KR102488445B1 - Manufacturing method of polyvinyl alcohol mixed resin with improved water resistance - Google Patents
Manufacturing method of polyvinyl alcohol mixed resin with improved water resistance Download PDFInfo
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- KR102488445B1 KR102488445B1 KR1020220144519A KR20220144519A KR102488445B1 KR 102488445 B1 KR102488445 B1 KR 102488445B1 KR 1020220144519 A KR1020220144519 A KR 1020220144519A KR 20220144519 A KR20220144519 A KR 20220144519A KR 102488445 B1 KR102488445 B1 KR 102488445B1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 75
- 239000004372 Polyvinyl alcohol Substances 0.000 title claims abstract description 59
- 229920002451 polyvinyl alcohol Polymers 0.000 title claims abstract description 59
- 239000011347 resin Substances 0.000 title claims abstract description 54
- 229920005989 resin Polymers 0.000 title claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 title claims description 21
- 238000002156 mixing Methods 0.000 claims abstract description 129
- 239000000203 mixture Substances 0.000 claims abstract description 51
- 238000003756 stirring Methods 0.000 claims abstract description 44
- POWFTOSLLWLEBN-UHFFFAOYSA-N tetrasodium;silicate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])[O-] POWFTOSLLWLEBN-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000008213 purified water Substances 0.000 claims abstract description 36
- 229920002472 Starch Polymers 0.000 claims abstract description 35
- 239000008107 starch Substances 0.000 claims abstract description 35
- 235000019698 starch Nutrition 0.000 claims abstract description 35
- 240000003183 Manihot esculenta Species 0.000 claims abstract description 32
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims abstract description 32
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 239000008162 cooking oil Substances 0.000 claims abstract description 20
- 239000002699 waste material Substances 0.000 claims abstract description 20
- 239000000654 additive Substances 0.000 claims abstract description 18
- 230000000996 additive effect Effects 0.000 claims abstract description 18
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims description 13
- 239000004115 Sodium Silicate Substances 0.000 claims description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 2
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 15
- 239000010902 straw Substances 0.000 abstract description 9
- 238000000354 decomposition reaction Methods 0.000 abstract description 6
- 239000007788 liquid Substances 0.000 abstract description 5
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 abstract description 5
- 229920002554 vinyl polymer Polymers 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract 2
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 5
- 239000000047 product Substances 0.000 description 5
- 238000006065 biodegradation reaction Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000007864 aqueous solution Substances 0.000 description 2
- 229920006238 degradable plastic Polymers 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical group N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229920000426 Microplastic Polymers 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 229920000704 biodegradable plastic Polymers 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000012770 industrial material Substances 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000007655 standard test method Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L29/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical; Compositions of hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Compositions of derivatives of such polymers
- C08L29/02—Homopolymers or copolymers of unsaturated alcohols
- C08L29/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- 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
- C08K3/02—Elements
- C08K3/04—Carbon
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L3/00—Compositions of starch, amylose or amylopectin or of their derivatives or degradation products
- C08L3/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
Abstract
Description
본 발명은 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법에 관한 것으로, 더욱 상세하게는 내수성 개선으로 인해 수분에 의해 분해되는 기간이 연장되어 일회용품, 빨대, 컵 뚜껑, 농업용 필름 및 농업용멀칭비닐(액상 멀칭) 등으로 적용이 가능하며 수분에 노출된 후에 일정 기간이 경과하면 자연적으로 용해되기 때문에 친환경적인 효과를 나타내는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법에 관한 것이다.The present invention relates to a method for manufacturing polyvinyl alcohol mixed resin with improved water resistance, and more particularly, due to the improved water resistance, the period of decomposition by moisture is extended, so that disposable products, straws, cup lids, agricultural films and agricultural mulching vinyl ( liquid mulching), etc., and is naturally dissolved after a certain period of time after being exposed to moisture, so it relates to a method for producing a polyvinyl alcohol mixed resin with improved water resistance showing an eco-friendly effect.
플라스틱은 뛰어난 물성과 함께 값싸고 가벼운 특성으로 인해 천연소재가 갖는 물성의 한계를 벗어나 다양한 분야에서 사용되고 있다.Plastics are used in various fields beyond the limits of physical properties of natural materials due to their cheapness and lightness along with excellent physical properties.
플라스틱은 기계적 물성이 강하고, 쉽게 분해되지 않는 특성이 있으며, 이러한 물성으로 인해 산업용 소재에서 일회용 소재에 이르기까지 다양한 산업에 사용되고 있으며, 플라스틱의 강성 및 내구성을 향상시키기 위한 연구가 지속되고 있다.Plastics have strong mechanical properties and are not easily decomposed. Due to these properties, plastics are used in various industries ranging from industrial materials to disposable materials, and research to improve the rigidity and durability of plastics is ongoing.
그러나, 플라스틱의 사용은 자연에서 분해가 어렵고, 분해 중간 산물인 미세플라스틱은 새로운 환경오염 문제로 대두되고 있으며, 소각 등으로 인해 폐기처리하는 과정에서 다이옥신 등과 같은 인체유해 물질이 다량 배출되는 문제점이 있었다.However, the use of plastic is difficult to decompose in nature, and microplastics, which are intermediate products of decomposition, are emerging as a new environmental pollution problem. .
상기의 문제로 인해 비분해성 플라스틱 사용에 대한 각국의 법률적인 규제의 기준도 점차 강화되고 있으며, 이러한 문제를 해소하기 위해 생분해성 플라스틱의 개발이 매우 중요한 사항으로 다루어지고 있다.Due to the above problems, the legal standards of each country for the use of non-degradable plastics are gradually being strengthened, and in order to solve these problems, the development of biodegradable plastics is being treated as a very important matter.
