Tag Archives: Heat Sealer

Sealer Sales referenced in ThomasNet Buying Guide

We are experts in heat sealers – no other company comes close to our depth of knowledge and ThomasNet agrees with us.  We’ve been in the sealer industry for over thirty years so we know a thing or two.

ThomasNet – the leading B2B database for sourcing suppliers publishes buying guides in many different industries including one on sealing equipment.  [Visit ThomasNet.com to download the free white paper.]

Thomas.Net Sealer Buying Guide

Sealer Sales on ThomasNet

Sealer Sales is listed as a resource in the ThomasNet Sealing Equipment Buying Guide and we couldn’t agree more.  Our Resources page is full of relevant information on what type of heat sealer works best for your application.

If you can’t find what you are looking for, one of our knowledgeable customer service reps is available to help answer your questions.  Send us a quick e-mail at contact@sealersales.com.

Sealer Sales Resources

 

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Best Practice: What the Heck Does Congeal Mean?

CONGEAL MEANS TO COOL UNDER PRESSURE.

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Hand / Foot Impulse Sealers
The hand or foot sealer is a manual sealer. What this means is that the congeal step or dwell step needs to be added into your sealing process to make a proper seal.    Hold the jaw down for a couple of seconds after the timer light has gone off to set the seal.  This will ensure a proper seal and will also allow the sealer to cool down before the next seal.  This will ensure longevity of the heating elements.

Auto Impulse Sealers
We recommend the congeal (cooling) setting to be at least 2x greater than the heat setting.  This will ensure that the seal has ample opportunity to set and cool under pressure.  This will also allow the heating element to cool as well.  The most important step for the longevity of auto sealers is having the appropriate congealing time.  Most customers skip the congeal setting in order to get a higher ppm (packages per minute) but this will only lead to problems – broken element and PC Board.

PRODUCT OF THE MONTH: Hand Sealers for the Medical Market

Take a look at some of the units that are available for the medical market.

KF-210HC – 10mm Hand Sealer w/ Sliding Cutter

Make your own poly bags with our hand sealer with sliding cutter (Model: KF-210HC).  The sealer can also be used for non medical packaging as well.  The unit is an 8″ hand sealer with a 10mm wide serrated seal line.  Sealer is portable.  Matching optional film roller is also available.

KF-210HC_rev

 

 

KF-210HC Seal Example_Small

 

D-3010HCA – 13″ Table Top Medical Sealer

Excellent unit for sealing sterile bag & tubing.  The 10mm wide seal width provides excellent protection.  Sealing and cooling times can be preset with a digital control panel.  Unit is also equipped with a counting timer to keep track of packages sealed.

D-3010HCA_2D-3010HCA_5

 

D-3010HCA_4

 

Maintenance – How to change the Heating Element and PTFE Cover/Adhesive on your Hand Sealer

Maintenance is KEY to a long lasting impulse sealer.  Regular maintenance of your impulse sealer will ensure the longevity of your sealer.  After using between 1,000-5,000 seals, it is normal for the heating element (wire) to break .  The number is dependent on your timer setting and will vary from user to user.  Regularly replacing your sealer’s heating wire, PTFE adhesive (sticky brown protective skin under the element), and the PTFE cover (brown protective skin over the element) is essential for your sealer’s health and well-being.

Take a look at our instructional video on how to change out your heating element and insulation pieces.

Adding a “Cut” Option to Your Sealer

We have two types of sealers that offer a “cut” option:  a cut and seal sealer (aka a sealer with a round wire) OR a sealer with a sliding cutter.  Please take a look at the two options to determine which sealer works best for you.  If you  have questions, please contact us or one of our distributors!

Seal and Cut Sealer
A seal and cut sealer is most often used in shrink wrapping  film and bags.  When using a seal and cut sealer, any excess material above the seal is cut off creating a clean seamless seal.

Seal and Cut Sealer (Round Wire)

When purchasing a seal and cut sealer, ask for an impulse sealer with a ROUND wire instead of a flat wire.  Flat wire sealers create seal widths such as 2mm, 5mm, or 10mm seal widths.  Round wires create no seam.

