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Web liner with partially embedded filaments

A precursor and liner technology, applied in the direction of film/sheet release liner, film/sheet adhesive, thin material processing, etc., can solve the problem of damaged appearance, pressure-sensitive adhesive damage, and labor-intensive And other issues

Active Publication Date: 2018-03-27
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Attempts to adhere the same film to the substrate multiple times may damage the pressure sensitive adhesive or increase the likelihood of the film being uneven or misaligned on the substrate
Perforating the membrane will damage its appearance
And removing air bubbles is quite labor-intensive.

Method used

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  • Web liner with partially embedded filaments
  • Web liner with partially embedded filaments
  • Web liner with partially embedded filaments

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Example 1: Pad with partially embedded strands

[0083]Liner L1, release surface facing up, was fed through a heated nip consisting of a rubber roll on top (Roll 1 ) and a steel roll on the bottom (Roll 2 ) at 60 ft / min. The nip pressure was 40 psi. The nip heat exchanger for both rolls was set to 240°F (116°C) and the exiting pad temperature was estimated to be 206°F with an infrared thermometer. Resin R1 was heated at 480°F (249°C) in an extruder with a screw diameter of 50 mm and an L / D of approximately 32:1 and passed through a 2 inch die with 60 holes per inch Extrude onto a room temperature steel roll (roll 3). The die holes were drilled with a 0.008 inch (0.20 mm) opening. The extrusion rate was measured to be an average of 0.14 lb / hr, but varied due to the low extruder speed.

[0084] The resulting extruded strand is drawn over 5 inches and contacts the side of a smooth steel roll (Roll 3) and is then clamped with a heated pad on a heated roll (Roll 2) so ...

Embodiment 2

[0086] Example 2: Film laminated to a liner with embedded filaments

[0087] A length of pad with embedded strands (according to Example 1 ) was placed on a hard flat table with the embedded strands facing up. A slightly larger length of reflective graphic film F1 is then laminated to the liner: First, a small length of film F1 is aligned with the liner containing the strands and manually secured to the bench. A rubber roller (similar to p / n EDI: 19560, available from Marshalltown Company, Marshalltown, IA) was then placed on the adhered portion of film F1 and advanced so that Film F1 was laminated to a liner with embedded filaments.

Embodiment 3

[0088] Example 3: Repositionable adhesive film with strands

[0089] The laminate of Example 2 was separated manually, thereby removing the liner L1 used in Example 1 from the film F1. When the two films were separated, the filaments remained on the adhesive side of film F1. This forms an adhesive-backed film with partially embedded strands.

[0090] An adhesive-backed film with partially embedded strands is placed adhesive side down on a surface with no additional pressure applied (i.e., no hard pressing), thereby rendering the strands resistant to adhesion The agent layer is in close contact with the surface. The adhesive-backed membrane with partially embedded strands was then moved and repositioned by pulling on the corners of the membrane. Once the membrane is lightly pressed, the membrane adheres to the surface. When pressed harder, more adhesive bonds to the surface, increasing bondability.

[0091] Another sample of the adhesive-backed film with partially embedd...

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Abstract

A release liner having filaments contacted to a major side thereof, then pressed thereinto. The filaments may be a thermoplastic or thermoset type material.

Description

Background technique [0001] Pressure sensitive adhesives can be used to join the two materials. The interface between the adhesive and the two materials is extremely important to the properties of the materials being joined. Loss of adhesion at either interface can lead to material failure. [0002] An example of an adhesive interface that requires peak performance is a durable film displaying an image graphic adhered to a substrate, where the film is a backing material to which an adhesive layer is added for adhesion to the substrate. The process of adhering large image graphic films to substrates suffers from the problem of entrapment of air between the film and substrate. Anyone who has ever attempted to wallpaper can understand the frustration that can arise with an adhesive backed film not being easily removed when air is trapped underneath. The most common solutions to this problem are to remove the membrane and reapply it, or to perforate the membrane to release entr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C59/02C09J7/40C09J7/35C09J7/38
CPCB29C70/16C09J7/38C09J7/403C09J2301/204C09J2301/202C09J7/20C09J7/405C09J7/401C09J2301/304C09J2301/302Y10T428/1476C09J7/35
Inventor 詹姆斯·P·恩德勒弗兰克·T·谢尔帕特里克·J·叶舍
Owner 3M INNOVATIVE PROPERTIES CO
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