Glass bottles can usually be classified in the following two types: mold-induced bottle and tubular bottle. The following table gives you the summary of the characteristics of each distinct bottle type and their applications. At Cannapco, Our glass container capabilities include both types of bottle with application to a wide range of products such as flower jars, tincture bottle and .preroll tubes.
Mold-induced glass is also known as mold blown glass or blown glass. In creating mold blown glass, a stream of molten glass is cut with a shearing blade to form a solid cylinder of glass, called a gob, where it is guided into a molding machine and into the cavities where air is forced in to produce the neck and general container shape. There are two distinct forming processes to manufacture a mold-induced container: the blow and blow method for narrow-neck containers usually, and the press and blow method used on the other hand for wide opening jars.
Raw Material:
Soda Lime Glass(70 percent silica (silicon dioxide), 15 percent soda (sodium oxide), and 9 percent lime (calcium oxide))
Manufacturing Process:
(Hot End) Furnace- IS (individual section) Machine- Annealing
Machine Type:
Speedline IS Machine, 5-20 sections, each section is single, double, triple or quad gob
Mold Characteristics:
Two sides: blank side and blow side,
Main Material: cast iron alloy, copper, bronze alloy, and stainless steel
Life expectancy: usually between 500,000 to 1,000,000 shots
Wide Mouth Straight Sided Jar
Tincture Dropper Bottle
In the blow and blow process, the first step begins with the Molten ‘gobs’ of glass delivered into a mold known as a ‘blank’ or parison mold to create a preform of the bottle, which has the exact opening part and much smaller bottle. On the second round of blowing, another blast of compressed air is then applied to the preform to transfer to the final shape of the container.
In the press-and-blow process, the parison is formed by a metal plunger, which presses the molten glass out to fill the blank mold. The parison is inverted and then blown out as in blow-and-blow which follows the two-step blow process by creating first the preform and then the final shape of the container.
Another form of glassware is tubular glass. It typically starts with a continuous drawing process, either Danner or Vello process, where glass is directly drawn into a tube from a melting tank. The forming of the glass container happens on a rotative machine where the long tube is heated, shaped and cut into the final form of the container.
Material:
Borosilicate Glass(Type I – 80% silica, around 13% boric oxide, 4% sodium oxide, and 2 to 3% aluminum oxide.)
Manufacturing Process:
Tube Drawing:
tube/rod/capillary drawn from Danner/Vello Process
Container Shape forming:
Shoulders and neck forming: creating bottle finishing and thread
tubes parting: heating and cutting to set container height
bottom glazing: heating, glazing and cooling to form the bottom
Preroll Tube
Glass Vials
The Danner process was developed for the continuous production of glass tubing and rods in which a continuous stream of glass flows over a hollow, rotating mandrel that is mounted on an incline inside a surrounding muffle. With the rotation of the needle and blowing of air through the blow-pipe, the downward glass flow gradually forms a hollow tubular envelope that is drawn into a tube.
In Vello Process, glass flows from a furnace forehearth into a bowl in which a hollow vertical mandrel is mounted or a bell surrounded by an orifice ring.Tubing is made by blowing air through a bell with a hollow tip and rod is produced by using a bell with a solid tip. The glass flows through the annular space between the bell and the ring and travels over a line of rollers to a drawing machine up to 120m away.
Whether you choose glass or plastic, understanding the architecture of bottle and the terminology used can help you choose the right bottle for your application.
The cap on your bottle has to fit correctly to prevent leakage, evaporation and potentially dangerous spills. What many don’t know is how to make sure the cap is the right size for the bottle. Also called the “mouth’ of the bottle, the opening ranges from narrow to wide mouth. Depending on your application, the opening of the bottle may be critical to how the contents are filled and dispensed.
One of the most common parts of the bottle referred to during the bottle selection process is Neck Finish. This is represented as the outer diameter of the neck of the bottle (in mm) and thread finish which is the height of the cap and the style of threads on bottle and corresponding cap.
Before you select a cap for your bottle, you need to know the correct size or Neck Finish of the bottle. These sizes are not interchangeable – a 28-400 cap will not fit properly on a bottle with a 28-410 neck finish.