If you already have a 2mm sealer, you can easily purchase a round wire heating element and convert your sealer to a cut and seal sealer.  Please note:  ONLY 2mm sealers can be converted, a 5mm or 10mm sealer CANNOT be converted to a round wire.  See our instructions on how to change your heating element wire.

Sealer with Sliding Cutter
Now, a sealer with a sliding cutter is most often used to trim a bag length or seal poly tubing.  A sealer with a sliding cutter is equipped with a blade which will cut any excess material about 1/4″ from the seal line.

We carry sealers with cutters in a 2mm and 5mm seal width.  We recommend using a 2mm for sealing materials 3-5mil thick (6-10mil total) and 5mm seal width for sealing materials 6-10mil thick (12-20mil total).

Sealer w/ Cutter

Glossary of Packaging Terms

We have created a couple of glossary reference guides for our distributors.  There are so many terms to remember that we sometimes we forget too!

Click here for our A to Zs of Packaging

Click here for our Glossary of Flexible Packaging Materials

How to Seal a Gusseted Bag?

Many of our customers call us asking what sealer works best for their gusseted bag.  Our blog, today, will address that question.

What is a gusseted bag?
Gusseted bags are commonly used in the coffee and tea industry.  The sides of the bags fold in to form a gusset.  Gusset bags have sides that expand, allowing you to package bulkier, larger items.

What type of sealer should you use to seal a foil gusseted bag?  Because of the gussets, a single element sealer such as your typical hand impulse sealer  cannot properly seal through all four layers of the gusseted bag.  Do not use a hand or foot or automatic sealer, not even a 5mm sealer.

We recommend using the following sealers:

6" Semi-Automatic Double Impulse Sealer

…this small unit is the perfect size for sealing coffee bags

Double Impulse Sealers
Double impulse sealers utilize two heating wires (upper and lower) to seal through your gusset bag.  We carry both hand and foot operated as well as a few automatic units to suit your produtction level needs.   Seal width – usually 5mm or 10mm (.20″  or .40″)

For more options, please see our website here.

Our most popular unit for sealing coffee bags

Direct Heat Sealers
Direct heat sealers (also known as constant heat sealers).  Whereas impulse sealers only create heat when sealer jaw and body meat, direct heat sealers maintain heat in the jaws as long as the sealer is turned on.    As a result, direct heat sealers possess better heat penetration to seal thicker materials.  Seal width – usually 15mm (0.6″)

Portable direct heat sealers  or clamp style sealers are affordable and easy to use.   We carry 6″, 8″, and 12″ models.

  • A temperature controller accurately controls the temperature from 30°-550° F (0°-300° C)

Foot or Table Top Direct Heat Sealers utilize a temperature controller.  Both units use a foot switch to control the movement of the upper jaw.

  • Band Sealers allow you to seal nearly any thermoplastic material considerably faster than any other sealer.

Seal quickly and efficiently with a band sealer

Vacuum Sealer
Sometimes, in addition to sealing a bag, you will require a vacuum.   We also carry a vacuum sealer made specifically for foil gusset bags (coffee bags).  The vacuum sealer is a double impulse sealer with a 5mm seal.

Seals and vacuums in one step!

We hope this provides you with some smart choices for sealing your gusseted bags.  Please be sure to check out our website – Sealer Sales.  Please contact us for more questions.

How to Choose a Heat Sealer

When selecting a sealer, it is important to have a sense of the material which will be sealed.  Try and have the material thickness and width available as this will make your selection process much easier.  This will ensure the sealer you purchase is capable of sealing your material.  If you want any sealer suggestions, fill out this easy questionnaire and we will provide you with some suggestions

This page discusses the four key characteristics of sealers to help you determine which best fits your application.
What is a heat sealer?
A heat sealer (ex: bag sealer, heat impulse sealer, direct heat sealer, hand sealers) is a machine used to seal plastic material using heat. There are many types of sealers and choosing the right sealer may be overwhelming without a few basic points.
Function

There are two main types of sealers: (1) impulse heat and (2) direct heat.

