Name: Spiral Dryer Fabric — Spiral Coil Series — PAPTEX-SP-2200
Brand: PAPTEX
SKU: PAPTEX-SP-2200

Question 1

What paper grades is the Spiral Coil Series designed for?

PAPTEX Engineering Team · Accepted Answer

The Spiral Coil Series is optimized for heavy-weight paper grades: packaging (80–200 g/m²), kraft (80–300 g/m²), corrugated medium and linerboard (100–300 g/m²), testliner (100–200 g/m²), fluting (100–180 g/m²), duplex board (200–500 g/m²), and white board (200–450 g/m²). The high open area (20–30%) provides the moisture removal capacity these heavier grades require. For lightweight grades below 80 g/m² (tissue, fine paper), our Flat Yarn Series provides better sheet support.

Question 2

What machine speed range is the Spiral Coil Series suitable for?

PAPTEX Engineering Team · Accepted Answer

300–1,000 m/min for standard polyester (PET) coils. At speeds above 800 m/min, we recommend PPS (polyphenylene sulfide) coils for improved dimensional stability at high temperatures. For machines exceeding 1,000 m/min, contact our engineering team — we may recommend a flat yarn or hybrid construction depending on your dryer section configuration and paper grade.

Question 3

How do I choose between spiral coil and flat yarn dryer fabric?

PAPTEX Engineering Team · Accepted Answer

The decision is primarily driven by paper grade weight and moisture removal requirements. Choose Spiral Coil if: (a) your paper grade is ≥ 80 g/m², (b) moisture removal rate is your machine speed bottleneck, (c) you experience contamination buildup on flat yarn fabrics. Choose Flat Yarn if: (a) your paper grade is ≤ 80 g/m² (tissue, fine paper), (b) sheet surface quality is critical (spiral fabrics can mark lightweight sheets), (c) you need the highest possible surface contact area. Send us your machine parameters and current pain points — our application engineer will provide a specific recommendation within 24 hours.

Question 4

What coil diameter should I specify for my machine?

PAPTEX Engineering Team · Accepted Answer

Coil diameter selection depends on paper grade weight and dryer section position. General guidance: 1.5–2.0 mm for 80–150 g/m² grades; 2.0–2.8 mm for 150–300 g/m² grades; 2.5–3.5 mm for 300–500 g/m² grades. Larger coil diameter = higher open area = more air flow, but also more surface marking potential. Our application engineer calculates the optimal coil diameter using your machine parameters (speed, steam pressure, paper grade, GSM range). This is included in every quotation.

Question 5

What is the typical service life of a spiral dryer fabric?

PAPTEX Engineering Team · Accepted Answer

In packaging/kraft applications at 400–800 m/min: 8–14 months for PET coils, 10–16 months for PPS coils. In corrugated/linerboard at 300–700 m/min: 10–16 months for PET, 12–18 months for PPS. Actual life depends on steam temperature, contamination level (stickies, fillers), cleaning schedule, and tension consistency. Spiral fabrics typically outlast flat yarn fabrics in heavy-grade applications because the open coil structure is less prone to contamination-driven degradation.

Question 6

Can the Spiral Coil Series replace an OEM fabric on my machine?

PAPTEX Engineering Team · Accepted Answer

Yes. We supply spiral dryer fabrics for Valmet, Voith, Bellmer, Toscotec, A.Celli, Recard, Over Meccanica, and ANDRITZ machines. Send us your current fabric specifications (coil diameter, pintle diameter, air permeability, caliper) or a small sample (A4 size). Our lab analyzes the sample and produces a fabric that matches or exceeds each parameter. Reverse-engineering report provided within 5 business days at no charge. Most mills achieve equivalent or better performance on the first trial fabric.

Question 7

What information do you need to provide a quotation for a spiral fabric?

