KR20090003907A - Air permeable film - Google Patents

Air permeable film Download PDF

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KR20090003907A
KR20090003907A KR1020070067664A KR20070067664A KR20090003907A KR 20090003907 A KR20090003907 A KR 20090003907A KR 1020070067664 A KR1020070067664 A KR 1020070067664A KR 20070067664 A KR20070067664 A KR 20070067664A KR 20090003907 A KR20090003907 A KR 20090003907A
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weight
parts
film
experiment
breathable film
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전미경
임동규
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전미경
임동규
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    • 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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/18—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing inorganic materials
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
    • A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
    • A61L15/22—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons containing macromolecular materials
    • A61L15/24—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/06—Polyethene
    • 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
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/16—Applications used for films
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2207/00—Properties characterising the ingredient of the composition
    • C08L2207/06—Properties of polyethylene
    • C08L2207/066—LDPE (radical process)

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
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Abstract

An air permeable film is provided to prevent the skin trouble in being used for the sanitary napkin or the diaper by having the neutral pH and containing aluminosilicate with excellent dewetting property and less toxicity compared with calcium oxide. An air permeable film comprises calcium carbonate 100.0 parts by weight, a base resin 40-150 parts by weight and sodium aluminosilicate 0.05-20 parts by weight. The air permeable film more includes silica (SiO2) 0.5-30 parts by weight. The base film comprises at least one of the linear low density polyethylene (LLDPE) and low density polyethylene (LDPE). The base film more includes the metallocene polyethylene (m-LLDPE).

Description

통기성 필름{AIR PERMEABLE FILM}Breathable film {AIR PERMEABLE FILM}

본 발명은 통기성 필름에 관한 것으로서, 보다 상세하게는, 중성의 PH를 가지는 통기성 필름에 관한 것이다.The present invention relates to a breathable film, and more particularly to a breathable film having a neutral PH.

통기성 필름은 일회용 기저귀, 방수의류, 포장재료, 위생재료 등 여러 용도로 사용된다.Breathable film is used for many purposes such as disposable diapers, waterproof clothing, packaging materials, sanitary materials.

통기성 필름은 폴리올레핀 수지에 무기충전물을 첨가한 후, 용융제막하여 얻어진 필름을 연신하여 제조한다. 연신과정에서 수지와 무기충전물 사이에 미세한 다공이 형성되어 통기성을 갖게 되며, 수분은 통과시키지 않는다.The air permeable film is prepared by adding an inorganic filler to the polyolefin resin and then stretching the film obtained by melt film formation. In the stretching process, fine pores are formed between the resin and the inorganic filler to have breathability, and moisture does not pass through.

무기충전물 사용 시 무기충전물에 함유되어 있는 수분에 의해 필름가공 시 수분마크가 생기며 심할 경우 필름자체가 성형되지 않는다. 따라서 통기성 필름의 제조에는 제습제가 사용되고, 제습제로는 통상 산화칼슘(CaO)이 사용된다.When using inorganic fillers, moisture marks are generated during film processing due to the moisture contained in the inorganic fillers, and the film itself is not molded in severe cases. Therefore, a dehumidifier is used for manufacture of a breathable film, and calcium oxide (CaO) is used normally as a dehumidifier.

그런데 산화칼슘은 통기성필름을 염기성(PH : 12.5 내지 13)으로 만드는 문제가 있다. 염기성을 가지는 통기성필름은 피부에 직접 접촉하는 생리대나 기저귀 용도로 사용 시 피부에 많은 문제를 유발하기 때문에 생리대용으로는 사용하지 못하게 된다. However, calcium oxide has a problem of making the breathable film basic (PH: 12.5 to 13). The breathable film having basicity cannot be used for sanitary napkins because it causes many problems for the skin when used for a sanitary napkin or diaper that is in direct contact with the skin.

따라서 본 발명의 목적은 중성 PH값을 가져 인체접촉용으로 사용가능한 통기성 필름을 제공하는 것이다.It is therefore an object of the present invention to provide a breathable film having a neutral PH value and usable for human contact.

