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Network structure excellent in hydrolysis resistance and production method thereof

A structure and net-like technology, applied in the direction of textiles and papermaking, non-woven fabrics, other seating furniture, etc., can solve the problems of stabilization, difficulty in reuse, easy stuffiness, etc., and achieve excellent hydrolysis resistance and reusability Excellent effect with less decrease in molecular weight

Active Publication Date: 2021-01-12
TOYOBO MC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Foam-cross-linked urethane has good durability as a cushioning material, but has the following problems: poor moisture and water permeability, air permeability, and heat storage, so it is easy to get stuffy
Furthermore, it has been pointed out that there are problems such as that it is difficult to recycle because it is not thermoplastic, so that the damage of the incinerator becomes larger when incinerated, or that it takes money to remove toxic gases, etc.
Therefore, most of them are disposed of in landfills, but there are also problems in that it is difficult to stabilize the ground, so the landfill space is limited and the cost becomes high.
In addition, various problems have been pointed out: although the processability is excellent, the pollution problem of the chemicals used in the production, the residual chemicals after foaming, the accompanying odor, etc.
However, the polyester-based network structure tends to become brittle when heated at high temperature or remelted, so there are problems in thermoforming processability and recyclability.

Method used

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  • Network structure excellent in hydrolysis resistance and production method thereof
  • Network structure excellent in hydrolysis resistance and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] On the effective surface of the nozzle with a width of 1120 mm in the width direction and a width of 64 mm in the thickness direction, the orifice has an outer diameter of 5.0 mm, an inner diameter of 4.4 mm, and an orifice of a hollow formative cross-section forming a three-bridge with an inter-hole spacing of 8 mm. The nozzles arranged by the Chidori, so that the obtained polyester thermoplastic elastomer A-1 is discharged to the bottom of the nozzle at a rate of 3.2 g / min at a rate of 3.2 g / min at a melting temperature of 245 ° C. The screw speed is 70 rpm, and the Q / N is 48.7cm 3 / rev, the passage time in the pipe is 1 minute, the cooling water is placed 30cm below the nozzle surface, and the stainless steel ring net with a width of 150cm is arranged in parallel with an opening width of 50mm so that a pair of traction conveyor belts are partially exposed on the water surface. , on the conveying net on the water surface, make the discharge line in the molten state be...

Embodiment 2

[0088] As the polyester-based thermoplastic elastomer, A-2 was used, the spinning temperature was 240°C, the distance between the nozzle face and the cooling water was 33 cm, and the drawing speed was 2.0 m / min. The same procedure as in Example 1 was carried out. to obtain a network structure. Table 2 shows the properties of the obtained network structure containing the thermoplastic elastomer. The resulting network structure was formed into a triangular onigiri-shaped hollow section with a hollow rate of 38%, a linear body with a fiber diameter of 0.8 mm, and an apparent density of 0.037 g / cm 3 , the thickness of the flattened surface was 48 mm, the acid value was 24 meq / kg, and the reduced viscosity retention rate after heating and melting the network structure was maintained at a value as high as 98%.

Embodiment 3

[0090] The following nozzle is used: on the effective surface of the nozzle with a width of 600 mm in the width direction and a width of 60 mm in the thickness direction, the shape of the orifice is formed into a houndstooth arrangement of circular cross-sections with an outer diameter of 1.0 mm and an inter-hole pitch of 5 mm, as Polyester-based thermoplastic elastomer, using A-2, set the spinning temperature to 240°C, single-hole output to 1.3g / min, Q / N to 25.0cm 3 / rev, the passage time in the pipe was 21 minutes, the nozzle surface-cooling water distance was 26 cm, and the pulling speed was 1.4 m / min, a network structure was obtained in the same manner as in Example 1. Table 2 shows the properties of the obtained network structure containing the thermoplastic elastomer. For the obtained network structure, a linear body with a circular cross section and a fiber diameter of 0.5 mm is formed, and the apparent density is 0.050 g / cm 3 , the thickness of the flattened surface i...

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Abstract

The object of the present invention is to provide a network structure excellent in hydrolysis resistance and a method for producing the same, which are achieved by a network structure having a three-dimensional random ring joint structure composed of continuous linear bodies body, the continuous linear body includes a polyester thermoplastic elastomer, and the fiber diameter is not less than 0.1 mm and not more than 3.0 mm, and the apparent density of the network structure is 0.005 g / cm 3 More than 0.20g / cm 3 Below, the acid value is 32meq / kg or less.

Description

technical field [0001] The present invention relates to: bedding such as office chairs, furniture, sofas, and beds, seats for vehicles such as trains, automobiles, two-wheeled vehicles, baby carriages, child seats, and car chairs, floor mats, components for preventing collisions, and sandwiching components, etc. A network structure of cushioning materials used in shock-absorbing pads and the like. Background technique [0002] Currently, foamed-crosslinked urethanes are widely used as cushioning materials for furniture, bedding such as beds, and vehicle seats such as trains, automobiles, and motorcycles. [0003] Foamed-crosslinked urethane has good durability as a cushioning material, but has problems in that it is poor in moisture and water permeability and air permeability, and has heat storage properties, so it tends to be stuffy. Furthermore, it has been pointed out that since it is not thermoplastic, it is difficult to recycle, the damage of the incinerator becomes la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H3/037A47C27/12B68G3/00D04H3/011D04H3/16
CPCA47C27/12B68G3/00D04H3/011D04H3/037D04H3/16
Inventor 涌井洋行小渊信一
Owner TOYOBO MC CORP