CN113386401A - Cast polypropylene peelable release film and processing method thereof - Google Patents

Cast polypropylene peelable release film and processing method thereof Download PDF

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Publication number
CN113386401A
CN113386401A CN202110685866.0A CN202110685866A CN113386401A CN 113386401 A CN113386401 A CN 113386401A CN 202110685866 A CN202110685866 A CN 202110685866A CN 113386401 A CN113386401 A CN 113386401A
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layer
polypropylene
release film
gap cone
temperature
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CN202110685866.0A
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Chinese (zh)
Inventor
李刚
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Yangzhou Alvin Film Co ltd
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Yangzhou Alvin Film Co ltd
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Priority to CN202110685866.0A priority Critical patent/CN113386401A/en
Publication of CN113386401A publication Critical patent/CN113386401A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/02—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions
    • B32B3/08—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts
    • B32B3/085—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by features of form at particular places, e.g. in edge regions characterised by added members at particular parts spaced apart pieces on the surface of a layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/266—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by an apertured layer, the apertures going through the whole thickness of the layer, e.g. expanded metal, perforated layer, slit layer regular cells B32B3/12
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/0007—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality
    • B32B37/003—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding involving treatment or provisions in order to avoid deformation or air inclusion, e.g. to improve surface quality to avoid air inclusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/04—Punching, slitting or perforating
    • B32B2038/047—Perforating

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention discloses a cast polypropylene peelable release film and a processing method thereof, belonging to the technical field of release films, and comprising a corona layer, a middle layer and a heat sealing layer, wherein first gap cone assemblies are paved at the top and the bottom of the middle layer, first exhaust holes are formed in the middle layer at equal intervals, a second gap cone assembly is arranged between the bottom of the corona layer and the top of the heat sealing layer and between the middle layer and the middle layer, and pressing bubble gas can be exhausted to the bottom of the middle layer or further through the first exhaust holes through the second exhaust holes, and can be exhausted from the edge part because the side part of the middle layer is in an opening relation with the corona layer and the heat sealing layer, so that the problem of bubbles is avoided, and the operation is simple and easy to manufacture.

