Security Of Closure Depends Upon

Front 1

METHODS OF SEALING

LINERS AND LINERLESS CLOSURES
MUST PROVIDE:

Back 1

TIGHT SEAL
BE COMPATIBLE WITH PRODUCT
NOT BE A SOURCE OF CONTAMINATION

Front 2

LINERLESS

Back 2

LINERLESS CLOSURES USE NO LINER TO SEAL THE CONTENTS WITHIN BOTTLE, BUT A DESIGN MOLDED INTO THE CLOSURE ITSELF.

Front 3

Types of Linerless Closures

Back 3

TYPES:

LAND – sealing on the surface of the bottle finish, E – I = sealing surface

PLUG or valve-type – sealing on the I dimension of the bottle

Front 4

Land SealOne type of design: crab claw

Back 4

Named for its shape, the Crab Claw is a thin flexible seal, which compresses against the top sealing surface, or the land, of the bottle during normal capping operation, much like a gasket or a liner.
This feature prevents leakage and is considered a universal seal, since it will seal a variety of bottles.
It does require a bottle land, which is flat and free of scratches, gouges and pitting.
The Crab Claw seal requires “significant” compression; therefore it is best suited to be used with threaded closures.

Front 5

Land Seal V seal

Back 5

A small non-flexible ring in the shape of a “V” makes contact with the container finish on the sealing surface (land) area.
This type of seal is most commonly used with tubes.
The V-Seal requires compression for the seal to be effective, therefore it is best suited to be used with threaded closures.

Front 6

Plug Seal or Valve Seal I dimension

Back 6

The Plug Seal fits into the bottle neck and seals against the inside diameter of the container.
For the seal to be effective, the sealing surfaces of the closure and the container must be within specific inside dimensional tolerances and surface quality. –controlled I

Front 7

Liner SealsMost Forgiving

Back 7

The Flat Land Seal consists of a flat surface on the inside of the closure.
The flat surface of the closure makes contact with the sealing surface (land) of the container.
Flat Seals are generally used with closures that are supplied with a liner.
The bottle land must be free of nicks, scratches and gouges for the seal to be effective.
A Flat Seal requires significant compression; therefore it is best suited to be used with threaded closures.

Front 8

Liner Components (2)

Back 8

TWO COMPONENTS:

BACKING
FACINGS

Front 9

BACKING

Back 9

REQUIREMENTS:

MUST BE SOFT TO TAKE UP ANY SURFACE IRREGULARITIES

MUST BE ELASTIC TO RECOVER SOME OF THE ORIGINAL SHAPE , WHEN REMOVED AND REPLACED

Front 10

FACINGS

Back 10

REQUIREMENTS:
GIVE REQUIRED BARRIER QUALITIES

WITHSTAND ABRASION FROM SEALING SURFACE WHEN IT IS APPLIED OR REMOVED

BOTH FACINGS AND BACKINGS MUST BE COMPATIBLE WITH THE PRODUCT

Front 11

Backing Pulp/Facing Liner

Back 11

Pulp/Facing Liner is a pulp backed structure with a lamination/coating of material such as plastic, aluminum foil, or paper - which is referred to as "facing". There are a variety of facings available to meet specific packaging needs.
Soroka page 302 lists common liner constructions

Front 12

Liner Materials

Back 12

.0015" polyethylene coated white paper laminated to pulpboard.

75-gauge Saran film laminated to white paper and bonded to pulpboard.

Front 13

Foam Liner

Back 13

The Foam Liner is an extruded foam structure. This liner is either co-extruded, such as a skin layer/foam layer/skin layer "sandwich" type structure of low density polyethylene resin, or is single extruded foam of low density polyethylene resin or polystyrene resin.
The Foam Liner is also available laminated with facing material such as polyester (PET) and Saran for special applications.

Front 14

Vented Liner

Back 14

The vented liner is recommended for products that release or intake gas as a result of temperature or altitude changes and/or because of the inherent nature of the product (such as bleach).

Vented liners normally consist of a grooved and perforated foam backing with a polytetrafluroethylene (PTFE) facing.

Front 15

Types of Clousure

Back 15

CHILD RESISTANT
TAMPEREFFIDENT
INDUCTION HEAT SEAL LINERS

Front 16

CRC Child Resistant Closures

Back 16

Traditional CRC are two component systems

They require two distinct actions: push and turn

Front 17

CRC Jigger Cap with Pre Form Design

Back 17

You squeeze the closure
It extends over the lugs in the pre form
Require two distinct actions: squeeze and turn
Cost effective CRC closure, minimum use of materials

Front 18

Tamper Evident

Back 18

Designed to break away the lower part of the closure system when you open the bottle, or ring, on the transfer bead or other bottle design element

Front 19

Induction Heat Seal Liner

Back 19

Liners are placed and retained in a closure, then induction sealed onto a bottle on the filling line

Different liner materials are available, which are used depending on the bottle material, closure style, and product formula.

Induction Heat Seal, also referred as induction heat activated, is the most commonly used inner seal.

It provides an excellent moisture and gas permeation barrier, is suitable with variety of products including a range of liquid products, and it forms an excellent seal. There are a variety of different grades available –depending on application.

To form the seal, the induction heat seal requires the package (closure applied to the filled container) to pass under an induction coil to activate the sealing material.

Front 20

Induction Heat Seal Materials

Back 20

PE bottles

White lined pulpboard wax bonded to inner seal consisting of .001" aluminum foil with a polyester film and a heat seal layer.



PET bottles

White lined pulpboard wax bonded to inner seal consisting of .001" aluminum foil with a heat sealable polyester film.