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WO2018173887A1 - Corps moulé et procédé de production de corps moulé - Google Patents

Corps moulé et procédé de production de corps moulé Download PDF

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Publication number
WO2018173887A1
WO2018173887A1 PCT/JP2018/009988 JP2018009988W WO2018173887A1 WO 2018173887 A1 WO2018173887 A1 WO 2018173887A1 JP 2018009988 W JP2018009988 W JP 2018009988W WO 2018173887 A1 WO2018173887 A1 WO 2018173887A1
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polypeptide
amino acid
acid sequence
protein
molded body
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PCT/JP2018/009988
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English (en)
Japanese (ja)
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アビジット ラビキラン ムレイ
潤一 菅原
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Ｓｐｉｂｅｒ株式会社
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Publication of WO2018173887A1 publication Critical patent/WO2018173887A1/fr

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  • the present invention relates to a molded article and a method for producing the molded article.
  • an object of the present invention is to provide a molded article having stable physical properties against environmental temperature changes and a method for producing the same.
  • the present invention relates to a molded article of a composition containing a polypeptide, which is measured after being alternately exposed to a temperature environment above 0 ° C. and a temperature environment below 0 ° C. within a temperature range of ⁇ 100 to 120 ° C.
  • a molded product having a bending strength at room temperature of ⁇ 20% or less of the bending strength at room temperature measured before exposure.
  • the molded body was measured for the Young's modulus at room temperature measured after being alternately exposed to a temperature environment above 0 ° C. and a temperature environment below 0 ° C. within a temperature range of ⁇ 100 to 120 ° C. before the exposure. It may be a molded product having a value of ⁇ 15% or less of the Young's modulus at room temperature.
  • the molded body preferably has transparency. If the said molded object has transparency, it can apply, for example to a window use without a problem.
  • the molded body preferably has a flexural modulus exceeding 4.5 GPa. Moreover, since the said molded object exhibits the high bending elastic modulus exceeding 4.5 GPa, when it shape
  • the flexural modulus is preferably 5.0 GPa or more, more preferably 5.2 GPa or more. Although there is no restriction
  • the polypeptide preferably contains at least one selected from the group consisting of natural spider silk proteins and polypeptides derived from natural spider silk proteins (artificial polypeptides). Natural spider silk proteins and polypeptides derived from natural spider silk proteins are both excellent in flexural modulus and flexural strength, and can be further reduced in weight and functionality when incorporated as polypeptides. .
  • the polypeptide is preferably produced by a genetically modified microorganism.
  • Polypeptides produced by genetically modified microorganisms can be obtained at a lower price than naturally derived polypeptides and can be supplied with a stable quality.
  • the polypeptide may further contain silk fibroin, soy protein, casein, keratin, collagen, and whey protein.
  • the molded body may be provided as a heat and pressure molded body.
  • the mold molded body means one molded with a mold (mold) and the like, but by performing heating and pressurization, it becomes a molded body having further excellent bending elastic modulus.
  • the molded article can be produced by a method including a step of heating and pressurizing the composition containing the polypeptide.
  • a molded article having stable physical properties against environmental temperature changes and a method for producing the same are provided.
  • FIG. 1 It is a schematic cross section of a pressure molding machine.
  • A is a schematic cross-sectional view of a pressure molding machine before introduction of a composition, (b) immediately after introduction of the composition, and (c) a state in which the composition is heated and pressurized.
  • 2 is a photograph of a molded product of Example 1. It is a graph which shows the change rate of the bending strength of a molded object of Example 25, and Young's modulus.
  • the molded article according to the embodiment is composed of a composition containing a polypeptide.
  • the polypeptide include a natural spider silk protein and / or a polypeptide derived from a natural spider silk protein (hereinafter, these are also combined).
  • the term “spider silk polypeptide” may be used as a generic term).
  • Polypeptides can include polypeptides other than spider silk polypeptides, and such polypeptides include silk fibroin, soy protein, casein, keratin, collagen, and whey protein.
  • the molded body can be obtained by introducing the above composition into a mold (mold) and molding the mold, and can be heated and / or pressurized in the molding process.
