An article is molded from first and second thermosetting elastomer compositions each comprising free-radically curable elastomer and free radical initiator but different from one another. The first thermosetting elastomer composition is molded to fill a first area of a mold cavity at a first temperature at which the first free radical initiator has a half-lifeabout 10 minutes or at which the first thermosetting elastomer composition has an increase in torque less than 10% of a total increase in torque at full cure. The second thermosetting elastomer composition is then inserted into the mold cavity, and the mold is heated to fully cure the article, for example a temperature at which each free radical initiator has a half-lifeabout 1 minute, with the second composition filling a second area of the mold cavity before or during heating and curing.

According to an embodiment, disclosed is a curing-device comprising: a stage; a light emitting module including a substrate disposed on the stage and a plurality of light emitting elements disposed on the substrate; and a plurality of transparent blocks disposed between the light emitting module and the stage, wherein the substrate includes a plurality of first sections and a plurality of second sections which are disposed in a first direction, the intervals in the first direction between the light emitting elements disposed in the first sections is smaller than the intervals in the first direction between the light emitting elements disposed in the second sections, and the plurality of transparent blocks are disposed on the first sections.

According to an embodiment, disclosed is a curing-device comprising: a stage; a light emitting module including a substrate disposed on the stage and a plurality of light emitting elements disposed on the substrate; and a plurality of transparent blocks disposed between the light emitting module and the stage, wherein the substrate includes a plurality of first sections and a plurality of second sections which are disposed in a first direction, the intervals in the first direction between the light emitting elements disposed in the first sections is smaller than the intervals in the first direction between the light emitting elements disposed in the second sections, and the plurality of transparent blocks are disposed on the first sections.

A method for preparing a PBAT laminated membrane composite material uses PBAT or a material with PBAT as the main component and other biodegradable plastic or superfine calcium carbonate in a mixture. The temperature of the mixture is increased by means of a lamination machine segment by segment, the material is heated slowly to a molten state, and the temperature of a rolling shaft is controlled by introducing cold water to the rolling shaft when the lamination machine conducts membrane lamination, so that the temperatures of rolling wheels and the laminated membrane are controlled.

A method for preparing a PBAT laminated membrane composite material uses PBAT or a material with PBAT as the main component and other biodegradable plastic or superfine calcium carbonate in a mixture. The temperature of the mixture is increased by means of a lamination machine segment by segment, the material is heated slowly to a molten state, and the temperature of a rolling shaft is controlled by introducing cold water to the rolling shaft when the lamination machine conducts membrane lamination, so that the temperatures of rolling wheels and the laminated membrane are controlled.

Systems are disclosed for curing composite parts within a container, wherein a pressurized environment may be created via a body of water. Disclosed systems may include the container, a heating system, and a mechanism for raising and/or lowering the container within the body of water. The container may include one or more rigid walls, one or more non-rigid walls, and/or one or more port holes extending through one or more of the rigid walls and/or non-rigid walls. Methods of curing composite parts using such systems are also disclosed. Methods may include providing a container having a cavity configured to receive a composite part, thermally coupling a heating system to the container, inserting the composite part into the cavity, submerging the container under a depth of external liquid, flowing a volume of fluid into the cavity, heating the volume of fluid, thereby curing the composite part.

The invention pertains to a fluoroelastomer composition comprising: at least one fluoroelastomer [perfluoroelastomer (A)], said fluoroelastomer (A) comprising iodine and/or bromine atoms and having a backbone comprising: recurring units derived from tetrafluoroethylene (TFE); recurring units derived from at least one perfluorinated monomer selected from the group consisting of: perfluoroalkylvinylethers complying with formula CF.sub.2CFOR.sub.f1 in which Rn is a C.sub.1-C.sub.6 perfluoroalkyl (monomers of this type being referred to, herein after, as PAVE), e.g. CF.sub.3, C.sub.2F.sub.5, C.sub.3F.sub.7; perfluoro-oxyalkylvinylethers complying with formula CF.sub.2CFOX.sub.0, in which X.sub.0 can be (i) a C.sub.1-C.sub.12 perfluorooxyalkyl having one or more ether groups, e.g. C.sub.2F.sub.5OCF.sub.3; or (ii) a group of formula CF.sub.2OR.sub.f2 in which R.sub.f2 is a C.sub.1-C.sub.6 perfluoroalkyl, e.g. CF.sub.3, C.sub.2F.sub.5, C.sub.3F.sub.7 (monomers of this type being referred to, herein after, as MOVE); recurring units derived from vinylidene fluoride (VDF) in an amount of up to 30% by moles, with respect to the total moles of recurring units; and optionally, recurring units derived from at least one perfluorinated C.sub.3-C.sub.8 alpha-olefin, in an amount of up to 5% moles; optionally, recurring units derived from at least one fluorine-free alpha-olefin, in an amount of up to 10% moles; from 0.5 to 5 weight parts, per 100 parts by weight of said fluoroelastomer (A), of at least one polyunsaturated compound; from 0.1 to 3 weight parts, per 100 parts by weight of said fluoroelastomer (A), of at least one organic peroxide; from 0.1 to 3 weight parts, per 100 parts by weight of said fluoroelastomer (A), of at least one organic base [base (B)] selected from the group consisting of: (i) non-aromatic primary amines or amides complying with general formula (B1m) or (Bid):
R.sub.bm[C(O)].sub.tNH.sub.2(B1m)
H.sub.2N[C(O)].sub.tR.sub.dm[C(O)].sub.tNH.sub.2(B1d)
wherein: each of t, t and t, equal to or different from each other and at each occurrence is zero or 1; R.sub.bm is a monovalent hydrocarbon non-aromatic group having 12 to 30 carbon atoms; R.sub.bm is a divalent hydrocarbon non-aromatic group having 6 to 30 carbon atoms; and (ii) cycloaliphatic secondary or tertiary amines complying with general formula (B2m) or (B2d) wherein: Cy represents a divalent aliphatic group comprising at least 4 carbon a

