KR20040033843A - Synthetic resin containing powdered amethyst for radiating far-infrared and maunfacturing method therefor - Google Patents
Synthetic resin containing powdered amethyst for radiating far-infrared and maunfacturing method therefor Download PDFInfo
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- KR20040033843A KR20040033843A KR1020020063119A KR20020063119A KR20040033843A KR 20040033843 A KR20040033843 A KR 20040033843A KR 1020020063119 A KR1020020063119 A KR 1020020063119A KR 20020063119 A KR20020063119 A KR 20020063119A KR 20040033843 A KR20040033843 A KR 20040033843A
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- 239000010975 amethyst Substances 0.000 title claims abstract description 32
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 29
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 10
- -1 polypropylene Polymers 0.000 claims abstract description 17
- 239000000843 powder Substances 0.000 claims abstract description 17
- 239000004743 Polypropylene Substances 0.000 claims abstract description 13
- 229920001155 polypropylene Polymers 0.000 claims abstract description 13
- 239000002270 dispersing agent Substances 0.000 claims abstract description 12
- 229920005989 resin Polymers 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 12
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 7
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 5
- 239000004698 Polyethylene Substances 0.000 claims abstract description 4
- 235000019359 magnesium stearate Nutrition 0.000 claims abstract description 4
- 229920000573 polyethylene Polymers 0.000 claims abstract description 4
- 239000004677 Nylon Substances 0.000 claims abstract description 3
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims abstract description 3
- 235000013539 calcium stearate Nutrition 0.000 claims abstract description 3
- 239000008116 calcium stearate Substances 0.000 claims abstract description 3
- 229920001778 nylon Polymers 0.000 claims abstract description 3
- 238000003756 stirring Methods 0.000 claims abstract description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims abstract description 3
- 230000005855 radiation Effects 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 9
- 238000001125 extrusion Methods 0.000 claims description 6
- 229920005672 polyolefin resin Polymers 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000000704 physical effect Effects 0.000 abstract description 6
- 230000000844 anti-bacterial effect Effects 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 230000001877 deodorizing effect Effects 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 4
- 150000001336 alkenes Chemical class 0.000 abstract 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004332 deodorization Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000003814 drug Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 241000282412 Homo Species 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000000845 anti-microbial effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 229920005669 high impact polystyrene Polymers 0.000 description 1
- 239000004797 high-impact polystyrene Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 230000000191 radiation effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 229920000468 styrene butadiene styrene block copolymer Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000003440 toxic substance Substances 0.000 description 1
- 239000010891 toxic waste Substances 0.000 description 1
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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
-
- 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
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—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 aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Description
본 발명은 폴리프로필렌과 자수정 분말을 혼합하여 폴리프로필렌 물성을 그대로 유지하면서도 원적외선 방사효율이 높게 한 자수정을 함유한 원적외선 방사용 합성수지 및 그 제조방법에 관한 것이다.The present invention relates to a synthetic resin for far-infrared radiation containing amethyst having a high far-infrared radiation efficiency while maintaining polypropylene properties by mixing polypropylene and amethyst powder, and a manufacturing method thereof.
합성수지(플라스틱)는 비교적 가격이 저렴하고, 가공성이 좋아 일반 잡화는 물론 포장용, 농업용 등 여러 분야에서 이용되고 있으며, 그 수요량의 증가와 함께 기능성을 부가시킨 고급제품들이 요구되고 있으며, 열가소성 수지의 열용융성에 의해 여러가지 물질을 함께 혼합하여 콤파운딩화하므로서 응용분야가 넓어지면서 인체에 대하여 독성이 없는 친화적인 소재들이 개발되고 있으며, 그 중에서도 원적외선 방사소재를 혼합한 소재들의 연구가 활발히 진행되고 있다.Synthetic resins (plastics) are relatively inexpensive and have good processability. They are used in various fields such as general goods as well as packaging and agriculture, and there are demands for high-quality products that add functionality with increasing demand. Various materials are mixed together to be compounded by meltability, and as the application area is widened, friendly materials having no toxicity to humans are being developed, and among them, researches on materials mixed with far-infrared radiation materials are being actively conducted.
