Nut Butter Cup Packaging: Viscosity, Oil Separation & Clean Seals
Fill the thickest, most viscous nut butters cleanly and accurately. The SDH-R's servo piston handles everything from smooth peanut butter to crunchy almond butter.
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This page explains how the SDH-R handles the product on the line. For configurations, pricing and a quote, see our peanut butter filling machine page.
Nut butters are among the thickest, most viscous products the SDH-R packages. Almond butter, peanut butter, cashew butter, and emerging alternatives like sunflower seed butter and tahini all require significant filling force, anti-stringing nozzle design, and oil separation management. The SDH-R's servo-driven piston delivers the force needed for cold nut butters while the agitated hopper prevents oil from pooling during long production runs.
Engineered for High-Viscosity Fills
High-Force Servo Piston
The servo motor delivers consistent force for ultra-thick nut butters that would stall pneumatic fillers. No air pressure fluctuations — every cup gets the same fill weight.
Anti-Separation Hopper
Continuous paddle agitation prevents natural peanut and almond butters from separating into oil and paste during filling runs.
Clean Cut-Off Technology
Nozzle and piston retraction sequence engineered for clean product cut-off, preventing stringing between cups — a common nut butter filling challenge.
Allergen-Safe Changeover
Full CIP wash and tool-free disassembly for validated allergen changeover between tree nuts, peanuts, and seed-based products.
SDH-R Configuration for Nut Butters
Products We Fill
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How the SDH-R Fills Nut Butters
Fully automatic process from empty cup to sealed product — no manual labour required
Cup Denesting
Empty cups are automatically separated from a nested stack and placed into the rotary table carriers. The pneumatic denester handles round, square, and rectangular cups from 2oz to 32oz — ideal for the standard nut butters cup formats your customers expect.
Servo-Driven Filling
The volumetric piston filler draws a precise dose of nut butters and dispenses it into the cup. Servo control adjusts stroke length and speed per recipe, maintaining ±0.5% fill-weight accuracy across production runs. The PLC stores recipes for quick changeovers between product variants.
Membrane Heat Sealing
Roll-stock film is drawn across the filled cup and heat-sealed to create a tamper-evident, airtight membrane. Sealing temperature, pressure, and dwell time are individually controlled to match your specific film and cup material combination.
Snap-On Lid (Optional)
A pick-and-place mechanism applies a consumer-friendly snap-on plastic lid over the membrane seal. This two-barrier system provides both tamper evidence and reclosability — the standard expected by grocery retailers and foodservice distributors.
MAP Nitrogen Flush (Optional)
Modified Atmosphere Packaging replaces oxygen in the headspace with food-grade nitrogen immediately before sealing. For nut butters, this typically extends refrigerated shelf life from 7–10 days to 30–45+ days — a requirement for most retail distribution channels.
Inside a Nut Butter Cup Filling Machine: Viscosity, Oil and Allergen Control
Nut butters behave differently from almost every other product we fill on the SDH-R. They are oil-continuous pastes with very low water activity, their viscosity swings sharply with temperature, and natural, unstabilized recipes start separating the moment they stop moving. A nut butter cup filling machine has to deliver a consistent dose through all of that, then leave the cup flange clean enough for a reliable heat seal.
Temperature is your viscosity control
Many producers fill nut butter warm, close to mill discharge, where it flows readily, and let it set in the cup; others fill at room temperature after stabilization. Both approaches work, but the fill temperature must be fixed and held, because the servo-driven piston filler doses by volume and a paste that thickens as it cools changes how cleanly it cuts off. Warm-fill limits are application-specific, so we confirm your fill temperature with our engineering team before quoting. Crunchy styles add a second variable: nut pieces need large-bore valving so they pass without bridging the valve or being crushed into the paste.
