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Film constructions and articles

A structure and product technology, applied in the field of masking tape, can solve the problem of difficult to tear the backing tape by hand

Inactive Publication Date: 2018-12-21
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Polyethylene, vinyl, and other current polymer-backed tapes can be difficult to tear by hand and may require additional manufacturing steps to make them hand-tearable

Method used

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  • Film constructions and articles
  • Film constructions and articles
  • Film constructions and articles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0112] Embodiment 1 is a film construction comprising: a backing having a first major surface and a second major surface, wherein the backing comprises at least one polylactic acid and ethylene-containing copolymer a backing layer of a mixture, the ethylene-containing copolymer comprising a polar comonomer; a tie layer disposed on the first major surface of the backing; and a release layer, the release layer placed on the adhesive layer.

[0113] Embodiment 2 is the film construction of embodiment 1, wherein the tie layer comprises a mixture of at least two different ethylene-containing copolymers, each copolymer independently comprising a polar comonomer.

[0114] Embodiment 3 is the membrane construct of embodiment 2, wherein the at least two different ethylene-containing copolymers each independently comprise different amounts of a different polar comonomer or the same polar comonomer.

[0115] Embodiment 4 is the membrane construct of embodiment 2 or 3, wherein the at lea...

Embodiment 1-5

[0190] Examples 1-5 were prepared using the compositions shown in Table 1 below. The backing component was dry blended and added to the first single screw extruder feeding the blown film plant. The tie layer components were dry blended and added to the second single screw extruder feeding the blown film plant. The release layer components were dry blended and added to the third single screw extruder feeding the blown film plant. For the release layer, the release agent 1 component was provided as a masterbatch of LDPE 1:release agent 1 / 85:15 / (wt / wt) prepared as above.

Embodiment 6

[0192] Example 3 was repeated with the following modifications. For the peel ply, replace the EVA 1 with the same amount of LDPE 1.

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Abstract

The invention relates to film constructions and articles including the film constructions, wherein a film construction includes: a backing having a first major surface and a second major surface, wherein the backing includes at least one backing layer comprising a polylactic acid and an ethylene-containing copolymer comprising a polar comonomer; a tie layer disposed on the first major surface of the backing; and a release layer disposed on the tie layer.

Description

Background technique [0001] Traditional masking tape has used a paper-based backing since its invention in the early twentieth century. Recent advances in technology and materials have opened new avenues for producing polymer-based backings for masking tapes, which offer several advantages over paper-based backings. Polymer-based backings generally do not need to be saturated, primed, or release-coated like paper-based backings, which reduces manufacturing time, eliminates solvents in the manufacturing process, and can reduce process waste. [0002] One of the difficulties to be overcome with current polymer based backings is that they are often difficult to tear apart by hand. For masking tapes, it is generally preferred to have a hand-tearable backing. Polyethylene, vinyl and other current polymer backed tapes can be difficult to tear by hand and may require additional manufacturing steps to make them hand tearable. Contents of the invention [0003] The present disclos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B27/08B32B27/28B32B27/30B32B27/32B32B7/12C09J7/29C09J7/40
CPCB32B7/12B32B27/283B32B27/306B32B27/32B32B27/36B32B2250/03B32B2250/04B32B2250/24B32B2307/5825B32B2307/748B32B2405/00C09J2203/31C09J2423/005C09J2423/045C09J2423/046C09J2431/005C09J2431/006C09J2467/006C09J2475/005C09J2481/005C09J7/401C09J7/405C09J7/29B32B27/08C09J2301/122C09J2301/414
Inventor 迪伦·J·V·沙巴特杰弗里·O·埃姆斯兰德尔伊格内修斯·A·卡杜马克里斯托夫·J·罗瑟马克·E·施瓦茨雅各布·D·扬
Owner 3M INNOVATIVE PROPERTIES CO