JP2020079531A - Synthetic resin window frame - Google Patents
Synthetic resin window frame Download PDFInfo
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- JP2020079531A JP2020079531A JP2018213436A JP2018213436A JP2020079531A JP 2020079531 A JP2020079531 A JP 2020079531A JP 2018213436 A JP2018213436 A JP 2018213436A JP 2018213436 A JP2018213436 A JP 2018213436A JP 2020079531 A JP2020079531 A JP 2020079531A
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- vinyl chloride
- window frame
- chloride resin
- synthetic resin
- chemically modified
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- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 25
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 25
- 229920005989 resin Polymers 0.000 claims abstract description 54
- 239000011347 resin Substances 0.000 claims abstract description 54
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000000203 mixture Substances 0.000 claims abstract description 39
- 239000001913 cellulose Substances 0.000 claims abstract description 23
- 229920002678 cellulose Polymers 0.000 claims abstract description 23
- 239000002121 nanofiber Substances 0.000 claims abstract description 22
- 229920000178 Acrylic resin Polymers 0.000 claims description 10
- 239000004925 Acrylic resin Substances 0.000 claims description 10
- 125000001501 propionyl group Chemical group O=C([*])C([H])([H])C([H])([H])[H] 0.000 claims description 6
- 125000005590 trimellitic acid group Chemical group 0.000 claims description 4
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid group Chemical group C(C=1C(C(=O)O)=CC=CC1)(=O)O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000005452 bending Methods 0.000 description 14
- 229920000193 polymethacrylate Polymers 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 229920000058 polyacrylate Polymers 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000007385 chemical modification Methods 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
- 239000000326 ultraviolet stabilizing agent Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 1
- 229920002319 Poly(methyl acrylate) Polymers 0.000 description 1
- 229920002125 Sokalan® Polymers 0.000 description 1
- 229920002433 Vinyl chloride-vinyl acetate copolymer Polymers 0.000 description 1
- 229920000800 acrylic rubber Polymers 0.000 description 1
- KRGNPJFAKZHQPS-UHFFFAOYSA-N chloroethene;ethene Chemical group C=C.ClC=C KRGNPJFAKZHQPS-UHFFFAOYSA-N 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012760 heat stabilizer Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 125000000959 isobutyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])* 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000006224 matting agent Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 125000004123 n-propyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 125000005498 phthalate group Chemical group 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229920000120 polyethyl acrylate Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Wing Frames And Configurations (AREA)
Abstract
Description
本発明は、合成樹脂製中空窓枠、更に詳しくは温度変化に対する変形が可及的に回避されると共に耐熱性及び強度が向上された合成樹脂製中空窓枠に関する。 The present invention relates to a synthetic resin hollow window frame, and more particularly to a synthetic resin hollow window frame in which deformation due to temperature change is avoided as much as possible and heat resistance and strength are improved.
下記特許文献１には、内層がリサイクル塩化ビニル系樹脂とリサイクルオレフィン系樹脂又はリサイクルアクリル系樹脂とを含む組成物から形成され、外層が未使用塩化ビニル樹脂又は未使用アクリル樹脂を主成分とする組成物から形成された合成樹脂製中空窓枠が開示されている。かような窓枠は、内層を形成する材料としてリサイクル樹脂を使用しているので製作コストが低減されるにも拘わらず、外層を形成する材料として未使用塩化ビニル樹脂或いは未使用アクリル樹脂を使用している故に、充分な耐候性を有すると共に所望色の充分に美麗な外観を呈する。 In Patent Document 1 below, the inner layer is formed from a composition containing a recycled vinyl chloride resin and a recycled olefin resin or a recycled acrylic resin, and the outer layer contains an unused vinyl chloride resin or an unused acrylic resin as a main component. A synthetic resin hollow window frame formed from the composition is disclosed. Such a window frame uses recycled resin as a material for forming the inner layer, so that although the manufacturing cost is reduced, unused vinyl chloride resin or unused acrylic resin is used as a material for forming the outer layer. Therefore, it has sufficient weather resistance and exhibits a sufficiently beautiful appearance of a desired color.
