KR101627996B1 - Method for manufacturing meltblown fiber pad - Google Patents

Method for manufacturing meltblown fiber pad Download PDF

Info

Publication number
KR101627996B1
KR101627996B1 KR1020160020598A KR20160020598A KR101627996B1 KR 101627996 B1 KR101627996 B1 KR 101627996B1 KR 1020160020598 A KR1020160020598 A KR 1020160020598A KR 20160020598 A KR20160020598 A KR 20160020598A KR 101627996 B1 KR101627996 B1 KR 101627996B1
Authority
KR
South Korea
Prior art keywords
meltblown
fabric
cutting
meltblown fiber
fiber
Prior art date
Application number
KR1020160020598A
Other languages
Korean (ko)
Inventor
김중백
김중훈
Original Assignee
김중백
김중훈
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김중백, 김중훈 filed Critical 김중백
Priority to KR1020160020598A priority Critical patent/KR101627996B1/en
Application granted granted Critical
Publication of KR101627996B1 publication Critical patent/KR101627996B1/en
Priority to PCT/KR2017/001914 priority patent/WO2017146446A1/en

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
    • D04H1/4282—Addition polymers
    • D04H1/4291—Olefin series
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
    • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
    • D04H1/49—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation entanglement by fluid jet in combination with another consolidation means
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D04H1/544—Olefin series
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H5/00—Seaming textile materials
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
    • D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
    • D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2501/00—Wearing apparel
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/04—Filters

Abstract

The present invention relates to a method for producing a meltblown fiber pad by processing a meltblown fiber fabric covered with a cover on the outside of a polypropylene fiber web, wherein the meltblown fiber fabric is passed through a die cutting press to cut and bond Wherein the die cutting press comprises a blade member provided with at least one dull blade at the inner side of the cutting blade and a heating element connected to the blade member, Wherein the knife member having a temperature of from about < RTI ID = 0.0 > 150 C < / RTI > to about < RTI ID = 0.0 > 170 C < / RTI > presses the meltblown fabric at the same time.
According to the present invention, cutting and joining are simultaneously performed at the time of processing the meltblown fiber fabric, thereby achieving process automation and work efficiency, simplifying the process, reducing the manufacturing cost, and preventing the product from being damaged. So that it can be exercised.

Description

METHOD FOR MANUFACTURING MELTBLOWN FIBER PAD BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

More particularly, the present invention relates to a method for manufacturing a meltblown fiber pad, and more particularly, to a process for manufacturing a meltblown fiber fabric covering a polypropylene fiber web with cutting and joining simultaneously, To a method of making a meltblown fiber pad.

Generally, a polypropylene fiber web is produced by stretching filaments in such a manner that a thermoplastic resin, polypropylene, is injected vertically downward into a filament to collide a high-temperature and high-speed gas having a constant temperature, pressure and speed with filaments, And collecting and laminating the filaments formed with the wafers to form a fibrous web.

The polypropylene fiber web produced by the meltblown method is safer and more environmentally friendly than glass fiber or goose down. It can be easily cut and used according to the purpose, and is not only recyclable but also has a very small diameter and a surface area Because it is very large, it is widely used for various high performance filters, wipers, oil adsorbents, sound absorbing materials, heat insulating materials, and interior padding for clothes.

However, the polypropylene fiber web is weak in the strength of the microfibers constituting the fiber web and the fine fiber-to-fiber cohesion, and therefore, when the fiber web is used without being subjected to a separate processing step, the aggregation of the absorbing web is easily broken, Is used.

For example, in the prior art, a polypropylene fiber web is cut and then bonded or stitched with an adhesive, or a high frequency processor is used to join arbitrary portions to each other to strengthen the strength of the fibrous web and the cohesion strength between the fine fibers .

However, the above-mentioned prior art has a problem in that the process is complicated, the manufacturing cost is high, and the polypropylene fiber web is damaged or the thickness is thinned during the fabrication process and the function is deteriorated.

Disclosure of Invention Technical Problem [8] The present invention has been devised to solve all the problems described above, and it is an object of the present invention to provide a process for producing a meltblown fiber fabric which is capable of achieving process automation and work efficiency by simplifying cutting and joining processes, And to provide a method of manufacturing a meltblown fiber pad that can prevent damage to a product and thereby exhibit its original function.