원적외선은 인체에 가장 유익한 파장(8∼11㎛)으로 피부속 4∼5㎝까지 침투하여 수분과 단백질 분자에 방사되어 세포를 진동시켜 세포조직을 활성화시키므로서 각종 유독성 물질과 노폐물등을 배출시킴과 함께 탈취, 항균효과가 있는 유용한 파장으로 각종 조사 및 연구에서 알려진 바 있으며, 이를 이용하여 각종 생활용품, 의료보조기구, 섬유등에 널리 이용되고 있다.Far infrared rays penetrate 4 ~ 5cm in the skin with the most beneficial wavelength (8 ~ 11㎛) to the human body and radiate to moisture and protein molecules to vibrate the cells to activate cell tissues and release various toxic substances and wastes. In addition, it has been known in various investigations and studies as a useful wavelength having a deodorant, antibacterial effect, and is widely used in various household goods, medical aids, textiles, etc. by using this.
이러한 원적외선을 다량으로 방출하는 소재로는 현재까지 산화실리콘(SiO2), 산화알루미늄(Al2O3), 산화제2철(Fe2O3)등이 알려져 있다.As a material emitting a large amount of such far infrared rays, silicon oxide (SiO 2 ), aluminum oxide (Al 2 O 3 ), ferric oxide (Fe 2 O 3 ), and the like have been known to date.
근자들어 전기한 소재외에 한국산 자수정이 평균 40℃의 온도에서 원적외선이 91%를 방출하는 것으로 밝혀지고 불순물이 함유되지 않은 것으로 알려지고 있다.In addition to the materials described above, Korean amethyst emits 91% of far-infrared rays at an average temperature of 40 ℃ and is known to contain no impurities.
특히 자수정은 원적외선의 다량 방사는 물론 예로부터 동의보감등의 한의학서에 의약용으로 소개되는 등 건강용품으로 이미 사용되고 있다.In particular, amethyst has already been used as a health care product, such as a large amount of far-infrared radiation, as well as being introduced as a medicine in traditional Chinese medicine such as consent bokgam.
그러므로 근자에는 자수정활석 등 합성수지에 함유시켜 생활용품으로 사용코저 하는 방법이 시도되고 있으나, 합성수지 자체의 물성저하등으로 인하여 효과를 보지 못하고 있다.Therefore, in recent years, there have been attempts to contain a synthetic resin such as amethyst, and use it as a daily necessity. However, due to the deterioration in physical properties of the synthetic resin itself, it has not been effective.
이에 본 발명은 전기한 자수정을 물성저하없이 합성수지에 적용코저 한 것으로서, 자수정을 최대 40wt%까지 함유하면서도 그 물성이 변화없이 동일하거나 더욱 향상된 물성의 플라스틱 콤파운드를 시스템의 변화없이 자수정이 함유된 합성수지를 칩형태로 제공하여 인체에 유익한 원적외선 방사효과와 탈취율과 항균성을 높히면서도 가공성이 우수한 합성수지를 제공함에 발명의 목적이 있다.Therefore, the present invention is applied to a synthetic resin without deteriorating the properties of the amethyst, the synthetic resin containing amethyst up to 40wt%, but the same or more improved physical properties of the plastic compound without changing the physical properties of the amethyst without changing the system It is an object of the invention to provide a synthetic resin excellent in processability while increasing the far-infrared radiation effect, deodorization rate and antimicrobial properties beneficial to the human body by providing it in the form of a chip.
이하, 본 발명의 목적을 이루기 위한 기술적 수단을 설명한다.Hereinafter, the technical means for achieving the object of the present invention will be described.
자수정을 함유한 원적외선 방사용 합성수지는 자수정분말을 0.1∼40wt%, 합성수지를 60∼95wt%, 분산제를 전체 중량대비 3%를 혼합하여 용융압출형성한 것이다.Synthetic resin for far-infrared radiation containing amethyst is melt-extruded by mixing 0.1-40 wt% of amethyst powder, 60-95 wt% of synthetic resin, and 3% of the dispersant by weight.
