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Article comprising multilayer film

A multi-layer film and product technology, applied in the direction of layered products, synthetic resin layered products, decorations, etc.

Active Publication Date: 2019-07-23
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This technique requires additional processing steps and the fabrication and use of patterned rolls for each desired final texture or structure

Method used

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  • Article comprising multilayer film
  • Article comprising multilayer film
  • Article comprising multilayer film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] use as image 3 with Figure 3A The device shown was fabricated using a seven-layer annular stack mold (commercially available from Labtech Engineering, Samut Prakan, Thailand, under the trade designation "COEX 7-LAYER" (type LF-400) A seven-layer film, except that there are only seven stacked templates. Airflow to the mold was manually controlled to achieve a blow-up ratio of approximately 2:1. The bubble then collapses and rolls up about 3 meters (10 feet) above the mold. The feed material was supplied by seven separate 20mm diameter extruders with a length to diameter ratio of approximately 30:1.

[0074] The first extruder was used to melt and extrude low density polyethylene (commercially available from LyondellBasell, Houston, TX under the trade designation "PETROTHENE NA217000 5.6 MFI") into annular In the inner channel of the stacking mold. The melting temperature was maintained at 180°C. The second extruder and the third extruder were used to feed the sam...

Embodiment 2

[0077] Polymer multilayer films were prepared as described in Example 1, except that the first extruder, second extruder, third extruder and fourth extruder contained only low density polyethylene; Five extruders filled with the same chemical blowing agent and styrene-ethylene-butylene-styrene (SEBS) copolymer (available from PolyOne Corporation, Avon Lake, Ohio under the trade designation "KRATON G 1657") , Avon Lake, OH)); and the sixth and seventh extruders contained ethylene vinyl acetate copolymer (commercially available from West Lake, Houston, Texas under the trade designation "WESTLAKE EF446") Chemical Company (Westlake Chemical Corporation, Houston, TX)). For layers containing chemical blowing agents, a melting temperature of 215°C was maintained. For all other layers, a melting temperature of 180°C was maintained. The mold was kept at 180°C.

[0078] Images of the resulting polymer multilayer films are shown in Figure 5 with Figure 5A middle.

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Abstract

The invention provides an article comprising first and second continuous polymeric layers having at least one polymeric layer exhibiting a random network of strands and connective regions disposed between the first and second continuous polymeric layers. In some embodiments, the article is a tape and polymeric multilayer film having a slip resistant surface.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Patent Application 62 / 432,337, filed December 9, 2016, the disclosure of which is incorporated herein by reference in its entirety. Background technique [0003] It is desirable to prepare polymeric films and film composites with structures and / or textures to provide additional functionality. Such functions may include optical effects, and / or enhanced liquid absorption or solid retention due to the increased surface area of ​​a textured surface relative to a smooth surface. [0004] Texture or structure can be added to a polymer film, for example, by casting molten polymer onto a patterned chill roll. This requires the use of specific patterned rolls for each desired textured or structured film. Alternatively, the patternless polymer film can be embossed after the film making process by reheating at least a portion of the film surface and passing between high pre...

Claims

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Application Information

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IPC IPC(8): B32B5/18B29C48/10
CPCB32B2307/409B32B5/142B32B5/18B32B7/06B32B27/08B32B27/20B32B27/302B32B27/306B32B27/32B32B2250/05B32B2250/24B32B2264/105B32B2270/00B32B2274/00B32B2307/21B32B2307/306B32B2307/4023B32B2307/4026B32B2307/51B32B2307/58B32B2307/5825B32B2307/584B32B2307/71B32B2307/734B32B2307/746B32B2307/748B32B2451/00B29C48/10B29C48/0022B29C48/21B29C48/23B29C48/3366B29C48/0018B29L2023/001B32B27/065B32B2266/025
Inventor 杰弗里·O·艾姆斯兰德雅各布·D·扬乔治·J·克莱门茨克里斯托弗·J·罗特尔
Owner 3M INNOVATIVE PROPERTIES CO