Overview
EN ISO 8351-1:1996, titled Packaging - Method of Specification for Sacks - Part 1: Paper Sacks, is an international standard published by CEN that provides a comprehensive checklist for specifying the characteristics of paper sacks when placing orders. This standard focuses on ensuring clear communication between customers and manufacturers by defining detailed ordering specifications related to the description of paper sacks. Importantly, it does not cover quantitative performance requirements but serves primarily as a guideline to specify the sack’s construction, materials, and design features.
This standard is designed for application to types of paper sacks as outlined in ISO 6590-1, supporting consistent quality and compatibility in the packaging industry.
Key Topics
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Sack Types
EN ISO 8351-1 identifies various paper sack types, including:
- Open-mouth (sewn flat, sewn gusseted, pasted hexagonal-bottom)
- Valved (closed-mouth with sewn or pasted types)
- Tube types (flush-cut, stepped-end, notched-end)
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Dimensions Specification
Sack dimensions like length, width, gusset width, bottom width, valve size, and sewing line positions must be clearly stated per ISO 6591-1 measurement methods.
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Material Description
Each ply (layer) of the paper sack should be specified by:
- Type and grammage (g/m²) or thickness (μm)
- Surface treatments (e.g., coatings, antislip finishes)
- Thermoplastic films details (type, thickness, tube or flat form, melt flow index, etc.)
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Construction Details
The standard covers:
- Perforations (e.g., beneath valves, ply holes)
- Valve/sleeve types and positions
- Longitudinal seams (continuous, interrupted, overlap width)
- Pasted closure designs (bottom patch, cap, turn-over bottom)
- Sewing closures (types, stitches, thread materials, filter cords, sewing positions)
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Additional Elements
- Bottom orientation and knife-cut patterns
- Tape use and positions on sewn sacks
- Adhesives types for seams, patches, and pasting
- Printing requirements including ink types, colors, and print positions
- Packaging methods for delivery (bundles, bales, pallets)
- Documentation details (specification numbers, delivery and invoice addresses)
Applications
EN ISO 8351-1 is essential for manufacturers, suppliers, and buyers involved in the design, production, and procurement of paper sacks for packaging various commodities. Its practical applications include:
- Ordering clarity: Facilitates precise communication of sack design and materials, reducing errors in production and delivery
- Quality consistency: Provides a standardized approach to specify sack features ensuring consistent product quality
- Customization: Helps customers define special requirements such as valve types, printing, sealing, and packaging based on application needs
- Supply chain efficiency: Streamlines manufacturing and packaging processes by setting clear specification guidelines
- Compliance: Supports compliance with international packaging standards, promoting interoperability and acceptance in global markets
Related Standards
- ISO 6590-1:1983 - Packaging - Sacks - Vocabulary and Types - Part 1: Paper sacks
- ISO 6591-4:1984 - Packaging - Sacks - Description and Method of Measurement - Part 1: Empty paper sacks
These standards complement EN ISO 8351-1 by defining sack types, terminology, and measurement techniques essential for detailed specification.
Keywords: EN ISO 8351-1, paper sacks specification, packaging standards, paper sack types, sack dimensions, sack materials, packaging specifications, paper sack ordering, sack construction, valve sacks, packaging industry standards, CEN packaging standards.