PAPTEX Engineering Team · Accepted Answer

Required: machine brand, model, width (mm), design speed (m/min), paper grade(s), basis weight range (GSM), dryer section position, and steam pressure (bar). Helpful but not required: current fabric specifications (coil diameter, pintle diameter, air permeability, caliper), dryer section layout drawing, current pain points (short life, contamination, insufficient drying, sheet marking). Download our Machine Parameter Submission Form for the complete checklist.

Question 8

Does the spiral coil construction mark the paper sheet?

PAPTEX Engineering Team · Accepted Answer

Spiral fabrics can leave a faint coil pattern on lightweight sheets (≤ 80 g/m²). For grades above 80 g/m², sheet marking is typically not visible and does not affect printability or converting performance. If sheet surface quality is critical, we can: (a) reduce coil diameter (smaller coils = less marking), (b) apply a surface-calendered treatment that smooths the coil contact points, (c) recommend our Flat Yarn Series for the top position while using spiral fabric on lower positions. Discuss your surface requirements when requesting a quotation.

Question 9

How is the spiral fabric joined (seamed) on the machine?

PAPTEX Engineering Team · Accepted Answer

Standard: spiral seam — the fabric ends are joined by inserting a pintle wire through the intermeshing coil loops at both ends. This creates a continuous loop. Installation: (1) the fabric is pulled onto the machine, (2) the two ends are brought together, (3) the pintle wire is inserted through the alternating coil loops, (4) the pintle is locked in place. Spiral seam installation takes 45–90 minutes depending on machine width. Pin seam (faster, 30–60 minutes) and clipper seam are also available. We provide a seam selection guide with every quotation.

Question 10

What causes premature failure of spiral dryer fabrics?

PAPTEX Engineering Team · Accepted Answer

Five common causes: (1) Incorrect pintle wire diameter — undersized pintles elongate under tension, causing seam failure. (2) Contamination buildup inside coils — stickies and fillers pack into the coil interior, reducing air permeability. Spiral fabrics need regular high-pressure water cleaning (unlike flat yarn, the coil interior is accessible). (3) Over-tensioning — spiral fabrics are less elastic than flat yarn fabrics; excess tension causes coil deformation. (4) Chemical attack — some cleaning chemicals degrade PET and PPS. Our installation guide includes a chemical compatibility chart. (5) Guide roll misalignment — causes uneven edge wear. Our installation checklist covers all five with inspection criteria.

Question 11

What cleaning method do you recommend for spiral fabrics?

PAPTEX Engineering Team · Accepted Answer

High-pressure water shower (30–60 bar) is the primary cleaning method — the open coil structure allows water to penetrate and flush out contaminants. Frequency: every 1–2 weeks for standard operation, every 3–5 days for high-contamination grades (recycled fiber, OCC). Chemical cleaning: alkaline detergent for organic contaminants (stickies, pitch), acid detergent for inorganic deposits (calcium carbonate scale). See our Installation & Maintenance Guide for the complete chemical compatibility chart. Never use solvents containing phenol or chlorinated hydrocarbons — they degrade PET and PPS monofilament.

Question 12

How is the spiral fabric packed for international shipping?

PAPTEX Engineering Team · Accepted Answer

Each fabric is rolled on a 200 mm rigid PVC core (larger than flat yarn cores to prevent coil deformation during transport), wrapped in moisture-barrier polyethylene film, labeled with order number, dimensions, position, coil diameter, pintle type, seam type, and running direction arrow. Packed in reinforced plywood crate with desiccant packs. Crates are fumigated (ISPM 15 compliant). Standard crate weight: 100–300 kg depending on fabric size. Critical: spiral fabrics must be stored horizontally before installation — vertical storage can cause coil compression and permanent deformation. This is clearly marked on the crate.

Question 13

How long does installation of a spiral fabric take?

