摘要:
A human healing ability enhancing apparatus includes an airtight part that is capable of being airtight; a decompression pump that decompresses air pressure in the airtight part and communicates with an exhaust port of the airtight part; and an over-decompression prevention device for preventing over-decompression in which the air pressure in the airtight part is lower than a predetermined threshold air pressure.
摘要:
A human healing ability enhancing apparatus includes an airtight part that is capable of being airtight; a decompression pump that decompresses air pressure in the airtight part and communicates with an exhaust port of the airtight part; and an over-decompression prevention device for preventing over-decompression in which the air pressure in the airtight part is lower than a predetermined threshold air pressure. The apparatus that can favorably provide a stimulus for enhancing healing capacity of a living body by a decompression control means sequentially and repeatedly controls a decompressing process in which air pressure in the airtight part that is capable of being airtight is changed to a decompression state that is equal to or higher than the threshold air pressure during 1 to 60 minute(s), and a pressurizing process in which the decompression state is changed to a wide-range normal pressure state that is a normal pressure or a pressure higher than the decompression state and lower than the normal pressure during 1 to 60 minute(s) can be obtained.
摘要:
A polyglycolic acid-based resin composition is formed by adding a relatively small amount of aromatic polyester resin to a polyglycolic acid resin. The thus-formed composition is provided with remarkably improved moisture resistance stability and hot-melt processability, and further improved stretchability, while retaining the excellent properties as represented by gas barrier property of the polyglycolic acid resin. As a result of stretching by utilizing the improved stretchability, a shaped product having an improved transparency can be obtained.
摘要:
Polyhydroxycarhoxylic acids are provided, which are controlled in terms of the rate of biodegradability, and give molded or otherwise formed articles that are of uniform quality with neither premature strength drop nor premature deterioration of retention of outside shape, and their production process is provided as well. The poly-hydroxycarboxylic acids are obtained by ring-opening polymerization of cyclic esters. The polyhydroxy-carboxylic acids have a weight-average molecular weight (Mw) in the range of 10,000 to 1,000,000, a molecular weight distribution in the range of 1.0 to 2.5 as represented by the weight-average molecular weight-to-number-average molecular weight ratio (Mw/Mn) and a yellowness index (YI) of 40 or less, and have a precisely controlled rate of biodegradability.
摘要:
The present invention provides a process for production of a cyclic ester by depolymerization of an aliphatic polyester. In the process, a mixture containing the aliphatic polyester and a specific polyalkylene glycol ether, which has a boiling point of 230-450° C. and a molecular weight of 150-450, is heated under normal or reduced pressure to a temperature at which depolymerization of the aliphatic polyester takes place. Then, a substantially homogeneous solution phase, consisting of the melt phase of the aliphatic polyester and the liquid phase of the polyalkylene glycol ether, is formed. Heating of the solution phase is continued to form the cyclic ester by depolymerization and distil out the cyclic ester together with the polyalkylene glycol ether, and then the cyclic ester is recovered from the distillate. The present invention also provides a process for purification of a crude cyclic ester by use of the specific polyalkylene glycol ether described above.
摘要:
The invention provides a polyester production process by bulk polymerization in a reactor, wherein the volume of the resulting polyester is shrunk for a release from the inner surface of the reactor, so that the polyester can be recovered in the form of a bulky mass. The invention also provides a reactor for bulk polymerization for polyester, which comprises an inner surface that enabling the resulting polyester to be released therefrom upon its volume shrinkage.
摘要:
The invention provides a stretch blow molded container formed from a thermoplastic resin material which comprises polyglycolic acid having(a) a repeating unit represented by the following formula (1): ##STR1## (b) a melt viscosity, .eta.* [as measured at a temperature of (the melting point, Tm of the polymer+20.degree. C.) and a shear rate of 100/sec] of 500-100,000 Pa.s;(c) a melting point, Tm of at least 180.degree. C.;(d) a melt enthalpy, .DELTA.Hm of at least 20 J/g; and(e) a density of at least 1.50 g/cm.sup.3 as measured in an unoriented, crystallized form,wherein the stretch blow molded container has tensile strength (in a circumferential direction) of at least 100 MPa and a carbon dioxide permeability (as measured at a temperature of 23.degree. C. and 80% relative humidity; in terms of the thickness of 50 .mu.m) of 300 cc/m.sup.2.day.atm or smaller at the body sidewall thereof, and a production process thereof.
摘要:
The invention provides a stretch blow molded container formed from a thermoplastic resin material which comprises polyglycolic acid having(a) a repeating unit represented by the following formula (1): ##STR1## (b) a melt viscosity, .eta.* [as measured at a temperature of (the melting point, Tm of the polymer+20.degree. C.) and a shear rate of 100/sec] of 500-100,000 Pa.multidot.s;(c) a melting point, Tm of at least 180.degree. C.;(d) a melt enthalpy, .DELTA.Hm of at least 20 J/g; and(e) a density of at least 1.50 g/cm.sup.3 as measured in an unoriented, crystallized form,wherein the stretch blow molded container has tensile strength (in a circumferential direction) of at least 100 MPa and a carbon dioxide permeability (as measured at a temperature of 23.degree. C. and 80% relative humidity; in terms of the thickness of 50 .mu.m) of 300 cc/m.sup.2 .multidot.day.multidot.atm or smaller at the body sidewall thereof, and a production process thereof.
摘要翻译:本发明提供一种由热塑性树脂材料形成的拉伸吹塑成型容器,该容器包含聚乙醇酸,该聚乙醇酸具有(a)由下式(1)表示的重复单元:(b)熔体粘度eta * [在 (熔点,聚合物的Tm + 20℃)和100 /秒的剪切速率]为500-10000Pax; (c)熔点Tm为至少180℃。 (d)熔体焓,至少20J / g的DELTA Hm; 和(e)以非取向的结晶形式测量的至少1.50g / cm 3的密度,其中拉伸吹塑成型容器的拉伸强度(在圆周方向)为至少100MPa,二氧化碳渗透性(测量 在23℃和80%相对湿度的温度下,在其体侧壁为300cc / m 2×day×atm以下的厚度为50μm),及其制造方法。
摘要:
A process for obtaining aromatic sulfide polymer which has a markedly high molecular weight and can be readily formed into films, fibers, and other structures. The process comprises heating, in an aprotic solvent to a temperature of 100.degree. to 250.degree. C., (i) a dihaloaromatic compound and (ii) substantially anhydrous fine powder of the sulfide of an alkali or alkaline earth metal in the presence of (iii) substantially anhydrous fine powder of the carbonate of an alkali or alkaline earth metal, or of a mixture thereof with a hygroscopic inorganic salt and (iv) a strictly controlled very small amount of water dissolved in or solvated with the solvent.
摘要:
A controlled release pharmaceutical composition comprises (a) at least one pharmaceutically active substance having a water contact angle (θ) such that cos θ is between +0.9848 and −0.9848, (b) a first intelligent polymer component; and (c) a second intelligent polymer component having opposite wettability characteristics to the first intelligent polymer component, the first and second polymer components being present in a ratio in the range of about 1:100 to about 100:1 by weight. The polymer components are effective for controlled release of the pharmaceutically active substance from the composition.