JP2018068850A - Manufacturing method of resin dish - Google Patents
Manufacturing method of resin dish Download PDFInfo
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- JP2018068850A JP2018068850A JP2016214786A JP2016214786A JP2018068850A JP 2018068850 A JP2018068850 A JP 2018068850A JP 2016214786 A JP2016214786 A JP 2016214786A JP 2016214786 A JP2016214786 A JP 2016214786A JP 2018068850 A JP2018068850 A JP 2018068850A
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- 229920005989 resin Polymers 0.000 title claims abstract description 53
- 239000011347 resin Substances 0.000 title claims abstract description 53
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 24
- 229920000877 Melamine resin Polymers 0.000 claims abstract description 57
- 239000004640 Melamine resin Substances 0.000 claims abstract description 44
- 239000012778 molding material Substances 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 27
- 238000000465 moulding Methods 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 12
- 230000000996 additive effect Effects 0.000 claims abstract description 11
- 238000003303 reheating Methods 0.000 claims description 5
- 238000000748 compression moulding Methods 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 7
- 238000002845 discoloration Methods 0.000 abstract description 6
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 12
- 239000000203 mixture Substances 0.000 description 8
- 230000005856 abnormality Effects 0.000 description 6
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- MBHRHUJRKGNOKX-UHFFFAOYSA-N [(4,6-diamino-1,3,5-triazin-2-yl)amino]methanol Chemical compound NC1=NC(N)=NC(NCO)=N1 MBHRHUJRKGNOKX-UHFFFAOYSA-N 0.000 description 2
- 239000011256 inorganic filler Substances 0.000 description 2
- 229910003475 inorganic filler Inorganic materials 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 239000012766 organic filler Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 238000010971 suitability test Methods 0.000 description 2
- BKZMMZQRBMSNSL-UHFFFAOYSA-N C1(=CC=CC=C1)O.C(O)NC1=NC(=NC(=N1)N)N Chemical compound C1(=CC=CC=C1)O.C(O)NC1=NC(=NC(=N1)N)N BKZMMZQRBMSNSL-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- IXYWGDAONWUVER-UHFFFAOYSA-N [(4,6-diamino-1,3,5-triazin-2-yl)amino]methanol;urea Chemical compound NC(N)=O.NC1=NC(N)=NC(NCO)=N1 IXYWGDAONWUVER-UHFFFAOYSA-N 0.000 description 1
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- IVJISJACKSSFGE-UHFFFAOYSA-N formaldehyde;1,3,5-triazine-2,4,6-triamine Chemical compound O=C.NC1=NC(N)=NC(N)=N1 IVJISJACKSSFGE-UHFFFAOYSA-N 0.000 description 1
- 230000009191 jumping Effects 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000012643 polycondensation polymerization Methods 0.000 description 1
- 239000004848 polyfunctional curative Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Landscapes
- Table Devices Or Equipment (AREA)
- Cookers (AREA)
Abstract
Description
本発明は、電子レンジによる加熱に対応可能な樹脂製食器の製造方法に関するものである。 The present invention relates to a method for producing a resin tableware that can be heated by a microwave oven.
従来より、電子レンジによる加熱に対応可能なメラミン樹脂組成物が公知である。例えば、メラミン樹脂と添加材を含有する電子レンジ対応食器用メラミン樹脂組成物において、樹脂成分として組成物全量に対して４から３５質量％の高靭性メラミン樹脂を含有し、かつ添加材として組成物全量に対して７から３５質量％のポリテトラフルオロエチレン樹脂を含有するメラミン樹脂組成物が公知である（特許文献１参照）。 Conventionally, melamine resin compositions that can be heated by a microwave oven are known. For example, in a melamine resin composition for microwave ovens containing a melamine resin and an additive, the resin component contains 4 to 35% by mass of a tough melamine resin based on the total amount of the composition, and the composition is used as an additive. A melamine resin composition containing 7 to 35% by mass of polytetrafluoroethylene resin based on the total amount is known (see Patent Document 1).
しかしながら、特許文献１の構造では、メラミン樹脂組成物を圧縮成形、例えば、温度１６０℃、圧力２０ＭＰａ、成形時間９０秒の成形条件のみによって、直径１２０ｍｍの皿を成形するため、ＪＩＳ規格による電子レンジ高周波適正性試験には適合するものの、樹脂製食器中に残留する未反応のメラミン樹脂の含有量が懸念され、電子レンジで加熱した際に縮合水に起因するクラックの発生、変色が懸念されるものであった。 However, in the structure of Patent Document 1, a melamine resin composition is compression-molded, for example, a 120 mm diameter dish is molded only under molding conditions of a temperature of 160 ° C., a pressure of 20 MPa, and a molding time of 90 seconds. Although it conforms to the high frequency suitability test, there is a concern about the content of unreacted melamine resin remaining in the resin tableware, and there are concerns about the occurrence of cracks and discoloration caused by condensed water when heated in a microwave oven. It was a thing.
