1104 results about "BoPET" patented technology

A process for producing an olefin polymer using a catalyst in which (A) is a solid catalyst component which includes magnesium, titanium, halogen and an electron donative compound as essential constituents; (B) is an organoaluminum component; and (C) is at least two electron donative compounds (alpha) and (beta), wherein the pentad stereoregularity of a xylene insoluble fraction of a homopolyproylene is 0<mmrr/mmmm<=0.0068 when electron donative compound (alpha) is used in combination with (A) and (B), and the pentad stereoregularity of a xylene insoluble fraction homoproplyene of a is 0.0068<mmrr/mmmm <=0.0320 when electron donative compound (beta) is used in combination with (A) and (B). A polypropylene produced in the process can be used to obtain a biaxially oriented film. (A) and (B). A polypropylene produced in the process can be used to obtain a biaxially oriented film.

A polyolefin based biaxially oriented multi-layer film having at least one surface layer comprise of the propylene-ethylene random block copolymer; The propylene-ethylene random block copolymer obtained through sequential polymerization catalyzed by a metallocene component which is composed of 30 to 70 wt % of a propylene-ethylene random copolymer component having an ethylene content of 1 to 7 wt % produced in the first step of the polymerization and from 70 to 30 wt % of a low crystallinity or an amorphous propylene-ethylene random copolymer component produced in the second step of the polymerization having an ethylene content of 6 to 15 wt % higher than that of the polymer component obtained in the first step, wherein that shows a single peak at 0° C. or lower in the temperature-loss tangent (tanδ) curve obtained by dynamic mechanical analysis (DMA).

The invention discloses a diaphragm used for preparing a lithium ion battery. The diaphragm is multilayer material formed by a polyethylene layer and a polypropylene layer which are mutually overlapped, wherein each layer is added with a heat resistant material. The preparation method of the porous diaphragm used for preparing the lithium ion battery comprises the following steps: firstly modifying the surface of a heat resistant inorganic material, uniformly mixing the inorganic material with high boiling point diluent, respectively adding polyethylene and polypropylene as well as the high boiling point diluent mixed with the inorganic material and other auxiliaries into a double screw extruder to be fully plasticized and extruded, preparing a uniform multilayer diaphragm by virtue of a multilayer die head under the control of a metering pump, and carrying out biaxial orientation stretching, washing and extracting, thus the porous diaphragm is obtained. The diaphragm prepared by the invention has higher air permeability and higher anti-puncture strength, more importantly, diaphragm rupturing temperature is higher, obturator temperature is lower, and shrinkage rate is lower, thus the diaphragm prepared by the invention is a novel diaphragm used for the lithium ion battery and has excellent properties.

The invention relates to a preparation method of a transparent flame-retarding polyester film, comprising the following steps: mixing 100 parts of terephthalic acid and 35 parts of glycol; adding mixed liquid of 7.3-11.6 parts of structural phosphorus flame retardant and 30 parts of glycol, 3-4 parts of catalyst and 1.5-3 parts of stabilizing agent; carrying out esterification reaction for 0.5-1hat 100-115 DEG C under 400-600 pa; carrying out condensation polymerization for 2-3h at 260-290 DEG C under 10-70 pa to obtain a copolymerization lame-retarding polyester slice; after 35-50 percent ofcopolymerization lame-retarding polyester slice is crushed, mixing, extruding and granulating the copolymerization lame-retarding polyester slice and 2.6-6.3 parts of addition type flame retardant toprepare a blending lame-retarding polyester slice; after the residual copolymerization lame-retarding polyester slice and the blending lame-retarding polyester slice are crushed, adding 0.04-0.085 part of antiblocking agent, mixing and then transmitting into an extruder in a mixing mode; and preparing a film with a thickness with 50-300 micron by casting pieces, stretching in a bidirectional mode, thermally forming and rolling.