Description

Cast polypropylene peelable release film and processing method thereof
Technical Field
The invention relates to a release film, in particular to a cast polypropylene peelable release film, and also relates to a method for processing the release film, in particular to a method for processing the cast polypropylene peelable release film, belonging to the technical field of release films.
Background
Release films are films whose surface energy is differentiated, and release films are not sticky or slightly sticky after being contacted with a particular material under limited conditions.
In general, in order to increase the release force of the plastic film, the plastic film is subjected to plasma treatment, or fluorine coating, or silicon release agent coating on the surface layer of the film material, such as PET, PE, OPP, etc.; the release film has the advantages that the release film can show extremely light and stable release force for various different organic pressure-sensitive adhesives, the release force of the release film is different according to different requirements, the viscosity of the product adhesive is isolated, and the release force is correspondingly adjusted, so that the extremely light and stable release force is achieved when the product adhesive is peeled.
The cast polypropylene peelable release film in the prior art has the problem that bubbles are easily generated due to tight attachment when the cast polypropylene peelable release film is used, and the problem of wrinkling of the cast polypropylene peelable release film due to the fact that gas cannot be discharged smoothly after the bubbles are generated is solved.
Disclosure of Invention
The invention mainly aims to provide a cast polypropylene peelable release film and a processing method thereof.
The purpose of the invention can be achieved by adopting the following technical scheme:
the utility model provides a curtain coating polypropylene strippable is from type membrane, includes corona layer, intermediate level and heat-seal layer, first clearance awl subassembly has been laid to the top and the bottom in intermediate level, just equidistant first exhaust hole of having seted up in the intermediate level, the bottom on corona layer and the top on heat-seal layer with be equipped with second clearance awl subassembly between the intermediate level, pile together in proper order between corona layer, intermediate level and the heat-seal layer, be the opening relation between lateral part and corona layer and the heat-seal layer in intermediate level, equidistant second exhaust hole of having seted up on the heat-seal layer.
Preferably, the first gap cone assembly comprises a first upper gap cone and a second lower gap cone, and the top and the bottom are respectively distributed with the first upper gap cone and the second lower gap cone.
Preferably, the second gap cone assembly includes a second upper gap cone and a first lower gap cone, the top portion having the second upper gap cone disposed thereon, and the bottom portion having the first lower gap cone disposed thereon.
Preferably, the corona layer is prepared from polypropylene homopolymerized resin.
Preferably, the intermediate layer is prepared by mixing polypropylene homopolymerized resin and ternary copolymerized polypropylene.
Preferably, the heat-sealing layer is prepared by mixing polypropylene homopolymerization resin, ternary polymerization polypropylene, smooth master batch, open master batch and processing aid.
A processing method of a cast polypropylene peelable release film comprises the following steps:
step 1: firstly, taking a polypropylene homopolymerization resin raw material, carrying out high-temperature pressure on a mould, then melting, and then lifting a pressure plate;
step 2: the polypropylene homopolymerization resin which is partially melted by the rising of the pressing plate is adhered with the pressing plate to form a first lower gap cone structure of a first lower gap cone, and then the temperature is rapidly reduced to solidify the polypropylene homopolymerization resin to form a corona layer, a first lower gap cone assembly of the first lower gap cone and a heat sealing layer and a second upper gap cone assembly;
and step 3: firstly, placing polypropylene homopolymerization resin and ternary copolymerization polypropylene in a high-temperature mixing box for high-temperature melting and mixing, and then discharging the mixture into a mold;
and 4, step 4: pressing and holding the polypropylene homopolymerization resin and ternary copolymerization polypropylene mixed solution through a low-temperature pressing and holding plate, then pulling up and rapidly cooling to form a middle layer and a first upper clearance cone assembly;
and 5: the two groups of intermediate layers and the first upper gap cone assembly plane are attached together to form an assembly of the intermediate layers, the first upper gap cone and the second lower gap cone, and the two groups of intermediate layers are fused at high temperature;
step 6: inserting the middle layer through high-temperature inserting hole equipment to form a first exhaust hole;
and 7: the corona layer, the middle layer and the heat sealing layer are sequentially attached together, and are rapidly cooled after being attached together by hot pressing after gelling.
Preferably, the temperature rise and melting temperature in the step 2 is 600-800 ℃.
Preferably, the cooling temperature of 4 is-20 to-5 ℃.
Preferably, the hot pressing temperature in step 7 is 40-60 ℃.
The invention has the beneficial technical effects that:
