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Net-like structure

a network structure and network technology, applied in the field of network structure, can solve the problems of difficulty in changing the cushioning performance by itself, no consideration has been made for sitting from both sides, from the side of the surface layer, etc., and achieves the effect of reducing contact area, soft cushioning feeling, and small difference in compression durability

Inactive Publication Date: 2018-10-04
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a net-like structure that has cushioning performance different between the front and back faces, resulting in a small difference in compression durability. This allows for reversible use and provides a desirable cushion material for office chairs, furniture, sofas, beddings, and vehicles. The net-like structure can improve compression durability compared to conventional products, even when using thin-size fibers having a solid cross section as the front face.

Problems solved by technology

However, in these net-like structures, with some exceptions, there has been no concept of differentiating the front from the back, with the same cushioning feeling given whichever face is used.
A net-like structure has unique cushioning performance, but has found difficulty in changing the cushioning performance by itself.
However, no consideration has been made for use of sitting from both sides, from the side of the surface layer and from the side of the base layer.
This has however problems that the production cost is high and that the cushioning feeling may change by using an adhesive, causing a feeling of strangeness.
In addition, there has been a problem that compression durability is greatly different between both faces.

Method used

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Examples

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examples

[0094]While the present invention will be described hereinafter concretely with reference to examples, the present invention is not limited to these examples. Measurement and evaluation of property values in examples were performed in the following manners. Note that, while the sizes of specimens described below were considered standard, a possible specimen size was used for measurement when the quantity of specimens was insufficient.

[0095](1) Fiber Size (Mm)

[0096]A specimen was cut into a size of 10 cm wide×10 cm long×specimen thickness, and linear bodies of 10 solid-section fibers and 10 hollow-section fibers were collected by a length of about 5 mm randomly in the thickness direction from the cut cross section. The collected linear bodies were observed with an optical microscope with an appropriate magnification, focusing on a fiber size measurement point, to measure the fiber size as viewed from the fiber side face. As the average fiber size, the average in each of regions diffe...

example i-1

[0135]As a polyester-based thermoplastic elastomer, dimethyl terephthalate (DMT) and 1,4-butanediol (1,4-BD) were put together with a small amount of a catalyst, and, after ester exchange by a usual way, subjected to polycondensation with addition of polytetramethylene glycol (PTMG) having an average molecular weight of 1000 while temperature rise and pressure reduction were being performed, to produce a polyether-ester block copolymerized elastomer. Thereafter, with addition of 1% of an antioxidant, the resultant elastomer was mixed and kneaded, then pelletized, and dried in a vacuum at 50° C. for 48 hours, to obtain a polyester-based thermoplastic elastomer (A-1), which had a soft segment content of 40 wt % and a melting point of 198° C.

[0136]As a nozzle, used was one having a nozzle effective face having lengths of 50 cm in the width direction and 67.6 mm in the thickness direction, on which triple bridge hollow forming orifices having an outer size of 3 mm and an inner size of 2...

example i-2

[0140]A net-like structure was obtained in the same manner as in Example I-1 except that cooling water was provided at a position 32 cm below the nozzle face. The obtained net-like structure was a net-like structure having a solid-section fiber main region mainly including solid-section fibers, a hollow-section fiber main region mainly including hollow-section fibers, and a mixed region including solid-section fibers and hollow-section fibers in a mixed state, located between the solid-section fiber main region and the hollow-section fiber main region, where these regions were integrated, not separated from one another. The hollow-section fibers were formed of hollow linear bodies having a triangular rice-ball shaped hollow cross section, a hollowness of 20%, and a fiber size of 0.55 mm, and the solid-section fibers were formed of solid linear bodies having a fiber size of 0.42 mm. The difference in fiber size was 0.13 mm, the total weight ratio of the solid-section fibers was 38%, ...

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Abstract

A net-like structure has a three-dimensional random loop bonded structure constituted of a thermoplastic elastomer continuous linear body having a fiber size of greater than or equal to 0.1 mm and less than or equal to 3.0 mm. The net-like structure has, in the thickness direction, a solid-section fiber main region mainly including solid-section fibers, a hollow-section fiber main region mainly including hollow-section fibers, and a mixed region including solid-section fibers and hollow-section fibers in a mixed state, located between the solid-section fiber main region and the hollow-section fiber main region. Both solid-section fiber main region-side residual strain of the net-like structure and hollow-section fiber main region-side residual strain of the net-like structure are less than or equal to 20%, and the difference between the solid-section fiber main region-side residual strain and the hollow-section fiber main region-side residual strain is less than or equal to 10 points.

Description

TECHNICAL FIELD[0001]The present invention relates to a net-like structure suitable for a net-like cushion material used for office chairs, furniture, sofas, beddings such as beds, seats for vehicles such as trains, automobiles, two-wheeled vehicles, baby buggies, child safety seats, and wheelchairs, and shock-absorbing mats such as floor mats and members for preventing collision and nipping, etc.BACKGROUND ART[0002]At present, as a cushion material used for furniture, beddings such as beds, and seats for vehicles such as trains, automobiles, and two-wheeled vehicles, a net-like structure is increasingly used. Japanese Patent Laying-Open No. H7-68061 (PTD 1) and Japanese Patent Laying-Open No. 2004-244740 (PTD 2) disclose methods for manufacturing a net-like structure. Net-like structures have merits, compared with foamed-crosslinked urethane, of having a comparable level of durability, being excellent in moisture and water permeability and air permeability, and being low in heat st...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D04H3/018D04H3/011D04H3/16D04H3/05
CPCD04H3/018D04H3/011D04H3/16D04H3/05A47C31/00B60N2/58A47D15/00B60N2/2881A61G5/1043A47G27/0212A47C27/002B61D33/0035B62J1/00D10B2505/08D10B2401/06A47C27/12A47G27/02B68G3/00B68G11/03
Inventor KOBUCHI, SHINICHITANINAKA, TERUYUKIWAKUI, HIROYUKIKURAMOTO, TAKAHIROFUKUNISHI, NORIKIINOUE, TAKUOYASUI, AKIFUMI
Owner TOYOBO CO LTD