そこで、本発明はこのような問題点を解決するものであって、樹脂製食器中に残留する未反応のメラミン樹脂の含有量を減少させ、電子レンジの加熱時における縮合水に起因するクラックの発生、変色を防止することができる樹脂製食器の製造方法を提供することを課題とする。 Accordingly, the present invention solves such problems, and reduces the content of unreacted melamine resin remaining in the resin tableware, and prevents cracks caused by condensed water during heating of the microwave oven. It aims at providing the manufacturing method of the resin tableware which can prevent generation | occurrence | production and discoloration.
前記問題点を解決するために、本発明の請求項１に記載の樹脂製食器の製造方法は、１ＭＨｚでの誘電率が６. １〜７. ６のメラミン樹脂、または添加材を含有したメラミン樹脂成形材料に予熱処理を施す工程と、前記メラミン樹脂成形材料を食器形状へ圧縮成形して成形品とする成形工程とを含むことを特徴とするものである。 In order to solve the above problems, the method for producing a resin tableware according to claim 1 of the present invention is a melamine resin having a dielectric constant of 6.1 to 7.6 at 1 MHz or a melamine containing an additive. It includes a step of pre-heat-treating the resin molding material, and a molding step of compression-molding the melamine resin molding material into a tableware shape to form a molded product.
また、本発明の請求項２に記載の樹脂製食器の製造方法は、１ＭＨｚでの誘電率が６. １〜７. ６のメラミン樹脂、または添加材を含有したメラミン樹脂成形材料に予熱処理を施す工程と、前記メラミン樹脂成形材料を食器形状へ圧縮成形して成形品とする成形工程と、前記成形品に再加熱処理を施す熱処理工程とを含むことを特徴とするものである。 Moreover, the manufacturing method of the resin tableware of Claim 2 of this invention pre-heat-processes the melamine resin molding material containing the melamine resin whose dielectric constant in 6.1 MHz is 6.1-7.6, or an additive. A step of applying, a molding step of compression molding the melamine resin molding material into a tableware shape to form a molded product, and a heat treatment step of subjecting the molded product to a reheating treatment.
また、本発明の請求項３に記載の樹脂製食器の製造方法は、請求項１に記載の樹脂製食器の製造方法において、前記成形品の肉厚は、２．６〜３．１ｍｍに設定されるものである。 Moreover, the manufacturing method of the resin tableware of Claim 3 of this invention is a manufacturing method of the resin tableware of Claim 1, The wall thickness of the said molded article is set to 2.6-3.1 mm It is what is done.
また、発明の請求項４に記載の樹脂製食器の製造方法は、請求項２に記載の樹脂製食器の製造方法において、前記成形品の肉厚は、２．６〜４．０ｍｍに設定されるものである。 Moreover, the manufacturing method of the resin tableware of Claim 4 of invention is the manufacturing method of the resin tableware of Claim 2, The thickness of the said molded article is set to 2.6-4.0 mm. Is.
また、本発明の請求項５に記載の樹脂製食器の製造方法は、請求項１〜４のいずれか１項に記載の樹脂製食器の製造方法において、前記成形品は、電子レンジ加熱用とされるものである。 Moreover, the manufacturing method of the resin tableware of Claim 5 of this invention is a manufacturing method of the resin tableware of any one of Claims 1-4. WHEREIN: The said molded article is for microwave oven heating. It is what is done.
本発明の樹脂製食器の製造方法では、メラミン樹脂成形材料に予熱処理を施すとともに、圧縮成形後の成形品に対して再加熱処理を施すので、樹脂製食器中に残留する未反応のメラミン樹脂の含有量を減少させ、電子レンジの加熱時における縮合水に起因するクラックの発生、変色を防止することができる。 In the method for producing resin tableware according to the present invention, pre-heat treatment is performed on the melamine resin molding material and re-heating treatment is performed on the molded product after compression molding, so that unreacted melamine resin remaining in the resin tableware Thus, the generation of cracks and discoloration due to condensed water during heating of the microwave oven can be prevented.