Bottle Opening Anatomy Terms
Neck: The portion of the container that is above the shoulder and below the finish. The neck is where the cross-section of the bottle grows smaller to join the finish.
Finish: The top part of the container, above the neck, is shaped to accommodate a specific closure size. The term “finish” comes from a time when the finish was the last part of the bottle molding process.
Thread: A spiral-shaped ridge on the finish of a bottle intended to mesh with a similarly sized screw-type closure to seal the container.
Sealing Surface: The flat, circular top surface of the finish which makes direct contact with the closure to form a seal. It’s sometimes referred to as the “land.” If the sealing surface is not flat, the container could leak.
Neck Ring or Transfer Bead: A horizontal ridge at the base of the finish used for transferring the bottle from one part of the production process to the next.
Neck Ring Parting Line: The seam at the base of the transfer bead between the neck and finish of the bottle. It marks the joining of the finish to the bottle’s body.
The body of the bottle has important qualities that play a role in determining what the best bottle is for its intended use. The shape of the bottles body and its capacity are the most common selection factors.
Round bottles can provide for greater comfort and less hand fatigue when dispensing. Square and rectangular bottles are ideal for allowing for maximum storage on the workbench.
Capacity is typically shown as the amount of space inside a container for a given amount of product. The packaging industry uses standard sizes, usually represented in ml (also known as cc), drams and ounces. When a bottle is filled to this capacity, the contents generally fill the container to its shoulder area.
Overflow capacity is the maximum volume of a bottle if the contents were filled to the very top (or the brim). Headspace is the area above the contents of the container and below the neck opening and may be critical for some volatile compounds. Headspace may also be a consideration if the contents need to withstand any changes in pressure.
Bottle Body Anatomy Terms
Mold Seam: The slight vertical ridge that runs through the neck ring and the rest of the finish. The seam indicates where two halves of the finish molds were joined.
Shoulder: The part of the bottle that joins the wide main body and the narrower neck. The slope of the shoulder is one factor in determining how quickly a product will be dispensed when the bottle is inverted.
Body: The main part of the bottle where the sidewalls are usually (but not always) vertical.
Label Panel: Some plastic bottles can have a flat area on the body of the bottle that can accept the application of a label. Label panels are sometimes recessed to protect the labels from rubbing together during shipping and the edges from fraying.
Bottom: The entire lower part of the bottle below the sidewalls. The bottom includes the heel, base and pushup. The bottom may have letters and symbols molded into it that indicate the number of the mold cavity that produced the container and the manufacturer. The manufacturer symbol is called a “punt mark”. The bottom also may have a small projection that serves as a registration device for labeling and decorating equipment. The device also can take the form of a small recess along the heel of the container.
Mold Parting Line: The bottom plate is the part of the mold that shapes the bottom of the container. The parting line is a slight horizontal ridge formed in the joint between two parts of the mold.
Heel: The lower part of the bottle where the body (sidewall) turns from vertical to horizontal. The heel joins the sidewall to the bottom-bearing surface and may have a small recessed spot that serves as a registration device for labeling and decorating equipment.
Base: An even bearing surface that forms a ring around the outside of the bottom upon which the bottle rests. On glass containers, this ring usually is given a stippled finish in the mold to mask scratches that occur during handling. Concentrating abrasions on the stronger high points of this raised pattern prevent the container from being weakened. The base is inside and underneath the heel and surrounds the pushup.
Pushup: An inward dome in the center of the base. The resulting ring around the outside of the bottom ensures stability, providing an even bearing surface upon which the bottle rests. The pushup is exaggerated on some bottles, such as wine bottles.
Cannapaco is a US-based leading manufacturer in plastic and glass container who specializing in cannabis industry. We offer a wide range of product line that covers the whole spectrum of dispensary supplies, including versatile storage solutions and child resistant packaging that complies with state regulations for the safe sale and distribution of legal cannabis and personal care products.
Our premium quality packaging solutions sealing out moisture and air, safely storing cannabis products in the form of flowers, concentrates, pre-roll and edibles for our customers. Our factory direct price also help our customers to save money in all their packaging supplies.