43results about How to "Reduce droplet" patented technology

This invention relates to ejecting an underfill resin at multiple semiconductor die edges such that vacuum suction provided at a laminate through hole located beneath a stage enables spread of underfill resin from each edge simultaneously for quicker spread and reduction of voids. The excess underfill resin intentionally suctioned through the through hole air vent on the underside of the laminate is attracted to re-usable tape. The attracted underfill resin is cleaned from a rotating head mechanism by a cleaning pad positioned beneath a lower surface of the head.

The invention provides flame-retardant anti-dripping high-moisture-permeability artificial leather and a preparation method thereof. The TPU (thermoplastic polyurethanes) artificial leather is formed by compounding of a TPU foaming layer and a TPU leather film face layer on a flame-retardant base cloth layer, wherein the leather film face layer and the foaming layer as well as the foaming layer and the base cloth layer are adhered through a low-melting-point TPU adhesion layer. Each of the leather film face layer, the foaming layer and the adhesion layer realizes film formation by casting after phosphorus-nitrogen intumescent flame retardants and anti-dripping agents are doped into TPU resin particles, and a protein ultrafine powder pore-foaming agent is especially doped into the leather film face layer and the adhesion layer to improve moisture permeability. The high-moisture-permeability artificial leather for clothes is long in flame retardation time, generates no or few molten drops in combustion and can be applied to clothing articles such as clothes, shoes, caps, gloves and the like and used as a fabric for high-temperature-resistant protection garments.

The invention discloses a water-based formaldehyde-free adhesive for a flame-retardant composite board and a preparation method thereof. The adhesive is mainly made of fumaric acid-aluminum complex, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide complex, microencapsulated isocyanate, defatted soybean powder; high temperature When burning, defatted soy flour decomposes to produce isocyanate and polyurethane decomposes to produce isocyanate and fumaric acid to form imine structure, 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and phosphaphenanthrene-10-oxide The amine structure undergoes an addition reaction to produce nitrogen-containing compounds. The nitrogen-containing compounds thermally decompose during combustion to produce ammonia inert gas, which reduces the concentration of combustible gases and the combustion rate. The nitrogen-containing compounds burn to form a carbon layer, which reduces molten droplets and improves flame retardancy. . The adhesive prepared by the present invention has improved water resistance on the basis of water-based adhesives, does not contain aldehyde groups, does not release formaldehyde to pollute the environment, and has good flame retardancy, which can effectively slow down the burning rate of the composite board. It has high practicality and production value.