Hot Melt News

Paper Bag Bottom Gluing is done on most bag machines with a glue paste pot containing a roller and a wheel with a rotating glue pad/stamping system. The paste is poured into the pot, transferred onto the wheel, then transferred again to the stamp.  The stamp contacts and then stamps the bag bottom as it comes through the machine, leaving an “I” pattern of glue on the bag bottom.  This pattern is required to insure thorough bonds for all folded substrates. The bag is then closed and stacked for distribution. The water-based adhesive has some initial tack, but the bond occurs mostly as a result of the adhesive being absorbed by the paper.

This method of applying water-based adhesive is accepted as the standard for the paper bag industry, even though it produces significant amounts of defective product, limits the speed of the machinery, all  while being maintenance intensive. Because the water-based glue dries quickly on the glue pad, it is difficult to insure that the quantity of adhesive is consistantly applied to each bag bottom.  Too little glue or too much glue have the same effect — not bonding the bag bottom. In addition, the varied glue patterns can allow excess adhesive to squeeze out and bond bags to each other. Another common problem is that the paste pot has a tendency to sling adhesive, as the adhesive viscosity varies with the wheel rotation.  This slinging has the effect of “Blocking” bags together and creating the need for excessive cleaning and maintenance on the machine.

New technology is available to bond bag bottoms using non-contact hot melt application systems. As the open bag bottom travels through the bag machine, precise dots and lines of hot melt are applied to the bag bottom from fixed high-speed hot melt guns with the patterns on very close centers. The compression of the bag bottom flaps spreads the hot melt adhesive, which quickly sets to form a permanent bond. Fixed high-speed glue guns insure that there is no pattern variability. The precision nozzles simply open and close according to the signal supplied by the variable speed controller and adhesive is vented into beads or dots onto the bag bottom.

The use of this high speed hot melt system was pioneered by bag manufacturers who specialize in plastic, metalized and coated bag material, where water-based adhesives would not work.  These nonporous substrates have more memory than paper substrates, and they are easily bonded by the aggressive hot melt adhesive applied in precise patterns.

The Bag Bottom Hot Melt Gluer does not touch the bag, does not require hourly maintenance, virtually eliminates product defects,and can easily increase the speed of any bag machine.  This system is versatile and can also be used in seaming applications.

Hot Melt adhesive is a viable and preferred alternative for paper bag bottom gluing. It offers significant improvements in product quality, manufacturing processes, and maintenance requirements.

High Speed Hot Melt Retrofit Package for Bag Machinery

Hot Melt bonds all bag substrates for production of wider range of bags

visit Glue Machinery Corporation to discuss your project and how we can improve your ‘bottom’ line today.

Perfect Binding, in its most basic form, requires a hot melt wheel coater, quality hot melt adhesive and a steady hand.

Smaller books with less pages can be manually run over these low cost hot melt rollcoater systems. The compression of the book blockpages, compression against the wheel, speed of operation, and viscosity of the adhesive are all key elements that determine the success of a perfect glue bound book.

Simply stack your pages with end sheets attached so that a smooth bottom is presented to the roller and place a heavy coating of flexible long open time hot melt adhesive on the spine. For good measure a second coating is advisable. Then insert the bound product into the spine of the cover and compress. Close the book to insure the spine stays in intimate contact with the cover spine.

After a few minutes the release liner on the end sheets can be removed and  affixed to the inside of the cover.

Look for an end sheet pressure sensitive coating system that eliminates the need to install these precoated components of a book in a future Hot Melt News release.

CD/DVD/DigiPak Sleeve Gluing and Tray Attachment can be easily accomplished using a benchtop hot melt system with timer, such as Glue Machinery Corporations Shot Pot with Timer, to apply aggressive clear pressure sensitive hot melt. Typically this type of system is used in smaller assembly applications and is often used as a back up to larger automatic systems.

