Contact Info

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HEADQUARTERS
Polyonics, Inc.

28 Industrial Park Drive
Westmoreland N.H. 03467
Ph: +1.603.352.1415
Fax: +1.603.352.1936
Email: info@polyonics.com

Toll Free: (888) 765-9669

SINGAPORE
Polyonics Pte Ltd

Richfield Industrial Centre
120 Eunos Avenue 7, #01-01
Singapore, 409574
Ph: 65-6542-5484
Fax: 65-6542-5185
Email: infoasia@polyonics.com

SHANGHAI
Polyonics, Inc.

Unit 1004A Xin Cheng Mansion
No. 167 Jiangning Road
Shanghai, China 200041
Phone 86-21-6258-0571
Fax: 86-21-6258-0579
Email: infoasia@polyonics.com

DONGGUAN
Polyonics, Inc.
Asia Technical Center
Fuwei Mansion Rm 411
Hongtu Road 88
Nancheng District
Dongguan, Guangdong, China 523078
Phone: 86.755.8825.0441
Fax: 86.755.8825.2429
Email: infoasia@polyonics.com

About Release Liners

xxThe release liner is the base layer of all Polyonics single and double coated tapes and label materials. Its primary function is to protect the acrylic and silicone pressure sensitive adhesive (PSA) until the tape or label is ready to be applied. The liner also helps in material handling, determines the ease of which the liner is removed from the PSA and is a critical element of the die cut process.

The liner is comprised of a carrier―paper, polyester (PET) or fluorinated PET―and an ultra thin layer of silicone. The percentage of silicone determines the release value with the higher percentage of silicone producing a lower release value and an easier release of the liner from the PSA. Release values are typically in the 20 to 50 pound range with the combination of carrier (material, thickness, etc.) and release value chosen based on the requirements of the die cut process.

The release value is also carefully chosen for automated applications where the label or tape must easily strip onto the applicator head to then be automatically applied to a part’s surface. Double coated tapes in auto apply applications will typically have different release values for each of its two liners. The liner removed prior to the application of the die cut part will have a lower release value than liner removed after part application.

Silicone PSAs require fluorinated PET release liners and certain tapes and label materials, such as those destined for automatic applications, may require harder glassine or PET liners, to facilitate the die-cutting process.

50# SCK liner: Super Calendared Kraft, 3.2 mils +/-0 .3 mils. Due to its high internal strength it will withstand all conventional die cut operations. It is used for all of our acrylic based tape products and on the two mil label materials.

55# Glassine liner: 3.1 mils +/- 0.2 mils. These liners are denser than 50# SCK liners and provide a harder and thinner base for die-cutting.

PET: 1.5mil +/- 10%. A clear silicone coated PET film with extremely high internal strength, low heat shrinkage, excellent stiffness, high clarity and surface smoothness. It is sometimes used in auto-apply applications when 50# SCK and 55# glassine don’t perform well or in situations when the automatic applicator needs a clear liner for label sensing.

20# Fluorinated PET liner: 2mil. Used for all silicone PSA applications.

Lay flat liners: Available as a custom construction to aid the die cut and auto apply processes.

Custom liners: Customers are allowed to supply their own liner for custom constructions.

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Polyonics at a Glance

Polyonics is a renowned manufacturer of high performance, custom film, tape and label materials used by specialty die-cut converters worldwide. Founded in 1995, and ISO 9001:2008 registered, Polyonics strategically designs single and double coated polyimide, polyester and aluminum films for the extreme temperatures and harsh environments found in the electronics, automobile, aerospace and medical industries.

Polyonics is an ESOP company and operates with the highest level of business integrity and ethical standards. It is regarded as a good employer, community citizen and committed to education, training and staff development. All of its products are continuously evaluated to make sure they meet the strictest international environmental regulations, are earth friendly, sustainable and possess the smallest carbon footprint possible.