US4438172A
Expired / Lapsed
US
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Heat retaining sheet
Assignee: Toray Industries Inc
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Filing: 1981-05-27
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Granted: 1984-03-20
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Expires: 2001-05-27
Abstract
Abstract This invention relates to a heat retaining sheet comprising at least a web in which fibers containing polybutylene terephthalate as at least one of their components and having a substantially undrawn definite fiber length are mutually bonded, and which has small area shrinkage in boiling water. The present invention provides a heat retaining web which is particularly useful as the heat retaining material for batting or interlining for clothing, gloves, hats, bedclothes and so forth.
Inventors
- 👤 Ando Katsutoshi
- 👤 Nishiura Eiichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:08
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; A; A41; A41D; A41D31/00; A41D31/04; A41D31/18; A41D31/185; B32B5/02; B32B5/022; B32B5/024; B32B7/00; B32B7/04; B32B7/12; D; D04; D04H; D04H1/00; D04H1/40; D04H1/54; D04H1/56; B32B2262/00; B32B2262/02; B32B2262/0276; B32B2262/0284; B32B2307/00; B32B2307/30; B32B2307/304; B32B2307/306; B32B2307/3065; B32B2307/70; B32B2307/72; B32B2437/00; B32B2437/02; B32B2437/04; B32B2535/00; B32B2597/00; B32B2605/00; B32B2605/003; B32B2605/18; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24826; Y10T428/249921; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/31504; Y10T428/31786; Y10T442/00; Y10T442/30; Y10T442/3707; Y10T442/378; Y10T442/60; Y10T442/608; Y10T442/614; Y10T442/621
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
62 words
A heat retaining sheet comprising a web formed by mutually bonding fibers containing polybutylene terephthalate, said fibers having a definite fiber length, being substantially undrawn and substantially uncrimped and having an average fineness of up to about 15 denier and a fineness distribution ranging from 0.001 to 40 denier, said web having area shrinkage in boiling weter of up to about 20%.
Claim 2
Dependent Claim
62 words
A heat retaining sheet comprising a web formed by mutually bonding fibers containing polybutylene terephthalate, said fibers having a definite fiber length, being substantially undrawn and substantially uncrimped and having an average fineness of up to about 15 denier and a fineness distribution ranging from 0.001 to 40 denier, said web having area shrinkage in boiling weter of up to about 20%.
Claim 3
Dependent Claim
17 words
The heat retaining sheet as defined in claim 1 wherein said fibers consist essentially of polybutylene terephthalate.
Claim 4
Dependent Claim
18 words
The heat retaining sheet as defined in claim 1 wherein said fibers consist essentially of copolymeric polybutylene terephthalate.
Claim 5
Dependent Claim
24 words
The heat retaining sheet as defined in claim 1 wherein said web has an apparent density of up to about 0.1 g/cm 3 .
Claim 6
Dependent Claim
22 words
The heat retaining sheet as defined in claim 1 wherein said webs have a thermal insulation value of at least 1.8 clo/cm.
Claim 7
Dependent Claim
27 words
The heat retaining sheet as defined in claim 1 wherein said fibers having a definite fiber length have an average fineness of up to about 0.5 deniers.
Claim 8
Dependent Claim
69 words
The heat retaining sheet as defined in claim 1, comprising at least a web in which fibers having an average size of up to about 0.5 deniers are mutually bonded and which has area shrinkage by boiling water of up to about 20% and an apparent density of up to about 0.1 g/cm 3 , said heat retaining sheet having a thermal insulation value of at least 1.8 clo/cm.
Claim 9
Dependent Claim
35 words
The heat retaining sheet as defined in claim 6 wherein said fibers having a definite fiber length have an average fineness of 0.03 to 0.5 deniers and a fineness distribution of 0.01 to 1 denier.
Claim 10
Dependent Claim
25 words
The heat retaining sheet as defined in claim 1 wherein said fibers having a definite fiber length have mutually different average fineness and fineness distributions.
Claim 11
Dependent Claim
23 words
The heat retaining sheet as defined in claim 4 wherein said web has an apparent density of 0.01 to 0.1 g/cm 3 .
Claim 12
Dependent Claim
28 words
The heat retaining sheet as defined in claim 1 wherein at least one another web is layered on, and integrated with, one or both surfaces of said web.
Claim 13
Dependent Claim
17 words
The heat retaining sheet as defined in claim 11 wherein said layered web is other non-woven fabrics.
Claim 14
Dependent Claim
16 words
The heat retaining sheet as defined in claim 11 wherein said layered web is woven fabric.
Claim 15
Dependent Claim
16 words
The heat retaining sheet as defined in claim 11 wherein said layered web is flame-retarding web.
Claim 16
Dependent Claim
18 words
The heat retaining sheet as defined in claim 1 wherein said web is 0.5 to 30 mm thick.
