Dust-proof fabric

{
  "publication_number": "US4582747A",
  "country": "US",
  "kind": "A",
  "title": "Dust-proof fabric",
  "abstract": "A dust-proof fabric having an excellent dust-collecting efficiency and dust-preventing property including a plurality of filament yarns having a thickness of 20 to 400 denier and consisting of a plurality of individual filaments having a denier of 3.5 or less. The fabric has a number of pores formed therein and exhibits an air permeability of 0.3 to 10 ml/cm 2 /sec. In the fabric, the proportion of the integrated volume of pores having a size of 43 μm or more to the entire integrated volume of all the pores in the fabric is 40% or less.",
  "claims": [
    "1. A dust-proof fabric comprising a plurality of filament yarns having a denier of from 20 to 400 and consisting of a plurality of individual filaments having a denier of 3.5 or less, which fabric has a number of pores formed therein and exhibits an air permeability of from 0.3 to 10 ml/cm 2 /sec and, in which fabric, the integrated volume proportion of the pores having a size of 43 μm or more corresponds to 40% or less of the entire integrated volume of all the pores.",
    "2. The dust-proof fabric as claimed in claim 1, wherein the integrated volume proportion of the pores having a size of 43 μm or more is 25% or less based on the entire integrated volume of all the pores.",
    "3. The dust-proof fabric as claimed in claim 1, wherein the integrated volume proportion of the pores having a size of from 0.1 μm to 10 μm corresponds to 28% or more of the entire integrated volume of all the pores.",
    "4. The dust-proof fabric as claimed in claim 3, wherein the integrated volume proportion of the pores having a size of from 0.1 μm to 10 μm corresponds to 40% or more of the entire integrated volume of all the pores.",
    "5. The dust-proof fabric as claimed in claim 1, which is in the form of a woven fabric composed of a plurality of warps and wefts consisting of the filament yarns.",
    "6. The dust-proof fabric as claimed in claim 5, wherein the warps and/or wefts contain electrically conductive filament yarns having an electric resistivity of 10 10 Ω/cm or less and arranged at intervals of from 3 mm to 50 mm.",
    "7. The dust-proof fabric as claimed in claim 1, which fabric has a thickness of from 0.05 mm to 0.40 mm.",
    "8. The dust-proof fabric as claimed in claim 1 or 5, wherein the denier of the individual filaments is 1.5 or less.",
    "9. The dust-proof fabric as claimed in claim 8, wherein the denier of the individual filaments is 0.5 or less.",
    "10. The dust-proof fabric as claimed in claim 1, wherein the individual filaments are selected from the group consisting of polyester filaments, polyamide filaments, polyaramide filaments, polyolefin filaments, polyvinyl polymer filaments, rayon filaments, cellulose acetate filaments, silk filaments, and glass filaments.",
    "11. The dust-proof fabric as claimed in claim 9, wherein the individual filaments having a denier of 0.5 or less are ones prepared from peel-separating composite filaments composed of a polyester filamentary constituent and a polyamide filamentary constituent connected to each other by peel-separating the polyester and polyamide filamentary constituents from each other.",
    "12. The dust-proof fabric as claimed in claim 1, wherein at least a portion of the filament yarns comprises bulky multifilament yarns."
  ],
  "description_excerpt": "1. Field of the Invention\n\nThe present invention relates to a dust-proof fabric. More particularly, the present invention relates to a dust-proof fabric useful for preparing dust-proof clothing to be used in clean rooms, for example, industrial clean rooms, biological clean rooms and surgical operation rooms, which are effective for preventing contamination of the human body or specific articles with dust generated from machines and human personnel.\n\nThe dust-proof fabric of the present invention generates dusts therefrom in a very reduced amount and can collect dust at a high efficiency. Also, the dust-proof fabric of the present invention exhibits an antistatic property which prevents excess attraction of dust and prevents breakdowns of semiconductor devices.\n\n2. Description of the Related Art\n\nIt is known that to prevent undesirable generation of dust from clothing of workers or operators in industrial clean rooms and other clean rooms by use of dust-free clothing (inclusive of sterile clothing). The dust-free clothing is produced from woven or knitted fabrics consisting of synthetic filament yarns or nonwoven fabrics consisting of spun bonded continuous filaments. Also, it is known to prevent undesirable adhesion of dust on the dust-free clothing by antistatic treatment applied to the dust-free clothing.\n\nWith recent increase of precision, integration, and miniaturization in the semiconductor industry and precision machine industry and in the fields of the bioindustry and medical industry, clean rooms have come into broad use.",
  "cpc": [
    "D03D 1/0023",
    "D03D 15/00",
    "D03D 15/267",
    "D03D 15/275",
    "D03D 15/283",
    "D03D 15/41",
    "D10B 2101/06",
    "D10B 2201/24",
    "D10B 2201/28",
    "D10B 2211/04",
    "D10B 2321/02",
    "D10B 2331/021",
    "D10B 2331/04",
    "D10B 2401/10",
    "D10B 2401/16",
    "Y10S 428/922",
    "Y10S 55/43",
    "Y10S 55/45",
    "Y10T 428/249978",
    "Y10T 428/249979",
    "Y10T 428/249986",
    "Y10T 428/2931",
    "Y10T 428/298",
    "Y10T 442/3065",
    "Y10T 442/3106",
    "Y10T 442/313",
    "Y10T 442/3976",
    "Y10T 442/425",
    "Y10T 442/431",
    "Y10T 442/438"
  ],
  "ipc": [
    "D03D 15/00"
  ],
  "assignees": [
    "Teijin Ltd"
  ],
  "inventors": [
    "Tadashi Hirakawa",
    "Mamoru Tsumoto"
  ],
  "filing_date": "1985-02-14",
  "publication_date": "1986-04-15",
  "grant_date": "1986-04-15",
  "priority_date": "1984-02-16",
  "application_number": "US-70155785-A",
  "family_id": "26363873",
  "cited_by_count": 39,
  "citations": [
    "US3986530A",
    "US4025679A",
    "US4520066A",
    "US4547423A",
    "US4539255A",
    "JPS60104548A",
    "US4540625A",
    "US4499139A"
  ]
}