according to the cast polypropylene peelable release film and the processing method thereof, the first clearance cone assemblies are paved at the top and the bottom of the middle layer, the first exhaust holes are formed in the middle layer at equal intervals, bubbles can be generated when the release film is attached to equipment for trial use such as electronic equipment, and then the gas of the bubbles can be exhausted to the bottom of the middle layer or through the first exhaust holes by pressing the release film, and can be exhausted from the edge part because the side part of the middle layer is in an opening relation with the corona layer and the heat sealing layer, so that the problem of bubbles is avoided, and the cast polypropylene peelable release film is simple to operate and easy to manufacture.
Drawings
Fig. 1 is an exploded view of the overall structure of an apparatus according to a preferred embodiment of a cast polypropylene peelable release film and a method for processing the same according to the present invention.
In the figure: 1-corona layer, 2-heat sealing layer, 3-middle layer, 4-first lower gap cone, 5-first upper gap cone, 6-second upper gap cone, 7-second lower gap cone, 8-first vent hole and 9-second vent hole.
Detailed Description
In order to make the technical solutions of the present invention more clear and definite for those skilled in the art, the present invention is further described in detail below with reference to the examples and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
As shown in fig. 1, the cast polypropylene peelable release film provided by the embodiment comprises a corona layer 1, a middle layer 3 and a heat sealing layer 2, wherein first gap cone assemblies are laid at the top and the bottom of the middle layer 3, first exhaust holes 8 are formed in the middle layer 3 at equal intervals, a second gap cone assembly is arranged between the bottom of the corona layer 1 and the top of the heat sealing layer 2 and the middle layer 3, the corona layer 1, the middle layer 3 and the heat sealing layer 2 are sequentially stacked together, the side portion of the middle layer 3 and the corona layer 1 and the heat sealing layer 2 are in an open relationship, and second exhaust holes 9 are formed in the heat sealing layer 2 at equal intervals.
Wherein adopt and laid first clearance awl subassembly in the top and the bottom of intermediate level 3 to and the equidistant first exhaust hole 8 of having seted up in intermediate level 3, can produce the bubble when will laminating in the equipment of trying such as electronic equipment with the parting film, then press the gaseous bottom or the rethread first exhaust hole 8 that can discharge to intermediate level 3 through second exhaust hole 9 of bubble, because the lateral part and corona layer 1 and the heat-seal layer 2 of intermediate level 3 between be the opening relation then can follow limit portion and discharge, thereby the problem of bubble has been avoided, easy operation makes simply.
In this embodiment, the first gap cone assembly includes a first upper gap cone 5 and a second lower gap cone 7, and the top and the bottom of the first upper gap cone 5 and the second lower gap cone 7 are respectively distributed with the first upper gap cone 5 and the second lower gap cone 7.
In this embodiment, the second gap cone assembly includes a second upper gap cone 6 and a first lower gap cone 4, 2 having a top portion with the second upper gap cone 6 and a bottom portion with the first lower gap cone 4.
In this embodiment, the corona layer 1 is made of polypropylene homopolymer resin.
In this embodiment, the intermediate layer 3 is prepared by mixing polypropylene homopolymer resin and terpolymer polypropylene.
In this embodiment, the heat-sealing layer 2 is prepared by mixing polypropylene homo-polymer resin, terpolymer polypropylene, smooth master batch, open master batch and processing aid.
A processing method of a cast polypropylene peelable release film comprises the following steps:
step 1: firstly, taking a polypropylene homopolymerization resin raw material, carrying out high-temperature pressure on a mould, then melting, and then lifting a pressure plate;
step 2: the polypropylene homopolymerization resin which is partially melted by the rising of the pressing plate is adhered with the pressing plate to form a first lower gap cone 4 structure, and then the temperature is rapidly reduced to solidify the polypropylene homopolymerization resin to form a corona layer 1, first lower gap cone 4 assembly, a heat sealing layer 2 and a second upper gap cone 6 assembly;
and step 3: firstly, placing polypropylene homopolymerization resin and ternary copolymerization polypropylene in a high-temperature mixing box for high-temperature melting and mixing, and then discharging the mixture into a mold;
and 4, step 4: pressing and holding the polypropylene homopolymer resin and the ternary copolymer polypropylene mixed solution by a low-temperature pressing and holding plate, then pulling up and rapidly cooling to form a middle layer 3 and first upper gap cone 5 assembly;
and 5: the two groups of intermediate layers 3 and the first upper gap cone 5 are combined together in a plane fitting manner to form a combination of the intermediate layers 3, the first upper gap cone 5 and the second lower gap cone 7, and the two groups of intermediate layers 3 are fused at high temperature;
step 6: inserting the middle layer 3 through high-temperature inserting equipment to form a first exhaust hole 8;
and 7: the corona layer 1, the middle layer 3 and the heat sealing layer 2 are sequentially attached together, and are bonded together by hot pressing after gelation, and then are rapidly cooled to form the release film.
In the present embodiment, the temperature-raising melting temperature in step 2 is 600-800 ℃.
In the embodiment, the cooling temperature of 4 is-20 to-5 ℃.
In this embodiment, the hot pressing temperature in step 7 is 40-60 ℃.
The above are only further embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution of the present invention and its concept within the scope of the present invention.

