KR20190012459A - the method of hypodensity foaming film for single axis elongation - Google Patents
the method of hypodensity foaming film for single axis elongation Download PDFInfo
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- KR20190012459A KR20190012459A KR1020170095452A KR20170095452A KR20190012459A KR 20190012459 A KR20190012459 A KR 20190012459A KR 1020170095452 A KR1020170095452 A KR 1020170095452A KR 20170095452 A KR20170095452 A KR 20170095452A KR 20190012459 A KR20190012459 A KR 20190012459A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
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- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
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- 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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
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- 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/0081—After-treatment of articles without altering their shape; Apparatus therefor using an electric field, e.g. for electrostatic charging
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- 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
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
- B29K2105/048—Expandable particles, beads or granules
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
본 발명은 완충, 내열, 단열 성능을 보유하며 내부 기포 셀과 두께가 균질하고, 평활도가 우수한 저밀도 고발포 종축연신 필름의 제조 방법에 관한 것이다.The present invention relates to a process for producing a low-density, highly stretched longitudinally stretched film having excellent shock resistance, heat resistance and heat insulation performance, uniform thickness with the inner bubble cell, and excellent smoothness.
화장품 용기나 의약 병 등에 내용물이 새지 않도록 막아주기 위한 캡 실링용 필름을 사용하고 있다.The film for cap sealing is used to prevent contents from leaking into cosmetic containers or medicine bottles.
현재 통용되는 저밀도 고발포 필름은 무연신 발포 필름으로 일반 고주파용 실링 필름이나 일부 보온용 포장재로 활용함에 있어, 내부 에어셀 구조가 균일하지 않고 표면 또한 거칠고 평활치 않아 합지 과정(드라이라미네이팅)에서 작업시간이 지체되고 합지를 해도 표면에 구겨짐이 발생하여 불량률이 높고 소비자의 불만족을 초래하고 있는 등 많은 loss를 초래하고 있다.The low-density high-foaming film, which is currently used, is a novel lead-free film that is used as a general high-frequency sealing film or as a part of heat-insulating packaging materials. The internal air cell structure is not uniform and the surface is also rough and non- The surface is wrinkled even if it is delayed, and the defect rate is high, resulting in dissatisfaction of the consumer.
한편, 대한민국 공개특허 제10-1250772호에는 발포 필름 제조 방법에 대하여 개시하고 있고, 무연신 방식으로 발포 필름을 제조하고 있으나 무연신 방식을 적용함에 따라 발포 필름 내부에 에어 셀 및 두께가 균일하지 못해 발포 필름을 부품으로 활용하여 생산되는 제2, 제3의 제품에 주름이 발생하는 문제가 대두되어 캡 실링 용도로는 치명적인 결함이 되고 있어 내부 기포셀과 두께의 균질성이 확보되고, 본 부품을 활용한 제2, 제3 제품의 품질을 향상시키는 효과를 달성할 수 있는 저밀도 고발포 종축연신 필름의 제조 기술에 대한 필요성을 인식하였다.Korean Patent Laid-Open Publication No. 10-1250772 discloses a method for producing a foamed film, and although a foamed film is produced in a non-stretched manner, the air cells and the thickness of the foamed film are not uniform There is a problem that wrinkles occur in the second and third products produced by using the foam film as a part, which is a fatal defect in the use of the cap sealing, ensuring homogeneity of the inner bubble cell and thickness, A need has arisen for a technique for producing a low-density, high-elongation, longitudinally stretched film capable of achieving an effect of improving the quality of a second and a third product.
