KR20190073031A - Manufacturing method of micro cell acryl foam having excellent restoring force - Google Patents

Manufacturing method of micro cell acryl foam having excellent restoring force Download PDF

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KR20190073031A
KR20190073031A KR1020170174278A KR20170174278A KR20190073031A KR 20190073031 A KR20190073031 A KR 20190073031A KR 1020170174278 A KR1020170174278 A KR 1020170174278A KR 20170174278 A KR20170174278 A KR 20170174278A KR 20190073031 A KR20190073031 A KR 20190073031A
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foaming
coating
foam
heat treatment
acrylic foam
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KR102014449B1 (en
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신용훈
조강희
권익수
박민수
구광모
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주식회사 영우
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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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • 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
    • B32B27/065—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 foam
    • 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
    • B32B38/0036—Heat treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066—Use of inorganic compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/22—After-treatment of expandable particles; Forming foamed products
    • C08J9/228—Forming foamed products
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K7/00—Use of ingredients characterised by shape
    • C08K7/02—Fibres or whiskers
    • C08K7/04—Fibres or whiskers inorganic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • 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
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/243—Coating
    • 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
    • B32B2038/0052—Other operations not otherwise provided for
    • B32B2038/0084—Foaming
    • 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
    • B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
    • B32B2309/02—Temperature

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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The present disclosure relates to a method for manufacturing microcell acrylic foam having excellent restoration performance. More particularly, the method comprises: a raw material mixing step of mixing an acrylic resin, a foaming agent, silica powder, and a curing agent; a foaming step of foaming a mixture manufactured by the raw material mixing step with a mechanical stirrer; a coating step of coating a foam product foamed through the foaming step; a heat treatment step of heating the foam product coated through the coating step; and an aging step of aging the foam product cured through the heat treatment step. The acrylic foam manufactured through the abovementioned process is solvent-free, thereby being environmentally friendly; and exhibits excellent restoration force even when being molded thinly by forming microcells having a uniform size.

Description

복원성능이 우수한 마이크로셀 아크릴폼의 제조방법 {MANUFACTURING METHOD OF MICRO CELL ACRYL FOAM HAVING EXCELLENT RESTORING FORCE}TECHNICAL FIELD [0001] The present invention relates to a method of manufacturing a microcellular acrylic foam having excellent restoration performance,

개시된 내용은 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법에 관한 것으로, 더욱 상세하게는 무용제형으로 친환경적이며, 균일한 크기의 마이크로셀이 형성되어 얇게 성형하더라도 우수한 복원력을 나타내는 아크릴폼의 제조방법에 관한 것이다.
The present invention relates to a method of manufacturing an acrylic foam having excellent restoration performance, and more particularly, to a method of manufacturing an acrylic foam which is environmentally-friendly and has a uniform size, .

아크릴폼은 아크릴수지에 발포제 등을 혼합하여 발포하는 과정을 통해 제조되는데, 폼 자체로 완충효과를 요하는 부품으로 사용되거나, 자동차의 실링제와 차체사이에서 차체와 EPDM고무를 접착하거나, 엠블렘이나 사이드몰딩을 접착하는 테이프 등의 재료로 사용되고, 그 외에도 디스플레이가 구비된 전자기기 등에 주로 적용된다.Acrylic foam is produced by mixing acrylic resin with foaming agent and foaming. It can be used as a part that requires buffer effect by the foam itself, or it can be used to bond the body and EPDM rubber between the sealing agent and the body of the automobile, A tape for adhering a side molding, and the like, and is mainly applied to an electronic device provided with a display.

최근에는 다양한 모양과 용도의 아크릴폼을 이용하기 위하여 정밀컷팅 가공과 취급의 용이성이 요구되고 있으며, 얇은 두께를 나타내더라도 우수한 완충효과를 나타내는 아크릴폼을 제조하기 위해 시도가 지속적으로 이루어지고 있다.In recent years, in order to use acrylic foam of various shapes and uses, it is required to perform precision cutting processing and ease of handling, and attempts have been continuously made to produce acrylic foam which exhibits excellent buffering effect even if it shows a thin thickness.

