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CN-121990273-A - Sealable polypropylene FIBC and FIBC parts

CN121990273ACN 121990273 ACN121990273 ACN 121990273ACN-121990273-A

Abstract

The present application relates to sealable polypropylene FIBCs and FIBC components. Sealable fabric (1) for a Flexible Intermediate Bulk Container (FIBC) containing bulk material, comprising a woven fabric (10) comprising polypropylene, a coating (20) comprising polypropylene, and a sealable film (30) comprising sealable polypropylene, in particular sealable polypropylene resin.

Inventors

  • A. Erdogan

Assignees

  • FPS投资有限责任公司

Dates

Publication Date
20260508
Application Date
20251107
Priority Date
20241107

Claims (15)

  1. 1. Sealable fabric (1) for a Flexible Intermediate Bulk Container (FIBC) containing bulk material, comprising: A woven fabric (10) comprising polypropylene, A coating (20) comprising polypropylene, and A sealable film (30) comprising sealable polypropylene, in particular a sealable polypropylene resin.
  2. 2. Sealable fabric (1) according to claim 1, wherein the woven fabric (10) further comprises: sealable polypropylene, in particular sealable polypropylene resin, and/or Colorants, and/or Protecting the additive.
  3. 3. Sealable fabric (1) according to claim 1 or 2, wherein the woven fabric (10) has a weight of 40 g/m 2 -300 g/m 2 , in particular 55 g/m 2 -250 g/m 2 , preferably 75 g/m 2 -235 g/m 2 .
  4. 4. Sealable fabric (1) according to any of the preceding claims, wherein the coating (20) additionally comprises: sealable polypropylene, in particular sealable polypropylene resin, and/or Polyethylene, in particular Linear Low Density Polyethylene (LLDPE).
  5. 5. Sealable fabric (1) according to any of the preceding claims, wherein the coating (20) has a weight of 15 g/m 2 -35 g/m 2 , in particular 20 g/m 2 -30 g/m 2 .
  6. 6. The sealable fabric (1) according to any preceding claim, wherein the sealable film (30) further comprises: Polyethylene, in particular Linear Low Density Polyethylene (LLDPE) and/or low density polyethylene (LD-PE), and/or Low flowability polypropylene heterophasic copolymer, and/or And (3) a bonding material.
  7. 7. Sealable fabric (1) according to any of the preceding claims, wherein the sealable film (30) comprises at least one first layer (31) and/or at least one second layer (33) and/or at least one third layer (32).
  8. 8. Sealable fabric (1) according to claim 7, wherein the first layer (31) of the sealable film (30) comprises at least 80%, preferably at least 90%, most preferably at least 98% sealable polypropylene.
  9. 9. Sealable fabric (1) according to claim 6 or claim 7 or claim 8, wherein the second layer (33) comprises polyethylene.
  10. 10. Sealable fabric (1) according to any of claims 7 to 9, wherein the first layer (31) and the second layer (33) are connected to each other by a third layer (32).
  11. 11. Sealable fabric (1) according to any of the preceding claims, wherein the sealable film (30) is a coextruded film.
  12. 12. Sealable fabric (1) according to any of the preceding claims, wherein the sealable film (30) is produced by a multilayer blown film process, in particular by a multilayer blown film coextrusion process.
  13. 13. Sealable fabric (1) according to any of the preceding claims, wherein the sealable film (30) has a thickness of 30 μm-160 μm, in particular 30 μm-75 μm, preferably 35 μm-45 μm.
  14. 14. A Flexible Intermediate Bulk Container (FIBC) (3, 4) for containing bulk material, comprising: The sheet of at least one sealable fabric (1) according to any of the preceding claims, forming a leak-proof, seamless available space with at least one main fabric (7) and/or bottom element (6) and/or top element (9), preferably wherein the sealing areas (4) of the sheet of at least one sealable fabric (1) are sealed together.
  15. 15. A method of manufacturing a Flexible Intermediate Bulk Container (FIBC) (3, 4) for containing bulk material, comprising: Providing at least one sheet of sealable fabric (1) according to any of the preceding claims, wherein the FIBC is formed by sealing the at least one fabric (1) so as to form a leak-proof, seamless available space having at least one body fabric (7) and a bottom element (6), preferably wherein the sealing areas (4) of the sheet of at least one sealable fabric (1) are sealed together.