본 발명자는 완충, 내열, 단열 성능을 보유하고 있으며 내부 기포 셀 및 두께가 균질하고, 평활도가 우수한 저밀도 고발포 종축연신 필름을 개발하고자 노력하였다. 그 결과, 폴리프로필렌 수지, 저밀도 폴리에틸렌 수지, 선형 저밀도 폴리에틸렌 수지 및 첨가제를 특정 배합비로 혼합하고, 특정 온도, 속도, 제1, 제2, 제3 롤라 등의 속도 차이를 활용한 연신율 변화 등 관련 조건을 조절할 수 있는 종축 연신 압출기를 활용하여 목적에 적합한 저밀도 고발포 종축연신 필름을 제조한 결과, 기존 제품들에 비해 내부기포 셀 및 두께의 균질성이 우수한 저밀도 고발포 종축연신 필름을 획득함으로써, 본 발명을 완성하였다.The present inventors have sought to develop a low-density, high-boehmite longitudinally stretched film having a buffering, heat resistance, and heat insulating performance, an inner bubble cell and a uniform thickness and an excellent smoothness. As a result, the polypropylene resin, the low-density polyethylene resin, the linear low-density polyethylene resin and the additive are mixed at a specific blending ratio, and the specific conditions such as the change in elongation at a specific temperature, speed, The present inventors have succeeded in obtaining a low density and high longitudinal stretching film having excellent inner cell thickness and homogeneity of thickness compared with the conventional products. As a result, .
따라서, 본 발명의 목적은 내부 에어 셀 및 두께의 균질성 등 품질이 우수한 저밀도 고발포 종축 연신 필름의 제조 방법을 제공하는데 있다.Accordingly, an object of the present invention is to provide a method for producing an inner air cell and a low-density, high-elongation, longitudinally stretched film excellent in quality such as uniformity in thickness.
본 발명의 일 양태에 따르면, 본 발명은 다음 단계를 포함하는 저밀도 고발포 종축 연신 필름의 제조 방법을 제공한다: (a) 폴리프로필렌 수지, 저밀도 폴리에틸렌 수지, 선형 저밀도 폴리에틸렌 수지, 발포제, 불소계 첨가제 및 백색 안료를 일정한 혼합비율로 혼합하는 단계; (b) 상기 단계 (a)의 결과물이 압출되는 단계; (c) 상기 단계 (b)의 결과물을 수온 20-34℃의 냉각 수조에서 냉각시키는 단계; (d) 상기 단계 (c)의 결과물을 10-30 m/min의 속도로 끌어올리는 단계; (e) 상기 단계 (d) 결과물의 내부 에어 셀 및 두께를 균질하게 제조하기 위해 설정된 온도로 가열된 제1, 제2, 제3 롤라의 회전속도 차이를 조절하여 종축으로 연신하는 종축 연신 단계; (f) 상기 단계 (e) 결과물에 평활도를 높이기 위하여 설정된 온도로 가열된 제1, 제2, 제3 폴리싱 롤라로 저밀도 고발포 종축연신 필름 표면을 폴리싱하는 폴리싱 단계; (g) 상기 단계 (f)의 결과물에 직류(DC) 6-10 암페어(A)의 전류로 코로나(corona) 처리하는 단계; 및 (h) 상기 단계 (g)의 결과물을 냉각시키는 단계.According to one aspect of the present invention, the present invention provides a process for producing a low density, high yield, longitudinal stretched film comprising the steps of: (a) mixing a polypropylene resin, a low density polyethylene resin, a linear low density polyethylene resin, a foaming agent, Mixing the white pigment at a constant mixing ratio; (b) extruding the result of step (a); (c) cooling the result of step (b) in a cooling water bath at a water temperature of 20-34 ° C; (d) raising the result of step (c) at a rate of 10-30 m / min; (e) a vertical axis extending step (d) by adjusting the rotation speed difference between the first, second and third rollers heated to a predetermined temperature so as to uniformly produce the inner air cell and the thickness of the resultant product, (f) a polishing step of polishing the surface of the low-density highly-deformed longitudinally stretched film with first, second and third polishing rolls heated to a predetermined temperature to increase smoothness in the step (e); (g) subjecting the result of step (f) to corona treatment with a current of DC 6-10 amperes (A); And (h) cooling the result of step (g).
상기의 (a) 단계부터 (h)단계의 공정을 통하여 완충, 내열, 단열 성능을 보유하고 내부 기포 셀 및 두께가 균질하고 평활도가 우수한 저밀도 고발포 종축 연신 필름을 개발했고, 본 부품을 활용한 제2, 제3 제품의 품질을 향상시키는 효과를 달성하였다.Through the above steps (a) to (h), we have developed a low-density, high-stretch longitudinal stretch film with buffering, heat-resistance, and thermal insulation properties and an inner bubble cell and uniform thickness and smoothness. Thereby achieving the effect of improving the quality of the second and third products.