종래에는 아크릴폼을 제조하는 과정에서 일반적으로 용제형 수지가 사용되고 있는데, 용제형 수지를 이용하는 경우에는 용제로부터 발생하는 휘발성 유기화합물로 인해 친환경적이지 못한 문제점이 있었으며, 제조과정에서 발포제에 의한 화학적 발포가 주로 이루어져 셀 구조물의 크기를 조절하기 어려운 문제점이 있었다.Conventionally, a solvent type resin is generally used in the process of producing an acrylic foam. When a solvent type resin is used, there is a problem in that it is not environmentally friendly due to volatile organic compounds generated from the solvent. In the manufacturing process, chemical foaming It is difficult to control the size of the cell structure.

또한 종래에 아크릴폼은 화학적 발포로 인해 형성되는 셀이 크기가 크기 때문에, 아크릴폼을 얇은 두께로 성형할 수 없었으며, 제조되는 폼의 복원력이 낮은 문제점이 있었다.In addition, in the conventional acrylic foam, since the cell formed due to the chemical foaming is large, the acrylic foam can not be formed into a thin thickness and the resilience of the foam to be manufactured is low.

따라서, 용제를 사용하지 않아 친환경적이며, 균일한 크기의 마이크로셀이 형성되어 얇은 두께로 성형하더라도 우수한 복원력을 나타내는 아크릴폼의 제조가 요구되고 있다.
Therefore, there is a demand for the production of acrylic foam which does not use a solvent and which is environmentally friendly and has a uniform size, and which exhibits excellent restoring force even when formed into a thin thickness.

한국특허공개 제10-2015-0123368호(2015.11.04)Korean Patent Laid-Open No. 10-2015-0123368 (Nov. 한국특허등록 제10-1598658호(2016.02.23)Korean Patent Registration No. 10-1598658 (Feb. 23, 2016)

개시된 내용은 무용제형으로 친환경적이며, 균일한 크기의 마이크로셀이 형성되어 얇게 성형하더라도 우수한 복원력을 나타내는 아크릴폼의 제조방법을 제공하는 것이다.
It is an object of the present invention to provide a method for producing acrylic foam which is eco-friendly and has a uniform size of microcells and exhibits excellent restoring force even when it is thinly formed.

하나의 일 실시예로서 이 개시의 내용은 아크릴수지, 발포제, 실리카분말 및 경화제를 혼합하는 원료혼합단계, 상기 원료혼합단계를 통해 제조된 혼합물을 기계식 교반기로 발포하는 발포단계, 상기 발포단계를 통해 발포된 발포물을 필름에 코팅하는 코팅단계, 상기 코팅단계를 통해 코팅된 발포물을 가열하는 열처리단계 및 상기 열처리단계를 통해 경화된 발포물을 숙성하는 숙성단계로 이루어지는 것을 특징으로 하는 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법에 대해 기술하고 있다.In one embodiment, the content of the disclosure includes a raw material mixing step of mixing an acrylic resin, a foaming agent, a silica powder and a curing agent, a foaming step of foaming the mixture prepared through the raw material mixing step with a mechanical stirrer, Characterized by comprising a coating step of coating a foamed foamed material on a film, a heat treatment step of heating the foamed material coated through the coating step, and an aging step of aging the foamed material cured through the heat treatment step Describes a method for producing excellent microcellular acrylic foam.

바람직하기로는, 상기 원료혼합단계는 아크릴수지 100 중량부, 발포제 2 내지 5 중량부, 실리카분말 1.5 내지 2.5 중량부 및 경화제 2 내지 4 중량부로 이루어질 수 있다.Preferably, the raw material mixing step may comprise 100 parts by weight of an acrylic resin, 2 to 5 parts by weight of a foaming agent, 1.5 to 2.5 parts by weight of silica powder, and 2 to 4 parts by weight of a curing agent.

더 바람직하기로는, 상기 발포단계는 35 내지 45℃의 온도에서 1000 내지 3000rpm의 속도로 30 내지 50분 동안 이루어질 수 있다.More preferably, the foaming step may be carried out at a temperature of 35 to 45 DEG C at a rate of 1000 to 3000 rpm for 30 to 50 minutes.

더욱 바람직하기로는, 상기 열처리단계는 60℃에서 150℃까지 45초에 30℃도씩 승온시킨 후에 150℃의 온도에서 40 내지 50초 동안 가열하여 이루어질 수 있다.More preferably, the heat treatment step may be performed by heating from 60 ° C to 150 ° C for 45 seconds at 30 ° C, followed by heating at 150 ° C for 40 to 50 seconds.