而して、上記特許文献１に開示されている窓枠も未だ充分に満足し得るものではなく、過激な温度変化に起因して歪み等の望ましくない変形が発生する虞がある、耐熱性が必ずしも充分でない、強度が必ずしも充分ではなく偶発的に過大な力が作用した場合に破損されてしまう虞がある、という解決すべき問題を有する。 Thus, the window frame disclosed in Patent Document 1 is not yet sufficiently satisfactory, and there is a risk that undesired deformation such as distortion may occur due to a drastic temperature change. There is a problem to be solved that the strength is not always sufficient, and the strength is not always sufficient, and there is a risk of being damaged when an excessive force is accidentally applied.
本発明は上記事実に鑑みてなされたものであり、その主たる技術的課題は、製作コストを過剰に増大せしめることなく、過激な温度変化に晒されても変形が可及的に回避され、耐熱性が格段に向上され、充分な強度を有する、新規且つ改良された合成樹脂製中空窓枠を提供することである。 The present invention has been made in view of the above facts, and its main technical problem is that deformation is avoided as much as possible even when exposed to extreme temperature changes without excessively increasing manufacturing costs, and heat resistance is high. It is an object of the present invention to provide a new and improved synthetic resin hollow window frame having significantly improved properties and having sufficient strength.
本発明者等は鋭意研究及び実験の結果、少なくとも一部を塩化ビニル系樹脂と共に化学修飾されたセルロースナノファイバーを主成分とする組成物から形成することによって、上記主たる技術的課題を達成することができることを見出した。 As a result of earnest research and experiments, the present inventors have achieved the above-mentioned main technical problems by forming at least a part of a composition containing cellulose nanofibers chemically modified with a vinyl chloride resin as a main component. I found that I can do it.
即ち、本発明によれば、上記主たる技術的課題を達成することができる合成樹脂製中空窓枠として、
少なくとも一部は塩化ビニル系樹脂及び化学修飾セルロースナノファイバーを主成分とする組成物から形成されている、ことを特徴とする合成樹脂製中空窓枠が提供される。
That is, according to the present invention, as a synthetic resin hollow window frame that can achieve the main technical problems,
Provided is a hollow window frame made of synthetic resin, characterized in that at least a part of the hollow window frame is made of a composition containing vinyl chloride resin and chemically modified cellulose nanofibers as main components.
好適には、少なくとも一部は重量割合で８５乃至９５％の塩化ビニル系樹脂及び重量割合で５乃至１５％の化学修飾セルロースナノファイバーを含む組成物から形成されている。化学修飾セルロースナノファイバーはプロピオニル基、フタル酸基又はトリメリット酸基によって化学修飾されているのが好都合である。特に好ましくは、内層はリサイクル塩化ビニル系樹脂及び化学修飾セルロースナノファイバーを主成分とする組成物から形成され、外層の少なくとも一部は未使用塩化ビニル系樹脂を主成分とする組成物から形成されている。該外層の屋外に露呈する部分及び屋内に露呈する部分は未使用塩化ビニル系樹脂又は未使用アクリル系樹脂を主成分とする組成物から形成されているのが好適であり、殊に該外層の屋外に露呈する部分は未使用アクリル系樹脂を主成分とする組成物から形成されており、該外層の屋外に露呈する部分以外は未使用塩化ビニル系樹脂を主成分とする組成物から形成されているのが好適である。該外層の未使用塩化ビニル系樹脂を主成分とする組成物から形成された部分の厚さは０．５乃至３．５ｍｍであり、該外層の未使用アクリル系樹脂を主成分とする組成物から形成された部分の厚さは０．１乃至０．３ｍｍであり、該内層の厚さは０．５乃至３．５ｍｍであるのが好都合である。 Preferably, at least a portion is formed from a composition comprising 85 to 95% by weight vinyl chloride resin and 5 to 15% by weight chemically modified cellulose nanofibers. Advantageously, the chemically modified cellulose nanofibers are chemically modified with propionyl groups, phthalic acid groups or trimellitic acid groups. Particularly preferably, the inner layer is formed from a composition based on recycled vinyl chloride resin and chemically modified cellulose nanofibers, and at least a part of the outer layer is formed from a composition based on virgin vinyl chloride resin. ing. The portion of the outer layer exposed to the outdoors and the portion of the outer layer exposed to the indoor are preferably formed from a composition containing a unused vinyl chloride resin or an unused acrylic resin as a main component. The portion exposed to the outside is formed from a composition containing an unused acrylic resin as a main component, and the portion other than the portion exposed to the outside of the outer layer is formed from a composition containing an unused vinyl chloride resin as a main component. Is preferred. The thickness of the portion of the outer layer formed from the composition containing the unused vinyl chloride resin as the main component is 0.5 to 3.5 mm, and the composition containing the unused acrylic resin as the main component of the outer layer Conveniently, the thickness of the portion formed from is 0.1 to 0.3 mm and the thickness of the inner layer is 0.5 to 3.5 mm.