본 발명의 효과를 요약하면 다음과 같다:The effects of the present invention are summarized as follows:
완충, 내열, 단열 성능을 보유하고 내부 기포 셀 및 두께가 균질하고, 평활도가 우수한 저밀도 고발포 종축연신 필름을 개발함으로써, 본 부품을 활용한 제2, 제3 제품의 품질을 향상시키는 효과를 달성하였다.By developing a low-density high-elongation longitudinal stretched film with buffer, heat, and heat insulation performance and a uniform inner bubble cell thickness and excellent smoothness, the effect of improving the quality of the second and third products utilizing this component is achieved Respectively.
이하, 저밀도 고발포 종축 연신 필름을 제조하기 위한 본 발명의 방법을 상세히 설명하면 다음과 같다:Hereinafter, the method of the present invention for producing a low-density highly stretched longitudinally stretched film will be described in detail as follows:
(a) 폴리프로필렌 수지, 저밀도 폴리에틸렌 수지, 선형 저밀도 폴리에틸렌 수지, 발포제, 첨가제 및 안료를 혼합하는 단계를 거친다.(a) mixing a polypropylene resin, a low-density polyethylene resin, a linear low-density polyethylene resin, a foaming agent, an additive and a pigment.
상기 혼합은 당 업계에 공지된 다양한 혼합비율을 적용하여 실시할 수 있고, 다양한 믹서기를 이용하여 약 60분 정도 실행한다.The mixing can be carried out by applying various mixing ratios known in the art and is carried out using various mixers for about 60 minutes.
(b) 압출기를 이용하여 상기 단계 (a)의 결과물을 압출기를 이용하여 압출하는 단계를 거친다.(b) extruding the result of step (a) using an extruder using an extruder.
상기 압출공정에서 적정 온도를 유지함으로써, 압출 과정에서 발포제에 의한 균일한 가스(gas)가 발생되고 저밀도 고발포 종축연신 필름 내부에 기포를 함유하는 에어 셀(cell)이 균일하게 생성된다.By maintaining an appropriate temperature in the extrusion process, a uniform gas is generated by the foaming agent in the extrusion process, and an air cell containing bubbles is uniformly produced in the low density high-blown longitudinal stretched film.
(c) 냉각 수조에서 냉각은 단계 (b)의 결과물을 수온 20-34℃의 냉각 수조에서 냉각시키는 단계를 포함한다.(c) cooling in the cooling water bath comprises cooling the result of step (b) in a cooling water bath at a water temperature of 20-34 ° C.
상기 냉각은 당 업계에 공지된 다양한 방법, 예컨대, 공기 냉각 방식, 광택 롤(polishing roll) 냉각 방식 및 물 냉각 방식을 이용할 수 있으나, 본 발명에서는 물 냉각 방식을 채택하였다. 이는 저밀도 고발포 종축연신 필름 내부에 에어 셀(cell)의 균질성을 증가시켜 비중을 낮게 하고자 함이다.The cooling may be performed by various methods known in the art, for example, an air cooling method, a polishing roll cooling method, and a water cooling method. In the present invention, a water cooling method is adopted. This is to increase the homogeneity of the air cells inside the low-density high-elongated longitudinally stretched film to lower the specific gravity.
물 냉각 방식을 이용하는 데 있어, 상기 냉각 수온을 20-34℃로 채택함으로써 35℃ 이상의 냉각 수조를 이용한 예에 비해서 비중의 감소 효과가 보다 우수하였다.In adopting the water cooling method, by adopting the cooling water temperature at 20-34 캜, the effect of reducing the specific gravity was more excellent than the example using the cooling water tank of 35 캜 or more.
(d) 테이크 업은 단계 (c)의 결과물을 10-30 m/min의 속도로 끌어올리는 공정을 실시한다.(d) The take-up is carried out by raising the result of step (c) at a rate of 10-30 m / min.
본 발명의 바람직한 예에 따르면, 상기 테이크업 공정은 15-24 m/min의 속도로 냉각한 필름을 끌어올린다.According to a preferred embodiment of the present invention, the take-up process raises the cooled film at a speed of 15-24 m / min.