더욱 더 바람직하기로는, 상기 숙성공정은 55 내지 65℃의 온도에서 70 내지 75시간 동안 이루어질 수 있다.
Even more preferably, the aging process can be performed at a temperature of 55 to 65 DEG C for 70 to 75 hours.

이상에서와 같은 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법은 무용제형으로 친환경적이며, 균일한 크기의 마이크로셀이 형성되어 얇게 성형하더라도 우수한 복원력을 나타내는 아크릴폼을 제공하는 탁월한 효과를 나타낸다.
The method of manufacturing a microcellular acrylic foam having excellent restoration performance as described above is an environmentally friendly, non-solventable, microcell having a uniform size, and exhibits an excellent effect of providing an acrylic foam exhibiting excellent restoring force even when it is thinly molded.

도 1은 개시된 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법을 나타낸 순서도이다.
도 2 내지 3은 개시된 실시예 1을 통해 제조된 아크릴폼의 단면을 SEM으로 촬영하여 나타낸 사진이다.1 is a flowchart showing a method of manufacturing a microcellular acrylic foam having excellent restoration performance.
Figs. 2 to 3 are photographs of SEM photographs of cross-sections of the acrylic foam produced through the disclosed Embodiment 1. Fig.

이하에는, 본 발명의 바람직한 실시예와 각 성분의 물성을 상세하게 설명하되, 이는 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자가 발명을 용이하게 실시할 수 있을 정도로 상세하게 설명하기 위한 것이지, 이로 인해 본 발명의 기술적인 사상 및 범주가 한정되는 것을 의미하지는 않는다.
Hereinafter, preferred embodiments of the present invention and physical properties of the respective components will be described in detail with reference to the accompanying drawings. However, the present invention is not limited thereto, And this does not mean that the technical idea and scope of the present invention are limited.

개시된 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법은 아크릴수지, 발포제, 실리카분말 및 경화제를 혼합하는 원료혼합단계(S101), 상기 원료혼합단계(S101)를 통해 제조된 혼합물을 기계식 교반기로 발포하는 발포단계(S103), 상기 발포단계(S103)를 통해 발포된 발포물을 필름에 코팅하는 코팅단계(S105), 상기 코팅단계(S105)를 통해 코팅된 발포물을 가열하는 열처리단계(S107) 및 상기 열처리단계(S107)를 통해 경화된 발포물을 숙성하는 숙성단계(S109)로 이루어진다.
A method of manufacturing a microcellular acrylic foam having excellent restoration performance includes a raw material mixing step (S101) for mixing an acrylic resin, a foaming agent, a silica powder and a curing agent; a step for foaming the mixture prepared through the raw material mixing step (S101) A coating step S105 for coating the foamed foamed material through the foaming step S103, a heat treatment step S107 for heating the foamed material coated through the coating step S105, And an aging step (S 109) in which the cured foamed material is aged through the heat treatment step (S 107).

상기 원료혼합단계(S101)는 아크릴수지, 발포제, 실리카분말 및 경화제를 혼합하는 단계로, 아크릴수지 100 중량부, 발포제 2 내지 5 중량부, 실리카분말 1.5 내지 2.5 중량부 및 경화제 2 내지 4 중량부를 혼합하여 이루어진다.Mixing the acrylic resin, the foaming agent, the silica powder and the curing agent, and mixing 100 parts by weight of the acrylic resin, 2 to 5 parts by weight of the foaming agent, 1.5 to 2.5 parts by weight of the silica powder and 2 to 4 parts by weight of the curing agent, .

상기 아크릴수지는 무용제형으로, 수분산 또는 수성 아크릴로 이루어지는 것이 바람직하다.The acrylic resin is preferably in the form of a water-insoluble, water-dispersible or aqueous acrylic.

상기 발포제는 하이드로카본계 발포제를 사용하는 것이 바람직하며, 펜텐이나 이소펜텐이 더욱 바람직한데, 상기 발포단계(S103)에서 혼합물의 발포효과를 향상시키는 역할을 하는데, 상기 발포제의 함량이 2 중량부 미만이면 상기의 효과가 미미하며, 상기 발포제의 함량이 5 중량부를 초과하게 되면 혼합물의 발포배율이 지나치게 증가하여 제조되는 아크릴폼의 기계적 물성과 복원력이 저하될 수 있다.The blowing agent is preferably a hydrocarbon-based blowing agent, more preferably pentene or isopentene. The blowing agent serves to improve the foaming effect of the mixture in the foaming step (S103). When the content of the blowing agent is less than 2 parts by weight The above effect is insignificant. If the content of the blowing agent exceeds 5 parts by weight, the foaming magnification of the mixture is excessively increased and the mechanical properties and restoring force of the acrylic foam to be produced may be lowered.

