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Product Description
Every processor of PLA, PET, TPU, and similar materials has met the same frustrating failure. The material goes into the dryer looking normal — dry pellets, clean surface, ready for the next step. A few hours later, the hopper contains not pellets but a fused, sticky mass: pellets welded together into clumps, bridging across the hopper, blocking the material flow, and refusing to feed the process.
This is not a machine malfunction. It is the physical behavior of easy-to-adhesion polymers. PLA, PET, and TPU are semi-crystalline materials that arrive from the producer in a largely amorphous state. When amorphous polymer is heated toward and above its glass transition temperature (Tg), the surface softens. The softened surfaces of neighboring pellets press together and bond — and the result is the sticky blocks that stop the line.
The conventional response — "just dry it hotter and longer" — makes the problem worse. More heat means more surface softening, more adhesion, more bridging. A dryer that cannot first stabilize the material is not solving the problem; it is baking the pellets into a single block.
The engineering answer is crystallization before drying. Crystallization converts the amorphous structure into a crystalline one: the material becomes cloudy and hard, the pellet surface stiffens, and the polymer loses its tendency to fuse. Once the material is crystallized, it can be dried safely, conveyed reliably, and fed to the process without blockage.
The is a dedicated crystallization machine. Its core component is the crystallization tower, which acts as the pre-dryer of the process: it brings the amorphous, easy-to-adhesion polymer to a stable crystalline state before the material goes any further.
Material Inlet (amorphous PLA / PET / TPU pellets) │ ▼ [Crystallization Tower (Pre-dryer)] │ Material is held above the glass transition │ temperature for 1-2 hours │ Amorphous regions crystallize and harden │ Pellet surfaces stiffen — no more adhesion ▼ [Fully Crystallized Material] │ Degree of crystallinity reaches the predetermined target │ Sticky blocks eliminated ▼ [Downstream Process] │ Blending modification │ Sheet / Plate / Film production │ Product molding / Injection molding ▼ [Finished: crystallized, free-flowing, process-ready polymer]
In the crystallization tower, the material is heated in a controlled manner to a temperature above the glass transition temperature of the polymer. This is the temperature window in which the amorphous structure begins to reorganize into a crystalline lattice — and, critically, the window in which uncontrolled heating causes the sticking problem. The holds the material in this window deliberately and uniformly, so the crystallization happens in the ordered way the polymer needs, not as a side effect of careless heating.
Over 1-2 hours, the amorphous regions of the polymer crystallize. The change is visible and physical: the pellets become opaque, the structure hardens, and the surface stiffness increases. The degree of crystallinity reaches the predetermined target — the machine's defined crystal effect. The material no longer softens and bonds at drying temperature; it is now safe to dry, to store, and to handle.
The crystallized material leaves the tower as free-flowing pellets — no clumps, no bridges, no stuck mass. It is now ready to be supplied to the downstream process: a blending modification line, a sheet or plate line, a film line, a product molding line, or an injection molding machine. Because the crystallization was completed in the tower, the downstream drying and processing steps no longer have to fight the adhesion problem.
The is a crystallizer, the essential first step for easy-to-adhesion polymers. It does not replace a dehumidifying dryer — it enables it. Once PLA, PET, or TPU has been crystallized in the , it can be dried safely in a dehumidification dryer or fed directly to processes that do not require deep drying. For processors who run these materials, the is the machine that makes every later step possible.
The crystal dryer is a compact, laboratory- and small-batch-grade crystallization machine:
| Parameter | Value |
|---|---|
| Model | |
| Product name | Crystal Dryer |
| Application | Crystallization drying process for polymers |
| Processing capacity | Max. 5 kg/h |
| Crystallization time | 1-2 hours |
| Pre-dryer | Crystallization tower |
| Crystal effect | The degree of crystallinity reaches the predetermined target |
| Application field | Blending modification, sheet, plate, film, product, injection molding, etc. |
| Applicable materials | PLA, PET, TPU, and other easy-to-adhesion polymers |
The specifications above are the verified ratings. For different throughputs or additional requirements, the and optional configurations are available, with custom sizing on request. Chenxing's engineering team will recommend the crystallization tower configuration and the downstream drying arrangement that matches your material and your process — whether you run a laboratory, a research center, or a small multi-product production line.