일반적으로 분해성 플라스틱은 미국 ASTM(American Society for Testing and Materials)에 따르면 특정 환경 조건에서 일정기간 동안 화학적 구조가 상당히 변화되어 그 성질 변화를 표준 시험방법으로 측정할 수 있는 플라스틱을 말하며, 광분해성, 생붕괴성 및 생분해성 등으로 구분된다.In general, degradable plastics refer to plastics whose chemical structure is significantly changed for a certain period of time under specific environmental conditions according to the American Society for Testing and Materials (ASTM), and the change in properties can be measured by standard test methods. It is classified into disintegration and biodegradability.
한편, 폴리비닐알코올은 우수한 생분해성을 나타내지만, 수분에 노출되면 급격하게 용해되는 특성으로 인해 빨대나 음료홀더의 뚜껑과 같이 지속적으로 수분에 노출되는 제품에는 적용이 어려운 문제점이 있었다.On the other hand, polyvinyl alcohol exhibits excellent biodegradability, but has a problem in that it is difficult to apply to products that are continuously exposed to moisture, such as straws or lids of beverage holders, due to the property of rapidly dissolving when exposed to moisture.
본 발명의 목적은 내수성 개선으로 인해 수분에 의해 분해되는 기간이 연장되어 일회용품, 빨대, 컵 뚜껑, 농업용 필름 및 농업용멀칭비닐(액상 멀칭) 등으로 적용이 가능하며 수분에 노출된 후에 일정 기간이 경과하면 자연적으로 용해되기 때문에 친환경적인 효과를 나타내는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법을 제공하는 것이다.An object of the present invention is to extend the period of decomposition by moisture due to improved water resistance, so that it can be applied to disposable products, straws, cup lids, agricultural films, agricultural mulching vinyl (liquid mulching), etc., and after a certain period of time has elapsed after exposure to moisture It is to provide a method for producing a polyvinyl alcohol mixed resin having improved water resistance that exhibits an environmentally friendly effect because it is naturally dissolved.
본 발명의 목적은 정제수에 폴리비닐알코올을 혼합하고 교반하는 원료혼합단계, 상기 원료혼합단계를 통해 제조된 혼합물에 타피오카전분을 혼합하고 교반하는 타피오카전분혼합단계, 상기 타피오카전분혼합단계를 통해 제조된 혼합물에 소포제와 활성탄을 혼합하고 교반하는 첨가제혼합단계, 상기 첨가제혼합단계를 통해 제조된 혼합물에 올소규산나트륨과 정제수를 혼합하고 교반하는 올소규산나트륨혼합단계 및 상기 올소규산나트륨혼합단계를 통해 제조된 혼합물에 폐식용유를 혼합하고 교반하는 폐식용유혼합단계로 이루어지는 것을 특징으로 하는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법을 제공함에 의해 달성된다.An object of the present invention is a raw material mixing step of mixing polyvinyl alcohol with purified water and stirring, a tapioca starch mixing step of mixing and stirring tapioca starch in the mixture prepared through the raw material mixing step, and a tapioca starch mixing step prepared through the tapioca starch mixing step. The additive mixing step of mixing and stirring the antifoaming agent and activated carbon in the mixture, the sodium orthosilicate mixing step of mixing sodium orthosilicate and purified water with the mixture prepared through the additive mixing step and stirring, and the sodium orthosilicate mixing step. It is achieved by providing a method for producing a polyvinyl alcohol mixed resin with improved water resistance, characterized in that it consists of a mixing step of mixing and stirring the waste cooking oil with the mixture.
본 발명의 바람직한 특징에 따르면, 상기 원료혼합단계는 정제수 100 중량부에 폴리비닐알코올 15 내지 40 중량부를 혼합하여 이루어지는 것으로 한다.According to a preferred feature of the present invention, the raw material mixing step is made by mixing 15 to 40 parts by weight of polyvinyl alcohol with 100 parts by weight of purified water.
본 발명의 더 바람직한 특징에 따르면, 상기 원료혼합단계는 70 내지 80℃의 온도에서 1000 내지 1500rpm의 속도로 40 내지 80분 동안 교반하여 이루어지는 것으로 한다.According to a more preferred feature of the present invention, the raw material mixing step is to be made by stirring for 40 to 80 minutes at a temperature of 70 to 80 ℃ at a speed of 1000 to 1500rpm.
본 발명의 더욱 바람직한 특징에 따르면, 상기 타피오카전분혼합단계는 상기 원료혼합단계를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 타피오카전분 10 내지 30 중량부를 혼합하여 이루어지는 것으로 한다.According to a more preferred feature of the present invention, the tapioca starch mixing step is made by mixing 10 to 30 parts by weight of tapioca starch with respect to 100 parts by weight of purified water contained in the mixture prepared through the raw material mixing step.
본 발명의 더욱 더 바람직한 특징에 따르면, 상기 첨가제혼합단계는 상기 타피오카전분혼합단계를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 소포제 5 내지 15 중량부 및 활성탄 1 내지 2 중량부를 혼합하여 이루어지는 것으로 한다.According to a more preferred feature of the present invention, the additive mixing step is made by mixing 5 to 15 parts by weight of an antifoaming agent and 1 to 2 parts by weight of activated carbon with respect to 100 parts by weight of purified water contained in the mixture prepared through the tapioca starch mixing step. do.