The invention relates to a packaging film for two-way stretch polypropylene low temperature self-constriction cigarette and a production method thereof. The film comprises a surface layer A, a core layer B and a surface layer C; the surface layer A includes the raw materials according to the following weight percent: 80-90 of propylene copolymer, 5-10 of lubricate master batches and 5-10 of antiblocking master batches; the core layer B includes the raw materials according to the following weight percent: 62-77 of propylene homopolymer, 20-35 of hardness increase master batches and 3-5 of antistatic master batches; and surface layer C includes the raw materials according to the following weight percent: 80-94 of propylene copolymer, 3-10 of lubricate master batches and 3-10 of antiblocking master batches. The production method includes the following steps: (1) mixedly preparing; (2) making thick plates; (3) performing three-point stretching to the thick plates by three groups of stretching rollers to finally realize 6-8 multiples of longitudinal stretching after the thick plates enter into a longitudinal stretching machine; (4) transversely stretching; (5) towing and rolling up; and (6) dividing and cutting. The invention enables a cigarette factory to cancel a burning device and realizes the self-constriction in use of the cigarette film, thereby improving the packaging quality and beautifying the appearance of cigarette packs.

The invention discloses a preparation method and a product of a polytetrafluoroethylene (PTFE) film. The preparation method comprises the steps of: mixing PTFE resin powder with a liquid lubricant, extruding, calendering, longitudinally stretching, laterally stretching and heat setting, and rapidly spraying cooling water under certain pressure to obtain a bidirectional stretched PTFE microporous film with the micropore aperture of 0.2-10, the lateral shrinkage of smaller than 3%, and the longitudinal shrinkage of smaller than 5%. The PTFE film has stable lateral and longitudinal dimension, great improvement of film usability, simple process and low cost.

The invention discloses a biaxially oriented matte BOPA (Biaxially oriented polyamide film) thin film which is formed by a single frosted surface layer, or is formed by laminating the frosted surface layer and a smooth surface layer, or is formed by sequentially laminating the frosted surface layer, a middle layer and the frosted surface layer or is formed by sequentially laminating the frosted surface layer, the middle layer and the smooth surface layer. A method for preparing the biaxially oriented matte BOPA thin film comprises the following steps of: 1, placing the raw materials on each layer into a corresponding extruder to carry out melting and carrying out coextrusion by a die head to form a layer structure; 2, cooling and forming to obtain a crude product nylon thin film; and 3, carrying out biaxial stretching, heat setting, corona treatment and winding on the crude product nylon thin film to obtain the matte BOPA thin film product. The invention can overcome the defects of unstable quality of a conventional process, low yield, fussy process and high cost of the product; and the produced biaxially oriented matte BOPA thin film has a high quality.

The invention relates to a coated high-barrier biaxially stretched polylactic acid film and a preparation method thereof. The coated high-barrier biaxial tensile polylactic acid film structurally comprises a high-barrier coating, a bottom coating and a substrate layer from inside to outside in sequence, wherein the substrate layer is composed of three layers of a co-extruded biaxially stretched PLA (polylactic acid) film, namely a layer A, a layer B and a layer C; the layer A and the layer C comprise the following components in parts by mass: 68-93.2 parts of PLA, 5-20 parts of a toughening agent, 1-3 parts of a compatibilizer, 0.2-1 part of a chain extender, 0.2-1 part of an antioxidant, 0.5-3 parts of an antistatic agent, 0-1 part of an open agent and 0-1 part of a smoothening agent; thelayer B comprises the following components in parts by mass: 76-93.8 parts of PLA, 5-20 parts of a toughened resin, 1-3 parts of a compatibilizer and 0.2-1 part of a chain extender; and the high barrier coating is a water-resistant modified PVA coating. Production procedures are simple, green and environmental protection materials are used, and the film is excellent in performance, and still hasa good barrier effect in case of a very thin high-barrier coating.

