Provided is a glass direct roving that can achieve good productivity for long glass fiber-reinforced thermoplastic resin pellets, and achieve excellent spinning productivity and good strength of glass fiber-reinforced resin molded articles produced by using long glass fiber-reinforced thermoplastic resin pellets in combination. The glass direct roving includes a plurality of glass filaments bundled together, wherein the filament diameter of the glass filaments, D, is in the range of 17.5 to 21.5 μm, the number of the glass filaments bundled, F, is in the range of 3000 to 7000, the mass of the glass direct roving is in the range of 2450 to 4000 tex, the ignition loss of the glass direct roving, L, is in the range of 0.03 to 0.90%, and the D, F, and L satisfy the following formula (1):

[00001]$\begin{array}{cc}1050\le \left(D^4\times F^{1/4}\right)/\left(1000\times L^{1/6}\right)\le 1640& \left(1\right)\end{array}$

The invention relates to a branched copolymer containing rigid blocks and flexible blocks, wherein the branchings are made by a polyol residue binding rigid blocks of the copolymer, said polyol being a polyol comprising at least three hydroxyl groups, said copolymer having a weight-average molar mass Mw of greater than or equal to 80 000 g/mol, and wherein the ratio of the weight-average molar mass Mw of the copolymer to the number-average molar mass Mn of the copolymer is greater than or equal to 2.2.

The invention also relates to a process for manufacturing such a copolymer and also to a foam of such a copolymer, to a process for manufacturing such a foam and articles made from such a foam.

Described herein are methods of preparing compounds derived from triglycerides or condensation polymers such as polyesters and/or polyamides. The methods may include subjecting triglyceride or condensation polymer containing matter to mechanical processing in the presence of a nucleophile.

A recycling process for a polyamide waste material includes the following steps: adding a polyamide waste material into a mixed solvent to obtain a solution, heating the solution to 50° C. to a reflux temperature of the solution, conducting stirring for dissolution, and then conducting decolorization treatment and filtration to obtain a polyamide solution; and adding the polyamide solution into water, precipitating polyamide as a solid in deionized water, and conducting separation to obtain recycled polyamide. The mixed solvent includes, in parts by weight, 10-30 parts of phenol and 15-40 parts of toluene.

A subject-matter of the present invention are new complexes comprising cyclic alkylene carbonates and polyamides, processes for their preparation and uses. Additionally, a subject-matter of the invention is the use of alkylene carbonates for recycling, solubilization, purification, and/or powdering of polyamide-based materials.

Disclosed are: a tube containing a layer that contains 60 to 80% by mass of a semi-aromatic polyamide and 15 to 40% by mass of an elastomer modified with an unsaturated compound having at least one selected from a carboxy group and an acid anhydride group, wherein the layer has a phase-separated structure containing a phase (A) that contains the semi-aromatic polyamide, and a phase (B) that contains the elastomer, and the phase (A) is a continuous phase and the phase (B) is a disperse phase dispersed in the phase (A), and in a cross-sectional image of the layer as observed with an electron microscope, the average number of the phase (B) having a major axis diameter of 2 μm or more and existing per 100 square μm is 1/100 μm.sup.2 or less; and a polyamide resin composition prepared by melt-kneading a semi-aromatic polyamide and an elastomer modified with an unsaturated compound having at least one selected from a carboxy group and an acid anhydride group, wherein the total concentration of the carboxy group and the acid anhydride group in 1 g of the elastomer is 85 to 250 μeq/g.

Provided is a structure having excellent flexibility represented by elastic restoring from compression or tensile elongation at break, and excellent lightness. A structure according to the present invention includes reinforced fibers, first plastic, and second plastic that exhibits rubber elasticity at room temperature, the reinforced fibers being discontinuous fibers, and the first plastic and/or the second plastic coating a crossing point between the reinforced fibers in contact with each other.

An article that can be used for biomaterial capture comprises (a) a porous substrate; and (b) borne on the porous substrate, a polymer comprising interpolymerized units of at least one monomer consisting of (1) at least one monovalent ethylenically unsaturated group, (2) at least one monovalent ligand functional group selected from acidic groups, basic groups other than guanidino, and salts thereof, and (3) a multivalent spacer group that is directly bonded to the monovalent groups so as to link at least one ethylenically unsaturated group and at least one ligand functional group by a chain of at least six catenated atoms.

A film, a manufacturing method of the film, a cover film, and a multi-layered electronic device include an elastic layer having a storage modulus index K.sub.SM of 20 to 350 Mpa represented by Equation 1 below and a haze of 3% or less, thereby providing the film having substantially low storage modulus variations over a wide temperature range, with good mechanical properties such as excellent elastic recovery force and good optical properties such as low haze, and provide the cover film or the multi-layered electronic device including the same.

[00001]$\begin{array}{cc}{K}_{\mathrm{SM}}=\left(\frac{{\mathrm{SM}}_{-40}\times {\mathrm{SM}}_{80}}{{\mathrm{SM}}_{20}}\right)-{\mathrm{SM}}_{80}& \left[\mathrm{Equation}1\right]\end{array}$ Where SM.sub.n is a storage modulus (Mpa) measured at a temperature of n° C.

A gear is provided that has excellent continuous moldability for practical use, and both high slidability and high durability. The provided gear is a molded resin constructed of a resin composition comprising a thermoplastic resin (A) and cellulose nanofibers (B) with an average fiber diameter of 1000 nm or smaller, and having a number average molecular weight of the thermoplastic resin (A) in the range of 10,000 to 150,000, wherein a sliding surface of the gear with another gear teeth has an arithmetic mean surface roughness Sa of 3.0 μm or lower.