  • the composition typically has a powdery form (such as a lyophilized powder) or a fibrous form (such as a fiber obtained by spinning), and the molded article contains a polypeptide having such a form. It can be a fused body of the composition.
  • Examples of the natural spider silk protein used as the polypeptide constituting the molded article include a large spout bookmark thread protein and a weft protein.
  • Large splint bookmark protein is produced by spider large bottle-like wire and has a characteristic of excellent toughness.
  • Examples of the large sputum bookmark thread protein include large bottle-shaped lines spidroin MaSp1 and MaSp2 derived from Nephilavavipes, and ADF3 and ADF4 derived from abalone spider (Araneus diadematus).
  • the weft protein is produced in the flagellate form of the spider, and the weft protein includes, for example, the flagellum silk protein derived from Nephilalavipes.
  • polypeptide derived from a natural spider silk protein examples include a recombinant spider silk protein, for example, a mutant, analog or derivative of a natural spider silk protein.
  • a recombinant spider silk protein that is a large sphincter bookmark thread protein is particularly suitable.
  • silk fibroin, soybean protein, casein, keratin, collagen, and whey protein can be used in combination with the spider silk polypeptide described above.
  • the amount of silk fibroin and the like is, for example, preferably 20 parts by mass or less, more preferably 10 parts by mass or less, and more preferably 5 parts by mass or less with respect to 100 parts by mass of the spider silk polypeptide.
  • the amount of silk fibroin or the like is in the above range, the transparency of the molded product is more excellent.
  • Silk is a fiber obtained from cocoons made by silkworm (Bombyx mori) larvae, and the silk thread is a single fiber in which two fibroin are covered with outer glue (sericin). Fibroin is composed of a large number of fibrils, and the outer side of fibroin is covered with four layers of sericin to form a single string. Practically, the outer sericin is dissolved and removed by refining and used as a silk filament for clothing.
  • the specific gravity of silk is 1.33, the fineness is generally 3.3 decitex, and the fiber length is generally about 1300 to 1500 m.
  • Silk fibroin is made from natural or domestic silkworms or used or discarded silk fabrics. Silk fibroin from which silk fibroin has been removed and other fats have been purified to produce silk fibroin freeze-dried powder ( Sericin-free silk fibroin lyophilized powder) is preferred. In addition, as silk fibroin, even if it does not remove sericin etc. (sericin non-removed silk fibroin), it can be used.
  • the molded body may be a polypeptide-only molded body, but additional components (eg, plasticizer, crystal nucleating agent, antioxidant, colorant, filler, moisture, synthetic resin, etc.) are added to the polypeptide. What was added may be a molded product. When an additive component such as a plasticizer is used, it is preferably 50% by mass or less of the total amount of the polypeptide. Moreover, the foreign material which arises in the process of obtaining polypeptide may be contained.
  • additional components eg, plasticizer, crystal nucleating agent, antioxidant, colorant, filler, moisture, synthetic resin, etc.
  • a preferable molded body is transparent. Transparency can be judged visually, but when the optical transmittance meter is used, for example, when the integration time is 0.1 seconds in the wavelength range of 220 to 800 nm, the transmittance is preferably 50% or more. It is.
  • FIG. 1 is a schematic cross-sectional view of a pressure molding machine that can be used to manufacture a molded body.
  • a pressure molding machine 10 shown in FIG. 1 includes a mold 2 in which a through hole is formed and which can be heated, and an upper pin 4 and a lower pin 6 that can move up and down in the through hole of the mold 2.
  • a composition containing a spider silk polypeptide is introduced into a gap formed by inserting the upper pin 4 or the lower pin 6 into the mold 2, and the upper pin 4 and the mold 2 are heated while the mold 2 is heated.
  • a molded product can be obtained by compressing the composition with the lower pins 6.
  • FIG. 2 shows a process chart for obtaining a molded product.
  • (A) is before introduction of the composition,
  • (b) is immediately after introduction of the composition, and
  • (c) is in a state where the composition is heated and pressurized.
  • It is a schematic cross section of a pressure molding machine.
