# Heat Seal & Hot Tack Testers for Flexible Packaging - Link: https://flexitest.in/packaging-testing-equipments/heat-seal-hot-tack-tester-machines/ - Published: 2024-08-30T08:57:59+05:30 - Author: chetanvarne # Heat Seal & Hot Tack Testers for Flexible Packaging 1. [Home](https://flexitest.in) 2. [Packaging Testing Equipments](https://flexitest.in/packaging-testing-equipments/) 3. Heat Seal & Hot Tack Testers for Flexible Packaging ![C630H heat seal tester and C632M hot tack tester for flexible packaging](https:// flexitest.in/wp-content/uploads/2025/04/C630H-C632M-Packaging-Main-banner-new.webp" Heat Seal & Hot Tack Testers for Flexible Packaging 5") ![heat seal hot tack tester packaging m](https://flexitest.in/wp-content/uploads/ 2026/09/heat_seal_hot_tack_tester_packaging_m.webp "Heat Seal & Hot Tack Testers for Flexible Packaging 6") ## Heat Sealability vs Hot Tack: Choose the Right Test Choose between two Labthink testers supplied by Flexitest in India. Use the C630H to develop repeatable sealing conditions, or the C632M to measure hot-tack force before a seal cools. **Quick guide:** C630H helps you make controlled seal samples. C632M measures hot- tack force. If you need to study both seal formation and fresh-seal performance, use both test methods. On a phone, swipe across the table to compare both models. Which tester fits your application? | Compare by | [C630H Heat Seal Tester](https://flexitest.in/packaging-testing-equipments/heat-seal-hot-tack-tester-machines/#c630h-heat-seal-tester) | [C632M Hot Tack Tester](https://flexitest.in/packaging-testing-equipments/heat-seal-hot-tack-tester-machines/#c632m-hot-tack-tester) | | Choose it when | You need to find repeatable sealing conditions for a film or laminate. | You need to know whether a fresh seal will hold during filling and transfer. | | What it does | Creates controlled laboratory seals by setting temperature, pressure and dwell time. Use a separate tensile or seal-strength tester for cooled seal strength. | Creates the seal, waits for the programmed delay and measures hot-tack force with a 50 N load cell. | | Key settings | Room temperature–300°C; 0.1–0.7 MPa; 0.1–999.99 s dwell. | Room temperature–250°C; 0.05–0.7 MPa; 0.1–999.9 s dwell; 0.01–999.99 s delay. | | Test setup | Five independently temperature-controlled upper and lower jaw groups help you prepare and compare seals efficiently. | One double-heated jaw set with automatic sample feeding and pneumatic clamping. | | Typical use | Film development, supplier or batch qualification, sealing-window studies and sample preparation. | Film selection and troubleshooting when seals open during VFFS/HFFS filling, dropping or conveyor transfer. | | Materials | Plastic and composite films, coated paper, coextruded and aluminized films, foil composites, patterned films and flexible plastic tubes. | Plastic films, sheets and composites, including PE-, PP- and PET-based packaging films. | | Test standards | ASTM F2029, QB/T 2358 and YBB 00122003. | ASTM F1921 and GB/T 34445. | Start with your test goal, material and failure point. If you are unsure, share them with us and we’ll help you choose. ## C630H Heat Seal Tester for Flexible Packaging ![Labthink C630H heat seal tester for controlled flexible packaging seals](https:// flexitest.in/wp-content/uploads/2025/04/C630H-Packaging-Product-banner-new.webp " Heat Seal & Hot Tack Testers for Flexible Packaging 7") ![c630 heat seal tester packaging m](https://flexitest.in/wp-content/uploads/2026/ 09/c630_heat_seal_tester_packaging_m.webp "Heat Seal & Hot Tack Testers for Flexible Packaging 8") Develop reliable sealing conditions before a film or laminate reaches production. The Labthink C630H lets product-development and quality-control teams prepare up to five groups of laboratory seals with independently controlled jaw temperatures, making it easier to compare temperature, pressure and dwell-time settings. Use it for material development, supplier or batch qualification and sealing-window studies. When you need cooled seal-strength results, test the prepared specimens separately on a suitable tensile or seal-strength tester. Get Free Quote #### Submit Your Details to Download Brochure! Name Email Phone Number Company Name Company Location By clicking the button, I agree and consent to the company’s [Privacy Policy](https://flexitest.in/privacy-policy) ![C630H five-station laboratory heat seal tester](https://flexitest.in/wp-content/ uploads/2025/04/C630H-Packaging-inner-bg-e1725011616706-min-scaled-e1747224699416- 1024x645.webp "Heat Seal & Hot Tack Testers for Flexible Packaging 9") Safe-multi-function 5-Independent-Heat-Sealing-Jaws Software-1 Precise-Temp.