Impulse sealers require no warm up time and seal by applying a pulse of energy to the sealing area, followed immediately by cooling.  Impulse sealers only use power when the jaw is lowered.  We recommend an impulse sealer for any thermoplastic material such as polyethylene (PE) or polypropylene (PP) which requires a lower seal temperature.  Materials for impulse sealers:  Polyethylene, Polyurethane, Polyvinylchloride, Pilofilm, Polyvinyl Alcohol, Saran, Nylon, bubble packs, padded mailers, foil, coated bags, Kel-F, Polyflex, Mylar, Tyvek, and other thermoplastic material.  Impulse sealers are easy to use (no warm-up time), economical (electricity used only during sealing process), and safe (no component is always hot).

There are different types of impulse sealers based on type of material and usage:

  • Hand sealers can seal poly material up to 10mil thickness
  • Pedestal Type / Foot sealers can seal poly material up to 15mil in thickness
  • Auto sealers can seal poly material up to 15mil in thickness
  • Double impulse sealers (automatic and foot options) can seal poly material up to 20mil in thickness (We recommend double impulse for heavy duty applications)
  • Sealers w/cutters seal and trim excess material (tubing) in order to make customized bags

Direct heat (constant heat) sealers maintain constant heat in both jaws.  Direct heat sealers use power as long as the machine is turned on.  As a result, direct heat sealers possess better heat penetration in roder to seal thicker materials.  We recommend a direct heat sealer for materials such as coated aluminum foil, poly cello films, gusset bags, coated Kraft papers, waxed paper, cellophane, mylar, coated PP, and other thicker materials.

We also include other types of sealers used for more specific types of applications:

Vacuum sealers remove air from the product before sealing into an impermeable package.  We recommend vacuum sealing in order to prevent oxidation, spoilage or corrosion.  Barrier bags are used because PP and PE bags are both porous and cannot be used for long term storage.

Clam shell sealers are ideal for welding clam shell packaging.

Size

The size of the sealer depends on the width of the material to be sealed.  We usually recommend adding one inch to the width of material to be sealed for easier handling.  Cutters on the sealer usually trim at slightly less than width of the sealer arm.

Speed
  • Portable sealers are lightweight, handy and versatile.  Sizes, however, are limited.
  • Hand sealers are the most simple and economical unit.  The sealing bar is lowered manually.  Sizes are available from 4” to 40” and approximately 6-20 packages can be sealed per minute.
  • Foot sealers provide a faster seal than hand sealers.  The sealing bar is pedestal controlled leaving your hands free.  Sizes are available from 12” to 35” and approximately 8-20 packages can be sealed per minute.
  • Automatic sealers provide even faster sealing than foot sealers and are ideal for high production jobs.  Automatic sealers are usually tabletop sealers whose jaws are activated automatically by a dial-controlled sequence timer.  Automatic sealers feature a pre-set time cycle to allow for a fully continuous automatic operation.  Automatic sealers can also be used with a foot pedal for semi-automatic operation.  Sizes are available from 12” to 47” and approximately 20-50 packages can be sealed per minute.
  • Continuous band sealers provide the fastest sealing operation with an unlimited length.  Bags are simply fed into sealer while resting on a conveyor belt.  Several models are available with features such as horizontal seal head, vertical seal head, tilting seal head, left or right feed, gas purging, and/or coding and imprinting.
Width of Seal / Packaging Material

Heating elements are made of nichrome (nickel-chromium) and determine the width of the seal.  There are two types of heating elements: round or flat which are interchangeable in most sealers. The round wire is mainly used to cut and seal with no excess material above the seal.  Depending on the width of the flat wire element, sealers are available in 2-3mm, 5mm, 8mm, or 10 mm. Some sealers are equipped with two heating elements for faster heat penetration making them ideal for sealing thicker materials.

 

Standard Features of our Impulse Sealers

The all-metal construction of our sealers provides industrial quality strength and ensures lasting durability.  The body is formed out of rugged cast aluminum while the pivot is an all-steel construction.  Most sealers are equipped with a plug-in electronic timer and built-in microswitch.  No warm-up time is needed.  The variable timer let you seal various types and thickness of plastic films.  A signal light and “beep” indicates the heat cycle is complete and the seal is done.

The number in the model number usually indicates the size of the sealer in mm; so 200 points to an 8″ sealer while 1000 points to a 40″ sealer. The letter in the model number is used to designate the manufacturer and type of sealer.  For example, “H” signifies a hand sealer while an “A” suggests auto sealer.