본 발명의 더욱 더 바람직한 특징에 따르면, 상기 올소규산나트륨혼합단계는 상기 첨가제혼합단계를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 올소규산나트륨 0.8 내지 10 중량부 및 정제수 15 내지 40 중량부를 혼합하여 이루어지는 것으로 한다.According to a further preferred feature of the present invention, the sodium orthosilicate mixing step mixes 0.8 to 10 parts by weight of sodium orthosilicate and 15 to 40 parts by weight of purified water with respect to 100 parts by weight of purified water contained in the mixture prepared through the additive mixing step. to be made by
본 발명의 더욱 더 바람직한 특징에 따르면, 상기 올소규산나트륨혼합단계는 25 내지 30℃의 온도에서 1500 내지 2000rpm의 속도로 10 내지 20분 동안 교반하여 이루어지는 것으로 한다.According to a further preferred feature of the present invention, the mixing step of sodium orthosilicate is to be performed by stirring at a temperature of 25 to 30 ° C. at a speed of 1500 to 2000 rpm for 10 to 20 minutes.
본 발명의 더욱 더 바람직한 특징에 따르면, 상기 폐식용유혼합단계는 상기 올소규산나트륨혼합단계를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 폐식용유 1.5 내지 2.5 중량부를 혼합하여 이루어지는 것으로 한다.According to a more preferred feature of the present invention, the waste cooking oil mixing step is made by mixing 1.5 to 2.5 parts by weight of waste cooking oil with respect to 100 parts by weight of purified water contained in the mixture prepared through the sodium orthosilicate mixing step.
본 발명에 따른 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법은 내수성 개선으로 인해 수분에 의해 분해되는 기간이 연장되어 일회용품, 빨대, 컵 뚜껑, 농업용 필름 및 농업용멀칭비닐(액상 멀칭) 등으로 적용이 가능하며 수분에 노출된 후에 일정 기간이 경과하면 자연적으로 용해되기 때문에 친환경적인 효과를 나타내는 폴리비닐알코올 혼합수지를 제공하는 탁월한 효과를 나타낸다.The manufacturing method of polyvinyl alcohol mixed resin with improved water resistance according to the present invention extends the decomposition period by moisture due to the improved water resistance, so it is applied to disposable products, straws, cup lids, agricultural films, agricultural mulching vinyl (liquid mulching), etc. This is possible, and since it is naturally dissolved after a certain period of time after exposure to moisture, it shows an excellent effect of providing a polyvinyl alcohol mixed resin that exhibits an environmentally friendly effect.
도 1은 본 발명에 따른 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법을 나타낸 순서도이다.
도 2는 본 발명의 실시예 1 및 비교예 1을 통해 제조된 폴리비닐알코올 혼합수지를 필름의 형태로 제조한 후에 내수성을 측정하여 나타낸 사진이다.
도 3은 본 발명의 실시예 1을 통해 제조된 폴리비닐알코올 혼합수지로 제조된 필름, 용기뚜껑 및 빨대를 촬영하여 나타낸 사진이다.1 is a flow chart showing a method for producing a polyvinyl alcohol mixed resin having improved water resistance according to the present invention.
2 is a photograph showing water resistance measured after preparing the polyvinyl alcohol mixed resin prepared in Example 1 and Comparative Example 1 of the present invention in the form of a film.
3 is a photograph showing a film, a container lid, and a straw made of a polyvinyl alcohol mixed resin prepared in Example 1 of the present invention.
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, a preferred embodiment of the present invention and the physical properties of each component will be described in detail, but this is to be explained in detail so that a person having ordinary knowledge in the art to which the present invention belongs can easily practice the invention, This is not meant to limit the technical spirit and scope of the present invention.
본 발명에 따른 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법은 정제수에 폴리비닐알코올을 혼합하고 교반하는 원료혼합단계(S101), 상기 원료혼합단계(S101)를 통해 제조된 혼합물에 타피오카전분을 혼합하고 교반하는 타피오카전분혼합단계(S103), 상기 타피오카전분혼합단계(S103)를 통해 제조된 혼합물에 소포제와 활성탄을 혼합하고 교반하는 첨가제혼합단계(S105), 상기 첨가제혼합단계(S105)를 통해 제조된 혼합물에 올소규산나트륨과 정제수를 혼합하고 교반하는 올소규산나트륨혼합단계(S107) 및 상기 올소규산나트륨혼합단계(S107)를 통해 제조된 혼합물에 폐식용유를 혼합하고 교반하는 폐식용유혼합단계(S109)로 이루어진다.The method for producing a polyvinyl alcohol mixed resin having improved water resistance according to the present invention includes a raw material mixing step (S101) of mixing polyvinyl alcohol with purified water and stirring, and tapioca starch in the mixture prepared through the raw material mixing step (S101). Tapioca starch mixing step of mixing and stirring (S103), additive mixing step of mixing and stirring the antifoaming agent and activated carbon with the mixture prepared through the tapioca starch mixing step (S103) and stirring (S105), through the additive mixing step (S105) A sodium orthosilicate mixing step (S107) of mixing and stirring sodium orthosilicate and purified water in the prepared mixture and a mixing waste cooking oil mixing step of mixing and stirring waste cooking oil with the mixture prepared through the sodium orthosilicate mixing step (S107) ( S109).
상기 원료혼합단계(S101)는 정제수에 폴리비닐알코올을 혼합하고 교반하는 단계로, 정제수 100 중량부에 폴리비닐알코올 15 내지 40 중량부를 혼합하고 70 내지 80℃의 온도에서 1000 내지 1500rpm의 속도로 40 내지 80분 동안 교반하는 과정으로 이루어지는 것이 바람직하다.The raw material mixing step (S101) is a step of mixing and stirring polyvinyl alcohol with purified water, mixing 15 to 40 parts by weight of polyvinyl alcohol with 100 parts by weight of purified water and mixing 40 parts by weight at a speed of 1000 to 1500 rpm at a temperature of 70 to 80 ° C. It is preferably made of a process of stirring for 80 minutes.