The invention discloses a capacitor film with biaxially oriented polypropylene as a base body and a preparation method thereof. The capacitor film comprises the raw materials in parts by weight: 68-72 parts of biaxially oriented polypropylene, 23-28 parts of LDPE (low-density polyethylene), 10-15 parts of homo-polypropylene, 3-5 parts of epoxy linseed oil, 2-3 parts of polyving akohol, 1-2 parts of aluminium hydroxide, 1-2 parts of polyisobutene, 8-12 parts of diatomite, 1-2 parts of ferrocene, 0.7-0.9 part of poly-4-methyl-1-amylene, 10-12 parts of K-feldspar powder, 1-3 parts of nanosilicon dioxide, 0.9-1.1 parts of 2,6-di tert butyl phenol-alpha-dimethylamino phenol, 1-3 parts of calcium stearate, 1.4-1.6 parts of phenyltriethoxysilane, and 1.7-2.3 parts of modified tree ash. The biaxially oriented polypropylene serving as a primary material, low-density polyethylene serving as an auxiliary material and a plurality of auxiliary materials are mixed, extruded and subjected to film blowing, shaping and cutting to prepare the capacitor film. The capacitor film is simple in preparation method; and the diatomite, the K-feldspar powder, the nanosilicon dioxide and the modified tree ash are added to the materials at the same time. Therefore, the barrier property and the gas tightness of the film are increased; and the capacitor film has good resistance to pressure and shock resistance, and has the characteristics of high heat sealing strength and good heat sealing property at the same time.

The invention discloses a method for manufacturing a porous multilayer composite diaphragm for a lithium battery and a diaphragm manufactured by the same. In the method, polyethylene mixed with solvent and heat-resistant resin mixed with the solvent are extruded by using a multilayer die head of a double-screw extruder, and the extruded products are subjected to chill casting, two-way stretch, washing, drying and heat setting to manufacture the porous multilayer composite diaphragm. An integral structure of the manufactured diaphragm comprises a polyethylene layer and a heat-resistant resin layer, has low closed-cell temperature given by the polyethylene and high diaphragm breaking temperature given by the heat-resistant resin layer simultaneously. Simultaneously, the addition of the heat-resistant resin layer reduces the heat contractibility of the multilayer diaphragm and improves the puncture strength of the multilayer diaphragm, so the multilayer diaphragm has more excellent performance.

A laminated film which is excellent in thermal dimensional stability, cushion properties and low dielectric characteristics is disclosed. The laminated film comprises at least two layers among which at least one layer is a biaxially oriented film composed of a thermoplastic resin composition and at least one other layer is a film having a network structure.

The invention relates to a chemical treated metalizing BOPET precoating film and a processing technique. The precoating film comprises a substrate, an intermediate layer and a hot cement layer, and is characterized in that the substrate is a chemical treated metalizing BOPET, the intermediate layer is PEI and the hot cement layer is EVA. The intermediate layer and the hot cement layer are coated and compounded on one surface of the substrate, thus obtaining the chemical treated metalizing BOPET precoating film. As the substrate layer of the precoating film adopts the chemical treated metalizing BOPET, after the presswork is laminated during the application process of the metalizing BOPET, various printings can be carried out on the chemical layer of the surface of the substrate, and otherprecoating films can not be applied in the way like the metalizing BOPET; in addition, being metalized, the substrate has good blocking performance and lightproof; meanwhile, the precoating film alsohas the advantages of high brightness and high tensile strength that the common BOPET precoating film can not compare with.

The invention discloses a multifunctional composite material and a preparation method thereof. The composite material is prepared from the following components: 30 to 70 mass parts of thermoplastic resin, 30 to 70 mass parts of heat-conducting or/and electricity-conducting filler, 0 to 20 mass parts of a processing auxiliary agent; the multifunctional composite material is prepared by preparing aparison through an extruding casting or solution casting method, and then performing unidirectional drawing or bidirectional drawing; the multifunctional composite material is characterized in that the filler with an asymmetrical structure forms an orientation structure in a resin matrix, so that different heat conductivity or/and electricity conductivity in different directions of the composite material are ensured. The heat-conducting or/and electricity-conducting functional composite material disclosed by the invention has high heat conductivity or/and electricity conductivity, and can be used in other application fields of electronic and electric products, heat management and the like with a directional requirement on the heat conductivity or/and the electricity conductivity.