상기 실리카분말 혼합물의 점도와 기계적 물성을 향상시키는 역할을 하는데, 상기 실리카분말의 함량이 1.5 중량부 미만이면 상기의 효과가 미미하며, 상기 실리카분말의 함량이 2.5 중량부를 초과하게 되면 상기의 효과는 크게 향상되지 않고 혼합물의 점도가 지나치게 증가하여 상기 발포단계에서의 발포효과가 저하될 수 있다.When the content of the silica powder is less than 1.5 parts by weight, the above effect is insignificant. When the content of the silica powder exceeds 2.5 parts by weight, The viscosity of the mixture is excessively increased and the foaming effect in the foaming step may be lowered.

상기 경화제는 이소시아네이트, 에폭시, 멜라민 및 이지리딘 등과 같은 열경화제를 사용하는 것이 바람직한데, 상기 열처리단계에서 코팅된 발포물의 건조와 경화를 동시에 진행하기 위해서는 상기에 나열된 성분들과 같은 열경화제를 사용하는 것이 바람직하다.The curing agent is preferably a thermosetting agent such as isocyanate, epoxy, melamine, and isyridine. In order to simultaneously perform drying and curing of the foamed material coated in the heat treatment step, a thermosetting agent such as those listed above is used .

이때, 상기 경화제의 함량이 2 중량부 미만이면 상기의 효과가 미미하며, 상기 경화제의 함량이 4 중량부를 초과하게 되면 제조되는 아크릴폼의 경도가 지나치게 향상되어 폼이 갖는 탄성이나 복원력 등이 저하될 수 있다. If the content of the curing agent is less than 2 parts by weight, the effect is insignificant. When the content of the curing agent is more than 4 parts by weight, the hardness of the produced acrylic foam is excessively improved, .

상기 발포단계(S103)는 상기 원료혼합단계(S101)를 통해 제조된 혼합물을 기계식 교반기로 발포하는 단계로, 상기 원료혼합단계(S101)를 통해 제조된 혼합물을 기계식 교반기에 투입하고 35 내지 45℃의 온도로 승온시킨 후에 1000 내지 3000rpm의 속도로 30 내지 50분 동안 교반하여 이루어진다.The foaming step (S103) is a step of foaming the mixture prepared through the raw material mixing step (S101) with a mechanical stirrer. The mixture prepared through the raw material mixing step (S101) is put into a mechanical stirrer, And then stirring at a speed of 1000 to 3000 rpm for 30 to 50 minutes.

상기와 같은 온도와 교반속도로 교반과정을 진행하면서 발생하는 진동과 상기 혼합물에 함유된 발포제에 의해 혼합물의 발포가 진행되면서 무수히 많은 마이크로셀이 형성되는데, 발포제만을 사용하여 발포를 진행하는 경우와 비교했을 때, 마이크로셀의 생성비율이나 셀의 고르기가 월등하게 향상된다.
As a result of the vibration generated during the stirring process at the temperature and the stirring speed and the foaming agent contained in the mixture, the micro-cells are formed as the mixture is being foamed. Compared with the case where foaming is performed using only the foaming agent , The generation rate of the micro cells and the selection of the cells are significantly improved.

상기 코팅단계(S105)는 상기 발포단계(S103)를 통해 발포된 발포물을 필름에 코팅하는 단계로, 상기 발포단계(S103)를 통해 발포된 발포물을 콤마코팅(Comma coating)방식으로 이형 필름 또는 폴리에스테르, 폴리올레핀, 폴리이미드 및 폴리에틸렌테레프탈레이트 등의 필름에 100 내지 1000㎛의 두께로 코팅하는 단계다.The coating step (S105) is a step of coating a foamed material foamed through the foaming step (S103) on a film, and the foamed material foamed through the foaming step (S103) is applied by a comma coating method to a release film Or a film of polyester, polyolefin, polyimide and polyethylene terephthalate to a thickness of 100 to 1000 탆.