Feature: The 's crystallization tower hardens the pellet surface before any further heating, preventing the adhesion and fusion that plague easy-to-adhesion polymers.
Advantage: PLA, PET, and TPU pellets leave the tower as free-flowing, individual particles instead of fused clumps.
Benefit: No blocking, no bridging, no downtime from stuck material. The material feeds the process smoothly and the production line keeps running.
Feature: After 1-2 hours in the crystallization tower, the degree of crystallinity reaches the predetermined target — the machine's verified crystal effect.
Advantage: Crystallization is completed to a defined level, not left to chance, so the material's structure is consistent batch after batch.
Benefit: Stable material properties, better mechanical strength, and improved dimensional stability in the molded or formed product. The same crystallized quality every time.
Feature: The is rated for a maximum processing capacity of 5 kg/h.
Advantage: The small capacity is matched to laboratory, research, and small-batch work, where the material demand is measured in kilograms, not tons.
Benefit: Low raw-material consumption and fast formula switching. Researchers can crystallize small samples without wasting resin, and small workshops can prepare exactly the batch they need.
Feature: The uses a dedicated crystallization tower as its pre-dryer, designed specifically for the temperature and dwell time that crystallization requires.
Advantage: Temperature is controlled uniformly across the material bed, avoiding the local overheating that degrades sensitive polymers.
Benefit: Consistent crystallinity without thermal damage — every pellet receives the same treatment, and the material quality is uniform.
Feature: The completes crystallization in 1-2 hours, on a predictable cycle.
Advantage: Material moves through the crystallization stage quickly and reliably, with a cycle time the operator can plan around.
Benefit: Shorter waiting time between material preparation and processing, higher throughput for research and small-batch production, and faster feedback in product development.
Feature: The serves blending modification, sheet, plate, film, product, and injection molding processes.
Advantage: One crystallizer prepares material for the full range of downstream applications, from compounding to forming to molding.
Benefit: A single investment covers multiple processes. The same supplies crystallized PLA for a sheet trial in the morning and crystallized PET for an injection run in the afternoon — high return on the equipment.
Feature: The is designed specifically for easy-to-adhesion polymers — PLA, PET, TPU, and similar semi-crystalline materials that ordinary dryers cannot handle without sticking.
Advantage: The machine targets the adhesion problem at its root, by crystallizing the material before the surface can soften and bond.
Benefit: Processors can work with difficult, high-value materials that would otherwise be impossible to dry and feed reliably — expanding the range of products they can offer.
Feature: The is built as a compact, durable machine sized for laboratories and small workshops.
Advantage: Small footprint, easy installation, and straightforward operation and maintenance.
Benefit: Flexible placement in the lab or the workshop, low maintenance effort, and dependable long-term service — a practical machine for demanding environments.
The is the machine that stands between the bag of amorphous pellets and the process that needs stable material. It is used wherever easy-to-adhesion polymers must be prepared reliably.
For researchers developing PLA, PET, and TPU formulations, the provides controlled crystallization at a scale that matches the work. A 5 kg/h machine crystallizes the samples for compounding trials, film casting tests, and injection experiments — with enough material for a real run and little waste. The repeatable crystal effect means the laboratory results can be trusted: if the crystallinity reaches the predetermined target in the pilot run, it will reach the same target in production.
Small production lines that switch between products — a sheet run today, a film trial tomorrow, an injection batch next week — need material preparation that can switch just as fast. The 's compact design and small capacity fit this pattern exactly: crystallize what the current job needs, switch the material, and crystallize the next. The machine does not lock the workshop into one product; it serves the whole mix.
