Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hot melt adhesive composition based on a random copolymer of isotactic polypropylene

A technology for hot melt adhesives and compositions, applied in the directions of adhesives, fabrics, textiles, etc., can solve the problems of lack of flexibility and toughness, poor impact resistance, poor strength, etc., and achieve low curing shrinkage and complete compatibility. performance, good balance of performance

Inactive Publication Date: 2006-01-11
ATO FINDLEY
View PDF14 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of viscous SPP usually lacks flexibility and toughness and therefore also has poor strength and poor impact resistance
Furthermore, SPP has an inherent shrinkage problem when it transitions from a liquid to a solid crystalline state
This shrinkage often creates stress concentrations at the adhesive / substrate interface, which can lead to bond failure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hot melt adhesive composition based on a random copolymer of isotactic polypropylene
  • Hot melt adhesive composition based on a random copolymer of isotactic polypropylene
  • Hot melt adhesive composition based on a random copolymer of isotactic polypropylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-4

[0127] Hot Melt Adhesive Examples 1-4 shown in Table 2 were prepared using the ingredients and mixing procedure described above. The examples had a total weight of 2000 grams and were mixed in a laboratory mixer at 350-375°F in a carbon dioxide atmosphere consisting of a motorized stirring blade, a heating mantle, a temperature control unit, and approximately 1 gallon of Container composition. In addition to the mRCP copolymer, appropriate amounts of each ingredient calculated in the ratios in the table below were added to the container. The temperature of the vessel is then raised to melt the contents. After the ingredients in the container are completely molten, start the motor to start stirring. Next, add the mRCP copolymer ingredients and mix well in the vessel. Adhesive Examples 1-4 are particularly suitable for use as elastic attachment adhesives for elastic attachments.

[0128] Examples 1-4 were subjected to Brookfield viscosity, ring and ball softening point and c...

Embodiment 5-7

[0131] Examples 5-7 were prepared following the same procedure as above using the ingredients listed in Table 3. These formulations are particularly suitable as adhesives for various flexible packaging applications and as structural adhesives for disposable nonwoven applications. Peel strength is the most important parameter of adhesive performance when used. The peel strength of Examples 5-7 was measured and the results are reported in Table 3. Using a CT225 hot melt applicator equipped with three ITW controlled fiberization nozzles, the same polyethylene film and polypropylene spunbond nonwoven as in Examples 1-4 were laminated using the spiral spray technique, and prepared for peel strength. Measured samples. At 4 g / m at 300°F coating temperature and 0.5 second open time 2 amount of adhesive applied. The adhesives of Examples 5-7 were found to have little or very low room temperature tack, low melt viscosity, good sprayability and good film / nonwoven tack.

[0132] ...

Embodiment 8-9

[0134] Using the ingredients listed in Table 4, the hot melt adhesives of Examples 8-9 were prepared in the same procedure as above. In Examples 8 and 9, wax (Marcus 300) was included in the adhesive to replace the APAO component in the above formulation. Therefore, the binders of Example 8 and Example 9 do not contain APAO. The total amount of each example is 250 grams, mixed at 350°F under CO 2 in the atmosphere. They are especially suitable for box and case sealing applications. To illustrate this application, refer to figure 2 and image 3 ,Such as figure 2 21a and 21b, single adhesive beads (single adhesive beads) with a diameter of about 2 mm were manually applied to the upper surface of the upper flaps 22a and 22b of the corrugated box 20 . Immediately after the adhesive is applied, the upper flaps 22a and 22b of the carton 20 are folded and brought into contact with the lower flaps 23a and 23b to seal the carton 20 . Then, the flaps 22a, 22b, 23a and 23b are f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
densityaaaaaaaaaa
melt flow indexaaaaaaaaaa
melting pointaaaaaaaaaa
Login to View More

Abstract

A hot melt adhesive composition is based on an isotactic polypropylene random copolymer (RCP). The composition contains about 4%-50% by weight of the RCP copolymer, about 20%-65% by weight of a compatible tackifier, about 0%-40% by weight of a plasticizer, about 0%-3% by weight of a stabilizer, about 0%-40% by weight of a wax, and optionally about 0%-60% by weight of an atactic poly-alpha-olefin (APAO). The adhesive composition may be used in a number of applications such as, for example, in disposable nonwoven hygienic articles, paper converting, flexible packaging, wood working, carton and case sealing, labeling and other assembly applications.

Description

technical field [0001] The present invention relates to new hot melt adhesive compositions based on random copolymers (RCP) of stereospecific and predominantly semicrystalline isotactic polypropylene. More particularly, the present invention relates to adhesive compositions useful for sealing cartons / cartons and making nonwoven disposable items such as diapers and feminine hygiene products. The adhesive composition is particularly suitable for use as elastic attachments and structural adhesives in the assembly of disposable nonwoven articles. Background technique [0002] Hot melt adhesives generally exist as solids at ambient temperature and can be transformed into flowable liquids by heating. These adhesives are particularly useful in the manufacture of various disposable items in which bonding of various substrates is often necessary. Specific applications include disposable diapers, medical liners, sanitary napkins, panty liners, surgical drapes, a...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C09J123/14C08L23/14
CPCC08L23/142C09J123/142C08L2205/02C08L2666/06Y10T428/24132Y10T442/674Y10T428/31855Y10T442/602Y10T442/643Y10T442/659
Inventor 王宝玉莫尼纳·达达普·坎德斯基拉克雷蒂亚·A.·斯文宁森黛安娜·M.·施特雷洛张崇尧
Owner ATO FINDLEY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com