상기 목적은 탄산칼슘 100중량부와; 베이스 수지 40 내지 150 중량부와; 알루미노 규산나트륨(sodium aluminosilicate) 0.05 내지 20중량부를 포함하는 통기성 필름에 의하여 달성된다.The object is 100 parts by weight of calcium carbonate; 40 to 150 parts by weight of the base resin; It is achieved by a breathable film containing 0.05 to 20 parts by weight of sodium aluminosilicate.

실리카(SiO2)를 0.5 내지 30중량부 더 포함하는 것이 바람직하다.It is preferable to further contain 0.5 to 30 parts by weight of silica (SiO 2 ).

상기 베이스 필름은 선형저밀도 폴리에틸렌(LLDPE)와 저밀도 폴리에틸렌(LDPE) 중 적어도 하나를 포함하여 이루어진 것이 바람직하다.The base film preferably comprises at least one of linear low density polyethylene (LLDPE) and low density polyethylene (LDPE).

상기 베이스 필름은 메탈로센 폴리에틸렌(m-LLDPE)을 더 포함하여 이루어진 것이 바람직하다.Preferably, the base film further includes metallocene polyethylene (m-LLDPE).

통기성필름을 제조하는 방법의 일예는 다음과 같다. An example of a method of manufacturing a breathable film is as follows.

베이스 수지, 무기충전제, 제습제, 분산제 등을 슈퍼믹서기로 혼합한 후 트윈 압출기로 컴파운드를 하여 펠렛 칩을 만든다.Base resin, inorganic filler, dehumidifying agent, dispersant, etc. are mixed with a super mixer and compounded with a twin extruder to make pellet chips.

컴파운드하여 만든 펠렛 칩을 T-다이 압출기를 이용하여 필름을 제조한다. 필름 제조 조건은 가공온도 130 내지 270℃, 연신비를 1.5 내지 2.5배로 연신하여 통기도를 조절하고 필름두께 중량은 7 내지 40g/m2 의 통기성필름을 만든다. Compounded pellet chips are prepared using a T-die extruder to produce a film. The film manufacturing conditions are stretched to a processing temperature of 130 to 270 ℃, the stretching ratio to 1.5 to 2.5 times to adjust the air permeability and the film thickness weight of 7 to 40g / m 2 to make a breathable film.

본 발명에서는 무기충전제로 탄산칼슘을 사용하고, 제습제로는 알루미노 규산나트륨(sodium aluminosilicate)을 사용한다. 제습제로는 알루미노 규산나트륨과 함께 실리카를 더 사용할 수 있다.In the present invention, calcium carbonate is used as an inorganic filler, and sodium aluminosilicate is used as a dehumidifying agent. As the dehumidifying agent, silica may be further used together with alumino sodium silicate.

본 발명에 따른 통기성 필름의 조성은 탄산칼슘 100중량부, 베이스 수지 40 내지 150 중량부, 알루미노 규산나트륨(sodium aluminosilicate) 0.05 내지 20중량부이며, 실리카(SiO2)를 0.5 내지 30중량부 더 포함할 수 있다.The composition of the breathable film according to the present invention is 100 parts by weight of calcium carbonate, 40 to 150 parts by weight of the base resin, 0.05 to 20 parts by weight of sodium aluminosilicate, and 0.5 to 30 parts by weight of silica (SiO 2 ). It may include.

베이스 수지는 선형저밀도 폴리에틸렌(LLDPE) 그리고/또는 저밀도 폴리에틸렌(LDPE)을 사용할 수 있으며, 메탈로센 폴리에틸렌(m-LLDPE)를 더 포함할 수 있다. 메탈로센 폴리에틸렌(m-LLDPE)을 사용하면 연신시 통기도 조절이 용이한 한 효과가 있으며, 그 함량은 베이스 수지 중 5wt% 내지 20wt% 일 수 있다.The base resin may use linear low density polyethylene (LLDPE) and / or low density polyethylene (LDPE), and may further include metallocene polyethylene (m-LLDPE). The use of metallocene polyethylene (m-LLDPE) has an effect that it is easy to control the ventilation during stretching, the content may be 5wt% to 20wt% of the base resin.