以下、本発明の実施の形態における樹脂製食器の製造方法を説明する。 Hereinafter, the manufacturing method of the resin tableware in embodiment of this invention is demonstrated.
本発明の製造方法は、１ＭＨｚでの誘電率が６. １〜７. ６のメラミン樹脂、または添加材を含有したメラミン樹脂成形材料に予熱処理を施し、このメラミン樹脂成形材料を食器形状へ圧縮成形して成形品とするものである。 In the production method of the present invention, a melamine resin having a dielectric constant of 6.1 to 7.6 at 1 MHz or a melamine resin molding material containing an additive is preheated, and the melamine resin molding material is compressed into a tableware shape. It is molded into a molded product.
さらに、本発明の製造方法は、上記予熱処理を施したメラミン樹脂成形材料を食器形状へ圧縮成形した後に、この成形品に再加熱処理を施すものである。 Furthermore, in the manufacturing method of the present invention, the pre-heat-treated melamine resin molding material is compression-molded into a tableware shape, and then the molded product is reheated.
これにより、樹脂製食器中に残留する未反応のメラミン樹脂の含有量を減少させ、電子レンジの加熱時における縮合水に起因するクラックの発生、変色を防止することができる。樹脂製食器としては、皿、盆、コップ、湯呑み、小鉢、椀、丼、弁当箱、シール容器等とされる。 Thereby, the content of unreacted melamine resin remaining in the resin tableware can be reduced, and the occurrence of cracks and discoloration due to condensed water during heating of the microwave oven can be prevented. Examples of resin tableware include dishes, trays, cups, cups, small bowls, bowls, bowls, lunch boxes, and seal containers.
本発明に係る樹脂製食器のメラミン系樹脂成形材料に使用されるメラミン系樹脂は、例えば、メチロール化メラミン樹脂、メチロール化メラミン−フェノール共縮合樹脂、メチロール化メラミン−ユリア共縮合樹脂、メチロール化メラミン−エポキシ共縮合樹脂等のトリアジン類とホルムアルデヒド類等を共縮合して得られる合成樹脂を用いることができるが、これに限られるものではない。具体的には、例えば、粉末状メラミンホルムアルデヒド縮重合樹脂（パナソニック株式会社製「ＣＰ９０１２」）等を用いることができる。 Examples of the melamine resin used for the melamine resin molding material of the resin tableware according to the present invention include methylol melamine resin, methylol melamine-phenol co-condensation resin, methylol melamine-urea co-condensation resin, and methylol melamine. -Synthetic resins obtained by cocondensation of triazines such as epoxy cocondensation resins with formaldehyde can be used, but are not limited thereto. Specifically, for example, powdered melamine formaldehyde condensation polymerization resin (“CP9012” manufactured by Panasonic Corporation) or the like can be used.
また、添加材は、主となるメラミン系樹脂成形材料の誘電率を低下させることができる樹脂材料であれば、特に制限されるものではない。この添加材を配合することで、電子レンジ高周波適正性を向上させることができ、特に、シリコーンエラストマーを配合することで、耐熱性、電子レンジ耐久性を向上させることができ、効果的である。 The additive is not particularly limited as long as it is a resin material that can lower the dielectric constant of the main melamine-based resin molding material. By blending this additive, the microwave high frequency suitability can be improved. Particularly, by blending a silicone elastomer, the heat resistance and the microwave durability can be improved, which is effective.
また、メラミン系樹脂成形材料には、本発明の効果を損なわない範囲内において、さらに他の成分を配合することができる。例えば、αセルロース、メラミン樹脂等の有機フィラー、硫酸バリウム等の無機フィラー、無水フタル酸等の硬化材、ステアリン酸、ステアリン酸亜鉛、カルボキシル基含有ポリオレフィン等の離型材、可塑材、着色材等を用いることができる。 In addition, the melamine-based resin molding material can further contain other components within a range not impairing the effects of the present invention. For example, organic fillers such as α cellulose and melamine resin, inorganic fillers such as barium sulfate, hardeners such as phthalic anhydride, mold release materials such as stearic acid, zinc stearate, and carboxyl group-containing polyolefin, plasticizers, colorants, etc. Can be used.
