45results about How to "Excellent pinhole resistance" patented technology

The invention discloses a laminated material without metal foil for a blocking package. The material at least comprises a substrate layer assembly and a composite blocking layer assembly, wherein the substrate layer assembly and the composite blocking layer assembly are laminated together; the substrate layer assembly has the effect of supporting; and the composite blocking layer assembly comprises at least one composite blocking layer which is prepared through a partition-laminated confluence layer multiplication and coextrusion method and comprises a plurality of repeated units. The material is characterized in that each repeated unit at least comprises three polymer constitutes, and each polymer constitute can form an individual layer or more than one individual layer; and only one of the polymer constitutes is a blocking polymer constitute which can block gas.

The invention discloses a barrier-property lapped polymer film packaging material comprising at least one layer-multiplied and coextruded lapped barrier compound layer. Each barrier compound layer comprises a plurality of repeating units which comprise at least two individual layers; each individual layer corresponds to one of two different polymers; at least one repeating unit of the lapped barrier compound layer at least comprises three individual layers; each of the individual layers corresponds to one of three different polymers; and at least one of the at least three polymers forms at least one barrier-property polymer part which can separate gas.

The invention discloses a vacuum bag manufacturing method, and further discloses a product obtained by adopting the method. The vacuum bag manufacturing method and the product of the vacuum bag comprise a bag body and a vent valve. The vent valve comprises a valve seat, a valve cover and a cone-shaped soft plug. The method is easy in manufacturing procedure, easy to realize, and capable of being used for quickly manufacturing the vacuum bag product which is good in sealing effect and convenient to use. The vacuum bag product is ingenious and reasonable in structural design. The cone-shaped soft plug and an opening of an accommodating cavity are matched for sealing air, an operator just needs to cover the valve cover to ensure that the cone-shaped soft plug is tightly attached on the opening, and accordingly sealing effects are achieved. The valve cover is plugged out to ensure that air freely enters and leaves the bag body to bring convenience to air pumping and use. Furthermore, a flange is arranged on the opening to further strengthen sealing effects, and articles can be beneficially stored for a long period. A bag opening can be quickly opened or sealed through concave-convex seals. The vacuum bag manufacturing method and the product of the vacuum bag are convenient to use and simple and easy to operate, bring great convenience to the steps of taking and putting the articles and life of people, and facilitate wide promotion and applications.

The invention belongs to the technical field of powder paint, particularly relates to a compound curing agent used for polyester-type powder paint, and further discloses a production method and application of the compound curing agent used for the polyester-type powder paint. The compound curing agent used for the polyester-type powder paint is mainly produced by using trimesic acid,tris(2,3-epoxypropy)ester and diglycidyl terephthalate as main raw materials and selectively adding 1,2,4-benzenetricarboxylic acid,tris(2,3-epoxypropy)ester, hydroxy polyester resin, bicyclopentadiene dioxide and/or crystalline epoxy resin for mixing reaction. The compound curing agent used for the polyester-type powder paint has a good curing effect, the mechanical performance of a produced coating is stable,and meanwhile, the coating has good boiling-resistant performance; and when the compound curing agent used for the polyester-type powder paint and polyester resin are cured, the performance of a product of the compound curing agent used for the polyester-type powder paint and the polyester resin totally reaches curing effects of current TGIC and HAA curing agents, and the compound curing agent used for the polyester-type powder paint and an existing TGIC or HAA product can be mixed for use, so that the comprehensive performance is more excellent.

A polyamide based resin film roll is provided. The polyamide based resin film roll comprising: a first sample cutout portion within 2 m from the winding end of film; and a final cutout portion within 2 m from the winding start of film, wherein when a sample cutout portion is set up in approximately every 100 m from the first sample cutout portion, in all samples cut out from each of the cutout portions, mechanical properties such as boiling water shrinkage percentage and refraction index in the thickness direction are adjusted within a given range of variation width.

A biaxially oriented polyester film of the present invention which comprises a polyester resin prepared by polymerizing a glycol component mainly comprising 1,3-propanediol and an acid component mainly comprising terephthalic acid or dimethyl terephthalate, said polyester film having an unit impact absorption energy of 1.0 or more, can be advantageously used for packaging.

The invention relates to a paper-plastic-aluminum package material used for boiling-resistant sterilization technology as well as a preparation method thereof. The packaging material has a six-layer composite structure, the package material comprises a polymer coating layer with high peeling intensity, a cardboard layer, a composite layer, an aluminium foil layer, a bonding layer and a polymer film heat-sealing layer with good heat resistance in order from outer to inner, and the polymer coating is a mixed coating layer of medium-density polyethylene resin and caking property polyethylene resin. The preparation method comprises the followings steps: the composite layer is extruded between the cardboard layer and the aluminium foil layer through an extruder; the bonding layer is extruded between the aluminium foil layer and the polymer film heat-sealing layer through the extruder; the polymer coating layer is extruded at the outside of the cardboard layer, so that an integral structure is formed by bonding. The method enhances the combination fastness of an external layer material and the cardboard, avoids disconnection of four angles after moulding of the paper-plastic-aluminum package material, the paper-plastic-aluminum package material has advantages of heat resistance and pin hole resistance, and the preparation cost is reduced.

The invention discloses a novel PET (polyethylene terephthalate) strap with a multi-layer structure. The novel PET strap comprises a PET polyester layer, a PETN (pentaerythritol tetranitrate) polyester layer, a PET modified layer and a PET film sequentially from outside to inside. The novel PET strap has excellent wear resistance, folding resistance, pinhole resistance, tear resistance and the like; the heat shrinkage is quite low and is only 1.25% after the strap is placed at the temperature lower than 120 DEG C for 15 min; the PET strap has good antistatic property. The novel PET strap with the structure has very high toughness, high wear resistance and good antistatic property, can still guarantee work in a complex environment and is particularly suitable for packaging products such as electronic products, high precision instruments and the like.