알루미노 규산나트륨은 실리카(SiO2) 55±5중량%, 알루미나(Al2O3) 26±5중량%, 산화나트륨(Na2O) 14±5중량%, 물(H2O) 5±5중량%로 이루어져 있으며, 이들 4가지 성분은 서로 밀접하게 연결되어 있다. Sodium alumino silicate is 55 ± 5% by weight of silica (SiO 2 ), 26 ± 5% by weight of alumina (Al 2 O 3 ), 14 ± 5% by weight of sodium oxide (Na 2 O), 5 ± 5% by weight of water (H 2 O) It consists of%, these four components are closely connected to each other.

알루미노 규산나트륨을 0.05중량부 이하로 사용하면 제습능력이 저하되고 필름성형이 어려워진다. 반면 알루미노 규산나트륨을 20중량부 이상 사용하면 원가부담이 커지고 무기필러로서의 기능이 탄산칼슘 대비 떨어지는 문제가 발생된다.If the alumino sodium silicate is used at 0.05 parts by weight or less, the dehumidification capacity is lowered and film forming becomes difficult. On the other hand, when more than 20 parts by weight of sodium alumino silicate is used, the cost burden increases and the function as an inorganic filler is inferior to calcium carbonate.

실리카를 0.5중량부 이하로 사용하면 PH조절이 미미하다. 반면 실리카를 30중량부 이상 사용하면 작업성 저하로 생산성에 문제가 있다.If the silica is used at 0.5 parts by weight or less, the pH control is insignificant. On the other hand, when using more than 30 parts by weight of silica, there is a problem in productivity due to lower workability.

알루미노 규산나트륨 자체의 PH는 8.5 내지 9.9이며, 실리카 자체의 PH는 3 내지 8이다.The pH of sodium alumino silicate itself is 8.5 to 9.9, and the pH of silica itself is 3 to 8.

한편 종래 제습제로 사용된 산화칼슘의 PH는 12.5 내지 13이며, 무기충전제인 탄산칼슘의 PH는 8.8 내지 10이다.Meanwhile, the pH of calcium oxide used as a conventional dehumidifying agent is 12.5 to 13, and the pH of calcium carbonate as an inorganic filler is 8.8 to 10.

이하 실험결과를 통하여 본 발명을 상세히 설명한다.Hereinafter, the present invention will be described in detail through experimental results.

실험 1과 실험 2에서는 알루미노 규산나트륨과 산화 칼슘의 사용에 따른 통기성 필름의 PH변화를 관찰하였다.In Experiment 1 and Experiment 2, the pH change of the breathable film was observed according to the use of alumino sodium silicate and calcium oxide.

실험 3과 실험 4에서는 본 발명에서 사용된 알루미노 규산나트륨과 산화 칼슘의 제습 성능을 관찰하였다.In Experiment 3 and Experiment 4, the dehumidification performance of sodium alumino silicate and calcium oxide used in the present invention was observed.

실험 5에서는 알루미노 규산나트륨과 함께 사용되는 실리카의 성능을 관찰하였다.In Experiment 5, the performance of silica used with alumino sodium silicate was observed.

<실험 1 >Experiment 1

: 알루미노 규산나트륨의 사용에 따른 PH관찰: PH Observation on Use of Alumino Sodium Silicate

실험 1에서는 제습제로 알루미노 규산나트륨을 사용하였으며, 그 사용량을 바꾸어 가면서 통기성 필름의 PH를 관찰하였다.In Experiment 1, sodium alumino silicate was used as a dehumidifying agent, and the pH of the breathable film was observed while changing the amount of its use.

실험에서는 먼저, 폴리올레핀 수지 90중량부, 탄산칼슘 100중량부, 분산제 10중량부 및 알루미노 실리케이트를 배합하여 컴파운드를 제조하였다.In the experiment, first, a compound was prepared by blending 90 parts by weight of a polyolefin resin, 100 parts by weight of calcium carbonate, 10 parts by weight of a dispersant, and an aluminosilicate.