本願の特許請求の範囲及び明細書において使用する語句「リサイクル塩化ビニル系樹脂」は、実際に窓枠等に使用され廃材として回収された塩化ビニル系樹脂のみならず、押出成形された窓枠材を適宜に切断し加熱溶着して窓枠を製作する際に残材として生成された塩化ビニル系樹脂も含む。 The phrase "recycled vinyl chloride resin" used in the claims and the description of the present application is not only a vinyl chloride resin actually used for window frames and recovered as waste material, but also an extruded window frame material. A vinyl chloride resin produced as a residual material when a window frame is manufactured by appropriately cutting and heat welding.
後に言及する実験例から明確に理解される如く、未使用又はリサイクル塩化ビニル系樹脂から成形した成形体と比べて、未使用又はリサイクル塩化ビニル系樹脂及び化学修飾セルロースナノファイバーを主成分とする組成物から成形した成形体は、線膨張率が低く、耐熱性に優れ、曲げ最大応力及び曲げ弾性率が高く、かくして本発明の合成樹脂製中空窓枠は、製作コストを過剰に増大せしめることがないにも拘わらず、過激な温度変化に晒されても変形が可及的に回避され、耐熱性が格段に向上され、充分な強度を有する。 As will be clearly understood from the experimental examples to be mentioned later, a composition mainly composed of an unused or recycled vinyl chloride resin and a chemically modified cellulose nanofiber, as compared with a molded body molded from an unused or recycled vinyl chloride resin. The molded product molded from the product has a low linear expansion coefficient, excellent heat resistance, high bending maximum stress and bending elastic modulus, and thus the synthetic resin hollow window frame of the present invention can increase the manufacturing cost excessively. Even if it is not present, deformation is avoided as much as possible even when exposed to extreme temperature changes, heat resistance is markedly improved, and sufficient strength is provided.
以下、本発明に従って構成された合成樹脂製中空窓枠の好適実施形態に使用されている枠部材を示している添付図面を参照して更に詳述する。 Hereinafter, a detailed description will be given with reference to the accompanying drawings showing a frame member used in a preferred embodiment of a synthetic resin hollow window frame configured according to the present invention.
