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Method for making highly filled nonwoven fabrics

A technology for non-woven fabrics and uses, applied in non-woven fabrics, papermaking, textiles and papermaking, etc., can solve problems such as high cost, and achieve the effect of good mechanical strength and low binder content

Active Publication Date: 2020-04-24
JOHNS MANVILLE EUROPE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Higher numbers of glass nonwovens also require higher costs for multilayer laminates and for comparable thicknesses

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0105] Glass nonwovens were produced according to the wet method (standard method). To this end, chopped glass fibers (16 μ, 24 mm) were dispersed in water and deposited by means of suitable devices on a deposition screen belt. After the excess water has been sucked off, the adhesive is applied by means of foulard.

[0106] The weight per unit area of ​​glass fiber nonwoven fabric is 150g / m 2 (after drying). Binder is then applied to 100g / m 2 The extent, wherein the organic binder content is 8% of the total area weight (after drying) (20g / m 2 ) and the filler content is 32% (80g / m 2 ). Will BASF's 150 is used as an organic binder; the filler is made of ATH (aluminum tri-hydrate). This is followed by complete drying of the nonwoven. The measured calorimeter value of the highly filled nonwoven is equal to about 0.5 kJ / g and thus fulfills the requirements of fire class A1.

[0107] The highly filled nonwoven is then impregnated with B-staged binder. A melamine adhesive...

Embodiment 2

[0110] A nonwoven fabric according to Example 1 was produced, wherein the binder-free nonwoven fabric had a weight per unit area of ​​250 g / m 2 . Binder is then applied to 200g / m 2 The extent, wherein the organic binder content is 8% of the total area weight (after drying) (36g / m 2 ) and the filler content is 32% (144g / m 2 ). Will BASF's 150 is used as an organic binder; the filler is made of ATH (aluminum trihydrate).

[0111] The highly filled nonwoven is then impregnated with a B-staged melamine binder containing fillers. Relative to 195g / m 2 Coating, the coating compound consists of 77% (150g / m 2 ) filler and 23% (45g / m 2 ) made of B-stage binder. The total weight of the nonwoven fabric is equal to 645g / m 2 (contains 4% residual moisture content). The calorimeter value is equal to 2,650 kJ / kg and thus achieves fire resistance class A2.

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Abstract

The present invention relates to a method for producing highly filled nonwoven fabrics. In particular, the present invention relates to a method for producing highly filled, preferably wet-laid nonwoven fabrics, in particular nonwoven glass fiber fabrics, with very low binder content, and nonwoven glass fiber fabrics produced according to this method Fabrics and their uses.

Description

technical field [0001] The present invention relates to a method for producing highly filled, preferably wet-laid nonwoven fabrics, in particular nonwoven glass fiber fabrics, with very low binder content, as well as nonwoven glass fiber fabrics produced according to this method and their use. Background technique [0002] The manufacture of nonwovens, especially wet-laid nonwovens, has been known for more than 50 years and uses methods and apparatus originally developed for papermaking. [0003] In order to produce, for example, wet-laid nonwoven glass fiber fabrics, glass fibers are dispersed in water in so-called pulpers, wherein the glass fiber content is approximately 0.1% to 1% by weight. Here, it must be ensured that the glass fibers are damaged as little as possible during dispersion, ie essentially no fiber breakage occurs. The dispersed glass fibers are temporarily stored in one or more storage containers. The discharge is carried out through the discharge port,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/4209D04H1/587
CPCD04H1/4209D04H1/4218D04H1/587D04H1/64D04H1/732D21H13/40
Inventor 米夏埃尔·凯泽尔克劳斯·弗雷迪克·格雷奇
Owner JOHNS MANVILLE EUROPE GMBH