ISO 8351-2:1994

Overview

ISO 8351-2:1994 is an international standard published by the International Organization for Standardization (ISO) that provides a method of specification for sacks made from thermoplastic flexible film. This part of ISO 8351 focuses on offering a comprehensive checklist for defining the characteristics of sacks when placing orders, ensuring clear communication between manufacturers and customers. Unlike standards that specify quantitative performance requirements, ISO 8351-2 centers on the detailed description of sack features such as dimensions, material types, and construction details.

This standard is primarily intended for sacks made from thermoplastic flexible films as defined by ISO 6590-2. It facilitates the accurate specification of sacks for packaging purposes, helping standardize ordering and manufacturing processes worldwide.

Key Topics

• Sack Types

  • Open-mouth sacks such as heat-sealed flat, heat-sealed gusseted, pasted flat hexagonal-bottom, and others
  • Valved (closed-mouth) sacks including valved heat-sealed flat, side-valved heat-sealed gusseted, etc.

• Material Specification

  • Types of thermoplastic films used (e.g., PE-LD, PE-LLD, PE-HD, PVDC, E/VAC)
  • Thickness in micrometers or grammage per square meter
  • Special surface treatments like antislip or antistatic coatings, with directionality noted (face in/out)

• Dimensions and Construction

  • Length, width, gusset width, valve dimensions, and more, measured in millimeters in accordance with ISO 6591-2
  • Tube types such as side-welded or longitudinal seam configurations (continuous, interrupted, overlap width)
  • Heat-sealed closure positions and distances from sack edges

• Valves and Closures

  • Valve types (internal sleeve, external sleeve, reinforced sleeve) and positions
  • Heat seal specifications and filling apertures standardization

• Additional Features

  • Perforation details including number, size, and location of holes
  • Printing requirements encompassing ink colors, abrasion resistance, and positioning on sack surfaces
  • Packaging and bundling instructions such as sack arrangement in bundles and pallets

• Documentation and Ordering

  • Clear specification format agreed upon by customer and manufacturer
  • Inclusion of customer and manufacturer specification numbers, delivery and invoice addresses

Applications

ISO 8351-2:1994 is essential for manufacturers, suppliers, and customers involved in the production and procurement of sacks made from thermoplastic flexible films used in various industries such as:

• Food and beverage packaging
• Agricultural product storage and transport (e.g., seeds, grains)
• Industrial materials packaging (chemicals, powders, granules)
• Consumer goods packaging requiring flexible but durable sacks

Utilizing this standard ensures that sacks meet agreed-upon specifications, improving supply chain communication and reducing discrepancies during manufacturing and delivery stages. It supports product consistency and regulatory compliance on an international scale.

Related Standards

• ISO 6590-2:1986 - Defines types and vocabulary specific to sacks made from thermoplastic flexible films, forming the basis for specification in ISO 8351-2.
• ISO 6591-2:1985 - Provides description and measurement methods for empty sacks made from thermoplastic flexible films, used for dimension standards referenced in ISO 8351-2.
• ISO 8351-1 - Covers specification methods for paper sacks, complementing part 2 for a broad range of sack materials.

Incorporating ISO 8351-2 into packaging procurement processes enhances clarity and ensures efficient specification of thermoplastic film sacks, benefiting industries dependent on reliable and standardized packaging solutions.