio, and molecular weight distribution. The stabiliser package preserves properties after ageing rather than increasing as-moulded strength. As-moulded notched Izod impact for high-impact ABS in this class is generally above 15 kJ/m² at 23 °C per ISO 180/A, while general-purpose ABS may fall below 10 kJ/m². These ranges are class-typical and not lot-release values for this specific grade. Tensile modulus for high-impact ABS is typically lower than unfilled general-purpose ABS, with class values between 1,800 MPa and 2,400 MPa per ISO 527-2, whereas glass-reinforced grades exceed 5,000 MPa. The ductile-to-brittle transition temperature depends on rubber morphology and strain rate; sub-zero impact tests at -30 °C per ISO 180/A should be examined for vehicle interior parts.

When H1100 UV Replaces Unstabilised ABS in an Existing Mould

The replacement of a non-UV ABS grade with H1100 UV is not an unconditional drop-in substitution. Mould shrinkage and flow length are expected to remain close to those of the equivalent high-impact base resin, but the UV stabiliser package can affect plate-out, surface slip, paint adhesion, and laser weldability. A process revalidation trial should begin with the existing barrel temperature profile and then lower the rear zone temperature by 5 °C to 10 °C if surface specks indicate additive decomposition. Mould temperature should be held at the upper end of the previous production window to preserve surface gloss. Shrinkage measurements should follow ISO 294-4:2018. Mould cavities originally cut for general-purpose ABS may require modification if the H1100 UV grade exhibits a mould shrinkage difference greater than 0.2 percentage points. Parts should be measured after 48 h post-mould conditioning at 23 °C and 50 % relative humidity per ISO 291:2008.

Differences from a high-flow ABS or standard general-purpose ABS are more significant. The H1100 designation is associated with an impact-modified formulation; therefore, filling pressure and packing time may be longer than a high-flow grade because the melt has greater flow resistance at the same barrel temperature. Processors comparing different suppliers’ ABS H1100-type products should not rely on the single melt-volume-rate value alone; capillary rheometry per ISO 11443:2021 at shear rates from 10 s⁻¹ to 10 000 s⁻¹ provides the viscosity data needed for mould-filling simulation. The cross-shear viscosity curve, not the single point at low shear, determines gate pressure and weld-line strength in thin-walled sections.

UV-stabilised ABS may have different laser-transmission behaviour than unmodified ABS at 940 nm or 1064 nm depending on package composition. Laser-welded joints should be validated by destructive pressure testing or tensile testing according to ISO 527-2, because the stabiliser additive can absorb or scatter the beam and lower weld strength. Paint adhesion and in-mould label bonding should also be requalified because low-molecular-weight stabiliser migration to the surface can alter surface energy. Compounding with additional amine-based additives or unverified pigment masterbatches should be avoided without ageing stability trials; interactions with the existing stabiliser package can produce yellowing, plate-out, or premature surface degradation. The material should also be evaluated for stabiliser exudation on polished mould surfaces after extended processing.

On production lines using reciprocating-screw machines of 800 kN to 2,000 kN clamp force, the most commonly observed process issue with UV-stabilised ABS is plate-out of stabiliser degradation by-products on cavity surfaces after 12 h to 24 h of continuous cycling. The effect is more severe when regrind content exceeds 20 % or when vent depth is below 0.02 mm. Mould maintenance should include periodic cleaning with an alkaline mould cleaner and inspection of polished surface roughness. Screw wear is comparable to unmodified ABS, but shut-off nozzle dead zones can degrade the stabiliser package and produce speck contamination after start-up.

Suitable application areas for Jiangsu Xinfuda ABS H1100 UV include indoor automotive trim, air-conditioning louvres, electrical enclosures positioned near fluorescent lamps, and small appliance housings exposed to window-filtered sunlight. The product is not recommended for hot-water service above 60 °C, continuous outdoor exposure without a UV-opaque coating, or load-bearing exterior structural components because oxidative ageing of the polybutadiene phase accelerates. When opaque painting, metallisation, or in-mould film lamination blocks UV transmission, the material can be considered for interior-exterior interface parts, provided the coating adhesion and film bonding are revalidated under production conditions. Regulatory documentation for this grade should be obtained from the supplier; ABS polymers of this class are commonly assessed against RoHS Directive 2011/65/EU Annex II and the REACH Candidate List. Product-specific declarations are required for each lot, especially when colour masterbatches or flame-retardant packages are introduced downstream.