KR20000012738A - The manufacturing method of the embossed and foamed resin - Google Patents

The manufacturing method of the embossed and foamed resin Download PDF

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Publication number
KR20000012738A
KR20000012738A KR1019990060303A KR19990060303A KR20000012738A KR 20000012738 A KR20000012738 A KR 20000012738A KR 1019990060303 A KR1019990060303 A KR 1019990060303A KR 19990060303 A KR19990060303 A KR 19990060303A KR 20000012738 A KR20000012738 A KR 20000012738A
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KR
South Korea
Prior art keywords
resin
foamed resin
embossing
embossed
impact
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KR1019990060303A
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Korean (ko)
Inventor
윤관옥
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윤관옥
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Priority to KR1019990060303A priority Critical patent/KR20000012738A/en
Publication of KR20000012738A publication Critical patent/KR20000012738A/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/56—After-treatment of articles, e.g. for altering the shape
    • B29C44/5627—After-treatment of articles, e.g. for altering the shape by mechanical deformation, e.g. crushing, embossing, stretching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2025/00—Use of polymers of vinyl-aromatic compounds or derivatives thereof as moulding material
    • B29K2025/04—Polymers of styrene
    • B29K2025/06—PS, i.e. polystyrene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7138—Shock absorbing

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Building Environments (AREA)

Abstract

PURPOSE: A manufacturing method of an embossing processed foaming resin is provided to endure any impact and be hardly broken by having an excellent impact absorbing property as embossing-processing the external of foam resin used as a product packing material. CONSTITUTION: The method has the steps of: molding standard foam resin by adding a foaming agent to synthesized resin such as polyethylene resin and polyurethane resin; cutting the molded foam resin to fit a usage; and embossing-processing any one face of the foam resin external. Like this, since processing the external of foam resin by an embossing method, the foam resin can endure any impact and be hardly broken so the foam resin can increase sound absorbing and sound intercepting effect or insulating effect, and can minimize damage caused by outer impact.

Description

엠보싱가공된 발포수지의 제조방법{The manufacturing method of the embossed and foamed resin}The manufacturing method of the embossed and foamed resin

본 발명은 발포수지에 관한 것으로, 더욱 상세하게는 건축공사시 또는 가정에서 단열, 흡음, 완충 등을 위해 건축내,외벽 또는 바닥면에 설치되거나, 제품 포장재로 사용되는 발포수지의 외면을 엠보싱 처리하므로서, 충격흡수가 뛰어나 어떤 충격에도 견딜 수 있고 쉽게 파손되지 않는 엠보싱 가공된 발포수지의 제조방법에 관한 것이다.The present invention relates to a foamed resin, and more particularly, to embossing the outer surface of the foamed resin used in the building, the outer wall or floor surface, or used as a product packaging material for thermal insulation, sound absorption, cushioning, etc. in construction or home. Therefore, the present invention relates to a method for producing an embossed foamed resin which is excellent in shock absorption and able to withstand any impact and is not easily broken.

일반적으로 스티로플 폼이라 칭하여지는 발포수지는 폴리스티렌 수지, 폴리우레탄수지 등의 합성수지에 발포제를 첨가하여 형성한 것으로서 성형가공이 용이하고 대량생산에 적합하며 흡음 및 단열효과가 우수하여 건축공사시 또는 제품 포장시에 단열재 또는 완충재, 포장재 등으로 널리 사용되고 있는 것은 주지된 사실이다.Foamed resin, commonly called styrofoam foam, is formed by adding foaming agent to synthetic resin such as polystyrene resin and polyurethane resin. It is easy to process and suitable for mass production and has excellent sound absorption and insulation effect. It is well-known that it is widely used as a heat insulating material, a buffer material, a packaging material, etc. at the time of packaging.

그러나, 이와같은 종래의 발포수지는 대량생산에 적합하고, 흡음 및 단열효과가 우수한 장점이 있는 반면, 그 강도가 매우 약하여 사용시 또는 운반시 작은 충격에도 쉽게 부서지는 등의 파손이 발생하여 그 사용이 불편하게 되었다.However, while the conventional foamed resin is suitable for mass production and has an advantage of excellent sound absorption and heat insulation effect, its strength is so weak that breakage such as breakage occurs easily during use or small impact during transportation. I became uncomfortable.

