Patent · US9586390B2 · B2 · US

Prepreg tape slitting method and apparatus

(11) Publication number

US9586390B2

(21) Application number

15/062,253

(22) Filing date

2016-03-07

(30) Priority date

2012-09-26

(43) Publication date

2017-03-07

(45) Date of grant

2017-03-07

(52) CPC

B32B Layered products, i.e. products built-up of strata of flat or non-flat, e.g. cellular or honeycomb, form: 38/0004, 2250/02, 2250/24, 2260/023, 2260/046, 2262/101, 2305/076, 2307/54, 2323/00, 2605/18, 27/08, 27/12, 27/30, 27/306, 27/32, 27/34, 27/36, 3/08, 37/203, 38/10, 5/02
B26D Cutting; details common to machines for perforating, punching, cutting-out, stamping-out or severing: 2210/00, 7/088
B65H Handling thin or filamentary material, e.g. sheets, webs, cables: 18/103, 2301/4148, 2701/11332, 35/02
Y10T Technical subjects covered by former us classification: 156/1705, 428/269, 428/31725, 428/31786, 428/31935, 428/31938

(73) Assignee

WEB IND INC

(54) Title

Prepreg tape slitting method and apparatus

(57) Abstract

Improved methods and apparatus are provided for the production of prepreg slit tape wherein master rolls of prepreg sheet are formed which are capable of being slit, with liner attached, at high precision.

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Claims (21)

A method for the production of slit tape from a master roll of a continuous sheet of prepreg material comprising: a) unwinding the master roll of prepreg material; b) feeding the continuous sheet of prepreg material with a liner overlaying and attached to at least one surface of the continuous sheet into and through a slitter, thereby simultaneously slitting the prepreg sheet and liner, and c) winding the so formed slit tape, with liner attached; wherein the liner is a polymer film which 1) has a thickness of 0.1 to about 12 mils, a lengthwise tensile strength of 500 psi to 40,000 psi, and a transverse tensile strength of 500 psi to 30,000 psi, 2) resists elongation and/or the creation of stress fractures in the film under the stress of winding, and 3) manifests a sufficient adhesive or peel strength with the prepreg material so as avoid separating from the prepreg material under the stresses of the unwinding, slitting and winding processes.
The method of claim 1 wherein the polymer film is able to be slit by the slitter without tearing, without the formation of fibrils, and without separating from the prepreg material.
The method of claim 1 wherein the polymer film has an arithmetic average surface roughness of 0.01 to 200 um.
The method of claim 1 wherein the polymer film has an arithmetic average surface roughness of 0.01 to 150 um.
The method of claim 1 wherein the polymer film has an arithmetic average surface roughness of 0.1 to 100 um.
The method of claim 1 wherein the polymer film has a coefficient of friction of 0.1 to 0.9.
The method of claim 1 wherein the polymer film has a thickness of about 0.5 to about 5 mils.
The method of claim 1 wherein the polymer film has a thickness of about 0.5 to about 2.5 mils.
The method of claim 1 wherein the polymer film has a thickness of about 0.1 to about 5 mils and an arithmetic average surface roughness of 0.1 to 100 um.
The method of claim 1 wherein the polymer film has an elongation of 100˜950% whereby once yield strength is reached, the polymer film will deform and elongate to prevent or delay break.
The method of claim 1 wherein the liner is composed of a polyamide, polyester, vinyl polymer, or polyacetate material that is compatible with the matrix resin of the prepreg material.
The method of claim 1 wherein the polymer film is a polyolefin other than low density polyethylene.
The method of claim 1 wherein the master roll comprises the prepreg sheet material with a paper or polymer film backing attached and the method further comprises the step of removing the backing and replacing the backing with the liner while it is being unwound from the master roll and prior to being fed to the slitter.
The method of claim 1 wherein the polymer film has a surface energy on one side that is different from the surface energy on the other.
An improved method for the production of slit tape from a master roll of a continuous sheet of prepreg wherein the improvement comprises slitting the a prepreg material having a liner overlaying and attached to at least one surface of the continuous sheet of prepreg material wherein the liner is a polymer film which 1) has a thickness of 0.1 to about 12 mils, a lengthwise tensile strength of 500 psi to 40,000 psi, and a transverse tensile strength of 500 psi to 30,000 psi, 2) resists elongation and/or the creation of stress fractures in the film under the stress of winding, and 3) manifests a sufficient adhesive or peel strength with the prepreg material so as avoid separating from, the prepreg material under the stresses of the unwinding, slitting and winding processes.
The method of claim 15 wherein the polymer film has an arithmetic average surface roughness of 0.01 to 200 um.
The method of claim 15 wherein the polymer film has a coefficient of friction of 0.1 to 0.9.
The method of claim 15 wherein the polymer film has a thickness of about 0.5 to about 2.5 mils.
The method of claim 15 wherein the polymer film has an elongation of 100˜950% whereby once yield strength is reached, the polymer film will deform and elongate to prevent or delay break.
The method of claim 15 wherein the liner is composed of a polyamide, polyester, vinyl polymer, or polyacetate material that is compatible with the matrix resin of the prepreg material.
The method of claim 15 wherein the polymer film is a polyolefin other than low density polyethylene.