当業者には周知の如く、全体として矩形状である合成樹脂製中空窓枠は、押出成形（後に更に言及するとおり、本発明に従って構成された合成樹脂製中空窓枠においては内層と外層とが異なった材料から成形されている故に共押出成形）した中空枠部材を適宜に切断して、上枠部材、下枠部材及び両側枠部材を形成し、上枠部材の両端に両側枠部材の上端を溶着すると共に下枠部材の両端に両側枠部材の下端を溶着することによって製造される。本発明に従って構成された合成樹脂中空窓枠の好適実施形態は、図１に図示するとおりの断面形状を有する枠部材２を使用して構成される。図１に図示する枠部材の形状自体は周知の典型例であり、本発明に従って構成された窓枠の新規な特徴を構成するものではなく、それ故に枠部材の形状自体については本明細書においては説明を省略する。 As is well known to those skilled in the art, a synthetic resin hollow window frame having a generally rectangular shape is formed by extrusion molding (as will be further referred to later, in a synthetic resin hollow window frame constructed according to the present invention, an inner layer and an outer layer are Hollow frame members that have been co-extruded since they are molded from different materials are cut as appropriate to form the upper frame member, the lower frame member, and the side frame members, and the upper ends of the side frame members at both ends of the upper frame member. And the lower ends of both side frame members are welded to both ends of the lower frame member. A preferred embodiment of a synthetic resin hollow window frame constructed according to the present invention is constructed using a frame member 2 having a cross-sectional shape as shown in FIG. The shape itself of the frame member shown in FIG. 1 is a well-known typical example, and does not constitute a novel feature of a window frame constructed according to the present invention, and therefore the shape itself of the frame member is herein referred to. Is omitted.
本発明に従って構成された窓枠においては、少なくとも一部が塩化ビニル系樹脂及び化学修飾セルロースナノファイバーを主成分とする組成物から成形されていることが重要である。図示の実施形態においては、窓枠の製造に使用される枠部材２の内層４は、リサイクル塩化ビニル系樹脂及び化学修飾セルロースナノファイバーを主成分とする組成物から成形されている。かかる組成物は、重量割合で８５乃至９５％のリサイクル塩化ビニル系樹脂及び重量割合で５乃至１５％の化学修飾セルロースナノファイバーを含有しているのが好適である。リサイクル塩化ビニル系樹脂に代えて未使用塩化ビニル系樹脂を使用することもできあるが、リサイクル塩化ビニル系樹脂を使用することによって製造コストを低減することができる。一方、リサイクル塩化ビニル系樹脂は種々の色に着色されており、それ故にリサイクル塩化ビニル系樹脂を使用すると、美しい所望色にすることが困難であるが、内層４は目視されることがなく、美しい所望色でないことによって問題が発生することは皆無である。未使用又はリサイクル塩化ビニル系樹脂を主成分とする組成物によって成形された枠部材に比べて、未使用又はリサイクル塩化ビニル系樹脂及び化学修飾セルロースナノファイバーを主成分とする組成物から成形した枠部材２は、後述する実験例からも明確に理解されるとおり、線膨張率が低く、耐熱性に優れ、曲げ最大応力及び曲げ弾性率が高い。それ故に、本発明に従って構成された窓枠は、製作コストを過剰に増大せしめることがないにも拘わらず、過激な温度変化に晒されても変形が可及的に回避され、耐熱性が格段に向上され、充分な強度を有する In the window frame constructed according to the present invention, it is important that at least a part of the window frame is molded from a composition containing vinyl chloride resin and chemically modified cellulose nanofibers as main components. In the illustrated embodiment, the inner layer 4 of the frame member 2 used for manufacturing the window frame is formed from a composition containing recycled vinyl chloride resin and chemically modified cellulose nanofibers as main components. Such a composition preferably contains 85 to 95% by weight of recycled vinyl chloride resin and 5 to 15% by weight of chemically modified cellulose nanofibers. Although it is possible to use an unused vinyl chloride resin in place of the recycled vinyl chloride resin, the production cost can be reduced by using the recycled vinyl chloride resin. On the other hand, the recycled vinyl chloride resin is colored in various colors. Therefore, when the recycled vinyl chloride resin is used, it is difficult to obtain a beautiful desired color, but the inner layer 4 is not visually observed. No problem is caused by the fact that the desired color is not beautiful. A frame formed from a composition containing unused or recycled vinyl chloride resin and a chemically modified cellulose nanofiber as