このような添加材が添加されたメラミン系樹脂成形材料は、次のようにして調製することができる。まず、上記のメラミン樹脂、添加材、及び他の成分を配合し、ボールミルで均一に粉砕して混合する。次に、この混合物をロールを用いて板状体とし、この板状体を粉砕することによって、粒状のメラミン系樹脂成形材料を調製することができる。また、この混合物をニーダーやロールで加熱、混練した後に冷却固化し、得られた固化物を粉砕することによって、粉粒状のメラミン系樹脂成形材料として調製することもできる。 The melamine-based resin molding material to which such an additive is added can be prepared as follows. First, the above melamine resin, additives, and other components are blended, and uniformly pulverized and mixed with a ball mill. Next, a granular melamine-based resin molding material can be prepared by making this mixture into a plate-like body using a roll and pulverizing the plate-like body. Further, the mixture can be heated and kneaded with a kneader or a roll and then solidified by cooling, and the obtained solidified product can be pulverized to prepare a powdery melamine resin molding material.
そして、このようなメラミン系樹脂成形材料は、圧縮成形法で成形されて樹脂製食器とされる。メラミン系樹脂成形材料には、例えば、メラミン系樹脂、有機フィラーとしてシリコーンエラストマー、αセルロース及びメラミン樹脂が配合され、無機フィラーとして硫酸バリウムが配合された、誘電率６.１〜６.４のメラミン樹脂材料ＭＭ−Ｋ１５４０２（パナソニック株式会社製）、誘電率６.９〜７.６のメラミン樹脂材料ＭＭ−Ｋ１６０６１（パナソニック株式会社製）等が使用される。 And such a melamine-type resin molding material is shape | molded by the compression molding method, and is set as resin tableware. Melamine-based resin molding materials include, for example, melamine-based resin, melamine having a dielectric constant of 6.1 to 6.4, in which silicone elastomer, α-cellulose, and melamine resin are blended as organic filler, and barium sulfate is blended as inorganic filler. A resin material MM-K15402 (manufactured by Panasonic Corporation), a melamine resin material MM-K16061 (manufactured by Panasonic Corporation) having a dielectric constant of 6.9 to 7.6, or the like is used.
圧縮成形法においては、例えば、上記メラミン系樹脂成形材料を１６０から１７５℃程度に加熱した金型に供給し、所定時間、加圧することで成形する。成形時においては、１次成形、２次成形等、複数回に分けて成形することもできる。例えば、１次成形にて、２０ＭＰａを７０秒、２次成形にて、２０ＭＰａを１５秒、３次成形にて、２０ＭＰａを３０秒、加圧して成形する。そして、金型から半成形品を取り出し、バリを取り除く等の仕上げ加工を行い、成形品とする。 In the compression molding method, for example, the melamine-based resin molding material is supplied to a mold heated to about 160 to 175 ° C. and molded by pressing for a predetermined time. At the time of molding, primary molding, secondary molding, and the like can be performed in a plurality of times. For example, in the primary forming, 20 MPa is applied for 70 seconds, in the secondary forming, 20 MPa is applied for 15 seconds, and in the tertiary forming, 20 MPa is applied under pressure for 30 seconds. Then, a semi-molded product is taken out from the mold, and finish processing such as removing burrs is performed to obtain a molded product.
このとき、以下の表１に示す実施例１〜４においては、メラミン系樹脂成形材料の段階で熱処理を行う予熱処理工程、成形品の段階で熱処理を行う再加熱処理の組み合わせによって区分けしている。 At this time, in Examples 1 to 4 shown in Table 1 below, the heat treatment is performed at the stage of the melamine resin molding material, and the heat treatment is performed at the stage of the molded product, and the reheating process is performed at the stage of the molded product. .
実施例１、２においては、上記誘電率６.１〜６.４のメラミン樹脂材料ＭＭ−Ｋ１５４０２（パナソニック株式会社製）を使用し、実施例３、４においては、上記誘電率６.９〜７.６のメラミン樹脂材料ＭＭ−Ｋ１６０６１（パナソニック株式会社製）を使用した。 In Examples 1 and 2, the melamine resin material MM-K15402 (manufactured by Panasonic Corporation) having the dielectric constant of 6.1 to 6.4 is used, and in Examples 3 and 4, the dielectric constant of 6.9 to A 7.6 melamine resin material MM-K16061 (manufactured by Panasonic Corporation) was used.
