---
title: "Pre-opened bags on a roll, for autobag machines | JMP"
description: "Custom pre-opened LDPE poly bags on a roll for autobag machines: mouths already open, perforated to your machine's pitch. Made locally in Tangerang, Indonesia."
url: "https://jayamandiripackaging.com/en/products/polybag/pre-opened-roll-bag"
language: "en"
alternates:
  - { language: "id", url: "https://jayamandiripackaging.com/id/produk/polybag/pre-opened-roll-bag" }
---

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4. Pre-opened bags on a roll, for autobag machines

![Pre-opened roll bag film coming off the machine at JMP, perforated and wound ready to run.](https://jayamandiripackaging.com/photos/moments/roll-bag-2024/02.webp) 

Products · Polybag

# Pre-opened bags on a roll, for autobag machines

An autobag machine cannot run ordinary polybags. It needs bags that are already open at the mouth and joined on a roll, perforated at exactly the right pitch — a little out and the machine jams. We extrude the film ourselves and cut it to your machine and part spec rather than to a stock size. Few makers in Indonesia produce these locally; the usual alternative is importing them.

## Specification

__Pre-opened bags on a roll, for autobag machines specification__
| Construction | Pre-opened bags, joined on a roll Mouths already open; bags separated by perforation rather than cut loose |
| --- | --- |
| Material | LDPE We extrude the film in-house rather than buying it in and converting |
| Film thickness | 30–120 µm Set by part weight and machine spec — not one figure for every job |
| Bag width | 5–100 cm |
| Bag length | 5–70 cm |
| Perforation pitch | Matched to your machine The dimension that most often goes wrong when bags are bought off a stock size |
| Printing | Flexo — standard on roll bags Part codes, orientation marks, or handling warnings |
| Autobag systems we supply | Autobag® PaceSetter PS 125 & PS 125 OneStep, Brand 500, Brand 550 The Brand 550 runs up to 45 bags per minute |

Printed polybag MOQ is counted by weight, not by the piece: 200 kg for a regular design, with the print cylinder quoted separately from the per-kilogram price. How many pieces come out of that weight depends entirely on bag size and micron, so we work the piece count out once your specification is settled.

[All polybag](https://jayamandiripackaging.com/en/products/polybag)

## Commonly used for

* Automated assembly lines running an autobag machine
* High-volume automotive part bagging without adding operators
* Lines currently dependent on imported bags

## Read next

[Pre-opened bags on a roll for autobag machines: when and why](https://jayamandiripackaging.com/en/articles/pre-opened-bags-on-a-roll) (Polybag) — Pre-opened LDPE bags on a roll for autobag machines on automated assembly lines — how they differ from an ordinary polybag, when they make sense, and why they're custom.

[Custom PE/PP polybags](https://jayamandiripackaging.com/en/products/polybag) (Product) — 5–100 cm wide, 30–120 micron, flexo printed — MOQ is counted by the kilogram, not by the piece.

[How to choose a polybag factory (and what to specify)](https://jayamandiripackaging.com/en/articles/how-to-choose-a-polybag-factory) (Polybag) — Not every supplier calling itself a polybag factory extrudes its own film. Three questions that separate them, and the spec you should have ready before you request a quote.

## Got a specification to check?

Send the part dimensions, your rough monthly volume, and a photo of the part. No technical drawing yet is fine — we work it out from there.

[ 10-Minute Chat · WhatsApp ](https://wa.me/6281384833969)

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