In order to solve the above problems, the present invention provides a method for manufacturing a meltblown fiber pad by processing a meltblown fiber cloth covered with a cover on the outside of a polypropylene fiber web, the meltblown fiber fabric being passed through a die cutting press Wherein the die cutting press comprises a blade member provided with at least one dull blade on the inner side of the cutting blade and a heating element connected to the blade member, And the blade member having a temperature of 160 to 170 占 폚 is pressed and pressed against the meltblown fabric at the same time, thereby cutting and joining the meltblown fiber pads.

Further, as a previous step of the cutting and joining step, a fabric preparation step of covering a polypropylene fiber web with a cover to prepare a meltblown fiber fabric; An unwinding step of loosening the meltblown fabric wound around the supply roll; A softening step of softening the unwoven meltblown fabric at a temperature of 120 ° C to 150 ° C with hot air through a heating means; And stabilizing the softened meltblown fabric at a temperature of less than 120 < 0 > C.

In addition, it may further include a take-out step of separating and taking out the processed meltblown fiber pads at a later stage of the cutting and joining step.

In addition, the meltblown fiber pads processed by the cutting and joining step may be provided with one or more bonding lines formed by alternately forming the cut-out portion and the bonding portion on the edge.

According to the present invention, cutting and joining are simultaneously performed in the processing of the meltblown fiber fabric, thereby achieving process automation and work efficiency, simplifying the process, reducing the manufacturing cost, and preventing the product from being damaged. So that it can be exercised.

1 is a flowchart showing a method of manufacturing a meltblown fiber pad according to an embodiment of the present invention.
FIG. 2 is a schematic view showing a manufacturing process of a meltblown fiber pad according to an embodiment of the present invention.
3A to 3C are photographs of a meltblown fiber pad manufactured by a manufacturing method according to an embodiment of the present invention.
FIG. 4 is a detailed view showing in detail the portion "A" in FIG. 3B of FIG.

Hereinafter, with reference to the drawings, specific details for carrying out a method of producing a meltblown fiber pad according to the present invention will be described in detail with reference to examples.

The method of manufacturing a meltblown fiber pad according to the present invention is characterized in that cutting and joining are performed simultaneously in processing a meltblown fiber fabric (F) in which a cover (C) is covered with a polypropylene fiber web (W) As shown in the flow chart of FIG. 1, the raw material preparation step S10, the unwinding step S20, the softening step S30, the stabilization step S40, the cutting and joining step S50, Step S60.

The fabric preparation step S10 is a step of covering the polypropylene fiber web W with a cover C to prepare a meltblown fiber fabric F. That is, the outer surface of the polypropylene fiber web (W) in which the filaments having the waved structure are laminated by melting, extruding, and spinning the polypropylene, colliding with the gas at high temperature and high speed simultaneously with the spinning, A meltblown textile fabric (F) is prepared and mounted on a supply roll (10).

As described above, since the outer surface of the polypropylene fiber web W is covered with the polyethylene cover C, the fiber properties of the polypropylene are not impaired and the original function can be exhibited.

At this time, the method of producing the polypropylene fiber web is a well-known general technique and thus will be obvious to those skilled in the art, and a detailed description thereof will be omitted.

The unwinding step S20 is a step of automatically unwinding the meltblown fiber cloth F wound on the supply roll 10 and transferring the meltblown fiber fabric F to a subsequent process through the transport rollers R. [

The softening step S30 is a step of blowing hot air through the heating means H to soften the meltblown fiber fabric F fed to the subsequent process at a temperature of 120 to 150 캜.

As described above, when the meltblown fiber fabric F is softened beforehand at a temperature of 120 ° C or more at which the polypropylene fiber web is softened, the polypropylene The fiber characteristics can be prevented from being damaged.

The stabilization step (S40) is a process for stabilizing the softened meltblown fiber fabric (F) at a temperature lower than 120 deg.

The cutting and joining step (S50) is a step of passing the meltblown fiber fabric (F) through a die cutting press (30) and cutting and joining the knitted fabric so as to have a certain pattern.

2, the die cutting press 30 includes a blade member 31 having at least one blunt blade 31b disposed inside a cutting blade 31a for cutting a raw material, A heat generating body 32 connected to the power source and generating heat according to the power application to transmit the heat to the blade member 31 and a plywood 33 for supporting the blade member 31 and the heating body 32, .

The heating element 32 is supplied with power and a current of 950 W is applied to a 220 volts voltage so that the temperature of the blade member 31 is maintained at a temperature of 160 ° C. to 170 ° C. to melt- For 3 seconds, so that heat is transferred from the blade member 31 to the polypropylene fiber web W, so that cutting and joining are simultaneously performed.