(e) 종축연신 공정은 상기 단계 (d)의 결과물을 종축방향으로 분자배향 시켜서 강조를 밸런스시키는 동시에 그 외의 물성을 향상시키시 위하여 유진전이점 이상 또는 융점 이하의 온도에서 종축방향으로 연신하는 것이다. 이 조작으로서 필름의 인장 강도는 매우 증대하여 강인성이 증가된다. 이런 작업조건을 조성하기 위해 설정된 온도로 가열된 제1, 제2, 제3 롤라 회전속도 차이를 조절하여 저밀도 고발포 종축연신 필름을 연신하는 단계를 포함한다.(e) In the longitudinal axis stretching step, the result of step (d) is oriented in the longitudinal direction at a temperature of not lower than the transition point of the transition point or below the melting point in order to balance the stress by molecular orientation in the longitudinal direction. As a result of this operation, the tensile strength of the film is greatly increased and the toughness is increased. And adjusting the difference in rotation speed of the first, second, and third rolls heated to a predetermined temperature to form such a working condition, thereby stretching the low density highly stretched longitudinally stretched film.
상기 종축연신 공정은 당 업계에 공지된 다양한 방법이 있는데 본 발명에서는 제1 롤라와 제2 롤라의 회전 속도비가 2:4 정도를 권장하는데 저밀도 고발포 종축연신 필름의 조도를 초, 중, 고급으로 조절하는데 회전 속도비율을 조정할 수 있다. 그리고, 연신이 용이하게 될 수 있도록 유진전이점 이상 또는 융점 이하로 회전 롤라의 온도를 90-140℃ 정도 추천하는데, 바람직한 온도는 95-135℃ 정도 유지하는 것을 권장한다. 이런 온도 범위는 작업장 주변의 대기 온도에 의하여 조정되어 진다.There are various methods known in the art for the longitudinal stretching process. In the present invention, it is recommended that the rotational speed ratio between the first rollers and the second rollers is about 2: 4. However, the illuminance of the low- You can adjust the rotation speed ratio to adjust. In order to facilitate elongation, it is recommended that the temperature of the rotating roll is 90-140 ° C or higher, preferably 95-135 ° C. This temperature range is adjusted by the ambient temperature around the work area.
(f) 폴리싱 공정은 저밀도 고발포 종축연신 필름 표면의 평활도를 유지하기 위한 단계를 포함한다.(f) The polishing process includes a step for maintaining the smoothness of the low-density highly stretched longitudinally stretched film surface.
상기 단계 (e) 결과물에 평활도를 유지하기 위하여 설정된 온도로 가열된 제1, 제2, 제3 폴리싱 롤라들로 저밀도 고발포 종축연신 필름 표면을 폴리싱함으로써 저밀도 고발포 종축연신 필름의 평활도를 유지할 수 있다.By polishing the surface of the low-density highly stretched film longitudinally stretched film with the first, second, and third polishing rollers heated to a predetermined temperature to maintain smoothness in the result of step (e), smoothness of the low-density stretched film can be maintained have.
상기 단계에서 롤라의 표면은 경면 다듬질의 경질크롬 도금을 하고 또한 버프연마 등을 한 것이 보통 사용되고 있으며, 롤라의 회전 속도는 15-24 m/min의 속도를 유지하는 것이 권장되며, 폴리싱을 할 때 효율을 높이기 위해 롤라의 온도를 90-140℃ 사이로 설정하기를 권장한다. 바람직한 설정 온도는 95-135℃ 정도를 유지하는 것이 폴리싱의 효과를 극대화하여 양호한 평활도를 유지할 수 있다.In the above step, the surface of the rollers is usually hard chrome plated with mirror finish and buffed, etc. It is recommended that the roll speed of the roller be maintained at a speed of 15-24 m / min. To increase efficiency, it is recommended to set the temperature of rollers between 90-140 ° C. A preferable setting temperature is maintained at about 95-135 DEG C to maximize the effect of polishing and to maintain good smoothness.
(g) 코로나(corona) 처리는 상기 단계 (f)의 결과물에 직류(DC) 6-10 암페어(A)의 전류로 코로나(corona) 처리하는 단계를 포함한다.(g) The corona treatment comprises corona treatment of the result of step (f) with a current of DC 6-10 amperes (A).