a main component, as compared with a frame member formed from a composition containing unused or recycled vinyl chloride resin as a main component. The member 2 has a low coefficient of linear expansion, excellent heat resistance, and a high bending maximum stress and a high bending elastic modulus, as will be clearly understood from the experimental examples described later. Therefore, the window frame constructed according to the present invention does not excessively increase the manufacturing cost, but even if it is exposed to a drastic temperature change, the deformation is avoided as much as possible and the heat resistance is remarkably high. And has sufficient strength
未使用又はリサイクル塩化ビニル系樹脂としては、塩化ビニルの単独重合体；塩化ビニル−エチレン共重合体、塩化ビニル−酢酸ビニル共重合体の如き塩化ビニルを主体とした共重合体；及びアクリル系ゴム変性塩化ビニル樹脂の如きゴム変性塩化ビニル樹脂を例示することができる。これらの樹脂は単独で或いは複数種を混合して使用されたものでよい。また、必要に応じて熱安定剤、滑剤、紫外線安定剤、安定化助剤、着色剤（顔料）及び充填剤等の添加剤が配合されたものでもよい。 Unused or recycled vinyl chloride resins include vinyl chloride homopolymers; vinyl chloride-based copolymers such as vinyl chloride-ethylene copolymers and vinyl chloride-vinyl acetate copolymers; and acrylic rubbers. A rubber-modified vinyl chloride resin such as a modified vinyl chloride resin can be exemplified. These resins may be used alone or as a mixture of plural kinds. In addition, additives such as a heat stabilizer, a lubricant, an ultraviolet stabilizer, a stabilizing aid, a colorant (pigment) and a filler may be blended if necessary.
化学修飾セルロースナノファイバーは、塩化ビニル系樹脂との相性の点から、炭素鎖が長いため塩化ビニル樹脂との相溶性向上が期待できるプロピオニル基、可塑剤と同様の化学構造を持つフタル酸基又はトリメリット酸基によって化学修飾されたものが好ましい。 Chemically modified cellulose nanofibers have a long carbon chain from the viewpoint of compatibility with vinyl chloride resins, and therefore can be expected to have improved compatibility with vinyl chloride resins, such as propionyl groups, phthalate groups having the same chemical structure as plasticizers, or Those chemically modified with a trimellitic acid group are preferable.
窓枠の製造に使用される枠部材２の外層６ａ及び６ｂの少なくとも一部は未使用塩化ビニル系樹脂を主成分とする組成物から成形されているのが好適である。図示の実施形態においては、外層６ａ及び６ｂにおける、屋外に露呈される（即ち大気に晒され且つ屋外において目視される）故に耐候性に優れ且つ美麗な外観を呈することが望まれる部分６ａは未使用アクリル系樹脂を主成分とする組成物から成形され、かかる部分６ａ以外の部分６ｂは未使用塩化ビニル系樹脂を主成分とする組成物から成形されている。所望ならば、外層６ａも未使用塩化ビニル系樹脂を主成分とする組成物から成形することもできる。また、外層６ｂにおける、屋外に露呈されない（即ち屋外において大気に晒されることがない）と共に屋内にも露呈されない（即ち屋内において目視されない）部分は、内層４と一体に未使用又はリサイクル塩化ビニル系樹脂及び化学修飾セルロースナノファイバーを主成分とする組成物から成形することもできる。 At least a part of the outer layers 6a and 6b of the frame member 2 used for manufacturing the window frame is preferably molded from a composition containing an unused vinyl chloride resin as a main component. In the illustrated embodiment, the portions 6a of the outer layers 6a and 6b, which are exposed to the outside (that is, exposed to the atmosphere and visually observed in the outside) and therefore are required to have a good weather resistance and a beautiful appearance, are not formed. The portion 6b other than the portion 6a is formed from a composition containing an unused vinyl chloride resin as a main component. If desired, the outer layer 6a can also be molded from a composition based on virgin vinyl chloride resin. In addition, a portion of the outer layer 6b that is not exposed to the outdoors (that is, is not exposed to the atmosphere outdoors) and is not exposed to the indoor (that is, is not visually observed indoors) is an unused or recycled vinyl chloride system integrally with the inner layer 4. It can also be molded from a composition based on a resin and chemically modified cellulose nanofibers.