  • the composition is introduced into the through hole in a state where only the lower pin 6 is inserted into the through hole of the mold 2, and as shown in FIG.
  • the upper pin 4 is inserted into the through-hole and lowered, the heating of the mold 2 is started, and the composition 8a before being heated and pressurized is heated and pressurized in the through-hole.
  • the upper pin 4 is lowered until reaching a predetermined pressure, and heating and pressurization are continued until the composition reaches a predetermined temperature in the state shown in FIG. 8b is obtained. Thereafter, the temperature of the mold 2 is lowered using a cooler (for example, a spot cooler), and when the composition 8b reaches a predetermined temperature, the upper pin 4 or the lower pin 6 is removed from the mold 2 and the contents Is taken out to obtain a molded body.
  • the pressurization may be performed by lowering the upper pin 4 with the lower pin 6 fixed, but both the lowering of the upper pin 4 and the raising of the lower pin 6 may be performed.
  • the heating is preferably performed at 80 to 300 ° C, more preferably 100 to 180 ° C, and still more preferably 100 to 130 ° C.
  • the pressurization is preferably performed at 5 kN or more, more preferably 10 kN or more, and further preferably 20 kN or more.
  • the time for continuing the treatment under the condition is preferably 0 to 100 minutes, more preferably 1 to 50 minutes, and further preferably 5 to 30 minutes.
  • the molded article of the composition containing the polypeptide is preferably prepared using a polypeptide derived from a natural spider silk protein, this production method will be described in detail below.
  • the unit of the amino acid sequence represented by Formula 1: REP1-REP2 (1) is 2 or more, preferably 5 or more, more preferably Is a polypeptide containing 10 or more.
  • the polypeptide derived from the large sputum dragline protein includes a unit of the amino acid sequence represented by Formula 1: REP1-REP2 (1), and the C-terminal sequence is represented by any one of SEQ ID NOs: 1 to 3.
  • the unit of the amino acid sequence represented by Formula 1: REP1-REP2 (1) may be the same or different.
  • the polypeptide derived from the large sputum bookmark thread protein preferably has a molecular weight of 500 kDa or less, more preferably 300 kDa, from the viewpoint of productivity when producing a recombinant protein using a microorganism such as Escherichia coli as a host. Or less, more preferably 200 kDa or less.
  • REP1 means polyalanine.
  • alanine arranged continuously is preferably 2 residues or more, more preferably 3 residues or more, still more preferably 4 residues or more, particularly preferably 5 residues or more. is there.
  • alanine continuously arranged is preferably 20 residues or less, more preferably 16 residues or less, still more preferably 12 residues or less, and particularly preferably 10 residues.
  • REP2 is an amino acid sequence consisting of 10 to 200 amino acids, and the total number of residues of glycine, serine, glutamine and alanine contained in the amino acid sequence is 40% of the total number of amino acid residues. Above, preferably 60% or more, more preferably 70% or more.
  • REP1 corresponds to a crystalline region that forms a crystalline ⁇ -sheet within the fiber
  • REP2 is an amorphous region that is more flexible within the fiber and largely lacks a regular structure.
  • [REP1-REP2] corresponds to a repetitive region (repetitive sequence) composed of a crystal region and an amorphous region, and is a characteristic sequence of a bookmark thread protein.
  • the amino acid sequence shown in SEQ ID NO: 1 is identical to the amino acid sequence consisting of the 50-residue amino acid at the C-terminus of the amino acid sequence of ADF3 (NCBI accession numbers: AAC47010, GI: 1263287), and shown in SEQ ID NO:
  • the amino acid sequence is the same as the amino acid sequence obtained by removing 20 residues from the C-terminus of the amino acid sequence shown in SEQ ID NO: 1, and the amino acid sequence shown in SEQ ID NO: 3 is from the C-terminus of the amino acid sequence shown in SEQ ID NO: 1. It is identical to the amino acid sequence with 29 residues removed.
  • polypeptide containing two or more amino acid sequence units represented by Formula 1: REP1-REP2 (1) for example, a polypeptide consisting of the amino acid sequence represented by SEQ ID NO: 7 can be used.