표면 개질, 즉 저밀도 고발포 종축연신 필름과 접착제 사이의 높은 접착력을 달성하기 위해서 코로나 처리의 물리적인 방법을 채택하였다.A physical method of corona treatment has been adopted to achieve surface modification, that is, high adhesion between the low density highly oriented longitudinally stretched film and the adhesive.
본 발명의 바람직한 예에 따르면, 상기 코로나 처리는 직류(DC)7-9 암페어(A) 전류를 적용한다.According to a preferred embodiment of the present invention, the corona treatment applies a direct current (DC) 7-9 amperes (A) current.
(h) 상기 단계 (g) 결과물의 냉각은 상기 단계 (g)의 결과물을 냉각시키는 단계를 거친다.(h) cooling of the result of step (g) is followed by cooling of the result of step (g).
본 발명의 바람직한 예에 따르면, 상기 단계 (h)의 냉각은 광택 냉각 롤(polishing cooling roll) 냉각 공정으로 실시하며, 이는 높은 전류의 코로나 처리로 필름 자체에 발생한 많은 열로 인한 필름의 수축 방지를 위해서이다.According to a preferred embodiment of the present invention, the cooling of step (h) is carried out by a polishing cooling roll cooling process, which is a high current corona treatment to prevent shrinkage of the film due to heat generated in the film itself to be.
상기 냉각은 온도 20-34℃ 조건에서 실시한다.The cooling is carried out at a temperature of 20 to 34 캜.
이러한 방법으로 실질적으로 저밀도 고발포 종축연신 필름을 제조할 수 있다.In this way, a substantially low-density highly stretched film can be produced.
본 발명의 제조 방법에 의해 제조된 저밀도 고발포 종축연신 필름은 알루미늄과 펫트 재질 필름 사이에서 중간층을 형성하며 합지과정(드라이라미네팅)을 통해 캡 실링(cap sealing)용으로 이용할 수 있고, 완충, 내열, 단열 성능이 요구되는 보호막으로 이용할 수 있다.The low-density highly stretched longitudinally stretched film produced by the production method of the present invention forms an intermediate layer between aluminum and a pet material film and can be used for cap sealing through a laminating process (dry laminating) It can be used as a protective film requiring heat resistance and heat insulation performance.
본 발명이 적용된 구체적인 사례를 사진을 통하여 입증한다.A concrete example to which the present invention is applied is shown through photographs.
1. 기존 제조방법으로 제조된 캡 실러의 위면 사진(사진1)과 접합면 사진(사진2)1. A photograph of a top seal (Photo 1) and a seal surface (Photo 2)
2. 본 발명의 제조방법으로 제조된 캡 실러의 위면 사진(사진3)과 접합면 사진(사진4)2. Photograph of upper side (Photo 3) and side view (Photo 4) of the cap sealer manufactured by the manufacturing method of the present invention.
Claims (5)
(b) 상기 단계 (a)의 결과물을 압출기를 이용하여 압출하는 단계;
(c) 상기 단계 (b)의 결과물을 수온 20-34℃의 냉각 수조에서 냉각시키는 단계;
(d) 상기 단계 (c)의 결과물을 10-30 m/min의 속도로 끌어올리는 공정을 실시하는 단계;
(e) 상기 단계 (d) 결과물에 설정된 온도로 가열된 저밀도 고발포 필름을 종축 연신하는 단계;
(f) 상기 단계 (e) 결과물에 설정된 온도로 가열된 제1, 제2, 제3 폴리싱 롤라로 저밀도 고발포 종축연신 필름 표면을 폴리싱하는 단계;
(g) 상기 단계 (f)의 결과물에 직류(DC) 6-10 암페어(A)의 전류로 코로나(corona) 처리하는 단계; 및
(h) 상기 단계 (g)의 결과물을 냉각시키는 단계를 포함하는 것을 특징으로 하는 저밀도 고발포 종축 연신 필름의 제조 방법.(a) mixing a polypropylene resin, a low-density polyethylene resin, a linear low-density polyethylene resin, a foaming agent, a fluorine-based additive and a pigment;
(b) extruding the result of step (a) using an extruder;
(c) cooling the result of step (b) in a cooling water bath at a water temperature of 20-34 ° C;
(d) performing a step of raising the result of step (c) at a rate of 10-30 m / min;
(e) longitudinally stretching the resultant low-density high vapor-deposited film heated to a predetermined temperature;