未使用のアクリル樹脂系樹脂としては、ポリアクリル酸メチル、ポリアクリル酸エチル、ポリアクリル酸ｎ−ブチル、ポリアクリル酸イソプロピル、ポリアクリル酸ｓｅｃ−ブチル、ポリアクリル酸ｔ−ブチル、ポリアクリル酸オクチル、ポリアクリル酸エチルヘキシンの如きポリアクリル酸エステル類；ポリメタアクリル酸メチル（ＰＭＭＡ）、ポリメタアクリル酸エチル、ポリメタアクリル酸ｎ−プロピル、ポリメタアクリル酸イソブチル、ポリメタアクリル酸ｓｅｃ−ブチル、ポリメタアクリル酸ｔ−ブチル、ポリメタアクリル酸オクチル、ポリメタアクリル酸エチルヘキシンの如きポリメタアクリル酸エステル類を例示することができる。これらの樹脂は単独で或いは複数種を混合して使用されたものでよい。また、必要に応じて滑剤、紫外線安定剤、着色剤（顔料）及びつや消し剤等の添加剤が配合されたものでもよい。 Unused acrylic resin-based resins include polymethyl acrylate, polyethyl acrylate, n-butyl polyacrylate, isopropyl polyacrylate, sec-butyl polyacrylate, t-butyl polyacrylate, octyl polyacrylate. , Polyacrylic acid esters such as ethyl acrylate polymethacrylate; methyl polymethacrylate (PMMA), ethyl polymethacrylate, n-propyl polymethacrylate, isobutyl polymethacrylate, sec-butyl polymethacrylate, Examples thereof include polymethacrylic acid esters such as t-butyl polymethacrylate, octyl polymethacrylate, and ethylhexine polymethacrylate. These resins may be used alone or as a mixture of plural kinds. Further, additives such as a lubricant, an ultraviolet stabilizer, a colorant (pigment) and a matting agent may be blended if necessary.
上述したとおりの内層４並びに外層４ａ及び４ｂを備えた枠部材２は、それ自身は周知の共押出によって好都合に成形することができる。一般に、内層４の厚さは０．５乃至３．５ｍｍであり、外層４ａの厚さは０．１乃至０．３ｍｍであり、外層６ｂの厚さは０．５乃至３．５ｍｍであるのが好適である。 The frame member 2 provided with the inner layer 4 and the outer layers 4a and 4b as described above can be conveniently formed by coextrusion, which is well known per se. Generally, the inner layer 4 has a thickness of 0.5 to 3.5 mm, the outer layer 4a has a thickness of 0.1 to 0.3 mm, and the outer layer 6b has a thickness of 0.5 to 3.5 mm. Is preferred.
実験例１−Ａ及び１−Ｂ
リサイクル塩化ビニル系樹脂として、株式会社エクセルシャノンから商品名「シャノンウインド」として販売されている合成樹脂製中空窓枠を製造する際に残材として生成されたリサイクル塩化ビニル系樹脂（重合度１０００）をターボミルで粉砕して平均粒子径３ｍｍ、嵩密度０．７ｇ／ｃｃにした粉末を使用し、化学修飾セルロースナノファイバーとして、市販のパルプ由来のセルロースをプロピオニル基で化学修飾（変性）したものを使用した。化学修飾度（変性度）は表１に記載のとおりである。重量割合で９０％のリサイクル塩化ビニル系樹脂粉末と重量割合で１０％の化学修飾セルロースナノファイバーから構成された組成物を混合及び加熱混練後造粒した原料を使用して、平板を成形した。そして、かかる平板の曲げ最大応力（ＭＰａ）、曲げ弾性率（ＧＰａ）、線膨張率、Ａ５０法によるビカット軟化温度（℃）を測定した。その結果は表１に示すとおりであった。
Experimental Examples 1-A and 1-B
Recycled vinyl chloride resin produced as a residual material when manufacturing hollow window frames made of synthetic resin sold under the trade name "Shannon Wind" from Excel Shannon Co., Ltd. (degree of polymerization 1000). Was pulverized with a turbo mill to a powder having an average particle diameter of 3 mm and a bulk density of 0.7 g/cc, and chemically modified cellulose nanofibers obtained by chemically modifying (modified) commercially available pulp-derived cellulose with a propionyl group were used. used. The degree of chemical modification (degree of modification) is as shown in Table 1. A flat plate was molded using a raw material obtained by mixing and heating and kneading a composition composed of 90% by weight of recycled vinyl chloride resin powder and 10% by weight of chemically modified cellulose nanofibers, and kneading. Then, the bending maximum stress (MPa), the bending elastic modulus (GPa), the coefficient of linear expansion, and the Vicat softening temperature (° C.) by the A50 method of the flat plate were measured. The results are shown in Table 1.