Simply position the CD/DVD sleeve or DigiPack under the nozzle of the benchtop hot melt system , actuate the foot pedal to  apply a thin and consistent bead of hot melt pressure sensitive to the substrate, then fold and compress. The bond will occur immediately, minimizing the amount of time needed for compression.

The attachment of the CD/DVD or DigiPak to the plastic tray can also be accomplished with the benchtop unit with timer and a custom nozzle. This system achieves this by cycling precise dots of clear pressure sensitive hot melt to the tray for attachment to sleeve or DigiPak.

Clear pressure sensitive hot melt with high temperature resistance works well for bonding paper substrates to themselves as well as the plastic tray to the sleeve or DigiPak.

http://www.youtube.com/watch?v=gRkTQWDnbgc

Label Gluer Lite by Glue Machinery Corporation

The Label Gluer - Lite is a simple cold glue roll coater that applies water based adhesive to paper and other thin materials.

Simply pour the P200 (or other) water based adhesive into the Label Gluer-Lite glue pan, turn on the constant speed roller, adjust the coat weight on the wheel, and lastly feed the paper into the gluer. The paper is lightly wrapped around the wheel, which is where adhesive is transferred. This wheel specifically applied adhesive glue to the back of the paper and not to the edges or the front.

The adhesive coat weight produced is precise and consistent. One way to ensure optimal application precision is to keep the wheel and adhesive clean. When done with the system the clean up is quite simple, only taking five to ten minutes.

This cold glue roller gluer can apply a range of water based adhesives that permanently bond fabric to paper and several other materials as well.

In the video below, our customer had the need to bond fabric to paper. We successfully demonstrated how the Label Gluer Lite is a great solution for this process.

The Label Gluer- Lite is also used in industrial assembly applications and other high capacity manufacturing needs.

Contact Pierce Covert at Glue Machinery Corporation to discuss your project and how Glue Machinery can offer you the best solutions and options available.

The Dynamelt and Dynamini hot melt systems have an easily accessible hot melt filter located in the top of the hot melter manifold.

Hot melt adhesive can cause severe burns, therefore it is critical that users are very careful when operating on or with this machine. When working with this filter please remember to wear protective gloves, clothing, and glasses to prevent burns and other related dangers. It is also important to turn off both air and power to your hot melt system before servicing the filter in the hose manifold.

We suggest that you read all manuals for the Dynamini and Dynamelt prior to servicing the unit as well.

After performing the preventative and initial steps above, remove the cover plate covering the top of the hose manifold.

With an M5 Allen wrench vent the pressurized adhesive from the hose manifold as shown in the video to be shown below.

Finally, with a 5/8 wrench remove the large bolt and extract the 40 or 100 mesh filter from the hose manifold.

Dynamini/Dynamelt Filter Removal Animation on Youtube

Call or email Glue Machinery service technicians with any questions regarding the Dynamini or Dynamelt. Please note that all parts are available and often ready for immediate delivery with one call for these units.

4234 Boston St, Baltimore, Maryland 21224
Toll Free 1-888-202-2468 | Phone: 410-761-2727 | Fax: 410-761-5127 | Email: info@gluemachinery.com

Many filters are produced in longer lengths than are needed and can can be cut in half to produce two filters or to offer a custom length filter. When cut these filters exposed ends need an “End Cap” attached to finish the product.

The End Cap is folded around the end of the filter and bonded to the filters cardboard frame and filter substrate with adhesive. Many customers apply heat reactivatable or water based adhesive that must be heated and clamped to bond. This requires special clamping equipment and when done manually this process is extremely slow.

For fast manual assembly, Glue Machinery Corporation recommends a long open time hot melt that is applied by an open wheel hot melt roll coater directly to the flat end cap. One operator can easily complete one end cap gluing process every 5-10 seconds with a properly scored end cap. With the correct hot melt adhesive and rollcoater machine to provide exact coat weights, temperature, and coating speeds- your production speed can be maximized and process streamlined.

New Video posted to our Youtube channel: