ASTM D3810-97(2007)

This test method may be used to:

Compare the functioning of two or more kinds of Type IA closures.

Determine or aid in the recommendations for minimum immediate removal torque or minimum application torque for the proper securing of Type IA child-resistant closures after evaluation of the torque degradation characteristics of the closure-container system.

Compare immediate removal torque to fully degraded, with long-term storage, removal torque for a given closure-container system.

Provide for the evaluation of one aspect of child-resistant closure continuous functioning by projected reverse-ratchet abuse.

Compare application torque retentions of given Type IA closures following a change in lining material, closure material, container type, or any other change from the closure-container system initially evaluated.

Assure by determining reverse-ratchet torques and removal torques, that the given Type IA child-resistant closure is continuing to function as it did during child and adult protocol (16 CFR 1700.20).

1.1 This test method covers the determination of or the recommendation for minimum application torque that results in a fully degraded removal torque that is at a level greater than the maximum expected reverse-ratchet torque for a Type IA child-resistant closure. (See Classification D 3475).

1.2 This test method provides a procedure that will assure the maintenance of the respective child-resistant properties of Type IA child-resistant closures.

1.3 A major limitation to the determination of minimum application torque of Type IA child-resistant closures is because many cappers lack the capability for measuring closure application torques; therefore, minimal recommendations derived from this method are, of necessity, defined in terms of the immediate removal torques.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.