  • a polypeptide consisting of the amino acid sequence shown in SEQ ID NO: 7 is an amino acid sequence (NCBI) of ADF3 in which an amino acid sequence (SEQ ID NO: 4) consisting of a start codon, a His10 tag and an HRV3C protease (Humanrinovirus 3C protease) recognition site is added to the N-terminus. Accession No .: AAC47010, GI: 1263287), and the translation was mutated so that it ends at the 543rd amino acid residue.
  • one or more amino acids in the amino acid sequence represented by SEQ ID NO: 7 are substituted, deleted, inserted, and A protein having an amino acid sequence added and having a repeating region consisting of a crystalline region and an amorphous region can be used.
  • “one or more” means, for example, 1 to 40, 1 to 35, 1 to 30, 1 to 25, 1 to 20, 1 to 15, 1 to 10, Or it means one or several.
  • “one or several” means 1 to 9, 1 to 8, 1 to 7, 1 to 6, 1 to 5, 1 to 4, 1 to 3, Means 2 or 1.
  • Examples of the polypeptide containing two or more amino acid sequence units represented by Formula 1: REP1-REP2 (1) include an ADF4-derived recombinant protein having the amino acid sequence represented by SEQ ID NO: 8. It is done.
  • the amino acid sequence shown in SEQ ID NO: 8 consists of a partial amino acid sequence of ADF4 obtained from the NCBI database (NCBI accession numbers: AAC47011, GI: 1263289) at the N-terminus with a start codon, His10 tag and HRV3C protease (Humanrhinovirus).
  • 3C protease) amino acid sequence consisting of a recognition site SEQ ID NO: 4
  • polypeptide containing two or more units of the amino acid sequence represented by Formula 1: REP1-REP2 (1) one or more amino acids in the amino acid sequence represented by SEQ ID NO: 8 are substituted, deleted, inserted, and A polypeptide having a repeating region consisting of an amino acid sequence added and / or a crystalline region and an amorphous region may be used.
  • examples of the polypeptide including two or more units of the amino acid sequence represented by Formula 1: REP1-REP2 (1) include a MaSp2-derived recombinant protein having the amino acid sequence represented by SEQ ID NO: 9. It is done.
  • the amino acid sequence shown in SEQ ID NO: 9 consists of a partial sequence of MaSp2 obtained from the NCBI database (NCBI accession number: AAT75313, GI: 50363147) at the N-terminus with a start codon, His10 tag and HRV3C protease (Humanrinovirus 3C). An amino acid sequence consisting of a protease) recognition site is added.
  • polypeptide containing two or more amino acid sequence units represented by Formula 1: REP1-REP2 (1) one or more amino acids in the amino acid sequence represented by SEQ ID NO: 9 are substituted, deleted, inserted, and A polypeptide having a repeating region consisting of an amino acid sequence added and / or a crystalline region and an amorphous region may be used.
  • polypeptide derived from the weft protein examples include a polypeptide containing 10 or more, preferably 20 or more, more preferably 30 or more amino acid sequence units represented by Formula 2: REP3 (2).
  • the polypeptide derived from the weft protein preferably has a molecular weight of 500 kDa or less, more preferably 300 kDa or less, and even more preferably, when producing recombinant protein using a microorganism such as Escherichia coli as a host. Is 200 kDa or less.
  • REP3 means an amino acid sequence composed of Gly-Pro-Gly-Gly-X
  • X means one amino acid selected from the group consisting of Ala, Ser, Tyr and Val.
  • a great feature of spider silk is that the weft does not have a crystal region but has a repeating region consisting of an amorphous region. It is presumed that the large splint bookmark yarn has both high stress and stretchability because it has a repetitive region consisting of a crystal region and an amorphous region. On the other hand, the weft yarn is inferior in stress to the large splint guide yarn, but has high stretchability. This is considered to be because most of the weft is composed of amorphous regions.
  • Examples of the polypeptide containing 10 or more units of the amino acid sequence represented by REP3 (2) include a recombinant protein derived from flagellar silk protein having the amino acid sequence represented by SEQ ID NO: 10.