Common line problems and the configuration fix
Nut butter filling problems and SDH-R configuration responses
| Problem on the line | Usual cause | Configuration response |
|---|---|---|
| Stringing between cups | Elastic tail as the nozzle clears the cup | Suck-back or cut-off nozzle with a tuned retract profile |
| Oil on the cup flange | Drips and tails landing outside the cup | Drip-free nozzle and correct nozzle setting per cup |
| Weight drift during a shift | Oil separating from solids in the hopper | Small, frequent hopper top-ups and a weight checker with feedback loop |
| Blocked valve on crunchy SKUs | Nut pieces larger than the valve passage | Large-bore valving sized to your piece size |
Oil is the enemy of a membrane seal. Even a thin film on the flange can stop the heat seal from fusing, so seal temperature, pressure and dwell are stored per recipe, and we recommend confirming them with seal-strength checks on your actual cup and film combination.
Peanut butter portion cups and retail tubs
Peanut butter portion cups for snacking and foodservice are often 1 oz or smaller, which is below the SDH-R's standard 50 g minimum fill. A 2 oz cup sits at the low end of the range and is a practical single-serve format, while true 1 oz dipping cups call for a dedicated portion filler; our portion cup filling machine page explains where the SDH-R fits. For 8 oz and 16 oz retail tubs the machine is in its comfortable range. If your format is a glass or PET jar with a screw cap, you need a jar filling and capping line rather than the SDH-R.
Allergens and low-moisture hygiene
Peanuts and tree nuts are separate major allergens under FALCPA, and sesame, common in plants that also run a tahini filling machine, became the ninth major US allergen on January 1, 2023. Plan runs from the least to the most allergenic product and validate the clean between them. In low-moisture nut products Salmonella is the recognized hazard and roasting is typically the kill step, so post-roast hygiene is about keeping water out: after a CIP wash or tool-free strip-down, dry the product path fully before restarting. The same disciplines apply to seed butters and softer products covered on our spread filling machine page.
Nut Butter Cup Filling Machine — Frequently Asked Questions
The SDH-R nut butter cup filling machine starts from $45,000 USD with a single servo-driven piston filler, which handles smooth peanut, almond and cashew butter in cups and tubs. Crunchy styles may need large-bore valving, and options such as a weight checker with feedback loop, nitrogen flushing, plastic lid placement, coding and labeling add to the price. Send product details for a configured nut butter quote.
The SDH-R reaches up to 30 cups per minute on a dry cycle and typically runs 18–25 cups per minute in production. Peanut butter and other thick nut butters often run nearer the lower end of that range, because the piston needs time to draw and discharge a stiff paste cleanly. Fill temperature, cup size and fill weight all affect the final rate, which we estimate before quoting.
Not in its standard configuration. The SDH-R's standard fill range is 50–500 g, so 1 oz (about 28 g) peanut butter portion cups fall below it. A 2 oz cup, at roughly 57 g, sits at the low end of the range and is a workable single-serve format. For true 1 oz dipping cups, ask our engineering team whether a dedicated portion filler is the better fit.
The SDH-R's servo-driven volumetric piston holds fill-weight accuracy of ±0.5%. With nut butters, the main threat to accuracy is the product rather than the piston: oil separation and temperature change alter density during a run. Holding a fixed fill temperature, topping up the hopper little and often, and adding the optional weight checker with feedback loop keep declared net weights consistent across a shift.
Yes, provided the allergen changeover is validated. Peanuts and tree nuts are separate major allergens in the US, Canada and the EU, so moving from peanut butter to almond or cashew butter on the SDH-R requires a full clean of the product path using the CIP system and tool-free strip-down, with verification documented under your HACCP or preventive controls plan. Many plants schedule peanut runs last in the day.
Yes. The SDH-R can carry up to three fillers in one pass, so a nut butter base can be followed by a peristaltic pump dosing a liquid such as honey, or by a garnish filler adding chopped nuts or seeds. Every added ingredient affects allergen labeling and changeover planning, and very thick or warm inclusions are confirmed with our engineering team before quoting.
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Get a personalized SDH-R configuration quote for your product and production volume.