HIPS Plastic Sheets: Property Data, Grades, Applications and Buying Checklist

A 2 mm HIPS sheet costs less than the same gauge in ABS, thermoforms around 130 to 150 degrees Celsius with very little residual stress, and holds a high-gloss surface that takes print, lamination and hot stamping cleanly. That combination is why refrigerator liners, deli trays and point-of-sale displays are built on it. The catch is that HIPS is not a drop-in substitute for ABS in every position: it softens earlier, it crazes on contact with hydrocarbon solvents, and it yellows outdoors unless a protective cap layer is co-extruded over the surface. This guide lays out the property window, the failure modes and the purchase-order details that decide whether a HIPS order runs cleanly or ends with a pallet of cracked trays.

What HIPS Plastic Sheet Actually Is

HIPS is a two-phase material: a polystyrene matrix with rubber grafted into it and dispersed as particles a few micrometres across. The rubber phase absorbs impact energy, which turns a glassy, brittle polymer into sheet that can be sawed, routed, drilled and deep drawn without shattering.

Crystal polystyrene is cheap and dimensionally steady, but a dropped tool will crack it. Adding the rubber phase multiplies notched impact strength several times over and slightly reduces stiffness. Because HIPS is naturally opaque, colouring is straightforward: white, black and matched shades are routine rather than special-order work.

• General purpose and high gloss sheet for displays, signage and light boxes
• Matte or low-gloss sheet that hides scuffs on appliance and automotive interior parts
• Antistatic and ESD grades in the 10^6 to 10^9 ohm per square range for tray and electronics packaging
• Flame retardant compounds reaching UL94 V-0, with halogen-free options worth confirming in writing
• Food contact grades meeting FDA 21 CFR 177.1640 and EU Regulation 10/2011, supplied with migration documentation

The processing window is wide, which is why converters keep specifying it. Our notes on how HIPS behaves during thermoforming cover draw ratios, oven zones and cooling in more detail.

HIPS Sheet Property Data at a Glance

Expect the following ranges from a controlled extrusion line. Ask for the mill certificate with every lot, because impact strength moves with rubber content and regrind ratio more than any other property.

HIPS vs ABS vs PP: What the Specification Should Weigh

HIPS is the cheapest of the three per kilogram and the most forgiving to form, ABS is the tougher and hotter-running option, and polypropylene wins on chemical resistance and flex fatigue.

Polypropylene becomes the better answer when a part meets hydraulic oil, aggressive cleaners or repeated flexing, as in a living hinge. It is softer, harder to bond, and takes printing poorly without surface treatment, so the switch is rarely free.

Where HIPS Sheets Earn Their Place

Five applications account for most HIPS sheet volume: refrigerator liners and casings, thermoformed food packaging, display and signage work, rigid consumer goods, and antistatic trays for electronics.

• Refrigerator liners, door panels and crisper casings in 1.5 to 4.0 mm high-gloss food contact sheet, deep drawn at ratios up to 2:1
• Food containers, cups and deli trays in 0.5 to 1.5 mm sheet, vacuum formed or pressure formed
• Point-of-sale displays, signage and light boxes in 1 to 3 mm sheet with a gloss or matte cap
• Toys, building blocks and household items in 1.5 to 3 mm sheet, painted or printed after forming
• Antistatic trays and electronic packaging in 0.8 to 2 mm sheet within the 10^6 to 10^9 ohm per square range

HIPS Casing Sheet for Refrigerator and Appliance HousingsDeveloped for refrigerator casings and similar appliances, this HIPS sheet offers rigidity, impact resistance and thermoforming suitability for durable housings.View Product →

HIPS Food Containers for Egg and Fruit TraysDesigned for food packaging such as egg and fruit trays, these HIPS containers combine rigidity, impact resistance and thermoforming compatibility for protective display.View Product →

The full HIPS sheet range covers gloss, matte, antistatic and flame retardant options, with colour, thickness, pattern and sheet size made to order rather than picked from a fixed stock list.

Limits You Should Design Around

HIPS fails in three predictable ways: sustained load above about 70 degrees Celsius, contact with hydrocarbon solvents and adhesives, and outdoor exposure without a protective cap.

A Practical Buying Checklist

Five items on the purchase order decide whether the delivered sheet runs cleanly on your line or wastes a shift in setup.

1. Thickness and tolerance. State nominal plus a band: 1.5 mm plus or minus 0.08 mm, and 3 mm plus or minus 0.12 mm are common commercial figures. Tighter bands cost more, so match them to the forming draw, not to habit.
2. Regrind content. Ask for the percentage in writing. Above roughly 20 to 25 percent regrind, impact strength and colour consistency begin to drift between lots.
3. Cap layer and gloss. Confirm whether one side or both are capped, and define the target with a gloss unit reading at 60 degrees rather than a verbal description of shiny or matt.
4. Flatness and camber. Specify a maximum deviation in millimetres per metre and agree on storage on edge, because a bowed sheet will misregister in the trim fixture.
5. Masking film and packing. Protective film must peel without leaving residue after weeks in a warm warehouse, and export pallets need edge protection to avoid transit scuffing.

Sourcing HIPS Sheet With the Right Support

Buy from a supplier that extrudes the sheet rather than one that only cuts it, because thickness, colour and cap layer have to be held on the line for the whole run.

Jiangsu MCH Technology Co., Ltd. supplies HIPS sheet alongside ABS, HDPE, PC/ABS, ASA/ABS, TPU/ABS and PMMA, with technical and sales teams handling specification questions from the first sample through to repeat orders.

HIPS Semi-Finished Sheets in Standard DimensionsSemi-finished HIPS sheet stock in 2440 mm by 1220 mm sheets and 0.5–10 mm thickness, with custom color and processability for cutting, punching and thermoforming.View Product →

Frequently Asked Questions

Is HIPS sheet food safe?

Food contact grades meet FDA 21 CFR 177.1640 and EU Regulation 10/2011, and are supplied with migration documentation. Confirm the grade for fatty or acidic foods specifically, since those conditions are tested separately.

Can HIPS sheet be thermoformed and machined?

Yes. The sheet forms between roughly 130 and 150 degrees Celsius and handles draw ratios near 2:1. It saws, routes and drills with sharp tooling; keep the feed rate high and clear chips so friction does not melt the cut edge.

How thick can HIPS sheet be supplied?

Standard production runs from 0.5 mm to 8 mm. Availability narrows above 6 mm because cooling time and stress control become critical, so thicker gauges are usually quoted as a custom run.

Does HIPS sheet yellow outdoors?

Unstabilised sheet does, typically within one outdoor season. A co-extruded acrylic or ASA cap slows the change and protects the gloss, but ABS or ASA sheet remains the better choice for parts that live outside permanently.