1. A melt blended styrene-based resin composition comprising (A) a styrene-based resin, (B) a thermoplastic resin other than styrene-based resins, (c1) a modified styrene-based polymer containing vinyl-based monomer units respectively containing at least one kind of a functional group selected from the group consisting of an epoxy group and an oxazoline group, and (c2) a polycarbonate-based graft polymer, wherein the styrene-based resin (A) and the thermoplastic resin other than styrene-based resins (B) have a co-continuous structure with a wavelength of concentration fluctuation of 0.001 to 1 \u03bcm or a dispersed structure with a distance between particles of 0.001 to 1 \u03bcm, wherein the melt blended styrene-based resin composition is formed via melt blending at a resin pressure kept at 2.0 MPa to 5.0 MPa at least at one or more places in the melt blending space or temporarily during the melt blending period of time.
2. The melt blended styrene-based resin composition, according to claim 1, wherein the styrene-based resin (A) and the thermoplastic resin other than styrene-based resins (B) have a co-continuous structure with a wavelength of concentration fluctuation of 0.01 to 0.5 \u03bcm or a dispersed structure with a distance between particles of 0.01 to 0.5 \u03bcm.
3. The melt blended styrene-based resin composition, according to claim 1, wherein the polycarbonate-based graft polymer (c2) contains a polycarbonate resin segment and a vinyl-based polymer segment.
4. The melt blended styrene-based resin composition, according to claim 1, wherein the styrene-based resin (A) contains styrene-based monomer units respectively substituted by an alkyl group with 1 to 4 carbon atoms.
5. The melt blended styrene-based resin composition, according to claim 1, wherein the thermoplastic resin other than styrene-based resins (B) is (b) a polycarbonate resin.
6. The melt blended styrene-based resin composition, according to claim 5, wherein said polycarbonate resin (b) contains an aromatic copolymerized polycarbonate obtained by copolymerizing (b1) 2,2\u2032-bis(4-hydroxyphenyl)propane and (b2) at least one bifunctional phenol-based compound selected from 2,2\u2032-bis(4-hydroxy-3,5-dimethylphenyl)propane, 2,2\u2032-bis(4-hydroxy-3,5-diethylphenyl)propane and 2,2\u2032-bis(4-hydroxy-3,5-dipropylphenyl)propane.
7. The melt blended styrene-based resin composition, according to claim 1, wherein the styrene-based resin (A) and the thermoplastic resin other than styrene-based resins (B) are a combination satisfying the following formula (1) specifying the ratio of the melt viscosities of the respective resins at the temperature T(\xb0 C.) satisfying the following formula (2)
ab\u22670.1\u2003\u2003(1)
180\u2266T\u2266300\u2003\u2003(2)
a: Melt viscosity of the styrene-based resin (A) (temperature T\xb0 C., shear rate 1000sec) (Pa\xb7s)
b: Melt viscosity of the thermoplastic resin other than styrene-based resins (B) (temperature T\xb0 C., shear rate 1000sec) (Pa\xb7s).
8. The melt blended styrene-based resin composition, according to claim 1, wherein the styrene-based resin (A) contains (a1) 20 to 75 wt % of styrene-based monomer units, (a2) 25 to 60 wt % of vinyl cyanide-based monomer units, and (a3) 0 to 55 wt % of other vinyl-based monomer units copolymerizable with the foregoing, the total amount of (a1) through (a3) being 100 wt %.
9. A method for manufacturing the melt blended styrene-based resin composition as set forth in claim 1, comprising the step of melt-blending the styrene-based resin (A), the thermoplastic resin other than styrene-based resins (B), the modified styrene-based polymer (c1) and the polycarbonate-based graft polymer (c2), wherein said melt blending is performed with a resin pressure kept at 2.0 MPa to 5.0 MPa at least at one or more places in the melt blending space or temporarily during the melt blending period of time.
10. The method for manufacturing the styrene-based resin composition, according to claim 7, wherein the components (A), (B), (c1) and (c2) are miscible under shear flow during said melt blending, and phase separation occurs under no shear flow after discharge.
11. A molded article composed of the melt blended styrene-based resin composition as set forth in claim 1.
12. The molded article, according to claim 9, which is painted or plated.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A web winding changeover apparatus provided in a turret winder having a first winding spindle and a second winding spindle, a first core being removably attached to said first winding spindle, a second core being removably attached to said second winding spindle, and said web winding changeover apparatus changing over from a web winding around said first core to said second core, comprising:
a cutting drum disposed on a first side with respect to a transporting path of said web and having a cutter for cutting said web in a width direction thereof;
a receiving drum having a cross section of a circular shape disposed on a second side with respect to said transporting path;
a drum support arm for supporting each of said cutting drum and said receiving drum such that said cutting drum and said receiving drum rotate while peripheral surfaces of said cutting drum and said receiving drum contact each other at the time of cutting said web;
a shifter for shifting said drum support arm between a web winding changeover position for pressing a peripheral surface of said receiving drum against said second core and a spacing position for keeping said peripheral surface of said receiving drum away from said second core; and
a guide roller shifting between an approaching position and a retracted position, in said approaching position said guide roller approaching said transporting path to guide said web while preventing said web from contacting said receiving drum, and in said retracted position said guide roller retracting from said transporting path to cause said web to contact said receiving drum.
2. A web winding changeover apparatus as defined in claim 1, wherein said guide roller moves to said approaching position when said drum support arm moves to said spacing position, and moves to said retracted position when said drum support arm moves to said web winding changeover position.
3. A web winding changeover apparatus as defined in claim 2, wherein said cutting drum has a cross section of a sector shape including a cutout portion, said cutout portion faces toward said transporting path of said web during winding of said web, and said cutting drum further rotates once to cut said web.
4. A web winding changeover apparatus as defined in claim 3, wherein said guide roller is present in said cutout portion of said cutting drum when being set to the approaching position.
5. A web winding changeover apparatus as defined in claim 4, wherein said guide roller is driven to rotate in accordance with a transporting speed of said web.
6. A web winding changeover apparatus as defined in claim 4, wherein said guide roller is supported by a rotatable guide roller support arm, and said guide roller support arm is coaxial with said receiving drum.
7. A web winding changeover method for changing over from a web winding around a first core to a second core, said first core being removably attached to a first winding spindle of a turret winder, said second core being removably attached to a second winding spindle of said turret winder, said web winding changeover method comprising the steps of:
retracting said first core having a web roll and setting said second core to a winding position simultaneously,
moving a drum support arm supporting a cutting drum having a cross section of a sector shape and a receiving drum having a cross section of a circular shape from an initial position to a preparation position in front of a web winding changeover position, in said preparation position said receiving drum being kept away from said second core;
moving a guide roller from an approaching position to a retracted position, in said approaching position said guide roller lifting said web such that said web does not contact with a peripheral surface of said receiving drum, and in said retracted position said web contacting with said peripheral surface of said receiving drum;
rotating said receiving drum in accordance with a transporting speed of said web during movement of said guide roller;
moving said drum support arm to said web winding changeover position, in which said web is nipped between said receiving drum and said second core;
rotating said cutting drum once in contact with said receiving drum to cut said web, said cutting drum stopping at a position where said cutout portion faces toward said receiving drum after cutting of said web;
fixing a front end of said web formed by cutting to a periphery of said second core and starting winding of said web around said second core;
moving said guide roller to said approaching position; and
moving said drum support arm to said initial position.
8. A web winding changeover method as defined in claim 7, wherein said guide roller is present in said cutout portion of said receiving drum at the time of being in said approaching position.