상기한 자수정 분말을 함유한 원적외선 방사용 합성수지의 제조방법은 자수정분말을 0.1∼40wt%, 합성수지를 60∼95wt% 혼합하는 원료혼합공정과,The method for producing a synthetic resin for far-infrared radiation containing the amethyst powder described above comprises a raw material mixing step of mixing 0.1 to 40 wt% of amethyst powder and 60 to 95 wt% of a synthetic resin;
혼합원료에 분산제를 전체 중량대비 3%를 첨가하는 첨가공정과,An addition step of adding 3% of the dispersant to the mixed raw material by weight;
혼합원료와 분산제를 교반기에 넣고 300rpm으로 고속회전시키는 교반공정과,A stirring step of putting the mixed raw material and the dispersant in a stirrer and rotating at high speed at 300 rpm;
교반기에 의해 균일하게 혼합한 원료를 170∼200℃의 압출기내에 넣고 용융 압출시키는 압출공정과, 압출되는 재료를 절단과 동시에 냉각시키는 냉각공정으로 된다.It consists of an extrusion process which puts the raw material uniformly mixed by the stirrer in the extruder of 170-200 degreeC, and melt-extrudes, and the cooling process which cools the material to be extruded simultaneously with cutting | disconnection.
이하, 전기한 제조방법을 실시예에 의해 상세히 설명한다.Hereinafter, the above-described manufacturing method will be described in detail by way of examples.
(실시예 1)(Example 1)
자수정 분말 1wt%과 폴리프로필렌수지 99wt%를 서로 혼합하고, 이에 마그네슘 스테아레이트등의 분산제를 전체 중량대비 3%를 첨가하여 고속교반기에 넣고 300rpm의 고속으로 2분간 교반시킨 후, 이를 압출기에 넣고, 압출온도 170∼200℃,스크류회전속도 200rpm으로 용융압출하면서 이를 컷팅 냉각하여 칩(Chip)형태로 형성하였다.1wt% of the amethyst powder and 99wt% of the polypropylene resin are mixed with each other, and 3% of the dispersant such as magnesium stearate is added to a high-speed stirrer, stirred at a high speed of 300 rpm for 2 minutes, and then put into an extruder. Extrusion temperature 170 ~ 200 ℃, while screw extrusion at a screw rotational speed of 200rpm was cut and cooled to form a chip (Chip) form.
(실시예 2)(Example 2)
자수정 분말 10wt%과 폴리프로필렌수지 90wt%를 서로 혼합하고, 나머지 공정은 실시예 1과 동일하게 하였다.10 wt% of the amethyst powder and 90 wt% of the polypropylene resin were mixed with each other, and the remaining process was the same as in Example 1.
(실시예 3)(Example 3)
자수정 분말 20wt%과 폴리프로필렌수지 80wt%를 서로 혼합하고, 나머지 공정은 역시 실시예 1과 동일하게 하였다.20 wt% of the amethyst powder and 80 wt% of the polypropylene resin were mixed with each other, and the remaining process was the same as in Example 1.
(실시예 4)(Example 4)
자수정 분말 30wt%과 폴리프로필렌수지 70wt%를 서로 혼합하고, 나머지 공정은 역시 실시예 1과 동일하게 하였다.30 wt% of the amethyst powder and 70 wt% of the polypropylene resin were mixed with each other, and the rest of the process was the same as in Example 1.
(실시예 5)(Example 5)
자수정 분말 40wt%과 폴리프로필렌수지 60wt%를 서로 혼합하고, 나머지 공정은 역시 실시예 1과 동일하게 하였다.40 wt% of the amethyst powder and 60 wt% of the polypropylene resin were mixed with each other, and the rest of the process was the same as in Example 1.
이상의 실시예에 의하여 제조된 자수정 분말을 함유한 원적외선 방사용 합성수지를 각종 수치를 측정한 결과 다음표와 같은 결과를 얻었다.As a result of measuring various numerical values of the synthetic resin for far-infrared radiation containing the amethyst powder prepared according to the above example, the following results were obtained.
