Welcome to the Wisconsin Film & Bag Training Center!

 

 

 

 

Also, don't miss the page on additives in the products section.




With the help of in-line converting equipment, we are able to manufacture many types of bags and films. Selecting the best style of product really depends on the end-use application. Not sure what product would work best for your application? No problem. We're here to help with that too!

Bag Styles


      Side Gusseted                               Vented                          Bottom Seal (Tubular)

Film Styles


                Cut Sheets                 Single Wound Sheeting      Double Wound Sheeting            Layflat Tubing                    Gusseted Tubing


          Centerfold A-Wind               Centerfold B-Wind                    M-Sheeting                           J-Sheeting                     Center-Slit Sheeting


        Double Fold Sheeting                 Centerfold                        Side-Gusseted                        Bottom Seal                   Single Wound Sheets


           Centerfold Sheets                 Tubular Sleeves


back to the top




Need to fit a bag to a container? Here's how...

Inner Box Liner

1. For the bag width, add 1 to the length.
2. For the gusset, use the width.
3. For the length, add the box width to the box height. Then, add 6" for a tie off.

Example:

Width Gusset Length

74" + 1" = 75"
42" = 42"
42" + 47" + 6" = 95"


Required bag size = 75" x 42" x 95"

Pallet Cover
1. For the bag width, add 2" to the pallet length.
2. For the gusset, add 2" to the pallet width.
3. For the length, add of the pallet width to the pallet height. Then, add 5".

Example:

Width Gusset Length

74" + 2" = 76"
42" + 2"= 44"
47" + 21" + 5" = 73"


Required bag size = 76 x 44 x 73

Round Cover

1. Multiply the diameter of the container by 3.14. This is the circumference of the bag.
2. Divide by 2 to get the flat width.
3. Add 1 to the flat width for a looser fit.
4. Measure the length of the container.
5. Add of the diameter to the length of the container.
6. Add 4 to this total for overhang.

This is the total length of the bag needed.

Square or Rectangle Container

1. Add up the width of two adjacent sides.
2. Add 1 to this value for a looser fit.
3. Measure the length of the container and add of the shortest side to this value.
4. Add another 4 to this value for overhang.

This value equals the length of the bag needed.













back to the top




Flat Bag

Flat bag calculation = Width x length x gauge / 15

Example: 14 x 16, .002
14 x 16 = 224 x 2.0 = 448 / 15 = 29.8666 lbs. (true gauge weight/m)
29.8666 x 90% = 26.879 lbs. (industry standard weight/m)

Gusseted Bag

Gusseted bag calculation = Width x length x gauge / 15

Example: 14 x 5 x 16, .0015
(14 + 5) = 19 x 16 = 304 x 1.5 = 456 / 15 = 30.40 lbs. (true gauge weight/m)
30.40 x 90% = 27.36 lbs. (industry standard weight/m)

Sheeting

Sheeting calculation = Width x 12 x gauge / 15 / 2

Example: 60 single wound sheeting, .0025, 2000'/roll
60 x 12 (calculate by foot) = 720 x 2.5 = 1800 / 15 = 120 / 2 = 60 lbs. (true gauge weight/m)
60 x 90% = 54 lbs. (industry standard weight/m)
Weight per roll = 54 / 1000 = .054 x 2000 (feet per roll) = 108 lbs./roll

Center Fold (CF) Sheeting

CF Sheeting calculation = Open Width x 12 x gauge / 15 / 2

Example: 60 CF to 30 sheeting, .0025, 1000'/roll
60 x 12 (calculate by foot) = 720 x 2.5 = 1800 / 15 = 120 / 2 = 60 lbs. (true gauge weight/m)
60 x 90% = 54 lbs. (industry standard weight/m)
Weight per roll = 54 / 1000 = .054 x 1000 (feet per roll) = 54 lbs./roll

back to the top




The most common resins and films used in blown film extrusion are outlined in the table below. Not sure what resin or film will work best for your application? No problem! We can help with that too!

Type

Description

Characteristics

Typical Applications

Barefoot

LDPE or LLDPE resin that is
free from slip and antiblock

Tacky film
Good clarity
Good strength
Good puncture resistance

Bailer bags, mattress bags, non-scratch applications, industrial applications and FDA applications

Clarity

LDPE or LLDPE resin with a
high gloss or low haze factor

High gloss, clear film
Medium strength
Good puncture resistance
Higher cost

Bakery bags, high clarity applications, FDA applications and box liners

Frac

LDPE that has shrink characteristics

Stiffer material
Good strength
Good clarity
Shrink characteristics

Shrink bag/film applications and heavy duty bag/film applications

LDPE

Low density polyethylene

Good clarity
Medium strength
Punctures easily
Higher cost than LLDPE

Box liners, can liners, sheeting, general packaging, FDA and non-FDA applications

LLDPE

Linear low density polyethylene

Good clarity
Good strength
Good puncture resistance
Low cost

Box liners, can liners, trash bags, sheeting, general packaging, FDA and non-FDA applications

Medium molecular weight high
density

High density material

Cloudy appearance
Stiffer film
Punctures easily
Withstands high temperatures
Medium strength

Gerber film, high temperature applications and industrial applications

Metallocene

LLDPE with a metallocene
olefin to improve dart impact

Enhanced puncture resistance
High strength
Good clarity
Ability to down gauge
Withstands cold temperatures
High seal ability

Heavy duty bags/film, puncture resistance, freezer applications, FDA and non-FDA applications

Repro

Post industrial waste material
reprocessed into resin pellets

Low cost
Low clarity
Medium to high strength
Medium to high puncture resistance
More environmentally friendly

Non-FDA applications, can liners and industrial type applications

back to the top