상기의 과정을 통해 폴리비닐알코올 성분이 정제수에 균일하게 용해된 폴리비닐알코올 수용액이 제조되는데, 상기 폴리비닐알코올의 혼합량이 15 중량부 미만이면 폴리비닐알코올 수용액의 질량농도가 지나치게 낮아 본 발명을 통해 제조되는 내수성이 개선된 폴리비닐알코올 혼합수지의 성형성이나 기계적 물성이 저하되며, 상기 폴리비닐알코올의 혼합량이 40 중량부를 초과하게 되면 정제수에 폴리비닐알코올 성분이 충분히 용해되지 못하기 때문에 바람직하지 못하다.Through the above process, a polyvinyl alcohol aqueous solution in which the polyvinyl alcohol component is uniformly dissolved in purified water is prepared. If the mixing amount of the polyvinyl alcohol is less than 15 parts by weight, the mass concentration of the polyvinyl alcohol aqueous solution is too low, The moldability and mechanical properties of the polyvinyl alcohol mixed resin having improved water resistance are deteriorated, and when the mixing amount of the polyvinyl alcohol exceeds 40 parts by weight, the polyvinyl alcohol component is not sufficiently dissolved in purified water, which is not preferable. .
또한, 상기 원료혼합단계(S101)의 온도가 70℃ 미만이거나 교반시간이 40분 미만이면 폴리비닐알코올이 정제수에 충분히 용해되지 못하며, 상기 원료혼합단계(S101)의 온도가 80℃를 초과하거나 교반시간이 80분을 초과하게 되면 폴리비닐알코올이 정제수에 충분히 용해되고도 지나치게 고온을 가하고 오랜시간 동안 교반하게 되는 것으로, 제조공정의 효율성이나 에너지효율성 측면에서 바람직하지 못하다.In addition, if the temperature of the raw material mixing step (S101) is less than 70 ° C or the stirring time is less than 40 minutes, polyvinyl alcohol is not sufficiently dissolved in purified water, and the temperature of the raw material mixing step (S101) exceeds 80 ° C or the stirring time is less than 40 minutes. If the time exceeds 80 minutes, even if polyvinyl alcohol is sufficiently dissolved in purified water, excessively high temperature is applied and stirred for a long time, which is not preferable in terms of efficiency or energy efficiency of the manufacturing process.
상기 타피오카전분혼합단계(S103)는 상기 원료혼합단계(S101)를 통해 제조된 혼합물에 타피오카전분을 혼합하고 교반하는 단계로, 상기 원료혼합단계(S101)를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 타피오카전분 10 내지 30 중량부를 혼합하고 1500 내지 2000rpm의 속도로 10 내지 20분 동안 교반하는 과정으로 이루어지는 것이 바람직하다.The tapioca starch mixing step (S103) is a step of mixing and stirring tapioca starch with the mixture prepared through the raw material mixing step (S101), and 100 weight of purified water contained in the mixture prepared through the raw material mixing step (S101). It is preferable to mix 10 to 30 parts by weight of tapioca starch per part and stir for 10 to 20 minutes at a speed of 1500 to 2000 rpm.
상기와 같이 타피오카전분이 함유되면 생분해성 뿐만 아니라, 혼합수지의 점도가 증가되어 성형성이 향상되는데, 일반적인 전분을 사용하는 경우에 비해 기계적 물성이 향상된 혼합수지를 제공한다. 이는 미량의 시안화기를 포함하며서 입자크기가 작은 타피오카전분을 사용하면 상용성이 향상되어 상기 원료혼합단계를 통해 제조된 혼합물에 고르게 혼합되어 균일하고 향상된 물성을 나타내게 되는 것이다.As described above, when tapioca starch is contained, not only biodegradability, but also moldability is improved by increasing the viscosity of the mixed resin, providing a mixed resin with improved mechanical properties compared to the case of using common starch. This is because when tapioca starch containing a small amount of cyanide group and having a small particle size is used, the compatibility is improved and evenly mixed with the mixture prepared through the raw material mixing step to exhibit uniform and improved physical properties.
이때, 상기 타피오카전분의 함량이 10 중량부 미만이면 상기의 효과가 미미하며, 상기 타피오카전분의 함량이 30 중량부를 초과하게 되면 본 발명을 통해 제조되는 혼합수지의 기계적 물성이 지나치게 저하되기 때문에 바람직하지 못하다.At this time, if the content of the tapioca starch is less than 10 parts by weight, the above effect is insignificant, and if the content of the tapioca starch exceeds 30 parts by weight, the mechanical properties of the mixed resin prepared through the present invention are excessively deteriorated, which is not preferable. Can not do it.
상기 첨가제혼합단계(S105)는 상기 타피오카전분혼합단계(S103)를 통해 제조된 혼합물에 소포제와 활성탄을 혼합하고 교반하는 단계로, 상기 타피오카전분혼합단계(S103)를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 소포제 5 내지 15 중량부 및 활성탄 1 내지 2 중량부를 혼합하고 1500 내지 2000rpm의 속도로 10 내지 20분 동안 교반하여 이루어지는 것이 바람직하다.The additive mixing step (S105) is a step of mixing and stirring an antifoaming agent and activated carbon with the mixture prepared through the tapioca starch mixing step (S103), and purified water contained in the mixture prepared through the tapioca starch mixing step (S103). It is preferable to mix 5 to 15 parts by weight of an antifoamer and 1 to 2 parts by weight of activated carbon with respect to 100 parts by weight and stir for 10 to 20 minutes at a speed of 1500 to 2000 rpm.
