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Paper Sheeting Machine Selection Guide: Precise Matching of Paper Type × GSM × Machine Model
Published on 06.05
1.General Paper Classification and Core Cutting Characteristics (Fundamental Basis for Machine Selection)
The core premise of cutting machine selection is to clearly understand the physical properties of paper (stiffness, toughness, coating, fiber structure) and slitting pain points, rather than relying only on GSM. Based on actual industry application scenarios, general paper types are divided into five categories, and their slitting-related core characteristics are defined to provide a basis for machine matching.
1.1 .Light & Flexible Uncoated Paper (50–120gsm)
Core Characteristics: Loose fiber structure, extremely low stiffness, light weight, high air permeability, no surface coating. During slitting, it is prone to stretching, wrinkling, and static electricity. Multi-roll unwinding may cause synchronization issues, paper drifting, and rough edges.
Typical Paper Types: Woodfree paper, writing paper, tissue paper, corrugated medium paper, ordinary copy paper, lightweight printing base paper.
1.2. Medium GSM Printing / Ordinary Packaging Paper (120g~250g)
Core Characteristics: Medium stiffness, certain toughness, some paper types have surface coating. During slitting, coating scratches and powder loss may occur. Large roll diameters are prone to deviation, and tension balance in multi-roll unwinding is difficult.
Typical Paper Types: Coated paper, matte paper, ordinary kraft paper, linerboard, lightly coated woodfree paper, tag paper base paper.
1.3. High GSM Rigid Packaging Paperboard (250g~550g)
Core Characteristics: High-density fibers, strong rigidity, thick structure, very high stiffness, almost no elongation. Slitting has high cutting resistance. Standard single-knife machines are prone to edge cracking and compression marks. Multi-roll unwinding may cause excessive machine load.
Typical Paper Types: White cardboard, grey back duplex board, single-side coated kraft board, imitation kraft board, laminated kraft paper, food packaging board.
1.4.Extra Thick Industrial Paperboard / Special Composite Paper(550g~1000g)
Core Characteristics: Multi-layer composite structure, extremely thick, no toughness, brittle, very high self-weight. Slitting has extremely high cutting load, vibration, and cutting deviation. Standard knife shafts are prone to deformation and can only operate at low speed with single roll.
Typical Paper Types: Grey board, double grey board, industrial paperboard, composite aluminum foil paper, high-end metallic paperboard, extra-thick rigid box board.
1.5. Special Application Paper (120g–400g, selection based on stiffness equivalent to similar GSM paper types)
Core Characteristics: Surface has plastic film (lamination), moisture-proof coating, or surface coating. Slippery, and prone to sticking under high temperature. Some paper types have loose winding and are difficult to correct.
Typical Paper Types: Laminated kraft paper, moisture-proof composite paper, tube paper, coated packaging paper, laser paper.
2.Core Performance Analysis of CHM Roll Paper Cutting Machine Models
CHM paper roll to sheet cutting machines are mainly divided into the single-knife paper sheeter series and the double-knife paper sheeter reinforced series. Differences in machine structure and mechanical performance determine their applicable paper grade levels. The core machine models and performance are as follows, providing mechanical principle support for machine selection.
- Working Principle: Single-knife reciprocating straight cutting, fixed knife seat, single cutting action, low mechanical impact and smooth web transport, suitable for low-resistance and flexible paper feeding requirements.
- Core Performance: GSM range 60g–550g (standard model), maximum speed 300 cuts/min and 300 m/min, cutting accuracy ±0.5mm, maximum web width 1400/1700/1900mm, maximum roll diameter 1800mm, unwinding supports 1–5 rolls (decreases as GSM increases).
- Structural Limitations: Limited knife rigidity and low cutting torque, unable to withstand high cutting resistance of heavy paperboard; low pressure from pressing rollers, leading to edge cracking or incomplete cutting when processing thick paper.
- Application Nature: Designed specifically for low-GSM, low-stiffness, and flexible web-running paper. When used for thick paper, various slitting defects are likely to occur.
- Working Principle: Upper and lower dual spiral rotary knives cut against each other, with no mechanical impact and uniform shear force. The knife shaft is thickened, side walls are reinforced, and the frame is overall tempered and strengthened, enabling it to withstand high-resistance cutting requirements.
- Core Performance: GSM range 200g–1000g (heavy-duty reinforced model). The cutting head adopts double rotary knives, with upper and lower knives forming a paired spiral cutting structure. The cutting edge is smooth, without burrs or compression marks. The rigid frame can absorb cutting vibration and is suitable for heavy paper rolls.
- Structural Advantages: High cutting torque, strong vibration resistance, and high rigidity. It effectively solves problems such as edge cracking, compression marks, and cutting deviation in thick paper slitting, and is suitable for high-stiffness and high-thickness paper materials.
- Application Nature: Specifically designed for high-GSM, high-stiffness, and rigid paperboard. When used for thin paper, it may cause wrinkling and slitting loss.