  • the amino acid sequence shown in SEQ ID NO: 10 consists of 1220 residues from the N-terminal corresponding to the repeat part and motif of the partial sequence of flagellar silk protein of American spider spider (NCBI accession numbers: AAF36090, GI: 7106224) obtained from the NCBI database.
  • PR1 sequence The amino acid sequence from the first to the 1659th residue (referred to as PR1 sequence) and the C-terminal of the partial sequence of the American flagella silk protein obtained from the NCBI database (NCBI accession number: AAC38847, GI: 2833649)
  • SEQ ID NO: 4 an amino acid sequence consisting of a start codon, His10 tag and HRV3C protease recognition site was added to the N-terminus of the combined sequence. It is an amino acid sequence.
  • polypeptide containing 10 or more units of the amino acid sequence represented by Formula 2: REP3 (2) one or more amino acids in the amino acid sequence represented by SEQ ID NO: 10 are substituted, deleted, inserted and / or A polypeptide having a repeating region consisting of an added amino acid sequence and consisting of an amorphous region may be used.
  • the polypeptide can be produced using a host transformed with an expression vector containing a gene encoding the polypeptide.
  • the method for producing the gene is not particularly limited, and a gene encoding a natural spider silk protein is amplified and cloned from a spider-derived cell by polymerase chain reaction (PCR) or the like, or chemically synthesized.
  • the chemical synthesis method of the gene is not particularly limited. For example, based on the amino acid sequence information of the natural spider silk protein obtained from the NCBI web database or the like, AKTA oligopilot plus 10/100 (GE Healthcare Japan, Inc.) Etc.) can be synthesized by ligating the oligonucleotides synthesized automatically by PCR or the like.
  • a gene encoding a protein consisting of an amino acid sequence in which an amino acid sequence consisting of a start codon and a His10 tag is added to the N terminus of the above amino acid sequence may be synthesized.
  • a plasmid, phage, virus or the like capable of expressing a protein from a DNA sequence
  • the plasmid type expression vector is not particularly limited as long as it can express the target gene in the host cell and can amplify itself.
  • Escherichia coli Rosetta (DE3) is used as a host
  • a pET22b (+) plasmid vector, a pCold plasmid vector, or the like can be used.
  • the host for example, animal cells, plant cells, microorganisms and the like can be used.
  • the polypeptide used in the present invention is preferably a polypeptide derived from ADF3, which is one of the two main dragged silk proteins of Araneus diadematus.
  • ADF3 polypeptide derived from ADF3
  • An advantage of this polypeptide is that it has basically high elongation and toughness and is easy to synthesize.
  • the molded product is alternately exposed to a temperature environment of ⁇ 100 ° C. or more and 0 ° C. or less and a temperature environment of more than 0 ° C. and 120 ° C. or less for a predetermined time.
  • the bending strength at room temperature measured after the exposure is a value of ⁇ 20% or less, preferably ⁇ 17% or less of the bending strength at room temperature measured before the exposure.
  • the molded product is alternately exposed to a temperature environment of ⁇ 100 ° C. or more and 0 ° C. or less and a temperature environment of more than 0 ° C. and 120 ° C. or less for a predetermined time.
  • the Young's modulus at room temperature measured after the exposure is a value of ⁇ 15% or less, preferably ⁇ 12% or less of the Young's modulus at room temperature measured before the exposure.
  • ADF3Kai gene A partial amino acid sequence of ADF3 (NCBI accession number: AAC47010, GI: 1263287), which is one of the two main dragline proteins of the Nigori spider, was obtained from the NCBI web database, A gene encoding the start codon and the amino acid sequence (SEQ ID NO: 5) consisting of a His10 tag and an HRV3C protease (Humanrinovirus 3C protease) recognition site (SEQ ID NO: 4) at the N-terminus of the same sequence is consigned to GenScript. did.
  • a pUC57 vector (with an NdeI site immediately upstream of the 5 ′ end and an Xba I site immediately downstream of the 5 ′ end) into which the ADF3Kai gene consisting of the base sequence shown in SEQ ID NO: 6 had been introduced was obtained. Thereafter, the gene was treated with restriction enzymes with Nde I and EcoR I and recombined into a pET22b (+) expression vector.
