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Composition of polyurethane permeable microporous thin layer and method for making same

A manufacturing method and air permeability technology, which are applied in the application field of polyurethane resin materials, can solve the problems of polyurethane resin being unable to obtain air permeability characteristics, disappearance of friction resistance characteristics, and stuffy wearing.

Inactive Publication Date: 2006-10-11
FORMOSAN RUBBER GRP
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Problems solved by technology

[0004] However, no matter what kind of processing method is used, since this kind of polyurethane resin cannot obtain good air permeability, it will be stuffy to wear, and the resin of the coating layer will expand due to moisture absorption, so that its friction resistance will disappear. And the adhesive force between the polyurethane resin and the fabric will also decrease.
[0005] In view of this, the present invention is aimed at the above problems, and proposes a composition of polyurethane air-permeable microporous thin layer and its manufacturing method, which can meet the current technical trend of special functional fabrics, and at the same time avoid It is known that fabrics in the moisture-permeable industry are prone to degumming due to water

Method used

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  • Composition of polyurethane permeable microporous thin layer and method for making same
  • Composition of polyurethane permeable microporous thin layer and method for making same

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Embodiment Construction

[0038] The main resin selected in the composition of the present invention is a polyether polyurethane (PU) resin, which is formed by polymerizing polypolyols with a repeating unit of more than four carbons, and the resin after the polymerization is completed, Mix and stir with the matching composition and order, and the weight percentage of pure resin accounts for 10 to 50 weight percent (%) in the whole composition; in addition, surfactants such as emulsifiers are mixed in the polyurethane resin, such as figure 1 In step S10 shown, in the presence of weak solvent, the polyurethane resin can be completely or incompletely emulsified to be coated with microcells and coexist with the weak solvent to present a homogeneous phase or microphase separation.

[0039] Next, as shown in step S12 and step S14, two or more solvents are successively added, which are respectively composed of a mixed solvent of a high-boiling point solvent and a medium-low boiling point solvent, and a mixed s...

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Abstract

The invention discloses a polyurethane permeability microporous cave thin layer component and its manufacturing process, which consists of successively adding more than two solvents into the polyurethane resin of 10-50 mass %, in which the solvents consist of mixed solvents of high boiling point solvent and low-and-moderate boiling point solvent and mixed solvents of strong solvent and weak-and-moderate solvent, and stirring them with a mechanical strength; then supplementally treating with interfacial active agent and bridge agent to construct a component. The said component is dried under different thermostages after being applied to prepare the said permeability microporous cave thin layer, which has good air permeable waterproofing and adhesive ability with the textile, and can not expand because of moisture absorption.

Description

technical field [0001] The invention relates to the application of a polyurethane (PU) resin material, in particular to a composition of a polyurethane air permeable microporous thin layer and a method for manufacturing the thin layer. Background technique [0002] Generally, fabrics are covered with a layer of film for waterproof and moisture-permeable, and hydrophilic polyurethane (PU) resin materials are quite common materials for waterproof and moisture-permeable dry-coated fabrics. [0003] The polyurethane film uses chemical functional groups to conduct moisture. The fabric covered with the polyurethane resin film can be processed in a variety of ways, for example: first coat the fabric with an adhesive layer, and then adhere to the polyurethane film calendered by the calender ; or the fabric is first coated with a release paper film, then coated with an adhesive layer and adhered to the fabric, or coated with an adhesive layer on the fabric first and then directly coa...

Claims

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Application Information

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IPC IPC(8): C08L75/08D06N3/14
Inventor 曾向荣
Owner FORMOSAN RUBBER GRP
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