White Flat Bags
A small mark leaves the rest of the front clear.
STARCH-BASED FILM
Custom Cornstarch Bags
We turn starch-based film into flat bags, drawstring bags and tear-off rolls. Tell us what goes inside and how you want to close or dispense each bag.
Flat bags and rollsFrom 1,000 pcsExisting samples free
The green print on the flat bag is sample artwork. Ask for the film specification if you need to know what a particular bag contains.
Formats, Film and Minimum Order
- Custom orders start at 1,000 pcs.
- We can supply flat bags for hand packing, drawstring bags or connected bags on a roll.
- Choose the film color and send the logo or artwork you want printed.
- Film options include PBAT/starch compounds and, for suitable applications, PLA/PBAT/starch blends. We quote the blend and thickness together.
- We do not currently have finished-bag compostability certificates or test reports.
How We Make Starch-Blend Bags
Two bags sold as “cornstarch” can use different compounds. We identify the blend on your quote before making the sample.
Select the Compound
What will you pack? A reference bag or a description of the contents helps us choose which compound to sample.
Film Made In-House
We buy prepared compounds and blow the film in our factory. We check the width and thickness before the film goes to print.
Your Artwork on the Film
Send your artwork and bag dimensions. We leave space between the print, the seams and the opening.
Cut, Seal and Finish
Flat bags need an open edge. Drawstring bags need a closure channel. For tear-off rolls, we add perforations and wind the bags together.
Try the Bag with Its Contents
An existing sample shows the film and seams. A custom sample lets you pack your own product and try the opening or drawstring at the size you ordered.
Count the Bags before Dispatch
For loose bags, we check pieces per pack. For rolls, we check bags per roll and rolls per carton against your order.
Flat and Printed Bag Samples
A plain flat bag leaves most of the front open for artwork. Hanging holes, a sealing flap or integral handles change how you display, close or carry it.
Hanging Flat Bags
Holes along the top edge allow the bag to hang.
Self-Seal Packing Bags
A wide flap folds over the opening.
Purple-Print Carry Bags
The handles are cut from the same film as the printed front.
What Is a Cornstarch Bag Made Of?
Corn starch is one ingredient in a formulated film. Ask which polymers are in the blend and for evidence of any plant-based percentage you plan to print.
- Starch-Based Blends
We review PBAT/starch-based compounds for the intended bag format and handling requirements. - PLA in the Blend
PLA/PBAT/starch blends can be considered where the formulation suits the application. - Use Comes First
Choose the format for the job: garment bags for folded clothing, or mailers for the shipping outer. - Check the Claim
Confirm the composition and disposal conditions before approving environmental wording. Review the decomposition evidence checklist when assessing a claimed breakdown time.
Flat, Drawstring or Roll?
For hand packing, decide whether the top should stay open or close with a cord. For repeated dispensing, try separating individual bags from a roll.
- Flat opening
Leave the top open if packers need to slide the item directly into an inner bag. - Drawstring
Fill the sample before pulling the cord. Check how much usable height remains below the gathered top. - Bags on a roll
Give the number of bags you want to tear off one refill and how the roll will be stored or dispensed. - Perforation
Tear one bag off the roll and inspect the seal on the next bag.
Measure the Filled Bag, Then Set the Film
A flat width and length can look correct while leaving too little room for a bulky product. Use the packed contents to check the sample.
- Width and Length
State finished bag width and length in mm or cm, and identify which side opens. - Room for the Contents
Allow for the product’s depth and the space needed to fill and close the bag. - Film Thickness
Send the requested thickness in microns, or describe the load and handling if it is undecided. - Fit Check
Test the sample with the actual contents before approving its size, closure and handling.
Print on the Selected Film
The same ink can look different on opaque and translucent film. Look at the logo on a printed sample in the color you plan to order.
- Film color
Look at the ink against the actual film. A change from clear to colored film changes the background behind the logo. - Logo Placement
Position your logo on the usable face, allowing space for seams and the opening. - Printed Information
Add the product information and instructions your buyers need without crowding the design. - Artwork Approval
Confirm the artwork, colors and wording before the printed sample becomes the production reference.
Specify Pieces, Packs and Rolls Separately
A carton of 20 rolls tells you little unless you know how many bags are on each roll. List both counts on the order.
- Flat packs
Decide how many loose bags a packer should receive at once. - Bags per Roll
For roll formats, define the bag count and roll arrangement together with the bag size. - Carton contents
List packs per carton for loose bags or rolls per carton for refills. - Carton marks
Give different sizes or print designs their own carton reference.
Three Checks before Switching Film
Keep your current bag, a sample of the proposed film and any required environmental wording together when comparing options.
PBAT and Starch-Based Compounds
We can sample PBAT/starch compounds and, where appropriate, PLA/PBAT/starch blends. If you need a specific plant-based content, ask for the composition of the quoted compound.
Discuss the Compound
Replacing a PE Reference Bag
Pack the same item in your PE bag and in the new sample. Try filling and closing each one, then check the seams after handling.
Compare Bag Requirements
Evidence for the Finished Product
We currently have no compostability certificate or test report for the finished bag. Tell us the scheme and market you require before commissioning a sample.
Discuss Your Requirements
From Film Roll to Finished Bag
Once the film reaches the specified width and thickness, we print it if required, cut and seal the bags, then add the drawstring or roll perforation where ordered.
Cornstarch Bag Size & Thickness Guide
The table includes flat, drawstring and roll examples. Start with dimensions that fit the contents, then check the opening and film on a sample.
We quote film thickness as the total of both bag walls in microns (µm). The table gives reference figures. Confirm how each was measured before using it for an order.
Swipe the table sideways to view every column.
| Bag style | Reference size (cm) | Reference thickness (µm) |
|---|---|---|
| Star-sealed roll bag | 34 × 40 | 11 |
| Star-sealed roll bag | 35 × 45 | 11 |
| Drawstring bag | 43 × 47 | 25 |
| Drawstring bag | 45 × 50 | 28 |
| Drawstring bag | 50 × 60 | 30 |
| Side-welded liner on a roll | 58.5 W × 60 H | 25 |
| Refuse liner on a roll | 71 W × 97.5 H | 30 |
| Drawstring bag | 74 × 45 | 30 |
Get a Quote for a Starch-Blend Bag
Send the size or a photo of a current bag, the quantity and what you’ll pack. Include any blend or disposal wording your buyer requires. Shipping time is additional.
Get a Custom Quote1,000 pcs
Minimum order quantity
3–5 days
Custom samples after payment
7–9 days
Production after payment
Cornstarch Bag Ordering Questions
Corn starch is part of a formulated film that can contain other polymers. Ask for the composition of the particular compound before using a percentage or a “plastic-free” claim.
Cornstarch film alone tells you nothing about home-composting conditions. We currently have no home-composting certificate or other compostability report for the finished bag. Tell us if your market requires one before ordering.
Yes. Send the PE bag and tell us what you pack in it. Try the same contents in the proposed blend to compare the fit and seams, even if the films have the same thickness.
The minimum is 1,000 bags. Give us the quantity for each size, format and design. We’ll confirm in the quote which runs can be combined.
Existing samples are free. A custom sample costs US$30–50 and takes 3–5 days to make after payment. We refund the full sample fee with a bulk order. Shipping is separate. See the existing and custom sample options.
Allow 7–9 days for production after payment, plus shipping. Give us your arrival date and confirm the compound, size and artwork before we run the film. See the production and delivery process.