(f) polishing the surface of the low-density highly-deformable longitudinally stretched film with the first, second, and third polishing rolls heated to a temperature set in the step (e);
(g) subjecting the result of step (f) to corona treatment with a current of DC 6-10 amperes (A); And
(h) cooling the resultant of step (g). < Desc / Clms Page number 20 >
상기 단계 (b)의 압출은 실린더 온도 185-217℃ 및 종축 연신 공정에서 제1, 제2 롤라의 회전속도비를 2:4과 롤라의 온도를 90-140℃ 범위의 조건으로 종축 연신하는 것을 특징으로 하는 저밀도 고발포 종축 연신 필름의 제조 방법.The method according to claim 1,
The extrusion of the step (b) is carried out by longitudinally stretching the film at a cylinder temperature of 185-217 캜 and in a longitudinal axis stretching process under the condition that the rotational speed ratio of the first and second rollers is 2: 4 and the temperature of the rollers is in the range of 90-140 캜 Characterized in that the method comprises the steps of:
상기 단계 (b)의 압출은 실린더 온도 185-217℃ 및 폴리싱 공정에서 롤라의 온도를 90-140℃ 범위의 조건으로 폴리싱하는 것을 특징으로 하는 저밀도 고발포 종축 연신 필름의 제조 방법.The method according to claim 1,
Wherein the extrusion of the step (b) is performed at a cylinder temperature of 185-217 占 폚 and the rollers are polished at a temperature in the range of 90-140 占 폚 in the polishing step.
상기 단계 (b)의 압출은 실린더 온도 185-217℃, 종축 연신 공정에서 제1, 제2 롤라의 회전속도비를 2:4와 롤라의 온도를 90-140℃ 범위에서 종축 연신 및 폴리싱 공정에서 롤라의 온도를 90-140℃ 범위의 조건으로 폴리싱하는 것을 특징으로 하는 저밀도 고발포 종축 연신 필름의 제조 방법.The method according to claim 1,
The extrusion of the step (b) is carried out at a cylinder temperature of 185-217 DEG C in a longitudinal axis stretching and polishing process in the range of 90-140 DEG C with the rotational speed ratio of the first and second rollers of 2: Characterized in that the temperature of the roller is polished at a temperature in the range of 90 to 140 占 폚.
조성물의 혼합비는 폴리프로필렌 수지 100 중량부를 기준하여 저밀도 폴리에틸렌 수지 73-77 중량부, 선형 저밀도 폴리에틸렌 수지 73-77 중량부, 발포제 5-7 중량부, 불소계 첨가제 0.5-1 중량부 및 안료 0.3-0.9 중량부를 혼합하여 실시하는 것을 특징으로 하는 저밀도 고발포 종축 연신 필름의 제조 방법.The method according to claim 1,
The mixing ratio of the composition is 73 to 77 parts by weight of a low density polyethylene resin, 73 to 77 parts by weight of a linear low density polyethylene resin, 5 to 7 parts by weight of a foaming agent, 0.5 to 1 part by weight of a fluorine additive, By weight, based on the total weight of the low-molecular-weight high-
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102212283B1 (en) | 2020-01-30 | 2021-02-04 | 주식회사 피에스원 | Manufacturing method of foamed film for cap-liner |
| CN113071121A (en) * | 2021-04-02 | 2021-07-06 | 韶关市盛益塑胶制品有限公司 | PET sheet production process |
| CN113211835A (en) * | 2021-04-07 | 2021-08-06 | 韶关市盛益塑胶制品有限公司 | Automatic production process of blister packaging film |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102212283B1 (en) | 2020-01-30 | 2021-02-04 | 주식회사 피에스원 | Manufacturing method of foamed film for cap-liner |
| CN113071121A (en) * | 2021-04-02 | 2021-07-06 | 韶关市盛益塑胶制品有限公司 | PET sheet production process |
| CN113211835A (en) * | 2021-04-07 | 2021-08-06 | 韶关市盛益塑胶制品有限公司 | Automatic production process of blister packaging film |
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