The heating element 32 is preferably made of a resistance wire formed by sintering iron, chromium, or molybdenum silicide.

If the temperature of the blade member 31 is less than 160 캜, the melting performance of the blade member 31 may be somewhat lower than the melting point of the polypropylene. If the temperature exceeds 170 캜, the polypropylene fiber web W may be damaged, The temperature of the blade member 31 is preferably 160 ° C. to 170 ° C. and no residue is left on the blade 33 because the residue on the line L may remain and the plywood 33 may be pyrolyzed. I will not.

3A to 3C, the meltblown fiber pads P processed and joined by the cutting and joining step S50 are alternately repeated along the edge portions with the cutouts L1 and the joining portions L2 At least one bonding line (L) formed thereon is provided. At this time, the blade member 31 is arranged in the die cutting press 30 so as to form a rectangular band, so that the joining line L can be formed into a rectangular band shape in conformity with a product shape having a substantially rectangular shape.

In addition, the plurality of blades formed on the blunt blade 31b should be spaced apart from each other so that the cutout L1 and the splice L2 can be alternately repeatedly formed. In addition, the number of the splicing lines L is related to the number of the blunt knives 31b provided in the blade member 31. [

Referring to FIG. 4, the cut-out portion L1 is a portion cut through the blunt blade 31b, and the cut-out portion L2 is welded by heat transfer by the blunt blade 31b.

Lastly, the take-out step S60 is a step of separating the meltblown fiber pads P cut and joined in the cutting and joining step S50 from the fabric and taking out and collecting the same.

As a result, the method of manufacturing the meltblown fiber pads according to the present invention can achieve the automation of the process and the operation efficiency by simplifying the process, reducing the manufacturing cost, , It is possible to prevent the damage of the product and to exert its original function.

The present invention is not limited to the above-described embodiments. Anything having substantially the same constitution as the technical idea described in the claims of the present invention and achieving the same operational effect is included in the technical scope of the present invention.

10. Supply roll
20. Heating means
30. Die cutting press
31. Blade member
31a. Cutting blade
31b. Blunt blade
32. Heating element
33. Plywood
C. Cover
F. Meltblown fabric
H. Heating means
L. Connection line
L1. Incision
L2. copula
P. Meltblown fiber pads
R. Feed Roller
W. Polypropylene fiber web

Claims (4)

1. A method for producing a meltblown fiber pad by processing a meltblown fiber fabric with a cover over the exterior of the polypropylene fiber web,
A fabric preparation step of preparing a meltblown fabric by covering the polypropylene fiber web with a cover;
An unwinding step of loosening the meltblown fabric wound around the supply roll;
A softening step of softening the unwoven meltblown fabric at a temperature of 120 ° C to 150 ° C with hot air through a heating means;
A stabilization step of stabilizing the softened meltblown fabric at a temperature of less than 120 캜; And
A cutting and joining step is performed in which the meltblown fiber fabric is passed through a die cutting press to cut and join in a predetermined pattern,
Wherein the die cutting press includes a blade member having one or more dull blades disposed inside a cutting blade and a heating element connected to the blade member,
Wherein cutting and joining are simultaneously performed by applying a power to the heating element to press the meltblown fiber material at a temperature between 160 ° C and 170 ° C.
delete The method according to claim 1,
As a further step in the cutting and joining step,
And removing the processed meltblown fiber pads to separate and take out the meltblown fiber pads.
The method according to claim 1,
Wherein the meltblown fiber pads processed by the cutting and joining step are provided with at least one bonding line formed by alternately forming a cut portion and a bonding portion on an edge.

KR1020160020598A 2016-02-22 2016-02-22 Method for manufacturing meltblown fiber pad KR101627996B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
KR1020160020598A KR101627996B1 (en) 2016-02-22 2016-02-22 Method for manufacturing meltblown fiber pad
PCT/KR2017/001914 WO2017146446A1 (en) 2016-02-22 2017-02-22 Method for manufacturing melt-blown fiber pad

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160020598A KR101627996B1 (en) 2016-02-22 2016-02-22 Method for manufacturing meltblown fiber pad

Publications (1)

Publication Number Publication Date
KR101627996B1 true KR101627996B1 (en) 2016-06-07

Family

ID=56193244

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160020598A KR101627996B1 (en) 2016-02-22 2016-02-22 Method for manufacturing meltblown fiber pad