-Control Testing-method-standard ## C630H Applications & Key Features * Prepare up to five groups of seals in one run, with independent temperature control for every upper and lower jaw pair. * Adjust sealing temperature, pressure and dwell time to find a repeatable sealing window. * Operating range: room temperature–300°C, 0.1–0.7 MPa and 0.1–999.99 s dwell time. * Suitable for plastic and composite films, coated paper, coextruded and aluminized films, foil composites, patterned films and flexible plastic tubes. * Supports ASTM F2029, QB/T 2358 and YBB 00122003 methods listed by Labthink. * Optional PC software supports remote operation, data saving, export and printing. Get Free Quote Review the key operating ranges for creating repeatable laboratory seals and comparing sealing conditions. ← Swipe to compare all specifications → C630H Heat Seal Tester — Key Specifications | Specification | Value | | Sealing temperature | Room temperature – 300°C | | Sealing pressure | 0.1 – 0.7 MPa | | Pressure resolution | 0.001 MPa | | Dwell time | 0.1 – 999.99 s | | Temperature resolution | 0.1°C | | Temperature fluctuation | ±0.2°C | | Temperature accuracy | ±0.5°C (single-point calibration) | | Temperature gradient | ≤20°C | | Gas supply pressure | 0.7 MPa (external supply required) | | Port connection | Φ8 mm PU tubing | | Sealing area | 40 × 10 mm | C630H Heat Seal Tester Key Specifications Sealing temperatureRoom temp – 300°C Sealing pressure0.1 – 0.7 MPa Pressure resolution0.001 MPa Dwell time0.1 – 999.99 s Temp. resolution0.1°C Temp. fluctuation±0.2°C Temp. accuracy±0.5°C (single-point) Temp. gradient≤20°C Gas supply pressure0.7 MPa (ext. supply req.) Port connectionΦ8 mm PU tubing Sealing area40 × 10 mm **Measuring strength after the seal cools?** The C630H prepares the specimens. Test their cooled seal strength separately on a [compatible tensile or seal-strength tester](https://flexitest.in/packaging-testing-equipments/utm-packaging-industry/c610h-auto-tensile-tester/). We'll confirm the latest configuration, sample compatibility and required accessories with your quotation. ## C632M Hot Tack Tester for FFS Packaging Films ![Labthink C632M hot tack tester with 50 N load cell](https://flexitest.in/wp-content/ uploads/2025/05/C632M-Packaging-product-banner-new-1536x597-1.webp "Heat Seal & Hot Tack Testers for Flexible Packaging 10") ![C632M Hot Tack Tester packaging M](https://flexitest.in/wp-content/uploads/2026/ 09/C632M-Hot-Tack-Tester-packaging-M.webp "Heat Seal & Hot Tack Testers for Flexible Packaging 11") ![C632M hot tack tester for flexible packaging films](https://flexitest.in/wp-content/ uploads/2025/05/C632M-Packaging-inner-bg-e1747224789146.webp "Heat Seal & Hot Tack Testers for Flexible Packaging 12") Find out whether a fresh seal can withstand filling and transfer before it cools. The Labthink C632M creates the seal, waits for a programmed delay and measures hot- tack force with a 50 N load cell. Use it for film selection, supplier or batch qualification and troubleshooting seals that open during filling, dropping or conveyor transfer on vertical or horizontal form-fill-seal lines. Labthink lists ASTM F1921 and GB/T 34445 for this model. Get Free Quote #### Submit Your Details to Download Brochure! Name Email Phone Number Company Name Company Location By clicking the button, I agree and consent to the company’s [Privacy Policy](https://flexitest.in/privacy-policy) automatic-statistics-of-test Simple-clamping-method Fully-Automatic-Test-Process ## C632M Applications & Key Features * Set the sealing pressure and temperature, then feed the specimen automatically for a repeatable test sequence. * A protective cover, observation window, preload fixtures and pneumatic clamping support safe, consistent sample handling. * A 7-inch touchscreen, AC servo drive, automatic data saving and over-limit warnings simplify routine operation. * Suitable for PE-, PP- and PET-based films, sheets and composites; supports ASTM F1921 and GB/T 34445 methods listed by Labthink. Get Free Quote Check the force range, sealing settings and sample dimensions for your hot-tack tests. ← Swipe to compare all specifications → C632M Hot Tack Tester — Key Specifications | Specification | Value | | Load-cell capacity | 50 N | | Force resolution | 0.001 N | | Sealing temperature | Room temperature – 250°C | | Temperature fluctuation | ±0.2°C | | Sealing pressure | 0.05 – 0.7 MPa | | Test speed | 1,500 mm/min; 2,000 – 12,000 mm/min | | Dwell time | 0.1 – 999.9 s | | Delay time | 0.01 – 999.99 s | | Sealing jaw dimensions | 100 × 10 mm | | Fixture separation | 350 mm | | Sample width | 15, 25 or 25.4 mm | C632M Hot Tack Tester Key Specifications Load-cell capacity50 N Force resolution0.001 N Sealing temperatureRoom temperature – 250°C Temperature fluctuation±0.2°C Sealing pressure0.05 – 0.7 MPa Test speed1,500 mm/min; 2,000 – 12,000 mm/min Dwell time0.1 – 999.9 s Delay time0.01 – 999.99 s Sealing jaw dimensions100 × 10 mm Fixture separation350 mm Sample width15, 25 or 25.4 mm **Testing strength after cooling?** Use a [compatible tensile or seal-strength tester](https://flexitest.in/packaging-testing-equipments/utm-packaging-industry/c610h-auto-tensile-tester/) for cooled-seal measurements. We'll confirm the latest configuration, sample compatibility and required accessories with your quotation. C630H vs C632M ## Choose the test your lab needs C630H creates controlled seals. C632M measures force before the seal cools. ![Labthink C630H heat seal tester](https://flexitest.in/wp-content/uploads/2025/ 04/C630H-e1745821586404.webp "Heat Seal & Hot Tack Testers for Flexible Packaging 13") Choose C630H when ### Set the sealing window C630H Heat Seal Tester Control temperature, pressure and dwell time, or prepare seals for separate cooled- strength testing. **Best fit:** film development [View C630H specifications ](https://flexitest.in/packaging-testing-equipments/heat-seal-hot-tack-tester-machines/#c630h-heat-seal-tester) ![Labthink C632M hot tack tester](https://flexitest.in/wp-content/uploads/2024/08/ labthink-c632m-hot-tack-tester.jpg "Heat Seal & Hot Tack Testers for Flexible Packaging 14") Choose C632M when ### Test the seal before it cools C632M Hot Tack Tester Measure hot-tack force when packs open before cooling during filling, dropping or transfer. **Best fit:** VFFS/HFFS failures [View C632M specifications ](https://flexitest.in/packaging-testing-equipments/heat-seal-hot-tack-tester-machines/#c632m-hot-tack-tester) Still unsure? Share your laminate, line speed and when the seal opens. [Get a test recommendation ](https://flexitest.in/packaging-testing-equipments/heat-seal-hot-tack-tester-machines/#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjUwOTU2IiwidG9nZ2xlIjpmYWxzZX0%3D) ## Frequently Asked Questions Heat seal and hot tack tester selection for flexible packaging. What is the difference between heat-seal and hot-tack testing? Heat-seal testing helps you find the temperature, pressure and dwell time needed to make a consistent seal. Hot-tack testing checks how strong that seal is immediately after it forms, before it cools. Does the C630H measure seal strength? No. The C630H creates controlled seal samples. Once the samples have cooled, measure their seal strength on a suitable tensile or seal-strength tester. If you need force measurement before the seal cools, consider the C632M. Which tester is better for a high-speed form-fill-seal line? Choose the C632M when seals open during filling, dropping or transfer before they cool. Choose the C630H when you need to establish a stable