Chenxing supplies the full family of crystallization and drying equipment. Each machine has its own role:
| Application | Recommended Machine | Core Function | Best For |
|---|---|---|---|
| Easy-to-adhesion polymers, small capacity | crystal dryer (this page) | Crystallization tower (pre-dryer), 1-2 h, crystallinity to predetermined target | PLA, PET, TPU — lab and small batches, blending sheet plate film product / injection |
| Semi-crystalline polymers, conveying integrated | 201A/J conveying integrated crystal dehumidification dryer | Crystallization + dehumidification drying + conveying, air or nitrogen | PET, PLA, PBT, PETG — max 100 kg/h, laboratory and injection molding |
| Hygroscopic polymers, large capacity | dehumidifying dryer | Low-dew-point dehumidification air, independent barrel temperature control | PET, PA, PLA, PC, TPU, PEEK — 20-100 ppm, max 5 t/h, large pelletizing and extrusion lines |
| General pellets, hot-air drying | STG-U hopper drier / plastic resin dryer | Hot-air drying | Surface-moisture drying of general plastics, PVC, ABS, standard pellets |
The four machines form a complete answer to the question "how should my material be prepared?" Easy-to-adhesion, semi-crystalline polymers in small quantities start with the — crystallize first, then dry or process. Semi-crystalline polymers in larger laboratory and injection quantities move to the 201A/J, which adds dehumidification drying and conveying. Hygroscopic engineering polymers at industrial tonnage use the . General pellets with only surface moisture are served by the STG-U hot-air drier. Each machine solves the specific problem it was designed for.
The works alongside the complete Chenxing material handling ecosystem. Crystallized material moves to the process with the same conveying equipment used across the plant — a screw feeder automatic feeding machine for pellets, a VLF powder suction machine or VLF-L continuous powder suction machine for powders, and an FSP crushing material suction machine where regrind returns to the process. Where formulations are blended after crystallization, a high-speed mixer industrial mixer compounds the recipe. Where the workshop reclaims its own scrap, plastic crushers and the agglomerator film densifier handle recovery, and a CJ magnetic frame hopper magnet protects the process at the feed point. Where milled powders are required, PVC disc pulverizers, dual disc pulverizers, and SMP knife pulverizers supply the powder fraction, and a vibrating screen classifies the material. Whatever the surrounding equipment, the 's role is constant: crystallize the easy-to-adhesion polymer so every downstream step can run without sticky blocks.
A crystal dryer crystallizes the material — it holds amorphous, easy-to-adhesion polymers above their glass transition temperature so the structure hardens and the pellets stop sticking. The 201A/J conveying integrated crystal dehumidification dryer and the dehumidifying dryer remove moisture from the material with low-dew-point air. For PLA, PET, and TPU, the crystallization comes first: an uncrystallized pellet will stick and block the dryer, so the crystallization stage is what makes safe drying possible. The is that crystallization stage, delivered as a dedicated, compact machine.
Because these are semi-crystalline, easy-to-adhesion polymers. As-received material is largely amorphous. When it is heated toward and above the glass transition temperature, the pellet surfaces soften and bond to neighboring pellets, producing fused clumps that bridge and block the hopper. This is why simply drying hotter makes the problem worse. Crystallization solves it: holding the material above Tg for 1-2 hours converts the amorphous structure to a crystalline one, hardening the surfaces so the pellets no longer adhere. The performs this crystallization in its crystallization tower.
It is the 's verified crystal effect: after the 1-2 hour crystallization cycle in the tower, the material reaches a defined level of crystallinity — the target that the machine and Chenxing's engineers set for the polymer being processed. Reaching this target is what guarantees the material is safe to dry, handle, and feed: the surfaces are hardened, the adhesion tendency is gone, and the material properties are stable. The predetermined target gives the processor a measurable quality gate instead of relying on guesswork.
