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Rugged elastic nonwoven fabric and method for manufacturing the same

A manufacturing method and technology of non-woven fabrics, applied in textiles and papermaking, non-woven fabrics, layered products, etc., can solve the problems of stretch resistance, loss of hand feel, low bulkiness of sheets, etc., to prevent shrinkage, excellent Stretchable, uniform texture

Active Publication Date: 2012-10-31
JNC CORP +1
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  • 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
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  • Rugged elastic nonwoven fabric and method for manufacturing the same
  • Rugged elastic nonwoven fabric and method for manufacturing the same
  • Rugged elastic nonwoven fabric and method for manufacturing the same

Examples

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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
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Abstract

To provide a rugged elastic nonwoven fabric with high elasticity, high strength and also excellent feeling, in which a first fibrous layer containing heat-shrinkable fibers (1A) being latent crimp conjugate fibers, and a second fibrous layer containing heat-fusible heat-shrinkable fibers (2A) or non-heat-shrinkable fibers (2B) both having smaller shrinkage as compared with the fibers (1A) are laminated, and both of the fibrous layers are partially bonded and united with a number of bonded parts arranged at intervals, wherein a maximum shrinkage development temperature of the first fibrous layer is 135 DEG C or higher, a melting or softening point of a heat-fusible component of the fibers (2A) or (2B) is 70 DEG C or higher to 130 DEG C or lower, the second fibrous layer between the bonded parts is projected in a convex by shrinking of the first fibrous layer, and fibers constituting the first fibrous layer are not bonded with 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
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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/50D04H1/542D04H3/00D04H3/14
CPCB32B5/26D04H1/54D04H1/66D04H1/544D04H1/4374D04H1/55D04H1/541D04H1/50D04H13/00D04H1/06D04H1/559D04H1/5412D04H1/5414Y10T428/2481
Inventor 寺田博和
Owner JNC CORP
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