예를 들어, 발포수지를 건축공사시 건물의 단열을 위한 단열재로 사용하였을 경우, 먼저 사각형의 큰 판자형태로 성형제조되는 발포수지를 사용용도에 맞는 크기로 다수 절단한 다음, 건물 내,외벽이나 바닥면에 위치시켜 접착제 등으로 고정시키고 그 외면을 모르타르 등으로 마감처리하여 사용하게 되는 데. 이와 같이 발포수지를 부착하는 부착과정 또는 모르타르를 이용한 마감공정에서 발포수지의 단부 또는 일부가 파손되는 일이 발생하였으며, 이로인해 결합되는 발포수지의 사이에 틈새가 발생되는 문제점이 발생하였다.For example, when foamed resin is used as a heat insulating material for the insulation of a building during construction, first, a large number of foamed resins molded and manufactured in a rectangular large plank shape are cut into sizes suitable for the intended use, and then inside or outside walls of buildings It is placed on the bottom and fixed with adhesive, etc. and the outside is finished with mortar. As such, the end or part of the foamed resin may be damaged in the attaching process of attaching the foamed resin or in the finishing process using mortar, thereby causing a gap between the foamed resins to be bonded.

이와같이, 건물내,외벽 또는 바닥면에 결합되는 발포수지 사이에서 발생되는 틈새사이로 열손실이 발생하여 단열효과가 떨어지게 되었으며, 또 그 틈새에 의해 흡음 및 차음효과 또한 떨어지는 등의 문제점이 발생하였다.As such, heat loss occurs between the gaps generated between the foamed resin bonded to the inner wall, the outer wall, or the bottom of the building, so that the heat insulation effect is reduced, and the sound absorption and sound insulation effects are also lowered by the gap.

또, 이와 같은 틈새때문에 마감작업으로 모르타르를 도포할 때 모르타르의 균일한 도포가 불가능하였으며, 사용도중 그 틈새부분이 쉽게 꺼지는 등의 현상이 발생하여 하자보수를 필요로 하게 되었으며, 이에따라 추가비용이 소요되게 되었다.In addition, due to such gaps, it was impossible to apply the mortar uniformly when applying the mortar to the finishing work, and the gap occurred easily during the use, which caused the defects to be repaired, which required additional cost. It became.

또한, 상기 발포수지를 제품 포장을 위한 포장재나 완충재로 사용할 경우, 제품운반시 제품에 가해지는 충격 또는 흔들림으로부터 포장된 제품을 보호하기 위하여 포장박스 내면에 사용되게 되는 데, 이 또한 포장재 또는 완충재로 사용되는 발포수지가 작은 충격에도 쉽게 파손되므로서, 외부충격으로부터 제품을 보호하는 완충재 본연의 임무를 다하지 못하였을 뿐만 아니라, 이러한 경우 파손부위 등에서 제품외관에 흠집이 발생하게 되었으며, 심한 경우에는 제품을 사용할 수 없는 정도의 손상을 입게 되는 경우도 발생하였다.In addition, when the foamed resin is used as a packaging material or a cushioning material for product packaging, the foamed resin is used on the inner surface of the packaging box to protect the packaged product from impact or shaking applied to the product during transportation. As the foamed resin used is easily damaged by small impacts, it was not able to fulfill its duty as a shock absorber that protects the product from external shocks.In this case, the exterior of the product was scratched. There was also a case where damage to an unusable degree occurred.

이러한 현상은 취급시 주의를 요하는 전자제품의 경우 약간의 충격에도 내부회로에 이상이 발생되게 되므로 그 문제점이 더욱 심하게 나타나게 되었다.This phenomenon occurs more seriously in the electronic circuit that requires attention when handling because the abnormality occurs in the internal circuit even with a slight impact.

따라서 본 발명은 상기한 종래의 문제점을 해결하기 위한 것으로, 본 발명의 주된 목적으로는 건축공사시 단열, 흡음, 완충 등을 위해 건축내,외벽 또는 바닥면에 설치되거나, 제품 포장재로 사용되는 발포수지의 외면을 엠보싱처리하므로서, 충격흡수가 뛰어나 어떤 충격에도 견딜 수 있고 쉽게 파손되지 않는 엠보싱가공된 발포수지의 제조방법를 제공하기 위한 것이다.Therefore, the present invention is to solve the above-mentioned conventional problems, the main object of the present invention is to be installed in the interior, exterior walls or floors for building insulation, sound absorption, cushioning, etc. during construction, or used as a product packaging material By embossing the outer surface of the resin, to provide a method for producing an embossed foamed resin excellent in shock absorption, withstands any impact and not easily broken.

도 1은 본 발명에 따른 엠보싱 가공의 단계를 보인 계통도.1 is a schematic diagram showing a step of embossing according to the present invention.