予熱処理工程においては、容量５ｋＷのヒーターによってメラミン系樹脂成形材料を圧縮成形前に予め加熱するものである。また、加熱時間においては、成形後における成形品の板厚によって適宜調節するものとし、板厚２．６〜３．４ｍｍの成形品を成形するメラミン系樹脂成形材料においては加熱時間を５０〜７０秒とし、板厚２．６〜４．０ｍｍの成形品を成形するメラミン系樹脂成形材料においては加熱時間を５０〜９０秒とする。また、再熱処理工程においては、処理温度を１２０℃、処理時間を１０時間として、圧縮成形後の成形品を再加熱するものである。 In the pre-heat treatment step, the melamine-based resin molding material is heated in advance by a heater having a capacity of 5 kW before compression molding. The heating time is appropriately adjusted according to the thickness of the molded product after molding, and the heating time is 50 to 70 for a melamine-based resin molding material for molding a molded product having a thickness of 2.6 to 3.4 mm. The heating time is 50 to 90 seconds in a melamine-based resin molding material for molding a molded product having a plate thickness of 2.6 to 4.0 mm. In the reheat treatment step, the molded product after compression molding is reheated at a treatment temperature of 120 ° C. and a treatment time of 10 hours.
また、実施例１〜４の各試験体について、ＪＩＳ Ｓ２０２９に規定する電子レンジ高周波適正性試験に基づいて試験を行った。この試験は、試験体を電子レンジの受皿に載置し、高周波出力６００Ｗで所定時間加熱するものである。上記ＪＩＳ規格に基づき、高周波出力６００Ｗに応じた加熱時間３.５分(２１０秒)で試験を行った。 Moreover, about each test body of Examples 1-4, the test was done based on the microwave oven high frequency suitability test prescribed | regulated to JISS2029. In this test, a test body is placed on a tray of a microwave oven and heated at a high frequency output of 600 W for a predetermined time. Based on the above JIS standard, the test was conducted with a heating time of 3.5 minutes (210 seconds) corresponding to a high frequency output of 600 W.
そして、加熱時に試験体からのスパークの有無及び使用上の欠点となる異常の有無を目視によって調べた。また、加熱時間２１０秒経過後に異常等が見られなかった試験体については、クラックが発見されるまで加熱を継続する試験を行った。 And the presence or absence of the spark from a test body at the time of a heating and the presence or absence of the abnormality which becomes a fault on use were examined visually. Moreover, about the test body in which abnormality etc. were not seen after 210 second heating time, the test which continues a heating until a crack was discovered was done.
以下の表１では、試験体について、スパーク等の異常がなく、加熱時間２１０秒経過後に異常等が見られなかったものを「○」とし、異常等が見られたものを「×」とした。また、加熱時間２１０秒をクリアした適合品については、クラックが発見されたときの加熱時間を示している。 In Table 1 below, for the test specimens, there was no abnormality such as sparks, and no abnormality was found after 210 seconds of heating time, and “X” was the case where abnormality was seen. . Moreover, about the conformity goods which cleared heating time 210 seconds, the heating time when a crack is discovered is shown.
異常の内容は、未反応メラミン樹脂が縮合反応した際に発生する縮合水により加熱されやすくなり、更に縮合水が気化膨張して樹脂内部から飛び出すことで生じるクラックと、試験体が高温になることで含有するセルロース等が変色するものであった。 The contents of the abnormality are easily heated by the condensed water generated when the unreacted melamine resin undergoes a condensation reaction, and further the cracks caused by the condensation water evaporating and jumping out of the resin, and the specimen being heated to a high temperature. The cellulose and the like contained in the color change.
また、実施例１〜４の各試験体を上記電子レンジの受皿に載置し、高周波出力６００Ｗで６０秒加熱したときの各試験体の底部における中央部の表面温度も別途測定した。 Moreover, each test body of Examples 1-4 was mounted on the saucer of the said microwave oven, and the surface temperature of the center part in the bottom part of each test body when it heated for 60 second with the high frequency output 600W was also measured separately.
表１に示すように、予熱処理のみを施した実施例１及び実施例３において、実施例１における板厚２.６〜３.３ｍｍの試験体、実施例３における板厚２.６〜３.１ｍｍの試験体については、電子レンジに適合する樹脂製食器であることが確認された。 As shown in Table 1, in Example 1 and Example 3 in which only preheating was performed, a specimen having a thickness of 2.6 to 3.3 mm in Example 1 and a thickness of 2.6 to 3 in Example 3 It was confirmed that the test specimen of 0.1 mm was a resin tableware suitable for a microwave oven.
さらに、予熱処理及び再加熱処理を施した実施例２及び実施例４において、それぞれにおける板厚２.６〜４.０ｍｍの試験体については、電子レンジに適合する樹脂製食器であることが確認された。なお、４.０ｍｍを超える板厚については、樹脂製食器としてそのような板厚は必要とされないため確認しなかった。 Furthermore, in Example 2 and Example 4 which performed the pre-heat treatment and the reheating treatment, it was confirmed that the test pieces having a plate thickness of 2.6 to 4.0 mm in each were resin tableware suitable for the microwave oven. It was done. In addition, about the plate | board thickness exceeding 4.0 mm, since such plate | board thickness was not required as resin tableware, it did not confirm.
