ASTM D4635-25 PDF

Full title and description

ASTM D4635-25 — Standard Specification for Plastic Films Made from Low-Density Polyethylene and Linear Low-Density Polyethylene for General Use and Packaging Applications. This specification defines material types, classifications, and required property tests for unpigmented LDPE and LLDPE films intended for general-purpose and packaging uses, and establishes acceptance criteria and test methods for typical film attributes.

Abstract

This standard specifies requirements for unpigmented, unsupported films made from low-density polyethylene (LDPE) and linear low-density polyethylene (LLDPE). It covers classification by type, surface, class, and finish, and requires testing for conditioning, thickness, yield, flatness, density, coefficient of friction, optical properties (clarity, haze), wetting tension, impact resistance, tensile properties, heat-sealability, and odor to demonstrate conformance with the specification.

General information

• Status: Published / active specification (designated D4635-25).
• Publication date: January 1, 2025.
• Publisher: ASTM International.
• ICS / categories: Films and sheets (ICS code commonly referenced for plastic films and sheets: 83.140.10).
• Edition / version: D4635-25 (2025 edition).
• Number of pages: 5 (concise specification document).

Scope

The scope of ASTM D4635-25 covers unpigmented, unsupported LDPE and LLDPE films produced for general-use and packaging applications. The specification applies to films made from polyethylene homopolymers, copolymers, and blends of homopolymers and copolymers (including ethylene/vinyl acetate copolymers) and provides classifications (Types, Surfaces, Classes, Finishes) and required tests to verify film performance for appearance, mechanical strength, dimensional properties, surface slip, optical properties, wetting/printing readiness, heat-seal performance, and odor.

Key topics and requirements

• Material scope: LDPE and LLDPE homopolymers, copolymers, and approved blends.
• Classification system: Types, Surfaces, Classes, and Finishes to describe film constructions and intended uses.
• Physical and dimensional tests: conditioning, thickness, yield, and flatness requirements.
• Mechanical properties: tensile (strength and elongation), impact resistance, and related acceptance criteria.
• Surface and handling properties: coefficient of friction and heat-sealability specifications.
• Optical and surface quality: clarity, haze, and odor checks for packaging suitability.
• Referenced test methods: standard ASTM test procedures for measuring the listed properties (as applicable).

Typical use and users

Manufacturers and converters of plastic film products, flexible packaging designers, quality/control laboratories, procurement and specification engineers, and regulatory or compliance teams use this standard to specify, test, and accept LDPE and LLDPE films for bags, liners, wraps, and other general-purpose packaging applications.

Related standards

ASTM D4635-25 is used alongside other ASTM test methods and specifications for plastic films and packaging materials, such as test methods for tensile properties, coefficient of friction, haze/transmittance, impact resistance, and heat-sealability. Practitioners commonly reference related ASTM test standards when verifying film properties for conformance with D4635-25.

Keywords

LDPE, LLDPE, polyethylene film, plastic film, packaging film, heat-seal, tensile, clarity, haze, coefficient of friction, film classification, D4635-25.

FAQ

Q: What is this standard?

A: ASTM D4635-25 is a 2025 ASTM International standard specification that defines requirements and test methods for unpigmented low-density polyethylene and linear low-density polyethylene films intended for general use and packaging applications.

Q: What does it cover?

A: It covers material types (LDPE/LLDPE), classification by type/surface/class/finish, and specifies required property checks and test methods for thickness, yield, density, friction, optical properties, tensile and impact resistance, heat-sealability, and odor to establish product acceptability.

Q: Who typically uses it?

A: Film producers, packaging converters, product designers, testing laboratories, procurement/specification authors, and compliance staff use the standard to specify and verify films used in packaging and general-purpose film applications.

Q: Is it current or superseded?

A: D4635-25 is the 2025-designated edition and is listed as the current published version (publication date January 1, 2025). Note that database indexing can lag; some catalogues or legacy listings may still show older metadata for D4635—consult the ASTM catalog or official Book of Standards listings for authoritative status confirmation.

Q: Is it part of a series?

A: It is one of several ASTM specifications and test methods addressing plastic films and sheet materials; users often apply it in conjunction with ASTM test methods for film tensile properties, optical properties, coefficient of friction, and impact resistance to form a complete performance and acceptance protocol.

Q: What are the key keywords?

A: LDPE, LLDPE, polyethylene film, packaging film, heat-sealability, tensile strength, clarity, haze, coefficient of friction, film classification.