상기 소포제는 상기 타피오카전분혼합단계(S103)를 통해 제조된 혼합물에 함유된 기포를 제거하여 외관품질이나 기계적 물성이 우수한 혼합수지가 제공될 수 있도록 하는데 상기 소포제의 함량이 5 중량부 미만이면 상기의 효과가 미미하며, 상기 소포제의 함량이 15 중량부를 초과하게 되면 상기의 효과는 크게 향상되지 않으면서 혼합수지의 기계적 물성을 지나치게 저하시키기 때문에 바람직하지 못하다.The antifoaming agent removes air bubbles contained in the mixture prepared through the tapioca starch mixing step (S103) to provide a mixed resin having excellent appearance quality or mechanical properties. If the content of the antifoaming agent is less than 5 parts by weight, the above The effect is insignificant, and when the content of the antifoaming agent exceeds 15 parts by weight, the effect is not greatly improved and the mechanical properties of the mixed resin are excessively deteriorated, which is undesirable.
이때, 상기 소포제는 비실리콘계 소포제를 사용하는 것이 더욱 바람직하다.At this time, it is more preferable to use a non-silicone-based antifoaming agent as the antifoaming agent.
또한, 상기 활성탄은 분말형태로 사용되는 것이 바람직하며, 입자크기가 0.001 내지 0.01 밀리미터를 나탄내는 것이 더욱 바람직한데, 본 발명을 통해 제조되는 혼합수지에 검은색상을 부여하는 천연안료의 역할을 할 뿐만 아니라, 충전재로 작용하여 혼합수지의 기계적 물성을 향상시키는 역할을 한다.In addition, the activated carbon is preferably used in powder form, and more preferably has a particle size of 0.001 to 0.01 millimeters, and serves as a natural pigment that imparts a black color to the mixed resin prepared by the present invention. Rather, it serves as a filler to improve the mechanical properties of the mixed resin.
상기 활성탄의 함량이 1 중량부 미만이면 상기의 효과가 미미하며, 상기 활성탄의 함량이 2 중량부를 초과하게 되면 상기의 효과는 크게 향상되지 않으면서 혼합수지의 기계적 물성이 오히려 저하될 수 있다.If the content of the activated carbon is less than 1 part by weight, the above effect is insignificant, and if the content of the activated carbon exceeds 2 parts by weight, the above effect is not greatly improved and the mechanical properties of the mixed resin may rather deteriorate.
상기 올소규산나트륨혼합단계(S107)는 상기 첨가제혼합단계(S105)를 통해 제조된 혼합물에 올소규산나트륨과 정제수를 혼합하고 교반하는 단계로, 상기 첨가제혼합단계(S105)를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 올소규산나트륨 0.8 내지 10 중량부 및 정제수 15 내지 40 중량부를 혼합하고 25 내지 30℃의 온도에서 1500 내지 2000rpm의 속도로 10 내지 20분 동안 교반하여 이루어지는 것이 바람직하다.The sodium orthosilicate mixing step (S107) is a step of mixing and stirring sodium orthosilicate and purified water with the mixture prepared through the additive mixing step (S105), and contained in the mixture prepared through the additive mixing step (S105). It is preferable to mix 0.8 to 10 parts by weight of sodium orthosilicate and 15 to 40 parts by weight of purified water with respect to 100 parts by weight of purified water and stir for 10 to 20 minutes at a speed of 1500 to 2000 rpm at a temperature of 25 to 30 ° C.
상기의 과정을 통해 올소규산나트륨이 혼합되면 본 발명을 통해 제조되는 혼합수지에 규산성분이 함유되어 내수성능이 부여되는데, 상기 올소규산나트륨의 함량이 0.8 중량부 미만이면 상기의 효과가 미미하며, 상기 올소규산나트륨의 함량이 10 중량부를 초과하게 되면 상기의 효과는 크게 향상되지 않으면서 혼합수지의 기계적 물성이 지나치게 저하되기 때문에 바람직하지 못하다.When sodium orthosilicate is mixed through the above process, a silicic acid component is contained in the mixed resin prepared through the present invention to impart water resistance. If the content of sodium orthosilicate is less than 0.8 parts by weight, the above effect is insignificant, When the content of the sodium orthosilicate exceeds 10 parts by weight, the above effect is not greatly improved and the mechanical properties of the mixed resin are excessively deteriorated, which is undesirable.
상기 올소규산나트륨은 분자식이 2Na2O·SiO2·XH2O이며, 분자량은 284.20이고, 백색분말의 성상을 나타내는데, 28℃의 온도에서 물에 대해 43.5g/100g의 가용성을 나타낸다.The sodium orthosilicate has a molecular formula of 2Na 2 O·SiO 2 ·XH 2 O, a molecular weight of 284.20, and exhibits properties of a white powder, showing a solubility of 43.5g/100g in water at a temperature of 28°C.
또한, 상기 올소규산나트륨의 함량이 0.8 중량부인 경우 혼합수지의 내수성은 2 내지 3개월간 유지되며, 상기 올소규산나트륨의 함량이 10 중량부인 경우에는 혼합수지의 내수성이 4 내지 5년으로 매우 연장된다.In addition, when the sodium orthosilicate content is 0.8 parts by weight, the water resistance of the mixed resin is maintained for 2 to 3 months, and when the sodium orthosilicate content is 10 parts by weight, the water resistance of the mixed resin is greatly extended to 4 to 5 years. .
또한, 상기 올소규산나트륨혼합단계(S107)에서 교반온도가 25℃ 미만이거나 교반시간이 10분 미만이면 상기 첨가제혼합단계(S105)를 통해 제조된 혼합물에 올소규산나트륨이 고르게 혼합되지 못하며, 상기 올소규산나트륨혼합단계(S107)에서 교반온도가 30℃를 초과하거나 교반시간이 20분을 초과하게 되면 상기 첨가제혼합단계(S105)를 통해 제조된 혼합물과 올소규산나트륨의 혼합도는 크게 향상되지 않으면서 제조공정의 효율성을 저하시키고 에너지 효율성적인 측면에서 바람직하지 못하다.In addition, when the stirring temperature is less than 25 ° C or the stirring time is less than 10 minutes in the sodium orthosilicate mixing step (S107), sodium orthosilicate is not evenly mixed with the mixture prepared through the additive mixing step (S105), and the orthosilicate sodium In the sodium silicate mixing step (S107), when the stirring temperature exceeds 30 ° C or the stirring time exceeds 20 minutes, the mixing degree of the mixture prepared through the additive mixing step (S105) and sodium orthosilicate is not significantly improved. It reduces the efficiency of the manufacturing process and is undesirable in terms of energy efficiency.
