Unlock instant, AI-driven research and patent intelligence for your innovation.

Concave-convex stretchable nonwoven fabric and manufacturing method thereof

A manufacturing method and technology of non-woven fabrics, which are applied in textiles and papermaking, non-woven fabrics, transportation and packaging, etc., can solve the problems of stretch resistance, low fluffiness of sheets, and impaired hand feeling, so as to prevent shrinkage and improve texture Uniform, excellent elastic effect

Active Publication Date: 2016-07-13
JNC CORP +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, since the sheet material described in Patent Document 1 has very low bulkiness, it has low air permeability and impairs the hand feeling.
In addition, there are also problems such as poor surface smoothness due to friction unique to elastomer resins
In addition, the nonwoven fabric obtained by the method described in Patent Document 2 has problems such as that the strength of the nonwoven fabric is low because its structure is integrated by entanglement.
[0011] Furthermore, the three-dimensional sheet described in Patent Document 3 has the following problem: in the step of heat shrinking treatment, the fibers in the first layer are thermally shrunk and thermally fused, and the fibers are bonded to each other, so the stretchability is hindered and cannot be Show full flexibility

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Concave-convex stretchable nonwoven fabric and manufacturing method thereof
  • Concave-convex stretchable nonwoven fabric and manufacturing method thereof
  • Concave-convex stretchable nonwoven fabric and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0154] Polypropylene with a melting point of 160°C and a melt mass flow rate of 15g / 10min, and an ethylene-propylene copolymer (propylene content of 4% by mass) with a melt mass flow rate of 16g / 10min and a melting point of 130°C, A side-by-side composite fiber (volume ratio: 50 / 50) with a fineness of 2.2 dtex and a fiber length of 51 mm is used as heat-shrinkable fiber (1A), and the weight per unit area is 10 g / m 2 the first fiber layer. In addition, the production unit area weight is 100g / m 2 The same fiber layer, and measure the shrinkage rate, the result is a shrinkage rate of 70%.

[0155] Set the weight per unit area as follows to 10g / m 2 The second fiber layer is superimposed on the first fiber layer, and the second fiber layer is made of polypropylene with a melting point of 160°C and a melt mass flow rate of 15g / 10min, and a melting point of 100°C with a melt mass flow rate of A side-by-side composite fiber (volume ratio: 50 / 50) of 20 g / 10 min of olefin-based elast...

example 2

[0161] Polypropylene comprising a melting point of 160° C. and a melt mass flow rate of 15 g / 10 min, and an ethylene-propylene copolymer having a melt mass flow rate of 16 g / 10 min and a melting point of 130° C. (propylene content 4% by mass), A side-by-side composite fiber (volume ratio: 50 / 50) with a fineness of 2.2dtex and a fiber length of 51mm is used as heat-shrinkable fiber (1A), and the weight per unit area is 20g / m 2 the first fiber layer. In addition, the production unit area weight is 100g / m 2 The same fiber layer, and measure the shrinkage rate, the result is a shrinkage rate of 70%.

[0162] Set the weight per unit area as follows to 10g / m 2 The second fiber layer is superimposed on the first fiber layer, and the second fiber layer is made of polypropylene with a melting point of 160°C and a melt mass flow rate of 15g / 10min, and a melting point of 100°C with a melt mass flow rate of A concentric sheath-core composite fiber (volume ratio: 50 / 50) of 23 g / 10 min o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
softening pointaaaaaaaaaa
temperatureaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

The present invention provides a concavo-convex stretchable nonwoven fabric having high stretchability, nonwoven fabric strength and excellent hand feeling, and a manufacturing method thereof. The present invention relates to a non-woven fabric, which is formed by laminating first and second fiber layers and partially bonding and integrating the two fiber layers through a plurality of bonding parts arranged at intervals. The first fiber layer contains heat-shrinkable fibers (1A) which are latent crimpable composite fibers, and the second fiber layer contains heat-shrinkable fibers (2A) or heat-sealable fibers which are less shrinkable than the heat-sealable fibers (1A) The non-heat-shrinkable fiber (2B) is characterized in that: the maximum shrinkage rate development temperature of the first fiber layer is 135° C. The melting point or softening point of the components is above 70°C and below 130°C, the second fiber layer between the bonded parts protrudes into a convex shape due to the shrinkage of the first fiber layer, and the fibers constituting the first fiber layer are not bonded to each other .

Description

technical field [0001] The present invention relates to a nonwoven fabric having unevenness and excellent stretchability. Background technique [0002] As a method of obtaining a stretchable nonwoven fabric, there is known a sheet obtained by depositing an elastomer resin on a conveyor by a meltblown method, and bonding fibers to each other with a hot roll (see Patent Document 1). [0003] Therefore, there is a method in which fibers with potential crimps are made into a web by a carding method, entangled with a jet of water, and then heat-treated to develop crimps (shrinkage treatment) and give structurally expansion and contraction (refer to Patent Document 2). [0004] As another method, there is a three-dimensional sheet obtained by partially thermocompression-bonding a laminate of the first layer and the second layer in the thickness direction, and performing shrinkage treatment. A layer containing heat-shrinkable fibers having a melting point lower than that of non-h...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/50D04H1/542D04H3/00D04H3/14
CPCB32B5/26D04H1/4374D04H1/50D04H1/54D04H1/559D04H13/00D04H1/5412D04H1/5414Y10T428/2481
Inventor 寺田博和
Owner JNC CORP