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Multilayer films, and articles made therefrom

A multi-layer film, surface layer technology, applied in the direction of layered products, layered product processing, synthetic resin layered products, etc., can solve problems such as poor adhesion, adverse effects on adhesion, and pinhole damage

Active Publication Date: 2018-05-11
DOW QUIMICA MEXICANA S A DE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A major challenge observed when using ultrasonic bonding is that, when using different types of materials for nonwoven substrates and films (e.g., polyethylene-based films laminated to polypropylene nonwoven substrates), the bonding Sexuality is adversely affected, often resulting in poor bonding between the two
Also, may cause pinholes that disrupt the liquid barrier function of the backing

Method used

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  • Multilayer films, and articles made therefrom
  • Multilayer films, and articles made therefrom
  • Multilayer films, and articles made therefrom

Examples

Experimental program
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Effect test

example

[0104] The embodiments described herein can be further illustrated by the following non-limiting examples.

[0105] Three-layer films were prepared as outlined below. The films were produced on a three-layer commercial casting line with a maximum line speed of 200 m / min, a melt temperature of 260°C, a die temperature of 260°C, a die gap of 0.8 mils, and an air gap of 9 inches. The multilayer film has a basis weight of 14 gsm. The core layer accounts for 70% of the overall film thickness. Each skin layer accounted for 15% of the overall film thickness.

[0106] Prepare the film of the present invention

[0107] The following resins were used in the inventive examples: Low-density polyethylene (LDPE), which is a high-pressure low-density polyethylene made in an autoclave reactor with a density of 0.918 g / cc and a melt index of 8.0 g / 10 min (commercially available LDPE 722 from U.S. Dow Chemical Company); an isotactic polypropylene homopolymer having a density of 0.900 g / cc a...

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Abstract

A multilayer film comprising a core layer and two skin layers, wherein the core layer is positioned between the two skin layers, wherein the core layer comprises a polyethylene composition comprisinga high density polyethylene having a density of 0.930-0.965 g / cc and a melt index of 0.7-10.0 g / 10 min, and wherein each skin layer independently comprises a polypropylene composition comprising greater than 50 wt.%, based on the total weight of the polypropylene composition, of a propylene-based polymer.

Description

technical field [0001] Embodiments of the present disclosure relate generally to multilayer films and applications of multilayer films to make articles, such as ultrasonically bonded laminates. Specifically, the present disclosure relates to multilayer films that are not breathable. Background technique [0002] To provide good feel such as softness and low noise while still providing cloth-like backings used in hygienic absorbent products such as diapers, adult incontinence products and feminine hygiene products with sufficient barrier properties to perform their primary function of containing fluids . Cloth-like backings typically comprise a nonwoven substrate and a film laminated together and depending on the lamination technique involved, the hand of the backing can vary. Several different lamination techniques exist for joining films and nonwovens, and may include, for example, extrusion coating, hot melt adhesives, solvent-free adhesives, and ultrasonic bonding. Eac...

Claims

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Application Information

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IPC IPC(8): B32B5/02B32B27/08B32B27/12B32B27/32
CPCB32B5/022B32B27/12B32B27/32B32B2270/00B32B2307/54B32B2307/558B32B2307/581B32B2307/718B32B2555/00B32B2555/02B32B27/08B32B2323/043B32B2323/10B32B2323/046B32B2310/028B32B2250/03B32B2250/04B32B2250/242B32B2250/40
Inventor F·阿特亚加拉里奥斯J·A·德古鲁特V·凯莉哈里
Owner DOW QUIMICA MEXICANA S A DE