In the manufacture of extruded polymers there are a number of surface defects referred to as sharkskin, snakeskin and orange peel which all generally relate to the rheology of the polymer melt. A severe form of surface defect is “melt fracture” which is believed to result when the shear rate at the surface of the polymer is sufficiently high that the surface of the polymer begins to fracture. That is, there is a slippage of the surface of the extruded polymer relative to the body of the polymer melt. The surface generally can't flow fast enough to keep up with the body of the extrudate and a fracture in the melt occurs generally resulting in a severe loss of surface properties for the extrudate. A polymer extension process is disclosed wherein these undesirable surface defects are eliminated.

A method for producing a semiconductor element by wafer-level chip-size packaging includes applying a liquid compression molding material to a wafer after completion of circuit formation and subjecting the wafer to sealing treatment by compression molding. The liquid compression molding material includes (A) an epoxy resin; (B) a curing agent; and (C) a filler. The liquid compression molding material having a thixotropic index (TI) of 0.8 to 4.0.

A method is provided for producing a multi-section plastic component in which a first plastic injection-molded individual part and a second plastic injection-molded individual part are formed. The plastic injection-molded individual parts are joined by injecting a plastic moulding compound. The plastic molding compound is a non-elastomeric thermoplastic and forms a plastic connecting component following a curing process. The plastic injection-molded individual parts and plastic connecting component are then at least partially painted.

Over an outer peripheral surface of a sleeve, a primer layer is formed that is a thermoplastic resin-based adhesive thermally melted at a temperature lower than a melting point of a thermoplastic resin formed into a resin member to exhibit adhesiveness. With the sleeve preheated, a thermoplastic resin to be formed into the resin member is annularly injection-molded over an outer periphery of the sleeve.

Methods of making recyclable heavy-gauge films are provided. The methods of the present disclosure involve bonding the inner layers of a coextruded blown film together such that the film is sufficiently thick enough for it to be oriented in the MDO section using the typical 5:1 orientation ratio and result in a film with twice the gauge typically made by the MDO process (while maintaining acceptable stiffness and dimensional rigidity). Recyclable heavy-gauge films formed by the methods are also provided.

Impact copolymer (ICP) compositions may include those having a melt strength (MS) and melt flow rate (MFR) described according to the formula: MS≥325×MFR.sup.−1.7, wherein the MS is greater than 1 cN. Methods of producing an impact copolymer (ICP) composition may include coupling the ICP composition with a coupling agent, wherein the ICP composition includes a matrix polymer and a dispersed component; wherein the ICP composition possesses a measurable melt strength (MS) and melt flow rate (MFR) satisfying the equation: MS≥325×MFR.sup.−1.7, wherein the MS is greater than 1 cN.

An embodiment can provide a polyamide-imide film and a method for producing same, the film comprising a polyamide-imide polymer formed by polymerizing an aromatic diamine compound, an aromatic dianhydride compound and a dicarbonyl compound, wherein, in an XRD graph with a section in which 2θ=8° to 32° as a baseline, the film shows a peak area of 50% or above around 2θ=23° with respect to a peak area seen around 2θ=15°.

A polyethylene terephthalate composition (PET), an injection-molded bottle preform made from a PET composition, a refillable PET container blow-molded from the preform, catalyst compositions used for making the PET composition, methods for making the PET composition, methods for injection-molding a PET bottle preform, methods for blow-molding a refillable PET bottle from a preform and methods for improving the rewash stability and recyclability of refillable PET bottles particularly for carbonated soft drinks are disclosed. The polyethylene terephthalate composition includes a polyester resin containing terephthalic acid, isophthalic acid, ethylene glycol and cyclohexane dimethanol and residual amount of catalytic composition comprising Sb and Ti. The polyethylene terephthalate composition is especially useful for large blow moldings and provides a change in the fill point volume after 5 wash cycles of a 2.5 liter blow molded bottle of 14 ml or less.

Injection molded article for healthcare applications based on propylene homopolymer.

The present invention lies in the field of 3D printing methods. In particular, the invention relates to 3D printing methods for the production of a 3D part in a layer-by-layer manner, wherein the printable composition is a pasty polyurethane composition comprising at least one polyisocyanate resin, at least one monomer and/or prepolymer that is polymerizable by exposure to radiation and at least one photoinitiator, wherein the pasty polyurethane composition has a viscosity factor (1.5/15) of at least 2 at application temperature.