상기 폐식용유혼합단계(S109)는 상기 올소규산나트륨혼합단계(S107)를 통해 제조된 혼합물에 폐식용유를 혼합하고 교반하는 단계로, 상기 올소규산나트륨혼합단계(S107)를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 폐식용유 1.5 내지 2.5 중량부를 혼합하고 1500 내지 2000rpm의 속도로 10 내지 20분 동안 교반하여 이루어지는 것이 바람직하다.The waste cooking oil mixing step (S109) is a step of mixing and stirring the waste cooking oil with the mixture prepared through the sodium orthosilicate mixing step (S107), contained in the mixture prepared through the sodium orthosilicate mixing step (S107). It is preferably made by mixing 1.5 to 2.5 parts by weight of waste cooking oil with respect to 100 parts by weight of purified water and stirring for 10 to 20 minutes at a speed of 1500 to 2000 rpm.
상기의 폐식용유혼합단계(S109)를 통해 폐식용유가 혼합되면 혼합수지의 유연성이 향상되며, 성형과정에서 금형으로부터 용이하게 분리될 수 있는데, 상기 폐식용유의 함량이 1.5 중량부 미만이면 상기의 효과가 미미하며, 상기 폐식용유의 함랴이 2.5 중량부를 초과하게 되면 상기의 효과는 크게 향상되지 않으면서 혼합수지의 기계적 물성이 저하될 수 있다.When the waste cooking oil is mixed through the waste cooking oil mixing step (S109), the flexibility of the mixed resin is improved and can be easily separated from the mold in the molding process. If the content of the waste cooking oil is less than 1.5 parts by weight, the above effect is insignificant, and when the content of the waste cooking oil exceeds 2.5 parts by weight, the mechanical properties of the mixed resin may be deteriorated without greatly improving the above effect.
이하에서는, 본 발명에 따른 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법 및 그 제조방법으로 제조된 폴리비닐알코올 혼합수지의 물성을 실시예를 들어 설명하기로 한다.Hereinafter, the manufacturing method of the polyvinyl alcohol mixed resin with improved water resistance according to the present invention and the physical properties of the polyvinyl alcohol mixed resin produced by the manufacturing method will be described with examples.
<실시예 1><Example 1>
정제수 600mL에 폴리비닐알코올 150g을 혼합하고 75℃의 온도에서 1250rpm의 속도로 60분 동안 교반하여 혼합물을 제조하고, 제조된 혼합물에 타피오카전분 120g을 혼합하고 1800rpm의 속도로 15분 동안 교반하고, 타피오카전분이 혼합된 혼합물에 소포제 45g과 활성탄 8g을 혼합하고 1800rpm의 속도로 15분 동안 교반하고, 소포제와 활성탄이 혼합된 혼합물에 올소규산나트륨 25g과 정제수 150mL를 혼합하고 28℃의 온도에서 1800rpm의 속도로 15분 동안 교반하고, 올소규산나트륨이 혼합된 혼합물에 폐식용유 25mL를 혼합하고 1800rpm의 속도로 15분 동안 교반하여 내수성이 개선된 폴리비닐알코올 혼합수지를 제조하였다.Mix 150 g of polyvinyl alcohol with 600 mL of purified water and stir at a temperature of 75 ° C. at a speed of 1250 rpm for 60 minutes to prepare a mixture, mix 120 g of tapioca starch with the prepared mixture, stir at a speed of 1800 rpm for 15 minutes, and 45 g of antifoaming agent and 8 g of activated carbon were mixed with the mixture of starch mixture and stirred at 1800 rpm for 15 minutes, and 25 g of sodium orthosilicate and 150 mL of purified water were mixed with the mixture of antifoaming agent and activated carbon with 1800 rpm at 28°C. After stirring for 15 minutes, 25 mL of waste cooking oil was mixed with the mixture mixed with sodium orthosilicate, and stirred at a speed of 1800 rpm for 15 minutes to prepare a polyvinyl alcohol mixed resin having improved water resistance.
<실시예 2><Example 2>
상기 실시예 1과 동일하게 진행하되, 올소규산나트륨 5g을 혼합하여 내수성이 개선된 폴리비닐알코올 혼합수지를 제조하였다.Proceed in the same manner as in Example 1, but by mixing 5 g of sodium orthosilicate to prepare a polyvinyl alcohol mixed resin having improved water resistance.
<실시예 3><Example 3>
상기 실시예 1과 동일하게 진행하되, 올소규산나트륨 50g을 혼합하여 내수성이 개선된 폴리비닐알코올 혼합수지를 제조하였다.Proceed in the same manner as in Example 1, but by mixing 50 g of sodium orthosilicate to prepare a polyvinyl alcohol mixed resin having improved water resistance.