2.3. Core Optional Configurations and Application Scenarios
All optional configurations are designed to address specific paper cutting pain points. When selecting the machine, they must be matched according to paper characteristics. The specific corresponding relationships are as follows:
Optional Configuration | Mechanical Function | Slitting Pain Point Addressed | Applicable Paper Types |
Thin Paper Tension Control System | Closed-loop low tension control to prevent stretching and ensure synchronized feeding | Easy stretching, wrinkling, multi-roll desynchronization | Light & flexible uncoated paper (50g–120g) |
Static Eliminator (High Voltage / Plasma) | Eliminates static electricity on paper surface and separates sheets | Static adhesion, paper flying | Woodfree paper, tissue paper, other lightweight paper, kraft paper |
Static Eliminator (High Voltage / Plasma) | Eliminates static electricity on paper surface and separates sheets | Static adhesion, paper flying | Woodfree paper, tissue paper, other lightweight paper, kraft paper |
Thickened Heavy-Duty Knife Shaft + Reinforced Frame (Non-standard) | Improves torsional strength and reduces cutting vibration | High cutting resistance, cutting deviation, strong vibration | High GSM cardboard, extra-thick industrial board |
High-Strength Anti-Slip Press Rollers | Increases friction, prevents curling and slipping | Web deviation, curling, slippage | Cardboard, laminated paper, thick board paper |
Full Servo Independent Drive System | Synchronized precise speed control of all rollers | Coating damage, inaccurate cutting length | Coated paper such as coated art paper and matte paper |
Automatic Web Guiding System (Single/Multiple Layer Edge Control) | Real-time correction of web deviation | Large roll diameter deviation, loose roll paper deviation | Corrugated medium paper, linerboard, large master rolls |
Multi-Roll Unwinding Stand (Hydraulic Paper Stand) | Mechanical synchronized damping to balance tension of multiple rolls | Multi-roll tension imbalance | Light & flexible paper (multi-roll production scenarios) |
2.4.Core Principle of Limitation on Unwinding Roll Quantity
The number of unwinding rolls is not set arbitrarily. It is primarily restricted by four mechanical factors, which directly determine the rationality of machine selection:
- Self-weight Load: The higher the GSM, the heavier each paper roll. Multi-roll stacking may exceed the load-bearing limit of the frame bearings and unwinding stand.
- Centrifugal Force Effect: During high-speed operation, multiple heavy rolls generate significant centrifugal force, which may cause vibration and web deviation, affecting cutting accuracy.
- Tension Synchronization: The higher the stiffness of the paper, the more difficult it is to maintain consistent tension in multi-roll unwinding, leading to uneven tightness and cutting deviation.
- Web Guiding Load: The more rolls used, the greater the compensation demand on the web guiding system. However, thick paper has high rigidity and cannot be finely adjusted, so single-roll operation is required.
Summary: Lower GSM and softer paper allow more unwinding rolls; higher GSM and stiffer paper allow fewer rolls. High-GSM paper must be operated in single-roll mode.
3. Detailed Matching of Paper Type + GSM with CHM Cutting Machine Models (Formal Selection Standard)
Based on industry paper classification, this section clearly defines the applicable machine models, optional models, prohibited models, number of unwinding rolls, and required configurations for each paper type and GSM range, ensuring accurate and practical machine selection.
Light & Flexible Uncoated Paper (50g–120g)
3.1. Woodfree Paper / Writing Paper / Lightweight Copy Paper Base(60g~120g)
- Applicable Machine Models: Main standard configuration — CHM-1400 standard single-knife cutting machine; wide-format large rolls optional — CHM-1700 economical single-knife model
- Prohibited Models: CHM-SGT series double-knife heavy-duty models (excessive pressure may cause paper wrinkling and cutting loss)
- Applicable Unwinding Rolls:
60g–80g: 4–5 rolls (full configuration, improves production efficiency);
80g–120g: 3–4 rolls (reduced rolls to avoid vibration instability)
Required Configurations: Thin paper tension control system + web guiding system + static eliminator (solves stretching, wrinkling, and static adhesion issues)
3.2. Tissue Paper / Copy Paper / Typing Paper(50g~70g)
- Applicable Machine Model: CHM-1400 single-knife model for thin paper
- Prohibited Models: All double-knife models
- Applicable Unwinding Rolls: 4–5 rolls (full configuration; extremely light weight, easy tension synchronization, maximizing production capacity)
- Required Configurations: Thin paper tension control system + web guiding system + static eliminator + light-pressure feed rollers (to prevent indentation marks and paper drifting)
3.3.Corrugated Medium Paper / Standard Corrugated Base Paper(60g–180g )primarily suitable for 60g–120g; 120g–180g is classified as medium GSM
