Dongguan Xiang Lin Plastic Products Co., Ltd.

DONGGUAN XIANGLIN PLASTIC PRODUCTS CO., LTD.

A 10-years experienced and dedicated custom plastic bottle manufacturer

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86 159 2024 6585
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TEL: 86 769 87638818

Contacts:Ms. Kathy He
address:4-5 Building, Meide Industrial Park, Li villages, Xiegang Town, Dongguan City,Guangdong Province, China

Difinitions of bottling and packaing terminology

source:   time:2017-10-24   Click :634

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We understand that packaging jargon can get confusing! To make sure you get the most out of your time on our website, we've come up with a list of bottling and packaging terminology that you might encounter. We go in-depth about everything you need to know about product packaging - from design manufacturing terms like screen printing (is a printing technique whereby a mesh is used to transfer ink onto a substrate, except in areas made impermeable to the ink by a blocking stencil) to shipping and handling terms like FTL (full truck load).

BLOW MOLDING

The process by which a “Parison” (a warm hollow tube) is placed in a mold and forced to assume the shape of a given mold “cavity” through air pressure. Once the parison has reached the limits of the cavity, the mold is opened and the finished product is ejected. For our purposes, there are three main types of blow molding processes- “Extrusion Blow Molding”, “Injection Blow Molding” and “Stretch Blow Molding”.

BOSTON ROUND

A style of bottle characterized by a round cylindrical body and a short, curved shoulder. Typically used by the drug, chemical and essential oil industries, Boston Round bottles are traditionally made of Amber Glass, but are also made of various plastic resins and colors.

CAPACITY

Related closely to “Volume”, for the purposes of our website, capacity refers to the amount of water a given container will hold. For example, our 270ml Hex Jar has a capacity of 270 milliliters (ml), or 9.1 fluid ounces (oz). Depending on your particular product and how it compares to water, the “Net Weight” of your finished good might be heavier or lighter than containers fluid capacity. Please also note the difference between capacity and “Overflow Capacity”

CAVITY

The hollow part of a “Mold” which determines the shape of a particular container.

CC

Cubic centimeter. A unit for measuring volume, where 1 cc = 0.0338 ounce.
CHEMICAL RESISTANCE

The ability of a container to maintain form and function when exposed to chemicals. Chemical resistance is determined based on a containers ability to resist the following properties- Discoloration, swelling, softening, material degradation and structural integrity.”

CHILD RESISTANT CLOSURE

Abbreviated CR—A closure that requires two distinct, dissimilar motions which make removal by a child difficult. Two common examples are “Push Down & Turn Closures (PDT)” and “Squeeze Lock Closures”

CONTINUOUS THREAD FINISH

Abbreviated CT—an uninterrupted thread found on the neck of both plastic and glass containers.

Continuous thread (CT) is a type of “finish” found on many glass and plastic containers where the “threads” wrap continuously around the “neck” of a given container. Continuous thread finishes can be found on both glass and plastic containers. Containers with a continuous thread finish require corresponding continuous thread caps which are easily applied by hand and provide a great seal between the rim of a given container and its corresponding cap. Continuous thread containers (& caps) are often shown as two numbers, separated by a back slash. The first number refers to the diameter of the opening of a jar from rim to rim, measured in millimeters. The second number refers to the depth of a closure. For the purposes of our website, the most shallow continuous closure is 400 (expressed as x/400) while the “deepest” closure is denoted as 485.

DESICCANT

A drying agent which helps controls humidity levels in sealed packages

DISC TOP CAP

Injected molded dispensing closure which reveals an “orifice” when pressure is applied to a designated area on the top of the cap. Commonly found on sunscreen and other cosmetic containers.

DOME

A style of closure where the top surface is rounded. Dome caps create a sleek appearance and are often used in conjunction with Round Bottom Jars.

FINISH

The specifically shaped container opening which will eventually accept a specific closure. Two common types of finishes include “Continuous Thread (CT)” and “Twist-Off (T/O), or Lug Finish”.
FOIL LINER

Found in metal caps, foil liners are laminated with polyester film and bonded to a pulp board backing. Foil liners are resistant to hydrocarbon based products, such as paraffin wax and oil based products. Foil liners are not recommended for use with highly acidic or alkali products.

FTL

Abbreviation for full truckload.

HDPE

Abbreviation for high density polyethylene. A naturally translucent and moderately rigid thermoplastic resin, HDPE provides an excellent moisture barrier, has excellent impact and cold resistance. HDPE has maximum recommended fill temperature of 160°F and provides a poor oxygen barrier. For more information, please visit our resin information page.
IMPACT RESISTANCE

The ability of a given container to maintain form and function when dropped or subjected to other physical force or impact.