<비교예 1><Comparative Example 1>
정제수 600mL에 폴리비닐알코올 150g을 혼합하고 75℃의 온도에서 1250rpm의 속도로 60분 동안 교반하여 혼합물을 제조하고, 제조된 혼합물에 타피오카전분 120g을 혼합하고 1800rpm의 속도로 15분 동안 교반하고, 타피오카전분이 혼합된 혼합물에 소포제 45g과 활성탄 8g을 혼합하고 1800rpm의 속도로 15분 동안 교반하고, 소포제와 활성탄이 혼합된 혼합물에 폐식용유 25mL를 혼합하고 1800rpm의 속도로 15분 동안 교반하여 폴리비닐알코올 혼합수지를 제조하였다.Mix 150 g of polyvinyl alcohol with 600 mL of purified water and stir at a temperature of 75 ° C. at a speed of 1250 rpm for 60 minutes to prepare a mixture, mix 120 g of tapioca starch with the prepared mixture, stir at a speed of 1800 rpm for 15 minutes, and 45g of antifoaming agent and 8g of activated carbon were mixed with the mixture of starch, stirred at 1800 rpm for 15 minutes, mixed with 25mL of waste cooking oil to the mixture of antifoaming agent and activated carbon, and stirred at 1800rpm for 15 minutes to obtain polyvinyl alcohol. A mixed resin was prepared.
상기 실시예 1 및 비교예 1을 통해 제조된 폴리비닐알코올 혼합수지를 필름의 형태로 제조한 후에 내수성을 측정하여 아래 도 2에 나타내었다.After preparing the polyvinyl alcohol mixed resin prepared in Example 1 and Comparative Example 1 in the form of a film, water resistance was measured and shown in FIG. 2 below.
{단, 내수성은 제조된 폴리비닐알코올 혼합수지를 물에 10분 동안 침지한 후에 변형을 확인하는 방법을 이용하였다.{However, for water resistance, a method of confirming deformation after immersing the prepared polyvinyl alcohol mixed resin in water for 10 minutes was used.
또한, 필름의 제조는 100℃의 온도가 설정된 다축 압출기에 제조된 폴리비닐알코올 혼합수지를 투입하고, 투입된 혼합수지는 압출기에 구비된 노즐에 연결된 다이를 통과하면서 필름으로 형태 변형된 후에 85℃의 캐스팅 드럼에 토출되어 1차 건조과정을 수행하는데, 건조된 필름은 다시 다수의 에어노즐이 상하에 장착된 플로팅 드라이어에서 2차 건조된 후 가장자리의 불균일한 부분이 절단된 다음에 권취기에서 롤에 권취시키는 과정으로 진행하였다.} In addition, in the production of the film, a polyvinyl alcohol mixed resin prepared in a multi-screw extruder set at a temperature of 100 ° C is introduced, and the mixed resin is transformed into a film while passing through a die connected to a nozzle provided in the extruder, and then heated at 85 ° C. It is discharged to the casting drum and undergoes a primary drying process. The dried film is then secondary dried in a floating dryer equipped with a plurality of air nozzles above and below, and then the uneven part of the edge is cut and then rolled in a roll in a winding machine. It proceeded through the winding process.}
아래 도 2에 나타낸 것처럼, 본 발명의 실시예 1을 통해 제조된 폴리비닐알코올 혼합수지는 물에 10분 동안 침지되어도 형태가 유지되는 반면, 비교예 1을 통해 제조된 폴리비닐알코올 혼합수지는 물에 용해되는 것을 알 수 있다.As shown in Figure 2 below, the polyvinyl alcohol mixed resin prepared through Example 1 of the present invention maintains its shape even when immersed in water for 10 minutes, while the polyvinyl alcohol mixed resin prepared through Comparative Example 1 is water It can be seen that it dissolves in
또한, 상기 실시예 1을 통해 제조된 폴리비닐알코올 혼합수지로 제조된 필름, 용기뚜껑 및 빨대를 촬영하여 아래 도 3에 나타내었다.In addition, the film, container lid, and straw made of the polyvinyl alcohol mixed resin prepared in Example 1 were photographed and shown in FIG. 3 below.
아래 도 3에 나타낸 것처럼, 본 발명의 실시예 1을 통해 제조된 폴리비닐알코올 혼합수지는 생분해성을 나타내어 친환경적이면서도 우수한 외관품질을 나타내는 필름, 용기뚜껑 및 빨대로 성형될 수 있다.As shown in Figure 3 below, the polyvinyl alcohol mixed resin prepared through Example 1 of the present invention exhibits biodegradability and can be molded into a film, container lid, and straw showing excellent appearance quality while being environmentally friendly.
또한, 상기 실시예 1 내지 3을 통해 제조된 폴리비닐알코올 혼합수지를 물에 침지한 후에 생분해되는 기간을 측정하여 아래 표 1에 나타내었다.In addition, the biodegradation period after immersing the polyvinyl alcohol mixed resin prepared in Examples 1 to 3 in water was measured and shown in Table 1 below.
{단, 생분해의 조건은 온도가 22℃인 정제수에 24개월간 침지한 후에 생분해 여부를 확인하는 방법을 이용하였다.{However, as for the biodegradation conditions, a method of confirming biodegradation after immersion in purified water at a temperature of 22 ° C. for 24 months was used.
◎:완전생분해, ○:일부생분해, ×:분해안됨}◎: completely biodegradable, ○: partially biodegradable, ×: not degradable}
<표 1><Table 1>
상기 표 1에 나타낸 것처럼, 본 발명의 실시예 1 내지 3을 통해 제조된 폴리비닐알코올 혼합수지는 올소규산나트륨의 함량에 따라 물에서 생분해되는 기간이 달라지는 것을 알 수 있다.As shown in Table 1, it can be seen that the polyvinyl alcohol mixed resin prepared in Examples 1 to 3 of the present invention has a different biodegradation period in water depending on the content of sodium orthosilicate.
따라서, 본 발명에 따른 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법은 내수성 개선으로 인해 수분에 의해 분해되는 기간이 연장되어 일회용품, 빨대, 컵 뚜껑, 농업용 필름 및 농업용멀칭비닐(액상 멀칭) 등으로 적용이 가능하며 수분에 노출된 후에 일정 기간이 경과하면 자연적으로 용해되기 때문에 친환경적인 효과를 나타내는 폴리비닐알코올 혼합수지를 제공한다.Therefore, the manufacturing method of polyvinyl alcohol mixed resin with improved water resistance according to the present invention extends the period of decomposition by moisture due to the improved water resistance, such as disposable products, straws, cup lids, agricultural films and agricultural mulching vinyl (liquid mulching). It can be applied as a polyvinyl alcohol mixture and is naturally dissolved after a certain period of time after being exposed to moisture, so it provides a polyvinyl alcohol mixed resin that exhibits an eco-friendly effect.