도 2a는 본 발명에 따른 엠보싱 가공의 실시예를 보인 단면도.Figure 2a is a cross-sectional view showing an embodiment of the embossing process according to the present invention.

도 2b는 본 발명에 따른 엠보싱 가공의 다른 실시예를 보인 단면도.Figure 2b is a sectional view showing another embodiment of the embossing process according to the present invention.

*도면의 주요부분에 대한 부호의 설명** Description of the symbols for the main parts of the drawings *

10 ; 발포수지11 ; 성형판10; Foamed resin 11; Molding plate

12 ; 지지대13 ; 성형로울러12; Support 13; Molding Roller

14 ; 지지로울러15 ; 이형제공급로울러14; Support roller 15; Release agent supply roller

16 ; 이형제공급통16; Release Agent Supply Container

상기 목적을 달성하기 위한 본 발명은The present invention for achieving the above object

폴리스티렌 수지, 폴리우레탄수지 등의 합성수지에 발포제를 첨가하여 규격의 발포수지를 성형하는 발포수지 성형단계와, 규격으로 성형제조되는 발포수지를 사용용도에 맞게 절단하는 절단단계를 통해 제조되는 발포수지의 제조공정에 있어서,The foamed resin is manufactured through a foaming resin molding step of forming a foamed resin of a standard by adding a foaming agent to a synthetic resin such as polystyrene resin and polyurethane resin, and a cutting step of cutting the foamed resin molded and manufactured according to a standard for use. In the manufacturing process,

성형제조되는 상기 발포수지 외면의 어느 한 면을 엠보싱 가공하는 단계를 거쳐 제조된다.It is manufactured through a step of embossing any one side of the foamed resin outer surface to be molded.

즉, 발포수지의 외면을 엠보싱처리를 형성하므로서, 충격흡수가 뛰어나 어떤 충격에도 견딜 수 있고 쉽게 파손되지 않게 된다.That is, by forming an embossing treatment on the outer surface of the foamed resin, it is excellent in shock absorption and can withstand any impact and is not easily broken.

이러한, 본 발명을 첨부된 도면에 의거하여 상세히 설명하면 다음과 같다.Such, when described in detail with reference to the accompanying drawings of the present invention.

도 1은 본 발명에 따른 엠보싱 가공의 단계를 보인 공정도이고,1 is a process chart showing a step of embossing according to the present invention,

도 2a는 본 발명에 따른 엠보싱 가공의 실시예를 보인 단면도이며.Figure 2a is a cross-sectional view showing an embodiment of the embossing process according to the present invention.

도 2b는 본 발명에 따른 엠보싱 가공의 다른 실시예를 보인 단면도이다.Figure 2b is a cross-sectional view showing another embodiment of the embossing process according to the present invention.

본 발명에 따른 엠보싱 가공된 발포수지는 폴리스티렌 수지, 폴리우레탄수지 등의 합성수지에 발포제를 첨가하여 성형되는 발포수지(10)의 외면을 엠보싱 가공하여서 되는 것으로, 이와같은 발포수지의 표면을 엠보싱 가공하여서 된 발포수지(10')의 실시예는 다음과 같다.The embossed foamed resin according to the present invention is obtained by embossing the outer surface of the foamed resin 10 formed by adding a foaming agent to a synthetic resin such as polystyrene resin or polyurethane resin, and by embossing the surface of such foamed resin. An embodiment of the foamed resin 10 'is as follows.

《실시예 1》<< Example 1 >>

본 실시예는 발포수지의 상부면에 성형판을 가압하여 엠보싱 가공하는 방법으로서, 이와같은 성형판을 이용한 엠보싱 가공방법은 도 2a에 도시된 바와같이, 지지대(12)의 상부에서 가압하여 성형가공할 수 있도록 하단부에 다수의 엠보싱 돌기(11')가 형성되는 성형판(11)을 설치하되, 상기 돌기(11') 내부에는 가열원을 설치하여서 된 성형장치를 구비한 다음, 폴리스티렌 수지, 폴리우레탄수지 등의 합성수지에 발포제를 첨가하여 규격의 발포수지를 성형하고, 발포수지를 사용용도에 맞게 절단하는 과정을 거쳐 제조되는 발포수지(10)를 상기 지지대(12)상에 위치시킨 후, 그 상부에서 성형판(11)을 이용하여 가압하게 되면, 발포수지의 어느 한 면이 엠보싱 가공된 발포수지(10')를 성형 제조할 수 있게 된다.The present embodiment is a method for embossing by pressing the forming plate on the upper surface of the foamed resin, the embossing processing method using such a forming plate, as shown in Figure 2a, by pressing on the upper portion of the support 12, forming A molding plate 11 having a plurality of embossing protrusions 11 'is formed at a lower end thereof so as to be formed, and a molding apparatus provided with a heating source is provided inside the protrusions 11', and then polystyrene resin, poly After the foaming agent is added to the synthetic resin such as urethane resin, the foamed resin of the standard is molded, and the foamed resin 10 manufactured by cutting the foamed resin according to the intended use is placed on the support 12. When pressurized using the forming plate 11 in the upper portion, any one side of the foamed resin can be manufactured by molding the embossed foamed resin (10 ').