Citations (45)

JP2002363514A
JPH01150658A
US2005087306A1
US2007044900A1
US2008044940A1
US2008135174A1
US2008166511A1
US2010084084A1
US2010092770A1
US2010282404A1
US2012015135A1
US2012061018A1
US2012100362A1
US2012297944A1
US2013122277A1
US2013284847A1
US2014083267A1
US2014217332A1
US2015147544A1
US2016060068A1
US2016280493A1
US2986079A
US3003911A
US3459078A
US3566726A
US3600479A
US3713931A
US3728980A
US3730821A
US3790744A
US3799824A
US3803959A
US3831828A
US3871253A
US3875837A
US4294145A
US4775583A
US5380576A
US6129964A
US6286403B1
US7182008B2
US7244337B2
US7754322B2
US7770837B1
US8206540B2

Record as JSON

{
  "publication_number": "US9586390B2",
  "country": "US",
  "kind": "B2",
  "title": "Prepreg tape slitting method and apparatus",
  "abstract": "Improved methods and apparatus are provided for the production of prepreg slit tape wherein master rolls of prepreg sheet are formed which are capable of being slit, with liner attached, at high precision.",
  "claims": [
    "1. A method for the production of slit tape from a master roll of a continuous sheet of prepreg material comprising: a) unwinding the master roll of prepreg material; b) feeding the continuous sheet of prepreg material with a liner overlaying and attached to at least one surface of the continuous sheet into and through a slitter, thereby simultaneously slitting the prepreg sheet and liner, and c) winding the so formed slit tape, with liner attached; wherein the liner is a polymer film which 1) has a thickness of 0.1 to about 12 mils, a lengthwise tensile strength of 500 psi to 40,000 psi, and a transverse tensile strength of 500 psi to 30,000 psi, 2) resists elongation and/or the creation of stress fractures in the film under the stress of winding, and 3) manifests a sufficient adhesive or peel strength with the prepreg material so as avoid separating from the prepreg material under the stresses of the unwinding, slitting and winding processes.",
    "2. The method of claim 1 wherein the polymer film is able to be slit by the slitter without tearing, without the formation of fibrils, and without separating from the prepreg material.",
    "3. The method of claim 1 wherein the polymer film has an arithmetic average surface roughness of 0.01 to 200 um.",
    "4. The method of claim 1 wherein the polymer film has an arithmetic average surface roughness of 0.01 to 150 um.",
    "5. The method of claim 1 wherein the polymer film has an arithmetic average surface roughness of 0.1 to 100 um.",
    "6. The method of claim 1 wherein the polymer film has a coefficient of friction of 0.1 to 0.9.",
    "7. The method of claim 1 wherein the polymer film has a thickness of about 0.5 to about 5 mils.",
    "8. The method of claim 1 wherein the polymer film has a thickness of about 0.5 to about 2.5 mils.",
    "9. The method of claim 1 wherein the polymer film has a thickness of about 0.1 to about 5 mils and an arithmetic average surface roughness of 0.1 to 100 um.",
    "10. The method of claim 1 wherein the polymer film has an elongation of 100˜950% whereby once yield strength is reached, the polymer film will deform and elongate to prevent or delay break.",
    "11. The method of claim 1 wherein the liner is composed of a polyamide, polyester, vinyl polymer, or polyacetate material that is compatible with the matrix resin of the prepreg material.",
    "12. The method of claim 1 wherein the polymer film is a polyolefin other than low density polyethylene.",
    "13. The method of claim 1 wherein the master roll comprises the prepreg sheet material with a paper or polymer film backing attached and the method further comprises the step of removing the backing and replacing the backing with the liner while it is being unwound from the master roll and prior to being fed to the slitter.",