The invention belongs to the field of building decorative materials, and in particular relates to a granulation-free ecological plate high-pressure decorative surface material and a manufacturing method thereof. The granulation-free ecological plate high-pressure decorative surface material comprises a bottom paper layer, a core paper layer, a decorative paper layer and a surface paper layer which are sequentially arranged, wherein a demolding agent coating layer is coated on one surface (back on to the core paper layer) of the bottom paper layer. During subsequent processing, the back of a product does not need to be granulated after the process of edge sawing, so that the transverse tensile strength can be obviously improved, and the thickness can be obviously reduced; and the decorative surface material which is 0.25mm thick can be produced. The manufacturing method comprises the following steps of: preparing a special demolding agent, immersed core paper, immersed bottom paper, immersed decorative paper and immersed surface paper, assembling a blank and performing thermal pressing. During thermal pressing, the bottom paper demolding layers of two groups of plate blanks are in direct contact with each other, and an aluminum plate or a bidirectionally stretched PP thin film does not need to be used as an isolation material; and therefore, the cost is saved, pavement is facilitated and quick, and the production efficiency is high; waste cannot be produced; and the environment pollution and subsequent treatment energy consumption are reduced.

The invention designs a high barrier PVA alloy capable of being processed with a thermoplasticity method. specifically speaking, through various monolayer or multi-layer thermoplasticity processing extrusion processing devices, the alloy is made into various high barrier films containing the alloy comprising a monolayer film, a multi-layer extrusion film, a high temperature retort film, a two-way stretch film and a thermo shrink film, hollow containers comprising a car oil tank, a bottom and a barrel, various tubular products comprising a fuel oil or oil delivery pipe and a gas pipe, various sheets and all high barrier products made from the material. The product made form the material has excellent chemically resistant performance, oil resistance, solvent resistance, transparency, processing stability, high barrier performance for various gases, aroma protection property, tensile strength and elongation at break.

The invention discloses a digital pre-laminating film which is characterized in that the digital pre-laminating film is composed of a base material layer and a hot melt adhesive layer, wherein the base material layer and the hot melt adhesive layer are compounded; the base material layer is a two-way stretch polypropylene film or a two-way stretch polyester film; the hot melt adhesive layer is the mixture of EVA processed in a coupling manner and petroleum resin in the following weight percent: 85-94% of EVA processed in a coupling manner and 6-15% of petroleum resin. After the invention uses a digital print surface, the print surface is smooth and light, thus greatly improving the glossiness and the fastness of the print, prolonging the service life of the product, and performing the protective functions of water prevention, pollution prevention, abrasion resistance, hard fold and the like. The print after being covered with film has vivid and beautiful appearance and is full of three-dimensional texture. The invention is suitable for heating mounting and laminating for advertising paper printing and the like for advertising spray painting, colour painting and the like and opens a new application field in the heating mounting and pre-laminating field.

A preparation method of biaxially oriented polyester (BOPET) film surface wear-resistant scratch-resistant coating relates to a preparation method of a BOPET film surface coating and solves the problems of high cost and poor wear resistance and scratch resistance of the coating when preparing the BOPET film surface wear-resistant scratch-resistant coating in the prior art. The preparation method of the invention includes the following steps of: uniformly mixing polyurethane hexa-acrylate, epoxy modified acrylate, dipentaerythritol monohydroxy hexa-acrylate, trimethylolpropane tri-acrylate, tripropylene glycol diacrylate, butyl titanate and compound cracking light trigger to obtain coating material; then coating the coating material on the BOPET film surface done with corona treatment, and finally obtaining the (BOPET) film surface wear-resistant scratch-resistant coating after ultraviolet curing. The BOPET film surface wear-resistant scratch-resistant coating has low cost and good wear resistance and scratch resistance, and the coating performance pencil hardness is over 3H.