폴리올레핀 수지로는 엘지화학의 선형저밀도 폴리에틸렌(상표명 ST408)를 70중량부, 호남석유화학의 저밀도 폴리에틸렌(상표명 XL610) 20중량부 사용하였다.As the polyolefin resin, 70 parts by weight of LG Chem linear low density polyethylene (trade name ST408) and 20 parts by weight of Honam Petrochemical low density polyethylene (trade name XL610) were used.

분산제로는 징크스테아레이트, 칼슘스테아레이트, EBS(에틸렌 비스 스테아르아미드) 왁스를 각각 4중량부, 4중량부, 2중량부 사용하였다.As the dispersant, 4 parts by weight, 4 parts by weight, and 2 parts by weight of zinc stearate, calcium stearate, and EBS (ethylene bis stearamide) wax were used, respectively.

알루미노 실리케이트는 0.4 중량부에서 20중량부까지 변량하였다. 알루미노 실리케이트는 55중량%로 농축시킨 마스터 배치를 사용하였다.Aluminosilicates were varied from 0.4 parts by weight to 20 parts by weight. Aluminosilicates were used in a master batch concentrated to 55% by weight.

이후 컴파운드를 트윈 압출기로 컴파운더한후 T-다이 압출기로 압출하여 통기성 필름을 제조하였다. 필름 제조 조건을 살펴보면 가공온도는 130 내지 270℃, 연신비는 1.7배로 연신하여 통기도를 2000CC/m2로하여 필름두께 중량은 30g/m2로 조절하였다. PH측정은 상온(약 23℃)에서 물 10ml에 통기성 필름 3g을 넣고 1시간동안 잘 저어 준 뒤 측정하였다. 측정장비로는 미국, 보스턴, 오리온 리서치사의 제품, 모델명 720A를 사용하였다.The compound was then compounded with a twin extruder and then extruded with a T-die extruder to produce a breathable film. Looking at the film production conditions, the processing temperature is stretched to 130 to 270 ℃, the draw ratio is 1.7 times the air permeability of 2000CC / m 2 and the film thickness weight was adjusted to 30g / m 2 . The pH was measured after adding 3 g of a breathable film to 10 ml of water at room temperature (about 23 ° C.) and stirring well for 1 hour. As a measuring instrument, US, Boston, Orion Research Inc. model name 720A was used.

표 1에 실험 1의 결과를 나타내었다.Table 1 shows the results of Experiment 1.

<표 1>TABLE 1

Figure 112007049219242-PAT00001
Figure 112007049219242-PAT00001

표 1을 보면 알루미노 실리케이트를 20중량부까지 증가시켜도 PH의 증가는 관찰되지 않는다.In Table 1, no increase in pH is observed even if the aluminosilicate is increased to 20 parts by weight.

<실험 2>Experiment 2

: 산화 칼슘의 사용에 따른 PH관찰: Observation of PH by Using Calcium Oxide

실험 2에서는 제습제로 종래의 산화 칼슘을 사용하였으며, 그 사용량을 바꾸어 가면서 통기성 필름의 PH를 관찰하였다.In Experiment 2, conventional calcium oxide was used as a dehumidifying agent, and the pH of the breathable film was observed while changing the amount of use thereof.

실험방법은 실험 1과 동일하며, 산화 칼슘은 폴리올레핀 수지에 55중량%로 농축한 경성화학의 상표명 WA500 M/B를 사용하였다.Experimental method was the same as in Experiment 1. Calcium oxide was used under the trade name WA500 M / B of hard chemical concentrated to 55% by weight in polyolefin resin.

표 2에 실험 2의 결과를 정리하였다.Table 2 summarizes the results of Experiment 2.