  • pET22b (+) expression vector containing the ADF3Kai-noNR gene sequence obtained above was transformed into E. coli Rosetta (DE3). After culturing the obtained single colony in 2 mL of LB medium containing ampicillin for 15 hours, 1.4 mL of the same culture solution was added to 140 mL of LB medium containing ampicillin, and cultured at 37 ° C. and 200 rpm. The culture was continued until the OD 600 was 3.5. Then, OD 600 of the culture broth of 3.5, added with 50% glucose 140mL in 2 ⁇ YT medium 7L containing ampicillin, and further cultured until an OD 600 of 4.0.
  • IPTG isopropyl- ⁇ -thiogalactopyranoside
  • ⁇ Polypeptide preparation example> (I) About 4.5 g of Escherichia coli cells expressing the ADF3Kai-noNR protein and 30 mL of buffer AI (20 mM Tris-HCl, pH 7.4) were added to the centrifuge tube (50 mL), and a mixer (GE Disperse the cells with a product of SI-0286, Level 10), then centrifuge (10,000 rpm, 10 minutes, room temperature) with a centrifuge (Tomy Seiko, MX-305) and discard the supernatant. It was.
  • the dissolved protein solution is centrifuged (11,000 ⁇ g, 10 minutes, room temperature) with the above Tommy Seiko centrifuge, and the supernatant is dialyzed (Sanko Junyaku Co., Ltd., cellulose tube 36/32). And dialyzed against water.
  • the white aggregated protein obtained after dialysis was recovered by centrifugation, the water was removed with a freeze dryer, and the lyophilized powder was recovered.
  • the degree of purification of the target protein ADF3Kai-noNR in the obtained lyophilized powder was confirmed by image analysis of the results of polyacrylamide gel electrophoresis (CBB staining) of the powder using Totallab (nonlinear dynamics ltd.).
  • Example 1 ⁇ Molded body creation method> 1.35 g of the lyophilized powder (hereinafter referred to as “sample”) obtained in the above “Polypeptide Preparation Example” was weighed out, and this sample was used as a mold 2 (cylindrical mold) of the pressure molding machine 10 shown in FIG. And has a rectangular through hole having a cross section of 35 mm ⁇ 15 mm.). At this time, the sample was added so that the thickness was uniform. After all the samples have been introduced, heating of the mold 2 is started and the upper pin 4 and the lower pin 6 are inserted into the through-hole using a hand press machine (NT-100H-V09, manufactured by NPa System Co., Ltd.).
  • NT-100H-V09 manufactured by NPa System Co., Ltd.
  • the sample was pressurized by being inserted into. At this time, the pressure condition of the sample was controlled to be 40 kN. Stop heating when the sample temperature reaches 200 ° C, cool with a spot cooler (TS-25EP-1 manufactured by Trusco Nakayama Co., Ltd.), take out when the sample temperature reaches 50 ° C, and deburr. After the process, a molded body having a rectangular parallelepiped shape of 35 mm ⁇ 15 mm ⁇ 2 mm was obtained.
  • thermo-hygrostat manufactured by espec, LHL-113
  • a three-point bending test was performed using a scissors jig with an autograph (manufactured by Shimadzu Corporation, AG-X plus).
  • the load cell used was 50 kN.
  • the distance between fulcrums of the three-point bending was fixed to 27 mm, and the measurement speed was 1 mm / min.
  • the size of the molded product was measured with a micro caliper, and placed on a jig for measurement.
  • the flexural modulus was determined from the displacement (strain) from 0.05 to 0.25%.
  • ⁇ Transparency measurement method 1> For the obtained molded product, the transparency in the thickness direction (2 mm thickness) is measured visually, and when the transparency of the entire molded product is high, ⁇ , there are a few transparent but translucent or opaque parts The case where it does is set as (circle) and the case where it does not have transparency is set as x. That is, the molded product was placed on a paper printed with the Spiber logo, and the transparency was confirmed by seeing whether the logo was visible.
