Printing On Non Woven Poly Bags

December 15, 2009 at 5:40 pm 5 comments

A popular topic on our e-mail inquiries has been how to print those trendy non-woven polypropylene bags.  Every major store seems to have their own, yet the print quality on most of the bags is usually poor, with the print being easily scratched off. 

 

Here is John Levocz, International Coatings’ North-East Regional Sales Manager with tips on how to print on this material:

 

“Non-woven fabrics are sheet or web structures bonded together by entangling fibers mechanically, thermally or chemically. They are flat, porous sheets made directly from separate fibers or from molten plastic or plastic film.

 

Non-woven polypropylene is a practical fabric because it is strong and extremely lightweight. Most of these bags are made from recyclable plastic. This being said, they present a problem when they need to be screen printed. These new materials will not withstand the 325 degrees F (163º C) needed to cure plastisol inks.

 

The best way to screen print these materials is to use a low cure additive in combination with plastisol ink to achieve a full cure at 275 degrees F (135 º C).  By doing this, the ink will be cured without melting or distorting the material.

 

Since there are so many different poly substrates in the market today, ALWAYS test your print and material prior to production.”

International Coatings does have a low-cure, Phthalate-free additive available:  3804 Low-Cure Additive, available nationwide from our network of distributors.  Also see related product post from October 19, 2009 for more information on the 3804 Low-Cure product.

 

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5 Comments Add your own

  • 1. jberry  |  April 22, 2011 at 8:50 pm

    Those printed poly bags look really nice. Where can I find the black ones?

    Reply
  • 2. Top 5 Ink Products « International Coatings Blog  |  September 8, 2011 at 10:55 am

    [...] 1)                  900 Series Nylon Printing Inks – For decades, International Coatings’ 900 Series inks for nylon substrates have been an industry favorite.  The 900 Series is versatile and can also be printed on cotton and poly/cotton blends.  Add the 900 Catalyst for nylon printing or add the 3804 Low-Cure Additive to print on those popular polypropylene bags. (For more info on how to print polypropylene bags, see our previous blog:  Printing on Non-Woven Poly Bags). [...]

    Reply
  • 3. RAJU BHAI  |  December 26, 2012 at 10:09 am

    Sir, I do screen printing on non woven bags I use normal PVC inks which gets removed on scratching,I want to know which type of ink I should use so that it has strong bonding, shining and fast curing.please suggest me.

    Reply
  • 5. International Coatings  |  November 5, 2010 at 12:00 am

    Dear Sanjay,

    Thank you, for the question and your interest in International Coatings inks.

    If you will supply me with a better understanding of the substrates you wish to decorate, I can better guide you through the process.

    If your non woven material is similar to the non woven polyethylene or polypropylene bags we see used here in the US for advertising specialty purposes, the answer is fairly straightforward.

    The printing is done through mesh counts ranging from 86 – 160 t/in (34-63 t/cm).

    Inks used are the 900 or 9000 series nylon inks with the addition of 6% by weight 3804 Low Cure Additive. Note that catalyst is not necessary on this material.

    Squeegees will range from soft to medium hardness and are usually sharp.

    Curing or fusing the inks at a temperature of 270° to 290° F. This is normally done through a conveyor oven.

    Once cured the inks are durable enough to withstand normal use without deteriorating. These bags are not recommended for washing, but the inks should be able to endure light washing with no deterioration.

    Forward me any questions you may have along with a better description of the material and the proposed use for this material. I will be happy to help you determine the correct way to decorate these items successfully.

    Best regards,

    Kent Hudson

    International Coatings Company

    khudson@iccink.com

    336.722.3576

    Reply

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