- Applicable Machine Model: CHM-1700 standard single-knife model (with web guiding system)
- Prohibited Models: Double-knife models (high cutting force is unnecessary and may crush the corrugated structure)
- Applicable Unwinding Rolls: 60g–120g: up to 3 rolls, 120g–180g: maximum 2 rolls (large roll diameters are prone to web deviation; reducing the number of rolls improves stability)
- Required Configurations: Automatic web guiding system + medium tension control system + static eliminator (to solve large-roll deviation and loose-roll unwinding issues)
Medium GSM Printing / Standard Packaging Paper (120g–250g)
3.4. Coated Paper / Matte Coated Paper (105g–250g) 105g–120g follows the light paper category; 120g–250g is classified under this category
- Applicable Machine Models: 105g–157g: CHM-1400 / CHM-1700 standard single-knife models, 180g–250g heavy coated paper: CHM-1700 reinforced single-knife model
- Prohibited Models: None (selection depends on actual requirements; however, standard single-knife models are not recommended for heavy coated paper)
- Applicable Unwinding Rolls: 105g–157g: 2–3 rolls, 180g–250g: 1–2 rolls only (to avoid tension imbalance, coating scratches, and dusting)
- Required Configurations: Full servo drive system + automatic web guiding system + medium tension control system + static eliminator (for precise speed control, coating protection, and prevention of coating dusting)
3.5. Pearl Paper / Specialty Art Printing Paper (120g–300g) 120g–250g follows this category; 250g–300g is classified as high-GSM paperboard
- Applicable Machine Models: 120g–250g: CHM-1700 reinforced single-knife model, 250g–300g: Entry-level CHM-SGT1700 double-knife model
- Prohibited Models: Standard single-knife models (for paper above 250g)
- Applicable Unwinding Rolls:120g–250g: 1–2 rolls,250g–300g: Single roll only
- Required Configurations: Full servo drive system + automatic web guiding system + static eliminator + anti-slip press rollers (to protect delicate surfaces from scratches and prevent web deviation)
3.6.Standard Kraft Paper / Linerboard( 120g–250g)
- Applicable Machine Model: CHM-1700 reinforced single-knife model
- Prohibited Models: None (however, double-knife models are not recommended, as high cutting force is unnecessary and would increase costs)
- Applicable Unwinding Rolls: Maximum 2 rolls; multi-roll operation is not recommended (large roll diameters are prone to web deviation, and tension balancing becomes difficult with multiple rolls)
- Required Configurations: Automatic web guiding system + static eliminator + reinforced press rollers (to solve large-roll deviation and unstable paper feeding issues)
Extra Thick Industrial Paperboard / Specialty Composite Paper (550g–1000g)
3.7. Grey Board / Double Grey Board / Rigid Box Board(250g–600g) 250g–550g follows the high-GSM paperboard category; for paper above 350g, wide-width heavy-duty models are recommended
- Applicable Machine Models: 250g–550g: CHM-SGT1700 heavy-duty double-knife model, 350g–600g: CHM-SGT1900 heavy-duty double-knife model
- Prohibited Models: All single-knife models
- Applicable Unwinding Rolls: Single roll only
- Required Configurations: Thickened knife shaft + reinforced machine frame + vibration-damping base (to absorb cutting vibration and prevent knife shaft deformation)
3.8.Extra-Heavy Industrial Paperboard / Composite Board (600g–1000g)
- Applicable Machine Model: CHM-SGT1900 ultra-heavy-duty customized double-knife model
- Prohibited Models: All single-knife models and non-customized double-knife models
- Applicable Unwinding Rolls: Customized single-roll large-diameter unwinding stand, single roll operation only (paper diameter ≤ 2000mm)
- Required Configurations: Ultra-heavy-duty side frame + alloy steel rotary knives + independent tension control system + vibration-damping base (to withstand extremely high cutting load and ensure slitting precision)
Special Application Paper (120g–400g)
3.9. PE Laminated Paper / Moisture-Proof Composite Paper / Laminated Packaging Paper (120g–300g)
- Applicable Machine Models:120g–250g: CHM-1700 reinforced single-knife model，250g–300g: CHM-SGT1700 double-knife model
- Prohibited Models: None (selection based on GSM; however, standard press rollers should be avoided)
- Applicable Unwinding Rolls: 120g–250g: 1–2 rolls, 250g–300g: Single roll only
- Required Configurations: Anti-stick silicone press rollers + low-temperature feeding system + medium tension control system + static eliminator (to solve surface slippage and roller sticking issues)
3.10.Metallic / Holographic / Aluminum Foil Composite Paper (200g–400g)
- Applicable Machine Model: CHM-SGT1700 double-knife special model
- Prohibited Models: All single-knife models (prone to pressure marks, surface scratches, uneven cutting)
- Applicable Unwinding Rolls: Fixed 1 roll
- Required Configurations: Alloy steel rotary knife + light-pressure anti-slip rollers + medium tension control + static eliminator (ensures cut edges are free of pressure marks and scratches, with smooth cutting)
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