    "14. The method of claim 1 wherein the polymer film has a surface energy on one side that is different from the surface energy on the other.",
    "15. An improved method for the production of slit tape from a master roll of a continuous sheet of prepreg wherein the improvement comprises slitting the a prepreg material having a liner overlaying and attached to at least one surface of the continuous sheet of prepreg material wherein the liner is a polymer film which 1) has a thickness of 0.1 to about 12 mils, a lengthwise tensile strength of 500 psi to 40,000 psi, and a transverse tensile strength of 500 psi to 30,000 psi, 2) resists elongation and/or the creation of stress fractures in the film under the stress of winding, and 3) manifests a sufficient adhesive or peel strength with the prepreg material so as avoid separating from, the prepreg material under the stresses of the unwinding, slitting and winding processes.",
    "16. The method of claim 15 wherein the polymer film has an arithmetic average surface roughness of 0.01 to 200 um.",
    "17. The method of claim 15 wherein the polymer film has a coefficient of friction of 0.1 to 0.9.",
    "18. The method of claim 15 wherein the polymer film has a thickness of about 0.5 to about 2.5 mils.",
    "19. The method of claim 15 wherein the polymer film has an elongation of 100˜950% whereby once yield strength is reached, the polymer film will deform and elongate to prevent or delay break.",
    "20. The method of claim 15 wherein the liner is composed of a polyamide, polyester, vinyl polymer, or polyacetate material that is compatible with the matrix resin of the prepreg material.",
    "21. The method of claim 15 wherein the polymer film is a polyolefin other than low density polyethylene."
  ],
  "cpc": [
    "B32B 38/0004",
    "B26D 2210/00",
    "B26D 7/088",
    "B32B 2250/02",
    "B32B 2250/24",
    "B32B 2260/023",
    "B32B 2260/046",
    "B32B 2262/101",
    "B32B 2305/076",
    "B32B 2307/54",
    "B32B 2323/00",
    "B32B 2605/18",
    "B32B 27/08",
    "B32B 27/12",
    "B32B 27/30",
    "B32B 27/306",
    "B32B 27/32",
    "B32B 27/34",
    "B32B 27/36",
    "B32B 3/08",
    "B32B 37/203",
    "B32B 38/10",
    "B32B 5/02",
    "B65H 18/103",
    "B65H 2301/4148",
    "B65H 2701/11332",
    "B65H 35/02",
    "Y10T 156/1705",
    "Y10T 428/269",
    "Y10T 428/31725",
    "Y10T 428/31786",
    "Y10T 428/31935",
    "Y10T 428/31938"
  ],
  "assignees": [
    "WEB IND INC"
  ],
  "filing_date": "2016-03-07",
  "publication_date": "2017-03-07",
  "grant_date": "2017-03-07",
  "priority_date": "2012-09-26",
  "application_number": "US-201615062253-A",
  "family_id": "50339150",
  "citations": [
    "JP2002363514A",
    "JPH01150658A",
    "US2005087306A1",
    "US2007044900A1",
    "US2008044940A1",
    "US2008135174A1",
    "US2008166511A1",
    "US2010084084A1",
    "US2010092770A1",
    "US2010282404A1",
    "US2012015135A1",
    "US2012061018A1",
    "US2012100362A1",
    "US2012297944A1",
    "US2013122277A1",
    "US2013284847A1",
    "US2014083267A1",
    "US2014217332A1",
    "US2015147544A1",
    "US2016060068A1",
    "US2016280493A1",
    "US2986079A",
    "US3003911A",
    "US3459078A",
    "US3566726A",
    "US3600479A",
    "US3713931A",
    "US3728980A",
    "US3730821A",
    "US3790744A",
    "US3799824A",
    "US3803959A",
    "US3831828A",
    "US3871253A",
    "US3875837A",
    "US4294145A",
    "US4775583A",
    "US5380576A",
    "US6129964A",
    "US6286403B1",
    "US7182008B2",
    "US7244337B2",
    "US7754322B2",
    "US7770837B1",
    "US8206540B2"
  ]
}

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