이때, 상기 이형 필름에 발포물을 코팅하게 되면 무기재형 아크릴폼이 제조되며, 상기 폴리에스테르, 폴리올레핀, 폴리이미드 및 폴리에틸렌테레프탈레이트 필름에 코팅하는 경우에는 기재형 아크릴폼이 제조된다.
At this time, inorganic foamed acrylic foam is prepared by coating the foamed film on the release film, and base foamed acrylic foam is formed when coated on the polyester, polyolefin, polyimide and polyethylene terephthalate film.

상기 열처리단계(S107)는 상기 코팅단계(S105)를 통해 코팅된 발포물을 가열하는 단계로, 상기 코팅단계(S105)를 통해 필름에 코팅된 발포물을 60℃에서 150℃까지 45초에 30℃도씩 승온시킨 후에 150℃의 온도에서 40 내지 50초 동안 가열하여 이루어진다.The heat treatment step (S107) is a step of heating the foamed material coated through the coating step (S105). The foamed material coated on the film through the coating step (S105) is heated from 60 ° C to 150 ° C in 45 seconds Deg.] C, followed by heating at a temperature of 150 [deg.] C for 40 to 50 seconds.

상기 열처리단계(S107)를 통해 필름에 코팅된 발포물에 함유된 수분이 제거되어 건조됨과 동시에 상기 발포물에 함유되어 있는 경화제로 인해 경화가 진행되는데, 상기와 같이 열처리단계에서의 승온조건을 적용하는 이유는 발포물을 고온에서 직접 노출하게 되면, 건조와 경화가 급속하게 진행되어 발포물의 표면이 고르게 형성되지 못하기 때문이다.In the heat treatment step (S107), the water contained in the foamed material coated on the film is removed and dried, and at the same time, the curing is progressed by the curing agent contained in the foamed material. As described above, The reason for this is that when the foamed material is directly exposed at a high temperature, the drying and curing rapidly proceed and the surface of the foamed material can not be uniformly formed.

상기 숙성단계(S109)는 상기 열처리단계(S107)를 통해 경화된 발포물을 숙성하는 단계로, 상기 열처리단계(S107)를 통해 경화된 발포물을 55 내지 65℃의 온도에서 70 내지 75시간 동안 숙성시키는 단계다.The aging step (S109) is a step of aging the cured foamed product through the heat treatment step (S107). The cured foamed product through the heat treatment step (S107) is heated at a temperature of 55 to 65 ° C for 70 to 75 hours It is a stage to aging.

상기의 온도와 시간 동안 숙성된 발포물은 형태안정성이 향상되어 온도변화에 따른 수축이나 뒤틀림 현상이 개선된다.
The foamed material aged at the above-mentioned temperature and time is improved in shape stability, so that the shrinkage or warping phenomenon with the temperature change is improved.

이하에서는, 개시된 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법 및 그 제조방법을 통해 제조된 아크릴폼의 물성을 실시예를 들어 설명하기로 한다.
Hereinafter, the method for producing a microcellular acrylic foam having excellent restoration performance and the physical properties of the acrylic foam manufactured through the method will be described.

<실시예 1>&Lt; Example 1 >

아크릴수지 100 중량부, 발포제(하이드로카본) 3.5 중량부, 실리카분말 2 중량부 및 경화제(이소시아네이트) 3 중량부를 혼합한 후에 기계식 교반기에 투입하고 40℃의 온도에서 2000rpm의 속도로 40분 동안 발포한 후에, 발포된 발포물을 이형필름(폴리에틸렌테레프탈레이트 필름의 단면에 실리콘 조성물이 도포된 것)에 콤마코팅방식으로 100 마이크로미터의 두께로 도포하고, 발포물이 도포된 이형필름을 60℃에서 150℃까지 45초에 30℃도씩 승온시킨 후에 150℃의 온도에서 45초 동안 가열하고, 60℃의 온도에서 72시간 동안 숙성하여 복원성능이 우수한 마이크로셀 아크릴폼을 제조하였다.
After mixing 100 parts by weight of an acrylic resin, 3.5 parts by weight of a foaming agent (hydrocarbon), 2 parts by weight of silica powder and 3 parts by weight of a curing agent (isocyanate), the mixture was introduced into a mechanical stirrer and foamed at a temperature of 40 DEG C at a speed of 2000 rpm for 40 minutes Thereafter, the foamed foamed product was applied on a release film (one having a silicone composition coated on the cross section of the polyethylene terephthalate film) with a comma coating method to a thickness of 100 micrometers, and the release film coated with the foamed product was heated at 60 DEG C for 150 Lt; 0 &gt; C for 45 seconds, heated at 150 &lt; 0 &gt; C for 45 seconds, and aged at a temperature of 60 &lt; 0 &gt; C for 72 hours to prepare microcellular acrylic foam having excellent restoration performance.