The is rated for a maximum processing capacity of 5 kg/h. This is a laboratory- and small-batch-grade capacity, matched to research centers, pilot lines, and small multi-product workshops where the material demand is measured in kilograms. For larger quantities, the 201A/J conveying integrated crystal dryer handles up to 100 kg/h with crystallization plus dehumidification drying, and the serves industrial tonnage. The and optional configurations are available, with custom sizing on request.
The serves blending modification, sheet, plate, film, product, and injection molding — the application fields listed on the machine. Crystallized PLA, PET, or TPU can be compounded in a blending line, cast into sheet or plate, extruded into film, formed into products, or molded by injection. Because crystallization is the preparation step common to all of these processes, one can feed several different downstream applications, giving a small workshop the flexibility to switch products without changing its material preparation equipment.
Yes — this is the intended workflow for materials that need both crystallization and deep drying. The crystallizes the material first, eliminating the sticking problem, and the crystallized material can then be dried in a dehumidification dryer to reach the low moisture levels that demanding processes require. Chenxing offers machines that combine the two stages: the 201A/J conveying integrated crystal dehumidification dryer integrates crystallization, dehumidification drying, and conveying in one unit, while the serves as the dedicated crystallization stage for setups that separate the steps.
Yes. With a maximum capacity of 5 kg/h and a compact, durable design, the is built for exactly this duty. It crystallizes small samples for research and development, prepares small batches for pilot production, and switches materials quickly for multi-product workshops. The repeatable crystal effect means laboratory results translate reliably to production, and the low capacity keeps raw material consumption and waste to a minimum.
Step 1 — Tell Us Your Material and Application: Share the polymers you process (PLA, PET, TPU, or other easy-to-adhesion materials), your batch size, and the downstream process — blending modification, sheet, plate, film, product, or injection molding. If you plan to combine crystallization with dehumidification drying, tell us your moisture requirement as well.
Step 2 — Get a Sized Recommendation: Chenxing specifies the crystallization solution: the crystallization tower configuration, cycle settings for your material, and the downstream drying or feeding arrangement that completes the preparation chain. You receive a clear equipment list and process recommendation — whether the works alone or feeds into a dehumidifying dryer or another preparation step.
Step 3 — Request a Quote from Nicole: Contact Nicole at +8615951187228 or ceo@cxsljx.com with your material details and application. We respond within 24 hours with a formal quotation, delivery schedule, and configuration options. Chenxing provides installation guidance, commissioning support, and operator training on crystallization temperature control, cycle setting, and process integration.
Step 4 — No More Sticky Blocks, Full Crystallization, from Day One: After installation, the starts delivering what its slogan promises — eliminate sticky blocks, meet full crystallization. PLA, PET, and TPU leave the tower free-flowing and fully crystallized, feed the process without blockage, and produce parts with stable strength and dimensions. Material preparation stops being the problem and becomes the advantage.
For the complete material handling ecosystem, Chenxing also supplies: the 201A/J conveying integrated crystal dehumidification dryer for crystallization plus drying with conveying, the STG-U hopper drier plastic resin dryer for hot-air drying of general pellets, VLF powder suction machines and VLF-L continuous powder suction machines for powder conveying, FSP crushing material suction machines for regrind, screw feeders automatic feeding machines for pellet transfer, high-speed mixers for compounding, PVC disc pulverizers for milling, plastic pelletizers and PVC hot-cutting pelletizing lines for pellet production, parallel co-rotating twin screw extruders for compounding, and complete lines from PVC shelf label strip extrusion to PVC UV marble sheet making. As a single-source partner, Chenxing Machinery supports every step from polymer to finished product.
Contact Chenxing Machinery Today:
Contact Person: Nicole
Phone / WhatsApp: +8615951187228
Email: ceo@cxsljx.com
Company: Zhangjiagang Chenxing Machinery Co., Ltd.
Website: www.chenxingmachinery.com
