摘要:
The invention relates to a high modulus, bi-axially oriented film, heat-shrinkable or non heatshrinkable, comprising a first outer layer comprising a polyester or a copolyester, a second outer layer comprising an ethylene or propylene homo- or co-polymer, a core layer comprising an ethylene-vinyl alcohol copolymer, and no core polyamide or polyester layers. The film according to the present invention is prepared by orienting biaxially a flat extruded tape by means of a tenter frame, preferably simultaneously, and has a modulus higher than 6,000 kg/cm2 in at least one direction. The film of the present invention is particularly useful, in the non heat-shrinkable version, for food and non food packaging applications.
摘要翻译:本发明涉及一种高模量双轴取向膜,可热收缩或不可热收缩,其包含第一外层,其包含聚酯或共聚酯,第二外层包含乙烯或丙烯均聚物或共聚物, 核心层包含乙烯 - 乙烯醇共聚物,并且没有芯聚酰胺或聚酯层。 根据本发明的膜通过拉幅机双轴方向取向,优选同时进行,并且在至少一个方向上具有高于6,000kg / cm 2的模量。 本发明的膜在非热收缩型中特别适用于食品和非食品包装应用。
摘要:
A multi-layer, thermoplastic film bi-axially oriented at a stretching ratio ≧ to about 3.0:1 in the machine direction and at a stretching ratio ≧ about 6.0:1 in the transverse direction, which film comprises a layer a) comprising at least 50 wt. % of a crystalline or partially crystalline co-polyamide characterized by a Tg≦100° C. and at least one outer heat-sealing layer b) comprising a polyolefin, said film being further characterized in that it has a % free shrink at 100° C.≦3 in each direction.
摘要:
A bi-axially oriented, heat-shrinkable multi-layer film comprising a core layer (A) comprising an ethylene-vinyl alcohol copolymer (EVOH), a first outer layer (B) comprising an ethylene homo- or co-polymer and a second outer layer (C), which may be equal to or different from the first outer layer (B), comprising an ethylene homo- or co-polymer, characterized in that said film has been bi-axially oriented at an orientation ratio in the longitudinal direction higher than 4:1, preferably higher than 4.5:1, more preferably of at least 5:1 and at an orientation ratio in the cross-wise direction higher than 4:1, preferably higher than 4.5:1, more preferably of at least 5:1, is obtained by a process which comprises melt extrusion of the film polymers through a flat die and orientation of the obtained cast sheet simultaneously in the longitudinal and the transversal directions by a simultaneous tenter.
摘要:
Coextruded, biaxially oriented, heat-shrinkable films having a base layer comprising a polyester having an intrinsic viscosity greater than 0.75 and at least one outer heat-sealable layer directly adhered to the base layer are disclosed. The outer layer is heat-sealable and optionally peelable in particular to polyester containers. The invention further relates to a process for producing the film and to packages comprising a container, a product and the coextruded, biaxially-oriented heat-shrinkable film sealed onto the container. The packages are suitable for use with ready-prepared foods, so-called “ready-meals”, which are intended to be warmed in a microwave or in a conventional oven.
摘要:
Heat-shrinkable polyester films comprising a base film having a shrink in each direction of less than 5% at 100° C. and of at least 5% at 150° C. and at least a heat-sealable coating on at least one surface of the base film are disclosed. The film is heat-sealable and peelable in particular to polyester containers. The invention further relates to packages comprising a container, a product and the heat-shrinkable polyester film sealed onto the container. The packages are suitable for use with ready-prepared foods, so-called “ready-meals”, which are intended to be warmed in a microwave or in a conventional oven.
摘要:
A multilayer oriented film comprising at least one layer (a) comprising one or more polyesters and/or copolyesters characterized by a % of crystallinity higher than 15, an adjacent layer (b) comprising one or more polyolefin-based adhesive resins, and a layer (c) comprising one or more co-polyesters characterized by a % of crystallinity lower than 15, is positioned between said two layers (a) and (b) in such a way that one of the two principal surfaces of layer (c) is directly adhered to layer (a) and the other is directly adhered to layer (b).The presence of a co-polyester layer (c) of relatively low % crystallinity positioned between (co)polyester layer (a) and adhesive layer (b) remarkably increases the bond between the two layers (a) and (b) and prevents delamination problems in the oriented structure.