<실시예 2>&Lt; Example 2 >

상기 실시예 1과 동일하게 진행하되, 콤마코팅방식으로 200 마이크로미터의 두께로 도포하여 복원성능이 우수한 마이크로셀 아크릴폼을 제조하였다.
The procedure of Example 1 was followed by coating with a comma coating method at a thickness of 200 micrometers to prepare a microcellular acrylic foam having excellent restoration performance.

<실시예 3>&Lt; Example 3 >

상기 실시예 1과 동일하게 진행하되, 콤마코팅방식으로 300 마이크로미터의 두께로 도포하여 복원성능이 우수한 마이크로셀 아크릴폼을 제조하였다.
The procedure of Example 1 was followed by coating with a comma coating method at a thickness of 300 micrometers to prepare a microcellular acrylic foam having excellent restoration performance.

<실시예 4><Example 4>

상기 실시예 1과 동일하게 진행하되, 콤마코팅방식으로 400 마이크로미터의 두께로 도포하여 복원성능이 우수한 마이크로셀 아크릴폼을 제조하였다.
The procedure of Example 1 was followed by coating with a comma coating method at a thickness of 400 micrometers to prepare a microcellular acrylic foam having excellent restoration performance.

<실시예 5>&Lt; Example 5 >

상기 실시예 1과 동일하게 진행하되, 콤마코팅방식으로 500 마이크로미터의 두께로 도포하여 복원성능이 우수한 마이크로셀 아크릴폼을 제조하였다.
The procedure of Example 1 was followed except that the microcapsular acrylic foam was coated with a comma coating method to a thickness of 500 micrometers to produce a microcellular acrylic foam having excellent restoration performance.

<실시예 6>&Lt; Example 6 >

상기 실시예 1과 동일하게 진행하되, 콤마코팅방식으로 600 마이크로미터의 두께로 도포하여 복원성능이 우수한 마이크로셀 아크릴폼을 제조하였다.
The procedure of Example 1 was followed by coating with a comma coating method at a thickness of 600 micrometers to prepare microcellular acrylic foam having excellent restoration performance.

<실시예 7>&Lt; Example 7 >

상기 실시예 1과 동일하게 진행하되, 콤마코팅방식으로 800 마이크로미터의 두께로 도포하여 복원성능이 우수한 마이크로셀 아크릴폼을 제조하였다.
The procedure of Example 1 was followed by coating with a comma coating method at a thickness of 800 micrometers to prepare a microcellular acrylic foam having excellent restoration performance.

<실시예 8>&Lt; Example 8 >

상기 실시예 1과 동일하게 진행하되, 콤마코팅방식으로 1000 마이크로미터의 두께로 도포하여 복원성능이 우수한 마이크로셀 아크릴폼을 제조하였다.
The procedure of Example 1 was followed by coating with a comma coating method at a thickness of 1000 micrometers to prepare a microcellular acrylic foam having excellent restoration performance.

상기 실시예 1을 통해 제조된 복원성능이 우수한 마이크로셀 아크릴폼의 단면을 SEM(Scanning Electron Microscope)으로 촬영하여 아래 도 2 내지 3에 나타내었다.Sectional view of a microcellular acrylic foam having excellent restoration performance prepared in Example 1 was taken by SEM (Scanning Electron Microscope) and shown in FIGS. 2 to 3 below.

아래 도 2 내지 3에 나타낸 것처럼, 개시된 실시예 1을 통해 제조된 아크릴폼은 100㎛ 미만의 오픈셀이 균일한 크기로 분포되어 있는 것을 알 수 있다.
As shown in FIGS. 2 and 3, the acrylic foam prepared in Example 1 has open cells of less than 100 μm in a uniform size distribution.

상기 실시예 1 내지 8을 통해 제조된 복원성능이 우수한 마이크로셀 아크릴폼의 복원력을 측정하여 아래 표 1에 나타내었다.Table 1 below shows the restoring force of the microcellular acrylic foam obtained through Examples 1 to 8 having excellent restoration performance.

{단, 복원력은 ((초기두께-복원두께)/초기두께)×100으로 복원률을 계산하는 방법을 이용하였다.}
(However, the restoring force was calculated by ((initial thickness - restoration thickness) / initial thickness) × 100.

