43results about How to "Heat sealable" patented technology

A multilayer heat-sealable chlorine-free odor barrier film having relatively low modulus, high interlaminar strength, and low noise upon flexing is provided. The film comprises an odor barrier layer of an amorphous polyamide resin blended with an anhydride-modified olefinic polymer or copolymer. The film also includes at least one heat-sealable skin layer, preferably two such skin layers on opposite sides of said odor barrier layer, composed of an ethylene polymer or copolymer. Pouches formed of such multilayer films are also disclosed.

The embodiments of the present invention relate to multilayer thermoplastic structures having improved sealability and tearability. More specifically, the present invention relates to a multilayer heat sealant structure having at least three layers that may be coextrusion coated or otherwise laminated to a substrate, such as metallized polymeric material, foil, or other substrates.

Disclosed is a method for preparing a machine-made water-soluble polyvinyl alcohol nonwoven fabric shopping bag. The preparation method specifically involves: (1) preparing a sizing finishing agent, wherein the sizing finishing agent comprises the following raw material components, in parts by weight: 10-20 parts of polyvinyl alcohol; 3-8 parts of a polyol copolymer polyether; 1-3 parts of a polyacrylamide hydrolysate; 2-5 parts of a polyol; 1-3 parts of an inorganic filler; 1-3 parts of urea; 0.1-0.3 part of a wetting agent; 0.2-0.5 part of an imidazolidinyl urea; 0.1-0.3 part of a p-hydroxybenzoate; and 100 parts of water; and these components are mixed to prepare the sizing finishing agent; (2) applying the sizing finishing agent to padding finishing and coating finishing processes for a polyvinyl alcohol nonwoven fabric; and (3) subjecting the polyvinyl alcohol nonwoven fabric, which has been padded or coated and sized, to mechanized automatic hot-seal bagmaking to obtain the shopping bag. The shopping bag provided by the present invention has excellent heat sealability and mechanical properties and a good hand feeling. By means of the method, the processing efficiency is improved, and the production cost is reduced.

The embodiments of the present invention relate to multilayer thermoplastic structures having improved sealability and tearability. More specifically, the present invention relates to a multilayer heat sealant structure having at least three layers that may be coextrusion coated or otherwise laminated to a substrate, such as metallized polymeric material, foil, or other substrates.

The invention provides a flushing solution with an external barrier bag filled with inert gas. The flushing solution is formed by a package and the flushing solution in the package, wherein materials in the package are respectively PP (Poly Propylene) resin on a heat sealing layer, POE (Polyolefin Elastomer) resin on a membrane layer, POE resin on a strength layer, POE resin on an adhesion layer, thermoplastic resin on a heat-resisting layer, negative-pressure gas in a gas layer, PP resin on a hot adhesion layer, polyamide resin on a strengthening layer and PET (Polyester) resin on a barrier layer in sequence from inside to outside; the gas layer is internally filled with the inert gas. According to the flushing solution with the external barrier bag filled with the inert gas, provided by the invention, a liquid medicine layer can meet integration with the flushing solution and high barrier performance on liquid; the gas layer is internally filled with the inert gas, oxygen is prevented from remaining in the gas layer, the oxygen is prevented from entering the liquid medicine to damage the liquid medicine, and meanwhile, the oxygen in the air permeating and entering the gas layer from an external sealing layer can be resisted; longitudinal grooves are formed in the inner surface of the external sealing layer, and the inert gas is even everywhere in the gas layer; the percent of pass of finished products leaving a factory of flushing solution packaging bags is increased, more guaranteed flushing solution is provided for medical units, and medication safety of patients is ensured.

Provided is a film for packaging, when an object is placed at the center of the film, wrapped by twisting the ends of the film above the object and then allowed to stand for a preset period of time, said film being capable of retaining the twisted state and thus preventing the diffusion of an offensive smell. The film according to the present invention is characterized in that the film is a film for packaging that is formed of a resin film and has a twisting retention angle of 400 degrees or greater.

The invention discloses an undrawn polyethylene film and a preparation method thereof, and relates to the technical field of packaging film materials. The preparation method comprises the following steps: performing heating plastification on different layers of prepared components and raw materials, extruding, preparing a laminated-structure material by using a T-shaped mold head, and performing later treatment, thereby obtaining the undrawn polyethylene film finally. The undrawn polyethylene film comprises five layers, namely, a thermal sealing layer, a first middle layer, an auxiliary layer, a second middle layer and a corona layer for plating an aluminum membrane in sequence. The undrawn polyethylene film disclosed by the invention is large in strength, low in air permeability, low in damp permeability, good in plated aluminum adhesion property and good in thermal sealing property.