摘要:
A multilayer, biaxially oriented, heat shrinkable thermoplastic film includes a layer having between 50 and 100 parts by weight ethylene/alpha-olefin C.sub.4 -C.sub.12 copolymer, and between 0 and 50 parts by weight of a polymer selected from polyolefin, and modified polyolefin, the layer having more than one melting point when detected by diffential scanning calorimetry according to ASTM D-3418; wherein the total thickness variation in the multilayer film is lower than .+-.10%, and wherein the average deviation of the multilayer film from a straight line is lower than .+-.40 mm, and wherein the sag average of the multilayer film is lower than 25 mm. A method of making the film, and a package made with the film, are also disclosed.
摘要:
Multi-layer, gas-barrier, either cast or solid-state oriented, heat-shrinkable, annealed or heat-set, films and sheets suitable for packaging applications which comprise a microlayer sequence (a) comprising a number n of identical repeating units (a′), each comprising the sequence A/B/C, wherein A is a layer comprising a major proportion of one or more thermoplastic (co)polyamides, B is either a layer comprising a major proportion of one or more ethylene-vinyl alcohol copolymers or a layer comprising a major proportion of a (co)polyamide characterized by an OTR of less than 100 cm3.25 μm/m2.day.bar at 23° C. and 0% of RH, C is either nil or a layer comprising a major proportion of one or more thermoplastic (co)polyamides, and n stands for an integer of 3 or more, an outer layer (b) comprising one or more polymers selected from polyolefins, modified polyolefins, and thermoplastic (co)polyesters, and a tie layer between the outer layer (b) and the microlayer sequence (a).
摘要翻译:适用于包装应用的多层,气体阻挡层,可以是铸造或固态取向的,热收缩的,退火的或热定型的膜和片材,其包含数个n个相同重复单元的微层序列(a) a'),每个包含序列A / B / C,其中A是包含主要比例的一种或多种热塑性(共)聚酰胺的层,B是包含主要比例的一种或多种乙烯 - 乙烯醇 共聚物或包含大部分(共)聚酰胺)的层,其特征在于在23℃和0%RH下OTR小于100cm 3·25μm/ m 2·天.bar,C为零或层 包括主要比例的一种或多种热塑性(共)聚酰胺,n表示3或更大的整数,外层(b)包含一种或多种选自聚烯烃,改性聚烯烃和热塑性(共)聚酯)的聚合物, 和外层(b)和微层序列(a)之间的连接层。
摘要:
The invention relates to a high modulus, bi-axially oriented film, heat-shrinkable or non heatshrinkable, comprising a first outer layer comprising a polyester or a copolyester, a second outer layer comprising an ethylene or propylene homo- or co-polymer, a core layer comprising an ethylene-vinyl alcohol copolymer, and no core polyamide or polyester layers. The film according to the present invention is prepared by orienting biaxially a flat extruded tape by means of a tenter frame, preferably simultaneously, and has a modulus higher than 6,000 kg/cm2 in at least one direction. The film of the present invention is particularly useful, in the non heat-shrinkable version, for food and non food packaging applications.
摘要翻译:本发明涉及一种高模量双轴取向膜,可热收缩或不可热收缩,其包含第一外层,其包含聚酯或共聚酯,第二外层包含乙烯或丙烯均聚物或共聚物, 核心层包含乙烯 - 乙烯醇共聚物,并且没有芯聚酰胺或聚酯层。 根据本发明的膜通过拉幅机双轴方向取向,优选同时进行,并且在至少一个方向上具有高于6000kg / cm 2的模量。 本发明的膜在非热收缩型中特别适用于食品和非食品包装应用。
摘要:
A highly oriented, heat-shrinkable, multi-layer film comprising a layer a) comprising a polyamide and an outer heat-sealing layer b) comprising a polyolefin, which film has been oriented at a stretching ratio ≧ about 3.0:1 in the machine direction and at a stretching ratio ≧ about 6.0:1 in the transverse direction, characterized in that the polyamide of layer a) is a crystalline or partially crystalline co-polyamide with a Tg≦100° C.