<표 1><Table 1>

Figure pat00001
Figure pat00001

위에 표 1에 나타낸 것처럼, 개시된 실시예 1 내지 8을 통해 제조된 아크릴폼은 마이크로셀이 균일한 크기로 분포하며, 우수한 복원력을 나타내는 것을 알 수 있다. 특히, 코팅두께가 600 마이크로미터를 초과하는 경우에는 복원력이 매우 우수한 것을 알 수 있다.As shown in Table 1 above, it can be seen that the acrylic foam prepared through Examples 1 to 8 disclosed in the above is distributed in a uniform size and exhibits excellent restoring force. Particularly, when the coating thickness exceeds 600 micrometers, it can be seen that the restoring force is very excellent.

따라서, 개시된 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법은 무용제형으로 친환경적이며, 균일한 크기의 마이크로셀이 형성되어 얇게 성형하더라도 우수한 복원력을 나타내는 아크릴폼을 제공한다.
Accordingly, the method of manufacturing a microcellular acrylic foam having excellent restoration performance is an environmentally-friendly, non-solventable, and uniformly sized microcell is formed to provide an acrylic foam that exhibits excellent restoring force even when it is thinly molded.

S101 ; 원료혼합단계
S103 ; 발포단계
S105 ; 코팅단계
S107 ; 열처리단계
S109 ; 숙성단계S101; Raw material mixing step
S103; Foaming step
S105; Coating step
S107; Heat treatment step
S109; Aging stage

Claims (5)

아크릴수지, 발포제, 실리카분말 및 경화제를 혼합하는 원료혼합단계;
상기 원료혼합단계를 통해 제조된 혼합물을 기계식 교반기로 발포하는 발포단계;
상기 발포단계를 통해 발포된 발포물을 필름에 코팅하는 코팅단계;
상기 코팅단계를 통해 코팅된 발포물을 가열하는 열처리단계; 및
상기 열처리단계를 통해 경화된 발포물을 숙성하는 숙성단계;로 이루어지는 것을 특징으로 하는 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법.
A raw material mixing step of mixing an acrylic resin, a foaming agent, a silica powder and a curing agent;
A foaming step of foaming the mixture prepared through the raw material mixing step with a mechanical stirrer;
A coating step of coating a foamed material foamed through the foaming step onto a film;
A heat treatment step of heating the coated foam through the coating step; And
And an aging step of aging the cured foamed product through the heat treatment step. The method for producing a microcellular acrylic foam according to claim 1,
청구항 1에 있어서,
상기 원료혼합단계는 아크릴수지 100 중량부, 발포제 2 내지 5 중량부, 실리카분말 1.5 내지 2.5 중량부 및 경화제 2 내지 4 중량부로 이루어지는 것을 특징으로 하는 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법.
The method according to claim 1,
Wherein the raw material mixing step comprises 100 parts by weight of an acrylic resin, 2 to 5 parts by weight of a foaming agent, 1.5 to 2.5 parts by weight of a silica powder, and 2 to 4 parts by weight of a curing agent.
청구항 1에 있어서,
상기 발포단계는 35 내지 45℃의 온도에서 1000 내지 3000rpm의 속도로 30 내지 50분 동안 이루어지는 것을 특징으로 하는 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법.
The method according to claim 1,
Wherein the foaming step is performed at a temperature of 35 to 45 DEG C at a speed of 1000 to 3000 rpm for 30 to 50 minutes.
청구항 1에 있어서,
상기 열처리단계는 60℃에서 150℃까지 45초에 30℃도씩 승온시킨 후에 150℃의 온도에서 40 내지 50초 동안 가열하여 이루어지는 것을 특징으로 하는 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법.
The method according to claim 1,
Wherein the heat treatment step is performed by increasing the temperature from 60 ° C to 150 ° C in 45 seconds by 30 ° C and then heating the microcrystalline cellulose at 150 ° C for 40 to 50 seconds.
청구항 1에 있어서,
상기 숙성공정은 55 내지 65℃의 온도에서 70 내지 75시간 동안 이루어지는 것을 특징으로 하는 복원성능이 우수한 마이크로셀 아크릴폼의 제조방법.The method according to claim 1,
Wherein the aging step is performed at a temperature of 55 to 65 DEG C for 70 to 75 hours.
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