《실시예 2》<< Example 2 >>

본 실시예는 발포수지 외면의 어느 한 면에 성형로울러를 이용하여 엠보싱 가공하는 방법으로서, 이와같은 성형로울러를 이용한 엠보싱 가공방법은 도 2b에 도시된 바와같이, 표면에 다수의 엠보싱 돌기(13')가 형성되는 성형로울러(13)와 그 성형로울러(13)를 지지하기 위한 지지로울러(14)를 서로 연동되게 설치하고, 상기 성형로울러(13)의 표면에 형성되는 엠보싱 돌기(13')의 내부에는 가열원을 설치하여서 된 성형장치를 구비한 다음, 폴리스티렌 수지, 폴리우레탄수지 등의 합성수지에 발포제를 첨가하여 규격의 발포수지를 성형하고, 발포수지를 사용용도에 맞게 절단하는 과정을 거쳐 제조되는 발포수지(10)를 성형로울러(13)와 지지로울러(14) 사이를 통과토록 하면 발포수지의 어느 한 면이 엠보싱 가공된 발포수지(10')를 성형 제조할 수 있게 된다.The present embodiment is a method of embossing using a molding roller on one side of the outer surface of the foamed resin, the embossing processing method using such a molding roller, as shown in Figure 2b, a plurality of embossing projection (13 ') on the surface Of the embossing protrusion 13 'formed on the surface of the forming roller 13 by installing the forming roller 13 and the supporting roller 14 for supporting the forming roller 13 interlocked with each other. It is equipped with a molding apparatus installed by heating source inside, and then foaming agent is added to synthetic resin such as polystyrene resin, polyurethane resin, etc. to form foamed resin of standard, and manufactured by cutting foamed resin according to usage. When the foamed resin 10 is passed between the forming roller 13 and the support roller 14, any one side of the foamed resin can be molded and manufactured by embossing the foamed resin 10 '.

이때, 상기 성형로울러(13)를 이용하여 발포수지(10)에 엠보싱 가공시 가열된 성형로울러(13)의 돌기(13')부분에 발포수지(10)가 달라붙게 되는 것으로 이를 방지하기 위하여 성형로울러(13)의 하단에 이형제공급통(16)을 설치하고, 그 상부에 성형로울러(13)에 이형제를 도포하기위한 이형제공급로울러(15)를 설치하여 성형로울러(13)와 연동되도록 한다.At this time, when the embossing process to the foamed resin 10 by using the molding roller 13, the foamed resin 10 is attached to the protrusion 13 'portion of the heated molding roller 13 to prevent the molding A release agent supply barrel 16 is installed at the lower end of the roller 13, and a release agent supply roller 15 for applying a release agent to the forming roller 13 is installed at the upper portion thereof so as to interlock with the forming roller 13.

이와 같은 방법으로 엠보싱 가공된 발포수지(10')를 건축공사시 건물의 단열을 위한 단열재로 사용할 경우, 발포수지(10')를 건물 내,외벽이나 바닥면에 위치시켜 접착제 등으로 고정시키고 그 외면을 모르타르 등으로 마감처리하여 사용하게 될 때, 엠보싱 가공된 발포수지(10')가 쉽게 파손되지 않게 되므로서, 모르타르를 균일하게 도포할 수 있으며, 이에 따라 열손실을 최소화하여 단열효과를 향상시킬 수 있음은 물론, 특히 흡음효과 및 차음효과를 크게 향상시킬 수 있게 된다.In this way, when the embossed foamed resin 10 'is used as an insulating material for the insulation of a building during construction, the foamed resin 10' is placed on an inner wall or an outer wall of a building and fixed with an adhesive, and the like. When the outer surface is finished with mortar, etc., the embossed foamed resin 10 'is not easily damaged, so that mortar can be uniformly applied, thereby minimizing heat loss, thereby improving thermal insulation effect. Of course, the sound absorption effect and the sound insulation effect can be greatly improved.

