A dental appliance for positioning a patient's teeth includes a removable orthodontic tooth positioning appliance having teeth receiving cavities shaped to directly receive at least some of the patient's teeth and apply a resilient positioning force to the patient's teeth. The appliance includes a hard polymer layer having a hard polymer layer elastic modulus disposed between a first soft polymer layer having a first soft polymer layer elastic modulus and a second soft polymer layer having a second soft polymer layer elastic modulus. The hard polymer layer elastic modulus is greater than each of the first soft polymer layer elastic modulus and the second soft polymer layer elastic modulus. At least one of the first soft polymer layer and the second soft polymer layer has a flexural modulus of greater than about 35,000 psi.

The present disclosure relates to new laminate films whereby a contact layer is adhesive laminated to a base layer, such as a metal foil, or whereby a co-extrusion layer comprising a contact layer and at least one tie layer is adhered to a base layer, as well as uses of the laminate films to wrap APIs such as nicotine, fentanyl, lidocaine and rivastigmine, wherein the contact layer comprises COC, PA, EVOH, CBC, PVDF, COP, HDPE or EMAA.

The present invention provides an optically clear adhesive sheet that has excellent flexibility and prevents delay bubbles in high temperature and high humidity environments. The optically clear adhesive sheet of the present invention sequentially includes a first surface-adhesive layer, an intermediate adhesive layer, and a second surface-adhesive layer. The first surface-adhesive layer and the second surface-adhesive layer each have a higher storage elastic modulus at 85° C. than the intermediate adhesive layer. The first surface-adhesive layer and the second surface-adhesive layer each have a storage elastic modulus at 85° C. of 3.0×10.sup.4 Pa or higher and 30.0×10.sup.4 Pa or lower. The intermediate adhesive layer has a storage elastic modulus at 85° C. of 1.0×10.sup.4 Pa or higher and 15.0×10.sup.4 Pa or lower. The intermediate adhesive layer contains polyurethane.

A dental appliance for positioning a patient's teeth includes a removable orthodontic tooth positioning appliance having teeth receiving cavities shaped to directly receive at least some of the patient's teeth and apply a resilient positioning force to the patient's teeth. The appliance includes a hard polymer layer having a hard polymer layer elastic modulus disposed between a first soft polymer layer having a first soft polymer layer elastic modulus and a second soft polymer layer having a second soft polymer layer elastic modulus. The hard polymer layer elastic modulus is greater than each of the first soft polymer layer elastic modulus and the second soft polymer layer elastic modulus. At least one of the first soft polymer layer and the second soft polymer layer has a flexural modulus of greater than about 35,000 psi.

A polypropylene environmentally friendly advertising cloth having a fabric base layer (20), which is a mesh braid made of Polypropylene woven by warp thread (21) and weft thread (22); a first waterproof and fireproof layer (30) and a second waterproof and fireproof layer (40) which are made by coating an aqueous polyacrylate coating slurry on the first surface (24) and the second surface (25) to form a thin film layer, the aqueous polyacrylate coating slurry penetrating the meshes (11); an ink-absorbing layer (50) which are made by coating a water absorption coating material that made of acrylic on the second waterproof and fireproof layer (40). The present invention is PVC free and non-toxic, so that it is particularly suitable for indoor advertising and interior decoration and fulfills the use for medical purposes.

A dental appliance for positioning a patient's teeth includes a removable orthodontic tooth positioning appliance having teeth receiving cavities shaped to directly receive at least some of the patient's teeth and apply a resilient positioning force to the patient's teeth. The appliance includes a hard polymer layer having a hard polymer layer elastic modulus disposed between a first soft polymer layer having a first soft polymer layer elastic modulus and a second soft polymer layer having a second soft polymer layer elastic modulus. The hard polymer layer elastic modulus is greater than each of the first soft polymer layer elastic modulus and the second soft polymer layer elastic modulus. At least one of the first soft polymer layer and the second soft polymer layer has a flexural modulus of greater than about 35,000 psi.

Disclosed is a vinylidene fluoride-based resin multi-layered film including two layers composed of a front surface layer laminated on a rear surface layer, in which the front surface layer contains 80% by mass or more of a vinylidene fluoride-based resin and 20% by mass or less of a methacrylic acid ester-based resin, the degree of crystallization of the front surface layer is 45% or higher, the ratio occupied by α-crystals in the entire crystal component of the vinylidene fluoride-based resin is 60% or higher, the thickness of the front surface layer is 15 μm or more, and the rear surface layer contains 90% by mass or more of a methacrylic acid ester-based resin.

A drone frame includes first and second carbon fiber layers, and a center clear layer positioned between the first and second carbon fiber layers. A cutout is formed through an entire thickness of the first carbon fiber layer so as to expose a portion of the center clear layer. An LED unit is positioned in the cutout. The LED unit has a plurality of LEDs on a bottom thereof such that the LEDs abut the center clear layer. Light is transmitted from the LEDs through the center clear layer so as to illuminate the perimeter of the drone frame. A composite material used in the drone frame and a method of forming the composite material and drone frame are also disclosed.

A method for producing a printed material includes forming a color image having an image area ratio of 20% or less on a peripheral edge portion of a recording medium by using a coloring material; providing pressure-induced phase transition particles to a region of the recording medium, the region including the peripheral edge portion; bonding the color image and the pressure-induced phase transition particles onto the recording medium; and folding the recording medium having the color image and the pressure-induced phase transition particles bonded thereon and pressure-bonding the folded recording medium, or pressure-bonding the recording medium having the color image and the pressure-induced phase transition particles bonded thereon and another recording medium placed on top of each other. The pressure-induced phase transition particles contain a styrene resin and a (meth)acrylic acid ester resin, the styrene resin contains styrene and a vinyl monomer other than styrene as polymerization components, the (meth)acrylic acid ester resin contains at least two (meth)acrylic acid esters as polymerization components, and a mass ratio of the (meth)acrylic acid esters is 90 mass % or more of a total of all polymerization components of the (meth)acrylic acid ester resin. The pressure-induced phase transition particles have at least two glass transition temperatures, and a difference between the lowest glass transition temperature and the highest glass transition temperature among the glass transition temperatures of the pressure-induced phase transition particles is 30° C. or more.

The present disclosure is appropriate for the technical field of packaging bag materials, and provides a full biodegradable high-barrier multi-layer composite material and a preparation method thereof as well as a packaging bag. The full biodegradable high-barrier multi-layer composite material comprises the following components: polylactic acid, terephthalic acid-adipic acid-butanediol copolyester, polyvinyl alcohol, polyurethane glue and starch carrageenan. Embodiments of the present disclosure provide the full biodegradable high-barrier multi-layer composite material which is obtained by using the terephthalic acid-adipic acid-butanediol copolyester as a degradable layer, using polyvinyl alcohol as a barrier layer and by composing the degradable layer with the barrier layer via polyurethane glue and starch carrageenan. Through the present disclosure, the problems, such as high oxygen permeation rate, poor barrier property and poor preservation degree, in the existing degraded film can be solved.