Claims (10)

1. A cast polypropylene peelable release film is characterized in that: including corona layer (1), intermediate level (3) and heat-seal layer (2), first clearance awl subassembly has been laid to the top and the bottom in intermediate level (3), just equidistant first exhaust hole (8) of having seted up in intermediate level (3), the bottom of corona layer (1) and the top on heat-seal layer (2) with be equipped with second clearance awl subassembly between intermediate level (3), pile together in proper order between corona layer (1), intermediate level (3) and the heat-seal layer (2), be the opening relation between the lateral part of intermediate level (3) and corona layer (1) and heat-seal layer (2), equidistant second exhaust hole (9) of having seted up on heat-seal layer (2).
2. The cast polypropylene peelable release film according to claim 1, wherein: the first gap cone assembly comprises a first upper gap cone (5) and a second lower gap cone (7), and the top and the bottom of the first gap cone assembly (3) are respectively provided with the first upper gap cone (5) and the second lower gap cone (7).
3. The cast polypropylene peelable release film according to claim 2, wherein: the second gap cone assembly comprises a second upper gap cone (6) and a first lower gap cone (4), the second upper gap cone (6) is distributed on the top part of the (2), and the first lower gap cone (4) is distributed on the bottom part of the (1).
4. The cast polypropylene peelable release film according to claim 3, wherein: the corona layer (1) is prepared from polypropylene homopolymerization resin.
5. The cast polypropylene peelable release film according to claim 4, wherein: the intermediate layer (3) is prepared by mixing polypropylene homopolymerized resin and ternary copolymerized polypropylene.
6. The cast polypropylene peelable release film according to claim 5, wherein: the heat sealing layer (2) is prepared by mixing polypropylene homopolymerization resin, ternary polymerization polypropylene, smooth master batch, opening master batch and processing aid.
7. The cast polypropylene peelable release film process of claim 6, wherein: the method comprises the following steps:
step 1: firstly, taking a polypropylene homopolymerization resin raw material, carrying out high-temperature pressure on a mould, then melting, and then lifting a pressure plate;
step 2: the polypropylene homopolymerization resin which is partially melted by the rising of the pressing plate is adhered with the pressing plate to form a first lower gap cone (4) structure, and then the temperature is rapidly reduced to solidify the polypropylene homopolymerization resin to form a corona layer (1), first lower gap cone (4) assembly and a heat sealing layer (2) and second upper gap cone (6) assembly;
and step 3: firstly, placing polypropylene homopolymerization resin and ternary copolymerization polypropylene in a high-temperature mixing box for high-temperature melting and mixing, and then discharging the mixture into a mold;
and 4, step 4: pressing and holding the polypropylene homopolymerization resin and ternary copolymerization polypropylene mixed solution through a low-temperature pressing and holding plate, then pulling up and rapidly cooling to form a middle layer (3) and first upper gap cone (5) assembly;
and 5: the planes of the two groups of intermediate layers (3) and the first upper gap cone (5) are attached together to form an assembly of the intermediate layers (3), the first upper gap cone (5) and the second lower gap cone (7), and the two groups of intermediate layers (3) are fused at high temperature;
step 6: inserting the middle layer (3) through high-temperature inserting hole equipment to form a first exhaust hole (8);
and 7: the corona layer (1), the middle layer (3) and the heat sealing layer (2) are sequentially attached together, and are rapidly cooled after being attached together by hot pressing after gelling to form the release film.
8. The cast polypropylene peelable release film process of claim 7, wherein: wherein the temperature rise melting temperature in the step 2 is 600-800 ℃.
9. The cast polypropylene peelable release film process of claim 8, wherein: wherein the cooling temperature of 4 is-20 to-5 ℃.
10. The cast polypropylene peelable release film process of claim 9, wherein: wherein the hot pressing temperature in the step 7 is 40-60 ℃.
CN202110685866.0A 2021-06-21 2021-06-21 Cast polypropylene peelable release film and processing method thereof Pending CN113386401A (en)

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Application Number Priority Date Filing Date Title
CN202110685866.0A CN113386401A (en) 2021-06-21 2021-06-21 Cast polypropylene peelable release film and processing method thereof

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Application Number Priority Date Filing Date Title
CN202110685866.0A CN113386401A (en) 2021-06-21 2021-06-21 Cast polypropylene peelable release film and processing method thereof

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CN113386401A true CN113386401A (en) 2021-09-14

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103231567A (en) * 2013-04-19 2013-08-07 黄山永新股份有限公司 RCPP film for packaging and preparation method thereof
CN208234839U (en) * 2018-02-07 2018-12-14 昆山云松电子材料有限公司 Soft scalable ultra-thin release film
CN112026315A (en) * 2020-07-14 2020-12-04 黄山永新股份有限公司 Cast polypropylene peelable release film and preparation method thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103231567A (en) * 2013-04-19 2013-08-07 黄山永新股份有限公司 RCPP film for packaging and preparation method thereof
CN208234839U (en) * 2018-02-07 2018-12-14 昆山云松电子材料有限公司 Soft scalable ultra-thin release film
CN112026315A (en) * 2020-07-14 2020-12-04 黄山永新股份有限公司 Cast polypropylene peelable release film and preparation method thereof

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Application publication date: 20210914