또한, 상기 엠보싱 가공된 발포수지(10')를 제품운반시 제품에 가해지는 충격 또는 흔들림으로부터 포장된 제품을 보호하기 위한 포장재나 완충재로 사용할 경우, 엠보싱 가공된 발포수지(10')가 쉽게 파손되지 않게 되므로서, 제품 적재시 또는 운반시 제품에 가해지는 외부충격으로부터 제품의 피해를 최소화할 수 있게 된다.In addition, when the embossed foamed resin 10 'is used as a packaging material or a cushioning material for protecting the packaged product from impact or shaking applied to the product during transportation, the embossed foamed resin 10' is easily broken. It is possible to minimize the damage of the product from the external impact on the product during loading or transportation of the product.

이상에서와 같이, 본 발명은 발포수지의 외면을 엠보싱 가공하므로서, 어떤 충격에도 견딜 수 있고 쉽게 파손되지 않아 건축공사에 사용시 단열효과 또는 흡음 및 차음효과를 향상시킬 수 있게 됨은 물론, 제품포장에 사용시 제품에 가해지는 외부충격으로부터 제품의 피해를 최소화할 수 있는 것이다.As described above, the present invention by embossing the outer surface of the foamed resin, it can withstand any impact and is not easily broken to improve the insulation effect or sound absorption and sound insulation effect when used in building construction, of course, when used in product packaging It is possible to minimize the damage of the product from external shocks to the product.

Claims (3)

폴리스티렌 수지, 폴리우레탄수지 등의 합성수지에 발포제를 첨가하여 규격의 발포수지를 성형하는 발포수지 성형단계(S1)와, 규격으로 성형제조되는 발포수지를 사용용도에 맞게 절단하는 절단단계(S2)를 통해 제조되는 발포수지의 제조방법에 있어서,Foaming resin molding step (S1) for forming a foamed resin of the standard by adding a foaming agent to a synthetic resin such as polystyrene resin, polyurethane resin, and the cutting step (S2) for cutting the foamed resin molded and manufactured according to the standard In the manufacturing method of the foamed resin produced through 성형제조되는 상기 발포수지 외면의 어느 한 면을 엠보싱 가공하는 단계(S3)를 거쳐서 제조된 것을 특징으로 하는 엠보싱가공된 발포수지의 제조방법Method for producing an embossed foamed resin, characterized in that manufactured through the step (S3) of embossing any one surface of the foamed resin outer surface to be manufactured 제 1항에 있어서, 상기 엠보싱 가공은 발포수지(10)를 지지대(12)상에 위치시키고, 그 상부에서 하단부에 다수의 엠보싱 돌기(11')가 형성되는 성형판(11)을 이용하여 발포수지(10)의 상부면을 가압하여 제조된 것을 특징으로 하는 엠보싱가공된 발포수지의 제조방법.2. The embossing process according to claim 1, wherein the embossing process is carried out by placing the foamed resin 10 on the support 12, and foaming using the forming plate 11 having a plurality of embossed projections 11 'formed at the lower end thereof. Method for producing an embossed foamed resin, characterized in that produced by pressing the upper surface of the resin (10). 제 1항에 있어서, 상기 엠보싱 가공은 발포수지를 표면에 다수의 엠보싱 돌기(13')가 형성되는 성형로울러(13)와 그 성형로울러(13)를 지지하기 위한 지지로울러(14)사이를 통과시켜 엠보싱가공하여 제조된 것을 특징으로 하는 엠보싱 가공된 발포수지의 제조방법.2. The embossing process according to claim 1, wherein the embossing passes between the forming roller (13) having a plurality of embossing protrusions (13 ') formed on the surface of the foamed resin and the supporting roller (14) for supporting the forming roller (13). Method for producing an embossed foamed resin, characterized in that produced by embossing.
KR1019990060303A 1999-12-22 1999-12-22 The manufacturing method of the embossed and foamed resin KR20000012738A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020024254A (en) * 2002-02-14 2002-03-29 박부생 Air cushion layer containing Elastic polystyrene based disk manufacturing process
KR100742649B1 (en) 2006-05-11 2007-07-25 오동하 Apparatus for forming groove on expandable polystyrene sheet
KR101043501B1 (en) * 2009-07-29 2011-06-23 최기영 Shock-absorbing member

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020024254A (en) * 2002-02-14 2002-03-29 박부생 Air cushion layer containing Elastic polystyrene based disk manufacturing process
KR100742649B1 (en) 2006-05-11 2007-07-25 오동하 Apparatus for forming groove on expandable polystyrene sheet
KR101043501B1 (en) * 2009-07-29 2011-06-23 최기영 Shock-absorbing member

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