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Use of an alloy of thermoplastic starch and pof for the production of an ultra-thin, adhesive waterpfoof/breathable film

A thermoplastic starch, breathable film technology, applied in the direction of adhesive type, ester copolymer adhesive, application, etc.

Inactive Publication Date: 2015-02-25
ARKEMA FRANCE SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, despite the high heating power, it is not possible to obtain thin films with a thickness below 25 μm

Method used

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  • Use of an alloy of thermoplastic starch and pof for the production of an ultra-thin, adhesive waterpfoof/breathable film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach

[0156] According to one embodiment, the waterproof-breathable film of the present invention is prepared directly after the preparation of the alloy according to the following steps: preparation of a blend of one or more POFs with thermoplastic starch (or starch, water and plasticizer), The blend is then melted by heating to a temperature above the melting point of the polymer(s) and above the melting point of the starch so as to form a homogeneous blend in the form of an alloy. The resulting thermoplastic alloy is then drawn to form a thin film. Heating of the POF(s) may be performed separately from the step of heating the starch, followed by blending of the molten POF(s) and starch.

[0157] According to a preferred embodiment of the method of the present invention, the following steps are implemented:

[0158] a) preparing a blend of starch, plasticizer and water;

[0159] b) preparing a hydrophilic POF as defined above;

[0160] c) extruding the blend of step a) and then...

Embodiment

[0182] Waterproof-breathable films were prepared from blends containing different proportions of hydrophilic POF, copolyether-block-amide PEBA, another functionalized polyolefin, and thermoplastic starch. The POF used in the following examples is PEG-grafted POF (27% PEG), here PEG-grafted ethylene (79.9%)-butyl acrylate (17%)-maleic anhydride (3.1%) Terpolymer (Lotader BX3460), or ionomeric POF from Du Pont's Surlyn® range.

[0183] The TPEs used in the following examples belong to the series of hydrophilic PEBAs sold by Arkema, in particular those in which the polyether blocks are derived from polyethylene glycol. In this case, it's the Pebax® MV3000.

[0184] Another functionalized polyolefin optionally used in some embodiments is Lotryl® 28MA07, which is a copolymer of ethylene and n-methyl acrylate with an acrylate weight content of 28%. The starch used is a modified starch (TPS 3947) sold by the company Roquette.

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Abstract

The invention relates to the use of thermoplastic starch for the production of an ultra-thin, adhesive waterproof / breathable film, said thermoplastic starch taking the form of an alloy including at least one functionalised hydrophilic polyolefin obtained either by copolymerisation or grafting of a polyolefin backbone with an unsaturated monomer, said unsaturated monomer being grafted with PEGs and / or forming a metal salt. The film can be used in textile products in medicine, hygiene, luggage, clothing, household equipment, furnishings, carpets, motor vehicles and industry, in particular industrial filtration, agriculture and / or construction.

Description

Technical field [0001] The technical field involved in the present invention is the field of waterproof and breathable film used in the field of fabrics. [0002] This kind of waterproof and breathable film can be permeable and impermeable at the same time. Background technique [0003] Many technical fields require fabrics with improved and extended waterproof and breathable properties.Special -mentioned pharmaceutical fields, medical equipment, surgery robes, carpets, mattresses, bandaging bands, protective clothing; agricultural, agricultural membranes; parcels, packaging; military equipment, maritime equipment, special ship coverage; transportation, aviation, Auto; sports; leisure activities; information, electronic science, furniture; decoration; equipment for infants or children; external equipment; isolation of building walls, thin films under the roof. [0004] Waterproof-breathable film is an deflection film. On the one hand, it will prevent external elements, such as du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18B32B27/12B32B27/32B29C48/10B29C48/305B29C48/32B29C48/92
CPCB32B27/12C08J2351/06C08J2303/02C08J2387/00C08J5/18C08J2323/08B32B27/32B32B5/022B32B5/024B32B7/12B32B27/22B32B2307/724B32B2307/728B32B2410/00B32B2437/00B32B2479/00B32B2605/00B29K2995/0092B29C55/28B29C48/92B29C2948/92704B29C48/10B29C48/2886Y10T428/249985Y10T442/678Y10T442/3886Y10T442/40Y10T442/50B32B2307/73C09J133/08C09J133/14C09J135/02
Inventor B.布吕莱G.勒P.巴班L.B.卡蒂埃F.马莱
Owner ARKEMA FRANCE SA