This standard outlines the specifications and testing protocols for wood wool utilized in packaging applications across India. It defines material properties, sampling techniques, and test methods including moisture content, compressibility, shock absorption, and permissible dimensions to guarantee effective protective cushioning. It is intended for manufacturers, quality assurance personnel, and packaging engineers.
Overview
This standard outlines the specifications and testing protocols for wood wool utilized in packaging applications across India. It defines material properties, sampling techniques, and test methods including moisture content, compressibility, shock absorption, and permissible dimensions to guarantee effective protective cushioning. It is intended for manufacturers, quality assurance personnel, and packaging engineers.
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Frequently Asked
Wood wool production under the standard mandates the use of only coniferous timber types. The sanctioned species include Chir (Pinus roxburghii), Cypress (Cupressus torulosa), Deodar (Cedrus deodara), Fir (Abies spp.), Kail (Pinus wallichiana), and Spruce (Picea smithiana). The timber must be sound, properly dried, and preferably free from knots and irregular grain patterns to ensure quality suitable for packaging applications.
The wood wool strands must have widths ranging between 1.5 mm and 3 mm, with a thickness not exceeding 0.33 mm. At least 75% of the strands should be 250 mm or longer, and no more than 10% of strands may be shorter than 125 mm, including dust and small pieces under 25 mm. Additionally, the amount of dust and fine particles less than 25 mm should not exceed 5% by weight per bale to maintain uniformity and quality.
Moisture content is measured by weighing a sample before and after oven drying, using the formula: Moisture % = ((Wet weight - Dry weight) / Dry weight) × 100. The acceptable moisture range at the time of inspection is between 5% and 15%. This ensures the material’s durability and suitability for packaging purposes, accounting for atmospheric moisture influence during inspection.
Compressibility is assessed by applying a controlled load on a conditioned 150 g wood wool sample within a specified frame, measuring deformation up to 50 mm compression, with limits set for load and residual compression. Shock absorption is evaluated through a drop test where a frame guide block is dropped from 750 mm, and the rebound height must not exceed 10% (75 mm) of the drop height across 10 consecutive drops, confirming cushioning effectiveness.
Wood wool bales should be packed with a net weight of either 25 kg or 50 kg, excluding any packing accessories. Each bale must bear legible, permanent markings including the manufacturer’s name, initials, or trademark, year of manufacture, net weight in kilograms, and the inscription 'WOOD WOOL'. Optionally, the ISI Certification Mark may be added to indicate compliance with Indian Standards quality assurance.
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