temperature-pressure- dwell sealing window. Some development projects use both. Do I need the C630H, C632M or both? Choose the C630H to create repeatable laboratory seals and establish sealing conditions. Choose the C632M to measure hot-tack force before the seal cools. Use both when you need to study seal formation as well as fresh-seal performance. What materials can I test? C630H applications include plastic and composite films, coated paper, coextruded and aluminized films, foil composites, patterned films and flexible plastic tubes. C632M applications include plastic films, sheets and composites such as PE-, PP- and PET-based packaging films. Which test standards are relevant to the C630H Heat Seal Tester? Labthink lists [ASTM F2029](https://store.astm.org/f2029-16r21.html), [QB/T 2358](https://std.samr.gov.cn/hb/search/stdHBDetailed?id=8B1827F1971BBB19E05397BE0A0AB44A) and YBB 00122003 for the [C630H](https://en.labthink.com/en-us/product/c630h-heat-seal-tester.html). ASTM F2029 covers making controlled laboratory heat seals to evaluate heat sealability; seal strength is measured separately. Share your material and target standard, and we'll help confirm the right test setup. Which test standards are relevant to the C632M Hot Tack Tester? Labthink lists [ASTM F1921](https://store.astm.org/f1921_f1921m-12r23.html) and [GB/T 34445](https://openstd.samr.gov.cn/bzgk/std/newGbInfo?hcno=394BDEE8FC7210F39DD89943E6DE5E0D) for the [C632M](https://en.labthink.com/en-us/product/c632m-hot-tack-tester.html). These methods are relevant to hot-tack performance. Share your film structure and packaging-line conditions, and we'll help confirm the appropriate method and settings. What does each tester control and measure? The C630H controls sealing temperature, pressure and dwell time to prepare repeatable seal samples. The C632M also controls the delay and test speed, then measures hot- tack force with a 50 N load cell. What should I send for a test recommendation? Share your film or laminate structure, sealant layer, pack type, current sealing settings, line speed and the point where the seal fails. Include the required test standard if you already know it. [ Heat seal popup asset loader ](https://flexitest.in/packaging-testing-equipments/heat-seal-hot-tack-tester-machines/#elementor-action%3Aaction%3Dpopup%3Aopen%26settings%3DeyJpZCI6IjUwOTU2IiwidG9nZ2xlIjpmYWxzZX0%3D) ## Related Machines [⌊C610H Auto Tensile Tester⌉⌊C610H Auto Tensile Tester⌉[ [C610H Auto Tensile Tester](https://flexitest.in/packaging-testing-equipments/utm-packaging-industry/c610h-auto-tensile-tester/) Advanced UTM for packaging applications, compliant with ISO 37, ASTM E4, D882, D1938, D3330, F88 & F904. [View Details ](https://flexitest.in/packaging-testing-equipments/utm-packaging-industry/c610h-auto-tensile-tester/) [⌊Rub Tester RT-01⌉⌊Rub Tester RT-01⌉[ [Rub Tester RT-01](https://flexitest.in/packaging-testing-equipments/film-laminate-mechanical-properties-test/rub-tester-rt-01/) RT-01 tests abrasion resistance of inks & coatings with dry/wet rub modes, dual stations, compliant with ASTM D5264 & TAPPI T830. [View Details ](https://flexitest.in/packaging-testing-equipments/film-laminate-mechanical-properties-test/rub-tester-rt-01/) [⌊Thickness Tester C640⌉⌊Thickness Tester C640⌉[ [Thickness Tester C640](https://flexitest.in/packaging-testing-equipments/film-laminate-mechanical-properties-test/thickness-tester-c640/) C640 delivers precise automated thickness testing with high-precision sensing, compliant with ISO 4593, ASTM D6988, F2251 & D374. [View Details ](https://flexitest.in/packaging-testing-equipments/film-laminate-mechanical-properties-test/thickness-tester-c640/) [⌊Leak and Seal Strength Tester C660B⌉⌊Leak and Seal Strength Tester C660B⌉[ [Leak and Seal Strength Tester C660B](https://flexitest.in/packaging-testing-equipments/package-leak-tester/) C660B performs precise package leak testing by negative pressure, with intelligent vacuum control, compliant with ASTM D3078 & GB/T 15171. [View Details ](https://flexitest.in/packaging-testing-equipments/package-leak-tester/)