  • Example 2 In Example 1, heating was stopped when the temperature of the sample reached 200 ° C., cooled by a spot cooler, and taken out when the temperature of the sample reached 50 ° C. That is, the heating temperature (X) was 200 ° C., and the annealing time (Y) was 0 minutes because rapid cooling was started immediately after reaching the heating temperature.
  • a molded body was obtained in the same manner as in Example 1 except that the heating temperature (X) and the annealing time (Y) were changed as shown in Table 2 below and the pressing condition was changed to 30 kN. The obtained molded product was evaluated for transparency in the same manner as in Example 1 and summarized in Table 2.
  • Example 19 A molded body was obtained in the same manner as in Example 1 except that the heating temperature (X), the annealing time (Y), and the pressure conditions were as shown in Table 3 below. The obtained molded product was evaluated for transparency in the same manner as in Example 1 and summarized in Table 3.
  • Example 16 to 18 and 5 to 7 the bending elastic modulus and bending strength were measured in the same manner as in Example 1, and the transmittance was measured based on the following transparency measuring method 2. The results are shown in Table 4.
  • ⁇ Transparency measurement method 2> Using an ultraviolet-visible-near-infrared spectrophotometer (manufactured by Shimadzu Corporation, UV-2600), the transmittance was determined in the wave number range of 220 to 800 nm with an integration time of 0.1 second.
  • Example 25 had a bending strength change rate of ⁇ 20% or less and a Young's modulus change rate of ⁇ 15% or less even after the environmental temperature change was repeated 30 times.

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  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un corps moulé à partir d'une composition comprenant un polypeptide, la résistance à la flexion à température ambiante mesurée après une exposition alternée à un environnement de température supérieure à 0 °C et un environnement de température inférieur ou égal à 0 °C dans une plage de température allant de -100 °C à 120 °C, correspondant à une valeur inférieure ou égale à ± 20 % de la résistance à la flexion à température ambiante mesurée avant l'exposition.
PCT/JP2018/009988 2017-03-22 2018-03-14 Corps moulé et procédé de production de corps moulé WO2018173887A1 (fr)

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JP2016007746A (ja) * 2014-06-24 2016-01-18 三菱重工業株式会社 積層体、真空断熱材
WO2017047503A1 (fr) * 2015-09-18 2017-03-23 Ｓｐｉｂｅｒ株式会社 Article moulé et son procédé de fabrication
WO2017047504A1 (fr) * 2015-09-18 2017-03-23 Ｓｐｉｂｅｒ株式会社 Article moulé et procédé de fabrication d'article moulé
JP2017110132A (ja) * 2015-12-17 2017-06-22 国立大学法人室蘭工業大学 動物繊維成形物及びその製造方法
JP2017197730A (ja) * 2016-04-20 2017-11-02 国立大学法人室蘭工業大学 成形体の製造方法および成形体

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03211024A (ja) * 1990-01-17 1991-09-13 Nippon Valqua Ind Ltd 絹の固形化物の製造方法
JPH11246675A (ja) * 1998-02-27 1999-09-14 Masanori Midoritani フィブロインを混合したプラスチックス成形物
JP2009515212A (ja) * 2005-11-04 2009-04-09 ノキア コーポレイション オーディオ圧縮
JP2008173312A (ja) * 2007-01-19 2008-07-31 National Institute Of Agrobiological Sciences タンパク質フィルムの製造方法及びそれにより得られるタンパク質フィルム
JP2016007746A (ja) * 2014-06-24 2016-01-18 三菱重工業株式会社 積層体、真空断熱材
WO2017047503A1 (fr) * 2015-09-18 2017-03-23 Ｓｐｉｂｅｒ株式会社 Article moulé et son procédé de fabrication
WO2017047504A1 (fr) * 2015-09-18 2017-03-23 Ｓｐｉｂｅｒ株式会社 Article moulé et procédé de fabrication d'article moulé
JP2017110132A (ja) * 2015-12-17 2017-06-22 国立大学法人室蘭工業大学 動物繊維成形物及びその製造方法
JP2017197730A (ja) * 2016-04-20 2017-11-02 国立大学法人室蘭工業大学 成形体の製造方法および成形体

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