<표 2>TABLE 2

Figure 112007049219242-PAT00002
Figure 112007049219242-PAT00002

표 2를 보면 산화 칼슘의 사용량 증가에 따라 PH가 급격히 증가하며, 산화 칼슘을 8 중량부 사용하면 PH가 12.0까지 증가함을 알 수 있다.Looking at Table 2, it can be seen that the pH increases rapidly as the amount of calcium oxide is increased, and the pH increases to 12.0 when 8 parts by weight of calcium oxide is used.

<실험 3 >Experiment 3

: 알루미노 실리케이트의 제습성능 관찰: Observation of dehumidification performance of aluminosilicate

실험 3에서는 제습제로 알루미노 실리케이트를 사용하였으며, 그 사용량을 바꾸어 가면서 수분 마크의 개수를 관찰하였다.In Experiment 3, aluminosilicate was used as a dehumidifying agent, and the number of moisture marks was observed while changing the amount used.

필름 제조방법은 실험 1과 동일하며, 물 0.4중량부가 추가되었다.Film production method was the same as in Experiment 1, 0.4 parts by weight of water was added.

수분마크는 타원형으로 생겼으며 정상부위보다 필름두께가 얇은 부분이다. Moisture mark is oval shaped and thinner than normal.

수분마크가 심하면 필름에 구멍을 발생시킨다. 수분마크는 필름가공 후 30분 경과 후에 1000cm2씩 10장 샘플링하여 관찰하였다.If the moisture mark is too severe, holes are formed in the film. The water mark was observed by sampling 10 sheets of 1000 cm 2 after 30 minutes of film processing.

표 3에 실험 3의 결과를 정리하였다.Table 3 summarizes the results of Experiment 3.

<표 3>TABLE 3

Figure 112007049219242-PAT00003
Figure 112007049219242-PAT00003

표 3을 보면 알루미노 실리케이트의 사용량을 늘리면 수분 마크의 개수가 급격히 감소하여, 3중량부 이상을 사용하면 수분마크가 발생하지 않음을 알 수 있다.Looking at Table 3, it can be seen that increasing the amount of aluminosilicate used greatly reduces the number of moisture marks, and when more than 3 parts by weight is used, moisture marks do not occur.

<실험 4 >Experiment 4

: 산화칼슘의 제습성능 관찰: Dehumidification performance of calcium oxide

실험 4에서는 제습제로 종래의 산화칼슘을 사용하였으며, 그 사용량을 바꾸어 가면서 수분 마크의 개수를 관찰하였다.In Experiment 4, conventional calcium oxide was used as the dehumidifying agent, and the number of moisture marks was observed while changing the amount of use thereof.

필름 제조방법은 실험 1과 동일하며, 물 0.4중량부가 추가되었다.Film production method was the same as in Experiment 1, 0.4 parts by weight of water was added.

표 4에 실험 4의 결과를 정리하였다.Table 4 summarizes the results of Experiment 4.

<표 4> TABLE 4

Figure 112007049219242-PAT00004
Figure 112007049219242-PAT00004

표 4를 보면 알루미노 실리케이트와 비교하여 동일 사용량에서 수분마크의 개수가 많으며, 4중량부 이상을 사용하여야 수분마크가 발생하지 않음을 알 수 있다. Looking at Table 4 it can be seen that the number of moisture marks in the same amount of use compared to the aluminosilicate, and more than 4 parts by weight of the moisture mark does not occur.

<실험 5 >Experiment 5

: 실리카변량시 PH 관찰: Observation of PH in silica

실험 4에서는 알루미노 실리케이트의 사용량은 2중량부로 고정하고, 실리카의 사용량을 변량하면서 PH변화를 관찰하였다.In Experiment 4, the amount of aluminosilicate was fixed at 2 parts by weight, and the pH change was observed while varying the amount of silica.

필름 제조방법은 실험 1과 동일하다.The film manufacturing method is the same as that of Experiment 1.

표 5에 실험 5의 결과를 정리하였다.Table 5 summarizes the results of Experiment 5.