Description

Sealable polypropylene FIBC and FIBC parts Technical Field The invention relates to sealable fabrics and flexible intermediate bulk containers (Flexible Intermediate Bulk Container, FIBCs) made from sealable fabrics. Background Flexible Intermediate Bulk Containers (FIBCs) or large bags are industrial containers made of flexible fabric designed for storing and transporting dry and/or flowable products such as sand, fertilizer or pellets. FIBCs typically have a fill volume of about 1000 l-1300 l and can fill about 1000 kg-1500 kg. FIBCs or large bags comprise a plurality of woven fabrics made of polypropylene. Such woven polypropylene fabrics have high strength and are chemically inert. During the manufacture of FIBCs or large bags, woven polypropylene fabrics are typically stitched together. However, stitching reduces the strength of the woven polypropylene fabric by needling and thereby causing damage to the fabric. In addition, suturing can lead to leakage problems, contamination problems and is often time consuming, such as a manual process. FIBCs or large bags typically include a liner (e.g., a liner comprising Low Density Polyethylene (LDPE)) to protect the filled product. The liner is typically secured to the FIBC or the large bag by adhesive or by use of tape. Depending on the filling conditions of the FIBC, the fixing of the liner may be separate and/or handling the FIBC with the liner may be more difficult than a FIBC without the liner. US 2014/0363106 A1 teaches an alternative method for producing a flexible polypropylene fabric, wherein the polypropylene fabric comprises a coated side and an uncoated side. During manufacture, the coated sides of two polypropylene fabrics are joined together by applying heat to the polypropylene fabrics. It is an object of the present invention to provide sealable fabrics for FIBCs with improved properties for manufacturing FIBCs and reduced risk of contamination and leakage. This problem is solved by a sealable fabric according to claim 1 and a Flexible Intermediate Bulk Container (FIBC) according to claim 14. Disclosure of Invention According to the present invention there is provided a sealable fabric for a Flexible Intermediate Bulk Container (FIBC) or large bag containing bulk material. Sealable fabrics include woven fabrics comprising polypropylene, particularly additional sealable polypropylene, coatings comprising polypropylene, particularly additional sealable polypropylene, and sealable films comprising sealable polypropylene, particularly sealable polypropylene resins. The sealable fabric is thus formed in particular of different layers, a first layer comprising a woven fabric, a second layer comprising a coating and a third layer comprising a sealable film. Preferably, a coating is provided between the woven fabric and the sealable film to bond the woven fabric and the sealable film. The sealable film provides the effect that the sealable fabric can be sealed to another sealable fabric by means of a sealing technique. The sealable fabric may be sealed, in particular, by applying heat to the sealing area of the sealable fabric. Thus, the suturing operation can be eliminated. The sealable fabric is not damaged due to the sealing process, thereby providing high strength of the joined sealable fabric. Additionally, the major component of the sealable fabric is polypropylene. Thus, the entire sealable fabric can be easily recovered, providing a high degree of sustainability. In particular, the woven fabric is the load bearing layer of the sealable fabric. Sealable structures and/or materials, in particular PP and/or PE, in particular structures/materials that can be sealed by applying a temperature of at least the melting point of the material, preferably the melting point plus at least 10 ℃, further preferably the melting point plus at least 20 ℃, and/or by applying a temperature of at least 80 ℃, optionally at least 100 ℃, further optionally at least 140 ℃, further optionally at least 160 ℃, further optionally at least 200 ℃ and/or below 300 ℃, optionally below 200 ℃. Most preferably, the sealing is performed using a temperature of 100-200 ℃. The structure according to the invention shows particularly good sealability, which results from the specific combination of polypropylene-based materials with complementary thermal and rheological properties. Sealable polypropylene resins provide low seal initiation temperatures and moderate melt flow rates, ensuring fast surface melting and efficient chain interdiffusion at relatively low temperatures. The low flow polypropylene heterophasic copolymer provides a higher softening temperature and mechanical stability, preventing deformation and maintaining high seal integrity during the heat sealing process. Woven fabrics are made, in particular, from warp and weft yarns. In embodiments, the woven fabric, in particular the yarns of the woven fabric, additionally comprises sealable polypropylene, in particular sealabl