# US 9,040,631 B1 · Padding

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- Number: US 9,040,631 B1
- Document ID: US9040631B1
- Status: Granted
- Kind: B1
- Application number: 14/117,242
- Filed: 2012-06-29
- Published: 2015-05-14
- Granted: 2015-05-26
- Earliest claimed: 2011-06-30
- Assignees: Toyobo Co., Ltd.; Japan Exlan Company Limited
- Applicants: Atsushi Kato; Naoki Kawanaka; Masao Ieno
- Inventors: Atsushi Kato; Naoki Kawanaka; Masao Ieno
- Web page: https://patentgrep.com/patent/US9040631B1

## CPC

- A47C 27/12: with fibrous inlays, e.g. made of wool, of cotton
- A47G 9/02: Bed linen; Blankets; Counterpanes
- B68G 11/02: mainly composed of fibrous materials
- C08L 33/08: Homopolymers or copolymers of acrylic acid esters
- C08L 67/00: Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain (of polyester-amides C08L77/12; of polyester-imides C08L79/08); Compositions of derivatives of such polymers
- A41D 31/12: Hygroscopic; Water retaining
- A41D 31/18: Elastic
- A41D 2400/10: Heat retention or warming
- A47C: CHAIRS; SOFAS; BEDS
- A47G: HOUSEHOLD OR TABLE EQUIPMENT (book-ends A47B5/00; knives B26B)
- B68G: METHODS, EQUIPMENT, OR MACHINES FOR USE IN UPHOLSTERING; UPHOLSTERY NOT OTHERWISE PROVIDED FOR
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)
- A41D: OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES

## Abstract

The present invention provides padding which is suitable as bedding and clothing items having both exothermic property upon moisture absorption and bulkiness in high levels and being able to give comfortable environment to human body. The present invention relates to a padding containing 25 to 85% by weight of polyester fiber, characterized in that the padding contains 15 to 75% by weight of a cross-linked polyacrylate fiber of a magnesium salt type and/or a calcium salt type.

## Claims

### Claim 1

A padding containing 25 to 85% by weight of polyester fiber, characterized in that the padding contains 15 to 75% by weight of a cross-linked polyacrylate fiber of a magnesium salt type and/or a calcium salt type and that weight-average single fiber elastic modulus of the fibers used in the padding is 25 cN/dtex or more.

### Claim 2 (depends on 1)

The padding according to claim 1, wherein single fiber elastic modulus of the polyester fiber is 28 cN/dtex or more.

### Claim 3 (depends on 1)

The padding according to claim 1, wherein single fiber elastic modulus of the cross-linked polyacrylate fiber of a magnesium salt type and/or a calcium salt type is 20 cN/dtex or more.

### Claim 4 (depends on 1)

The padding according to claim 1, wherein specific volume thereof is 50 to 100 cm3/g.

### Claim 5 (depends on 1)

The padding according to claim 1, wherein coefficient of moisture absorption thereof is 6.0 to 40%.

### Claim 6 (depends on 1)

The padding according to claim 1, wherein in-bed temperature and in-bed humidity measured after 30 minutes from the start of perspiration after 10 minutes under the condition of 15° C. and 50% RH are 32° C. or higher and 70% or lower, respectively.