Claim 17
Dependent Claim
19 words
The heat retaining sheet as defined in claim 11 wherein said other web is 0.05 to 1 mm thick.
Claim 18
Dependent Claim
33 words
The heat retaining sheet as defined in claim 3 wherein said copolymer component is at least one member selected from the group consisting of isophthalic acid, adipic acid, sebacic acid and phthalic acid.
Claim 19
Dependent Claim
34 words
The heat retaining sheet as defined in claim 1 wherein said fibers having a definite fiber length are an elastomer consisting of a polyether ester type copolymer having butylene terephthalate as the hard segment.
Claim 20
Dependent Claim
52 words
The heat retaining sheet as defined in claim 18 wherein said fibers having a definite fiber length are an elastomer consisting of terephthalic acid, 1,4-butanediol, a dicarboxylic acid other than terephthalic acid and/or a low-molecular diol other than 1,4-butanediol and poly(alkylene oxide)glycol having a number-average molecular weight of about 300 to 6,000.
Claim 21
Dependent Claim
35 words
The heat retaining sheet as defined in claim 19 wherein said dicarboxylic acid other than terephthalic acid is one member selected from the group consisting of isophthalic acid, phthalic acid, adipic acid and sebacic acid.
Claim 22
Dependent Claim
31 words
The heat retaining sheet as defined in claim 19 wherein said diol other than 1,4-butanediol is one member selected from the group consisting of ethylene glycol, trimethylene glycol and pentamethylene glycol.
Claim 23
Dependent Claim
31 words
The heat retaining sheet as defined in claim 21 wherein said poly(alkylene oxide)glycol is one member selected from the group consisting of polyethylene glycol, poly(tetramethylene oxide)glycol, poly(1,2-propylene oxide)glycol and poly(1,3-propylene oxide)glycol.
Claim 24
Dependent Claim
27 words
The heat retaining sheet as defined in claim 18 wherein said fibers having a definite fiber length have an average fineness of up to about 20 deniers.
Claim 25
Dependent Claim
35 words
The heat retaining sheet as defined in claim 23 wherein said fibers having a definite fiber length have an average fineness of up to 15 deniers and a fineness distribution of 0.01 to 20 deniers.
Claim 26
Dependent Claim
27 words
The heat retaining sheet as defined in claim 24 wherein said fibers having a definite fiber length have mutually different average fineness and mutually different fineness distributions.
Claim 27
Dependent Claim
25 words
The heat retaining sheet as defined in claim 18 wherein said web has a strength recovery ratio of at least 50% when stretched by 20%.
Claim 28
Dependent Claim
24 words
The heat retaining sheet as defined in claim 26 wherein said web has an apparent density of up to about 0.1 g/cm 3 .
Claim 29
Dependent Claim
22 words
The heat retaining sheet as defined in claim 27 wherein said web has a thermal insulation value of at least 1.5 clo/cm.
Claim 30
Dependent Claim
96 words
An elastic heat retaining sheet comprising a non-woven web formed from thin fiber layers laminated together, wherein said thin fiber layers comprise mutually bonded elastic fibers layered sufficiently independent and separate with respect to one another, wherein said elastic fibers consist essentially of an elastomer of a polyether ester type copolymer containing butylene terephthalate as the hard segment and have an average fineness up to about 15 denier and a fineness distribution of 0.01 to 20 denier and wherein said elastic heat retaining sheet has a stretch recovery ratio of at least 50% when stretched 20%.
Claim 31
Dependent Claim
96 words
An elastic heat retaining sheet comprising a non-woven web formed from thin fiber layers laminated together, wherein said thin fiber layers comprise mutually bonded elastic fibers layered sufficiently independent and separate with respect to one another, wherein said elastic fibers consist essentially of an elastomer of a polyether ester type copolymer containing butylene terephthalate as the hard segment and have an average fineness up to about 15 denier and a fineness distribution of 0.01 to 20 denier and wherein said elastic heat retaining sheet has a stretch recovery ratio of at least 50% when stretched 20%.
Claim 32
Dependent Claim
30 words
The elastic heat retaining web as defined in claim 29 wherein an apparent density is up to 0.1 g/cm 3 and a thermal insulation value is at least 1.5 clo/cm.
Claim 33
Dependent Claim
35 words
A heat retaining sheet as defined in claim 7 wherein said fibers having a definite fiber length have an average fineness of 0.03 to 0.5 denier and a fineness distribution of 0.01 to 1 denier.
Claim 34
Dependent Claim
23 words
The heat retaining sheet as defined in claim 7 wherein said web has an apparent density of 0.01 to 0.1 g/cm 3 .
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-03-20 | 1987-09-19 | 1988-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-03-20 | 1991-09-19 | 1992-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-03-20 | 1995-09-19 | 1996-03-20 | $7700.00 | Window Closed / Lapsed |