PAPTEX Engineering Team · Accepted Answer

Typical installation: 3–5 hours for a single dryer section position (from lifting to running tension). This includes: lifting onto machine (15–30 min), threading through dryer section (30–60 min), pintle insertion and seaming (45–90 min), tensioning and alignment (45–60 min), break-in run at reduced speed (24–48 hours at 80% normal tension). Spiral fabrics take approximately 1–2 hours longer than flat yarn fabrics due to pintle insertion. Full-speed operation after break-in. We provide a step-by-step installation checklist with pintle insertion diagrams.

Question 14

What is the minimum order quantity for a spiral dryer fabric?

PAPTEX Engineering Team · Accepted Answer

1 piece per size. Each spiral fabric is custom-manufactured to your exact machine dimensions, coil diameter, and pintle specification. No minimum beyond this. Single-position orders accepted. Multi-position orders benefit from consolidated packing and shipping.

Question 15

What temperature can the spiral fabric withstand?

PAPTEX Engineering Team · Accepted Answer

Standard PET (polyester) monofilament coils: continuous 180°C, peak 200°C (intermittent, ≤ 15 minutes). PPS (polyphenylene sulfide) monofilament coils: continuous 220°C, peak 240°C (intermittent, ≤ 15 minutes). For dryer sections above 220°C, contact our engineering team — PEEK monofilament (rated to 250°C continuous) is available for special applications. Specify your maximum dryer temperature and steam pressure when requesting a quotation.

Question 16

Can I get PPS (high-temperature) spiral fabric?

PAPTEX Engineering Team · Accepted Answer

Yes. PPS (polyphenylene sulfide) spiral fabrics are available for dryer sections operating above 180°C. PPS provides: continuous operating temperature 220°C (vs 180°C for PET), better dimensional stability at high temperatures, and improved chemical resistance (acids and alkalis). PPS costs approximately 40–60% more than PET. Delivery lead time is the same (15–25 days). PPS is recommended for kraft and linerboard machines where dryer temperatures regularly exceed 170°C. Specify PPS when requesting a quotation if your dryer temperature exceeds 180°C for any position.

Question 17

How do I measure my machine for a new spiral fabric order?

PAPTEX Engineering Team · Accepted Answer

We need: (1) Machine width — the face width of the dryer roll (mm). (2) Fabric length — the total loop length measured along the fabric path in the dryer section (m). For spiral fabrics, length measurement is critical — coils have less stretch than flat yarn weaves, so length must be accurate within ± 0.5%. (3) Current fabric type and specifications (if replacing). If you have the current fabric drawing or a paper machine layout diagram, send it and we calculate the dimensions. If not, use our Machine Parameter Submission Form — it includes a measurement guide with diagrams.

Question 18

What quality inspections does each spiral fabric undergo?

PAPTEX Engineering Team · Accepted Answer

20+ inspection points per fabric: raw material (monofilament diameter, tensile strength, elongation — for both coil and pintle wires), in-process (coil geometry uniformity, pintle insertion quality, visual defects), post-production (air permeability ISO 9237 at 12 points across width, caliper ISO 9073-2 at 12 points, tensile strength ISO 13934-1 for both warp and weft, seam strength test with actual pintle wire, dimensional check ± 0.5% of ordered length), pre-shipment (visual final inspection, packing integrity). Quality certificate and lot-specific test report shipped with every order.

Question 19

Can I visit the factory to inspect spiral fabric production?

PAPTEX Engineering Team · Accepted Answer

Yes. Factory visits can be scheduled with 2 weeks notice. You will see: TEXO (Sweden) high-speed weaving and coiling looms, JAGER (Germany) automated heat-setting line, coil geometry inspection station, pintle wire quality control, quality inspection laboratory, R&D testing center, packing and shipping area. Address: Industrial Park, Shenqiu County, Zhoukou City, Henan Province, China. Nearest international airport: Zhengzhou Xinzheng (CGO), approximately 2.5 hours by car. Hotel and transfer arranged on request.

Question 20

What is your warranty policy for spiral dryer fabrics?