実験例２
プロピオニル基ではなくてフタル酸基で化学修飾した（化学修飾度は表１に記載のとおりであった）点を除き実験例１−Ａ及び１−Ｂと同様にして成形した成形品の曲げ最大応力（ＭＰａ）曲げ弾性率（ＧＰａ）、線膨張率、Ａ５０法によるビカット軟化温度（℃）を測定した。その結果は表１に示すとおりであった。
Experimental example 2
Bending maximum of a molded article molded in the same manner as in Experimental Examples 1-A and 1-B except that it was chemically modified with a phthalic acid group instead of a propionyl group (the chemical modification degree was as shown in Table 1). The stress (MPa) bending elastic modulus (GPa), linear expansion coefficient, and Vicat softening temperature (° C.) by the A50 method were measured. The results are shown in Table 1.
プロピオニル基ではなくてトリメリット酸基で化学修飾した（化学修飾度は表１に記載のとおりであった）点を除き実験例１−Ａ及び１−Ｂと同様にして成形した成形品の曲げ最大応力（ＭＰａ）曲げ弾性率（ＧＰａ）、線膨張率、Ａ５０法によるビカット軟化温度（℃）を測定した。その結果は表１に示すとおりであった。 Bending of a molded article molded in the same manner as in Experimental Examples 1-A and 1-B except that it was chemically modified with a trimellitic acid group instead of a propionyl group (the chemical modification degree was as shown in Table 1). The maximum stress (MPa) bending elastic modulus (GPa), linear expansion coefficient, and Vicat softening temperature (° C.) by the A50 method were measured. The results are shown in Table 1.
比較実験例１
化学修飾セルロースナノファイバーを使用することなくリサイクル塩化ビニル系樹脂のみを使用して成形した点を除き実験例１−Ａ、１−Ｂ及び１−Ｃと同様にして成形した成形品の曲げ最大応力（ＭＰａ）曲げ弾性率（ＧＰａ）、線膨張率、Ａ５０法によるビカット軟化温度（℃）を測定した。その結果は表１に示すとおりであった。
Comparative Experimental Example 1
Maximum bending stress of a molded product molded in the same manner as in Experimental Examples 1-A, 1-B and 1-C, except that it was molded using only recycled vinyl chloride resin without using chemically modified cellulose nanofibers. (MPa) Bending elastic modulus (GPa), linear expansion coefficient, and Vicat softening temperature (°C) by A50 method were measured. The results are shown in Table 1.
表１における測定結果から、リサイクル塩化ビニル系樹脂を主成分とする組成物によって成形された枠部材に比べて、リサイクル塩化ビニル系樹脂及び化学修飾セルロースナノファイバーを主成分とする組成物から成形した枠部材は、線膨張率が低く、耐熱性に優れ、曲げ最大応力及び曲げ弾性率が同等以上になることが理解される。 From the measurement results in Table 1, as compared with the frame member molded by the composition containing recycled vinyl chloride resin as the main component, the molded product was formed from the composition containing recycled vinyl chloride resin and the chemically modified cellulose nanofiber as the main component. It is understood that the frame member has a low linear expansion coefficient, excellent heat resistance, and a bending maximum stress and a bending elastic modulus that are equal to or higher than each other.
２：枠部材
４：枠部材の内層
６ａ：枠部材の外層
６ｂ：枠部材の外層
2: Frame member 4: Inner layer of frame member 6a: Outer layer of frame member 6b: Outer layer of frame member
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