また、実施例１〜４における前記各試験体における表面温度については、いずれも８０℃を大幅に上回るものはなく、前記各試験体におけるクラック発生までの経過時間についても、いずれも３.５分を大幅に下回るものがないことが確認された。 Moreover, about the surface temperature in each said test body in Examples 1-4, none has exceeded 80 degreeC in all, and also about all the elapsed time until crack generation in each said test body, all are 3.5 minutes. It was confirmed that there was nothing significantly lower than.
実施例１〜４の各試験体における総合評価は、実施例２における板厚２.６〜３.３ｍｍの試験体の表面温度が７４℃以下になることが確認され、これに伴って、クラック発生までの経過時間を長くできることが確認された。 Comprehensive evaluation in each test body of Examples 1 to 4 confirms that the surface temperature of the test body having a plate thickness of 2.6 to 3.3 mm in Example 2 is 74 ° C. or less. It was confirmed that the elapsed time until the occurrence can be lengthened.
以上、説明した本発明の樹脂製食器の製造方法では、メラミン樹脂成形材料に予熱処理を施すとともに、圧縮成形後の成形品に対して再加熱処理を施すことによって、成形品中に残留する未反応のメラミン樹脂の含有量を減少させ、電子レンジの加熱時における縮合水に起因するクラックの発生、変色を防止することができる。 As described above, in the method for producing the resin tableware of the present invention, the melamine resin molding material is preheated, and the molded product after compression molding is subjected to reheating treatment, thereby remaining unmolded in the molded product. The content of the melamine resin in the reaction can be reduced, and the occurrence of cracks and discoloration due to condensed water during heating of the microwave oven can be prevented.
Claims (5)
前記メラミン樹脂成形材料を食器形状へ圧縮成形して成形品とする成形工程と、
を含むことを特徴とする樹脂製食器の製造方法。 Applying a pre-heat treatment to a melamine resin having a dielectric constant of 1 to 7.6 at 1 MHz or a melamine resin molding material containing an additive;
A molding step of compressing and molding the melamine resin molding material into a tableware shape,
The manufacturing method of the resin tableware characterized by including.
前記メラミン樹脂成形材料を食器形状へ圧縮成形して成形品とする成形工程と、
前記成形品に再加熱処理を施す熱処理工程と、
を含むことを特徴とする樹脂製食器の製造方法。 Applying a pre-heat treatment to a melamine resin having a dielectric constant of 1 to 7.6 at 1 MHz or a melamine resin molding material containing an additive;
A molding step of compressing and molding the melamine resin molding material into a tableware shape,
A heat treatment step for reheating the molded article;
The manufacturing method of the resin tableware characterized by including.
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| JP2006161023A (en) * | 2004-07-09 | 2006-06-22 | Nippon Carbide Ind Co Inc | Composition for molding melamine-based resin and molded article |
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| JP5801510B1 (en) * | 2015-06-17 | 2015-10-28 | ヤマト化工株式会社 | Melamine resin tableware |
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| JPS4820103Y1 (en) * | 1970-03-05 | 1973-06-09 | ||
| JPH1156565A (en) * | 1997-08-26 | 1999-03-02 | Noritake Co Ltd | Weather resistant tableware |
| JP2000093278A (en) * | 1998-09-17 | 2000-04-04 | Kawabata Shoten:Kk | Tableware and manufacture thereof |
| JPWO2002031537A1 (en) * | 2000-10-12 | 2004-02-19 | 株式会社コス | Calibration method of relative permittivity of electromagnetic wave probe and electromagnetic wave probe |
| JP2006161023A (en) * | 2004-07-09 | 2006-06-22 | Nippon Carbide Ind Co Inc | Composition for molding melamine-based resin and molded article |
| JP2008307379A (en) * | 2007-05-17 | 2008-12-25 | Yamato Kako Co Ltd | Melamine-based resin dish |
| CN204445129U (en) * | 2015-02-05 | 2015-07-08 | 深圳市亿祥珠宝有限公司 | A kind of composite bowl |
| JP5801510B1 (en) * | 2015-06-17 | 2015-10-28 | ヤマト化工株式会社 | Melamine resin tableware |
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