PAPTEX Engineering Team · Accepted Answer

Standard: the fabric is guaranteed to meet the agreed specifications (air permeability, caliper, tensile strength, dimensional accuracy) at the time of shipment. If a fabric fails before its expected service life, we analyze the returned sample (free) and provide a failure analysis report within 10 business days. If the failure is due to a manufacturing defect, we provide a replacement fabric at no charge or a pro-rated credit toward the next order. If the failure is due to operational factors (over-tension, chemical damage, mechanical impact), we provide recommendations to prevent recurrence — this report alone often saves mills more than the fabric cost in avoided downtime.

Question 21

How does your spiral fabric compare to Albany International's spiral fabric?

PAPTEX Engineering Team · Accepted Answer

Albany: publicly traded (NYSE: AIN), the largest PMC supplier globally, significant R&D investment. PAPTEX: factory-direct, no distributor margin, same PET and PPS monofilament grades, same spiral coil manufacturing process (polygonal coiling + pintle insertion + heat-setting). Key operational differences: (a) custom coil diameter per order — we do not use fixed standard coils; (b) caliper tolerance ± 0.08 mm across full width; (c) 15–25 day delivery vs 30–45 days; (d) direct engineer communication throughout the order process. We have supplied spiral fabrics to mills that previously used Albany — contact us for a reference.

Question 22

What are your payment terms?

PAPTEX Engineering Team · Accepted Answer

Standard: 30% T/T deposit with order confirmation, 70% before shipment. L/C at sight: available for orders above USD 10,000. Long-term customers (> 3 orders): flexible payment schedule available. All prices quoted FOB Shanghai or CIF destination. Pro forma invoice issued within 24 hours of order confirmation.

Brand	Compatible Models	Typical Width	Typical Speed
Valmet	DryRun, SymRun	3,500 – 8,600 mm	up to 1,000 m/min
Voith	DryStar, MasterRun, ProDry	3,000 – 7,800 mm	up to 950 m/min
Bellmer	Dryer Section Standard, TurboDryer	2,500 – 5,500 mm	up to 800 m/min
Toscotec	TT Dryer	2,800 – 6,000 mm	up to 1,200 m/min
A.Celli	AC-Dryer Series	2,500 – 5,600 mm	up to 1,000 m/min
Recard	Dryer Section	2,200 – 4,800 mm	up to 900 m/min
Over Meccanica	OM-Dryer	2,400 – 5,200 mm	up to 950 m/min
ANDRITZ	PrimeDry	3,000 – 8,000 mm	up to 1,100 m/min

Material	100% Polyester (PET) Monofilament. PPS (Polyphenylene Sulfide) available for high-temperature applications.
Construction	Polygonal spiral coils connected by monofilament pintle wires
Air Permeability	600 – 900 CFM (at 125 Pa, ISO 9237)
Open Area	20 – 30% (coil geometry dependent)
Continuous Operating Temperature	Up to 180°C (PET) / Up to 220°C (PPS)
Peak Temperature	200°C (PET, ≤ 15 minutes) / 240°C (PPS, ≤ 15 minutes)
Tensile Strength (Warp)	≥ 60 kN/m
Tensile Strength (Weft)	≥ 35 kN/m

Spiral Dryer Fabric — Spiral Coil Series

Paper Grades & Machine Conditions

Paper Grades

Machine Types

Operating Range

Compatible Paper Machine Brands & Models

Complete Technical Parameters

Differentiation & Selection Guide

vs Other PAPTEX Models

vs Competitor Alternatives

Technical Documents

Spiral Dryer Fabric — Technical Datasheet

Spiral Dryer Fabric — Installation & Maintenance Guide

Machine Parameter Submission Form

PAPTEX Spiral Dryer Fabric Spiral Coil Series — Technical Datasheet

PAPTEX Spiral Dryer Fabric — Installation & Maintenance Guide

PAPTEX Spiral Dryer Fabric — Machine Parameter Submission Form

Procurement Questions

Request Spiral Fabric Recommendation