[단위%, ㎏, ㎠, ㎏㎝/㎝][Unit%, kg, cm 2, kg cm / cm]
이상에서와 같이 폴리프로필렌의 물성은 그대로 유지하면서도 원적외선 방사율과 탈취율이 월등히 향상되었음을 확인할 수 있었다.As described above, it was confirmed that far-infrared emissivity and deodorization rate were significantly improved while maintaining the physical properties of polypropylene.
또한 상기 실시예에서는 합성수지 재료를 폴로프로필렌을 사용하였지만, 폴리프로필렌외에도 폴리에틸렌 등의 오레핀계수지, ABS, SBS, HIPS등의 스틸렌계수지, 나일론수지등을 사용하여도 동일한 효과를 볼 수 있다.In addition, in the above embodiment, polypropylene is used as the synthetic resin material, but in addition to polypropylene, the same effect can be obtained by using olefin resin such as polyethylene, styrene resin such as ABS, SBS, HIPS, and nylon resin.
합성수지내에서 자수정의 분산성과 유동성을 향상시키는 분산제 역시 마그네슘 스테아레이트, 아연스테아레이트, 칼슘스테아레이트, 폴리프로필렌왁스, 폴리에틸렌왁스 중의 하나를 사용하여도 같은 효과를 볼 수 있다.Dispersants that improve the dispersibility and fluidity of amethyst in synthetic resins can also have the same effect by using one of magnesium stearate, zinc stearate, calcium stearate, polypropylene wax, and polyethylene wax.
이상과 같이 본 발명에 의한 자수정 분말을 함유한 원적외선 방사용 합성수지는 원적외선 방사율이 뛰어나고, 불순물이 함유되지 않은 자수정 분말을 40%까지 함유하므로서 원적외선 방사율이 90% 이상인 합성수지를 제공하면서도 그 물성은 저하되지 않고, 항균, 탈취력이 뛰어나 이를 필요로 하는 모든 생활용품, 의료, 식품용기, 포장제품 등으로 사용하여 인체건강에 유익하게 하는 효과가 있다.As described above, the synthetic resin for far-infrared radiation containing the amethyst powder according to the present invention has excellent far-infrared emissivity and contains up to 40% of the amethyst powder containing no impurities, thereby providing a synthetic resin having a far-infrared emissivity of 90% or more, but the physical properties thereof are not deteriorated. Without, antibacterial, deodorizing power is excellent in all the household goods, medical, food containers, packaging products, etc. that require it is beneficial to human health.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930010095A (en) * | 1991-11-21 | 1993-06-22 | 이대원 | Far Infrared Radiation Transparent Resin Composition |
| JPH09157533A (en) * | 1995-12-04 | 1997-06-17 | Koken Kk | Industrial material comprising organic polymeric material and article made thereof |
| KR20000036653A (en) * | 2000-03-24 | 2000-07-05 | 박종운 | plastic composition and the manufacturing method thereof |
| KR20000066632A (en) * | 1999-04-19 | 2000-11-15 | 김준섭 | General-purpose plastic containing yellow ocher and preparation thereof |
| KR20010113592A (en) * | 2001-11-17 | 2001-12-28 | 이정석 | the Method for Fabricating the Functional Complexed Resin |
| KR20030096514A (en) * | 2002-06-12 | 2003-12-31 | 주식회사 세경 | Method for manufacturing functional synthetic resins |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR930010095A (en) * | 1991-11-21 | 1993-06-22 | 이대원 | Far Infrared Radiation Transparent Resin Composition |
| JPH09157533A (en) * | 1995-12-04 | 1997-06-17 | Koken Kk | Industrial material comprising organic polymeric material and article made thereof |
| KR20000066632A (en) * | 1999-04-19 | 2000-11-15 | 김준섭 | General-purpose plastic containing yellow ocher and preparation thereof |
| KR20000036653A (en) * | 2000-03-24 | 2000-07-05 | 박종운 | plastic composition and the manufacturing method thereof |
| KR20010113592A (en) * | 2001-11-17 | 2001-12-28 | 이정석 | the Method for Fabricating the Functional Complexed Resin |
| KR20030096514A (en) * | 2002-06-12 | 2003-12-31 | 주식회사 세경 | Method for manufacturing functional synthetic resins |
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