INDUCTION MACHINE

A machine, which emits an oscillating, electromagnetic field to seal a foil lined cap to a particular container.

INDUCTION SEALING

A process, which bonds a specialized foil liner over the opening of a plastic container through the use of induction current (produced with an “Induction Machine”), which heats the foil liner & polymer coating creating a bond between the liner and rim of given container. The liner will remain in place until the consumer physically removes the liner before use. Induction sealing has been recognized by the FDA as an effective method of tamper evidency.

INDUCTION SEAL LINER

A specialized liner, comprised of several layers including wax, foil and a polymer coating which bonds to the lip of a given container through the use of an “Induction Machine”. The type of liner required is determined by the material of the container in question. 

INJECTION BLOW MOLDING

A two-stage process of plastic bottle manufacturing where a “preform" is “injection molded”. The “finish” of the given container is formed at this time. The preform is then transferred to a blow mold where the “Axial Rod” stretches the preform vertically while air pressure forces the preform to take the shape of a given cavity.

INJECTION MOLD

A mold into which a plastic resin is introduced by pressure from an exterior heated cylinder.

INJECTION MOLDING

A molding process whereby a heat softened plastic resin is forced from a heating cylinder into a relatively cool cavity which gives the product a desired shape.
LDPE

Abbreviation for low density polyethylene. LDPE is very similar to “HDPE” in composition, but differs in the branching structure of the polymerized ethylene. LDPE, when compared to HDPE, has polymer chains consisting of many branches, producing a less compact molecular structure. Due to its decreased density, LDPE bottles are great for products which require a squeeze application. For more information, please visit our resin information page.

LTL

Less than truck load. Any shipment not meeting the required weight, or number of pallets to be considered a “Full Truckload (FTL)”.

MOLD

The tool used to form the shape of the desired product in a repetitive manner.

MULTI-CAVITY MOLD

A mold with more than one cavity impressions. Although additional startup expenses are required, a multi-cavity mold is more productive in that it produces two or more bottles per molding cycle.

NECK

Found just above the shoulders of a container, the neck is the uppermost section where the “finish” is found.

PET

Abbreviation for Polyethylene terephthalate. In its natural state, PET is a colorless, transparent thermoplastic resin. Based on processing, PET can be semi-rigid to rigid, very lightweight and impact resistant. PET also provides a fair oxygen barrier and moisture
barrier. For more information, please visit our resin information page.

POLYETHYLENE

Abbreviated as PE, polyethylene is a “Thermoplastic Resin” and categorized by its density. From a packaging standpoint, “high density polyethylene (HDPE)” and “low density polyethylene (LDPE)” are the two most common forms.

POLYMER

A substance whose molecular structure is comprised of a large number of similar units which are bonded together.

POLYPROPYLENE

A translucent, semi rigid, thermoplastic polymer that provides a good moisture barrier, and is highly resistant to acid and alcohols. One of the main advantages of polypropylene is its ability to withstand temperatures up to 212°F. On the flip side, polypropylene can become brittle and susceptible to cracking under cold temperatures. For more information, please visit our resin information page.

POLYSTYRENE

Abbreviated PS, Polystyrene is a clear plastic which is very rigid, but exhibits poor impact strength. Some disadvantages of polystyrene are its inability to withstand high temperatures, cold temperatures and highly acidic products.  For more information, please visit our resin information page.

POLYVINYL (PV) LINER

Found in metal closures, PV liners feature a polyvinyl film with pulp board backing. Polyvinyl liners are resistant to mild acids, alkalis and solvents. Not recommended for active hydrocarbon or bleach based products.

PREFORM

Similar to a “Parison”, a preform is an injection-molded tube-like piece of plastic which has the “Finish” or threads of a particular container already in place.  The preform is then heated and through “Stretch Blow Molding” transformed into a finished product.

RIBBED CLOSURE

Series of vertical grooves around the outside edge which help the end user establish a grip to remove a given closure. Ribbing can be found on many styles of plastic caps such as lotion pumps, snap-top caps, as well as standard, non-dispensing plastic closures.

SMOOTH CLOSURE

The opposite of a “Ribbed Closure”, smooth closures are often preferred for their visual appeal. Smooth closures can be found in many styles, including lotion pumps, snap top caps, flip top caps and standard, non-dispensing plastic caps.


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