Back to results
US 11,173,688 B2Granted
Ultra violet light resistant laminate, and process of manufacturing the same
AssigneeEssel Propack Ltd.
InventorsSatya Prasad Bhattacharya, Mrinal Kanti Banerjee
Life of this patent
Estimating the term…
Abstract
The present disclosure relates to a laminate comprising: an outer polyethylene layer comprises at least 10% on the weight of polyethylene, a UV radiation blocking agent or a chromophore; a barrier layer with at least 15%-50% of an aromatic polyamide; and a polyethylene sealant layer. The Ultra Violet radiation resistant laminate is an opaque laminate or a transparent laminate. The outer polyethylene layer and the barrier layer with at least one aromatic polyamide is a multilayer film, preferably three layer film. The present disclosure also relates to a process for the preparation of the laminate.
Claims11
An Ultra Violet radiation resistant laminate comprising:
- an outer polyethylene layer, which comprises at least 10% of a UV radiation blocking agent based on the total weight of the polyethylene;
- a barrier layer;
- and
- a polyethylene sealant layer,
- wherein, the laminate is transparent and capable of preventing UV-radiation in UV-A region (from 380 nm-315 nm), UV-B region (from 315 nm-280 nm), and UV-C region (from 280 nm-200 nm), and
- wherein the barrier layer is a seven-layer film of total thickness 79μ consisting of:
- a first layer and a seventh layer, which consist of 90% by weight of LLDPE and 10% by weight of LDPE, each of the first and seventh layer having a thickness of 20μ;
- a second layer and a sixth layer, which consist of 80% by weight of LLDPE and 20% by weight of Maleic Anhydride Grafted Polyethylene, each of the second and sixth layer having a thickness of 12μ;
- a third layer and a fifth layer, which consist of 50% by weight of PA 6 and 50% by weight of aromatic polyamide, each of the third and fifth layer having a thickness of 5μ;
- and
- a fourth layer, which comprises 90% Ethylene Vinyl Alcohol (EVOH) having a thickness of 5μ.
8 more elements
A laminate comprising:
- an outer polyethylene layer having a thickness of 100μ, which comprises at least 10% of a UV Radiation blocking agent on the total weight of the polyethylene or a chromophore;
- a first lamination layer of polyethylene;
- a barrier layer;
- a second lamination layer polyethylene;
- and
- a polyethylene sealant layer,
- wherein, the outer polyethylene layer is a multilayer film, and
- the outer polyethylene layer comprises of Low Density Polyethylene (LOPE) and Linear Low Density Polyethylene (LLDPE) in a ratio of 70:30 to 30:70 w/w, and
- wherein, the laminate is transparent and capable of preventing UV-radiation in UV-A region (from 380 nm-315 nm UV-B region (from 315 nm-280 nm), and UV-C region (from 280 nm-200 nm),
- wherein the barrier layer is a seven-layer film of total thickness 79μ consisting of:
- a first layer and a seventh layer, which consist of 90% by weight of LLDPE and 10% by weight of LDPE, each of the first and seventh layer having a thickness of 20μ;
- a second layer and a sixth layer, which consist of 80% by weight of LLDPE and 20% by weight of Maleic Anhydride Grafted Polyethylene, each the second and sixth layer having a thickness of 12μ:
- a third layer and a fifth layer, which consist of 50% by weight of PA 6 and 50% by weight of aromatic polyamide, each of the third and fifth layer having a thickness of 5μ:
- and
- a fourth layer, which comprises 90% Ethylene Vinyl Alcohol (EVOH) having a thickness of 5μ.
12 more elements
A laminate comprising:
- an outer polyethylene layer (210) that comprises at least 10% of a UV Radiation blocking agent on the total weight of the polyethylene or a chromophore;
- a polyethylene lamination layer (211);
- a barrier layer made of seven layers of film of total thickness 79μ consists of the following layers in order:
- a polyethylene layer (209) containing LDPE and LLDPE;
- a tie layer (208) of maleic anhydride grafted polyethylene;
- a polyamide layer (206), which comprises UV blocking amorphous aromatic polyamide and semi crystalline aliphatic polyamide in a weight ratio of 1:1;
- a barrier core layer (205) with comprising Ethylene Vinyl Alcohol (EVOH) and from 15% to 50% by weight of an UV blocking aromatic polyamide;
- a polyamide layer (207), which comprises UV blocking amorphous aromatic polyamide and semi crystalline aliphatic polyamide in a weight ratio of 1:1;
- a tie layer (204) of maleic anhydride grafted polyethylene;
- a polyethylene layer (203) containing LDPE and LLDPE;
- a polyethylene lamination layer (201);
- and
- a polyethylene sealant layer (202),
- wherein, the outer polyethylene layer is a multilayer film, which comprises Low Density Polyethylene (LDPE) and Linear Low Density Polyethylene (LLDPE) in a ratio of 70:30 to 30:70 w/w, and
- wherein, the laminate is transparent and capable of preventing UV-radiation in UV A region (from 380 nm-315 nm), UV-B region (from 315 nm-280 nm), and UV-C region (from 280 nm-200 nm).
12 more elements
Dependencies are inferred from the claim text.