Geometry on the web
Estimates how efficiently the product shapes fit within the usable material width and repeat length.
Material Economics by Design
Cotton Pad Material Yield and Skeleton Waste Management
Evaluate how product geometry, cutting layout and operating losses affect material cost—and how organized skeleton-waste winding supports a cleaner, more manageable production process.
Web Platform310 mm total material width
Layout BasisProduct-specific shape, size and cutting gaps
Waste HandlingContinuous skeleton material collected in an organized roll
Result BasisActual yield confirmed through production data
Start with the Right Definition
Theoretical nesting is not the same as operating yield
A high-density mold layout matters, but real material cost also includes web-edge allowances, start-up waste, changeovers, breaks, rejects and nonconforming output.
Material used outside saleable pads
Includes edge trim, skeleton material, start-up, breaks, setup and other process-related losses.
Accepted pads from material issued
Uses actual production and quality data to show what portion of the consumed material becomes approved product.
Comparisons are meaningful only when the same product drawing, material structure, width, quality criteria and measurement method are used.
Cutting Layout
Product-Specific Nesting Within the Web Width
KNK engineers evaluate the number of products arranged across the 310 mm material width and the repeat pattern along the web. The objective is to reduce unnecessary gaps while retaining the spacing required for stable cutting and tool integrity.
Round, square, oval and custom shapes require different nesting logic.
Pad dimensions determine the practical number produced across the web.
Cutting gaps and edge allowances must remain compatible with the tooling and material.
The smallest geometric gap is not automatically the best production setting. Layout density must be balanced with cut quality, web stability and tool life.
Waste-Stream Control
Continuous Skeleton Material Winding
The remaining web structure is guided away from the cutting area and collected into a more manageable roll. Organized winding supports routine removal and helps prevent loose skeleton material from accumulating around the production area.
Maintains a defined path for the continuous skeleton material.
Supports more orderly collection and operator handling.
Winding conditions are adjusted for the material and remaining web strength.
Waste winding supports process organization but does not guarantee uninterrupted operation. Web breaks, material variation and setup still require monitoring and operator response.
Downstream Disposition
Evaluate Reuse or Recycling as a Separate Material Stream
Collected skeleton waste may be suitable for recycling or another recovery route depending on fiber composition, cleanliness, additives, local regulation and available recyclers. Keeping the waste organized can make sorting and handling easier.
Identify fiber composition and contamination risk before selecting a route.
Store and label collected waste according to the site’s handling procedure.
Confirm acceptance criteria and commercial value directly with the recycler.
KNK does not guarantee that skeleton waste can be sold, recycled or reprocessed. Feasibility and value depend on the customer’s material, market and local waste-management requirements.
Measurement Method
Measure accepted output against material issued
For operating decisions, use a defined production period and record all material issued, approved finished pads and documented losses. Avoid presenting theoretical mold-area utilization as the factory’s guaranteed material yield.
Saleable material yield: material represented by accepted finished pads ÷ total production material issued × 100%. Define how product weight, work-in-process and remaining roll material are handled in the calculation.
01 MATERIAL ISSUEDRoll weight or another controlled input measurement
02 ACCEPTED OUTPUTApproved pad quantity and verified product weight
03 SKELETON WASTECollected remaining web after die-cutting
04 OTHER LOSSTrim, start-up, breaks, rejects and sampling
05 TEST PERIODAgreed duration, speed range and operating conditions
06 COMPARISON BASISSame product, material and quality standard
Engineering Input
What we need for a layout review
These inputs allow the engineering team to compare practical mold arrangements and explain the assumptions behind the estimate.
Dimensioned drawing
Finished shape, size, edge geometry and permitted orientation.
Material width
Total roll width, usable width and required web-edge allowances.
Material structure
Fiber type, basis weight, thickness, layers and relevant behavior.
Quality criteria
Dimensions, edge appearance, embossing and accepted defect limits.
Production mix
Expected SKU volumes, changeover frequency and operating schedule.
Waste plan
Collection, storage and intended downstream handling method.
Verification Process
Confirm layout assumptions with real production evidence
A useful yield review progresses from drawing-based estimation to a defined material trial and recorded operating result.
Geometry review
Compare possible arrangements within the usable web width.
Tooling proposal
Define practical pitch, gaps, edge allowance and product orientation.
Material trial
Observe cutting quality, web stability and skeleton-waste handling.
Yield record
Measure accepted output and documented losses using the agreed method.
Estimated yield should state its calculation basis. Actual yield varies with material consistency, machine setup, operator practice, quality limits and production conditions.
Compare cutting layouts for your product design
Send your pad drawing, material width, layer structure and quality requirements. KNK will review the practical nesting concept and identify which assumptions require material testing.