S101 ; 원료혼합단계
S103 ; 타피오카전분혼합단계
S105 ; 첨가제혼합단계
S107 ; 올소규산나트륨혼합단계
S109 ; 폐식용유혼합단계S101; Raw material mixing step
S103; Mixing step of tapioca starch
S105; Additive mixing step
S107; Sodium orthosilicate mixing step
S109; Waste cooking oil mixing step
Claims (8)
상기 원료혼합단계를 통해 제조된 혼합물에 타피오카전분을 혼합하고 교반하는 타피오카전분혼합단계;
상기 타피오카전분혼합단계를 통해 제조된 혼합물에 소포제와 활성탄을 혼합하고 교반하는 첨가제혼합단계;
상기 첨가제혼합단계를 통해 제조된 혼합물에 올소규산나트륨과 정제수를 혼합하고 교반하는 올소규산나트륨혼합단계; 및
상기 올소규산나트륨혼합단계를 통해 제조된 혼합물에 폐식용유를 혼합하고 교반하는 폐식용유혼합단계;로 이루어지는 것을 특징으로 하는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법.
A raw material mixing step of mixing and stirring polyvinyl alcohol with purified water;
Tapioca starch mixing step of mixing and stirring tapioca starch in the mixture prepared through the raw material mixing step;
Additive mixing step of mixing and stirring the antifoaming agent and activated carbon to the mixture prepared through the tapioca starch mixing step;
A sodium orthosilicate mixing step of mixing and stirring sodium orthosilicate and purified water to the mixture prepared through the additive mixing step; and
A method for producing a polyvinyl alcohol mixed resin with improved water resistance, characterized in that consisting of a mixing step of mixing waste cooking oil and stirring the mixture prepared through the sodium silicate mixing step.
상기 원료혼합단계는 정제수 100 중량부에 폴리비닐알코올 15 내지 40 중량부를 혼합하여 이루어지는 것을 특징으로 하는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법.
The method of claim 1,
The raw material mixing step is a method for producing a polyvinyl alcohol mixed resin with improved water resistance, characterized in that made by mixing 15 to 40 parts by weight of polyvinyl alcohol with 100 parts by weight of purified water.
상기 원료혼합단계는 70 내지 80℃의 온도에서 1000 내지 1500rpm의 속도로 40 내지 80분 동안 교반하여 이루어지는 것을 특징으로 하는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법.
According to claim 1 or 2,
The raw material mixing step is a method for producing a polyvinyl alcohol mixed resin with improved water resistance, characterized in that stirred for 40 to 80 minutes at a speed of 1000 to 1500 rpm at a temperature of 70 to 80 ℃.
상기 타피오카전분혼합단계는 상기 원료혼합단계를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 타피오카전분 10 내지 30 중량부를 혼합하여 이루어지는 것을 특징으로 하는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법.
The method of claim 1,
The tapioca starch mixing step is performed by mixing 10 to 30 parts by weight of tapioca starch with respect to 100 parts by weight of purified water contained in the mixture prepared through the raw material mixing step. Method for producing polyvinyl alcohol mixed resin with improved water resistance.
상기 첨가제혼합단계는 상기 타피오카전분혼합단계를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 소포제 5 내지 15 중량부 및 활성탄 1 내지 2 중량부를 혼합하여 이루어지는 것을 특징으로 하는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법.
The method of claim 1,
The additive mixing step is polyvinyl alcohol with improved water resistance, characterized in that it is made by mixing 5 to 15 parts by weight of an antifoaming agent and 1 to 2 parts by weight of activated carbon with respect to 100 parts by weight of purified water contained in the mixture prepared through the tapioca starch mixing step. Manufacturing method of mixed resin.
상기 올소규산나트륨혼합단계는 상기 첨가제혼합단계를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 올소규산나트륨 0.8 내지 10 중량부 및 정제수 15 내지 40 중량부를 혼합하여 이루어지는 것을 특징으로 하는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법.
The method of claim 1,
The sodium orthosilicate mixing step is improved water resistance, characterized in that made by mixing 0.8 to 10 parts by weight of sodium orthosilicate and 15 to 40 parts by weight of purified water with respect to 100 parts by weight of purified water contained in the mixture prepared through the additive mixing step. Manufacturing method of polyvinyl alcohol mixed resin.
상기 올소규산나트륨혼합단계는 25 내지 30℃의 온도에서 1500 내지 2000rpm의 속도로 10 내지 20분 동안 교반하여 이루어지는 것을 특징으로 하는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법.
According to claim 1 or 6,
The sodium orthosilicate mixing step is a method for producing a polyvinyl alcohol mixed resin with improved water resistance, characterized in that stirred for 10 to 20 minutes at a speed of 1500 to 2000 rpm at a temperature of 25 to 30 ℃.
상기 폐식용유혼합단계는 상기 올소규산나트륨혼합단계를 통해 제조된 혼합물에 함유된 정제수 100 중량부 대비 폐식용유 1.5 내지 2.5 중량부를 혼합하여 이루어지는 것을 특징으로 하는 내수성이 개선된 폴리비닐알코올 혼합수지의 제조방법.The method of claim 1,
The waste cooking oil mixing step is prepared by mixing 1.5 to 2.5 parts by weight of waste cooking oil with respect to 100 parts by weight of purified water contained in the mixture prepared through the sodium orthosilicate mixing step. Way.
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