The invention pertains to a fluoroelastomer composition comprising: at least one fluoroelastomer [perfluoroelastomer (A)], said fluoroelastomer (A) comprising iodine and/or bromine atoms and having a backbone comprising: recurring units derived from tetrafluoroethylene (TFE); recurring units derived from at least one perfluorinated monomer selected from the group consisting of: perfluoroalkylvinylethers complying with formula CF.sub.2CFOR.sub.f1 in which Rn is a C.sub.1-C.sub.6 perfluoroalkyl (monomers of this type being referred to, herein after, as PAVE), e.g. CF.sub.3, C.sub.2F.sub.5, C.sub.3F.sub.7; perfluoro-oxyalkylvinylethers complying with formula CF.sub.2CFOX.sub.0, in which X.sub.0 can be (i) a C.sub.1-C.sub.12 perfluorooxyalkyl having one or more ether groups, e.g. C.sub.2F.sub.5OCF.sub.3; or (ii) a group of formula CF.sub.2OR.sub.f2 in which R.sub.f2 is a C.sub.1-C.sub.6 perfluoroalkyl, e.g. CF.sub.3, C.sub.2F.sub.5, C.sub.3F.sub.7 (monomers of this type being referred to, herein after, as MOVE); recurring units derived from vinylidene fluoride (VDF) in an amount of up to 30% by moles, with respect to the total moles of recurring units; and optionally, recurring units derived from at least one perfluorinated C.sub.3-C.sub.8 alpha-olefin, in an amount of up to 5% moles; optionally, recurring units derived from at least one fluorine-free alpha-olefin, in an amount of up to 10% moles; from 0.5 to 5 weight parts, per 100 parts by weight of said fluoroelastomer (A), of at least one polyunsaturated compound; from 0.1 to 3 weight parts, per 100 parts by weight of said fluoroelastomer (A), of at least one organic peroxide; from 0.1 to 3 weight parts, per 100 parts by weight of said fluoroelastomer (A), of at least one organic base [base (B)] selected from the group consisting of: (i) non-aromatic primary amines or amides complying with general formula (B1m) or (Bid):
R.sub.bm[C(O)].sub.tNH.sub.2(B1m)
H.sub.2N[C(O)].sub.tR.sub.dm[C(O)].sub.tNH.sub.2(B1d)
wherein: each of t, t and t, equal to or different from each other and at each occurrence is zero or 1; R.sub.bm is a monovalent hydrocarbon non-aromatic group having 12 to 30 carbon atoms; R.sub.bm is a divalent hydrocarbon non-aromatic group having 6 to 30 carbon atoms; and (ii) cycloaliphatic secondary or tertiary amines complying with general formula (B2m) or (B2d) wherein: Cy represents a divalent aliphatic group comprising at least 4 carbon a

A composite forming apparatus includes an end effector, a forming feature that is coupled to the end effector, and a heating element that is coupled to the forming feature to heat the forming feature. The end effector moves the forming feature relative to a composite ply to form the composite ply over a forming tool or over a prior formed composite ply. The forming feature heats the composite ply via conduction.

According to an embodiment, disclosed is a curing-device comprising: a stage; a light emitting module including a substrate disposed on the stage and a plurality of light emitting elements disposed on the substrate; and a plurality of transparent blocks disposed between the light emitting module and the stage, wherein the substrate includes a plurality of first sections and a plurality of second sections which are disposed in a first direction, the intervals in the first direction between the light emitting elements disposed in the first sections is smaller than the intervals in the first direction between the light emitting elements disposed in the second sections, and the plurality of transparent blocks are disposed on the first sections.