Chemi-Thermomechanical Pulp (CTMP)
Chemi-thermomechanical pulp (CTMP) is produced by treating wood chips with chemicals like sodium sulfite before mechanical refining under steam pressure, resulting in high-yield pulp with good strength properties. It falls under HTS 4705.00.00.00 as it combines chemical impregnation and mechanical processing to break down wood fibers. This pulp is widely used in newsprint and tissue production.
Import Duty Rates by Country of Origin
| Origin Country | MFN Rate | Ch.99 Surcharges | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | +35.0% | 35% |
| 🇲🇽Mexico | Free | +10.0% | 10% |
| 🇨🇦Canada | Free | +10.0% | 10% |
| 🇩🇪Germany | Free | +10.0% | 10% |
| 🇯🇵Japan | Free | +10.0% | 10% |
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If primarily mechanical with minimal chemical treatment
Pure mechanical wood pulp like refiner mechanical pulp (RMP) without significant chemical processing falls under heading 4701 for non-chemical pulps.
If further chemically refined to sulfate dissolving grades
If the pulp meets dissolving grade criteria (high alpha cellulose content), it shifts to chemical wood pulp under heading 4703.
If for sulfite-based semi-chemical variants
Semi-chemical sulfite pulps may classify under 4704 if the chemical process dominates over mechanical.
Not sure which classification is right?
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Import Tips & Compliance
• Verify pulp yield and processing method via mill certificates to confirm classification under 4705, avoiding misclassification as pure mechanical pulp
• Ensure documentation includes chemical treatment details (e.g
• sulfite or peroxide) and brightness levels for customs valuation
• Check for moisture content compliance (typically 10-50%) as it affects duty assessment; common pitfall is inadequate lab testing
Related Products under HTS 4705.00.00.00
Thermomechanical Pulp (TMP)
Thermomechanical pulp (TMP) involves steaming wood chips at high temperature followed by mechanical defibration, with mild chemical additives to enhance fiber separation. Classified under HTS 4705.00.00.00 due to the combined mechanical and chemical pulping processes. Ideal for graphic papers requiring high opacity.
Refiner Chemical Pulp (RCP)
Refiner chemical pulp (RCP) chemically treats wood chips before refining in pressurized refiners, a clear combination of processes. Classified under HTS 4705.00.00.00 for semi-chemical wood pulp. Used in tissue and towel products.
Softwood CTMP Pulp
CTMP made from softwood species like spruce or pine, using chemical-mechanical process for long-fiber pulp. Under HTS 4705.00.00.00 as combined pulping. Used for linerboard.
Hardwood Semi-Chemical Pulp
Semi-chemical pulp from hardwoods like aspen or eucalyptus via chemi-mechanical process. HTS 4705.00.00.00 for hybrid method. For tissue and fluff pulp.
Newsprint Grade CTMP
CTMP optimized for newsprint with specific freeness and opacity from combined pulping. HTS 4705.00.00.00 applies. Blended with deinked pulp.
Tissue Grade Semi-Chemical Pulp
Semi-chemical pulp for soft tissue, combining processes for bulk and softness. Under 4705.00.00.00.