<표 5>TABLE 5

Figure 112007049219242-PAT00005
Figure 112007049219242-PAT00005

표 5를 보면 실리카 사용량이 증가함에 따라 통기성 필름의 PH가 감소하며, 실리카를 20중량부 사용하면 PH가 8.1까지 감소함을 알 수 있다.Looking at Table 5, it can be seen that the PH of the breathable film decreases as the amount of silica increases, and the pH decreases to 8.1 when 20 parts by weight of silica is used.

이상의 실험결과로부터 통기성 필름에 실리카를 사용하면, 통기성 필름의 PH상승을 막을 수 있음을 알 수 있다. 또한 동일량 사용시 알루미노 실리케이트는 산화 칼슘에 비해 제습특성이 우수함도 알 수 있다.From the above experimental results, it can be seen that the use of silica in the breathable film can prevent the increase in PH of the breathable film. In addition, it can be seen that the aluminosilicate has better dehumidification characteristics than calcium oxide when the same amount is used.

한편, 산화 칼슘은 맹독성인 반면, 알루미노 실리케이트는 저독성(LD50<rat> 1000mg/kg)으로 신체접촉 제품에 더 적합하다.Calcium oxide, on the other hand, is highly toxic, while aluminosilicates are less toxic (LD50 <rat> 1000 mg / kg) and are more suitable for contact products.

이상 설명한 바와 같이, 본 발명에 따르면 중성 PH값을 가져 인체접촉용으로 사용가능한 통기성 필름이 제공된다.As described above, according to the present invention, a breathable film having a neutral PH value and usable for human contact is provided.

Claims (4)

통기성 필름에 있어서,In the breathable film, 탄산칼슘 100중량부와;100 parts by weight of calcium carbonate; 베이스 수지 40 내지 150 중량부와;40 to 150 parts by weight of the base resin; 알루미노 규산나트륨(sodium aluminosilicate) 0.05 내지 20중량부를 포함하는 통기성 필름.Breathable film containing 0.05 to 20 parts by weight of sodium aluminosilicate (sodium aluminosilicate). 제1항에 있어서,The method of claim 1, 실리카(SiO2)를 0.5 내지 30중량부 더 포함하는 것을 특징으로 하는 통기성 필름.Breathable film, characterized in that it further comprises 0.5 to 30 parts by weight of silica (SiO 2 ). 제1항에 있어서,The method of claim 1, 상기 베이스 필름은 선형저밀도 폴리에틸렌(LLDPE)와 저밀도 폴리에틸렌(LDPE) 중 적어도 하나를 포함하여 이루어진 것을 특징으로 하는 통기성필름.The base film is a breathable film, characterized in that it comprises at least one of linear low density polyethylene (LLDPE) and low density polyethylene (LDPE). 제3항에 있어서,The method of claim 3, 상기 베이스 필름은 메탈로센 폴리에틸렌(m-LLDPE)을 더 포함하여 이루어진 것을 특징으로 하는 통기성필름.The base film is a breathable film, characterized in that further comprises a metallocene polyethylene (m-LLDPE).
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101812195A (en) * 2010-04-03 2010-08-25 大连盖特科技发展有限公司 Preparation of low-carbon energy-saving modified polyethylene waterproof special material
CN110079001A (en) * 2019-05-27 2019-08-02 佛山华韩卫生材料有限公司 A kind of very thin high ventilative zero leakage counterdie of pro-skin
CN112029184A (en) * 2020-08-22 2020-12-04 上海海湾塑胶制品有限公司 Antibacterial casting film and preparation method and application thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101812195A (en) * 2010-04-03 2010-08-25 大连盖特科技发展有限公司 Preparation of low-carbon energy-saving modified polyethylene waterproof special material
CN101812195B (en) * 2010-04-03 2012-09-26 大连盖特科技发展有限公司 Preparation of low-carbon energy-saving modified polyethylene waterproof special material
CN110079001A (en) * 2019-05-27 2019-08-02 佛山华韩卫生材料有限公司 A kind of very thin high ventilative zero leakage counterdie of pro-skin
CN112029184A (en) * 2020-08-22 2020-12-04 上海海湾塑胶制品有限公司 Antibacterial casting film and preparation method and application thereof

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