Country Status (2)

Country Link
KR (1) KR101627996B1 (en)
WO (1) WO2017146446A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101927825B1 (en) * 2018-05-10 2018-12-11 조현배 Sound absorbing material cutting apparatus
CN114481467A (en) * 2022-02-18 2022-05-13 青岛铠硕机械科技有限公司 Greenhouse quilt production line pressure-superposed leveling machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3132222A1 (en) * 2022-02-02 2023-08-04 Ouvry Process for manufacturing a decontamination wipe and corresponding wipe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100327315B1 (en) * 1999-05-14 2002-03-07 김승환 cutting machine for vertical blind
US6893591B2 (en) * 1997-06-06 2005-05-17 International Business Machines Corporation Thermoplastic adhesive preform for heat sink attachment
KR101335301B1 (en) * 2012-06-22 2013-12-02 김봉수 Manufacturing apparatus for make up cotton and manufacturing method thereof
KR20140128610A (en) * 2013-04-29 2014-11-06 (주)태영기계공업 Outline structure of sound absorbing materials of automobile and wooden pattern of press for forming outline of the sound absorbing materials

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4522058B2 (en) * 2003-07-18 2010-08-11 スリーエム イノベイティブ プロパティズ カンパニー Material molding apparatus and method, and molded nonwoven article

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6893591B2 (en) * 1997-06-06 2005-05-17 International Business Machines Corporation Thermoplastic adhesive preform for heat sink attachment
KR100327315B1 (en) * 1999-05-14 2002-03-07 김승환 cutting machine for vertical blind
KR101335301B1 (en) * 2012-06-22 2013-12-02 김봉수 Manufacturing apparatus for make up cotton and manufacturing method thereof
KR20140128610A (en) * 2013-04-29 2014-11-06 (주)태영기계공업 Outline structure of sound absorbing materials of automobile and wooden pattern of press for forming outline of the sound absorbing materials

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101927825B1 (en) * 2018-05-10 2018-12-11 조현배 Sound absorbing material cutting apparatus
CN114481467A (en) * 2022-02-18 2022-05-13 青岛铠硕机械科技有限公司 Greenhouse quilt production line pressure-superposed leveling machine

Also Published As

Publication number Publication date
WO2017146446A1 (en) 2017-08-31

Similar Documents

Publication Publication Date Title
US20210129487A1 (en) Recyclable laminate
KR101627996B1 (en) Method for manufacturing meltblown fiber pad
CN1180933C (en) Improved nonwoven with non-symmetrical bonding configuration
JP4708330B2 (en) Non-woven mat, method for producing the non-woven mat, and fiber composite material
CZ20022503A3 (en) Heat welding process and apparatus for welding fibrous belts
KR101520227B1 (en) Biodegradation Non-Woven Fabric and Manufacturing Apparatus and Manufacturing Method
JP2003313792A (en) Fabric for paper machine and method for producing the same
KR101874742B1 (en) The method for manufacturing Polyester nonwoven fabric having an improved permeability
KR20150011129A (en) Nonwoven fiber for an air filter having an improved fluff and the manufacturing method thereof
KR20110013789A (en) A manufacture-method of mask having a solid-structure
CN104040071A (en) Joining process for a papermachine clothing
CN106120158B (en) Composite wiping material production device and its technique
JPH07227841A (en) Production of continuous angular thermoplastic resin prepreg
CN108018652A (en) A kind of machine oil filter core end cap nonwoven cloth material and its manufacture craft
KR101752768B1 (en) Manufacturing device for non-woven fabric with ball-type fiber buffer, non-woven fabric with ball-type fiber buffer manufactured thereby and manufacturing method therefor
CN106637673A (en) Non-woven cloth processing technology
JPS60167958A (en) Improved knitted fabric and its production
KR101235078B1 (en) Method for manufacturing high strength nano-fiber composit
JPH10310964A (en) Fiber sheet
JP6555777B2 (en) Manufacturing method of sheet-like semi-finished product for FRP manufacturing
KR101788705B1 (en) Nonwoven fabric with excellent bulkiness and manufacturing method of the same from composite filament fiber
JP5514267B2 (en) Carbonization equipment
JP6317962B2 (en) Carpet and manufacturing method thereof
CN109501429A (en) A kind of environment-friendly type hot glue nonwoven wall paper equipment complex
CN109023726A (en) A kind of production technology of filter cloth

Legal Events

Date Code Title Description
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant